Sharp 21LT-45SES Service manual

21LT-45S
SERVICE MANUAL
SE0021LT45S00
Issued: 16th Feb. 2004
AK- 44 CHASSIS
PAL B/G / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION
MODEL
21LT-45SES
In the interests of user safety (required by safety
regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.
In order to service the model 21LT-45S, refer to
the
AK-44
Chassis
Service
Manual
(SE00AK44CHA00).
CONTENTS
ELECTRICAL SPECIFICATIONS ........................................................................................ 3
IMPORTANT SERVICING NOTES ...................................................................................... 4
CONTROLS & TERMINALS ................................................................................................ 5
PRINTED WIRING BOARD LAYOUT ................................................................................. 6
PARTS LISTING ................................................................................................................... 7
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 11
SHARP CORPORATION
1
This document has been published to
be used for after sales service only.
21LT-45S
SERVICE MANUAL UPDATE LOG SHEET
Technical Report No.
Technical Bulletin No.
Cause / Solution
Part No.
Page No.
Application
Data /Serial No.
Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc.
If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
If you need more information, please refer to the Technical Report (Bulletin).
2
21LT-45S
ELECTRICAL SPECIFICATIONS
•Picture Intermediate frequency
L’ ................................................ 33.9MHz
L, B/G, D/K .............................. 38.9MHz
•Power Input .................... 220V-240 Volts AC 50 Hz
•Power Consumption
Normal Operation (Method IEC60107) .............. 60 W
Stand-by Operation .......................................... < 3 W
•Sound Carrier Trap
L’ ................................................ 40.4MHz
L, D/K ......................................... 32.4MHz
B/G ............................................ 33.4MHz
•Audio Power Output Rating (MPO) / Impedance
Internal Speaker .......................................... 4 W, 16 Ω
•Adjacent Sound Carrier Trap
L’ ................................................ 32.4MHz
L, D/K, B/G ................................ 40.4MHz
•Speakers
Speaker (1 pc) .......................................... 50 x 90 mm
•Adjacent Picture Carrier Trap
L’ ................................................ 41.9MHz
L, D/K ...................................... 30.9MHz
B/G ............................................ 31.9MHz
•Convergence (Maximum Misconvergence)
mm
21”
AREA
A
BC
DE
FGHJ
KLMN
F’G’H’J’
STUV
0.3
1.0
1.0
1.3
1.2
1.2
1.1
•Aerial Input Impedance
VHF/UHF ................. 75 ohm Unbalanced
•Tuning Ranges ..... 48.25MHz thru 855.25 MHz
VHF: S1 - S41 CH (Hiperband)
E2 - E12 / F2 - F10
UHF: E21 - E69
•White Level
Apply the rated voltage at the rated frequency to the TV set, while it is receiving full white pattern RF signal of 60
dB/µV from its RF input via the pattern generator.
Turn all picture controls to maximum value. Measure the colour temperatures at the center of the screen by
using the colour analyzer.
X=0.290 ± 0.015
Y=0.300 ± 0.015
Specifications are subject to change without prior notice.
MODEL DESTINATION (Operation Manual Languages)
21LT-45S: Deutsch, Français, Nederlands.
21LT-45SES: Español, Português.
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug
and power receptacle, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel.
3
21LT-45S
IMPORTANT SERVICING NOTES
Only qualified service personnel are allowed to carry out maintenance and repair of this receiver.
Servicing of High Voltage System and CRT
It is important that the static charge is removed from the high voltage system when carrying out work on the
receiver. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from the CRT
cavity connector to the CRT ground tag. This must be carried out with the AC supply disconnected from the
receiver.
Note the following:
• The CRT in this receiver employs Integral Implosion Protection.
• If the CRT has to be changed it MUST be replaced with the correct type for continued safe working.
• DO NOT lift the CRT by its neck.
• When handing the CRT, ensure that shatterproof goggles are worn.
• Ensure that the CRT is discharge before handling.
X-Ray
This receiver is designed to keep any x-ray emission to an absolute minimum. Some fault conditions and
servicing procedures may produce potentially hazardous x-ray radiation levels. This is a problem when in
close proximity to the receiver for long periods of time. To reduce any risks associated with this, please
observe the following precautions:
1. When undertaking any servicing on this chassis, DO NOT increase the EHT to more than 29.5 KV, (at a
instantaneous beam current of 1150 µA).
2. Ensure that during normal operation the EHT does not exceed 26.2 KV (at a beam current of 1150 µA).
This level has been preset in the factory. Always check that this level has not been exceeded after
carrying out any repair on the receiver.
3. DO NOT replace the CRT with any other type than that specified in the parts listing as this may cause
excessive x-ray radiation.
Before returning the receiver to the customer
In addition to the above checks, the following should also be carried out before returning the receiver to the
customer.
1. Inspect all the leads to ensure that they are dressed correctly and that they are not obstructed or pinched
by any other parts.
2. Ensure that all protective devices are in good condition. These will include nonmetallic control knobs,
insulating fish papers, cabinets backs, compartment covers or shields, mechanical insulators, etc.
4
21LT-45S
CONTROLS & TERMINALS
Speaker ( right)
= Power On / Off
= Volume -/+
CH
= Program -/+
MENU = Menu
REMOTE CONTROL
1
2
3
4
5
6
7
8
9
10
= Stand By
= Cursor Up
= Cursor Right
OK = OK
= Info (Program Menu)
0 - 9 = Direct Program
-/-- = Double Digit
= Wide mode button
P/CH+ = Program +
+ = Volume +
11
12
= TV / Quit Menu
= EXT button
(SCART, F- AV, RGB)
13 Yellow = Feature Menu
14 Blue = Installation Menu
EXT
15
= Hold
16
= Update
17
= Index Page
18
= Reveal
19
= Expand
20
= Mix
21
= Teletext
22
= Time
23 Red = Sound Menu
24 Green = Picture Menu
25
= Mute
26 I-II = Mono/Stereo - Dual I-II
27 = - Volume
28 - P/CH = -Program
29
= Flash back button
30 M = Menu
31
= Cursor Down
= Cursor Left
32
5
21LT-45S
CHASSIS LAYOUT
Mother Unit
CRT Unit
6
21LT-45S
21LT-45S PARTS LISTING
REPLACEMENT PARTS
Replacement parts which have special safety characteristics are identified in
this manual. Electrical components having such features are identified by
in the Replacement Parts Listing.
The use of a substitute replacement part which does not have the same safety
characteristics as the factory recommended is not permitted.
Replacement parts not shown in this service manual may create shock fire, or
other hazards.
HOW TO ORDER REPLACEMENT PARTS
To have your order completed promptly and correctly please supply the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO. (*)
4. DESCRIPTION
5. CODE
6. QUANTITY
(*) When ordering any part, a “V” should be added before the Part No.
REF No.
!
!
!
(*)
PARTS
DESCRIPTION
SN CODE
EX CODE
BQ
AG
CG
AS
30002749
30028645
PICTURE TUBE
21" CPT TUBE SAFE
21" DEG COIL&EARTH CB. SAFE WO/UL SHARP
TU201
30009637
TUNER
TUNER WSP (PLL) 38.9 MK2 - BATCH
AR
BC
IC101
IC118
IC401
IC403
IC502
IC600
IC800
IC801
IC803
IC804
IC806
30018063
30001506
30013986
30026922
30001669
30015306
30011968
30015087
30001500
30001622
30014346
INTEGRATED CIRCUITS
IC HT48RA0A OTP
IC TL431
IC AAMP TDA7266L 5W SIP10
IC STV2248H (SHRINK56)
PREAMPLIFIER TFMS1380
IC TDA8174AW
IC SMPS MC44608 DIP8
IC SAFE OPTOCOUPLER TCET1102G
IC LM7808
IC 7805 (1A)
IC 78L05 TO-92 (100mA)
AF
AC
AD
AR
AD
AD
AF
AA
AC
AB
AA
AR
AH
AM
BC
AM
AN
AQ
AE
AH
AF
AE
Q100
Q601
Q804
30001453
30013656
30001454
TRANSISTORS
TR BC337
TR POWER STX112-AP
TR BC548B
AA
AA
AA
AC
AE
AC
D100
D106
D407
D505
D506
D509
D602
D608
D609
D610
D614
D800
D801
D802
D803
D804
D805
D806
D808
D809
D811
D813
D837
D838
D889
D890
D893
D894
D900
D901
D902
D903
D904
D905
D906
30002733
30001377
30001284
30001284
30001284
30001279
30001329
30001318
30001318
30001318
30001318
30001318
30001347
30001318
30001315
30001318
30001315
30001315
30007681
30001329
30001329
30001329
30001329
30001329
30001384
30001329
30001318
30001318
30001318
30001318
30001318
30001344
30001349
30001349
30001349
DIODES
LED INFRARED IR333
DIODE ZENER 33V UZT 33B
DIODE 1N4148 0.15A/100V 0.5A
DIODE 1N4148 0.15A/100V 0.5A
DIODE 1N4148 0.15A/100V 0.5A
LED RED/GREEN LTL293SJ
DIODE 1N4007 1A/1000V 30A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE ZENER 8.2V
DIODE BA159 1A/800V 20A
DIODE BYD33D 1A/200V 20A
DIODE BA159 1A/800V 20A
DIODE BYD33D 1A/200V 20A
DIODE BYD33D 1A/200V 20A
DIODE UF5407 3A/800V 150A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
TR MCR22-6
DIODE 1N4007 1A/1000V 30A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE ZENER 6.2V 1/2W
DIODE ZENER 11V
DIODE ZENER 11V
DIODE ZENER 11V
AA
AB
AA
AA
AA
AC
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AC
AF
AB
AB
AB
AH
AB
AB
AB
AB
AB
AB
AB
AB
AE
AB
AE
AE
AF
AB
AB
AB
AB
AB
AG
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
X100
X401
X402
X403
X501
30002852
30001749
30015592
30000074
30002851
PACKAGED CIRCUITS
XTAL REZ 455KHZ
XTAL 4.433619 MHZ (AK15)
XTAL 3.579545 (WO/LOAD CAP)
CAP MKT 100NF 63V J
XTAL 4MHZ L.C=30PF
AA
AC
AB
AA
AC
AD
AK
AG
AC
AH
L101
L110
L111
30013412
30013412
30013412
COILS
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
AA
AA
AA
AA
AA
AA
.
.
!
!
!
!
!
!
!
7
REF No.
L112
L113
L114
L201
L210
L211
L401
L402
L403
L404
L406
L407
L601
L603
L802
L803
L805
L806
L807
PARTS
30013412
30013412
30013412
30001979
30001971
30001971
30001971
30001992
30001971
30001990
30001971
30002002
30001990
30002149
30001971
30001984
30001971
30001971
30001992
Z401
Z402
Z403
Z404
30001707
30001690
30001728
30001724
TR601
TR801
TR802
C100
C108
C201
C205
C300
C302
C404
C409
C410
C411
C413
C416
C417
C419
C420
C422
C423
C424
C431
C433
C436
C440
C443
C444
C446
C460
C502
C513
C519
C531
C536
C541
C542
C543
C603
C604
C608
C610
C611
C613
C615
C616
C618
C619
C624
C627
C628
C631
C632
C633
C634
C635
C636
C641
C643
C644
C645
C801
C802
C803
C805
C806
C808
C809
DESCRIPTION
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FIXED COIL 1UH Q45 M-A
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
FIXED COIL 10UH Q65 K-A
FERRITE BEAT (805) BLM21A601S
.
FERRITE BEAT (805) BLM21A601S
FIXED COIL 47UH Q60 K
FIXED COIL 6.8UH Q75 K
LINEARITY COIL 50UH (06-06A)
FERRITE BEAT (805) BLM21A601S
FIXED COIL 2.2UH Q55 M-AX
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
SN CODE
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AE
AA
AA
AA
AA
AA
EX CODE
AA
AA
AA
AB
AD
AD
AD
AB
AD
AB
AD
AB
AB
AN
AD
AB
AD
AD
AB
CERAMIC FILTERS
FILTER SAW L9453M
FILTER SAW K2962M
TRIPLE TRAP TPT02B
FILTER SER TRAP TPS 5.5MHZ
AH
AH
AG
AB
AU
AU
AT
AF
30017788
30002100
30027706
TRANSFORMERS
TRF FBT SAFE 90ø (AK30,AK36 LAYER TYPE)
LINE FILTER SAFE 2*27MH
TRF SMPS AK44 90° (170-270V) Audio=12V
AT
AC
AF
BE
AH
AQ
30000352
30000371
30000400
30000371
30000400
30000092
30000225
30000345
30000384
30000345
30000362
30000362
30000362
30000413
30000100
30000400
30000400
30000345
30000362
30000345
30000109
30000074
30000362
30000384
30000345
30000345
30000396
30000371
30000352
30000384
30000074
30000109
30000205
30000205
30000384
30000345
30000107
30000355
30000092
30000078
30000359
30000352
30007100
30000131
30000350
30000154
30018380
30000410
30000100
30016085
30000409
30000100
30000387
30000345
30000116
30000362
30000352
30000094
30000094
30000433
30018085
30000433
30000295
30000420
CAPACITORS
CAP EL 100UF 16V M
CAP EL 22UF 50V M
CAP EL 47UF 50V M
CAP EL 22UF 50V M
CAP EL 47UF 50V M
CAP MKT 220NF 63V J
CAP CER 220PF 50V J SL
CAP EL 10UF 50V M
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP EL 1UF 50V M
CAP EL 1UF 50V M
CAP EL 1UF 50V M
CAP EL 4.7UF 50V M
CAP MKT 330NF 63V J
CAP EL 47UF 50V M
CAP EL 47UF 50V M
CAP EL 10UF 50V M
CAP EL 1UF 50V M
CAP EL 10UF 50V M
CAP MKT 470NF 63V J
CAP MKT 100NF 63V J
CAP EL 1UF 50V M
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP EL 10UF 50V M
CAP EL 47UF 16V M
CAP EL 22UF 50V M
CAP EL 100UF 16V M
CAP EL 2.2UF 50V M
CAP MKT 100NF 63V J
CAP MKT 470NF 63V J
CAP CER 150PF 50V J SL
CAP CER 150PF 50V J SL
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP MKT 47NF 250V J
CAP EL 100UF 50V M
CAP MKT 220NF 63V J
CAP MKT 1UF 100V M
CAP EL 1000UF 16V M
CAP EL 100UF 16V M
CAP MKP SAFE 10NF 1600V %3.5
CAP MKP SAFE 100NF 250V J
CAP EL 10UF 250V M
CAP MKP SAFE 390NF 250V J
CAP EL 3.3UF 160V M 105°
CAP EL 470UF 50V M
CAP MKT 330NF 63V J
CAP EL 10UF 63V 105°
CAP EL 470UF 25V M
CAP MKT 330NF 63V J
CAP EL 33UF 50V M
CAP EL 10UF 50V M
CAP MKT 68NF 63V J
CAP EL 1UF 50V M
CAP EL 100UF 16V M
CAP MKT SAFE 220NF 275V M AC
CAP MKT SAFE 220NF 275V M AC
CAP CER 1NF 1KV M B
CAP VAR SAFE 510V K MFCN14D511
CAP CER 1NF 1KV M B
CAP CER 100NF 50V Z F
CAP EL 150UF 400V M
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AB
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AF
AB
AB
AB
AB
AB
AD
AB
AB
AB
AB
AB
AB
AB
AB
AD
AB
AB
AB
AB
AB
AD
AC
AB
AB
AB
AB
AB
AB
AB
AB
AC
AD
AB
AB
AB
AB
AD
AB
AD
AF
AC
AB
AE
AB
AD
AG
AB
AF
AD
AB
AD
AD
AB
AB
AC
AB
AB
AB
AB
AB
AD
AB
AB
AQ
21LT-45S
!
!
!
!
!
REF No.
C810
C811
C813
C816
C817
C822
C824
C827
C828
C829
C830
C832
C833
C834
C836
C838
C839
C840
C843
C848
C849
C850
C855
C858
C862
C864
C907
C908
C912
PARTS
30000387
30000161
30000295
30000440
30000198
30007308
30009208
30000411
30000295
30000359
30000382
30000295
30000407
30000295
30000431
30000352
30000352
30000352
30000431
30000352
30000352
30000352
30000407
30007308
30000367
30000440
30000434
30000415
30000075
DESCRIPTION
CAP EL 33UF 50V M
CAP MKP SAFE 47NF 630V J
CAP CER 100NF 50V Z F
CAP CER SAFE 2.2NF 4KV M
CAP CER 120PF 500V J SL
CAP CER 220PF 1KV K (PULSE)
CAP CER 470PF 1KV K (PULSE)
CAP EL 4700UF 16V M
CAP CER 100NF 50V Z F
CAP EL 1000UF 16V M
CAP EL 2200UF 16V M
CAP CER 100NF 50V Z F
CAP EL 470UF 16V M
CAP CER 100NF 50V Z F
CAP CER 100PF 1KV M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP CER 100PF 1KV M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 470UF 16V M
CAP CER 220PF 1KV K (PULSE)
CAP EL 1UF 250V M
CAP CER SAFE 2.2NF 4KV M
CAP CER 1NF 2KV K B
CAP EL 4.7UF 250V M
CAP MKT 100NF 250V K (DC)
R105
R127
R128
R204
R206
R301
R302
R407
R410
R420
R424
R428
R437
R438
R442
R450
R469
R507
R508
R510
R513
R514
R518
R525
R527
R534
R535
R536
R546
R559
R562
R601
R602
R605
R623
R625
R627
R628
R630
R631
R633
R637
R638
R639
R645
R646
R647
R648
R649
R650
R654
R655
R658
R659
R662
R663
R801
R804
R805
R806
R807
R810
R811
R813
30000792
30000459
30000471
30000459
30000459
30000471
30000471
30000590
30000471
30000466
30000712
30000792
30000466
30000466
30000466
30000712
30000670
30000466
30000622
30000737
30000459
30000459
30000471
30000583
30000718
30000526
30000718
30000471
30000560
30000470
30000471
30000477
30000513
30000477
30000607
30000900
30000910
30000650
30000828
30000885
30000706
30000621
30000589
30000718
30001126
30000500
30000466
30001215
30000801
30000744
30000705
30000705
30001077
30001123
30000712
30000459
30000982
30000504
30000843
30000982
30001130
30001257
30000594
30000718
RESISTORS
RES CF 1/4W 75R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 100R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 10K J
RES CF 1/4W 2.2K J
RES CF 1/4W 10K J
RES CF 1/4W 1K J
RES CF 1/4W 470R J
RES CF 1/4W 75R J
RES CF 1/4W 1K J
RES CF 1/4W 1K J
RES CF 1/4W 1K J
RES CF 1/4W 470R J
RES CF 1/4W 330K J
RES CF 1/4W 1K J
RES CF 1/4W 270R J
RES CF 1/4W 5.1K J
RES CF 1/4W 100R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 220R J
RES CF 1/4W 4.7K J
RES CF 1/4W 1.5K J
RES CF 1/4W 4.7K J
RES CF 1/4W 10K J
RES CF 1/4W 1.8K J
RES CF 1/2W 10K J
RES CF 1/4W 10K J
RES CF 1/4W 100K J
RES CF 1/4W 130K J
RES CF 1/4W 100K J
RES CF 1/4W 2.2R J
RES MF 1/4W 1.8K J
RES MF 1/2W 1.8R G
RES CF 1/4W 33R J
RES CF 1/4W 8.2M J
RES MF 1/4W 1.5K J
RES CF 1/4W 47R J
RES CF 1/2W 270R J
RES CF 1/2W 2.2K J
RES CF 1/4W 4.7K J
RES MO 3W 2.2K J
RES CF 1/4W 12K J
RES CF 1/4W 1K J
RES FUSE SAFE 1W 1R J
RES CF 1/4W 7.5K J
RES CF 1/4W 560R J
RES CF 1/2W 47R J
RES CF 1/2W 47R J
RES MO 2W 10R J
RES MO 2W 220R J
RES CF 1/4W 470R J
RES CF 1/4W 100R J
RES MF 1/4W 4.7K J
RES CF 1/4W 120K J
RES MF 1/4W 10R J
RES MF 1/4W 4.7K J
RES MO 1/2W 0.22R J
RES MG SAFE 1/2W 4.7M J
RES CF 1/4W 22K J
RES CF 1/4W 4.7K J
SN CODE
AA
AB
AA
AA
AA
AA
AA
AC
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
EX CODE
AB
AE
AB
AC
AB
AD
AC
AH
AB
AC
AF
AB
AC
AB
AC
AB
AB
AB
AC
AB
AB
AB
AC
AD
AB
AC
AB
AC
AD
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
AB
AB
AB
AB
AC
AA
AB
AB
AB
AC
AC
AB
AB
AA
AB
AA
AA
AB
AD
AB
AB
!
REF No.
R815
R817
R818
R819
R821
R828
R829
R836
R900
R901
R902
R903
R904
R905
R906
R919
PARTS
30000452
30001037
30000925
30000810
30000470
30001265
30000718
30001224
30006712
30006712
30006712
30000886
30000886
30000886
30000525
30001213
DESCRIPTION
RES CF 1/4W 10R J
RES MF 1/4W 99K F
RES MF 1/4W 2.2K F
RES CF 1/4W 820R J
RES CF 1/2W 10K J
NTC MONITOR 10R/3A SCK-103
RES CF 1/4W 4.7K J
RES FUSE SAFE 1/2W 0.22R J
FERRITE BEAD 3.5X4.7X0.8
FERRITE BEAD 3.5X4.7X0.9
FERRITE BEAD 3.5X4.7X0.10
RES MF 1/4W 1.5K F
RES MF 1/4W 1.5K F
RES MF 1/4W 1.5K F
RES CF 1/2W 1.5K J
RES FUSE 1/4W 1R J
20000848
30015053
30001829
30006709
30001783
30009085
30019101
30001827
30006660
30001792
30001795
30016695
30016694
30001855
30000428
30000428
30000428
30016022
30016022
30016022
30016022
30016022
30017848
30001268
30014048
20092581
20141421
20141673
20144876
20144877
20151171
20151304
20157066
20069673
30001386
30001448
30001731
30001793
30006987
30007248
30009366
30009783
30009784
30014568
30017855
30018423
30025172
30027392
30027706
30028208
35000136
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
F801
PL101
PL302
PL405
PL501
PL503
PL504
PL601
PL602
PL801
PL802
PL900
PL902
!
PL903
SG900
SG901
SG902
SW506
SW507
SW508
SW509
SW510
!
SW801
!
TH800
VL405
.
.
.
.
.
.
.
.
!
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
! .
.
!
!
8
SN CODE
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
EX CODE
AB
AB
AB
AB
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
MISCELLANEOUS PARTS
FUSE ASSY.TK79-A (2.5A)
SOCKET SCART NEW TYPE
CONN HEADER 2P 2.5MM TOP WHT SD
CONN HEADER 5P 2.5MM TOP WHT SD
CONN HEADER 5P 2.5MM TOP BD
CABLE 1P R2.6 35 W/CLIPS
CABL 1P/350 DIS UL1672AWG22
CONN HEADER 4P 5/7.5MM TOP WHT
CONN HEADER 4P 2.5MM TOP WHT SD
CONN HEADER 2P 7.5MM TOP WHT
CONN HEADER 3P 5/7.5MM TOP WHT
CNAS 5P/450 FLT W/C+CBLH UL2468AWG24
CNAS 4P/450 FLT W/C+CBLH UL2468AWG24
SOCKET CRT SAFE NARROWNECK W/GND
SPARK GAP 300V
SPARK GAP 300V
SPARK GAP 300V
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH SAFE ON/OFF 4A/128A JVC
THERMISTOR 3P
ADJ.COIL VIF 44MHZ Q=64 C=39pF
CABLE ASSY.4/45 (HRZ&VER) IMPROVED NEW
CRT B.ASSY.TP44-RF/SF (AK44)
CRT B.ASSY.TP44-OTO RF/SF (AK44)
CHS.ASSY.44-521B2111132229
IC 24C08 U00615010210121102
SPK.AS.2162 SHARP (R) (AK44)
POWER CORD ASSY.(2.4MT W/FTZ)(AK44SHARP)
PR.IC.36/44-SHARP 36_44_A17
FIRE BARRIER (I) (NATURAL-V.O.)(AK30)
TR MTP6N60E (PLASTIC)
TR BU808DFI
FUSE SAFE 2.5A 250V 5*20MM
CONN HOUSING 2P 7.5MM TOP
IC 24C08 (WP)
CONN HOUSING 4P 3.96MM TOP WHT
DIODE UF5402 3A/200V 150A
SOCKET IC 56P (SHRINK)
SOCKET IC 8P (DIP)
TERMINAL SSC 2000T
CONN.ASSY.4/45 (HRZ&VER) IMPROVED NEW
CNAS 2P/500 SIS W/BLK C+FER UL1007AWG24
IC TDA6107JF/N3
SPEAKER 16R 4W F/R 50x90MM-21" SF SHARP
TRF SMPS AK44 90° (170-270V) Audio=12V
POWER CORD SAFE EURO 2.2M SHARP W/FILTER
FUSE HOLDER TK79-A (GRAY)
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AD
AB
AB
AB
AA
AA
AA
AA
AA
AC
AD
AA
AB
AQ
AD
BK
AA
AE
AD
AT
AA
AE
AF
AA
AA
AC
AA
AB
AC
AA
AA
AB
AB
AF
AE
AF
AG
AA
AD
AF
AB
AB
AC
AC
AB
AD
AB
AC
AC
AE
AE
AM
AG
AG
AG
AB
AB
AB
AB
AB
AH
AM
AE
AF
BA
AN
CA
AE
AN
AM
BE
AC
AP
AQ
AC
AD
AH
AB
AF
AH
AB
AB
AF
AF
AQ
AN
AQ
AT
AD
20141194
20143026
35000158
35000165
35000180
35000181
35000182
35000224
35004572
35005084
35008081
40016815
50048040
50048254
ARTWORK
SCR.ASSY.2162 (1SP)
R/C 1548 SHARP (EKO2GRAY/I) (GRAY/S)
NUT C ZN BOTTOM M3
KNURL WASHER C ZNSY 3*6*04 (M3)
SCREW C ZN YSMB M3*6
SCREW C ZN YSMB M3*8
SCREW C ZN YSMB M3*10
SCREW C SK ZN YFMB 2.9*9.5
SCREW P C AgSYF YSB 4x20
SCREW C ZN RYAKB 6x30
SCREW P C ZN YFMB 3*9.5
LOGO SHARP (D.C.-SILVER)21"SF SHARP
LABEL EHT/27.8KV BEAM/1150UA(GER)
I/B SHARP 21LT45S P/AK44/1548/GER/DUT/FR
AB
AM
AA
AA
AA
AA
AA
AA
AA
AA
AA
AC
AA
AE
AF
AY
AB
AB
AA
AB
AA
AB
AB
AB
AA
AH
AB
AQ
20140407
20141195
20146643
40012331
40016859
COSMETICS
BACK CVR.2162SF EKO2GRAY (I) (AK44)
BUTTON ASSY 2162 (SILVER/O.BLUE)
FRONT 2162 W/H SLV285S(P)(PW/S) 1SPK
RUBBER PAD (RC 1542)
RUBBER WASHER 2163RF (I) SHARP
AR
AD
AS
AE
AA
BB
AN
BD
AP
AB
21LT-45S
21LT-45SES PARTS LISTING
REPLACEMENT PARTS
Replacement parts which have special safety characteristics are identified in
this manual. Electrical components having such features are identified by
in the Replacement Parts Listing.
The use of a substitute replacement part which does not have the same safety
characteristics as the factory recommended is not permitted.
Replacement parts not shown in this service manual may create shock fire, or
other hazards.
HOW TO ORDER REPLACEMENT PARTS
To have your order completed promptly and correctly please supply the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO. (*)
4. DESCRIPTION
5. CODE
6. QUANTITY
(*) When ordering any part, a “V” should be added before the Part No.
REF No.
!
!
!
(*)
PARTS
DESCRIPTION
SN CODE
EX CODE
BQ
AG
CG
AS
30002749
30028645
PICTURE TUBE
21" CPT TUBE SAFE
21" DEG COIL&EARTH CB. SAFE WO/UL SHARP
TU201
30009637
TUNER
TUNER WSP (PLL) 38.9 MK2 - BATCH
AR
BC
IC101
IC118
IC401
IC403
IC502
IC600
IC800
IC801
IC803
IC804
IC806
30018063
30001506
30013986
30026922
30001669
30015306
30011968
30015087
30001500
30001622
30014346
INTEGRATED CIRCUITS
IC HT48RA0A OTP
IC TL431
IC AAMP TDA7266L 5W SIP10
IC STV2248H (SHRINK56)
PREAMPLIFIER TFMS1380
IC TDA8174AW
IC SMPS MC44608 DIP8
IC SAFE OPTOCOUPLER TCET1102G
IC LM7808
IC 7805 (1A)
IC 78L05 TO-92 (100mA)
AF
AC
AD
AR
AD
AD
AF
AA
AC
AB
AA
AR
AH
AM
BC
AM
AN
AQ
AE
AH
AF
AE
Q100
Q601
Q804
30001453
30013656
30001454
TRANSISTORS
TR BC337
TR POWER STX112-AP
TR BC548B
AA
AA
AA
AC
AE
AC
D100
D106
D407
D505
D506
D509
D602
D608
D609
D610
D614
D800
D801
D802
D803
D804
D805
D806
D808
D809
D811
D813
D837
D838
D889
D890
D893
D894
D900
D901
D902
D903
D904
D905
D906
30002733
30001377
30001284
30001284
30001284
30001279
30001329
30001318
30001318
30001318
30001318
30001318
30001347
30001318
30001315
30001318
30001315
30001315
30007681
30001329
30001329
30001329
30001329
30001329
30001384
30001329
30001318
30001318
30001318
30001318
30001318
30001344
30001349
30001349
30001349
DIODES
LED INFRARED IR333
DIODE ZENER 33V UZT 33B
DIODE 1N4148 0.15A/100V 0.5A
DIODE 1N4148 0.15A/100V 0.5A
DIODE 1N4148 0.15A/100V 0.5A
LED RED/GREEN LTL293SJ
DIODE 1N4007 1A/1000V 30A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE ZENER 8.2V
DIODE BA159 1A/800V 20A
DIODE BYD33D 1A/200V 20A
DIODE BA159 1A/800V 20A
DIODE BYD33D 1A/200V 20A
DIODE BYD33D 1A/200V 20A
DIODE UF5407 3A/800V 150A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
DIODE 1N4007 1A/1000V 30A
TR MCR22-6
DIODE 1N4007 1A/1000V 30A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE BA159 1A/800V 20A
DIODE ZENER 6.2V 1/2W
DIODE ZENER 11V
DIODE ZENER 11V
DIODE ZENER 11V
AA
AB
AA
AA
AA
AC
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AC
AF
AB
AB
AB
AH
AB
AB
AB
AB
AB
AB
AB
AB
AE
AB
AE
AE
AF
AB
AB
AB
AB
AB
AG
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
X100
X401
X402
X403
X501
30002852
30001749
30015592
30000074
30002851
PACKAGED CIRCUITS
XTAL REZ 455KHZ
XTAL 4.433619 MHZ (AK15)
XTAL 3.579545 (WO/LOAD CAP)
CAP MKT 100NF 63V J
XTAL 4MHZ L.C=30PF
AA
AC
AB
AA
AC
AD
AK
AG
AC
AH
L101
L110
L111
30013412
30013412
30013412
COILS
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
AA
AA
AA
AA
AA
AA
.
.
!
!
!
!
!
!
!
9
REF No.
L112
L113
L114
L201
L210
L211
L401
L402
L403
L404
L406
L407
L601
L603
L802
L803
L805
L806
L807
PARTS
30013412
30013412
30013412
30001979
30001971
30001971
30001971
30001992
30001971
30001990
30001971
30002002
30001990
30002149
30001971
30001984
30001971
30001971
30001992
Z401
Z402
Z403
Z404
30001707
30001690
30001728
30001724
TR601
TR801
TR802
C100
C108
C201
C205
C300
C302
C404
C409
C410
C411
C413
C416
C417
C419
C420
C422
C423
C424
C431
C433
C436
C440
C443
C444
C446
C460
C502
C513
C519
C531
C536
C541
C542
C543
C603
C604
C608
C610
C611
C613
C615
C616
C618
C619
C624
C627
C628
C631
C632
C633
C634
C635
C636
C641
C643
C644
C645
C801
C802
C803
C805
C806
C808
C809
DESCRIPTION
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FERRITE BEAD (0805) MMZ2012Y152B
FIXED COIL 1UH Q45 M-A
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
FIXED COIL 10UH Q65 K-A
FERRITE BEAT (805) BLM21A601S
.
FERRITE BEAT (805) BLM21A601S
FIXED COIL 47UH Q60 K
FIXED COIL 6.8UH Q75 K
LINEARITY COIL 50UH (06-06A)
FERRITE BEAT (805) BLM21A601S
FIXED COIL 2.2UH Q55 M-AX
FERRITE BEAT (805) BLM21A601S
FERRITE BEAT (805) BLM21A601S
SN CODE
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AE
AA
AA
AA
AA
AA
EX CODE
AA
AA
AA
AB
AD
AD
AD
AB
AD
AB
AD
AB
AB
AN
AD
AB
AD
AD
AB
CERAMIC FILTERS
FILTER SAW L9453M
FILTER SAW K2962M
TRIPLE TRAP TPT02B
FILTER SER TRAP TPS 5.5MHZ
AH
AH
AG
AB
AU
AU
AT
AF
30017788
30002100
30027706
TRANSFORMERS
TRF FBT SAFE 90ø (AK30,AK36 LAYER TYPE)
LINE FILTER SAFE 2*27MH
TRF SMPS AK44 90° (170-270V) Audio=12V
AT
AC
AF
BE
AH
AQ
30000352
30000371
30000400
30000371
30000400
30000092
30000225
30000345
30000384
30000345
30000362
30000362
30000362
30000413
30000100
30000400
30000400
30000345
30000362
30000345
30000109
30000074
30000362
30000384
30000345
30000345
30000396
30000371
30000352
30000384
30000074
30000109
30000205
30000205
30000384
30000345
30000107
30000355
30000092
30000078
30000359
30000352
30007100
30000131
30000350
30000154
30018380
30000410
30000100
30016085
30000409
30000100
30000387
30000345
30000116
30000362
30000352
30000094
30000094
30000433
30018085
30000433
30000295
30000420
CAPACITORS
CAP EL 100UF 16V M
CAP EL 22UF 50V M
CAP EL 47UF 50V M
CAP EL 22UF 50V M
CAP EL 47UF 50V M
CAP MKT 220NF 63V J
CAP CER 220PF 50V J SL
CAP EL 10UF 50V M
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP EL 1UF 50V M
CAP EL 1UF 50V M
CAP EL 1UF 50V M
CAP EL 4.7UF 50V M
CAP MKT 330NF 63V J
CAP EL 47UF 50V M
CAP EL 47UF 50V M
CAP EL 10UF 50V M
CAP EL 1UF 50V M
CAP EL 10UF 50V M
CAP MKT 470NF 63V J
CAP MKT 100NF 63V J
CAP EL 1UF 50V M
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP EL 10UF 50V M
CAP EL 47UF 16V M
CAP EL 22UF 50V M
CAP EL 100UF 16V M
CAP EL 2.2UF 50V M
CAP MKT 100NF 63V J
CAP MKT 470NF 63V J
CAP CER 150PF 50V J SL
CAP CER 150PF 50V J SL
CAP EL 2.2UF 50V M
CAP EL 10UF 50V M
CAP MKT 47NF 250V J
CAP EL 100UF 50V M
CAP MKT 220NF 63V J
CAP MKT 1UF 100V M
CAP EL 1000UF 16V M
CAP EL 100UF 16V M
CAP MKP SAFE 10NF 1600V %3.5
CAP MKP SAFE 100NF 250V J
CAP EL 10UF 250V M
CAP MKP SAFE 390NF 250V J
CAP EL 3.3UF 160V M 105°
CAP EL 470UF 50V M
CAP MKT 330NF 63V J
CAP EL 10UF 63V 105°
CAP EL 470UF 25V M
CAP MKT 330NF 63V J
CAP EL 33UF 50V M
CAP EL 10UF 50V M
CAP MKT 68NF 63V J
CAP EL 1UF 50V M
CAP EL 100UF 16V M
CAP MKT SAFE 220NF 275V M AC
CAP MKT SAFE 220NF 275V M AC
CAP CER 1NF 1KV M B
CAP VAR SAFE 510V K MFCN14D511
CAP CER 1NF 1KV M B
CAP CER 100NF 50V Z F
CAP EL 150UF 400V M
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AA
AA
AA
AA
AB
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AF
AB
AB
AB
AB
AB
AD
AB
AB
AB
AB
AB
AB
AB
AB
AD
AB
AB
AB
AB
AB
AD
AC
AB
AB
AB
AB
AB
AB
AB
AB
AC
AD
AB
AB
AB
AB
AD
AB
AD
AF
AC
AB
AE
AB
AD
AG
AB
AF
AD
AB
AD
AD
AB
AB
AC
AB
AB
AB
AB
AB
AD
AB
AB
AQ
21LT-45S
!
!
!
!
!
REF No.
C810
C811
C813
C816
C817
C822
C824
C827
C828
C829
C830
C832
C833
C834
C836
C838
C839
C840
C843
C848
C849
C850
C855
C858
C862
C864
C907
C908
C912
PARTS
30000387
30000161
30000295
30000440
30000198
30007308
30009208
30000411
30000295
30000359
30000382
30000295
30000407
30000295
30000431
30000352
30000352
30000352
30000431
30000352
30000352
30000352
30000407
30007308
30000367
30000440
30000434
30000415
30000075
DESCRIPTION
CAP EL 33UF 50V M
CAP MKP SAFE 47NF 630V J
CAP CER 100NF 50V Z F
CAP CER SAFE 2.2NF 4KV M
CAP CER 120PF 500V J SL
CAP CER 220PF 1KV K (PULSE)
CAP CER 470PF 1KV K (PULSE)
CAP EL 4700UF 16V M
CAP CER 100NF 50V Z F
CAP EL 1000UF 16V M
CAP EL 2200UF 16V M
CAP CER 100NF 50V Z F
CAP EL 470UF 16V M
CAP CER 100NF 50V Z F
CAP CER 100PF 1KV M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP CER 100PF 1KV M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 100UF 16V M
CAP EL 470UF 16V M
CAP CER 220PF 1KV K (PULSE)
CAP EL 1UF 250V M
CAP CER SAFE 2.2NF 4KV M
CAP CER 1NF 2KV K B
CAP EL 4.7UF 250V M
CAP MKT 100NF 250V K (DC)
R105
R127
R128
R204
R206
R301
R302
R407
R410
R420
R424
R428
R437
R438
R442
R450
R469
R507
R508
R510
R513
R514
R518
R525
R527
R534
R535
R536
R546
R559
R562
R601
R602
R605
R623
R625
R627
R628
R630
R631
R633
R637
R638
R639
R645
R646
R647
R648
R649
R650
R654
R655
R658
R659
R662
R663
R801
R804
R805
R806
R807
R810
R811
R813
30000792
30000459
30000471
30000459
30000459
30000471
30000471
30000590
30000471
30000466
30000712
30000792
30000466
30000466
30000466
30000712
30000670
30000466
30000622
30000737
30000459
30000459
30000471
30000583
30000718
30000526
30000718
30000471
30000560
30000470
30000471
30000477
30000513
30000477
30000607
30000900
30000910
30000650
30000828
30000885
30000706
30000621
30000589
30000718
30001126
30000500
30000466
30001215
30000801
30000744
30000705
30000705
30001077
30001123
30000712
30000459
30000982
30000504
30000843
30000982
30001130
30001257
30000594
30000718
RESISTORS
RES CF 1/4W 75R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 100R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 10K J
RES CF 1/4W 2.2K J
RES CF 1/4W 10K J
RES CF 1/4W 1K J
RES CF 1/4W 470R J
RES CF 1/4W 75R J
RES CF 1/4W 1K J
RES CF 1/4W 1K J
RES CF 1/4W 1K J
RES CF 1/4W 470R J
RES CF 1/4W 330K J
RES CF 1/4W 1K J
RES CF 1/4W 270R J
RES CF 1/4W 5.1K J
RES CF 1/4W 100R J
RES CF 1/4W 100R J
RES CF 1/4W 10K J
RES CF 1/4W 220R J
RES CF 1/4W 4.7K J
RES CF 1/4W 1.5K J
RES CF 1/4W 4.7K J
RES CF 1/4W 10K J
RES CF 1/4W 1.8K J
RES CF 1/2W 10K J
RES CF 1/4W 10K J
RES CF 1/4W 100K J
RES CF 1/4W 130K J
RES CF 1/4W 100K J
RES CF 1/4W 2.2R J
RES MF 1/4W 1.8K J
RES MF 1/2W 1.8R G
RES CF 1/4W 33R J
RES CF 1/4W 8.2M J
RES MF 1/4W 1.5K J
RES CF 1/4W 47R J
RES CF 1/2W 270R J
RES CF 1/2W 2.2K J
RES CF 1/4W 4.7K J
RES MO 3W 2.2K J
RES CF 1/4W 12K J
RES CF 1/4W 1K J
RES FUSE SAFE 1W 1R J
RES CF 1/4W 7.5K J
RES CF 1/4W 560R J
RES CF 1/2W 47R J
RES CF 1/2W 47R J
RES MO 2W 10R J
RES MO 2W 220R J
RES CF 1/4W 470R J
RES CF 1/4W 100R J
RES MF 1/4W 4.7K J
RES CF 1/4W 120K J
RES MF 1/4W 10R J
RES MF 1/4W 4.7K J
RES MO 1/2W 0.22R J
RES MG SAFE 1/2W 4.7M J
RES CF 1/4W 22K J
RES CF 1/4W 4.7K J
SN CODE
AA
AB
AA
AA
AA
AA
AA
AC
AA
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
EX CODE
AB
AE
AB
AC
AB
AD
AC
AH
AB
AC
AF
AB
AC
AB
AC
AB
AB
AB
AC
AB
AB
AB
AC
AD
AB
AC
AB
AC
AD
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
AB
AB
AB
AB
AC
AA
AB
AB
AB
AC
AC
AB
AB
AA
AB
AA
AA
AB
AD
AB
AB
!
REF No.
R815
R817
R818
R819
R821
R828
R829
R836
R900
R901
R902
R903
R904
R905
R906
R919
PARTS
30000452
30001037
30000925
30000810
30000470
30001265
30000718
30001224
30006712
30006712
30006712
30000886
30000886
30000886
30000525
30001213
DESCRIPTION
RES CF 1/4W 10R J
RES MF 1/4W 99K F
RES MF 1/4W 2.2K F
RES CF 1/4W 820R J
RES CF 1/2W 10K J
NTC MONITOR 10R/3A SCK-103
RES CF 1/4W 4.7K J
RES FUSE SAFE 1/2W 0.22R J
FERRITE BEAD 3.5X4.7X0.8
FERRITE BEAD 3.5X4.7X0.9
FERRITE BEAD 3.5X4.7X0.10
RES MF 1/4W 1.5K F
RES MF 1/4W 1.5K F
RES MF 1/4W 1.5K F
RES CF 1/2W 1.5K J
RES FUSE 1/4W 1R J
20000848
30015053
30001829
30006709
30001783
30009085
30019101
30001827
30006660
30001792
30001795
30016695
30016694
30001855
30000428
30000428
30000428
30016022
30016022
30016022
30016022
30016022
30017848
30001268
30014048
20092581
20141421
20141673
20144876
20144877
20151171
20151304
20157066
20069673
30001386
30001448
30001731
30001793
30006987
30007248
30009366
30009783
30009784
30014568
30017855
30018423
30025172
30027392
30027706
30028208
35000136
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
F801
PL101
PL302
PL405
PL501
PL503
PL504
PL601
PL602
PL801
PL802
PL900
PL902
!
PL903
SG900
SG901
SG902
SW506
SW507
SW508
SW509
SW510
!
SW801
!
TH800
VL405
.
.
.
.
.
.
.
.
!
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
! .
.
!
!
10
SN CODE
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
EX CODE
AB
AB
AB
AB
AA
AB
AB
AB
AB
AB
AB
AB
AB
AB
AB
AA
MISCELLANEOUS PARTS
FUSE ASSY.TK79-A (2.5A)
SOCKET SCART NEW TYPE
CONN HEADER 2P 2.5MM TOP WHT SD
CONN HEADER 5P 2.5MM TOP WHT SD
CONN HEADER 5P 2.5MM TOP BD
CABLE 1P R2.6 35 W/CLIPS
CABL 1P/350 DIS UL1672AWG22
CONN HEADER 4P 5/7.5MM TOP WHT
CONN HEADER 4P 2.5MM TOP WHT SD
CONN HEADER 2P 7.5MM TOP WHT
CONN HEADER 3P 5/7.5MM TOP WHT
CNAS 5P/450 FLT W/C+CBLH UL2468AWG24
CNAS 4P/450 FLT W/C+CBLH UL2468AWG24
SOCKET CRT SAFE NARROWNECK W/GND
SPARK GAP 300V
SPARK GAP 300V
SPARK GAP 300V
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH TACT VERTICAL T&R
SWITCH SAFE ON/OFF 4A/128A JVC
THERMISTOR 3P
ADJ.COIL VIF 44MHZ Q=64 C=39pF
CABLE ASSY.4/45 (HRZ&VER) IMPROVED NEW
CRT B.ASSY.TP44-RF/SF (AK44)
CRT B.ASSY.TP44-OTO RF/SF (AK44)
CHS.ASSY.44-521B2111132229
IC 24C08 U00615010210121102
SPK.AS.2162 SHARP (R) (AK44)
POWER CORD ASSY.(2.4MT W/FTZ)(AK44SHARP)
PR.IC.36/44-SHARP 36_44_A17
FIRE BARRIER (I) (NATURAL-V.O.)(AK30)
TR MTP6N60E (PLASTIC)
TR BU808DFI
FUSE SAFE 2.5A 250V 5*20MM
CONN HOUSING 2P 7.5MM TOP
IC 24C08 (WP)
CONN HOUSING 4P 3.96MM TOP WHT
DIODE UF5402 3A/200V 150A
SOCKET IC 56P (SHRINK)
SOCKET IC 8P (DIP)
TERMINAL SSC 2000T
CONN.ASSY.4/45 (HRZ&VER) IMPROVED NEW
CNAS 2P/500 SIS W/BLK C+FER UL1007AWG24
IC TDA6107JF/N3
SPEAKER 16R 4W F/R 50x90MM-21" SF SHARP
TRF SMPS AK44 90° (170-270V) Audio=12V
POWER CORD SAFE EURO 2.2M SHARP W/FILTER
FUSE HOLDER TK79-A (GRAY)
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AB
AA
AD
AB
AB
AB
AA
AA
AA
AA
AA
AC
AD
AA
AB
AQ
AD
BK
AA
AE
AD
AT
AA
AE
AF
AA
AA
AC
AA
AB
AC
AA
AA
AB
AB
AF
AE
AF
AG
AA
AD
AF
AB
AB
AC
AC
AB
AD
AB
AC
AC
AE
AE
AM
AG
AG
AG
AB
AB
AB
AB
AB
AH
AM
AE
AF
BA
AN
CA
AE
AN
AM
BE
AC
AP
AQ
AC
AD
AH
AB
AF
AH
AB
AB
AF
AF
AQ
AN
AQ
AT
AD
20141194
20143026
35000158
35000165
35000180
35000181
35000182
35000224
35004572
35005084
35008081
40016815
50048040
50048254
ARTWORK
SCR.ASSY.2162 (1SP)
R/C 1548 SHARP (EKO2GRAY/I) (GRAY/S)
NUT C ZN BOTTOM M3
KNURL WASHER C ZNSY 3*6*04 (M3)
SCREW C ZN YSMB M3*6
SCREW C ZN YSMB M3*8
SCREW C ZN YSMB M3*10
SCREW C SK ZN YFMB 2.9*9.5
SCREW P C AgSYF YSB 4x20
SCREW C ZN RYAKB 6x30
SCREW P C ZN YFMB 3*9.5
LOGO SHARP (D.C.-SILVER)21"SF SHARP
LABEL EHT/27.8KV BEAM/1150UA(GER)
I/B SHARP 21LT45S P/AK44/1548/GER/DUT/FR
AB
AM
AA
AA
AA
AA
AA
AA
AA
AA
AA
AC
AA
AE
AF
AY
AB
AB
AA
AB
AA
AB
AB
AB
AA
AH
AB
AQ
20140407
20141195
20146643
40012331
40016859
COSMETICS
BACK CVR.2162SF EKO2GRAY (I) (AK44)
BUTTON ASSY 2162 (SILVER/O.BLUE)
FRONT 2162 W/H SLV285S(P)(PW/S) 1SPK
RUBBER PAD (RC 1542)
RUBBER WASHER 2163RF (I) SHARP
AR
AD
AS
AE
AA
BB
AN
BD
AP
AB
21LT-45S
How to update the Technical Information appeared on this Service Manual
1. Web site: https://www.vestelservice.com
2. Select: Technical Support
3. Login: 101278
4. Password: SHPII278
By this access you can consult the latest schematic diagram or request the Parts Listing of a concrete Production
Date / Serial Number.
By this way it can be also consulted the issued Technical Reports (Service Bulletins).
11
21LT-45S
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
Technical information and Production:
Vestel Electronik AS
PRINTED BY:
ON:
Think Ecology, please use
Technical information re-issued:
SHARP ELECTRONICA ESPAÑA S.A.
Service Manual Group
Engineering Dept.
Polígono Industrial Can Sant Joan
08190 Sant Cugat del Vallès
Barcelona
Spain
RECYCLED PAPER
12
AK - 44
CHASSIS
SERVICE MANUAL
SE00AK44CHA00
Issued: 9th March 2004
PAL B/G, I / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION
CHASSIS
AK-44
In the interests of user safety (required by safety
regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.
CONTENTS
TABLE OF CONTENTS ....................................................................................................... 3
INTRODUCTION .................................................................................................................. 6
CIRCUIT DESCRIPTIONS ................................................................................................... 6
INTEGRATED CIRCUIT DESCRIPTIONS ....................................................................... 13
BLOCK DIAGRAM ................................................................................................................ 22
SERVICE MODE ADJUSTMENTS ...................................................................................... 23
HOTEL MODE FUNCTIONS ................................................................................................ 30
CIRCUIT DIAGRAMS ..................................................................................................... 31
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 41
SHARP CORPORATION
1
This document has been published to
be used for after sales service only.
AK - 44
CHASSIS
SERVICE MANUAL UPDATE LOG SHEET
Technical Report No.
Technical Bulletin No.
Cause / Solution
Part No.
Page No.
Application
Data /Serial No.
Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc.
If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
If you need more information, please refer to the Technical Report (Bulletin).
2
AK - 44
CHASSIS
TABLE OF CONTENTS
SAFETY PRECAUTIONS ............................................................................................................................................... 5
TV set switched off ............................................................................................................................................... .....5
Measurements ....................................................................................................................................................... 5
PERI-TV SOCKET ........................................................................................................................................................... 5
SCART 1........................................................................................................................................................................... 5
1. INTRODUCTION ......................................................................................................................................................... 6
CIRCUIT DESCRIPTIONS ............................................................................................................................................. 6
2. SMALL SIGNAL PART WITH STV2248 ..................................................................................................................... 6
2.1 Vision IF amplifier ........................................................................................................................................... 6
2.2 QSS Sound circuit (QSS versions) ................................................................................................................. 6
2.3 AM Demodulator ........................................................................................................................................... 6
2.4 FM demodulator and audio amplifier (mono versions) .................................................................................. 6
2.5 Video switch ................................................................................................................................................... 6
2.6 Synchronisation circuit .........................................................................................................................................6
2.7 Chroma and luminance processing ................................................................................................................ 7
2.8 RGB output circuit .......................................................................................................................................... 7
2.9 µ-Controller .................................................................................................................................................... 8
2.9.1 Controls .............................................................................................................................................. 8
2.9 .2 Teletext ............................................................................................................................................. 8
2.10 Video Path ..................................................................................................................................................... 9
2.11 Sound Path .................................................................................................................................................. 9
2.12 AV Input Signal Path ..................................................................................................................................... 9
2.12.1 Video and Sound ............................................................................................................................ 9
2.12.2 RGB ................................................................................................................................................ 9
3. TUNER ....................................................................................................................................................................... 9
4. DIGITAL TV SOUND PROCESSOR MSP34X0 ........................................................................................................ 10
5. SOUND OUTPUT STAGE TDA7266L/TDA7266 ...................................................................................................... 10
6. VERTICAL OUTPUT STAGE WITH TDA8174A ....................................................................................................... 10
7. VIDEO OUTPUT AMPLIFIER TDA6107 ................................................................................................................... 11
8. POWER SUPPLY (SMPS) .......................................................................................................................................... 11
8.1 Start Up ......................................................................................................................................................... 11
8.2 Voltage Regulation .......................................................................................................................................... 11
8.3 Voltage Protection .......................................................................................................................................... 11
8.4 Current Regulation .......................................................................................................................................... 11
8.5 Standby operation .......................................................................................................................................... 12
8.6 Mode transition ............................................................................................................................................. 12
8.7 SMPS Switch Off .......................................................................................................................................... 12
9. LINE CIRCUIT ............................................................................................................................................................ 12
9.1 B.C.L. Circuit (Beam Current Limiter) ........................................................................................................... 13
10. SERIAL ACCESS CMOS 8K EEPROM 24C08 ...................................................................................................... 13
11. SAW FILTERS .......................................................................................................................................................... 13
12. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ..................................................................................... 13
ST92195 ................................................................................................................................................................ 14
STV224X ............................................................................................................................................................... 15
UV1315, UV1316, UV1336 .................................................................................................................................. 15
TDA7266/TDA7266L .......................................................................................................................................... 17
TDA8174 ..................................................................................................................................................................18
TDA6107 ................................................................................................................................................................ 18
MC44608 .................................................................................................................................................................19
MSP34X0G ..............................................................................................................................................................19
24C08 .................................................................................................................................................................... 20
3
AK - 44
CHASSIS
TDA1308 ................................................................................................................................................................ 21
SAW FILTERS ....................................................................................................................................................... 21
13. GENERAL BLOCK DIAGRAM of 11AK44 ..................................................................................................................22
14. SERVICE MENU ...................................................................................................................................................... 23
14.1 Service Menu entrance ................................................................................................................................ 23
14.2 Service Adjustments ................................................................................................................................... 23
14.3 Using Coloured Buttons .............................................................................................................................. 24
14.3.1 AVL ............................................................................................................................................... 24
14.3.2 Geometry Menu ............................................................................................................................. 25
14.3.2.1 Geometry Table ................................................................................................................ 25
14.3.2.1 Geometry Table ................................................................................................................ 25
14.3.3 Screen Adjustment ...................................................................................................................... 26
14.3.4 IF Adjustment ................................................................................................................................ 26
14.4 Auto Programming System Set Up ............................................................................................................. 25
15. OPTIONS ................................................................................................................................................................... 27
15.1 Service Registers updating regarding the Tuner ...................................................................................... 27
15.2 Registers details ......................................................................................................................................... 28
16. LANGUAGES ......................................................................................................................................................... 30
17. HOTEL MODE FUNCTIONS ................................................................................................................................... 30
18. SCHEMATIC DIAGRAMS ........................................................................................................................................ 31
19. HOW TO UPDATE THE TECHNICAL INFORMATION ........................................................................................ 41
4
AK - 44
CHASSIS
SAFETY PRECAUTIONS
The service of this TV set must be carried out by qualified persons only. Components marked with the warning symbol
on the circuit diagram or on the Parts Listing, are critical for safety and must only be replaced with an identical component.
- Power resistor and fused resistors must be mounted in an identical manner to the original component.
- When servicing this TV, check that the EHT does not exceed 26kV.
TV set switched off:
Make short-circuit between HV-CRT clip and CRT ground layer.
Short C809 before changing IC800 and IC801 or other components in primary side of the SMPS part.
Do not try to test Q801 gate source junction if C809 is charged, your meter will turn on the transistor which will discharge
the capacitor resulting in a drain source short circuit. Do not discharge C809 quickly with a screwdriver etc. The very
high current produced can damage the internal connections of the capacitor causing failure at a later date. Remember
when checking voltages to use a return path on the same side of TR802 for the Voltmeter earth to obtain the correct
readings.
Measurements:
Voltage readings and oscilloscope traces are measured under the following conditions:
Antenna signal’s level is 60dB at the color bar pattern from the TV pattern generator. (100% white, 75% color saturation)
Brightness, contrast, and color are adjusted for normal picture performance.
Mains supply, 220VAC, 50Hz.
DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCHED OFF
The mains supply part of the switch mode power supply’s transformer is live.
Use an isolating transformer.
The receiver complies with the safety requirements.
PERI-TV SOCKET
21 19 17 15 13 11
9
7
2
4
6
8
20 18 16 14 12 10
5
3
21
1
SCART PINING
1 Audio right output 0.5 Vrms / 1K
2 Audio right input 0.5 Vrms / 10K
3 Audio left output 0.5 Vrms / 1K
4 Ground AF
5 Ground Blue
6 Audio left input 0.5 Vrms / 10K
7 Blue input 0.7 Vpp / 75 ohm
8 AV switching input 0-12 VDC / 10 K
9 Ground Green
10 11 Green input 0.7 Vpp / 75 ohm
12 13 Ground Red
14 Ground Blanking
15 Red input 0.7 Vpp / 75 ohm
16 Blanking input 0-0.4 VDC, 1-3 VDC / 75 Ohm
17 Ground CVBS output
18 Ground CVBS input
19 CVBS output 1 Vpp / 75 ohm
20 CVBS input 1 Vpp / 75 ohm
21 Ground
5
AK - 44
CHASSIS
1. INTRODUCTION
11AK44 is a 90° chassis capable of driving 20"/21" tubes at the appropriate currents. The chassis is capable of operating
in PAL, SECAM and NTSC standards. The sound system is capable of giving 4 watts RMS output into a load of 16
ohms. 7 page SIMPLETEXT is provided. The chassis is equipped with a single-deck 21 pin Scart connector.
CIRCUIT DESCRIPTIONS
2. SMALL SIGNAL PART WITH STV2248
STV2248 video processor is essential for realizing all small signal functions for a color TV receiver.
2.1 Vision IF amplifier
The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely
alignment-free. Although the VCO (Toko-coil) of the PLL circuit is external, yet the frequency is fixed to the required
value by the original manufacturer thus the Toko-coil does not need to be adjusted manually. The setting of the various
frequencies (38.9 or 33,8 MHz) can be made via changing the coil itself.
2.2 QSS Sound circuit (QSS versions)
The sound IF amplifier is similar to the vision IF amplifier and has an external AGC de-coupling capacitor. The single
reference QSS mixer is realised by a multiplier. In this multiplier the SIF signal is converted to the inter-carrier frequency
by mixing it with the regenerated picture carrier from the VCO. The mixer output signal is supplied to the output via a
high-pass filter for attenuation of the residual video signals. With this system a high performance hi-fi stereo sound
processing can be achieved. The AM sound demodulator is realised by a multiplier. The modulated
sound IF signal is multiplied in phase with the limited SIF signal. The demodulator output signal is supplied to the output
via a low-pass filter for attenuation of the carrier harmonics. The AM signal is supplied to the output via the volume
control.
2.3 AM Demodulator
The AM demodulated signal results from multiplying the input signal by itself, it is available on AM/FM output.
2.4 FM demodulator and audio amplifier (mono versions)
The FM demodulator is realized as narrow-band PLL with external loop filter, which provides the necessary selectivity
without using an external band-pass filter. To obtain a good selectivity a linear phase detector and constant input signal
amplitude are required. For this reason the inter-carrier signal is internally supplied to the demodulator via a gain
controlled amplifier and AGC circuit. The nominal frequency of the demodulator is tuned to the required frequency (4.5/
5.5/6.0/6.5 MHz) by means of a calibration circuit that uses the clock frequency of the µ-controller/Teletext decoder as
a reference. The setting to the wanted frequency is realized by means of the software. It can be read whether the PLL
frequency is inside or outside the window and whether the PLL is in lock or not.
With this information it is possible to make an automatic search system for the incoming sound frequency. This is
realized by means of a software loop that alternate the demodulator to various frequencies, then select the frequency
on which a lock condition has been found. De-emphasis output signal amplitude is independent of the TV standard and
has the same value for a frequency
deviation of ±25 kHz at the 4.5 MHz standard and for a deviation of ±50 kHz for the other standards. When the IF circuit
is switched to positive modulation the internal signal on deemphasis pin is automatically muted. The audio control
circuit contains an audio switch and volume control. In the mono inter-carrier sound versions the Automatic Volume
Leveling (AVL) function can be activated. The pin to which the external capacitor has to be connected depends on the
IC version. For the 90° types the capacitor is connected to the EW output pin (pin 20). When the AVL is active it
automatically stabilizes the audio output signal to a certain level.
2.5 Video switching
The video processor (STV2248C) has three CVBS inputs and two RGB inputs. The first CVBS input is used for external
CVBS from SCART 1, the second is used for external CVBS from FAV, and the third one is used for internal video. The
selection between both external video inputs signals is realized by means of software and hardware switches.
2.6 Synchronization circuit
The video processor (STV224X) performs the horizontal and vertical processing. The external horizontal deflection
circuit is controlled via the Horizontal output pulse (HOUT). The vertical scanning is performed through an external
ramp generator and a vertical power amplifier IC controlled by the Vertical output pulse (VOUT).
The main components of the deflection circuit are:
• PLL1: the first phase locked loop that locks the internal line frequency reference on the CVBS input signal. It is
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CHASSIS
composed of an integrated VCO (12 MHz) that requires the chroma Reference frequency (4.43 MHz or 3.58 MHz
crystal oscillator reference signal), a divider by 768, a line decoder, and a phase comparator.
• PLL2: The second phase locked loop that controls the phase of the horizontal output (Compensation of horizontal
deflection transistor storage time variation). Also the horizontal position adjustment is also performed in PLL2.
• A vertical pulse extractor.
• A vertical countdown system to generate all vertical windows (vertical synchronization window, frame blanking pulses,
50/60 Hz identification window...).
• Automatic identification of 50/60 Hz scanning.
• PLL1 time constant control.
• Noise detector, video identification circuits, and horizontal coincidence detector.
• Vertical output stage including de-interlace function, vertical position control.
• Vertical amplitude control voltage output (combined with chroma reference output and Xtal 1 indication).
2.7 Chroma and luminance processing
The chroma decoder is able to demodulate PAL, NTSC and SECAM signals.
The decoder dedicated to PAL and NTSC sub-carrier is based on a synchronous demodulator, and an Xtal PLL locked
on the phase reference signal (burst).
The SECAM demodulation is based on a PLL with automatic calibration loop.
The color standard identification is based on the burst recognition.
Automatic and forced modes can be selected through the I2C bus.
NTSC tint, and auto flesh are controlled through I2C bus.
Xtal PLL can handle up to 3 crystals to work in PAL M, PAL N and NTSC M for South America.
ACC an ACC overload control the chroma sub-carrier amplitude within 26dB range. Both ACCs are based on digital
systems and do not need external capacitor.
All chroma filters are fully integrated and tuned via a PLL locked on Xtal VCO signal.
A second PLL is used for accurate fine-tuning of the SECAM bell filter. This tuning is achieved during the frame blanking.
An external capacitor memorizes the bell filter tuning voltage.
A base-band chroma delay-line rebuilds the missing color line in SECAM and removes transmission phase errors in
PAL.
The base-band chroma delay line is clocked with 6 MHz signal provided by the horizontal scanning VCO.
The luminance processor is composed of a chroma trap filter, a luminance delay line, a peaking function with noise
coring feature, a black stretch circuit.
Trap filter and luminance delay lines are achieved with the use of bi-quad integrated filters, autoaligned via a master
filter phase locked loop.
2.8 RGB output circuit
The video processor performs the R, G, B processing.
There are three sources:
1. Y, U, V inputs (coming from luma part (Y output), and chroma decoder outputs (R-Y, B-Y outputs).
2. External R, G, B inputs from SCART (converted internally in Y, U, V), with also the possibility to input YUV
signals from a DVD player, (YUV specification is Y= 0.7 V PP , U= 0.7 V PP , V = 0.7 V PP for 100% color
bar).
3. Internal R, G, B inputs (for OSD and Teletext display)
The main functions of the video part are:
- Y, U, V inputs with integrated clamp loop, allowing a DC link with YUV outputs,
- External RGB inputs (RGB to YUV conversion), or direct YUV inputs,
- Y, U, V switches,
- Contrast, saturation, brightness controls,
- YUV to RGB matrix,
- OSD RGB input stages (with contrast control),
- RGB switches,
- APR function,
- DC adjustment of red and green channels,
- Drive adjustments (R, G, B gain),
- Digital automatic cut-off loop control,
- Manual cut-off capability with I2C adjustments,
- Half tone, oversize blanking, external insertion detection, blue screen,
- Blanking control and RGB output stages.
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2.9 µ-Controller
The ST92195 is the micro-controller, which is required for a color TV receiver. ST92195D1 is the version with one page
Teletext and ST92195D7 is the one with 7 page Teletext. The IC has the supply voltage of 5 V and they are mounted in
PSDIP package with 56 pins.
µ-Controller has the following features
- Display of the program number, channel number, TV Standard, analogue values, sleep timer, parental control and
mute is done by OSD
- Single LED for stand-by and on mode indication
- System configuration with service mode
- 3 level logic output for SECAM and Tuner band switching
IC 501 controls all the functions of the receiver operated by the remote control and the front panel customer controls. It
produces the on screen graphics, operates tuning, customers controls and engineering controls, and also incorporates
all of the Teletext functions. It also controls the video processor, the audio processor, and the tuner. The circuits just
mentioned are controlled via the I²C bus. Also IC501 controls the video source switching, vertical position adjustment
and the vertical linearity adjustment via its ports.
An external 8K EEPROM is used by the micro. The EEPROM comes fully programmed. The main clock oscillator is 4.0
MHz crystal X501 on pins 50 and 51. Reset is provided on pin 2 via Q504. On switching on pin 2 becomes high and the
controller gets reset which stays valid till a low signal comes on that pin.
2.9.1 Controls
Command information from the infrared remote controller is fed through the sensor IC502 to pin 1 of the microprocessor. Operation of the customer front panel keys is detected by pin 8 that is an ADC (analogue to digital
converter). Pressing a switch will connect the 5V to the ground through a particular resistor that determines the
value of the voltage on pin8 at that instant. This obtained value is comprehended by the micro and the corresponding operation is performed. Refer to the following table:
Button
Theoretical voltage
Resistance
P+
3.0V
R502
P-
4.0V
R503
V+
2.0V
R504
V-
1.5V
R506
Menu
1.0V
R505
IC501 automatically switches from TV mode to AV1 by detecting the signal from or pin8 at the Scart connector,
through it 56 pins. The picture mode is determined according to the following table:
Direct Voltage
Picture mode
0~2V
TV
4,5 ~ 7 V
16 :9
9,5 ~ 12 V
4 :3
2.9.2 Teletext
The microprocessor IC501 performs all of the Teletext functions internally. The Composite blanking video and
Sync signal (CBVS) is input to pin 33 of the micro from pin 29 of IC403. When text is selected the text graphics
are output as R.G.B signals on pins 15/16/17 of the micro and fed to pins 34/35/36 of IC403. At the same time
pin 18 of the micro goes high taking pin 37 of IC403 high, blanking the picture and selecting text R.G.B. input.
Note: mixed mode is available and fast text with 8-page memory.
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CHASSIS
2.10 Video Path
The detected video signal is output from pins 18 of IC403, to sound traps Z403/404. The video is taken from the other
side via the appropriate filter to Pin 18 of IC403. (1.2 p to p) Video to the Scart connectors is taken after R458 to Pin 19
of the Scart connector. The CVBS_TXT output Pin29 output is fed to IC501 Pin 34 (for Teletext). The video signal is
sometimes labelled CVBS on the circuit diagram. This stands for Composite Video Blanking & Sync.
The composite signal is input Pin 13 (Video input) of IC403. This IC carries out all of the luma/Chroma processing
internally and also provides the customer control functions of brightness, contrast, sharpness and saturation. IC403 is
I²C bus controlled and incorporates auto greyscale circuitry and internal luma/chroma delay lines. The resulting R.G.B
drive is output on pins 30,31 and 32. The R.G.B passes via connector PL405 to the CRT base PCB. Here the R.G.B
signal is amplified by IC901 to provide drive for the cathodes of the CRT. IC901 produces a feedback signal, which is
fed to IC403 (pin 33) for blanking and auto greyscale correction.
2.11 Sound Path
The demodulated mono sound is taken from pin 55 of IC403 directly to the sound output stage IC401 Pin 7. The output
signal from IC401 is Volume controlled achieved within IC403 using the I²C bus line from IC501. To limit the volume at
the specified out put the A_out pin 55 is fed to IC 401 through a voltage divider R455 and R454. Muting of the output
stage is provided from Pin 46 of IC501 to pin3 of IC401/6 of IC301.
IN the stereo model the IF from PINS 10 & 11 of the tuner passes through Z401 and the output signal goes through pins
1&2 of IC403. The output QSS signal from IC 403 is taken from pin 11 and sent to audio processor IC700. The left
channel is output on PIN 29 and the right channel output is on PIN 28. Then to IC301 after passing through a voltage
divider R454/R455 for the right channel and R463/R464 for the left channel.
IC403 handles also the AM modulated signals in L/L’ systems at pins 1&2.
2.12 AV Input Signal Path
2.12.1 Video and Sound
IC403 has three CVBS inputs at pins 18,20 and 22.The composite video signal of AV1 is taken from pin 20 of the
Scart connector to pin 20 of IC403. The mono sound signal is taken from pins 2 and 6 of the Scart sockets to the
switching transistors Q101. The transistor switches the audio depending on the source, and is then fed to pin14 of
lC403.
When AV input is selected pin 5,6,7 of the microprocessor IC50I is taken high, this switches the IC403 to external
input mode via I²C BUS. This connects the video inputs on pins 20 or 22 to IC403 and the audio input on pin 14 to
the audio out on pin 55 (via the internal volume control circuit) The signal paths are then as for videopath.
The chassis can detect the video signals on Scart using pin 8 switching voltage at pin 56 of IC501.
2.12.2 R.G.B
The R.G.B signals from pins 7,11 and 15 of the Scart connector are fed to the R.G.B input pins (25,26,27) of
IC403.
R.G.B operation can be enabled by either taking pin 16 of the Scart connector high, this high is fed to Pin 28 of
IC403, or via the l²C bus the microprocessor sets IC403 to forced R.G.B mode in which the video processor
generates its own fast blank signal. This puts the IC into external R.G.B mode and selects the inputs on pins 25,26
and 27, overriding the video input on pin 20/22.
Note: when using R.G.B input the contrast, brightness and colour controls will still operate.
3. TUNER
Either a PLL or a VST tuner is used as a tuner.
UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV 1336 is used as the PLL
tuner. UV 1315 (VHF/UHF) is used as a VST Tuner.
Channel coverage of UV1316
BAND
Low Band
Mid Band
High Band
OFF-AIR CHANNELS
FREQUENCY
CHANNELS
RANGE (MHz)
E2 to C
48.25 to 82.25 (1)
E5 to E12
175.25 to 224.25
E21 to E69
471.25 to 855.25 (2)
CABLE CHANNELS
FREQUENCY
CHANNELS
RANGE (MHz)
S01 to S08
69.25 to 154.25
S09 to S38
161.25 to 439.25
S39 to S41
447.25 to 463.25
(1). Enough margin is available to tune down to 45.25 MHz.
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(2). Enough margin is available to tune up to 863.25 MHz.
Noise
Low band:
Mid band:
High band:
Typical
5 dB
5dB
6 dB
Max.
9 dB
9 dB
9 dB
Gain
All channels:
Gain Taper (of-air channels):
Min.
38 dB
Typical
44 dB
Max.
52 dB
8 dB
Channel Coverage UV1336
BAND
CHANNELS
FREQUENCY
RANGE (MHz)
Low Band
Mid Band
High Band
2 to D
E to PP
QQ to 69
55.25 to 139.25
145.25 to 391.25
397.25 to 801.25
Noise is typically 6 dB for all channels. Gain is minimum 38 dB and maximum 50 dB for all
channels.
Channel Coverage of UV1315
BAND
Low Band
Mid Band
High Band
OFF-AIR CHANNELS
FREQUENCY
CHANNELS
RANGE (MHz)
E2 to C
48.25 to 82.25 (1)
E5 to E12
175.25 to 224.25
E21 to E69
471.25 to 855.25 (2)
CABLE CHANNELS
FREQUENCY
CHANNELS
RANGE (MHz)
S01 to S10
69.25 to 168.25
S11 to S39
231.25 to 447.25
S40 to S41
455.25 to 463.25
(1). Enough margin is available to tune down to 45.25 MHz.
(2). Enough margin is available to tune up to 863.25 MHz.
Noise
Low band
Mid band
High band
Typ. Max.
6 dB 9 dB
6 dB 10 dB
6 dB 11 dB
Gain
Min.
All Channels
38 dB
Gain Taper
(off-air channels)
Typ.
44 dB
Max.
50 dB
8 dB
4. DIGITAL TV SOUND PROCESSOR MSP34X0
The MSP 34x0G is designed to perform demodulation of FM or AM-Mono TV sound.
Alternatively, two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be
processed with the MSP 34x0G. Only the MSP 3410 does digital demodulation and decoding of NICAM-coded TV
stereo sound. The MSP 34x0G offers a powerful feature to calculate the carrier field strength which can be used for
automatic standard detection (terrestrial) and search algorithms (satellite).
5. SOUND OUTPUT STAGE TDA7266L/TDA7266
TDA7266L is used as the AF output amplifier for mono applications. It is supplied by +12 VDC coming from a separate
winding in the SMPS transformer. An output power of 4 W (THD = 0.5 %) can be delivered into an 16 ohm load.
TDA7266 is used as the AF output amplifier for stereo applications. It is supplied by +12 VDC coming from a separate
winding in the SMPS transformer. An output power of 2*4W (THD = 0.5 %) can be delivered into an 16 ohm load.
6. VERTICAL OUTPUT STAGE WITH TDA8174A
The TDA8174A is a power amplifier circuit for use in 90° and 110° color deflection systems for 25 to 200 Hz field
frequencies, and for 4 : 3 and 16 : 9 picture tubes.
IC403 generates a vertical pulse signal VER_OUT and V_AMP that are fed to IC600 (the vertical stage IC). IC600 is
supplied by a 26V DC via diode D610. It generates its own ramp signal and based on the V_AMP & VER_OUT signals
it produces the vertical deflection signals that are fed to connector PL601. Vertical linearity adjustment is controlled by
Q604, which is driven by the PWM output of IC501 at pin 49. Vertical position adjustment is conducted by Q606 derived
by the VER_OUT signal. Switching Q606 will change the DC voltage on VOUT_2 pin, which will either lower or higher
the picture. A DC level is supplied at VOUT_2 via D614 to stabilise the picture and make its position changeable.
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7. VIDEO OUTPUT AMPLIFIER TDA6107JF/N3
The TDA6107JF includes three video output amplifiers and is intended to drive the three cathodes of a colour CRT
directly. The device is contained in a plastic DIL-bent-SIL 9-pin medium power (DBS9MPF) package, and uses highvoltage DMOS technology. To obtain maximum performance, the amplifier should be used with black-current control.
8. POWER SUPPLY (SMPS)
The DC voltage required at various parts of the chassis are provided by an SMPS transformer controlled by the IC
MC44608 which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer produces
126 V (Flat models) or 116 V (non Flat models) for FBT input, +/- 14 V for audio output IC, S + 3.3, S + 5 V and 8 V for
ST92195.
The ZX series of receivers incorporate a Motorola switch mode power supply using a MC 44608 regulator controller
IC. The circuit provides power to the receiver in both standby and normal operation modes.
8.1 Start Up
The switch on the mains supply is fed through the mains filter network TR801, the surge limiter resistor R828, the bridge
rectifier diodes D811/13/37/38, and reservoir capacitor producing approx. 320 volts D.C. to feed the switching MOSFET
Q801 via the primary winding of TR802 pins 6 and 7.
Start up resistor R801 feeds from a 500V coming from the mains through the adder diodes D809, D890 to pin 8 of
IC800, the IC uses 9mA current source and connects it internally to VCC at pin6 allowing a rapid charge enough for
start up. Then IC800 responds with the oscillator starting to oscillate at a 40 KHz frequency fixed by the IC manufacturer.
The IC then produces, pulse width modulation pulses, at this frequency on pin 5 to drive the base of the switching FET
Q801, that will then switch current on and off through the primary of TR802, which will in turn provides voltages in the
secondary windings. The secondary winding voltages being proportional to the length of time that Q801 is turned on in
each cycle. The voltage produced between pins 4 and 3 of TR802 is rectified by D804 developing aprox. 12 volts on
C810, which takes over from the start up resistor to supply pin 8 of IC800.
The Demag pin at pin1 offers 3 different functions: Zero voltage crossing detection (50mV), 24mA current detection and
120mA current detection. The 24mA level is used to detect the secondary reconfiguration status and the 120mA level
to detect an Over Voltage status called Quick OVP.
The VCC at pin6 operates between 6,6V and 13V in normal operation, when this voltage exceeds 15V then the IC
output is disabled.
8.2 Voltage Regulation
After initial start up the secondary voltages of TR802 are established. These voltages then need to be regulated to the
required levels. In a switch mode power supply such as this, it is the ON time of the switching FET Q801 that determines
the output voltages produced. To provide regulation of the supply there is a feedback loop via an adjustable zener
IC118 and an OPTO- coupler connected to pin3 of IC800. The reference voltage of IC118 is set to 2,5V to supply a B+
voltage of 115V. Any fluctuation at this pin will cause IC800 to compensate it either by increasing or decreasing the
voltage at the secondary outputs.
8.3 Voltage Protection
The MC44608 offers two OVP functions:
1- A fixed function that detects when V CC is higher than 15.4V
2- A programmable function that uses the demag pin. The current flowing into the demag pin is mirrored and compared
to the reference current Iovp (120mA). -Thus this OVP is quicker than normal number one as it directly senses the
change in current rather than waiting for a specific voltage value, and is called QOVP. In both cases, once an OVP
condition is detected, the output is latched off until a new circuit START–UP.
3- A software controlled function acts on pin52 of IC501. This pin monitors feedback from both 8V and 5V via D512,
then compares these to a reference value Vref pre-set by the hardware through resistors R545, R546, R548. In normal
mode operation 1.2V < Vref < 2.4V. Any voltage outside this window will cause the micro controller to force the TV to
stand by mode by lowering the standby port. Refer to standby mode.
8.4 Current Protection
To monitor the current drawn by the receiver the source of Q801 is returned to the bridge rectifier through a low value
resistor R807. All the current drawn by the receiver will flow through that resistor each time Q801 conducts; this will
produce a voltage across the resistors proportional to the current drawn by the receiver. This voltage is fed to pin 2 of
IC800 via R806. When the receiver is working normally the voltage across R807 is only a fraction of a volt and is not
large enough to have any effect on IC800. Under fault conditions, if the receiver draws excessive current the voltage
across R807 will rise. This voltage is monitored by the current sense input pin2.
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CHASSIS
This Current Sense pin senses the voltage developed on the series resistor R806 inserted in the source of the power
MOSFET. When I sense reaches 1V, the Driver output (pin 5) is disabled. This is known as the Over Current Protection
function. A 200mA current source is flowing out of the pin 3 during the start–up phase and during the switching phase
in case of the Pulsed Mode of operation. A resistor can be inserted between the sense resistor and the pin 3, thus a
programmable peak current detection can be performed during the SMPS stand–by mode.
8.5 Standby Operation
As mentioned earlier the Start–up Management of MC44608 is as follows:
The Vi pin 8 of IC800 is directly connected to the HV DC rail Vin. This high voltage current source is internally connected
to the VCC pin and thus issued to charge the VCC capacitor. The V CC capacitor charge period corresponds to the
Start–up phase. When the V CC voltage reaches 13V, the high voltage 9mA current source is disabled and the device
starts working. The device enters into the switching phase.
To help increase the application safety against high voltage spike on pin8 a small wattage 1k _ series resistor is inserted
between the Vin rail and pin 8. After this start-up the IC can distinguish between the different modes of operation using
the following technique:
8.6 Mode Transition
The LW latch is the memory of the working status at the end of every switching sequence. Two different cases must be
considered for the logic at the termination of the SWITCHING PHASE:
1. No Over Current was observed
2. An Over Current was observed
These two cases correspond to the two signals “NOC” in case of “No Over Current” and “OC” in case of Over Current.
The effective working status at the end of the ON time memorized in LW corresponds to Q=1 for no over current, and
Q=0 for over current.
To enter the standby mode secondary side is reconfigured using D889 loop, this starts with the microprocessor ‘s pin 47
becomes high; as the standby port becomes high Q503 conducts and Q802 becomes off then D889 conducts and the
high voltage output value becomes lower than the NORMAL mode regulated value. The shunt regulator IC118 is fully
OFF. In the SMPS stand–by mode all the SMPS outputs are lowered except for the low voltage output that supply the
wake–up circuit located at the isolated side of the power supply. In that mode the secondary regulation is performed by
the Zener diode (D801) connected in parallel to the TL431. The secondary reconfiguration status can be detected on
the SMPS primary side by measuring the voltage level at pin4 of TR802.
In the SMPS stand–by mode the 3 distinct phases are:
The SWITCHING PHASE: Similar to the Overload mode. The current sense clamping level is reduced. When VCC
crosses the current sense section, the C.S. clamping level depends on the power to be delivered to the load during the
SMPS stand–by mode. Every switching sequence ON/OFF is terminated by an OC as long as the secondary Zener
diode voltage has not been reached. When the Zener voltage is reached the ON cycle is terminated by a true PWM
action. The proper SWITCHING PHASE termination must correspond to a NOC condition. The LW latch stores this
NOC status. The LATCHED OFF PHASE: The MODE latch is set.
The START–UP PHASE is similar to the Overload Mode. The MODE latch remains in its set status (Q=1).
The SWITCHING PHASE: The Stand-by signal is validated and the 200uA is sourced out of the Current Sense pin 2.
8.7 SMPS Switch Off
When the mains is switched OFF, so long as the electrolytic bulk capacitor provides energy to the SMPS the controller
remains in the switching phase. Then the peak current reaches its maximum peak value, the switching frequency
decreases and all the secondary voltages are reduced. The V CC voltage is also reduced. When VCC is less than 6,5V,
the SMPS stops working
9. LINE CIRCUIT
Line and frame drive are generated by IC403. The sync pulses are separated from the incoming video signal at pin 18/
20/22 and used to control the internal circuitry of the IC. Line drive is produced by counting down the external 4.43 MHz
crystal at pin 40 to 15.625 KHz locked to the incoming sync. This drive is output on pin 48 and feeds directly to the line
drive transistor Q601. Note. That the output of IC403 Pin 48 is an open-collector and requires a pull up resistor, if the pin
is open circuited for test no waveform will be seen. Q601 collector feeds the line output transistor Q603.
The line output stage is conventional with a transformer containing a split diode winding for EHT generation. Fifth
harmonic tuning is achieved by capacitor C618/619.
A fly-back pulse is taken from pin 1 of the FBT transformer. This is required by IC403 (Pin 49) for burst / sync gating, and
RGB line blanking. The ver_sync signal is output from the pin47 and fed to Pin41 of IC501. The H_sync pulse is taken
from pin 1 of the FBT and fed to the micro at pin 40. These two signals are required by the micro for graphics timing and
also for text.
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9.1 B.C.L Circuit (Beam Current Limiter)
Beam current limiting is employed to protect the circuitry in the receiver, the CRT and to prevent excessive X Ray
radiation in fault conditions. The current drawn by the CRT is monitored by the current drawn through the winding of the
fly-back transformer that produces the EHT for the CRT anode. The end of the winding (Pin 10) is returned to IC403
Pins 46, the beam current drawn by the CRT passes through Q603 and develops a voltage on the collector proportional
to the current (V=IxR).
The voltage on the collector will vary depending on the beam current being drawn reducing the brightness and contrast
of the picture. If the voltage is sufficiently negative (indicating very high excess beam current) the output will be reduced, reducing the picture brightness and contrast.
10. SERIAL ACCESS CMOS 8K EEPROM 24C08
The 24C08 is a 8 Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256*08 bits.
The memory is compatible with the I²C standard, two wire serial interface which uses a bi-directional data bus and serial
clock.
EEPROM Initialisation
If the E²PROM IC500 is replaced it will come fully programmed and therefore it is not necessary to initialise the new
device. In some circumstances the E²PROM may become corrupted in use i.e. static discharge or lightning strike. If this
happens, it is advised that the E²PROM is replaced.
11. SAW FILTERS
Saw filter type: Model:
G1975M: PAL B/G MONO
K2966M: PAL SECAM B/G/D/K/I MONO
J1981 : PAL-I MONO
K2958M: PAL-SECAM B/G-D/K (38) MONO
2962M: PAL-SECAM B/G/D/K/I/L/L’ MONO
L9653M: SECAM L/L’ AM MONO (AUDIO IF)
G3967M: PAL-SECAM B/G STEREO (VIDEO IF)
G9353M: PAL-SECAM B/G STEREO (AUDIO IF)
K3958M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (VIDEO IF)
K9356M: PAL-SECAM B/G/D/K/I STEREO (AUDIO IF)
K9656M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (AUDIO IF)
K3958M: PAL I NICAM (VIDEO IF)
K9356M: PAL I NICAM (AUDIO IF)
12. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM
ST92195
STV224X
TUNER (UV1315, UV1316, UV1336)
TDA7266L / TDA7266M
TDA8174A
TDA6107
MC44608
MSP34X0G
24C08
TDA1308
SAW FILTERS
G1975M, K2966M, K2962M, L9653M, G3962M, G9353M, K3958M, K9356M, K9656M, K6263K, K9652M
13
AK - 44
CHASSIS
ST92195
The ST92195 is a member of the ST9+ family of micro-controllers, completely developed and produced by
STMicroelectronics using a proprietary n-well HCMOS process. The nucleus of the ST92195 is the advanced Core,
which includes the Central Processing Unit (CPU), the ALU, the Register File and the interrupt controller. The Core has
independent memory and register buses to add to the efficiency of the code. A set
of on-chip peripherals form a complete system for TV set and VCR applications:
– Voltage Synthesis
– VPS/WSS Slicer
– Teletext Slicer
– Teletext Display RAM
– OSD
Additional peripherals include a watchdog timer , a serial peripheral interface (SPI), a 16-bit timer and an A/D converter.
g
g
INT7/P2.0
RESET
P0.7
P0.6
P0.5
P0.4
P0.3
AIN4/P0.2
P0.1
P0.0
CSO/RESET0/P3.7
P3.6
P3.5
P3.4
B
G
R
FB
SDA1/SDI/SDO/P5.1
SCL1/SCK/INT2/P5.0
VDD
JTDO
WSCF
VPP/WSCR
AVDD3
TEST0
MCFM
JTCK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
P2.1/INT5/AIN1
P2.2/INT0/AIN2
P2.3/INT6/VS01
P2.4/NMI
P2.5/AIN3/INT4/VS02
OSCIN
OSCOUT
P4.7/PWM7/EXTRG/STOUT0
P4.6/PWM6
P4.5/PWM5/SDA2
P4.4/PWM4/SCL2
P4.3/PWM3/TSLU/HT
P4.2/PWM2
P4.1/PWM1
P4.0/PWM0
VSYNC
HSYNC/CSYNC
AVDD1
PXFM
JTRSTO
GND
AGND
CVBS1
CVBS2
JTMS
AVDD2
CVBSO
TXCF
Figure 1. Microcontroller Pin Description
14
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CHASSIS
STV224X Video processor
The STV2246/2247/2248 are fully bus controlled ICs for TV including PIF, SIF, luma, Chroma and deflection processing.
Used with a vertical frame booster (TDA1771 or TDA8174 for 90° chassis, STV9306 for 110° chassis), they allow the
design of multi-standard sets with very few external components and no manual adjustments.
SIFIN1
1
56
FMCAP
SIFIN2
2
55
AUDIOOUT
AGCSIFCAP
3
54
GNDD
V REFIF
4
53
V CCD
AGCPIFCAP
5
52
SDA
PIFIN1
6
51
SCL
PIFIN2
7
50
SLPF
TUNERAGCOUT
8
49
LFB/SSC
IFPLL
9
48
HOUT
GNDIF
10
47
VERT
AM/FMOUT/SC
11
46
BCL/SAF
V CCIF
12
45
V CC1
INTCVBSOUT
13
44
CVBSOUT2
EXTAUDIOIN
14
43
PIFLC1
15
42
PIFLC2
16
41
CLPF
VCC2
17
40
XTAL1
CVBSIN1
18
39
XTAL2
GND2
19
38
XTAL3/BTUN
CVBSIN2
20
37
FBOSD/HC
GND1
X1/VAMP/CHROUT
BS
21
36
ROSD
Y/CVBSIN3
22
35
GOSD
CHR
23
34
BOSD
APR
24
33
ICATH
BEXT/Cb
25
32
ROUT
GEXT/Y
26
31
GOUT
REXT/Cr
27
30
BOUT
FBEXT
28
29
NTBC/CVBSOUT1
Figure 2. Pin connections STV224X/8X (SDIP56)
UV1315, UV1316, UV1336
General description of UV1315
The UV1315 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications.
It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’.
Features of UV1315
Member of the UV1300 family small sized UHF/VHF tuners
Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
Voltage synthesized tuning (VST)
Off-air channels, S-cable channels and Hyper-band
Standardized mechanical dimensions and pinning
Pinning, Pin Value
1. Gain control voltage (AGC): 4.0 V, Max: 4.5 V
2. Tuning voltage
3. High band switch: 5 V, Min: 4.75 V, Max: 5.5 V
4. Mid band switch: 5 V, Min: 4.75 V, Max: 5.5 V
5. Low band switch: 5 V, Min: 4.75 V, Max: 5.5 V
6. Supply voltage: 5 V, Min: 4.75 V, Max: 5.5 V
7. Not connected
15
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CHASSIS
8. Not connected
9. Not connected
10. Symmetrical IF output 1
11. Symmetrical IF output 2
Band switching table:
Low band
Mid band
High band
Pin 3
0V
0V
+5V
Pin 4
0V
+5 V
0V
Pin 5
+5 V
0V
0V
General description of UV1316
The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications.
It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’.
Features of UV1316
Member of the UV1300 family small sized UHF/VHF tuners
Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
Digitally controlled (PLL) tuning via I²C-bus
Off-air channels, S-cable channels and Hyper-band
World standardized mechanical dimensions and world standard pinning
Complies to “CENELEC EN55020” and “EN55013”
Pinning, Pin Value
1. Gain control voltage (AGC): 4.0 V, Max: 4.5 V
2. Tuning voltage
3. I²C-bus address select: Max: 5.5 V
4. I²C-bus serial clock :Min: -0.3 V, Max: 5.5 V
5. I²C-bus serial data :Min: -0.3 V, Max: 5.5 V
6. Not connected
7. PLL supply voltage: 5.0 V, Min: 4.75 V, Max: 5.5 V
8. ADC input
9. Tuner supply voltage: 33 V, Min: 30 V, Max: 35 V
10. Symmetrical IF output 1
11. Symmetrical IF output 2
General description of UV1336
UV1336 series is developed for reception of channels broadcast in accordance with the M, N standard.
Features of UV1336
Global standard pinning
Integrated Mixer-Oscillator & PLL function
Conforms to CISPR 13, FCC and DOC (Canada) regulations
Low power consumption
Both Phono connector and ‘F’ connector are available
Pinning, Pin Value
1. Gain control voltage: 4.0 V, Max: 4.5 V
2. Tuning voltage
3. Address select Max: 5.5 V
4. Serial clock: Min: -0.3 V, Max: 5.5 V
5. Serial data :Min: -0.3 V, Max: 5.5 V
6. Not connected
7. Supply voltage: 5.0 V, Min: 4.75 V, Max: 5.5 V
8. ADC input (optional)
9. Tuning supply voltage: 33 V, Min: 30 V, Max: 35 V
10. Ground
11. IF output
16
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CHASSIS
TDA7266/TDA7266L
General Description of TDA7266L
The TDA7266L is a mono bridge amplifier specially designed for TV and Portable Radio applications. Requires very
few external components
WIDE SUPPLY VOLTAGE RANGE (3-18 V)
MINIMUM EXTERNAL COMPONENTS.
– NO SVR CAPACITOR
– NO BOOTSTRAP
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
STAND-BY & MUTE FUNCTIONS
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
Pinnig
1 N.C.
2 N.C.
3 MUTE
4 ST-BY
5 PW-GND
6 S-GND
7 IN
8 VCC
9 OUT+
10 OUT General Description of TDA7266
The TDA7266 is a 2x7 Watt dual power amplifier. It is used for sound amplification at stereo TV sets.
WIDE SUPPLY VOLTAGE RANGE (3-18 V)
MINIMUM EXTERNAL COMPONENTS
– NOSWR CAPACITOR
– NOBOOTSTRAP
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
STAND-BY & MUTE FUNCTIONS
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
Pinnig
1. OUT1 +
2. OUT1 –
3. VCC
4. IN1
5. N.C.
6. MUTE
7. ST-BY
8. PW-GND
9. S-GND
10. N.C.
11. N.C.
12. IN2
13. VCC
14. OUT2 15. OUT2 +
17
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CHASSIS
TDA8174AW
INDEPENDENT VERTICAL AMPLITUDE ADJUSTMENT. BUFFER STAGE. POWER AMPLIFIER.
FLYBACK GENERATOR. THERMAL PROTECTION. INTERNAL REFERENCE VOLTAGE DECOUPLING.
General Description
TDA8174A and TDA8174AW are a monolithic integrated circuits. It is a full performance and very efficient vertical
deflection circuit intended for direct drive of a TV picture tube in Color and B & W television as well as in Monitor and
Data displays.
Pinning
1. POWER OUTPUT
2. OUTPUT STAGE Vs
3. TRIGGER INPUT
4. HEIGHT ADJUSTMENT
5. VOLTAGE REF DECOUPLING
6. GROUND
7. RAMP GENERATOR
8. BUFFER OUTPUT
9. INVERTING INPUT
10. Vs
11. FLYBACK GENERATOR
TDA6107
Features
· Typical bandwidth of 5.5 MHz for an output signal of 60 V (p-p)
· High slew rate of 900 V/ms
· No external components required
· Very simple application
· Single supply voltage of 200 V
· Internal reference voltage of 2.5 V
· Fixed gain of 50
· Black-Current Stabilization (BCS) circuit with voltage window from 1.8 to 6 V and current window from -100
mA to 10 mA
· Thermal protection
· Internal protection against positive flashover discharges appearing on the CRT.
General Description
The TDA6107JF includes three video output amplifiers and is intended to drive the three cathodes of a colour CRT
directly. The device is contained in a plastic DIL-bent-SIL 9-pin medium power (DBS9MPF) package, and uses highvoltage DMOS technology. To obtain maximum performance, the amplifier should be used with black-current control.
Pinning, Pin Value
1. BLUE INPUT
2. VCC LOW VOLTAGE
3. GREEN INPUT
4. RED INPUT
5. VDD HIGH VOLTAGE
6. RED CATHODE CURRENT
7. RED OUTPUT
8. GROUND
9. RED FEEDBACK
10. GREEN OUTPUT
11. GREEN CATHODE CURRENT
12. GREEN FEEDBACK
13. BLUE OUTPUT
14. BLUE CATHODE
15. BLUE FEEDBACK
18
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CHASSIS
MC44608
General description
The MC44608 is a high performance voltage-mode controller designed for off–line converters. This high voltage circuit
that integrates the start–up current source and the oscillator capacitor, requires few external components while offering
a high flexibility and reliability.
The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation.
This technique enables the reduction of the stand–by power consumption to approximately 1 W while delivering 300
mW in a 150 W SMPS.
• Integrated start–up current source
• Loss less off–line start–up
• Direct off–line operation
• Fast start–up
General Features
• Flexibility
• Duty cycle control
• On chip oscillator switching frequency 40, or 75 KHz
• Secondary control with few external components
Protections
• Maximum duty cycle limitation
• Cycle by cycle current limitation
• Demagnetization (Zero current detection) protection
• “Over V CC protection” against open loop
• Programmable low inertia over voltage protection against open loop
• Internal thermal protection
GreenLine Controller
• Pulsed mode techniques for a very high efficiency low power mode
• Lossless start-up
• Low dV/dT for low EMI radiation
Pinning, Pin Value
1. Demagnetization Zero cross detection voltage: 50 mV typ.
2. I Sense Over current protection voltage 1 V typ.
3. Control Input Min: 7.5 V Max.: 18 V
4. Ground Iout 2 Ap-p during scan 1.2 Ap-p during flyback
5. Driver Output resistor 8.5 Ohm sink 15 Ohm source typ.
6. Supply voltage Max: 16 V (Operating range 6.6 V - 13 V)
7. No connection
8. Line Voltage Min: 50 V Max: 500 V
MSP34X0G
The MSP 34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analog TVStandards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analog
sound IF signal-in, down to processed analog AF-out, is performed on a single chip. Figure 3 shows a simplified
functional block diagram of the MSP 34x0G. This new generation of TV sound processing ICs now includes versions for
processing the multichannel television sound (MTS) signal conforming to the standard recommended by the Broadcast
Television Systems Committee (BTSC). The DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is
performed alignment free.
Other processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio standard.
Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BTSC and EIA-J.
The MSP 34x0G has optimum stereo performance without any adjustments. All MSP 34xxG versions are pin compatible
to the MSP 34xxD. Only minor modifications are necessary to adapt a MSP 34xxD controlling software to the MSP
34xxG. The MSP 34x0G further simplifies controlling software.
Standard selection requires a single I2C transmission only. The MSP 34x0G has built-in automatic functions: The IC is
able to detect the actual sound standard automatically (Automatic Standard Detection).
19
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CHASSIS
Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between
mono/ stereo/bilingual; no I2C interaction is necessary (Automatic Sound Selection). The MSP 34x0G can handle very
high FM deviations even in conjunction with NICAM processing. This is especially important for the introduction of
NICAM in China. The ICs are produced in submicron CMOS technology.
ADC
Sound IF2
Demodulator
I2S1
Preprocessing
Source Select
Sound IF1
Prescale
I2S2
Loudspeaker
Sound
Processing
DAC
Headphone
Sound
Processing
DAC
Loudspeaker
Subwoofer
Headphone
I2S
SCART1
DAC
SCART2
SCART3
SCART
DSP
Input
Select
SCART1
ADC
Prescale
DAC
SCART4
SCART
Output
Select
MONO
SCART2
Figure 3. Simplified functional block diagram of the MSP 34x0G.
24C08
General description
The 24C08 is a 8 Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256 * 08 bits.
The memory operates with a power supply value as low as 2.5 V.
Features
Minimum 1 million ERASE / WRITE cycles with over 10 years data retention
Single supply voltage: 4.5 to 5.5 V
Two wire serial interface, fully I²C-bus compatible
Byte and Multi-byte write (up to 8 bytes)
Page write (up to 16 bytes)
Byte, random and sequential read modes
Self timed programming cycle
Pinning, Pin Value
1. Write protect enable: 0 V
2. Not connected: 0 V
3. Chip enable input: 0 V
4. Ground: 0 V
5. Serial data address input/output: Input LOW voltage: Min: -0.3 V, Max: 0.3 * Vcc: Input HIGH voltage: Min:
0.7* Vcc, Max: Vcc+1
6. Serial clock: Input LOW voltage: Min: -0.3 V, Max: 0.3 * Vcc: Input HIGH voltage: Min: 0.7 * Vcc, Max: Vcc+1
7. Multibyte/Page write mode: Input LOW voltage: Min: -0.3 V, Max: 0.5 V: Input HIGH voltage: Min: Vcc - 0.5,
Max: Vcc + 1
8. Supply voltage: Min: 2.5 V, Max: 5.5 V
20
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CHASSIS
TDA1308
Features
Wide temperature range
Excellent power supply ripple rejection
Low power consumption
Short-circuit resistant
High performance
high signal-to-noise ratio
low distortion
Pinning, Pin Value
1. Output A (Voltage swing): Min: 0.75 V, Max: 4.25 V
2. Inverting input A: Vo (clip): Min: 1400 mVrms
3. Non-inverting input A: 2.5 V
4. Ground: 0 V
5. Non-inverting input B: 2.5 V
6. Inverting input B: Vo (clip): Min: 1400 mVrms
7. Output B (Voltage swing): Min: 0.75 V, Max: 4.25 V
8. Positive supply: 5 V, Min: 3.0 V, Max: 7.0 V
Saw filter’s list
MONO
STR
VIDEO
G1975M
K2966M
J1981
K2966M
K2962M
AUDIO
PAL BG
PSBG DK
PAL II'
PSBGDKK' II'
PSBGDKK' LL'
PAL BG
PAL II'
PSBGDKK' II'
PSBGDKK' LL'
VIDEO
G3967M
K3958M
K3958M
K3958M
AUDIO
G9353M
K9356
K9356
K9656
L9653
Pinning
1. Input
2. Input-ground
3. Chip carrier-ground
4. Output
5. Output
K9656M, L9653M
Pinnig
1. Input
2. Switching Input
3. Chip carrier-ground
4. Output
5. Output
21
2
IC
22
MC
44608
SMPS
IR SENSOR
KEYPAD
NVM
SERVICE
CONNECTOR
PLL/VST TUNER
UV1315/1316
+8V
+5V
+5V St-by
115V
+12V AUD.
IF
SCART1
FAV
MONO
R
L
STV2248C
VIDEO
PROCESSOR
VIDEO
SWITCHING CIRCUITS
ST92195
MICRO
CONTROLLER
QSS
HP. AMP.
TDA1308
MSP 34X0G
STEREO SOUND
GENERAL BLOCK DIAGRAM of 11AK44
HORIZONTAL
DRIVE
BU808DF
TDA8174AW
VER
AMP
TDA6107
RGB
AMP
TDA7266/7266L
AU.
AMP
FBT
CRT
AK - 44
CHASSIS
13. GENERAL BLOCK DIAGRAM of 11AK44
AK - 44
CHASSIS
14. SERVICE MENU
14.1 Service Menu entrance
All system, geometry and white balance alignments are performed in Service Mode. Before starting the service
mode alignments, make sure that all manual adjustments are done correctly.
To enter the service mode:
1. Press the MENU (30) button on the remote control gun. See figure 5.
2. Press digit keys 4, 7, 2 and 5 consecutively.
When the Service Mode is entered the following On Screen Display appears (figure 4):
Figure 4. Service Mode
Figure 5. Remote Control
To adjust the different registers:
1. Use the CURSOR UP (2) / DOWN (31) buttons to move between the registers. See the above right figure.
2. Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data. See figure 5.
To memorize the adjustment:
It is not required to memorize the adjustment. Data are stored automatically.
To exit the Service Mode:
Switch the TV off using the mains switch.
14.2 Service Adjustments
Register
Parameter
OSD
IF1
IF2
IF3
IF4
AGC
VLIN
RGBH
OSD Horizontal Position
IF Coarse Adjust
IF Fine Adjust
IF Coarse Adjust for L-Prime
IF Fine Adjust for L-Prime
Automatic Gain Control
Vertical Linearity
RGB Horizontal Shift Offset
VSOF
VPOF
HSOF
HPOF
HTOF
WR
WG
WB
BR
BG
Vertical Size Offset for 60 Hz
Vertical Position Offset for 60 Hz
Horizontal Size Offset for 60 Hz
Horizontal Position Offset for 60 Hz
Notes
CVBS – RGB Horizontal
position compensation
Horizontal Trap Correction Offset for 60 Hz
White Point Adjust for RED
White Point Adjust for GREEN
White Point Adjust for BLUE
Bias for RED
Bias for GREEN
23
Default Values
A51EFS13X191 A51ELD032X001
70
X
X
X
X
X
37
8
81
X
X
X
X
X
10
7
-30
2
-22
-18
-19
49
45
42
31
31
-32
1
-22
-18
-20
42
41
42
31
31
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CHASSIS
Register
APR
BRI
CON
COL
SHA
HUE
VOL
WR-R
WG-R
WB-R
FMP1
NIP1
SCP1
SEC1
FMP2
NIP2
SCP2
SEC2
F1H
F1L
F2H
F2L
BS1
BS2
BS3
CB
OP1
OP2
OP3
OP4
OP5
TX1
GEOM
OP8
Parameter
Notes
Default Values
A51EFS13X191 A51ELD032X001
APR Threshold
10
4
Factory Setting Brightness
31
31
Factory Setting Contrast
49
49
Factory Setting Colour
26
26
Factory Setting Sharpness
6
6
Factory Setting Hue
31
31
Factory Setting Volume
9
9
White Point Adjust for Red (RGB mode)
48
30
White Point Adjust for Green (RGB
53
40
mode)
White Point Adjust for Blue (RGB mode)
37
40
FM Prescaler when AVL is OFF
STEREO ONLY
11
11
NICAM Prescaler when AVL is OFF
STEREO ONLY
25
25
SCART Prescaler when AVL is OFF
11
11
SCART Prescaler when AVL is OFF for
11
11
SECAM L/L’ MONO
FM Prescaler when AVL is ON
16
16
NICAM Prescaler when AVL is ON
STEREO ONLY
37
37
SCART Prescaler when AVL is ON
STEREO ONLY
17
17
SCART Prescaler when AVL is ON for
17
17
SECAM L/L’ MONO
High Byte of crossover frequency for Meaningful for only PLL See “15.1 Service Registers
VHF1-VHF3
Tuner
Updating regarding the Tuner”
on Page 27.
Low Byte of crossover frequency for Meaningful for only PLL See “15.1 Service Registers Updating
VHF1-VHF3
Tuner
regarding the Tuner”
on Page 27.
High Byte of crossover frequency for Meaningful for only PLL See “15.1 Service Registers Updating
VHF3-UHF
Tuner
regarding the Tuner”
on Page 27.
Low Byte of crossover frequency for Meaningful for only PLL See “15.1 Service Registers Updating
VHF3-UHF
Tuner
regarding the Tuner”
on Page 27.
Band Switch Byte for VHF1
Meaningful for only PLL See “15.1 Service Registers Updating
Tuner
regarding the Tuner”
on Page 27.
Band Switch Byte for VHF3
Meaningful for only PLL See “15.1 Service Registers Updating
Tuner
regarding the Tuner”
on Page 27.
Band Switch Byte for UHF
Meaningful for only PLL See “15.1 Service Registers Updating
Tuner
regarding the Tuner”
on Page 27.
Control Byte
Meaningful for only PLL See “15.1 Service Registers Updating
Tuner
regarding the Tuner”
on Page 27.
Option 1 (see the Option List)
x
x
Option 2 (see the Option List)
x
x
Option 3 (see the Option List)
x
x
Option 4 (see the Option List)
x
x
Option 5 (see the Option List)
x
x
Teletext Option 1 (see the Option List)
x
x
Geometry Menu
See Geometry Table on Page 25.
Not used
x
x
24
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CHASSIS
14.3 Using Coloured Buttons
By using the four coloured buttons on the remote control (24, 23, 13, 14) different features or adjust may be
accessed.
Figure 6. Coloured buttons Remote Control
14.3.1 AVL
Press the RED button (23) to activate or deactivate the AVL (Automatic Volume Level, between different broadcast
channels).
14.3.2 GEOMETRY MENU
Press the GREEN button (24) in order to change from the Main Service Menu to the Geometry Menu, as shows
the figure 7. To return to the Main Service Menu it should be pressed the Menu button (30), see Figure 5.
Figure 7. Geometry Menu
Figure 8. Remote Control
In the bottom area of this Menu, it can be seen “AUTO”. By pressing the WIDE MODE button (8) it changes to 4:3
or 16:9 format. To perform the Geometry adjustments select the most suitable option:
- AUTO, entering 4:3 or 16:9 signal and proceeding with adjustments as below.
- 4:3, entering 4:3 signal and proceeding with adjustments as below.
- 16:9, entering 16:9 signal and proceeding with adjustments as below.
25
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CHASSIS
14.3.2.1 Geometry Table
Register
VSIZ
VPO S
VSCO
VCCO
HSIZ
HPO S
HPIN
HCCO
HTRP
VZSZ
Param eter
Vertical Size
Default Values
A51EFS13X191
A51ELD032X001
4:3
16:9
4:3
16:9
35
62
24
50
Vertical Position
11
16
12
16
Not used
Not used
Not used
Horizontal Position
Not used
Not used
Not used
Not used
14
7
10
33
19
0
10
3
14
7
9
33
15
0
10
2
14
7
30
40
27
0
3
7
14
7
11
39
15
0
10
2
14.3.2.2 Geometry Adjustments
VSIX (Vertical Size)
Adjust the Vertical Size so that 8% over-scan is achieved.
The effect of this adjustment is shown in figure 9.
• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.
See figure 5.
Figure 9
VPOS (Vertical Position)
Adjust the Vertical Position so that the picture is centred.
The effect of this adjustment is shown in figure 10.
• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.
See figure 5.
Figure 10
HPOS (Horizontal Position)
Adjust the Horizontal Position so that the picture is centred.
The effect of this adjustment is shown in figure 11.
• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.
See figure 5.
Figure 11
.
14.3.3 Screen Adjustment
Press the YELLOW button (13) in order to prepare the system for screen-adjustments (Vertical Scan disable).
Adjust horizontal line, via screen potentiometer, as thin as possible. To return to the Main Service Menu it should
be pressed the Menu button (30).
26
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CHASSIS
14.3.4 IF Adjustment
Select IF1, IF2, IF3 or IF4. When the blue button (14) is pressed the before selected IF register is automatically
adjusted.
14.4 Auto Programming System Set Up
1. Description
In case the TV set should be serviced, there is the possibility of returning the set with the A.P.S. (Auto Programming
System) activated in order to make easy the first start up to the customer. See the below figure.
If this Feature is activated the Picture and Sound Menus will be automatically memorized to the default values.
2. Before start
It is necessary let the TV set in the program number that will appear for the first time, because the A.P.S does not
preset this selection.
3. Procedure
3.1 Enter the Service Mode. See Page 23.
3.2 Access to TXT1 Register by CURSOR UP / DOWN.
3.3 Press 7 button on the remote control in order to activate the Auto Programming System.
3.4 Exit the Service Mode by the Menu button (30).
3.5 Switch the TV off using the mains switch.
15. OPTION LIST
15.1 Service Registers Updating regarding the Tuner
Philips UV1316S MK3
Thomson CTT5020
Samsung TECC2949PG28B
Samsung TECC2949PG35B
Alps TEDE9X226A
Alps TEDE9-004A
VHF1-VHF3
Frq. (Mhz)
156,25 MHz
114,25 MHz
170,25 MHz
170,25 MHz
142,25 MHz
149,25 MHz
VHF3-UHF
Frq. (Mhz)
441,25 MHz
401,25 MHz
465,25 MHz
449,25 MHz
425,25 MHz
424,25 MHz
AK44 SERVICE MENU ITEMS
AK30
PLL TUNER
SETTINGS
F1H
F1L
F2H
F2L
BS1
00001100
00001001
00001101
00001101
00001011
00001011
00110010
10010010
00010010
00010010
01010010
11000010
00011110
00011011
00011111
00011110
00011101
00011100
00000010
10000010
10000010
10000010
00000010
11110010
Explanations
F1H
High byte of VHF1-VHF3 cross-over frequency
F1L
Low byte of VHF1-VHF3 cross-over frequency
F2H
High byte of VHF3-UHF cross-over frequency
F2L
Low byte of VHF3-UHF cross-over frequency
BS1
Band switching byte for VHF1
BS2
Band switching byte for VHF3
BS3
Band switching byte for UHF
CB
Control byte
27
00000001
00000011
00000001
00000001
00000001
00000001
BS2
00000010
00000110
00000010
00000010
00000010
00000010
BS3
00000100
10000101
00000100
00001000
00001000
00001000
CB
10001110
10001110
10001110
10001110
10001110
10001110
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CHASSIS
15.2 Registers Details
OP1 – Peripheral Options
7
6
NOT USED
1, Display “AV-3” as “F-AV”
0, Display “AV-3” as “B-AV”
5
1, Turn back TV mode after the last AV (with AV key)
0, Turn back first AV mode after the last AV
4
1, SVHS is available in AV key stream
0, SVHS is NOT available in AV key stream
3
1, RGB is available in AV key stream
0, RGB is NOT available in AV key stream
2
1, AV-3 is available in AV key stream
0, AV-3 is NOT available in AV key stream
1 1, AV-2 is available in AV key stream
0, AV-2 is NOT available in AV key stream
0 0 1, AV-1 is available in AV key stream
0, AV-1 is NOT available in AV key stream
OP2 – Reception Standard Options
7
1, 3-button keyboard (V-, P+, V+)
0, 4/5 button keyboard (V-, V+, P-, P+, Menu)
6
1, L/L’ is available
0, L/L’ is not available
5
1, I is available
0, I is not available
4
1, DK is available
0, DK is not available
3
1, BG is available
0, BG is not available
2 1 0 RESERVED (Keep as 000)
OP3 – Video Options
7
6
Xtal Configuration
00, 1 Xtal PAL 4.43
01, 2 Xtal PAL/NTSC 4.43/3.58
10, 1 Xtal PAL/SEC/NTSC 4.43
11, 2 Xtal PAL/SEC/NTSC 4.43/3.58
5
1, Enable Blue back when no signal in AV modes
0, No blue back in AV modes
4
1, White Insertion is ON
0, White Insertion is OFF
3
1, Blue Background when no signal
0, Disable Blue Background
2
1, Semi-transparent background for menu
0, Solid Menu background for menu
1
1, Black Stretch is ON
0, Black Stretch is OFF
0 1, APR is ON
0, APR is OFF
28
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CHASSIS
OP4 – TV Features
7
1, Headphone is available (for STEREO models)
0, Headphone is not available
6
1, Arabic/Persian is Available in Menu Languages (for A, D, E, F, and later)
5
0, Arabic/Persian is NOT Available in Menu Languages
1, Hebrew is Available in Menu Languages (for A, D, E, F, and later)
0, Hebrew is NOT Available in Menu Languages
4
1, Hotel Mode can be activated
0, Hotel Mode can not be activated
3
1, No Signal Timer is enabled
0, No Signal Timer is disabled
2
For PLL Tuner
1, Frequency based search
0, Channel table based search
(No meaning for VST Tuner)
1
1, 3-band tuning (VHF1, VHF3, UHF)
0, 1-band tuning (only UHF)
0 0 1, Extra 200 msec blanking for VST
0, no-extra blanking
OP5 – Channel Tables
7
1, Extra 150 msec blanking more for VST (if OP4.b0 = 1, to SECAM color problem)
6
0, no-extra blanking
1, “Programme” item in AUTOSTORE menu is visible
0, “Programme” item in AUTOSTORE menu is invisible
5
NOT USED
4
1, French OS Channel Table is available
0, French OS Channel Table is not available
3
1, French Channel Table is available
0, French Channel Table is not available
2
1, England Channel Table is available
0, England Channel Table is not available
1
1, East Europe Channel Table is available
0, East Europe Channel Table is not available
0 1, West Europe Channel Table is available
0, West Europe Channel Table is not available
TX1 – Teletext Options
7
6
0, Auto Programming System off
1, Auto Programming System on
RESERVED (must be 0)
5 4 3
NOT USED
2 1 0 Device type selection
000, EPROM M6 A
001, ROM H5 P
010, ROMLESS H5 P
011, EPROM M6 R
100, ROM M6 R
101, OSDEPROM M6 R
110, ROM M6 P
111, Read Auto Gain Table for the device from EEPROM
29
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CHASSIS
16. LANGUAGES
GROUP 1
GROUP 2
German
Italian
Dutch
French
Spanish
Portuguese
Swedish
Norwegian
Finnish
Dannish
English
Greek
Turkish
English
Polish
Slovak
Hungarian
Russian
Bulgarian
Czech
Rumanian
Croatian
17. HOTEL MODE FUNCTIONS
The following procedure details how to set up the Hotel Mode Functions.
1. Description
The Hotel Mode deactivates Install and Program Features from the Main Features Menu. By other hand it can be
reduced the Maximum Volume Level.
2. Before Start
It is necessary to program the channel setting (tuning and sorting) because after that this features will be
deactivated.
3. Procedure
3.1 Enter the Service Mode. See Page 23.
3.2 Access to OP4 Register by CURSOR UP / DOWN.
3.3 Press 4 button on the remote control in order to activate the Hotel Mode.
3.4 Exit the Service Mode by the Menu button (30).
3.5 Enter again the Service Mode but with a new sequence of numbers: 1, 3, 2 and 5 consecutively. The following
On Screen Display appears (figure on the left):
3.6 Activate the Hotel Mode as the above righ figure.
3.7 Proceed with the required Volume Limit.
3.8 Exit the Service Mode.
30
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CHASSIS
18. CIRCUIT DIAGRAMS
18.1 Schematic Diagram of µ-Controller & IF Circuits
I
H
G
F
E
D
C
B
A
1
2
3
4
31
5
6
7
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CHASSIS
18.2 Schematic Diagram of Video Circuit
I
H
G
F
E
D
C
B
Page 33
A
1
2
3
4
32
5
6
7
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CHASSIS
18.2 Schematic Diagram of Video Circuit
I
H
G
F
E
D
C
Page 32
B
A
8
9
10
11
33
12
13
14
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CHASSIS
18.3 Schematic Diagram of SMPS Circuit
I
H
G
F
E
D
C
B
Page 35
A
1
2
3
4
34
5
6
7
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CHASSIS
18.3 Schematic Diagram of SMPS Circuit
I
H
G
F
E
D
C
Page 34
B
A
8
9
10
11
35
12
13
14
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CHASSIS
18.4 Schematic Diagram of Audio Circuit
I
H
G
F
E
D
C
B
A
1
2
3
4
36
5
6
7
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CHASSIS
18.5 Schematic Diagram of Deflection Circuit
I
H
G
F
E
D
C
B
A
8
9
10
11
37
12
13
14
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CHASSIS
18.6 Schematic Diagram of Scart & AV Front Circuits
I
H
G
F
E
D
C
B
Page 39
A
1
2
3
4
38
5
6
7
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CHASSIS
18.6 Schematic Diagram of Scart & AV Front Circuits
I
H
G
F
E
D
C
Page 38
B
A
8
9
10
11
39
12
13
14
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CHASSIS
18.7 Schematic Diagram of CRT Socket Circuit
I
H
G
F
E
D
C
B
A
1
2
3
4
40
5
6
7
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CHASSIS
19. HOW TO UPDATE THE TECHNICAL INFORMATION
19.1 How to update the Technical Information appeared on this Service Manual (and
relatives)
19.1.1. Web site: https://www.vestelservice.com
19.1.2. Select: Technical Support
19.1.3. Login: 101278
19.1.4. Password: SHPII278
By this access you can consult the latest schematic diagram or request the Parts Listing of a concrete Production Date / Serial Number.
By this way it can be also consulted the issued Technical Reports (Service Bulletins).
It can be found a Label in every chassis with additional information, i.e. the used EEPROM. See below.
On the next page are given details about the Code Bar Label.
19.2 NVM / EEPROM recorder
There is available the NVM / EEPROM recorder as spare part:
Part Reference: V20096887
Description: MD.ASY.PONYPROG
Dom. Price Code: AT
Exp. Price Code: BE
This EEPROM recorder uses the free software “Pony” available at http://www.lancos.com/ppwin95.html
Note: In case of Windows platform it is recommended the PonyProg v1.17h version.
19.3 Chassis Label Information
B+ Voltage
Batch number
Chassis code
number
25423426
- 150V
200101577
PAL /BG
Y237
- 1902 - 277
EEPROM number
Production line
number
41
Consecutive serial number
of the related batch
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CHASSIS
19.4 Code Bar Label Information
Product Code
From the beginning of September.2002,
the production month and year will be
indicated inside the box as shown.
Year
Month
Year
Consecutive number
Consecutive number
Year
Batch number
Product code:
It is the code that indicates Vestel internal identification
number of the complete TV set.
Year :
Production year in two digits, e.g.: 02 for 2002
Month :
Production month in two digits; e.g.: 04 for April.
Batch number :
It is a Vestel number that is assigned by the Planning
Dept. according to the customer orders. (For internal
use by Vestel)
Consecutive Number:
The number that indicates the sequence of the product
related to the same batch number.
42
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CHASSIS
Notes:
43
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CHASSIS
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
Technical information and Production:
Vestel Electronik AS
PRINTED BY:
ON:
Think Ecology, please use
Technical information re-issued:
SHARP ELECTRONICA ESPAÑA S.A.
Service Manual Group
Engineering Dept.
Polígono Industrial Can Sant Joan
08190 Sant Cugat del Vallès
Barcelona
Spain
RECYCLED PAPER
44