SHARP QT CD250 audio system SERVICE MANUAL

QT-CD250

SERVICE MANUAL

No. S2014QTCD250/

QT-CD250

• In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

Page

IMPORTANT SERVICE NOTEST (FOR U.S.A. ONLY) .................................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

OPERATION MANUAL ...................................................................................................................................................... 4

DISASSEMBLY .................................................................................................................................................................. 5

REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 5

ADJUSTMENT ................................................................................................................................................................... 7

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 11

TYPES OF TRANSISTOR ............................................................................................................................................... 11

SCHEMATIC DIAGRAM .................................................................................................................................................. 12

WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 14

WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 16

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 17

FUNCTION TABLE OF IC ................................................................................................................................................ 21

PARTS GUIDE/EXPLODED VIEW

PACKING OF THE SET (FOR U.S.A. ONLY)

SHARP CORPORATION

This document has been published to be used for after sales service only.

The contents are subject to change without notice.

QT-CD250

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER

TO THE OPERATION MANUAL.

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)

Before returning the audio product to the user, perform the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials, cabinet, terminal board, adjustment and compartment covers or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage current in the following manner.

* Plug the AC line cord directly into a 120 volt AC outlet.

* Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15

µ

F capacitor in series with all exposed metal cabinet parts and a known earth ground, such as conduit or electrical ground connected to earth ground.

* Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity to measure the AC voltage drop across the resistor (See diagram).

* Connect the resistor connection to all exposed metal parts having a return path to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.

VTVM

AC SCALE

1.5k ohms

10W

TO EXPOSED

METAL PARTS

0.15

µ

F

TEST PROBE CONNECT TO

KNOWN EARTH

GROUND

All check must be repeated with the AC line cord plug connection reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.

AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the audio product to the owner.

●

General

Power source: AC 120 V, 60 Hz

DC 9 V

[

"D" size (UM/SUM-1, R20 or HP-2) battery

×

6

]

DC 4.5 V

[

"AA" size (UM/SUM-3,

R6 or HP-7) battery

×

3 for backup memory

]

Power

consumption: 12 W

Output power: FTC; 2.0 W min. RMS per channel into 4 ohms from 150 Hz to 20 kHz, with no more than 10 % total harmonic distortion.

RMS; 2.3 W/CH

Speakers:

Output terminals:

(DC operation, 10 % T.H.D.)

4" (10 cm) full-range speaker x 2

Headphones; 16-50 ohms

(recommended; 32 ohms)

Dimensions: Width; 15-3/4" (400 mm)

Weight:

Height; 6-1/4" (158 mm)

Depth; 8-3/8" (212 mm)

6.0 lbs. (2.7 kg) without batteries

SPECIFICATIONS

●

Compact disc player

Type:

Signal readout:

Audio

Compact disc

Non-contact, 3-beam semi-conductor laser pickup channels: 2

Quantization: 16-bit linear quantization

Filter: 8-times oversampling digital filter

D/A converter: 1-bit D/A converter

Wow and flutter:

Unmeasurable

(less than 0.001% W. peak)

●

Radio

Frequency range:

FM; 87.5 - 108 MHz

AM; 530 - 1,720 kHz

●

Tape recorder

Frequency response:

Signal/noise ratio:

50 - 14,000 Hz (Normal tape)

50 dB

Wow and flutter:

Motor:

0.25 % (WRMS)

DC 9 V electric governor

Bias system: AC bias

Erase system: Magnet erase

Specifications for this model are subject to change without prior notice.

– 2 –

NAMES OF PARTS

1 2 3 4 5 6 7 8

9

10

11

12

13

14

15

16

25 26

29

27 28

17

18 19

1 1.

(TAPE) Record Button

1 2.

(TAPE) Play Button

1 3.

(TAPE) Rewind Button

1 4.

(TAPE) Fast Forward Button

1 5.

(TAPE) Stop/Eject Button

1 6.

(TAPE) Pause Button

1 7.

Cassette Compartment

1 8.

CD Compartment

1 9.

(CD) Stop Button

3 (TUNER) Tuning Down Button

10.

(CD) Repeat Button

3

(TUNER) Band Selector Button

11.

(TUNER) Preset Memory Button

12.

Extra Bass Button

13.

(CD) Play/Pause Button

3

(TUNER) Tuning Up Button

14.

(CD) Track Up/Cue Button

3 (TUNER) Preset Up Button

15.

(CD) Track Down/Review Button

3 (TUNER) Preset Down Button

16.

Volume Up/Down Buttons

17.

Power/Function Switch

18.

(CD) Play Indicator

19.

(CD) Repeat Indicator

REMOTE CONTROL

Remote Sensor

15

15

8" - 20'

(0.2 m - 6 m)

20 21 22 23 24

30

31

32

33

34

35

36

37

38

20.

(CD) Pause Indicator

21.

Extra Bass Indicator

22.

(TUNER) Memory Indicator

23.

(TUNER) FM Stereo Mode Indicator

24.

(TUNER) FM Stereo Indicator

25.

Battery Compartment

26.

FM Telescopic Rod Antenna

27.

Headphone Jack

28.

AC Power Input Jack

29.

Backup Memory Battery Compartment

30.

(CD) Play/Pause Button

3 (TUNER) Tuning Up Button

31.

(CD) Track Down/Review Button

3 (TUNER) Preset Down Button

32.

(CD) Stop Button

3 (TUNER) Tuning Down Button

33.

(CD) Repeat Button

3 (TUNER) Band Selector Button

34.

(TUNER) Memory Button

35.

(TUNER) Clear Button

36.

(CD) Track Up/Cue Button

3 (TUNER) Preset Up Button

37.

Extra Bass Button

38.

Volume Up/Down Buttons

Notes:

● Replace the batteries if the operating distance is reduced or if the operation becomes erratic.

● Periodically clean the transmitter LED on the remote control and the sensor on the main unit with a soft cloth.

● Exposing the sensor on the main unit to strong light may interfere with operation. Change the lighting or the direction of the unit.

● Keep the remote control away from moisture, excessive heat, shock, and vibrations.

QT-CD250

– 3 –

QT-CD250

OPERATION MANUAL

– 4 –

QT-CD250

DISASSEMBLY

Caution on Disassembly

Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they were before disassembling.

4. Take sufficient care on static electricity of integrated circuits and other circuits when servicing.

(C3)x2

Switch PWB

(D2)x7

ø3x12mm

(C2)x1

Main PWB

Terminal

PWB

(B4)x2

STEP REMOVAL PROCEDURE

1

2

Top Cabinet/

Front Cabinet

Power PWB/

Terminal PWB

1. Screw ................... (A1) x7

2. Socket .................. (A2) x1

3. Screw ................... (A3) x1

1. Screw ................... (B1) x2

2. Hook ..................... (B2) x2

3. Socket .................. (B3) x1

4. Hook ..................... (B4) x2

3 Switch PWB 1. Screw ................... (C1) x2

2. Socket .................. (C2) x1

3. Hook ..................... (C3) x2

4. Screw ................... (C4) x4

4 Main PWB/ 1. Socket .................. (D1) x1

CD Control PWB 2. Screw ................... (D2) x7

(Note) 3. Screw ................... (D3) x1

4. Solder ................... (D4) x3

5. Socket .................. (D5) x3

6. Screw ................... (D6) x6

7. Hook ..................... (D7) x2

5 CD Mechanism 1. Screw ................... (E1) x3

6 Tape Mechanism 1. Screw ................... (F1) x4

Top Cabinet

SP202

R-CH

FIGURE

5-1

5-2

5-2

5-2

5-3

5-3

5-3

(B2)x2

Power PWB

Power Transformer

(E1)x3

ø2.5x10mm

Washer

(D5)x1

(C4)x4

ø3x10mm

(C1)x2

ø3x12mm

Tape

Mechanism

(D3)x1

ø2.5x8mm

CD Lid

Switch

(B3)x1

(D1)x1

(D4)x3

(B1)x2

ø3x12mm

Figure 5-2

Top Cabinet

AC Socket

CD Mechanism

(D5)x2

(F1)x4

ø3x10mm

(D6)x6

ø3x8mm

(A3)x1

ø3x10mm

(D7)x2

Front Cabinet

(A1)x4

ø3x12mm

Main

PWB

(A2)x1

CD Control

PWB

(A1)x3

ø3x12mm

Figure 5-1 Figure 5-3

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1 to 4 of the disassembly method to remove the

CD mechanism.

How to remove the pickup (See Fig. 5-4.)

1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2) x1 pc.

2. Remove the stop washer (A3) x1 pc., to remove the gear

(A4) x 1 pc.

3. Remove the pickup.

(A1) x2

ø2.6 x6mm

Pickup

CD

Mechanism

Note : (Figure 5-3 and Figure 5-4)

After removing the connector for the optical pickup from the connector, wrap the conductive aluminium foil around the front end of connector to protect the optical pickup from electrostatic damage.

Shaft

(A2) x1

Gear

(A4) x1

Stop

Washer

(A3) x1

Figure 5-4

Top Cabinet

– 5 –

QT-CD250

TAPE MECHANISM SECTION

Perform steps 1 to 6 of the disassembly method to remove the tape mechanism. (See page 5.)

How to remove the record / playback and erase heads (See Fig. 6-1.)

1. Remove the screws (A1) x 2 pcs., to remove the record/ playback head.

2. Remove the hooks (A2) x 2 pcs., toward the center position as shown in Fig. 6-1. and then extract the erase head upward.

Note:

After replacing the heads and performing the azimuth adjustment, be sure to apply screwlock.

How to remove the pinch roller (See Fig. 6-2.)

1. Carefully bend the pinch roller pawl in the direction of the arrow

<A>

, and remove the pinch roller (B1) upwards.

Hook

(A2)x2

Erase Head

How to remove the belts (See Fig. 6-3.)

1. Remove the main belt (C1) x 1 pc., from the motor pulley.

2. Remove the FF/REW belt (C2) x 1 pc., from the REW/FF roller.

3. Put on the belts in the reverse order of removal.

Note:

When putting on the belt, ascertain that the belt is not twisted, and clean it.

(A1) x1

ø2x7mm

(A1) x1

ø2x3mm

Record/Playback

Head

Figure 6-1

Pinch Roller

(B1)x1

Figure 6-2

<A>

Pinch Roller

Pawl

Main Belt

(C1)x1

Flywheel

Motor

How to remove the motor

(See Figs. 6-4.)

1. Remove the mainbelt.

2. Remove the screw (D1) x 1 pc., to remove the motor mount.

3. Remove the screws (D2) x 2 pcs., to remove the motor.

Note:

When mounting the motor, pay attention to the motor mounting angle.

FF/REW Belt

(C2)x1

Figure 6-3

REW/FF

Clutch Ass'y

Motor

(D2)x2

Special

Screw

(D1)x1

Special

Screw

Motor

Mount

Motor

Motor Mount

(E1) x 1

Stop Washer

Figure 6-4

How to remove the flywheel (See Fig. 6-5.)

1. Remove the belt.

2. Remove the stop washer (E1) x 1 pc., with a small precision screwdriver to extract the flywheel from the capstan metal.

Note:

When the stop washer is deformed or damaged, replace it with a new one.

Washer

Flywheel

How to reinstall the parts

Install each part in the reverse order of the removal with care.

– 6 –

Figure 6-5

QT-CD250

MECHANISM SECTION

• Driving Force Check

Torque Meter

PLAY: TW-2412

Specified Value

Over 120 g

• Torque Check

Torque Meter

Play: TW-2111

Fast Forward: TW-2231

Rewind: TW-2231

• Head Azimuth

Torque Meter

MTT-114

Specified Value

25 to 65 g.cm

60 to 130 g.cm

60 to 130 g.cm

Specified Value

Output: Speaker Terminal

(CNP201 Load resistance: 4 ohms)

• Tape Speed

Test

Tape

Adjusting

Point

MTT-111 Variable resistor in motor. (M601)

Specified

Value

Instrument

Connection

3,000

±

90 Hz Output: Speaker

Teaminal

(CNP201 Load resistance: 4 ohms)

ADJUSTMENT

•

AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage Frequency Frequency

Display

AM IF 450 kHz 1,720 kHz

AM Band

Coverage

— 530 kHz

AM Tracking 600 kHz 600 kHz

1,400 kHz 1,400 kHz

Setting/

Adjusting

Parts

T3

Instrument

Connection

*1

(fL): L4

1.0

±

0.05V

(fL): L3

(fH): TC1

*3

*2

*1. Input: Antenna, Output: Pin 16 of IC1

*2. Input: Antenna, Output: Speaker Terminal

*3. Input: Input is not connected, Output: TP1

HPJ201

HEADPHONE

CNP602

3

2

1

CNP101

4 3 2 1

SW102

11

IC101

12 2

1

CNP201

3 2 1

TAPE SECTION

Position of each switch or control

Volume control

Function switch

X-BASS

Max

Tape/Power Off

On

MAIN PWB

BIAS OSC.

L301

• Bias Oscillation

Adjustment Point Specified Value

L301 82 kHz

±

6 kHz

- 6 kHz

Instrument

Connection

Pin 2 of CNP201

• Playback Amplifier Sensitivity Check

Test Tape

MTT-118

Specified Value

1.1 V

±

3 dB

Instrument Connection

Speaker Terminal

(Load resistance: 4 ohms)

TUNER SECTION fL: Low-range frequency fH: High-range frequency

•

FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

Test Stage Frequency Frequency

Display

Serring/

Adjusting

Point

FM Band

Coverage

FM RF

— 87.5 MHz (fL): L2

1.7 V

±

0.05V

98.0 MHz 98.0 MHz L1

(10-30 dB)

Instrument

Connection

*1

*2

*1. Input: Antenna, Output: TP1

*2. Input: Antenna, Output: Speaker terminal

L3

AM BAR

ANTENNA

AM

TRACKING fH

AM IF

T3

1

FM IF

L1

12

TC1

L4

R7

L2

TP1

24

AM BAND

COVERAGE fL

16

FM BAND

COVERAGE fL

13

AM

TRACKING fL

Figure 7 ADJUSTMENT POINTS

– 7 –

QT-CD250

A. CD TEST MODE

Set the function switch to "CD" when pressing the "REVIEW(PRESET DOWN )" button together with "STOP(TUNING DOWN)" button.

Step-1. CD Pickup can be move when press the "CUE" button either "REVIEW" button.

"CUE" button : CD Pickup move to out side of disc.

"REVIEW" button : CD Pickup move to in side of disc.

(CD Pickup can't move any more, if reach to most in side.)

Note: If the CD Lid open (SW810 open), the unit can be operate Step-1 only and the unit can't operate from Step-2 to Step-5.

Step-2. The LASER light up when press the "PLAY/PAUSE" button.

Step-3. CD disc can be playing mode when press the "PLAY/PAUSE" button during the LASER ON.

The LCD displays indicate the "Track Number" and the "Playing Time".

Step-4. CD disc will be stop and the LASER goes out when pressing the "STOP" button, and return back to Step-1. (CD Pickup position keeps at that point).

Step-5. It can be control to ON/OFF of the Tracking Servo when press the "MEMORY" button during the CD playing mode.

(The Servo will be ON when playing mode again, if to make stop mode during the Servo OFF condition.)

The LCD displays indicate the playing time of CD Pickup point.

(The LCD displays indicate the playing time at that point when Pickup moving, if press the "CUE" button or press the "REVIEW" button.)

– 8 –

QT-CD250

B. TUNER TEST MODE

Set the function switch to "TUNER" when pressing the "REVIEW(PRESET DOWN )" button together with "BAND(REPEAT)" button.

The LCD displays indicate the "TunEr" for several seconds. after that, the LCD displays indicate to the normal frequency.

P-10

P-11

P-12

P-13

P-14

P-15

PRESET.

NO

P-01

P-02

P-03

P-04

P-05

P-06

P-07

P-08

P-09

U.S.A.

FM 87.5 MHz

FM 108.0 MHz

FM 98.0 MHz

FM 90.0 MHz

FM 106.0 MHz

AM 530 KHz

AM 1720 KHz

AM 990 KHz

AM 600 KHz

AM 1400 KHz

FM 106.0 MHz

FM 90.0 MHz

FM 98.0 MHz

FM 108.0 MHz

FM 87.5 MHz

FM MODE

STEREO

STEREO

STEREO

STEREO

STEREO

MONO

MONO

MONO

MONO

MONO

Note:

1. The Preset Channel can be change when press the "PRESET UP (CUE) button either "PRESET DOWN (REVIEW)" button.

PRESET UP button is pressed : P-01 -> P-02 -> > > > > P-15 -> P-01

PRESET DOWN button is pressed : P-15 -> P-14 -> > > > > P-01 -> P-15

2. The Tuner Mode can be change when press the "BAND (REPEAT)" button.

BAND button is pressed : FM stereo -> FM mono -> AM -> FM stereo

C. LCD TEST MODE

Set the function switch to "TUNER (or CD)" when pressing the "REVIEW(PRESET DOWN )" button together with "MEMORY" button.

All of the segments will light up.

– 9 –

QT-CD250

D. VOLUME TEST MODE

Set the function switch to "POWER ON (TAPE PLAY, TUNER or CD)" when pressing the "REVIEW(PRESET DOWN )" button together with "PLAY/PAUSE (TUNING UP)" button.

The LCD display do not indicate the VOLUME level at this time.

But, the VOLUME level is "12" which is defaults level.

The VOLUME LEVEL can be change when press the "VOLUME UP" button either press the "VOLUME DOWN" button.

"VOLUME UP" button is pressed : (12 VoL) -> 30 VoL -> 30 VoL (30 is flashing)

"VOLUME DOWN" button is pressed : (12 VoL) -> 1 VoL-> 0 VoL -> 0 VoL (0 is flashing)

– 10 –

QT-CD250

NOTES ON SCHEMATIC DIAGRAM

• Resistor:

To differentiate the units of resistors, the symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is an ohm resistor. The resistor designated "Fusible" is a fuse type resistor

• Capacitor:

To indicate the unit of capacitor, a symbol P is used: this symbol P means micro-micro-farad and the unit of the capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used.

(CH), (TH), (RH), (UJ): Temperature compensation

(ML): Mylar type

(P.P.): Polypropylene type

• The indicated voltage in each section is the one measured by

Digital Multimeter between such a section and the chassis with no signal given.

1. Tuner

( ): AM mode

Marking except for ( ): FM mode

2. CD

( ): Play mode

Marking except for ( ): Stop state

3. Deck section

( ): Record mode

Marking except for ( ): Playback mode

Display / Control section:

( ): Active state

Marking except for ( ): CD Function mode at stop state

• Schematic diagram and Wiring Side of P.W.Board for this model are subject to change for improvement without prior notice.

• Parts marked with “ ” ( ) are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

REF. NO

SW102

SW201

SW601

SW702

SW801

SW802

SW803

SW804

SW805

SW806

SW807

SW808

SW809

SW810

DESCRIPTION POSITION

RECODE/PLAYBACK REC—P.B.

FUNCTION SELECTOR TAPE/OFF—

TUNER/ON—CD/ON

TAPE MAIN

PICKUP IN

OFF—ON

OFF—ON

OFF—ON PLAY/PAUSE/

TUNING UP

STOP/TUNING DOWN

REPEAT/BAND

TUNER/MEMORY

CUE/PRESET UP

REVIEW/

PRESET DOWN

OFF—ON

OFF—ON

OFF—ON

OFF—ON

OFF—ON

VOLUME UP

VOLUME DOWN

X-BASS

CD LID

OFF—ON

OFF—ON

OFF—ON

OFF—ON

FRONT

VIEW

E C B

(S) (G) (D)

(1) (2) (3)

KRA102 M

KRC107 M

KTA1046 Y

KTA1266 GR

KTA1273 Y

KTC3199 GR

Figure 11 TYPES OF TRANSISTOR

– 11 –

QT-CD250

A

B

C

D

E

F

G

H

SW810

CD LID

OPEN/CLOSE

PICK-UP UNIT

LD

MON

K

E

B

A

F

C

2200P

LTOH30P1

2200P

1M

1M

TR+

FO+

FO-

TR-

K

5

E

4

A

B

F

3

2

1

R-

R+

F+

F-

G

PD

VR

LD

1

2

3

4

5

6

7

8

M702

SPINDLE

MOTOR

+

M

-

M701

SLED

MOTOR

SW702

PICKUP IN

M

+

-

SP+

SP-

SL+

SL-

PU-IN

GND

6

5

4

3

2

1

CD MOTOR PWB-B

PIN

NO.

1

2

3

4

5

6

7

8

9

10

11

12

VOLTAGE

IC1

PIN

NO.

0.82V(0V)

0V(0V)

0.V

3.5V(4.1V)

13

14

15

16

17 3.7V(4.1V)

3.2V(4.1V)

3.7V(4.1V)

GND

0.4V(0.1V)

3.0V(3.6V)

1.2V

1.2V

18

19

20

21

22

23

24

VOLTAGE

2.9V(0V)

3.1V

0.7V

1.0V

0.9V

5.0V

3.6V(4.0V)

3.7V(4.1V)

3.7V(4.1V)

3.7V(4.1V)

3.7V(4.1V)

3.7V(4.1V)

( ): AM

PIN

NO.

6

7

4

5

8

9

10

1

2

3

11

12

13

14

15

16

17

18

19

20

21

22

-

3.1V

2.9V

0V

5.0V

0V

0.9V

GND

0V

1.5V

3.2V

FM ST

1.6V

GND

0.V

0V

0V

4.9V

0.9V

0.9V

1.7V

GND

1.6V

0V

1.5V

3.2V

0.9V

0.9V

1.7V

GND

1.6V

-

0V

2.9V

0V

5.0V

0V

0.9V

GND

IC51

VOLTAGE

FM MONO AM

1.6V

2V

GND

0.V

0V

0V

4.9V

GND

0.V

0V

0V

4.9V

2.0V

0V

4.2V

0.9V

0.9V

1.0V

GND

2.6V

-

0.7V

0V

0V

5.0V

0V

0.9V

GND

TAPE

RECORD/

PLAYBACK HEAD

L-CH

R-CH

ERASE HEAD

FM

ROD

ANTENNA

1

2

3

4

5

6

7

8

1

2

3

4

6

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

K

E

A

B

F

+B

LASER DRIVER

1.4V(ON:1.9V)

Q801

KTA1266 GR

4.4V(ON:2.8V)

R801

22

C802

0.022

3.7V(ON:2.1V)

R802

2.2K

C801

0.01

1.9V

1.9V

0.5V

+B

C815

47/16

IC801

C816

0.022

SERVO PRE AMP.

TA2109F

RFN

1.9V

24

4.4V

8

GND

RFO

23

GND

22

0.1V

0.5V

0V

3.8V

0V

3.7V

1.9V

0V

10

9

2VRO

10

AGCI

RFGC

RFGO

RFIS

RFRP

VRO

FEN

1.9V

21

0.5V

20

1.9V

19

1.9V

18

0.9V

17

1.9V

16

15

1.9V

11 TEN

1.9V

12 TEO

FEO 14

1.9V

0.8V

SBAD 13

C819

0.1(ML)

R803

82K

C821

100/10

R804

68K

R805

39K

R806

2.7K

C820

0.1(ML)

R807

1K

C822

0.047

C818

56P

+B

C825

47/16

C826

47P

R827

15K

C830

0.01(ML)

C827

0.015(M

1

2

3

4

5

6

7

8

TR+

TR-

FC+

FC-

GND

PD

VR

LD

3 2

+B

L803

220 µ H

C832

47/16

C828

0.0027

C829

0.0047

R828

10K

C833

0.033(ML)

+B

R812

1K

C813

47/16

C814

0.047

C863

47/16

C841

0.047

C854

0.0068

IC803

FOCUS/

TRACKING/

SPIN/

SLED DRIVER

LA6541D

R830

10K

R831

3.3K

R829

3.3K

4

3

2

1

6

5

DM+

DM-

FM+

FM-

SLT+

SLT-

FOO

TRO

C842

0.047

R834

3.3K

R832

3.3K

R833

3.3K

COR801

+B

C834

470P

NC

30 29 28 27 26 25 24 23 22 21 20

NC NC

19 18 17 16

IC803

LA6541D

1 2

NC

3 4 5 6 7 8 9 10 11 12 13 14 15

C807

0.047

SWITCHING

Q806

KTA1273 Y

5.0V

(TUN:0V)

4.3V

(TUN:5.0V)

R866

3.3K

5.0V

R845

22K

D802

1N4148

Q802

KTA1273 Y

7.5V

Q803

KRC107 M

C843

47/16

C835

470P

C836

0.047(ML)

C837

0.047(ML)

C838

0.047(ML)

C839

0.047(ML)

R854

100

C845

0.047

R

1

R851

2.2K

FMO

DMO

C806

330/10

C805

0.022

SWITCHING

R850

1.5K

2 3

0V

(TUN:7.5V)

D804

1N4148

1

SWITCHING

R861

10K

+B

GND

+7.5V(CD)

SWITCHING

+B

Q805

KRC107 M

4.4V

0V

(TUN:7.5V)

2

D806

3

1N4148 1

GND

R862

47K

Q804

KTA12

SWITC

+B

R7

10K

AM TRACKING fL

L3

AM BAR ANTENNA

VD3

KV1520NT

AM TRACKING fH

C12

1/50

C11

360P

AM BAND

COVERAGE fL

L4

AM OSC.

NC

NC

IC51

LC72121

ELECTRONIC

TUNING

Q1

KTC3199 GR

GND

TUNER

MUTE

0V

0V

R20

470

R15

39K

C19

2.2/50

C18 0.001

C57 100P

C58 100P

R14

2.2K

R17

47K

R13

10K

+B

11 10 9 8

R55

56K

NC

7 6 5 4 3 2 1

IC51 LC72121

12 13 14 15 16 17 18 19 20 21 22

C51

15P

(CH)

C52

12P

(CH)

X51

4.5MHz

+B

R458

1K

R456

15K

R455

15K

R457

1K

C8

0.001

C3

0.01

C32

0.1

C5

0.1

R6

15K

L51

100 µ H

C60

0.0022

R52

2.2K

C55

2.2/50

R76

820

5.0V

(CD: 0.4V)

2

1

3

C75

100P

Q2

KRA102 M

TUNER

SWITHCING

+B

FM BAND

PASS

FILTER

F1

1 2 3

C25

0.047

D1

1N4148

IC1

C33

220P

L2

C2

0.001

L1

FM RF

24

R4

10

23 22 21

C7

0.001

FM BAND

COVERAGE fL L2

20

TA2104BN

1 2 3 4 5

FM/AM IF MPX.,

SW102

RECORD/

PLAYBACK

R104

12K

R102

330

R

SW102-A

P

1

2

3

4

SW102

RECORD/

PLAYBACK

3 2 1

6 5 4

R P

SW102-B

9 8 7

R

SW102-C

P

SW102

RECORD/

PLAYBACK

IC1

TA2104BN

C14

0.047

AM IF

T3

R105

15K

1 3

AM IF

R103

12K

C105

0.0018

R101

330

SW102-F

R

19 20 21

P R107

1K

C107

820P C111

330P

R109

120

C108

820P

C112

330P

16 17 18

R

SW102-G

P

C106

0.0018

R108

1K

R110

120

R106

15K

6

C109

270P

C115

0.018(ML)

R113

8.2K

0.6V

3

NF1

5

0V

IN1

0V

9

IN2

NF2

0.6V 11

IC101

BA3311L

NC

4

PRE AMP 1 3.1V

VOLTAGE:

PLAY and REC.

OUT1

VCC

8

7.3V

GND

6 7

FILTER

ALC T

OUT2

10

7.3V

2

0V

12

3.2V

C110

270P

FM IF

3

C113

47/16

C114

47/16

C116

0.018

(ML)

1

R114

8.2K

C21

10/16

C23

10/16

19 18 17 16 15

7 8 9

CF4

FM DET

R115

3.9K

C118

10/16

R116

3.9K

14

10 11

R117

3.9K

R118

3.9K

13

12 C73

1/50

C74

1/50

R72

4.7K

+B

C61

100/10

R51

150 R245

5.6K

R18

100

R71

4.7K

R73

3.3K

R74

3.3K

R121

2.7K

COR1

Speaker Case

R

22

SW102-E

P

23 24 SW102

RECORD/

PLAYBACK

R126

100

CD

L-CH

7

TU

TA

8

9

10

SW201-B

SW201

FUNCTION

SELECTOR

R233

2.2K

R239

2.2K

R243

560K

R237

2.7K

C241

1/50

Q209

KTC3199 GR

0V(OFF:0.6V)

R241

10K

Q209,Q210

X-BASS ON/OFF

CD

R-CH

14

SW201-C

TU

TA

13

12

11

R242

10K

R238

2.7K

0V(OFF:0.6V)

Q210

KTC3199 GR

R240

2.2K

R234

2.2K

IC101

REC./P.B.EQUALIZER AMP.

BA3311L

C242

1/50

R244

560K

Q211,Q212

LINE AMP

2.0V

R246

5.6K

R249

220

+B

+B

C123

220/10

R125

680K

13

NC

14 15

SW102

RECORD/

PLAYBACK

R

SW102-H

P

R122

2.7K

R54

10K

SW102-D

R

12 11 10

P

NC

SW102

RECORD/

PLAYBACK

BIAS OSC.

L301

C352

100/10

R351

100

C354

0.022(ML)

BIAS OSC.

R353

33K

Q351

KTC3199 GR

0V

(REC: 0.4V)

R352

150

C353

0.0056

(ML)

R354

4.7

M601

TAPE

MOTOR

M

SW601

TAPE

MAIN

-

+

• The numbers 1 to 17 are waveform numbers shown in page 16.

1 2 3

– 12 –

4

Figure 12 SCHEMATIC DIAGRAM (1/2)

5 6

QT-CD250

C825

47/16

C826

47P

ML)

ML)

ML)

R854

100

+B

OSC.

199 GR

0.4V)

R827

15K

C830

0.01(ML)

C828

0.0027

C829

0.0047

R828

10K

C833

0.033(ML)

+B

C854

0.0068

R812

1K

R830

10K

R831

3.3K

R834

3.3K

C845

0.047

C827

0.015(ML)

R829

3.3K

R832

3.3K

R833

3.3K

R821

1K

R840

10

+B

C840

0.1

SWITCHING

+B

Q805

KRC107 M

0V

(TUN:7.5V)

4.4V

2

D806

3

1N4148 1

GND

R862

47K

5.0V

Q804

KTA1266 GR

SWITCHING

+B

51

5MHz

0.4V)

2

1

3

Q2

A102 M

UNER

THCING

+B

R458

1K

R456

15K

R455

15K

R457

1K

R239

2.2K

R243

560K

R237

2.7K

C241

1/50

Q209

KTC3199 GR

0V(OFF:0.6V)

R241

10K

R245

5.6K

R242

10K

R238

2.7K

0V(OFF:0.6V)

Q210

KTC3199 GR

R240

2.2K

C242

1/50

R244

560K

Q211,Q212

LINE AMP

2.0V

R246

5.6K

R AMP.

+B

R249

220

+B

R824

10K

12

LPFN

50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31

51

52

53

54

55

LPFO 3.7V

(TUN:0V)

PVREF 1.9V

(TUN:0V)

VCOF 1.7V

(TUN:0V)

AVSS GND

56 SLCO 1.9V(TUN:0V)

57 RFI 1.9V(TUN:0V)

13

R872

4.7K

5.0V

(TUN:0V)

0V(TUN: 4.9V)

DI

NC

30

29

5.0V

0.6V(TUN: 5.0V)

4.9V(TUN: 0V)

5.0V

ADIN3 28

27 KEY2

KEY1

CD

POWER

PU IN

26

25

24

58 AVDD 4.4V(TUN:0V)

59 RFCT 1.9V(TUN:0V)

60 RFZI 1.9V(TUN:0V)

61 RFRP 0.9V(TUN:0V)

62 FEI 1.9V(TUN:0V)

63 SBAD 0.7V(TUN:0V)

64 TEI 1.9V(TUN:0V)

65 TEZI 1.9V(TUN:0V)

66 FOO 1.9V(TUN:0V)

67 TRO 1.9V(TUN:0V)

68 VREF 1.9V(TUN:0V)

69 RFGC 0.5V(TUN:0V)

70 TEBC

71

72

0V

FMO 1.9V(TUN:0V)

DMO 1.9V(TUN:0V)

73 2VREF 3.7V(TUN:0V)

74 SEL 0V

75 VDD2 4.4V(TUN:0V)

76 VSS2 GND

77 XVSS GND

78 XI 2.0V(TUN:0V)

79 XO (TUN:0V)

5

14

6

11

4

7

15

16

1

IC802

SERVO/

SIGNAL

CONTROL

TC9457F2

0V

5.0V(TUN:0V)

0V(TUN: 5.0V)

GND

DOOR IN

TUNER-

FUNC

CD-FUNC

23

22

21

MVSS1 20

5.0V

MVDD1 19

NC 18

SEG17 17 NC

2.5V

SEG16

16

2.5V

SEG15

15

2.5V

SEG14

14

2.5V

SEG13 13

2.5V

SEG12 12

2.5V

SEG11

11

2.5V

SEG10

10

2.5V

SEG9

9

2.5V

2.5V

SEG8

SEG7

8

7

2.5V

SEG6

2.5V

2.5V

SEG5

SEG4

6

5

4

2.5V

SEG3

2.5V

2.5V

SEG2

SEG1

3

2

1 80 XVDD

DVSR

17

GND 81 82 83 84 85 86 87 88 89 90

NC

R825

10K

91 92 93 94 95 96 97 98 99 100

R898

47K

R900

47K

L801

220 µ H

C862

0.1

R901

47K

GND

R876

10K

R899

47K

R873

4.7K

+B

R878

10K

R877

R875

10K

10K

R843

4.7K

R846

4.7K

R882

47K

R883

47K

R884

47K

R885

R890

47K

R891

47K

R892

47K

R893

47K

R894

47K

R895

47K

R896

47K

R897

47K

47K

R886

47K

R887

47K

R888

47K

R889

47K

+B

+B

R836

270

C852

3.3/50

C850

0.0022

C849

0.0022

R835

270

C851

3.3/50

C870

100P

X802

4.19MHz

R871

4.7K

7.5V

+B

Q206

KTA1046 Y

7.5V

9V

7.5V REGULATOR

+B

8.4V

R205

4.7K

C212

0.047

8.4V

R204

2.2K

C232

1/50

SW201

FUNCTION

SELECTOR

CD

SW201-A

4

TUN 3 1

TAPE

2

NC

+B

100P C204

5V

Q204

KTA1273Y

5.0V

7.5V

C211

0.047

7.0V

7.0V

+B

7.0V

0V

R206

560

SW201

FUNCTION

SELECTOR

Q204,Q205:5V

REGULATOR

R201

1.2K

SW201-D

19

16

CD

18

17

TUN

TAPE

C302

0.022

C202

47/16

R203

270

+B

+B

3

2

1

3

2

1

+B

R209

1K

C229

1/50

C231

1/50

R251

22K

R252

22K

R838

10K

R213

100

R837

10K

+B

IC202

ELECTRONIC

VOLUME

TC9260P

0V

(ON:4.4V)

R221

4.7K

Q203 SWITCHING MUTE

KTA1266 GR

4.8V(ON:4.4V)

4.4V(ON:3.8V)

R250

470K

C219

1/50

C213

1/50

MUTE

0V

7

0.6V

8

R231

120

9 10 11 12

R219

220K

13 14 15 16

R223

4.7K

9

5.0V-

4.6V

IC202

0V(ON:0.6V)

C246

10/16

+

-

8 7 6 5 4 3 2 1

4

GND

R220

220K

R225

100K

R224

4.7K

0V(ON:0.6V)

MUTE

C230

1/50

R210

1K

C207

470/10

R207

560

R222

4.7K

C214

1/50

C220

1/50

0V

5

0.6V

-

6

8.2V-

8.4V

+

1

+B

ZD203

ZD2.4BSB

C208

0.022

C205

47/16

4.5V-

4.2V

11

8.6V-

8.0V

C237

100/10

10

GND

13

14

GND

8.6V-

8.0V

3

4.5V-

4.2V

2

12 9.0V

C201

100/16

C226

0.022

+B

+B

2

3

8

1

4

5

1

2

5

4

3

+B

10

11

8

9

6

7

12

9

7

11

10

6

1

2

3

4

2

3

8

1

4

5

1

2

5

4

3

12

11

10

9

7

6

8

9

6

7

10

11

R847

5.6K

R848

10K

+B

R849

18K

R841

5.6K

3

4

1

2

SW801

PLAY/PAUSE/

TUNING UP

SW802

STOP/

TUNING

DOWN

SW803

REPEAT/

BAND

UN801

REMOTO SENSOR

N64H380A

SW804

TUNER/

MEMORY

SW809

X-BASS

R808

100

1

SW805

CUE/

PRESET

UP

C810

10/16

3

2

SW808

VOLUME DOWN

+B

SW807

VOLUME UP

SW806

REVIEW/

PRESET

DOWN

R857

47K

R855

18K

SWITCH PWB-A4

C233

470/10

C239

0.1(ML)

C240

0.1(ML)

C234

470/10

POWER PWB-A3

FM SIGNAL

AM SIGNAL

CD SIGNAL

PLAYBACK SIGNAL

RECORD SIGNAL

CD CONTROL PWB-A2

LCD801 LCD DISPLAY

X-BASS

MEMORY

1 2 3 4 5 6

ST

KHz

7 8

MHz

9 10 11 12 13 14 15 16 17 18 19 20

1

2

3

BATTERY

DC 9V ["D" size (UM/SUM-1,R20 or

HP-2) battery x 6]

1

2

3

R227

120

R228

120

T651

POWER TRANSFORMER

6

7

4

5

2

3

1

MAIN PWB-A1

-

-

+

+

HPJ201

HEADPHONES

SP201

L-CH

4 OHM

SPEAKERS

SP202

R-CH

4 OHM

AC INPUT

SO651

AC INLET

SOCKET

AC 120V,60Hz

AC/DC

SELECTOR

R354

4.7

M601

TAPE

MOTOR

M

-

+

SW601

TAPE

MAIN

R230

2.7

+B

BATTERY

DC 4.5V ["AA" size (UM/SUM-3,R6 or

HP-7) battery x 3 for backup memory]

TERMINAL A PWB-A5/

TERMINAL B PWB-A6

• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.

7 8 9 10

Figure 13 SCHEMATIC DIAGRAM (2/2)

– 13 –

11 12

QT-CD250

SP201 L-CH

SPEAKERS

SP202 R-CH

1 2 3 4 CNP101

G H

C351

L301

A

BK

PLAY

SW102

RECORD/

PLAYBACK

R103

R104

R121

REC A

E

B

F

C D

C354

R352

E

C

B

R353

C353

SW808

VOLUME

DOWN

UN801

1

2

3

C810

R809

SW809

X-BASS

SWITCH

PWB-A4

SW803

REPEAT/

BAND

SW802

STOP/TUNING

R849

R848

SW807

VOLUME

UP

R808

CNS801

3

4

1

2

SW804

TUNER/

MEMORY

1 2 3

CNS201

R124

1 3 5 7 9 11

2

D102

4 6 8 10 12

IC101

C123

R126

C249

R227

B

C

D

E

F

R857

R855

LCD801

1

CNP201

1 2 3

R249

3

2

1

C230

C226

C232 R252

C240

R230

SW201

B C

A

BK

BK

CNP801

2

1

4

3

D

14

15

17

4

16

OPEN/CLOSE

R246

R248

C229

Q212 E C B

R244

C244

R240

C242

R236

R234

R238

C224

R233

E C B

C231

R247

R243

C243

R239

C241

R209

16

R217

C217

R219

C215

R207

15

14

12

13

11

10

9

R235

R237

C223

Q210

R241

B C E

B C E

Q209

C245

R74

R73

R856

SW810

CD LID

12

1

C205

C208

R221

R210

5

6

7

8

1

2

3

4

C216

R223

C246

R224

R222

R218

C218

R220

R225

C214

E

C

B

Q203

B

C

E

R253

R250

B C E

R212

C220

R254

13

9

8

7

12

11

10

4

5

6

1

2

3

14

C201

C238

D201

C227

C302

D801

Q206

B

C

E

11

C852

C851

R838

11

1

3

2

1

R892

R891

R890

R889

R888

Q804

B

C

E

R901

R900

R899

R898

C862

R895

R894

R897

R896

R893

R887

R886

R885

R884

R883

R882

R846

R843

R837

C849

R825

C846

R839

X802

100

1

C853

R864

R863

5

95

90

85

C864

C850

75

70

65

10

15

IC802

60

55

20

25 35

40

45

C837

C844

81 80

C872

C845

X801

3031

C825

R840

C832

C840

51

50

C823

R826

C854

C821 C822

C813

R834

R803

R833

R831

R830

R829

C836 C818

R807

C819

C829

13

15

20

C863

C814

24

12

1

10

5

C841

C828

C830

R804

C816

C801

C802

C815

Q801

R801

B C E

C817

R824

C824

C843 C842

C865

R876

C870

R861

R854

1

2

3

E C B

L803

Q806

R845

D802

15

10

5

16

20

25

C807

5

1

8

1

1

Q207

E

C

B

BI803

R851

1 30

6

B

C

E

Q204

5

Q205

E

C

B

10

Q802

E

C

B

8

BK

WH

WH

WH

WH

CNS802

1

2

3

4

5

WH

WH

WH

WH

WH

WH

WH

BK

4

3

2

1

6

5

8

7

CNS801

1 6

5

BK

C75

10

G

H

BK

R841

R847

SW801

PLAY/PAUSE/

TUNIG UP

11

SW805

CUE/

PRESET UP

15

20

12

SW806

DOWN/

REVIEW/

PRESE

1

1

FW801

FW802

CD CONTROL

PWB-A2

L3

AM BAR ANTENNA

TO

SP202

(R-CH)

(245)

BK

R59

R60

R61

R62

R13

R55

R58

X51

3

2

1

Q2

R54

C61

R76

C68

11 12

10

15

C54

C18

5

1

20

22

C10

L4

R14

C58

R53

C60

R52

C55

R8

C11

C57

R20

R6

C6

C7

R5

C51

R18

Q1

B

C

E

C19

L2

R4

R12

C5

24

R16

R71 C73

L1

C32

IC1

20 5

C34

15

13 12

VD1

1

T3

10

C74

C13

3 2 1

1 2 3

CF1

C71

CF4

C16

C72

R72

1

2

3

F1

D1

C33

C15

C25

• The numbers 1 to 17 are waveform numbers shown in page 16.

1 2 3 4

Figure 14 WIRING OF P.W.BOARD (1/2)

– 14 –

5

MAIN PWB-A1

6

HPJ201

HEADPHONES

7

13

9

2

3

12

QT-CD250

ERASE HEAD

(240-5)

TAPE

RECORD/PLAYBACK

HEAD(240-4)

(241)

(241)

SW601

TAPE MAIN

(240-7)

M601

TAPE MOTOR

(240-6)

CNS101

WH

1

BK

2

3

RD

4

BK

BK

BK

TERMINAL B PWB-A6

BATTERYS

DC4.5V ["AA" SIZE(UM/SUM-3,

R6 or HP7)battery x 3]

(241)

BK

BR

YL

RD

TERMINAL A PWB-A5

(230)

7

WH

GY

GY

GY

GY

GY

CNS803

1

2

3

4

5

6

(229)

BATTERYS

DC9 V [ "D" size(UM/SUM-1,

R20 or HP2) battery x 6 ]

C652 C653

D653

D652

D654

D651

C654

YL

YL

RD

BK

OR

OR

OR

POWER PWB-A3

PICK UP UNIT

OR

1

2

3

CNS602

T651

POWER

TRANSFORMER

OR

OR

RD

RD

SO651

AC INLET

SOCKET

AC 120V,

60Hz

5 4 3 2 1

8 7 6 5 4 3 2 1

CD MOTOR PWB-B

CNP803

1

2

3

4

5

6

+

-

F 3 8 9 5 A F

M701

SLED MOTOR

M702

SPENDLE MOTOR

SW702

PICKUP IN

+

-

8

(233)

FM ROD ANTENNA(237)

9 10

Figure 15 WIRING OF P.W.BOARD (2/2)

– 15 –

COLOR TABLE

B R

R D ( R )

O R

Y L

G R

B L

V L

G Y

W H ( W )

B K

P K

BROWN

RED

ORANGE

YELLOW

GREEN

BLUE

VIOLET

GRAY

WHITE

BLACK

PINK

11 12

QT-CD250

NO DISC FOCUS SEARCH

1

IC802 66pin

FOO

2

IC803 20pin

FO+

3

IC803 21pin

FO-

FOCUS SEARCH TOC IL

4

IC802 74pin

SEL

5

IC802 62pin

FEI

6

IC802 64pin

TEI

STOP PLAY

5

IC802 62pin

FEI

7

IC802 63pin

SBAD

8

IC801 22pin

RFO

STOP PLAY

5

IC802 62pin

FEI

9

IC801 19pin

RFGO

10

IC801 17pin

RFRP

STOP PLAY

6

IC802 64pin

TEI

11

IC802 67pin

TRO

7

IC802 63pin

SBAD

WAVEFORMS OF CD CIRCUIT

1

2

3

1

2

3

1

2

3

1

2

3

1

STOP PLAY

12

IC802 50pin

TMAX

13

IC802 45pin

SBOK

14

IC802 72pin

DMO

STOP PLAY

6

IC802 64pin

TEI

11

IC802 67pin

TRO

15

IC802 71pin

FMO

CUE

6

IC802 64pin

TEI

11

IC802 67pin

TRO

15

IC802 71pin

FMO

REVIEW

6

IC802 64pin

TEI

11

IC802 67pin

TRO

15

IC802 71pin

FMO

TCD-782 TNO-02 PLAYBACK

16

IC802 86pin

LO

2

3

17

IC802 82pin

RO

1

2

3

1

2

3

1

2

1

2

3

1

2

3

– 16 –

QT-CD250

TROUBLESHOOTING (CD SECTION)

When the CD does not function

When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. Clean the objective lens, and check the playback operation. When this section does not operate even after the above step is taken,check the following items.

Remove the cabinet and follow the troubleshooting instructions.

"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."

Turn the power off.

Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.

Do not touch the lens with the bare hand.

Dust gradually accumulates on the objective lens during use, and it may degrade performance.

To avoid this problem, use a cleaning disc designed for CD optical pickup lenses.

HOW TO USE

1. Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the brush on the CD cleaner disc which has the mark next to it.

2. Place the CD cleaner disc onto the CD disc tray with the brush side down, then press the play button.

3. You will hear music for about 20 seconds and the CD player will automatically stop. If it continues to turn, press the stop button.

CAUTION

The CD lens cleaner should be effective for 30 - 50 operations, however if the brushes become worn out earlier then please replace the cleaner disc.

If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft cloth.

Do not drink the cleaner fluid or allow it to come in contact with the eyes. In the event of this happening then drink and / or rinse with clean water and seek medical advice.

The CD cleaner disc must not be used on car CD player or on computer CD ROM drives.

All rights reserved. Unauthorized duplicating, broadcasting and renting product is prohibited by law.

Cleaner Liquid Cleaning Disc

PARTS CODE:

UDSKA0004AFZZ

• The CD function will not work.

The CD operating keys don't work.

Yes

Check the power supply, 16.93 MHz clock, and reset terminal.

Yes

Check the pickup-in switch (SW702) position.

Yes

Check the Focus system.

Figure 17

– 17 –

QT-CD250

• Laser failure.

Is +7.5V applied to the Collector of Q206 ?

Yes

Is +5V applied to the collector of Q204 and Q806 ?

Yes

Is +5V applied to the pin 75 (VDD) and pin 96 (MVDD) of

IC802 ?

Yes

Is +5V applied to the pin 1 (VCC) of IC801 ?

Yes

Is +0V applied to the pin 74 (SEL) of IC802 ?

Yes

Is approx. 1.8V applied to the collector of Q801.

Yes

Check BI801/CNS801. If it is normal, the optical pickup is faulty.

No

Check the PWB pattern of Q206.

No

Check the PWB Patten of IC204 and Q806.

No

Check the PWB pattern between collector of Q806 and pin 75 of

IC802, and emiter of Q806 and Q804 and pin 96 of IC802.

No

Check the PWB pattern between collector of Q204 and pin 1 of

IC801.

No

Check the laser come on when pattern cut between pin 8 (SEL) of

IC801 and pin 74 (SEL) of IC802.

No

Check the peripheral parts of IC801 and Q801. If it is normal, the optical pickup is faulty.

• Focus failure.

Does the optical pickup move up and down when the disc is removed?

Yes

Is the following waveform ouput at the pin 62 (FEI) of IC802 when the disc is set?

Yes pin 62

(FEI) pin 86

(FOO) pin 63

(SBAD)

Is the waveform shown above input at the pin 63 (SBAD) of

IC802?

Yes

IC801 is faulty.

No

Check as stated in item "FOCUS SERVO SAWTOOTH WAVE

FAILURE".

No

Check the periphery of IC801 and BI801/CNS801. Is it normal?

Yes

The optical pickup is faulty.

No

Check the pattern between pin 13 of IC801 and pin 63 of IC802.

Check the periphery of IC801 and BI801/CNS801.

– 18 –

QT-CD250

• Focus servo sawtooth wave failure.

Is sawtooh wave output to the pin 66 (FOO) of IC802 ?

Yes

1.5~2.5sec

No

IC802 is faulty.

Is +7.5V applied to the pins 1 and 30 (VCC) of IC803 ?

Yes

No

Is sawtooth wave obtained between pins 20 and 21 of IC803 ?

Yes

1.5~2.5sec

No

Check the PWB pattern of IC803.

Check the PWB pattern of IC803.

Is sawtooth wave obtained between pins 3 and 4 of BI801/

CNS801 ? (as shown above)

Yes

BI801/CNS801 connection failure or optical pickup failure.

No

Check the PWB pattern between BI801/CNS801 and IC803.

• Spindle motor clv servo failure.

Is following wave output to the pin 72 (DMO) of IC802 when the Function is changed to "PLAY" from "STOP" ?

Yes

DMO

No

Check the procedure in "HF ERROR".

If OK. IC802 is faulty.

Is above wave obtained between pins 5 and 6 of IC803 ?

Yes

Is above wave obtained between pins 5 and 6 of BI803/

CNS803 ?

Yes

BI803/CNS803 connection failure or optical pickup failure.

No

Check the PWB pattern between pin 72 (DMO) of IC802 and pins

5 and 6 of IC803. If OK. IC803 is faulty.

No

Check the PWB pattern between BI803/CNS803 and IC803.

– 19 –

QT-CD250

• Track search failure

Does the sled motor run in FF/REW state when the CD

TEST MODE is set?

Yes

Is the following wave output to the pin 67 (TRO) of IC802 during track search in normal playback?

Yes

TRO

Is the following wave output to the pins 12 (TEO) of IC801 during track search in normal playback?

Yes

TEO

TEI

TEZI

Is the above wave output to the pins 64 (TEI) and 65 (TEZI) of IC802 during track serch in normal playback?

Yes

Is the following wave output to the pin 60 (RFZI) and 61

(RFRP) of IC802 during track search in normal playback?

Yes

RFRP

No

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

IC802 failure.

No

No

Check the PWB pattern between pin 67 (TRO) of IC802 and pin

28 of IC803.

Check the PWB pattern between pins 25 and 26 of IC803 and

Optical pickup.

If OK. Optical pickup failure.

Check the PWB pattern between pin 12 (TEO) of IC801 and pins 64

(TEI) and 65 (TEZI) of IC802. If OK. IC801 failure.

No

Check the PWB pattern between pin 22 (RFO) and 18 (RFIS), 17

(RFRP) of IC801 and pins 60 and 61 of IC802. If OK. IC801 failure.

RFZI

Normal.

• Sled motor operation failure.

Is following sled feed signal output the pin 71 (FMO) of IC802 when FF/REW key is pressed after the CD TEST MODE is seted?

Yes

FF REW

FMO

No

Is following sled feed signal input the pins 12 and 13 of IC803 when FF/REW key is pressed after the CD TEST MODE is seted?

Yes FF REW

SL

±

IC802 is faulty.

No

Check the PWB pattern between pin 71 of IC802 and pins 12 and

13 of IC803.

Is sled feed signal output the pins 10 and 11 of IC803?

Yes

Is sled feed voltage applied between both terminals of sled motor?

Yes

Check the CD mechanism (periphery of sled motor).

If the sled motor does not run when DC2.0V is applied to both terminals of sled motor, the sled motor is faulty.

• Sled servo failure.

Is following sled signal output the pin 71 (FMO) of IC802 during playback?

Yes

FMO

No

Check the peripheral parts of IC803. If OK, IC803 is faulty.

Check the BI803/CNS803.

No

No

IC802 is faulty.

Normal.

– 20 –

QT-CD250

FUNCTION TABLE OF IC

IC51 VHiLC72121/-1: Electronic Tuning (LC72121) (1/2)

Pin No.

Port Name Terminal

Name

Input/Output Function

1

2

3

4

5

6

7*

8-10

11

12

13

14

Xtal

Ground

Chip enable

Input data

Clock

Output data

Output port

Output port

Input/output port

IF counter

Input/output port

Ground

XIN

VSSX

CE

DI

CL

DO

BO1

BO2-BO4

IO1

IF IN

IO2

VSSD

Output

Output

Output

Input

Crystal oscillator connection.(4.5 MHz/7.2 MHz)

Ground terminal for the crystal oscillation circuit system of LC72121.

High level when inputting serial data (DI) to LC72121 or sending serial data (DO).

Input terminal for serial data that is transferred from the controller to

LC72121.

Output

Output

Clock that synchronizes data when inputting serial data (DI) to

LC72121 or sending serial data (DO).

Output terminal that sends data from LC72121 to the controller. The output data is defined by serial data DOC0-DOC2.

Output Output dedicated terminal.

Output state is defined by the serial data BO1-BO4.

Data 0: Open

Data 1: L

Time base signal (8 Hz) output is possible from BO1 terminal.

(When setting serial data TBC = 1.)

Output Output dedicated terminal.

Output state is defined by the serial data BO1-BO4.

Data 0: Open

Data 1: L

Time base signal (8 Hz) output is possible from BO1 terminal.

(When setting serial data TBC = 1.)

Input/Output Terminal for both input and output.

Input and output are defined by serial data IDC1 and IOC2.

Data 0: Input port

Data 1: Output port

When specified as the input port.

The input terminal state is transferred from the DO terminal to the controller.

Input state "L": Data -> 0

Input state "H": Data -> 1

When specified as the output port.

Output state is defined by the serial data IO1 and IO2.

Data 0: Open

Data 1: L

When turning on the power or resetting, the terminal becomes the input port.

Input Input frequency is 0.4-12 MHz.

Signal is transferred to the IF counter directly.

The result is sent from M5B of the IF counter through DO.

4 measuring times: 4, 8, 32, and 64 ms

Input/Output Terminal for both input and output.

Input and output are defined by serial data IDC1 and IOC2.

Data 0: Input port

Data 1: Output port

When specified as the input port.

The input terminal state is transferred from the DO terminal to the controller.

Input state "L": Data -> 0

Input state "H": Data -> 1

When specified as the output port.

Output state is defined by the serial data IO1 and IO2.

Data 0: Open

Data 1: L

When turning on the power or resetting, the terminal becomes the input port.

— Ground terminal for the digital system other than VSSA and VSSX of

LC72121.

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

– 21 –

19

20

21

22

QT-CD250

IC51 VHiLC72121/-1: Electronic Tuning (LC72121) (2/2)

Pin No.

Port Name Terminal

Name

Input/Output

15

16

17

18

Local oscillation, Signal input AMIN

Local oscillation, Signal input FMIN

Power supply

Charge pump output

L.P.F. Amplifier transistor


Ground

Xtal

VDD

PD

AIN

AOUT

VSSA

XOUT

Input

Input

—

Output

Input

Output

—

Output

Function

Serial data input: AMIN is selected when DVS = 0 is set.

When serial data input SNS = 1 is set:

Input frequency is 2-40 MHz.

Signal is sent to the swallow counter directly.

Dividing number to be set is 272- 65535. The actual dividing number is the same as the setting value.

When serial data input SNS = 0 is set.

Input frequency is 0.5-10 MHz.

Signal is transferred to the 12-bit programmable divider directly.

Dividing number to be set is 4-4095. The actual dividing number is the same as the setting value.

Serial data input: FMIN is selected when DVS = 1 is set.

Input frequency is 10-160 MHz.

Signal is transferred to the swallow counter through the built-in prescaler (1/2).

Dividing number to be set is 272-65535. The actual dividing number is twice as the setting value because there is a built-in prescaler(1/2).

Power supply terminal for LC72121 (VDD = 2.7-3.5 V).

Power on reset circuit works when POWER ON.

Charge pump output terminal for PLL.

When the local oscillation signal frequency divided by N is higher then the refernce frequency, "H" level is sent from the PD terminal.

When it is lower, "L" level is sent. When the frequencies are the same, they become high impedance.



Ground terminal for the low-pass filter MOS transistor of LC72121.

Crystal oscillator connection.(4.5 MHz/7.2 MHz)

VSSx 2

XIN 1

XOUT

22

FMIN 16 1/2

REFERENCE

DIVIDER

SWALLOW COUNTER

1/16, 1/17 4bits

PHASE DETECTOR

CHARCE PUMP

UNLOCK

DETECTOR

18 PD

19

AIN

20 AOUT

21

VSSa

12bits PROGRAMMABLE

DIVIDER

AMIN

15

CE 3

DI

4

CL 5

DO 6

V

DD

17

VSSd 14

CCB

I/F

POWER

ON

RESET

DATA SHIFT REGISTER

LATCH

UNIVERSAL

COUNTER

12 IFIN

7 8 9 10

BO1 BO2 BO3 BO4

11 13

IO1 IO2

Figure 22 BLOCK DIAGRAM OF IC

– 22 –

QT-CD250

IC1 VHiTA2104BN-1: FM /AM IF MPX. (TA2104BN)

FM RF OUT

24

FM RF

23

AM RF IN

22

FM OSC

21

AM OSC

20

OSC OUT

19

ST IND

18

IFREQ

17

DET OUT

16

MPX IN

15

LPF1

14

LPF2

13

FM

OSC

AM

OSC

BUFF

BUFF

ST

LEVEL

DET 1/8

IF

BUFF

FW

IF

REQ

AF

BUFF

AN

DET

FM

DET

AF

VCC

DIYIDE

DECODE

ST/MO

FM/AM

AM

MIX

AGC

FMRE

FM

MIX

AMIF FMIF MUTE

1

RF GND

2 3

FM RF ON AM

LOW OUT

4

MIX OUT

5 6 7 8

Vcc AM IF IN FM IF IN GND

9

AGC

10 11

QUAD R-OUT

12

L-OUT

IC202 VHiTC9260P/-1: Electronic Volume (TC9260P)

Vss

1

V

DD

16

L-ch

VOLUME

OUT 2

IN 3

LD1

4

LD2 5

A-GND

6

CS 7

CK 8

L-ch

LATCH

R-ch

LATCH

DATA DECODER, STB GENERATOR

SHIFT REGRATER (13bit)

Figure 23 BLOCK DIAGRAM OF IC

15 OUT

14 IN

13 LD1

R-ch

VOLUME

12 LD2

11 A-GND

10 STB

9 DATA

– 23 –

QT-CD250

Pin No.

5

6*

7*

8*

3

4

1*

2

9*

10*

11*

IC802 VHiTC9457F2-1: Servo/Signal Control (TC9457F2) (1/4)

12*

13*

14*

15

16

17

18

19

20

25

26

27

28

29

21*

22*

23

24

Port Name Terminal Name

(OT5)S1

(OT6)S2

(OT7)S3

(OT8)S4

(OT9)S5

(OT10)S6

(OT11)S7

(OT12)S8

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

SEG8

(OT13)S9 SEG9

(OT14)S10 SEG10

(CLCK/OT15) SEG11

S11

(DATA/OT16) SEG12

S12

(SFSY/OT17) SEG13

S13

(LRCK/OT18) SEG14

S14

(BCK/S15)

P8-0

SEG15

(AOUT/S16) SEG16

P8-1

(MBOV/S17) SEG17

P8-2

(IPF/S18)

P8-3

NC

MVDD

MVSS

MVDD1

MVSS1

(K0)P1-0

(K1)P1-1

(K2)P1-2

(K3)P1-3

CD-FUNC

TUNER-FUNC

DOOR IN

PU IN

(DCREF)P3-0 CD POWER

(ADin1)P3-1 KEY 1

(ADin2)P3-2 KEY 2

(ADin3)P3-3 ADIN 3

(BUZR/

ADin4)P4-0

NC

Input/Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Function

Segment signal output to the LCD panel.

Up to 72 segments in a matrix with COM1 to COM4 can be displayed.

All of the S1 to S18 pins can be switched for output ports by a program.

Also, the S15 to S18 pins each can be switched for I/O ports individually.

When set for I/O ports, these pins become Nch open-drain output.

Furthermore, the S11 to S14 and the P8-0 to P8-3 pins can be switched for use as CD signal (CLCK to IPF) input/output pins by a program.

• CLCK: Subcodes P thru W data readout clock input/output.

Selected between input and output by a command.

• DATA: Subcodes P thru W data output.

• SFSY: Playback system frame sync signal output.

• LRCK: Channel clock (44.1kHz) output.

It outputs a low for L channel and a high for R channel.

Polarity can be inverted by a command.

• BCK : Bit clock (1.4122MHz) output.

• AOUT: Audio data output.

• MBOV: Buffer memory-over signal output.

It outputs a high when buffer overflows.

• IPF : Correction flag output. When AOUT is C2 correction output, it

outputs a high indicating that correction is impossible.

Input/Output Power supply pins.

Input/Output Normally, apply a voltage of 4.5 to 5.5V to VDD.

In a backup state (when the CKSTP instruction executed), the device's current consumption is reduced to 1

µ

A or less, allowing for the supply voltage to be lowered to 2.0V.

The device is reset and the program starts from address 0 when a voltage of 2.7V or more is applied to this pin when it is at 0V (power-on reset).

Input

Input

Input

Input

4-bit CMOS I/O ports.

These ports can be set for input or output bit for bit by a program.

These pins can be pulled up to VDD or down to GND by program.

Therefore, they can be used as key input pins. Also, when they are set for

I/O port, a change of state in this input can be used to clear the clock stop or wait mode.

Output

Input

Input

Input

Input



The P3-0 to P4-0 pins serve dual purposes as analog inputs for the internal

6-bit 4-channel A/D converters.

The internal A/D converters can complete conversion in 6 instruction cycles using a successive approximation method. The required pins can be set for

A/D analog input bit for bit by a program. P3-0 can be set for reference voltage input, and the internal power supply (MVDD) can be used for this reference voltage.

The P4-0 pin serves dual purposes as a buzzer output pin.

The buzzer output can be selected from 8 frequencies, 0.625 to 3kHz.

Each selected frequency can be output in one of four modes: continuous, single, 10Hz intermittent, and 10Hz intermittent at 1Hz interval.

Whether or not to use and how to control the A/D converter and buzzer all can be set by a prograam.


– 24 –

QT-CD250


Pin No.

30

31*

32*

33

34

35

36

37

38

39*

40*

41*

42*

43*

44*

45*

46

47

60

61

62

56

57

58

59

51

52

53

54

55

48

49

50

Port Name Terminal Name

(S12)P4-1

(SO/S11/

SDA)P4-2

(SCK/SCL) CL

P4-3

DI

DO

SBOK

VDD

VSS

P2VREF

PDO

TMAX

LPFN

LPFO

PVREF

VCOF

AVSS

SLCO

RFI

AVDD

RFCT

RFZI

RFRP

FEI

TEST0

TEST1

TEST2

TEST3

TEST4

TEST5

TEST0

TEST1

TEST2

TEST3

TEST4

TEST5

(OT19)/HSO CE_(PLL)

(OT20)SPCK STB_(VOL)

(OT21)SPDA P_MUTE

(OT22)COFS X-BASS

DOUT

SBSY

(N/C)

(N/C)

(N/C)

VDD1

VSS1

P2VREF

PDO

TMAX

LPFN

LPFO

PVREF

VCOF

AVSS

SLCO

RFI

AVDD

RFCT

RFZI

RFRP

FEI


Input

Output

Output


DI: Tuner Data Input pin.

DO: Tuner Data Output pin.

CL: Tuner/Volume Clock Output pin.


These pins serve dual purposes as input or output pins for the serial interface circuit (SIO).

The SIO is a 2-wire/3-wire compatible serial interface. 4 or 8 bits of serial data, beginning with the MSB or LSB, are serially output from the SO/SDA, pin at each clock edge on the SCK/SCL pin, and the data on S11 or S12 pin is serially input to the device.

The serial clock (SCK/SCL) allows selection between the internal (450/225/

150/75 kHz) and external sources and a selection of the active edge, rise or fall. Moreover, since the clock and data can be output via Nch open-drain outputs, variouts, device controls and communication between controllers can be greatly facilitated.

When an SIO interrupt is enabled, an interrupt is generated at completion of SIO execution and the program jumps to address 4.

All inputs to SIO contain a Schmitt trigger circuit.

Test mode control input pins.

The test mode is selected when these pins are set high and normal operation is selected when they are low.

Input

Input

Input

Input

Input

Input

Output

Output

Output

Output

CE_(PLL): Tuner Chip Enable Input pin.

STB_(VOL): Volume Storobe Input pin.

P_MUTE: MUTE ON/OFF Output pin.

X-BASS: X-BASS ON/OFF Output pin.

Input/Output Digital output pin.

Input/Output Subcode block sync output pin. It outputs a high at the S1 position when subcode sync is detected.

Input/Output Subcode Q data CRCC determination result output pin. It outputs a high when CRCC check is found OK.

Input/Output CD unit's digital block power supply pins.

Input/Output Normally, apply 5V to VDD.

When not using a CD (CD off), this power supply can be turned off, with only the controller power supply kept active, so that the contrller alone is operating. In this case, the CD off bit must be set to 1. When this bit is set to 1, pins 11 through 18 and pins 39 through 42 all are changed for output ports if they have been set for CD control signal input/output pins.

Input/Output PLL block-2 VREF pin.

Input/Output This pin outputs a phase error between EFM and PLCK signals.

Input/Output TMAX detection result output pin.

Selected by command bit TMPS.

Longer than preset period: Outputs P2VREF.

Shorter than preset period: Low level (Vss).

Within preset period: High impedance.

Input/Output Inverted input of low-pass filter amp.

Input/Output Output of low-pass filter amp.

Input/Output PLL block VREF pin.

Input/Output VCO filter pin.

Input/Output Analog block ground pin.

Input/Output DAC output pin for data slice level generation.

Input/Output RF signal input pin.

Input/Output Analog block power supply pin.

Input/Output RFRP signal center level input pin.

Input/Output RFRP zero-cross input pin.

Input/Output RF ripple signal input pin.

Input/Output Focus error signal input pin.


– 25 –

QT-CD250


65

66

67

68

69

Pin No.

63

64

70

71

72

73

74

75

76

77

78

79

80

85

86

87

88

89*

90

81

82

83

84

Port Name

SBAD

TEI

TEZI

FOO

TRO

VREF

RFGC

TEBC

FMO

DMO

2VREF

SEL

VDD

VDD

XVSS

XI

XO

XVDD

DVSR

RO

DVRR

DVDD

DVRL

LO

DVSL

NC

NC/VPP

/RST

Terminal Name

SBAD

TEI

TEZI

FOO

TRO

VREF

RFGC

TEBC

FMO

DMO

2VREF

SEL

VDD2

VSS2

XVSS

XI

XO

XVDD

DVSR

RO

DVRR

DVDD

DVRL

LO

DVSL

NC

NC

RESET


Input/Output Subbeam add signal input pin.

Input/Output Tracking error input pin.

This input is read when tracking servo is on.

Input/Output Tracking error zero-cross input pin.

Input/Output Focus equalizer output pin.

Input/Output Tracking equalizer output pin.

Input/Output Analog reference power supply pin.

Input/Output RF amplitude adjusting control signal output pin. It outputs 3-level PWM signals. (PWM carrier = 88.2kHz)

Input/Output Tracking balance control signal output pin. It outputs 3-level PWM signals.

(PWM carrier = 88.2kHz)

Input/Output Focus equalizer output pin. It outputs 3-level PWM signals.

(PWM carrier = 88.2kHz)

Input/Output Disc equalizer output pin. It outputs 3-level PWM signals.

(PWM carrier = DSP block 88.2kHz, synchronized to PXO)

Input/Output Analog reference power supply pin. (2 x VREF)

Input/Output APC circuit on/off signal output pin.

When laser is on, this pin goes to a high-impedance state when UHS = low and outputs a high when UHS = high

Input/Output CD unit's digital block power supply pins.

Input/Output Normally, apply 5V to VDD.

When not using a CD (CD off), this power supply can be turned off, with only the controller power supply kept active, so that the contrller alone is operating. In this case, the CD off bit must be set to 1. When this bit is set to 1, pins 11 through 18 and pins 39 through 42 all are changed for output ports if they have been set for CD control signal input/output pins.

Input/Output CD's crystal oscillator power supply pins.

Normally, connect these pins to the power supply lines that are used in common for the VDD and VSS pins.

Input/Output CD's crystal oscillator input/output pins.

Input/Output Normally, connect 16.934MHz here. This clock is used as the system clock for the CD. After a system reset, it also is used as the system clock on the controller side.

Input/Output CD's crystal oscillator input/output pins.

Normally, connect these pins to the power supply lines that are used in common for the VDD and VSS pins.

Input/Output R-channel D/A converter unit ground pin.

Input/Output R-channel data forward output pin.

Input/Output R-channel reference voltage pin.

Input/Output D/A converter unit power supply pin.

Input/Output L-channel reference voltage pin.

Input/Output L-channel data forward output pin.

Input/Output L-channel D/A converter unit ground pin.

Input/Output NC pins. Normally, connect these pins to ground or leave them open.

Input/Output

Input Device's system reset signal input pin.

The device remains reset while RESET is held low and when RESET is released back high, the CD unit becomes operational and the program starts from address 0. Normally, a system reset is asserted when a voltage of 2.7V or more is applied to VDD when it is at 0V (power-on reset).

Therefore, this pin must be pulled high when used for this purpose.


– 26 –

QT-CD250


Pin No.

91

92

93*

94*

95

96

97

98

99

100

Port Name

/HOLD

INTR

MXO

MXI

MVSS

MVDD

OT1

OT2

OT3

OT4

Terminal Name

HOLD

REMO-IN

MXO

MXI

MVSS

MVDD

COM1

COM2

COM3

COM4


Input This pin is used to input a signal that requests or clears the hold mode.

Normally, use this pin for CD mode select signal input or battery detection signal input.

There are two hold modes: clock stop mode (crystal oscillator turned off) and a wait mode (CPU stopped). These modes are entered by executing the CKSTP and WAIT instructions, respectively.

The clock stop mode can be requested by a programmed input: low level detection on HOLD pin or forced execution, and can be cleared by detecting a high on the HOLD pin or a change of state in its input signal.

When the CKSTP instruction is executed, the clock generator and the CPU stop operating and the device is placed in a memory backup state. During this state, the device's current consumption is reduced to 1

µ

A or less.

At the same time, the display output and CMOS output ports are automatically set low, and the Nch open-drain outputs are turned off.

The wait mode is executed regardles of the input state on the HOLD pin, with the device's current consumption reduced.

This mode is cleared by a change of state in the HOLD input.

Input External interrupt input pin.

When the interrupt facility is enabled and a pulse of 1.11 to 2.22

µ s in duration is applied to this pin, an interrupt is generated and the program jumps to address 1. Input logic and the active edge (rise or fall) can be selected for each interrupt input.

Also, the internal 8-bit time clock can be chosen for this interrupt input, in which case it is possible to count pulses or generate an interrupt at a given pulse count (address 3).

Input/Output Crystal oscillator pins for the controller.

Input/Output The oscillator clock is used as the timebase for the clock facility or as the controller's system clock. Connect a 4.5MHz or 75kHz crystal resonator to the MXO and MXI pins. Since these pins do not contain internal feedback resistors, etc, an amp resistor or output resistor must be added external to the chip.

When using the clock generated by the CD unit's crystal oscillator for clocking the entire device operation, fix the MXI pin to the GND level.

Oscillation is stopped by executing a CKSTP instruction.

Select the crystal oscillator and control its operation by a program.

Input/Output Power supply pins.

Input/Output Normally, apply a voltage of 4.5 to 5.5V to VDD.

In a backup state (when the CKSTP instruction executed), the device's current consumption is reduced to 1

µ

A or less, allowing for the supply voltage to be lowered to 2.0V.

The device is reset and the program starts from address 0 when a voltage of 2.7V or more is applied to this pin when it is at 0V (power-on reset).

Output

Output

Output

Output

Common signal outputs to the LCD panel.

Up to 72 segments in a matrix with S1 to S18 can be displayed.

Three voltage levels MVDD, VEE (1/2 MVDD), and GND are output for

83Hz period at 2ms intervals.

After a system reset and after deassertion of a clock stop instruction, the

VEE voltage is output and the DISP OFF bit is set to 0 before common signals are output.


– 27 –

QT-CD250

— M E M O —

– 28 –

QT-CD250

PARTS GUIDE

MODEL

QT-CD250

“HOW TO ORDER REPLACEMENT PARTS”

To have your order filled promptly and correctly, please furnish the following information.

1. MODEL NUMBER 2. REF. No.

For U.S.A. only

Contact your nearest SHARP Parts Distributor to order.

3. PART NO.

4. DESCRIPTION

For location of SHARP Parts Distributor,

Please call Toll-Free;

1-800-BE-SHARP

MARK: SPARE PARTS-DELIVERY SECTION

Explanation of capacitors/resistors parts codes

Capacitors

VCC ....................... Ceramic type

VCK ........................ Ceramic type

VCT ........................ Semiconductor type

VC • • MF ............... Cylindrical type (without lead wire)

VC • • MN ............... Cylindrical type (without lead wire)

VC • • TV ................ Square type (without lead wire)

VC • • TQ ............... Square type (without lead wire)

VC • • CY ............... Square type (without lead wire)

VC • • CZ ............... Square type (without lead wire)

VC • • • • • • • • • J .. The 13th character represents capacity difference.

("J"

±

5%, "K"

±

10%, "M"

±

20%, "N"

±

30%,

"C"

±

0.25 pF, "D"

±

0.5 pF, "Z" +80-20%.)

If there are no indications for the electrolytic capacitors, error is

±

20%.

Resistors

VRD ....................... Carbon-film type

VRS ........................ Carbon-film type

VRN ....................... Metal-film type

VR • • MF ............... Cylindrical type (without lead wire)

VR • • MN ............... Cylindrical type (without lead wire)

VR • • TV ................ Square type (without lead wire)

VR • • TQ ............... Square type (without lead wire)

VR • • CY ............... Square type (without lead wire)

VR • • CZ ............... Square type (without lead wire)

VR • • • • • • • • • J .. The 13th character represents error.

("J"

±

5%, "F"

±

1%, "D"

±

0.5%.)

If there are no indications for other parts, the resistors are

±

5% carbon-film type.

NOTE:

Parts marked with “ ” are important for maintaining the safety of the set.

Be sure to replace parts with specified ones for maintaining the safety and performance of the set.

QT-CD250

NO.

PARTS CODE

PRICE

RANK

DESCRIPTION

INTEGRATED CIRCUITS

IC1

IC51

IC101

IC201

IC202

IC801

IC802

IC803

VHITA2104BN-1

VHILC72121/-1

VHIBA3311L/-1

VHITA8227P/-1

VHITC9260P/-1

VHITA2109F/-1

VHITC9457F2-1

VHILA6541D/-1

J AQ FM/AM IF MPX.,TA2104BN

J AN Electronic Tuning,LC72121

J AK REC./P.B.Equalizer Amp.,

BA3311L

J AH Power Amp.,TA8227P

J AN Electronic Volume,TC9260P

J AL Servo Pre Amp.,TA2109F

J AZ Servo/Signal Control,TC9457F2

J AW Focus/Tracking/Spin/Sled Driver,

LA6541D

TRANSISTORS

Q1

Q2

Q201,202

Q203

Q204

Q205

Q206

Q207

Q209~212

Q351

Q801

Q802

Q803

Q804

Q805

Q806

DIODES

VSKTC3199GR-1 J AB Silicon,NPN,KTC3199 GR

VSKRA102M//-1 J AC Digital,PNP,KRA102 M


VSKTA1266GR-1 J AB Silicon,PNP,KTA1266 GR

VSKTA1273Y/-1 J AE Silicon,PNP,KTA1273 Y


VSKTA1046Y/-1 J AC Sillicon,PNP,KTA1046 Y






VSKRC107M//-1 J AC Digital,NPN,KRC107 M


VSKRC107M//-1 J AC Digital,NPN,KRC107 M


D1

D101,102

D201~205

D651~654

D801~806

VD1,2

VD3

ZD201

ZD202

ZD203

FILTERS

VHD1N4148//-1

VHD1N4148//-1

VHD1N4148//-1

VHD1N4004//-1

J AA Silicon,1N4148

J AA Silicon,1N4148

J AA Silicon,1N4148

J AB Silicon,1N4004

VHD1N4148//-1 J AA Silicon,1N4148

VHCKV1370NT-1 J AG Variable Capacitance,KV1370NT

VHCKV1520NT-1 J AK Variable Capacitance,KV1520NT

VHEDZ5R1BSB-1 J AC Zener,5.1V,DZ5.1BSB

VHEDZ7R5BSB-1 J AB Zener,7.5V,DZ7.5BSB

VHEDZ2R4BSB-1 J AB Zener,2.4V,DZ2.4BSB

CF1

CF3

CF4

F1

RFILF0006SJZZ

RFILA0003SJZZ

RFILF0005SJZZ

RFILR0001SJZZ

J AE FM IF

J AF AM IF

J AF FM Detection

J AD FM Band Pass Filter

TRANSFORMERS

T3

!

T651

COILS

RCILI0008SJZZ J AC AM IF

RTRNP0036SJZZ J AQ Power

COR1

COR801

L1

L2

L3

L4

L51

L301

L801

L803

L807

RCORF0005SJZZ J AB Core

RCORF0005SJZZ J AB Core

RCILR0004SJZZ

RCILB0015SJZZ

RCILA0011SJZZ

J

J

J

AE

AC

AC

FM RF

FM Oscillation

AM Bar Antenna

RCILB0014SJZZ

VP-DH101K0000

J AC AM Oscillation

J AB 100

µ

H,Choke

RCILB0003SJZZ

VP-DH221K0000

J AD Bias Oscillation

J AB 220

µ

H,Choke

VP-DH221K0000 J AB 220

µ

H,Choke

VP-DHR82K0000 J AE 0.82

µ

H,Choke

VARIABLE CAPACITOR

TC1 RTO-H1003SJZZ J AG Trimmer

VIBRATORS

X51 RCRSP0003SJZZ J AL Crystal,4.5 MHz

X801

X802

NO.

PARTS CODE

PRICE

RANK

DESCRIPTION

RCRM-0002SJZZ J AE Ceramic,16.93 MHz

RCRM-0003SJZZ J AK Ceramic,4.19 MHz

CAPACITORS

C113,114

C115,116

C117,118

C119

C120

C121,122

C123

C201

C202

C203

C204

C205,206

C207

C208

C209

C210

C52

C53

C54

C55

C56

C57,58

C59

C60

C61

C68

C71,72

C73,74

C75

C105,106

C107,108

C109,110

C111,112

C211,212

C213,214

C215,216

C217,218

C219,220

C221,222

C223,224

C225

C226

C227

C229~232

C233,234

C235~238

C239,240

C241,242

C16

C18

C19

C20

C21

C22

C23

C24

C25

C26

C27

C29

C32

C33,34

C51

C9

C10

C11

C12

C13

C14

C15

C1

C2

C3

C5

C6

C7,8

VCCCPA1HH150J J AA 15 pF (CH),50V

VCKYPA1HB102K J AA 0.001

µ

F,50V

VCKZPA1HF103Z J AA 0.01

µ

F,50V

VCKYTV1EF104Z J AA 0.1

µ

F,25V



µ

F,50V


µ

F,50V

VCCUPA1HJ8R0D J AA 8 pF,50V

VCCSPA1HL361J J AA 360 pF,50V

RC-GZA105AF1H J AB 1

µ

F,50V,Electrolytic

RC-GZA474AF1H J AA 0.47

µ

F,50V,Electrolytic


µ

F,50V

RC-GZA227AF1A J AB 220

µ

F,10V,Electrolytic

RC-GZA475AF1H J AB 4.7

µ

F,50V,Electrolytic

VCKYTV1HB102K J AA 0.001

µ

F,50V


µ

F,50V,Electrolytic

VCKYPA1HB331K J AA 330 pF,50V

RC-GZA106AF1C J AB 10

µ

F,16V,Electrolytic


µ

F,50V,Electrolytic


µ

F,16V,Electrolytic

VCTYPA1CU104M J AB 0.1

µ

F,16V


µ

F,50V

VCTYPA1CU104M J AB 0.1

µ

F,16V


µ

F,50V



µ

F,25V

VCKYTV1HB221K J AA 220 pF,50V




µ

F,10V,Electrolytic


µ

F,50V


µ

F,50V,Electrolytic


µ

F,50V



µ

F,50V


µ

F,50V


µ

F,10V,Electrolytic


VCQYKA1HM223K J AB 0.022

µ

F,50V,Mylar


µ

F,50V,Electrolytic


VCKYPA1HB182K J AB 0.0018

µ

F,50V





µ

F,16V,Electrolytic


µ

F,50V,Mylar


µ

F,16V,Electrolytic


µ

F,50V,Electrolytic


µ

F,16V,Electrolytic


µ

F,50V


µ

F,10V,Electrolytic


µ

F,16V,Electrolytic


µ

F,16V,Electrolytic


µ

F,50V


µ

F,50V


µ

F,16V,Electrolytic

RC-GZA477AF1A J AC 470

µ

F,10V,Electrolytic


µ

F,50V


µ

F,50V


µ

F,50V


µ

F,50V


µ

F,50V,Electrolytic


µ

F,50V,Mylar


µ

F,50V,Mylar


µ

F,50V,Electrolytic


µ

F,50V


µ

F,50V,Electrolytic


µ

F,10V,Electrolytic


µ

F,50V

RC-GZW478AF1C J AF 4700

µ

F,16V,Electrolytic


µ

F,50V,Electrolytic

RC-GZA477AF1A J AC 470

µ

F,10V,Electrolytic


µ

F,10V,Electrolytic


µ

F,50V,Mylar


µ

F,50V,Electrolytic

– 1 –

R13

R14

R15

R16

R17

R18

R20

R1

R2,3

R4

R5

R6

R7

R8

R10

R12

R51

R52

R53

R54

R55

R58~62

NO.

PARTS CODE

PRICE

RANK

DESCRIPTION

C823

C824,825

C826

C827

C828

C829

C830

C832

C833

C834,835

C836~839

C840

C841,842

C843

C844

C845

C846

C847,848

C849,850

C851,852

C853

C854

C856

C862

C863

C864

C865

C870

C872

C243,244

C245

C246

C247

C249

C302

C351

C352

C353

C354

C651~654

C801

C802

C804

C805

C806

C807

C810

C813

C814

C815

C816

C817

C818

C819,820

C821

C822



µ

F,50V,Electrolytic


µ

F,16V,Electrolytic


µ

F,10V,Electrolytic



µ

F,50V

VCQYKA1HM222K J AA 0.0022

µ

F,50V,Mylar


µ

F,10V,Electrolytic


µ

F,50V,Mylar


µ

F,50V,Mylar


µ

F,50V


µ

F,50V


µ

F,50V

VCCCPA1HH2R0C J AA 2 pF (CH),50V


µ

F,25V


µ

F,10V,Electrolytic


µ

F,50V


µ

F,16V,Electrolytic


µ

F,16V,Electrolytic


µ

F,50V


µ

F,16V,Electrolytic


µ

F,50V


µ

F,10V,Electrolytic



µ

F,50V,Mylar


µ

F,10V,Electrolytic


µ

F,50V


µ

F,25V


µ

F,16V,Electrolytic



µ

F,50V,Mylar


µ

F,50V


µ

F,50V


µ

F,50V,Mylar


µ

F,16V,Electrolytic


µ

F,50V,Mylar



µ

F,50V,Mylar


µ

F,25V


µ

F,50V


µ

F,16V,Electrolytic


µ

F,10V,Electrolytic


µ

F,50V


µ

F,50V,Electrolytic


µ

F,16V,Electrolytic


µ

F,50V


µ

F,50V,Electrolytic


µ

F,50V


µ

F,50V



µ

F,25V


µ

F,16V,Electrolytic


µ

F,25V


µ

F,10V,Electrolytic


VCKYTV1HB472K J AA 0.0047

µ

F,50V

RESISTORS

VRD-ST2CD332J J AA 3.3 kohms,1/6W

VRD-ST2CD104J J AA 100 kohm,1/6W

VRD-ST2CD100J J AA 10 ohm,1/6W

VRD-ST2CD223J J AA 22 kohms,1/6W




VRD-ST2CD331J J AA 330 ohms,1/6W



VRS-TV2AB222J J AA 2.2 kohms,1/10W





VRS-TV2AB471J J AA 470 ohms,1/10W







– 2 –

NO.

R803

R804

R805

R806

R807

R808

R811

R351

R352

R353

R354

R455,456

R457,458

R801

R802

R225

R227,228

R230

R231,232

R233,234

R235,236

R237,238

R239,240

R241,242

R243,244

R245,246

R247,248

R249

R250

R251,252

R253

R125

R126

R201

R202

R203

R204

R205

R206,207

R209,210

R211,212

R213

R214~216

R217,218

R219,220

R221~224

R71,72

R73,74

R76

R77

R101,102

R103,104

R105,106

R107,108

R109,110

R113,114

R115~118

R119,120

R121,122

R123,124

R812

R820

R821

R824,825

R826

R827

R828

R829

R830

R831~834

R835,836

R837,838

R839

R840

R841

R842

R843

R844,845

R846

R847

R848

R849

QT-CD250

PARTS CODE

PRICE

RANK

DESCRIPTION




VRS-TV2AB332J J AA 3.3 kohms,1/10W




























VRD-ST2EE2R7J J AA 2.7 ohms,1/4W

















VRD-ST2CD4R7J J AA 4.7 ohms,1/6W



VRD-ST2EE220J J AA 22 ohms,1/4W











VRS-TV2AB102J J AA 1 kohm,1/10W











VRD-ST2EE100J J AA 10 ohm,1/4W









QT-CD250

NO.

R850

R851~853

R854

R855

R856

R857

R860

R861

R862

R863

R864

R865

R866

R867~873

R875~878

R879

R882~895

R896,897

R898~901

PARTS CODE

PRICE

RANK

DESCRIPTION










VRS-TV2AB182J

VRS-TV2AB105J

J

J

AA

AA

1.8 kohms,1/10W

1 Mohm,1/10W







VRS-TV2AB473J J AA 47 kohms,1/10W


OTHER CIRCUITRY PARTS

BI801/CNS801 QCNWN0158SJZZ J AF Connector Ass’y,8/8Pin

BI802/CNS802 QCNWN0159SJZZ J AD Connector Ass’y,5/5Pin

BI803/CNS803 QCNWN0115SJZZ J AE Connector Ass’y,6/6Pin

CNP101 QCNCW001DSJZZ J AC Plug,4Pin

CNP201

CNP602

CNP801

CNP803

QCNCW001CSJZZ J

QCNCW002CSJZZ J

QCNCM010DAWZZ J

QCNCM932FAFZZ J

AC

AD

AC

Plug,3Pin

Plug,3Pin

Plug,4Pin

Plug,6Pin

CNS101

CNS201

CNS602

CNS801

FW801

FW802

HPJ201

LCD801

QCNWN0010SJZZ

QCNWN0157SJZZ

QCNWN0165SJZZ

J

J

J

QCNCW010DAWZZ J

AG Connector Ass’y,4Pin

AC

AC

Connector Ass’y,3Pin



QCNWN0166SJZZ J AD Flat Wire,12Pin

QCNWN0167SJZZ J AD Flat Wire,11Pin

QJAKM0001SJZZ J AG Jack,Headphone

RV-LX0009SJZZ J AM LCD Display

!

!

M601(240-6) 9GD192112346

M701 RMOTV0409AFM1

J

J

AX

AN

Motor with Pulley [Tape]

Motor with Gear [Sled]

M702

SO651

RMOTV0408AFM3 J AN Motor with Chassis [Spindle]

QSOCA0001SJZZ J AE AC Inlet Socket or

SO651

SP201,202

SW102

SW201

QSOCA0005SJZZ J AE AC Inlet Socket

RSPA10001SJ4P J Speaker,Woofer

QSW-S0001SJZZ J AD Switch,Slide Type

[Record/Playback]

QSW-S0008SJZZ J AG Switch,Slide Type

SW601(240-7) 9GD640101149

SW702

SW801

QSW-F9001AWZZ

QSW-K0001SJZZ

J

J

J

AE

AC

[Function Selector]

Switch,Leaf Type [Tape Main]

Switch,Push Type [Pickup In]

Switch,Key Type

SW802

SW803

SW804

[Play/Pause/Tuning Up]

QSW-K0001SJZZ J AC Switch,Key Type

[Stop/Tuning Down]

QSW-K0001SJZZ J AC Switch,Key Type [Repeat/Band]

SW805


[Tuner/Memory]


[Cue/Preset Up]

SW806

SW807

SW808

SW809

SW810

UN801


[Review/Preset Down]

QSW-K0001SJZZ J AC Switch,Key Type [Volume Up]

QSW-K0001SJZZ J AC Switch,Key Type [Volume Down]

QSW-K0001SJZZ J AC Switch,Key Type [X-BASS]

QSW-F0001SJZZ J AD Switch,Leaf [CD Lid]

VHLN64H380A-1 J AK Remote Sensor,N64H380A

301

302

303

304

305

!

306

701

702

703

704

M701

CD MECHANISM PARTS

NGERH0586AFZZ J AC Gear,Middle

NGERH0587AFZZ J AC Gear,Drive

MLEVP1054AFZZ J AC Rail,Guide

NSFTM0291AFFW J AD Shaft,Guide

PCUSG0613AFZZ J AC Cushion

DCTRH8003SJ01 J BC Pickup Unit Ass’y

XBSSD26P06000 J AA Screw,ø2.6

×

6mm

XHBSD20P05000 J AA Screw,ø2

×

5mm

XBBSD20P03000 J AA Screw,ø2

×

3mm

LX-WZ1070AFZZ J AA Washer,ø1.5

×

ø3.8

×

0.25mm

RMOTV0409AFM1 J AN Motor with Gear [Sled]

NO.

M702

SW702

PARTS CODE

PRICE

RANK

DESCRIPTION

RMOTV0408AFM3 J AN Motor with Chassis [Spindle]

QSW-F9001AWZZ J AE Switch,Push Type [Pickup In]

CABINET PARTS

229

230

231

232

233

234

235

221

222

223

224

225

226

227

228

236

237

238

239

240

214

215

216

217

218

219

220

208

209

210

211

212

213

201

202

203

204

204- 1

204- 2

204- 3

205

206

207

GCABA1045SJM1 J AR Front Cabinet

GCABB1045SJSA J AR Top Cabinet

GFTAT1004SJSB J AD CD Lid

CHLDM1001SJ01 J AG Stabilizer Ass’y

PMAGF0002AWZZ J AE Magnet

LHLDM1001SJZZ J AC Holder,Stabilizer

PSHEZ0003SJZZ J AG Sheet,Stabilizer Holder

GFTAB1009SJSB J AD Battery Compartment Lid,Rear

GFTAC0004SJSB J Cassette Holder

GCOVA1002SJSA J AB Cover,Remote Sensor

HPNLC1052SJSA J AB Panel,Control

HDECQ0038SJSA J AD Ring,Speaker

LHLDZ1028SJZZ

JBTN-0013SJSB

JBTN-0014SJSB

JBTN-0015SJSB

JBTN-0016SJSB

JBTN-0017SJSB

JBTN-0018SJSB

J AC Holder,CD Control PWB

J

J

J

AB

AB

AB

Button,Pause

Button,Stop/Eject

Button,Fast Forward

J AB Button,Rewind

J AB Button,Play

J AB Button,Record

JHNDP1003SJSB J AG Handle

JKNBK0026SJSA J AB Knob,X-BASS/Volume

JKNBZ0043SJSA J AD Knob,Function

JKNBZ0044SJSA J AB Button,CD Stop

JKNBZ0045SJSA J AC Button,CD Play/Pause

CGERH0001SJ01 J AF Damper Gear Ass’y

LANGK0001SJFW J AC Bracket,Button

LANGZ0004SJZA J

LHLDA1001SJZZ J AC

Bracket,Battery

Holder,AM Bar Antenna

LHLDW1001SJZZ J AD Nylon Band

RCORF0002SJZZ J AC Core

LHLDZ1027SJZZ J AB Holder,LCD

MSPRC0004SJFN J AB Spring,Battery,-

MSPRC0005SJFD J AB Spring,Battery,+/-

MSPRD0002SJFD J AC Spring,CD Lid

MSPRD0009SJFD J AB Spring,Cassette Holder Up

MSPRZ0002SJFD J AB Spring,Rod Antenna

LHLDZ1029SJZZ J AD Holder,CD Switch PWB

PGUMS0001SJZZ J AB Cushion,CD Lid

PSLDM3003SJFW J AB Bracket,Shield

QANTR0003SJZZ J AL Rod Antenna

MSPRP0002SJFW J AC Bracket,Record

HDECQ0039SJSA J AD Decoration Plate,LCD Display

CMECB0003SJ01 J AZ Tape Mechanism Ass’y

240- 1

240- 2

240- 3

240- 4

240- 5

240- 5

9GD192104309

9GD19210703

9GD19210938

9GD62140116

9GD62071008

9GD62091010

J AR Pinch Roller Arm Ass’y

J AE Belt,REW/FF

J Belt,Main

J AT Head,Record/Playback

J AQ Head,Erase

J AM Head,Erase

240- 6(M601) 9GD192112346

240- 7(SW601) 9GD640101149

241

242

MSPRC0003SJFE

PRDAR0029SJZZ

J

J

J

J

AX

AF

AC

Motor with Pulley [Tape]

Switch,Leaf Type [Tape Main]

Spring,Battery,-

Heat Sink,Q206

243

244

245

601

602

603

604

605

606

607

610

PRDAR0030SJZZ

GFTAB1010SJSA

J

J AD

Heat Sink,IC201

Battery Compartment Lid,Bottom

QCNWN0222SJZZ J

XUBSD30P18000 J

Lead Wire with Lug

Screw,ø3

×

18mm

XUBSD25P10000 J AB Screw,ø2.5

×

10mm

XUPSD25P08000 J AB Screw,ø2.5

×

8mm

XUBSD30P10000 J AA Screw,ø3

×

10mm

XUBSD30P12000 J AA Screw,ø3

×

12mm

XUPSD25P08000 J AB Screw,ø2.5

×

8mm

XWHSD28-08120 J AB Washer,ø2.8

×

ø12

×

0.8mm

XHPSD20P03000 J AA Screw,ø2

×

3mm

PACKING PARTS (For Central America)

SPAKA0036SJZZ J AG Packing Add.,Left/Right

SPAKC0112SJZZ J Packing Case

SPAKZ0013SJZZ J AB Top Pad,Packing Case

SSAKH0001SJZZ J AC Polyethylene Bag,Unit

SSAKK0002SJZZ J AC Polyethylene Bag,

TLABR1098SJZZ

TLABZ0015SJZZ

J

AC Power Supply Cord

Label,Bar Code,Packing Case

J AC Label,VJ No.,Packing Case

– 3 –

NO.

PARTS CODE

PRICE

RANK

DESCRIPTION

ACCESSORIES

!

QACCU0001SJ00 J AR AC Power Supply Cord

TINSE0040SJZZ

TLABZ SJZZ

J

J

AC Operation Manual

Label,Feature

RRMCG0023SJSA J AU Remoto Control

J Battery Lid,Remoto Control

P.W.B. ASSEMBLY (Not Replacement Item)

PWB-A1~7 DCEK-0008SJ03 J — Main/CD Control/Power/Switch/

Terminal A/Terminal B/Washer

(Combined Ass’y)

QPWBF3895AFZZ J AC CD Motor (PWB Only) PWB-B

OTHER SERVICE PART

UDSKA0004AFZZ J AZ CD Pickup Lens Cleaner

QT-CD250

– 4 –

QT-CD250

306

A

B

C 702

701

304

704

302

301

701

D

303

703x2

E

M702

F

G

H

1

305

M701

305x2

SW702

2 3 4

Figure 5 CD MECHANISM EXPLODED VIEW

– 5 –

5

PWB-B

6

A

B

C

D

E

F

G

QT-CD250

206 217

237 205

223

216

215

214

213

212

211

235

605x2

222

202

240(240-1,

240-2, 240-3,

240-4, 240-5

240-6(M601),

240-7(SW601))

603x2

235 231

604

203

605x2

204-1

204-2

204

204-3

238 239

604x4

610

TAPE

MECHANISM

Silicon

Grease

PWB-A2

603x6

LCD801

210

243

PWB-A1

236

208

603x4

228

220

221

218

219

207

201

SP201

606

232

PWB-A7

234

233

PWB-A4

601x2

604x7

604x4

245

SW810

227

225

606

Silicon

Grease

242

Q206

603

604

607x3

CD

MECHANISM

602x3

605x2

605x2

SO651

PWB-A5

T651

224

241x3

209

244

230

SP202

229

PWB-A6

604x4

PWB-A3

BELT CONNECTION

Main Belt

Flywheel

Motor

M601

605x3

209

226

FF/REW Belt

REW/FF

Clutch

H

Note: Only the unit and consumale parts are supplied as parts supply for the Tape mechanism.

1 2 5 3 4

Figure 6 CABINET EXPLODED VIEW

– 6 –

6

QT-CD250

PACKING OF THE SET (FOR U.S.A ONLY)

•

Setting position of switches and knobs

Tape Mechanism Control

FUNCTION SELECTOR

STOP STATE

OFF/TAPE

Polyethylene Bag, Unit

SSAKH0001SJZZ

Operation Manual

Packing Add., Left/Right

SPAKA0036SJZZ

L

FRONT

AC Power

Supply Cord

R

Feature Label

Polyethylene Bag,

AC Power Supply Cord

SSAKK0002SJZZ

Top Pad, Packing Case

SPAKZ0013SJZZ

Remote

Control

FRONT

Packing Case

SPAKC0112SJZZ

FRONT

Bar Code Label

TLABR1098SJZZ

VJ No. Label

TLABZ0015SJZZ

: Not Replacement Item

COPYRIGHT

©

2000 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

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.

SHARP CORPORATION

Communication Systems Group

Quality & Reliability Control Center

Higashihiroshima, Hiroshima 739-0192, Japan

Printed in Japan

A0003-????NS•HA•C

SC • LAG

SHARP QT CD250 audio system SERVICE MANUAL

Assistant Bot

SERVICE MANUAL

No. S2014QTCD250/

CONTENTS

SHARP CORPORATION

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)

General

Power source: AC 120 V, 60 Hz

DC 9 V

[

"D" size (UM/SUM-1, R20 or HP-2) battery

×

6

]

DC 4.5 V

[

"AA" size (UM/SUM-3,

R6 or HP-7) battery

×

3 for backup memory

]

Power

consumption: 12 W

Output power: FTC; 2.0 W min. RMS per channel into 4 ohms from 150 Hz to 20 kHz, with no more than 10 % total harmonic distortion.

RMS; 2.3 W/CH

Speakers:

Output terminals:

(DC operation, 10 % T.H.D.)

4" (10 cm) full-range speaker x 2

Headphones; 16-50 ohms

(recommended; 32 ohms)

Dimensions: Width; 15-3/4" (400 mm)

Weight:

Height; 6-1/4" (158 mm)

Depth; 8-3/8" (212 mm)

6.0 lbs. (2.7 kg) without batteries

SPECIFICATIONS

Compact disc player

Type:

Signal readout:

Audio

Compact disc

Non-contact, 3-beam semi-conductor laser pickup channels: 2

Quantization: 16-bit linear quantization

Filter: 8-times oversampling digital filter

D/A converter: 1-bit D/A converter

Wow and flutter:

Unmeasurable

(less than 0.001% W. peak)

Radio

Frequency range:

FM; 87.5 - 108 MHz

AM; 530 - 1,720 kHz

Tape recorder

Frequency response:

Signal/noise ratio:

50 - 14,000 Hz (Normal tape)

50 dB

Wow and flutter:

Motor:

0.25 % (WRMS)

DC 9 V electric governor

Bias system: AC bias

Erase system: Magnet erase

NAMES OF PARTS

REMOTE CONTROL

OPERATION MANUAL

DISASSEMBLY

REMOVING AND REINSTALLING THE MAIN PARTS

<A>

ADJUSTMENT

NOTES ON SCHEMATIC DIAGRAM

SWITCH

PWB-A4

CD CONTROL

PWB-A2

MAIN PWB-A1

TERMINAL B PWB-A6

TERMINAL A PWB-A5