2 Electrical Characteristics...........................................3

OSDPC71001
Portable DVD PL407 series
DPC-7100 series
DEC. 2006
No.:
Revision:
1.1
Date:
Service Manual for
Portable DVD PL407 series
OEM Model Name: DPC-7100 series
Name of Company
DAEWOO
Approved by
SIGNATURE
DATE
APPROVED BY
/
REVIEWED BY
/
PREPARED BY
/
Please return 1 copy for our confirmation
with your signature and comments.
Carl Chao
DATE
Revision Record
Date
Rev No
Section
15/ Mar./ 2004
0.1
New edition
30/ Mar./ 2004
0.2
Add chapter 7
3/ Sep./ 2004
1.0
DAEWOO cosmetic
17/ Jan./ 2005
1.1
IM Drawing modified
Description
Design and specifications are subject to change without notice.
All trademarks used in the specifications are the property of their respective owners.
11 G
Geenneerraall D
Deessccrriippttiioonnss....................................................................................................11
1.1 Model Features .......................................................................................... 1
1.2 Information................................................................................................ 2
22 E
Elleeccttrriiccaall C
Chhaarraacctteerriissttiiccss......................................................................................33
2.1 Optical Characteristics ............................................................................. 3
2.2 Electrical Characteristics ......................................................................... 3
2.3 System Block Diagram ............................................................................. 4
33 P
Poow
weerr ....................................................................................................................................................55
3.1 Power Supply............................................................................................. 5
3.2 Rechargeable Battery ............................................................................... 5
44 D
Diim
meennssiioonn &
&P
Phhyyssiiccaall C
Chhaarraacctteerriissttiiccss............................................77
4.1 Outline Dimension..................................................................................... 7
4.2 Physical Characteristics ........................................................................... 7
4.3 IM Drawing ............................................................................................... 8
55 R
Reegguullaattoorryy SSttaannddaarrddss..............................................................................................1122
5.1 Safety ........................................................................................................ 12
5.2 EMI........................................................................................................... 12
5.3 Ergonomics .............................................................................................. 12
66 T
Trroouubbllee SShhoooottiinngg............................................................................................................1133
6.1 Error Code Table..................................................................................... 13
6.2 Debug & Trouble Shooting..................................................................... 14
1 General Descriptions
1.1 Model Features
Video: DVD Playback, Kodak picture CD compatible & JPEG readable
Audio: CD, CD-R, CD-RW, MP3, DVD Audio (option), WMA (option) Playback
Slim Optical Pickup System for Disc Stability & Compatibility
Dolby Digital & DTS (option) Decode
7" active-matrix TFT screen, 16:9 wide aspect ratio
Progressive Scan video output (option)
Ultra slim dimension & light weight: 212mm(L) x 158mm(W) x 29.8mm(H) / 850g (around)
Slim size wireless remote control
Rechargeable battery pack
12-volt car cigarette lighter cable
Universal AC/DC power adapter
Audio/video cable for TV connection
Built-in stereo speakers
Two Stereo headphone jack
External NTSC or PAL TV-tuner module
Anti Shock Protection
-1-
1.2 Information
Disk Format
DVD, VCD, CD, MP3, CD-R, CD-RW, DVD-AUDIO (OPTION),
WMA (OPTION)
Video System
NTSC / PAL
Video Decompression
MPEG-2 (ISO/IEC-13818), MPEG-1
Video Output
1.0Vpp/75 ohm Sync, minus
Audio Characteristic
2-Channel Analog, 5.1-Channel Digital Output
Analog Output
2.0V/10k ohm
Frequency Response
DVD: 48kHz Sampling: 4Hz-22kHz; 96kHz Sampling: 4Hz-44kHz
CD: 4Hz-20kHz
S/N Ratio
<= -65dB
Dynamic Range
<= -85dB
Distortion
<= 0.01%
Digital Output
SPDIF
Headphone Jack
32ohm (30Mw) > 8ohm
LCD Display
7” active-matrix TFT type
Audio / Video Section
Audio input/output x1
Video input/output x1
S-Video / P-scan output x1 (option)
TV-tuner input x1 (option)
Audio Section
Digital Output: Coaxial x1
Headphone Jack
Headphone Jack x2
Line Voltage
AC 100-240 VAC ± 10%(50/60Hz), (Adapter)
Power Consumption
15W (12V, 1.25A)
Remote Control
DC 3V
Dimensions
212mm(L) x 158mm(W) x 29.8mm(H)
Weight
850 g (around)
Accessories
Slim Size Remote Controller with 3V Battery
12-volt Car Cigarette Lighter Cable
Universal AC/DC Power Adapter
Audio Cable / Video Cable
Rechargeable Battery Pack
S-video / P-scan cable (option)
Infra-red
-2-
2 Electrical Characteristics
2.1 Optical Characteristics
Parameter
Specifications
Unit
Screen Size
7.0 (16:9 diagonal)
inch
Display Format
1400 (H) 234 (V)
dot
Active Area
154.08 (H) 87.05 (V)
mm
Dot Pitch
0.107 (H) 0.372 (V)
mm
Pixel Configuration
Stripe
Outline Dimension
166.0 (W) 100.0 (H) 7.2 (D)(typ.)
Surface Treatment
Anti-Glare and Hard Coating
Weight
180 ± 10
mm
g
2.2 Electrical Characteristics
DVD/ SVCD/ VCD/ CD system decoding, packeted element streams and audio, video element
streams.
Fully digital servo processing (focusing, tracking, sledge and spindle servo control)
Fully digital calibration (focusing/ tracking offset and balance)
Digital phase lock loop with phase equalizer
Support Audio/ Video/ Photograph decoding and programming
TV signal encoding, interlace and progressive scan operation
Programmable Y/C delay relationship
Embedded micro-controller, up to 50MHz operating frequency
Built in PLL to allow a single 27 MHz clock source input
1.8V and 3.3V dual power supply, 208 pin PQFP
-3-
2.3 System Block Diagram
DVD Servo & Decoder
RF Amp
RF_SDEN
RF_SCK
RF_SDA
LDON
MIRR
FOCUSFOCUS+
TRACKTRACK+
LEI
FEI
TEI
SBAD
RFO
LDON
MIRR
LEI
FEI
TEI
SBAD
RFO
MVREF
TUNER_CL
TUNER_DI
RF_SDEN
RF_SCK
RF_SDA
LDON
MIRR
LEI
FEI
TEI
SBAD
RFO
MVREF
RF_AMP
PCMSD0
PCMSD0
PCMCLK
PCMWS
ACLK
ADAC_SCK
ADAC_SDA
ADAC_CS0
ADAC_SCK
ADAC_SDA
ADAC_CS0
FOCUS+
FOCUS-
HOMESW
SSPDON
SSLED
SFOCUS
STRACK
SMOTOR
HOMESW
SSPDON
SSLEG
SFOCUS
STRACK
SMOTOR
HOMESW
SSPDON
SSLED
SFOCUS
STRACK
SMOTOR
MUTEA
MUTEA
AV_Switcher
AOR
AOL
AOR
AOL
AOR-1
AOL-1
AOR-1(TV)
AOL-1(TV)
AOR-2
AOL-2
AOR-2(PHONE)
AOL-2(PHONE)
PSCAN
SPDIF+
AUDIO.SCH
PSCAN
SPDIF+
Y/G/CVBS1
Cb/B/Y
Cr/R/C
FLASH_RY
/FLASH_WP
MA[0..11]
BS1
BS0
/SCS
/RAS
/CAS
/WE
SDCLK
DQM
MD[0..15]
/WR
/RD
MOTOR
ADAC_SCK
ADAC_SDA
ADAC_CS0
MUTEA
RESET
SA[0..19]
SD[0..7]
/PSEN
/FWR
MVREF
PCMCLK
PCMWS
ACLK
RESET
LED
IR_IRQ
VFD_CS
VFD_SCK
VFD_SDA
I2C_SCK
I2C_SDA
BACK_LIGHT
MOTOR
PCMSD0
PCMCLK
PCMWS
ACLK
PSCAN
SPDIF+
CVBS/Y
Y
C
AV-SW
TRACK+
TRACK-
A/V OUTPUT
Audio DAC
RF_SDEN
RF_SCK
RF_SDA
LED
IR_IRQ
VFD_CS
VFD_SCK
VFD_SDA
I2C_SCK
I2C_SDA
BACK_LIGHT
LED
IR_IRQ
VFD_CS
VFD_SCK
VFD_SDA
I2C_SCK
I2C_SDA
BACK_LIGHT
MA[0..11]
BS1
BS0
/SCS
/RAS
/CAS
/WE
SDCLK
DQM
MD[0..15]
Y
A/V INPUT
CVBS
C
R
Speaker_R
L
AV-SW
Speaker_L
FLASH_RY
/FLASH_WP
/WR
/RD
<Value>
<Value>
MA[0..11]
BS1
BS0
/SCS
/RAS
/CAS
/WE
SDCLK
DQM
MD[0..15]
/WR
/RD
AV_OUT
PANEL
<Value>
SA[0..19]
SD[0..7]
/PSEN
/FWR
FLASH_RY
/FLASH_WP
Y/G/CVBS1
Cb/B/Y
Cr/R/C
AV-SW
SDRAM & ROM
SA[0..19]
SD[0..7]
/PSEN
/FWR
CVBS/Y
Y
C
POWER
+12V
+5V
+3.3V
+1.8V
/RESET
/RESET
/uPRST
/uPRST
CT908
-4-
+5V
+3.3V
+1.8V
/RESET
SRVM
Memory
+12V
MVREF
POWER
/uPRST
/uPRST
3 Power
3.1 Power Supply
Input voltage:
Normal voltage: 100 to 240 Vac.
Variation range: 90 to 264 Vac.
Input frequency:
Normal frequency: 50 to 60 Hz.
Variation range: 47 to 63 Hz.
Input current: 0.6 arms max. at any input voltage and max. DC output rated load.
Inrush current: 70 amps max. cold start at 240 Vaz. Input, with rated load and 25 ambient.
AC leakage current: 0.25 mA max. at 240 Vac. Input.
3.2 Rechargeable Battery
Output Voltage8.4~6.0V
Cut-off Voltage5.7~6.0V
Charge voltageThe battery pack should be charged when the input voltage is from11V to 15V
Chargera.) Mustek 12V/1.25A adaptor.
b.) Mustek 12V/1.25A adaptor and Portable DVD
LED is in red color when the battery pack is in charging; and turns into green color when
batter pack is full.
If the battery pack is in Full status, no matter use adaptor charge directly or link DVD to
charge again, the LED must be turn into green color in 15 min.
The cycle life of battery pack has more than 300 cycles.
Charge: The battery pack must be able to charge when used the Mustek 12V/1.25A adaptor or
Mustek 12V/1.25A adaptor and portable DVD (power off status).
Discharge: Using the battery pack as the power source for portable DVD that in DVD disc
playing mode, the discharging time must be exceed 2.7hrs.
4.2.1 Electrical Protection
The battery pack shall be capable of withstanding a continuous short circuit output
-5-
without damage.
The battery pack shall return to normal operation only after the fault has been removed.
A thermal fuse must be added on the surface of cell body to protect the battery pack.
A polyswitch must be add to protect the battery pack.
Charge & Play Time of Battery Pack
NiMH 3800mAh
(6S1P)
Charge Time
DVD Title
(hr)
Play Time (hr)
3.5
2.5
Styling
For PL400, PL400H Series
<Option>
Li-ion 4000mAh
(2S2P)
3.7
3.0
For all models
Li-ion 6600mAh
(2S3P)
6.0
5.0
For PL400, PL400H Series
-6-
4 Dimension & Physical Characteristics
4.1 Outline Dimension
212mm(L) x 158mm(W) x 29.8mm(H)
4.2 Physical Characteristics
-7-
4.3 IM Drawing
Disc Cover & Top bezel module
-8-
Mecha & Top bezel module
-9-
Base & engine module
- 10 -
Up-case & LCD panel module, full set structure
- 11 -
5 Regulatory Standards
5.1 Safety
ETL
TUV-GS
LVD
CB
5.2 EMI
CE
FCC
5.3 Ergonomics
Dolby
Macrovision
- 12 -
6 Trouble Shooting
6.1 Error Code Table
CODE
Descriptions of Error
Note
Power Test
T01
No power no action
T02
Power Led indicator is not on or insufficient brightness
T03
Loading time too long
T04
Remote control bad sensing or not functional
T05
System stays in the Run In condition after power on, can’t be tested
T06
System down at power on
T07
System down during playing
T08
Power on unstable
T09
Abnormal sound in the system
Disc Drive Test
T11
Can’t read the disc (No Disc)
T12
Disc drive no action or locked
T13
Disc drive scratches the disc
T14
Some discs can’t be played (can’t play CD or VCD or DVD)
T15
Head does not work
T16
Spindle does not work
Video Test
T21
No video / abnormal (Please indicate the abnormal condition)
T22
Video: no video / abnormal (Please indicate the abnormal condition)
T23
S-Video No video / abnormal or black & white (Please indicate the
abnormal condition)
T24
VCD picture abnormal (Please indicate the abnormal condition)
T25
DVD picture abnormal (Please indicate the abnormal condition)
T26
Picture subtitle display abnormal or no display
T27
Setting menu picture abnormal (Please indicate the abnormal condition)
Audio Test
T31
Audio / left sound channel (AOL) does not have waveform (sound) or
waveform (sound) abnormal
T32
Audio / right sound channel (AOR) does not have waveform (sound) or
waveform (sound) abnormal
- 13 -
T33
MP3 abnormal sound
T34
Audio no waveform (sound) or waveform (sound) abnormal
Earphone Test
T41
Earphone no sound or the sound has pause, abnormal sound, noise, echo
T42
Earphone (right) no sound or the sound has pause, abnormal sound, noise
T43
Earphone (left) no sound or the sound has pause, abnormal sound, noise
Function Key Test
T51
Video can’t be still or stop
T52
Can’t execute fast forward or rewind
T53
Panel button
System Setting Test
T61
Can’t enter the system setting
T62
The system can not be played or it is down after the system is set
TFT Test
T71
TFT image and color error
T72
TFT image is black and white
T73
TFT image shakes and is distorted
T74
TFT PAL color strip
T75
TFT ripple
6.2 Debug & Trouble Shooting
CBA for any missing components and bad soldering
T01No Power
Main Board
A. Check for components EC028E026EC025C019C020 on the Main Board
to see if there are any short circuits.
B.
Check for component J06 on the Main Board and J103 on the Power Board to
see if the pins are straight.
Power Board
A. Check the components on the Power Board for any burnt marks.
B. Check components EC105EC109EC113 on the Power Board to see if there
are any short circuits.
C. Check the components L103, L104 on the Power Board for any burnt marks.
D. If none of the above actions is effective, please change Power Boards.
T02Power LED indicator not on or insufficient brightness
Main Board
A. Open the cover of the portable DVD-player to inspect if LEDD901functions
normally.
- 14 -
B.
C.
Measure pin 168 on U201 to see if the voltage is high.
Measure R903 to see if the voltage is highand the negative end of D901 must
be low voltage.
D.
Disassemble F/W, replace with a good one or re-plug it to see if the LED lights
up when Power ON.
E. If the above actions are not working, replace the Main Board.
T03Loading time too long
Main Board
A.
Remove the cover to see if the resistors or resistor-array adjacent to U201 and
U701or IC, to see if there is any cold soldering, hollow soldering, misplaced
soldering, or wrong part.
B. If the above actions are not working, replace the Main Board.
T04Remote control bad sensing or sensing not functional
Remote control
A. If the main body of the system works normally, then making sure that the
battery of the Remote control has sufficient power, if it is not, replace the
battery.
Main Board
A. Remove the top cover and the panel. Check to see if U901 has short circuit,
broken circuit, hollow soldering, or other problems. Also check if the pins 1 of
U901 have power.
B. If the above actions are not working, replace the Main Board.
T05Stay in the Run In condition after power on, can’t be tested
Main Board
A. Remove the top cover and replace with another U301 F/W.
B. If the above actions are not working, replace the Main Board.
T06System down at power on
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
B. Disassemble U301 F/W, replace with a good one or re-plug it to see if the
symptom will disappear.
C. If the above actions are not working, replace the Main Board.
T07System down during play
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
B. Disassemble U301 F/W, replace with a good one or re-plug it to see if the
symptom will disappear.
- 15 -
C.
Check the resistors or capacitors of J601, U301, or U201 on the main board, or
those adjacent to IC to see if there is any hollow soldering, cold soldering,
wrong part, or misplaced soldering.
D.
If the above actions are not working, replace the Main Board.
DVD ROM
A.
Check the loader to see if it is not stable (any condition that some of the discs
can’t be played). If so, replace the loader.
DVD DISC
A.
Check the Test Disc to see if there is any serious scratch or ring shape, circular
shape scratches, if so, replace the Test Disc and test again.
T08Power on unstable
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
B. Disassemble U301F/W. Replace it with a good one or re-plug it to see if the
symptom will disappear.
C. If the above actions are not working, replace the Main Board.
T09Abnormal sound in the machine base (Power on abnormal sound)
DVD ROM
A. Check the loader to see if it is the source of the abnormal sound. If so, replace
the loader.
T11Disc drive can’t read (NO DISC)
Main Board
A. Check the resistors or resistor-array adjacent to U201 Pin200~208 and
Pin61~70 or IC to see if there is any hollow soldering or cold soldering.
B. Check the resistors or capacitors of J601, U601, U201, or U302, or those
adjacent to IC to see if there is any hollow soldering, cold soldering, wrong part,
or misplaced soldering.
C. Check to see whether J902 is damaged.
D. If the above actions are not working, replace the Main Board. If it is still not
working, replace the loader.
DVD ROM
A. Check the loader to see if it can’t read. If so, replace the loader.
T12Disc drive no action or locked
Main Board
A. Remove the cover. Check to see if it is caused by mis-assembly.
B. Check the resistors or capacitors of J801, U801, or U802 on the main board, or
those adjacent to IC to see if there is any hollow soldering or cold soldering.
C. If the above actions are not working, replace the loader. If it is still not working,
- 16 -
replace the main board.
T13Disc drive scratches disc
Main Board
A.
Check the resistors or capacitors of J601 or U601 on the main board, or those
adjacent to IC to see if there is any hollow soldering, cold soldering, wrong part,
B.
or misplaced soldering.
If the above actions are not working, replace the loader. If it is still not working,
replace the main board.
DVD ROM
A.
Check the loader to see if it is the cause of disc scratching. If so, replace the
loader.
T14Not every disc can be played
Main Board
A. Check the resistors or capacitors of J601 or U601 on the main board, or those
adjacent to IC to see if there is any hollow soldering, cold soldering, wrong part,
or misplaced soldering.
B. If the above actions are not working, replace the loader. If it is still not working,
replace the main board.
T15Head does not work
Main Board
A. Remove the top cover, check the 30-pin flat cable in the system to see if they
are correctly plugged to the fixed positions, or re-plug them.
B. Check the resistors or capacitors of J601 or U601 on the main board, or those
adjacent to IC to see if there is any hollow soldering, cold soldering, wrong part,
or misplaced soldering.
C. If the above actions are not working, replace the loader. If it is still not working,
replace the main board.
T16Spindle does not work.
Main Board
A. Remove the top cover, check the 18-pin flat cable in the system to see if they
are correctly plugged to the fixed positions, or re-plug them.
B. Check the resistors or capacitors of J801 or U802 on the main board, or those
adjacent to IC to see if there is any hollow soldering, cold soldering, wrong part,
or misplaced soldering.
C. If the above actions are not working, replace the loader. If it is still not working,
replace the main board.
T21no video / abnormal
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
- 17 -
B.
correctly plugged to the fixed positions, or re-plug them.
Check the resistors or resistor-array adjacent to U201 Pin9497100 on the
main board or IC to see if there is any short circuit, hollow soldering or cold
soldering. Rule out the problem if there is any.
C.
Use oscilloscope to measure if YM201 generates 27MHz. If it does not generate
said frequency, and the problems such as cold or hollow soldering have been
ruled out, it could be YM201 NG. Replace YM201.
D.
Check U201 to see if it has bad contact or if U301(F/W) IC has any problem.
E.
Check if the 3pin connector (J03) on the Main Board is well soldered.
F. Check if switch J507 is normal; replace a new one if necessary.
G. If the above actions are not working, replace the Main Board.
Driver Board
A. Adjust L201 to the appropriate frequency.
B. Check if the component on D101 is using the correct component. Also check if
it’s damaged.
DVD ROM (less likely to happen)
A. If it is useless to change the main board, then replace the loader.
T22Video no video / abnormal
Main Board
A. Remove the cover. Check J505 on the main board to see if there is any cold or
hollow soldering and rule out the problem.
B. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
C. Check RLC following CVBS to see if there is any wrong parts, cold and hollow
soldering, short circuit, broken circuit, broken parts and rule out the problem.
D. If the above actions do not work, then check U201Pin100 and Pin102-104 to
see if there is any cold or hollow soldering and short circuit problem and rule
out the problem.
E. Check if the 3pin connector (J03) on the Main Board is well soldered.
F. If the above actions are not working, replace the Main Board.
T23S-Video no video / abnormal or black & white
Main Board
A. Remove the cover. Check J504 on the main board to see if there is any cold or
hollow soldering and rule out the problem.
B. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
C. Check RLC following Y and C to see if there is any wrong parts, cold and
hollow soldering, short circuit, broken circuit, broken parts and rule out the
problem.
- 18 -
D.
If the above actions do not work, then check U201Pin94, Pin97, and
Pin102-104 to see if there is any cold or hollow soldering and short circuit
problem and rule out the problem.
E.
Check if the 3pin connector (J03) on the Main Board is well soldered.
F. If the above actions are not working, replace the Main Board.
T24VCD abnormal picture
Main Board
A.
Check U201 and U302 to see if there is any cold or hollow soldering and short
circuit problem and rule out the problem.
B.
Check the resistors or capacitors of J601, U601 or those adjacent to IC to see if
there is any hollow soldering, cold soldering, wrong part, or misplaced
soldering.
C. If the above actions are not working, replace the Main Board.
DVD ROM
A. If the abnormal picture is the problem of pause or skipping tracks, then making
sure if the disc has any scratches or dirt, if no such problems then replace the
loader.
T25DVD abnormal picture
Main Board
A. Check U201 and U302 to see if there is any cold or hollow soldering and short
circuit problem and rule out the problem.
B. Check the resistors or capacitors of J601, U601 or those adjacent to IC to see if
there is any hollow soldering, cold soldering, wrong part, or misplaced
soldering.
C. If the above actions are not working, replace the Main Board.
DVD ROM
A. If the abnormal picture is the problem of pause or skipping tracks, then making
sure if the disc has any scratches or dirt, if no such problems then replace the
loader.
T26Picture subtitle abnormal display or no display
Main Board
A. Remove the top cover and dis-assemble F/W (U301). Replace it with a good
F/W or re-plug it, then check if the action is normal. Otherwise replace the F/W.
B. Check U201 and U302 to see if there is any cold or hollow soldering and short
circuit problem and rule out the problem.
C. If the above actions are not working, replace the Main Board.
T27Setting menu abnormal picture
Main Board
A. Check U201 to see if there is any cold or hollow soldering and rule out the
- 19 -
problem.
B. If the above actions are not working, replace the Main Board.
T31Audio /left channel (AOL) no sound or abnormal sound
Main Board
A. Remove the cover. Check J501J502 on the I/O board to see if there is any cold
B.
soldering, hollow soldering, or damage. Rule out the problem.
Check all parts following AOL to see if there is any cold or hollow soldering,
short circuit, broken circuit, parts missing, wrong parts and rule out the
problem.
C. If the above actions are not working, replace the Main Board.
T32Audio /right channel (AOR) no sound or abnormal sound
Main Board
A. Remove the cover. Check J501J502 on the I/O board to see if there is any cold
soldering, hollow soldering, or damage. Rule out the problem.
B. Check all parts following AOR to see if there is any cold or hollow soldering,
short circuit, broken circuit, parts missing, wrong parts and rule out the
problem.
C. If the above actions are not working, replace the Main Board.
T33MP3 abnormal sound
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
B. Check if Pin4 and Pin8 on U402 connected to -12V.
C. Check the resistors or capacitors of J501and J502 on the main board, or those
adjacent to IC to see if there is any hollow soldering or cold soldering.
D. If the above actions are not working, replace the main board. If it is still not
working, replace the loader.
T34Audio no waveform (sound) or waveform (sound) abnormal
Main Board
A. Remove the cover. Check J501J502J506 on the main board to see if there is
any cold or hollow soldering and rule out the problem.
B. Check all parts following AOL and AOR to see if there is any cold or hollow
soldering, short circuit, broken circuit, parts missing, or wrong parts. Rule out
the problem.
C. If the above actions are not working, replace the Main Board.
T41Earphone Audio no waveform (sound) or waveform (sound) abnormal
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
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B.
Check U401U402U403 and J501J502 to see if there is any cold or hollow
soldering and rule out the problem.
C. If the above action does not work after the inspection, replace the main board.
T42Earphone Audio right no waveform (sound) or waveform (sound ) abnormal
Main Board
A. Check U401U402U403 and J501J502 to see if there is any cold or hollow
soldering and rule out the problem.
B. If the above action does not work after the inspection, replace the main board.
T43Earphone Audio left no waveform (sound) or waveform (sound) abnormal
Main Board
A. Check U401U402U403 and J501J502 to see if there is any cold or hollow
soldering and rule out the problem.
B. If the above action does not work after the inspection, replace the main board.
T51Video can’t be still or stopped
Remote control
A. If the main body of the system works normally, then making sure that the
battery of the Remote control has sufficient power, if it is not, replace the
battery.
Main Board
A. Check to see if U201 and U903 is damaged, and check all parts following U201
and U903 to see if there is any cold or hollow soldering, short circuit, broken
circuit, broken parts, parts missing and rule out the problem.
B. Check to see whether U901 is damaged.
C. If the above actions are not working, replace the Main Board.
T52Can’t execute fast forward or rewind
Main Board
A. Check to see if U201 and U903 is damaged, and check all parts following U201
and U903 to see if there is any cold or hollow soldering, short circuit, broken
circuit, broken parts, parts missing and rule out the problem.
B. Check to see whether U301 is damaged.
C. If the above actions do not work after the inspection, it means the main board or
F/W is bad. Replace the main board or re-burn the F/W (U301).
T53Panel button
Main Board
A. Check to see if U201 and U903 is damaged, and check all parts following U201
and U903 to see if there is any cold or hollow soldering, short circuit, broken
circuit, broken parts, parts missing and rule out the problem.
B. If the above actions are not working, replace the Main Board.
T61Can’t enter the system setting
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Main Board
A. Check U201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
B.
If the above actions do not work after the inspection, it means the main board or
F/W is bad.
C. Replace the main board or re-burn the F/W (U301).
T62System can’t play or system down after setting
Main Board
A.
Check U201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
B. If the above actions do not work after the inspection, it means the main board or
F/W is bad. Replace the main board or re-burn the F/W (U301).
T71TFT image and color error
Main Board
A. Check the 12-pin cable connected to the driver board to see if there is any
problem of plugging. Rule out the problem.
B. Check devices after Y/C signal to see if there is any cold or hollow soldering
and reverse soldering of IC or parts missing.
C. Check U201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
D. If the above actions are not working, replace the Main Board.
Driver Board
A. Measure the voltages of PIC, GM2, GM0, RGB, SBR, SBB, TIN and CNT to
see if they are correct.
B. Check VR311 to see if there is any cold or hollow soldering and reverse
soldering of IC or parts missing.
C. Check L201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
D. If the above actions are not working, replace the Driver Board.
T72TFT image is black and white
Main Board
A. Check the 12-pin cable connected to the driver board to see if there is any
problem of plugging. Rule out the problem.
B. Check devices after Y/C signal to see if there is any cold or hollow soldering
and reverse soldering of IC or parts missing.
C. Check U201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
D. If the above actions are not working, replace the Main Board.
Driver Board
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A.
Measure the voltages of PIC, GM2, GM0, RGB, SBR, SBB, TIN and CNT to
see if they are correct.
B.
Check VR311 to see if there is any cold or hollow soldering and reverse
soldering of IC or parts missing.
C.
Check the devices surrounding X301 and X302 to see if there is any cold or
D.
hollow soldering and reverse soldering of IC or parts missing.
Check L201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
E. If the above actions are not working, replace the Driver Board.
T73TFT image shakes or is distorted
Main Board
A. Check the 12-pin cable connected to the driver board to see if there is any
problem of plugging. Rule out the problem.
B. Check devices after Y/C signal to see if there is any cold or hollow soldering
and reverse soldering of IC or parts missing.
C. Check U201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
D. If the above actions are not working, replace the Main Board.
Driver Board
A. Measure the voltages of PIC, GM2, GM0, RGB, SBR, SBB, TIN and CNT to
see if they are correct.
B. Check VR311 to see if there is any cold or hollow soldering and reverse
soldering of IC or parts missing.
C. Check the devices surrounding X301 and X302 to see if there is any cold or
hollow soldering and reverse soldering of IC or parts missing.
D. Check L201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
E. If the above actions are not working, replace the Driver Board.
T74TFT PAL color strip
Driver Board
A. Measure the voltages of PIC, GM2, GM0, RGB, SBR, SBB, TIN and CNT to
see if they are correct.
B. Check VR311 to see if there is any cold or hollow soldering and reverse
soldering of IC or parts missing.
C. Check the devices surrounding X301 and X302 to see if there is any cold or
hollow soldering and reverse soldering of IC or parts missing.
D. Check L201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
E. Check the devices surrounding VC301 to see if there is any cold or hollow
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F.
soldering and reverse soldering of IC or parts missing.
Check Pin 1 to Pin 16 on U301 for any cold or hollow soldering and reverse
soldering of IC or parts missing.
G. If the above actions are not working, replace the Driver Board.
T75TFT ripple
Main Board
A. Check the 5-pin and 12-pin cables connected to the driver board to see if there
is any problem of plugging. Rule out the problem.
B.
Check the 3-pin cable connected to the inverter board to see if there is any
problem of plugging. Rule out the problem.
C. If the above actions are not working, replace the Main Board.
Driver Board
A. Measure the voltage U101 to see if it is correct.
B. Check J101, J201, and J301 to see if there is any cold or hollow soldering and
reverse soldering of IC or parts missing.
C. Check the devices surrounding VR311 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
D. Check the devices surrounding X301 and X302 to see if there is any cold or
hollow soldering and reverse soldering of IC or parts missing.
E. Check L201 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing. If so, adjust L201.
F. If the above actions are not working, replace the Driver Board.
Power Board
A. Check U104, U102 (or U105) for any hollow or cold soldering and reverse
soldering of IC or missing parts.
Inverter Board
A. Check the 3-pin cable connected to the inverter board to see if there is any
problem of plugging. Rule out the problem.
B. Check the sharing cable connected to the panel to see if there is any problem of
plugging. Rule out the problem.
C. Check the high-voltage cable connected to the panel to see if there is any
problem of plugging. Rule out the problem.
D. If the above actions are not working, replace the inverter board.
Panel
A. Check the sharing cable connected to the inverter board to see if there is any
problem of plugging. Rule out the problem.
B. Check the high-voltage cable connected to the panel to see if there is any
problem of plugging. Rule out the problem.
C. If the above actions are not working, replace the panel.
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