S/ M No. : OSPC790001
Ser v ice M a nua l
Portable DVD Player
Model: DPC-7900 Series
C aution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list.
May. 2005
8Revision Record9
Description
Date
Rev No
0.1
Section
17/ Dec./ 2005
New edition
¢
¢
Design and specifications are subject to change without notice.
All trademarks used in the specifications are the property of their respective owners.
1. General Descriptions …………………………………………………
1
1.1. Model Features
1
…………………………………………………………
1.2. Information
…………………………………………………………………
2
……………………………………………
2. Electrical Characteristics
2.1. Optical Characteristics
3
3
……………………………………………………
2.2. Electrical Characteristics
……………………………………………… 3
2.3. System Block Diagram
2.4. Schematic Circuit Diagram
4
5
……………………………………………………
…………………………………………
3. Power………………………………………………………………………
11
11
3.1. Power Supply
………………………………………………………………
3.2. Rechargeable Batte.
ry
………………………………………………………
11
4. Dimension & Physical Characteristics …………………………
13
13
4.1. Outline Dimension
…………………………………………………
4.2. Physical Characteristics
…………………………………………………
13
14
4.3. Exploded View
………………………………………………………………
5. Regulatory Standards
……………………………………………
19
5.1. Safety
5.2. EMI
19
………………………………………………………………………
19
………………………………………………………………………………
5.3. Ergonomics
………………………………………………………………… 19
…………………………………
6. Service Tools and Equipment
6.1. Service Tools and Equipmen.t
20
………………………………………
20
20
6.2. Storing and HandlingTest Discs
……………………………………
6.3. Notes
………………………………………………………………………
21
7. Spare Parts …………………………………………………………
23
23
7.1. key Parts List
……………………………………………………………
8. Trouble shooting ………………………………………………………
24
8.1. Error Code Table
……………………………………………………
24
25
8.2. Debug & Trouble Shooting
……………………………………………
1 General Descriptions
1.1 Model Features
ò
Video: DVD Playback, MPEG4(option) ,DivX(DivX Model),Kodak Picture CD compatible
& JPEG readable
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
ò
Audio: CD, CD-R, CD-RW, MP3, WMA Playback
Firmware Upgradable
Dolby Digital Output
7" active-matrix TFT screen, 16:9 wide aspect ratio
Composite Video Output
Ultra dimension & light weight: 205mm(L) x 163.5mm(W) x 38mm(H) / 900g (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
Parental Lock
Anti Shock Protection
- 1 -
1.2 Information
Disk Format
DVD, VCD, CD, MP3, CD-R, CD-RW, MPEG4 (OPTION),JPEG,
Kodak Picture CD, DivX(DivX Model),WMA
NTSC / PAL/Auto
Video System
Video Decompression
Video Output
MPEG-2 (ISO/IEC-13818), MPEG-1
800~1200mVpp/75 ohm
Audio Characteristic
Analog Output
2-Channel Analog
1.0~2.0Vrms/10K ohm
Frequency Response
DVD: 48kHz Sampling: 20Hz-20kHz
CD: 20Hz-20kHz
S/N Ratio
<= -65dB
Dynamic Range
<= -85dB
Audio Output Noise &Distortion Less than<= 0.01%
Digital Output
SPDIF
Headphone Jack
LCD Display
32ohm (30Mw) > 8ohm
7” active-matrix TFT type
Audio input/output x1
Video input/output x1
S-Video / Coaxial output x1
Audio / Video Section
Audio Section
Headphone Jack
Line Voltage
Power Consumption
Remote Control
Dimensions
Digital Output: Coaxial x1
Headphone Jack x1
AC 100~240 VAC ± 10%(50/60Hz), (Adapter)
12W (DC 12V, 1.0A)
DC 3V Infra-red
205mm(L) x 163.5mm(W) x 38mm(H)
900 g (around)
Weight
Accessories
Slim Size Remote Controller with 3V Battery
12-volt Car Cigarette Lighter Cable
Universal AC/DC Power Adapter
Audio Cable / Video Cable
Ni-MH Rechargeable Battery Pack
S-video / Coaxial cable
- 2 -
2 Electrical Characteristics
2.1 Optical Characteristics
Parameter
Specifications
7.0 (16:9 diagonal)
J
Unit
inch
dot
Screen Size
Display Format
Active Area
1400 (H)
234 (V)
86.08 (V)
0.370 (V)
J
154.08 (H)
0.107 (H)
mm
mm
J
Dot Pitch
Pixel Configuration
Outline Dimension
Surface Treatment
Weight
Stripe
ꢀ
ꢀ
166.0 (W)
100.0 (H)
7.2 (D)(typ.)
mm
g
Anti-Glare and Hard Coating
180 ± 10
2.2 Electrical Characteristics
ò
DVD/ SVCD/ VCD/ CD system decoding, packeted element streams and audio, video element
streams.
ò
ò
ò
ò
ò
ò
ò
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
Programmable Y/C delay relationship
Embedded micro-controller, up to 50MHz operating frequency
1.8V and 3.3V dual power supply, 208 pin PQFP
- 3 -
2.3 System Block Diagram
2.3.1. The System Block Diagram & the Block's Function Description
INVERTER
DISPLAY
7” TFT LCD
PW070XU3
DC To DC
MP1580
TFT LCD Driver
IR3Y29B +HX8806
1.
Loader
DM-520A
2. Servo +MPEG
MT1389D/MT1389C
- 4 -
2.4 Schematic Circuit Diagram
( 1 ) P O W E R _ M P S
2
3
2
3
3
1
2
1
2
- 5 -
(2) POWER FOR TFT
2
3
4
8
4
8
3
6
GND
GND
5
6
7
8
GND
GND
GND
GND
1
6
GND
VDD
8
8
1
3
1
3
2
3
7
5
7
5
6
6
- 6 -
(3) SERVO&MPEG
TOP
6
5
4
3
2
1
2
3
3
2
RFVDD3
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
216
215
214
213
212
211
210
209
208
207
206
205
204
203
202
201
200
199
198
197
196
195
194
193
192
191
190
189
188
187
186
185
184
183
182
181
180
179
178
177
176
175
174
173
172
171
170
169
168
167
166
165
164
163
IOA18
DVSS
IOA19
DVDD3
IOWR#
A16
AVDD3
IREF
RFGC
OSN
OSP
RFGND
CRTPLP
HRFZC
RFRPAC
RFRPDC
RFVDD3
ADCVSS
ADCVDD3
LPFOP
LPFIN
R175
C87
15k
0.1uF
C89
0.1uF
PWR#
A16
C90
C94
0.033uF
0.1uF
RFVDD3
DVDD3
A15
A14
A13
A12
A11
A10
A9
R170
1000pF
100k V1P4
20pF
C77
HIGHA7
HIGHA6
HIGHA5
HIGHA4
HIGHA3
HIGHA2
HIGHA1
IOA20
IOCS#
DVSS
IOA1
IOOE#
DVSS
AD0
AD1
AD2
AD3
AD4
AD5
AD6
IOA21
ALE
DVDD18
AD7
A17
DVDD3
IOA0
UWR#
URD#
UP1_2
UP1_3
GPIO6
UP1_4
UP1_5
UP1_6
DVSS
UP1_7
UP3_0
UP3_1
UP3_4
UP3_5
GPIO7
ICE
C84
C78
0.1uF
RFVDD3
C91
0.047uF
0.047uF
A20
PCE#
C92
LPFIP
LPFON
PLLVDD3
IDACEXLP
PLLVSS
JITFN
A1
PRD#
PLLVDD3
C82
0.47uF/N.C
AD0
AD1
AD2
AD3
AD4
AD5
AD6
A21
ALE
JITFN
JITFO
JITFO
XTALI
XTALI
R178
R179
0
0
XI
XO
XTALO
RFVDD18
RFGND18
ADACGND
AL
RFV18
AL
VCM
AR
AR
ADACVDD3
AD7
A17
ADACVDD3
APLLVSS
APLLCAP
APLLVDD3
R
1
2
A0
APLLVDD3
Y6
Y5
UWR#
URD#
RGB_SWITCH
B
DACVSSA
G
DACVDDA
DACVSSB
DACVDDB
CVBS
DACVSSC
FS
VREF
VSCK
Y4
DACVDD3
VSTB
VSDA
SCL
DACVDD3
Y3
SDA
RESET#
MUTE_DAC
RXD
TXD
TRCLOSE
ICE
URST#
IR
DACVDD3
ASPDIF
DACVDDC
SPDIF
MC_DATA
DVDD3
ASDATA3
ASDATA2
ASDATA1
ASDATA0
ALRCK
FS0
ASDAT2
ASDAT1
ASDAT0
ALRCK
PRST#
IR
INT0#
DVDD3
INT0#
7
14
7
14
3
2
1
- 7 -
(4) SDRAM&FLASH&EEPROM
- 8 -
(5) VIDEO OUTPUT
2
3
2
3
- 9 -
(6) AUDIO OUTPUT
2
3
2
3
2
3
+
+
5
6
7
4
3
2
5
6
7
4
3
2
8
1
-
+
2
3
8
1
-
+
7
6
5
2
3
4
7
6
5
2
3
4
8
4
8
4
+
+
+
+
3
2
2
3
1
2
1
3
2
+
+
680pF
P H O N E _ O N
680pF
680pF
680pF
- 10 -
3 Power
3.1 Power Supply
ò
Input voltage:
Normal voltage: 100 to 240 Vac.
Variation range: 90 to 264 Vac.
Input frequency:
ò
Normal frequency: 50 to 60 Hz.
Variation range: 47 to 63 Hz.
ò
ò
ò
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 25R ambient.
AC leakage current: 0.25 mA max. at 240 Vac. Input.
3.2 Rechargeable Battery
ò
ò
ò
ò
Output Voltageꢀ8.4~6.0V
Cut-off Voltageꢀ5.7~6.0V
Charge voltageꢀThe battery pack should be charged when the input voltage is from11V to 15V
Chargerꢀa.) Hiteker DC12V/2.0A adaptor.
b.) Hiteker DC12V/2.0A adaptor and Portable DVD
ò
ò
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.
ò
ò
Charge: The battery pack must be able to charge when used the Hiteker DC12V/2.0A adaptor or
Hiteker DC12V/2.0A 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 2.5hrs.
ò
3.2.1 Electrical Protection
ò
The battery pack shall be capable of withstanding a continuous short circuit output without damage.
- 11 -
ò
ò
ò
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.
ò
Charge & Play Time of Battery Pack
Charge Time
(hr)
DVD Title
Play Time (hr)
Styling
Ni-MH 2400mAh
(6S1P)
4~5
2.5
For DPC-7900 Series
- 12 -
4 Dimension & Physical Characteristics
4.1 Outline Dimension
ò
205mm(L) x 163.5mm(W) x 38mm(H)
4.2 Physical Characteristics
1
15
15
2
3
4
5
6
7
8
9
10
11
12
13
14
1.LCD SCREEN
2.TFT ON/OFF KNOB
4.PREV
3.DISC MENU
5.TV MODE
7.SUB TITLE
9.PAUSE
6.NEXT
8.PLAY
10.STOP
12.DIRECTION BUTTONS/FR,FF
14.OPEN/PUSH
11.ENTER
13.SETUP
15.SPEAKERS
- 13 -
4.3 Exploded View
4.3.1 DVD Door & Mainbody_top module
- 14 -
4.3 Exploded View
4.3.2 Keyboard & Mainbody_top module
- 15 -
4.3 Exploded View
4.3.3 Mecha & Mainbody_bottom module
- 16 -
4.3 Exploded View
4.3.4 Mainbody module
- 17-
4.3 Exploded View
4.3.5 Display module & Mainbody module
- 18 -
5 Regulatory Standards
5.1 Safety
ò
ò
ò
UL
FDA
LVD
5.2 EMI
ò
ò
CE
FCC
5.3 Ergonomics
ò
Dolby
- 19 -
6 Service Tools and Equipment
6.1Service Tools and Equipment Table
Application
Name
General
Confirm
Adjust
DVD Testing Disc
General Tools screwdriver etc.
CD Testing Disc
VCD Testing Disc
Oscillograph
Probes
AV Cables
TV Monitor
Searing-iron
Grounding for electrostatic breakdown
Antistatic wrist strap
Conductive material steel sheet
6.2 Storing and Handling Test Discs
It is important for a DVD testing disc keeping its surface precise. Please
care for storing and using it.
1. Do not place the disc on worktable directly after using.
2. Do not store discs in places subject to direct sunlight or near heat sources.
- 20 -
3. Do not place the disc on a glass surface. It may damage the disc. If this happened,
please use a new testing disc adjust DVD player precision.
6.3 Notes
PLEASE READ ALL NOTES GIVEN IN THIS MANUAL.
■ Locate
● Place the unit on a firm, flat surface.
● Do not place in a high temperature (upwards of 40 ) or high wet
(upwards of 80 percent) area.
● Do not place in an area with a lot of dust.
● Keep away from direct sunlight &domestic heating equipment.
■ Do not fall any objects into the unit.
● Care should be taken so that liquids are not spilled into the unit openings.
Such situations could result in fire or electrical shock.
● Keep the DVD video player away from any magnetic articles such as speaker etc.
■ Superposition
● Please place the DVD player horizontally. Do not place a heavy object
(amplifier, receiver) on it. The object may fall, causing serious personal injury
- 21 -
or death.
● This unit should be situated away from heat source, such as amplifiers, radiators,
stoves or any other units producing heat.
■ Condensation
Lens could be moistening in these cases.
● Turn on heater shortly,
● In a very wet room,
● Move the player from a cold environment to a heat environment quickly.
Being moisture inside the play could operate normally. Please turn on power and
wait about an hour for drying the moisture.
- 22-
7 Spare Parts
7.1 Key Parts List
Location
Part NO
Part Name
Description
Maker
Remark
GKB2.855.8105MX
GKB2.855.8138MX
MT1389QE_D
ICMT1389DE-C
AT49LV4096AT-70TC
ICMX26LV800BTC-70
IC42S16100-7T
IS42S16400-7T
ICBA5954FP
ICBA5954FP
IC24C02
MEPG Board
MEPG Board(With DivX)
MTK1389D
MTK1389C
4M Memory
8M Memory
SDRAM IC
Hiteker
Hiteker
MTK
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
W/O DivX
With DivX
Main Board
U17
U11
U11
U14
U7
MPEG IC
MTK
ATMEL
FUJITSU
ISSI
FLASH Memory
IC
SDRAM IC
U13
U38
U12
U12
U15
UM1/2
U1/2
U19
U20
SDRAM IC
ISSI
DRIVE IC
ROHM
ROHM
ATMEL
ATMEL
MPS
MOTOR DRIVE
IC
DRIVE IC
EEPROM IC
EEPROM IC
DC TO DC
EEPROM IC
Power Trans IC
AUDIO Trans IC
IC24C02
MP1580
MP1580
DC TO DC
MPS
TPA6011
AUDIO Amplifier
AUDIO Amplifier
TI
TPA6011
TI
GKB4.021.8027MX
GKB2.930.8026MX
Function Key Part
Hiteker
For All
For All
Key PCB
High Voltage PCB TOP-STAR
High Voltage PCB
GKB2.855.8042MX
HX8806
TFT LCD Driver
TCON IC
Hiteker
HIMAX
SHARP
For All
For All
For All
Drive PCB
TCON IC
U201
U1
IR3Y29B
VIDEO Decode IC
VIDEO Decode IC
DM-520A
HOP-1200W
DVD Player
Pick up
Foryou
HITACH
Moretech
WeiZhen
For All
For All
For All
For All
Loader
Pick up
CCM03-030R1-49
WFF-030PB-08315
Spindle Motor
Sled Motor
Spindle Motor
Sled Motor
PW070XU3
GKB4.819.8045MX
GKB2.930.8015
GKB2.018.8072WX
PVI
Rebenergy
SiDa
For All
For All
For All
For All
TFT Screen
Rechargeable Battery
AC/DC Adapter
Remote Control
TFT screen
Ni-MH2400mAh
DC 12V 2.7A
Remote Control
FeiDa
- 23 -
8 Trouble Shooting
8.1 Error Code Table
CODE Descriptions of Error
Power Test
Note
T01
T02
T03
T04
T05
T06
T07
T08
T09
No power no action
Power Led indicator is not on or insufficient brightness
Loading time too long
Remote control bad sensing or not functional
System stays in the Run In condition after power on, can’t be tested
System down at power on
System down during playing
Power on unstable
Abnormal sound in the system
Disc Drive Test
T11
T12
T13
T14
T15
T16
Can’t read the disc (No Disc)
Disc drive no action or locked
Disc drive scratches the disc
Some discs can’t be played (can’t play CD or VCD or DVD)
Head does not work
Spindle does not work
Video Test
T21
T22
T23
No video / abnormal (Please indicate the abnormal condition)
Video: no video / abnormal (Please indicate the abnormal condition)
S-Video No video / abnormal or black & white (Please indicate the
abnormal condition)
T24
T25
T26
T27
VCD picture abnormal (Please indicate the abnormal condition)
DVD picture abnormal (Please indicate the abnormal condition)
Picture subtitle display abnormal or no display
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
- 24 -
T33
T34
MP3 abnormal sound
Audio no waveform (sound) or waveform (sound) abnormal
Earphone Test
T41
T42
T43
Earphone no sound or the sound has pause, abnormal sound, noise, echo
Earphone (right) no sound or the sound has pause, abnormal sound, noise
Earphone (left) no sound or the sound has pause, abnormal sound, noise
Function Key Test
T51
T52
T53
Video can’t be still or stop
Can’t execute fast forward or rewind
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
TFT image is black and white
TFT image shakes and is distorted
TFT PAL color strip
T72
T73
T74
T75
TFT ripple
6.2 Debug & Trouble Shooting
ò
ò
'C<8J<[:?<:B[K?<['CB for any missing components and bad soldering
T01ꢀNo Power
V
Main Board
A. Check for components on the Main Board to see if there are any short circuits.
B. Check for the power adapter to see if the 12V power is abnormal.
C. Check for components C6,C7,CE100,C3 on the Main Board to see if there are
any short circuits.
D. Check for component CN1 on the Main Board to see if the switch have function.
E. If none of the above actions is effective, please change Main Board.
ò
T02ꢀPower LED indicator not on or insufficient brightness
V
Main Board
A. Open the cover of the portable DVD-player to inspect if LED functions normally.
B. Measure the base electrode of Q1 to see if the voltage is high_and the emitter of
Q1 must be high voltage. Q1 is a NPN 3904 type transistor. If it is abnormal ,
- 25-
Please replace with a good one.
C. Disassemble F/W, replace with a good one or re-plug it to see if the LED lights
up when Power ON.
D. If the above actions are not working, replace the Main Board.
ò
T03ꢀLoading time too long
V
Main Board
A. Check the flat cable to see if it is adhibited to the right place.
B. Remove the cover to see if the resistors or resistor-array adjacent to U38 and or
U17, to see if there is any cold soldering, hollow soldering, misplaced soldering,
or wrong part.
C. If the above actions are not working, replace the Main Board.
ò
T04ꢀRemote control bad sensing or not functional
V
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
V
A. Remove the top cover and the panel. Check to see if IR1 has short circuit,
broken circuit, hollow soldering, or other problems. Also check if the pins 1 of
IR1 have power.
B. If the above actions are not working, replace the Main Board.
ò
ò
T05ꢀStay in the Run In condition after power on, can’t be tested
V
Main Board
A. The same refer to T03.
B. If the above actions are not working, replace the Main Board.
T06ꢀSystem down at power on
V
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 the pin 1 of U3 to see if it is low voltage. If not , disassemble R5 or pull it to
low voltage with a lead.
C. If the above actions are not working, replace the Main Board.
ò
T07ꢀSystem down during play
V
Main Board
A. Exclude the condition of using battery. (The system will down when the
voltage is too low.)
B. Disassemble U17 F/W, replace with a good one or re-plug it to see if the
symptom will disappear.
- 26 -
C. 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.
D. Check the capacitors C19 and the diode D6 to see if the reset circuit works normally.
E. If the above actions are not working, replace the Main Board.
DVD ROM
V
V
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.
ò
T08ꢀPower on unstable
V
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 the LDO Q3 to see if it works normally with a 1.8V output voltage.
C. Check the reset circuit refer to the title T07-D.
D. If the above actions are not working, replace the Main Board.
ò
ò
T09ꢀAbnormal sound in the machine base (Power on abnormal sound)
V
DVD ROM
A. Check the loader to see if it is the source of the abnormal sound. If so, replace the loader.
B. If the abnormal sound comes from the audio speakers, check the audion PNP3906
type Q16 and NPN 3904 type Q8/9/10/12/13/15 to confirm the mute circuit works
normally. If not ,change the audion.
T11ꢀDisc drive can’t read (NO DISC)
V
Main Board
A. Remove the top cover, check the 28-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 resistor-array adjacent to U38 and U17 to see if there is
any hollow soldering or cold soldering.
C. If the above actions are not working, replace the Main Board. If it is still not
working, replace the loader.
V
DVD ROM
A. Check the loader to see if it can’t read. If so, replace the loader.
ò
T12ꢀDisc drive no action or locked
V
Main Board
A. Remove the cover. Check to see if it is caused by mis-assembly.
B. Check the resistors or capacitors adjacent to U38 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,
- 27 -
replace the main board.
ò
T13ꢀDisc drive scratches disc
V
Main Board
A. Check the resistors or capacitors adjacent to IC(U17) 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.
V
DVD ROM
A. Check the loader to see if it is the cause of disc scratching. If so, replace the
loader.
ò
T14ꢀNot every disc can be played
V
Main Board
A. Check the resistors or capacitors adjacent to IC(U17) 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.
ò
T15ꢀHead does not work
V
Main Board
A. Remove the top cover, check the 28-pin flat cable and the 2-pin 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 adjacent to IC(U17) 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.
ò
T16ꢀSpindle does not work.
V
Main Board
A. Remove the top cover, check the 4-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 adjacent to IC(U17) 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.
ò
T21ꢀNo video / abnormal
V
Main Board
A. Remove the top cover, check all flat cables in the system to see if they are
- 28 -
correctly plugged to the fixed positions, or re-plug them.
B. Use oscilloscope to measure if Y1 generates 27MHz. If it does not generate
said frequency, and the problems such as cold or hollow soldering have been
ruled out, it maybe Y1 work abnormally . Replace Y1 with a 27MHz
fundamental frequency oscillater.
C. Check if U17(F/W) IC has any problem.
D. Check if switch for TFT on/off is normal; replace a new one if necessary.
E. If the above actions are not working, replace the Main Board.
V
V
Driver Board
A. Check VR6,VR4,VR1,VR7,VR5 is using the correct component. Also check if
it’s damaged.
B. Adjust VR4,VR6,VR1,VR7,VR5 to the appropriate value.
DVD ROM (less likely to happen)
A. If it is useless to change the main board, then replace the loader.
ò
T22ꢀVideo no video / abnormal
V
Main Board
A. Remove the cover. Check 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 U17Pin175 and Pin182 to see if
there is CVBS signals.
E. If the above actions are not working, replace the Main Board.
ò
T23ꢀS-Video no video / abnormal or black & white
V
Main Board
A. Remove the cover. Check 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.
- 29 -
D. If the above actions do not work, then check U17 Pin179 and Pin181 to see
if there is Y and C signals.
E. If the above actions are not working, replace the Main Board.
ò
T24ꢀVCD abnormal picture
V
Main Board
A. Check main board 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 adjacent to IC(U17) 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.
V
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.
ò
T25ꢀDVD abnormal picture
V
Main Board
A. Check U17 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 adjacent to IC(U17) 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.
V
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.
ò
T26ꢀPicture subtitle abnormal display or no display
V
Main Board
A. Remove the top cover and dis-assemble F/W (U17). 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 U17 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.
ò
T27ꢀSetting menu abnormal picture
V
Main Board
A. Check U17 to see if there is any cold or hollow soldering and rule out the problem.
- 30-
B. Remove and dis-assemble U7 with a 16Mbit SDRAM.
C. If the above actions are not working, replace the Main Board.
T31ꢀAudio /left channel (AOL) no sound or abnormal sound
ò
ò
ò
V
Main Board
A. Remove the cover. Check U15 on the Main board to see if there is any cold
soldering, hollow soldering, or damage. Rule out the problem.
B. 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.
T32ꢀAudio /right channel (AOR) no sound or abnormal sound
V
Main Board
A. Remove the cover. Check U15 on the Main 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.
T33ꢀMP3 abnormal sound
V
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 the resistors or capacitors adjacent to IC(U17) to see if there is any
hollow soldering or cold soldering.
C. If the above actions are not working, replace the main board. If it is still not
working, replace the loader.
ò
T34ꢀAudio no waveform (sound) or waveform (sound) abnormal
V
Main Board
A. Remove the cover. Check U15 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.
ò
T41ꢀEarphone Audio no waveform (sound) or waveform (sound) abnormal
V
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.
- 31 -
B. Check U19,U15 and J4,CON3 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.
T42ꢀEarphone Audio right no waveform (sound) or waveform (sound ) abnormal
ò
ò
ò
V
Main Board
A. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering
and rule out the problem. Especially check for C24,C26,C28.
B. If the above action does not work after the inspection, replace the main board.
T43ꢀEarphone Audio left no waveform (sound) or waveform (sound) abnormal
V
Main Board
A. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering
and rule out the problem.Especially check for C27,C36,C67.
B. If the above action does not work after the inspection, replace the main board.
T51ꢀVideo can’t be still or stopped
V
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.
V
Main Board
A. Check to see if U17 is damaged, and check all parts following U17 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 U17 is damaged.
C. If the above actions are not working, replace the Main Board.
ò
T52ꢀCan’t execute fast forward or rewind
V
Main Board
A. Check to see if U17 is damaged, and check all parts following U17 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 U17 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 (U11).
ò
ò
T53ꢀPanel button
V
Main Board
A. Check U17 and 11-pin plug in jack CON2 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, check the 11pin cable to see if there is any damage.
C. If the above actions are not working, Replace the control board or the main board.
T61ꢀCan’t enter the system setting
- 32 -
V
Main Board
A. Check U17 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. If the disk is abnormal, ask for a new version software .
ò
ò
T62ꢀSystem can’t play or system down after setting
V
Main Board
A. Check U17 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 (U11).
T71ꢀTFT image and color error
V
Main Board
A. Check the 11-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 U17 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
V
A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check Y1,Y2 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.
ò
T72ꢀTFT image is black and white
V
Main Board
A. Check the 11-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 U17 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
V
- 33 -
A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
D. Check Y1,Y2 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.
T73ꢀTFT image shakes or is distorted
ò
V
Main Board
A. Check the 11-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 U17 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
V
A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
D. Check Y1,Y2 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.
ò
T74ꢀTFT PAL color strip
V
Driver Board
A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering
- 34 -
of IC or parts missing.
E. Check Pin 1 to Pin 16 on U202 for any cold or hollow soldering and reverse
soldering of IC or parts missing.
F. If the above actions are not working, replace the Driver Board.
ò
T75ꢀTFT ripple
V
Main Board
A. Check the 13-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 high-voltage 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
V
V
A. Measure the voltage U1 to see if it is correct.
B. Check the devices surrounding VR202 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
C. If the above actions are not working, replace the Driver Board.
High-Voltage Board
A. Check the 3-pin cable connected to the high-voltage 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.
V
Panel
A. Check the sharing cable connected to the high-voltage 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.
- 35 -
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