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Service Manual
Portable DVD Player
Model: DPC-7400 Series
S/ M No. : OSPC740001
May. 2005
Caution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list.
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Revision Record
Date Rev No Section Description
17/Oct./ 2005 0.1 New edition
Design and specifications are subject to change without notice. All trademarks used in the specifications are the property of their respective owners.
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1. Gen er al Descr ip t io n s
1.1. Model Features.
1.2. Information
2. Elect r ical Ch ar act er ist ics
2.1. Optical Characteristics
2.2. Electrical Characteristics..
2.3. System Block Diagram.
3 . Pow er .3.1. Power Supply.
3.2. Rechargeable Battery. .
4. Dim ensi on & Phy sical Char act er is t ics.
4.1. Outline Dimension.
4.2. Physical Characteristics..
4.3. Exploded View
5. Regu lat or y Sta n da r ds.. 5.1. Safety..
5.2. EMI.
5.3. Ergonomics.
6. Ser vi ce Tools and Equi pm ent .
6.1. Service Tools and Equipment ..
6.2. Storing and Handling Test Discs..
6.3. Notes..
7 . Spar e Par t s.
7.1. key Parts List..
8. Tro u bl e sh oo t in g
8.1. Error Code Table ..
8.2. Debug & Trouble Shooting ..
1
1
2
3
3
3
4
1 1
11
11
1 3
13
13
14
1 5
15
15
15
1 6
16
16
17
1 9
19
2 0
20
21
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- 1 -
1 General Descriptions1.1 Model Features
Video: DVD Playback, MPEG4(option) ,DivX(DivX Model),Kodak Picture CD compatible& JPEG readable
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: 200mm(L) x 155mm(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
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- 2 -
1.2 Information
Disk Format DVD, VCD, CD, MP3, CD-R, CD-RW, MPEG4 (OPTION),JPEG,
Kodak Picture CD, DivX(DivX Model),WMA
Video System NTSC / PAL/Auto
Video Decompression MPEG-2 (ISO/IEC-13818), MPEG-1
Video Output 800~1200mVpp/75 ohm
Audio Characteristic 2-Channel Analog
Analog Output 1.0~2.0Vrms/10K ohm
Frequency Response DVD: 48kHz Sampling: 20Hz-20kHz
CD: 20Hz-20kHz
S/N Ratio
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- 3 -
2 Electrical Characteristics2.1 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) 86.08 (V) mm
Dot Pitch 0.107 (H) 0.370 (V) mm
Pixel Configuration StripeOutline Dimension 166.0 (W) 100.0 (H) 7.2 (D)(typ.) mm
Surface Treatment Anti-Glare and Hard Coating
Weight 180 10 g
2.2 Electrical Characteristics
DVD/ SVCD/ VCD/ CD system decoding, packeted element streams and audio, video elementstreams.
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
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- 4 -
2.3 System Block Diagram
2.3.1. The System Block Diagram & the Block's Function Description
DC To DC
MP1580
1. Loader
DM-520A
2. Servo +MPEG
MT1389D/MT1389C
DISPLAY
7 TFT LCD
PW070XU3
INVERTER
TFT LCD Driver
IR3Y29B +HX8806
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- 5 -
2.3.2 Schematic Circuit Diagram
( 1 ) P O W E R _ M P S
1
DELETA
9VIN
+3.3V +
5V
NCTR_5V
CTR_5V
LDO_AV33
RFV33
NCTR
_5V
9VIN
+5V
+3.3V
CTR_5V
NCTR_5V
+3.3V
RFV33
+3.3V
LDO_AV33
RM4
39K
QM1
OPEN/3904
1
2 3
UM1
MPS1580
1234
8765
BSVinVsw
GND
Sync
EN
CompFB
CM7
220uF/6.3V/LU
D1LED1
1
3
2
C135
2
2uF
C410
uF
UM2
MPS1580
1234
8765
BS
Vin
Vsw
GND
Sync
EN
CompFB
LM4
6.8uH
RM7
OPEN
R13
30O
+
C120
22
0uF/6.3V/lu
RM3
30.9K
RM12
OPEN/10K
CB59
0.1uF
RM11
4.7K/open
+
C121
22
0uF/6.3V/lu
L26
FB
RM110K1%
R156
4.7k/open
CB60
0.1uF
RM10
10K
RM8
16.9K
L27
FB
RM9
OPEN
RM2
33R
Q1
3904
1
2 3
CM3
0.022uF
CM1
0.01uF
CM5
100pF
CM10
100pF C
M9
0.022uF
CM8
0.01uF
RM610K1%
LM2
6.8uH
RM5
10K
C136
22uF
C119
10uF
DM1
DIODE
1 2
CM2
100uF/10V/LU
DM2
DIODE
1 2
LM122
uH
LM322
uH
R2
330O
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- 6 -
(2) POWER FOR TFT
1
11
1
1
-10V_TFT
+15V_TFT
+7.5V_TFT
VSYNC#
POWDET_MCU
+3.3V_TFT
+5V_TFT
+5V_TRAN
VIN
+3.3V
+5V
V18
+3.3V_TFT
+
5V_TRAN
9VIN
VOUT
9VIN
CTR_LOAD
CTR_AUDIO
POWDET_MPEG
CTR_TFT5V
POWDET_MCU
+5V_TRAN
HSYNC#
VCC
+5V_TFT
+7.5V_TFT
+3.3V_TFT
-10V_TFT
VCC
+15V_TFT
+3.3V
V18
+3.3V
+5V
9VIN
POWDET_MCU
POWDET_MPEG
CTR_LOA
D
CTR_AUD
IO
POWDE
T_MCU
POWDE
T_MPEG
CTR_TFT5V
+5V_TRAN
CTR_TFT
5V
+3.3V
+5V
+7.5V_TFT
+5V_TRAN
-10V_TFT
+
15V_TFT
+3.3V
+3.3V
+3.3V
+
C13
47uF/25V/LU
C15
0.1uF
C118
0.1uF
+ -
U3A
LM393
3 2
1
84
C7
100uF/10V/LU
R3
10k(8.2K)
R8
0(1.8K)
R9
3.9K
L2
20uH
Q2
BSH1051
32
C1
100uF/6.3V/LU
R15
1.6M
U1
RT9167A-185CS
1 2
34
5
6
7
8
SHDN-
IN
OUT
BP
GND
GND
GND
GND
R6
3.3K
R18
560K
C18
0.1uF
+ -
U3B
LM393
5 6
7
84
C
17
1
000pF
D
4
1
N5819
1
2
L1
20uH
Q18
OPEN/3904
1
2 3
C2
0.1uF
C11
22uF/25V/LU
J1
POWERJACK 132
C5
0.01uF
R11
20K
R158
330O
C10
47uF/25V/LU
CON1
BATTERY 21 3 4
VIN
GND
OUT
PDET
R5
3K
+
C9
47uF/25V/LU
U6
BA05SFP
45
3
21
6 VOUT
NC
GND
VIN
CTL
GND
R7
3K
+
C16
100uF/16V/LU
R157
OPEN/10K
D2
RB053L-30
1
2
R159
4.7K/open
R13
20K
R160
4.7k/open
C3
47uF/25V/LU
D3
1N5819
1
2
C6
100uF/6.3V/LU
R12
220R
C12
0.1uF
U22
RT9262
1
2
3 4
5
6
7
8
GND EXT
LFB
LDOO
FB
VDD
LX
CE
R4
47K
U5
TER9.5*100M
1
3
6
5
7
8
1
3
6
5
7
8
R16
0R
R10
47K
R14
1M
R17
200K
D
5
1
N5819
1
2
C14
0.1uF
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- 8 -
(4) SDRAM&FLASH&EEPROM
TSOP4
8
pin
IIC D
RAM
FLASH
16Mb
32Mb
8M1
6M
32MFLA
SH
delete
DQ[0..1
5]
AD
[0..7
]
BA
[0..1
]
DQM
[0..1
]
MA
[0..11
]
A[0..21
]
A9
A3
AD
3
A1
A1
9
A4
AD
6
AD1
A17
A1
6
A1
3
A14
AD
0
A2
A6
A8
A1
8
AD7
A7
AD
5
A12
A1
5
A1
0
AD2
AD4
A11
A5
A0
RA
S#
PCE
#CA
S#
PRD
#D
CKE
SDA DC
LK
SCL
PWR
#
CS#
WE
#
DCS#
DCA
S#
DRA
S#
DWE
#
WE
#
RA
S#
CS#
CA
S#
BA
0
DCKE
BA1
DCLK
SD
CKE
DBA
0
DBA1
SD
CLK
A2
0
AA2
0
PCE
#
PRD
#
PWR
# AA2
0
AA21
SCL
SDA
VCC DV
33
DQ9
MA7
MA
3
MA
9
DCS#
DQ0
DQ12
MA
8
MA4
MA
0
DWE
#
DQ11
DQM
0
DQ4
DQ1
3
DBA
0
MA
5
DQ1
DCA
S#
DQ5
MA2
DQ6
DQ8
DQ14
DQ1
5
SD
CKE
DQ7
DQ2
MA1
MA1
0
DQM1
DQ3
SD
CLK
DRA
S#
MA
6
DQ1
0DQ0
MA
6
DCA
S#
DQ5
SD
CLK
DQ1
0
DRA
S#
DBA
0
DWE
#
DQ1
MA
9
MA4
DBA1
DQ7
MA1
MA2
DQM
0
DQM1
MA1
0
DQ6
DQ11
DQ1
5
MA7
DCS#
DQ1
3
DQ8
SD
CKE
DQ4
DQ14
DQ2
DQ3
MA
3
MA
5
MA
0
DQ9
MA
8
MA11
DQ12
AA21
A21
DQ6
SD
CKE
DQ1
DQ1
5
DQ9
DQM
0
MA
5
DBA
0
DQ0
DQ1
0
DQM1
DCA
S#
DQ11
DQ8
MA4
DQ14
MA
8
DRA
S#
DWE
#
DQ3
DBA1
DQ7
GND
MA2
DQ2
MA7
MA1
SD
33
MA
3
DQ1
3
SD
CLK
DQ5
DQ12
MA
6
MA
0
MA
9
MA1
0
DQ4
SDA
[2
]
DQM
[0..1
]
[2
]
BA
[0..1
]
[2
]
WE
#
[2
]
PCE
#
[2
]
CA
S#
[2
]
AD
[0..7
]
[2
]
CS#
[2
]
DCKE
[2
]
PRD
#
[2
]
SCL
[2
]
DCLK
[2
]
PWR
#
[2
]
MA
[0..11
]
[2
]
DQ[0..1
5]
[2
]
RA
S#
[2
]
A[0..21
]
[2
]
VCC
[1
]
GND
[1
,2,3,4,5]
DV
33
[1
]
SD
33
D
V33
SD
33
SD
33
SD
33
FLA
SH
_V
CC
FLA
SH
_V
CC
FLA
SH
_V
CC
SD
33
V
CC
FLA
SH
_V
CC
DV3
3
SD
33
SD
33
SD
33
SD
33
SD
33
SD
33
R68
680
CB
38
0.1
uF
L2
3
FB
CB
52
0.1
uF
CB42
0.1
uF
R64
33
CB4
5
0.1
uF
L24
NO_USE
R66
33
CB
50
0.1
uF
R2
54
680
U8ES
MTM12L1
61
61A-7 1 234 567 891
011
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VCC
DQ0
DQ1
VSSQ
DQ2
DQ3
VCCQ
DQ4
DQ5
VSSQ
DQ6
DQ7
VCCQ
DQML
WE
CA
S
RA
S
CS
BA
/A11
A1
0
A0
A1
A2
A3
VCC
VSS
A4
A5
A6
A7
A8
A9
NC
CKE
CLK
DQMH
NC
VCCQ
DQ8
DQ9
VSSQ
DQ1
0
DQ11
VCCQ
DQ12
DQ1
3
VSSQ
DQ14
DQ1
5
VSS
CB
54
0.1
uF
CB
37
0.1
uF
CB41
0.1
uF
U9ES
MTM12L
641
64A
/N.C
TSOP
54
1 2412
579 810
46
11
13
15
16
17
18
19
35
22
23
24
25
26
14
41
29
30
31
32
33
34
36
37
38
39
40
43
42
44
52
45
47
49
48
50
51
53
54
20
21
36 27
28
VCC
DQ0
DQ1
VSSQ
DQ2
DQ3
VCCQ
DQ4
DQ5
VSSQ
DQ6
DQ7
DQML
WE
CA
S
RA
S
CS
A11
A1
0/AP
A0
A1
A2
A3
VCC
VSS
A4
A5
A6
A7
A8
A9
NC
CKE
CLK
DQMH
NC
VCCQ
DQ8
DQ9
VSSQ
DQ1
0
DQ11
VCCQ
DQ12
DQ1
3
DQ14
DQ1
5
VSS
BA
0/A1
3
BA1
/A12
VCCQ
VSSQ
VCC
VSS
R67
10k
CB4
9
0.1
uF
RN1
33x4
1
2
3
4
5
6
7
8
+
CE2
3
22
0uF
/16V
CB4
8
0.1
uF
R62
R
CB
36
0.1
uF
+
CE22
22
0uF
/16V
CB4
0
0.1
uF
U12
EEPR
OM24
C1
6
SOP-8
1234
5 6 7 8
NC
NC
NC
GND
SDA
SCL
WP
VCC
CB44
0.1
uF
CB
53
0.1
uF
CB47
0.1
uF
U7ES
MTM12L1
61
61A-7 1 234 567 891
011
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VCC
DQ0
DQ1
VSSQ
DQ2
DQ3
VCCQ
DQ4
DQ5
VSSQ
DQ6
DQ7
VCCQ
DQML
WE
CA
S
RA
S
CS
BA
/A11
A1
0
A0
A1
A2
A3
VCC
VSS
A4
A5
A6
A7
A8
A9
NC
CKE
CLK
DQMH
NC
VCCQ
DQ8
DQ9
VSSQ
DQ1
0
DQ11
VCCQ
DQ12
DQ1
3
VSSQ
DQ14
DQ1
5
VSS
L2
5
FB
CB
51
0.1
uF
CB
39
0.1
uF
U11
STM2
9W1
60/MX2
9LV
800(160)
25
24
23
22
21
20
19
188
10
28
47
16
29
31
33
35
72
6
38
40
42
44
30
32
14
36
39
41
43
45
37
27
11 9
34
46
64 53214
817
12
A0
A1
A2
A3
A4
A5
A6
A7
A8
A2
0
OE
BYTE
A1
8
D0
D1
D2
D3
A9
CE
D4
D5
D6
D7
D8
D9
WP
/ACC
D11
D12
D1
3
D14
D1
5
VCC
GND1
WE
A1
9
D1
0
GND2
A1
0
A12
A11
A1
3
A14
A1
5
A1
6
A17
RE
SET
R7
0
10k
CB4
3
0.1
uF
+
CE24
47
uF
/16V
CB4
6
0.1
uF
R65
33
R63
33
R61
R
+
CE2
5
47
uF
/16V
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- 9 -
(5) VIDEO OUTPUT
1
1
TFTI/O
2N3904
3
C
E
2
B
1
TFT
_CVB
S
-10V
_TFT
9VIN
+3.3V
_TFT
+7.5V
_TFT
+1
5V
_TFT
+5V
_TFT
ASPDIF
Y[3
..6]
CVB
S_TFT
VIDE
O_TV
INT
/EXT
P/N
ASPDIF
+5V
_TRAN
TFT
_OUT
TFT
_CVB
S
SVIDE
O_Y
SVIDE
O_C
SCALE
VIDE
O_TV
TFT
_OUT
CVB
S_TFT
CVB
S_OUT
P/N
SCALE
+5V
_TRAN
+5V
_TFT
+5V
Y3
Y
4Y
5
CVB
S_OUT
Y
6
CVB
S_OUT
+1
5V
_TFT
9VIN
+5V
_TFT
-10V
_TFT
+7.5V
_TFT
+3.3V
_TFT
ASPDIF
Y[3
..6]
INT
/EXT
P/NSC
ALE
TFT
_OUT
CVB
S_TFT
CVB
S_OUT
+5V
_TRAN
+5V
_TFT
+5V
+5V
+5V
F2
FB
C1
32
330
pF
F1
FB
C1
31
0.1
uF
F4
FB
F5
FB
F6
FB
F7
FB
F8
FB
F9
FB
R1
54
100R
F11
FB
F12
FB
L22
1.8
uH
L4
30
L1
8
1.8
uH
R14
6
150R
C4
3
47
pF
L4
5
1.8
uH
R14
9
150R
C44
47
pF
L44
0
J1
0
VIDE
O
/COAXIAL
5 4 2 3 1
GN
D
GN
D
VID
EO
CO
AXIAL
VID
EO
C12
9
OPEN
C4
6
27
0p
F
C1
30
330
pF-OPEN
C4
5
27
0p
F
F1
0
FB
CON4
109874321 5 6
11
12
13
VIDE
O
NT
SC/PAL
GND
-10V
_TFT
+5V
_TFT
+7.5V
_TFT
+1
5V
_TFT
HV
GND
+3.3V
+9VP
OWER
VGND
MODE
SCALE
C51
47
pF
R1
51
150R
C124
330
pF-OPEN
Q17
3904
1
2 3
F3
FB
C4
8
47
pF
C12
8
47
pF
R1
50
4.7K
R1
52
75R
C122
47
pF
C4
9
47
pF
R14
8
4.7K
L21
1.8
uH
Q1
6
3904
1
2 3
C11
3
47
pF
R14
5
4.7K
J7
S_VIDE
O
5 4 2 3 1
GND
GND
S_Y
S_C
S_Y
L1
9
2.7
uH
L2
0
2.7
uH
R147
4.7K
C1
33
27
0p
F
+
C12
6
330uF
/6.3V
C12
3
OPEN
C1
34
47
0p
F
C127
0.1
uF
F1
3
FB
R
153
100R
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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.) Hiteker DC12V/2.7A adaptor.
b.)Hiteker DC12V/2.7A 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 Hiteker DC12V/2.7A adaptor or
Hiteker DC12V/2.7A adaptor and portable DVD (power off status).
Discharge: Using the battery pack as the power source for portable DVD that in DVD discplaying mode, the discharging time must be exceed 2.5hrs.
3.2.1 Electrical Protection
The battery pack shall be capable of withstanding a continuous short circuit output without damage.
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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
Charge Time
(hr)
DVD Title
Play Time (hr)
Styling
Ni-MH2400mAh
(6S1P)4~5 2.5
For DPC-7400 Series
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4 Dimension & Physical Characteristics
4.1 Outline Dimension
200mm(L) x 155mm(W) x 38mm(H)
4.2 Physical Characteristics
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Drawn:
NO
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4.3 Exploded View
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5 RegulatoryStandards
5.1 Safety
UL FDA
5.2 EMI
CE FCC
5.3 Ergonomics
Dolby
LVD
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6Service Tools and Equipment
6.1Service Tools and Equipment Table
Application Name
DVD Testing DiscGeneral
General Tools screwdriver etc.
CD Testing DiscConfirm
VCD Testing Disc
Oscillograph
Probes
AV Cables
Adjust
TV Monitor
Searing-iron
Antistatic wrist strapGrounding for electrostatic breakdown
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.
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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
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or death.
This unit should be situated away from heat source, such as amplifiers, radiators,stoves or any other units producing heat.
CondensationLens 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.
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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 cant be still or stop
T52 Cant execute fast forward or rewind
T53 Panel button
System Setting Test
T61 Cant 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
6.2 Debug & Trouble Shooting
CB for any missing components and bad soldering T01No Power
Main BoardA. Check for components on the Main Boardto 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 Boardto 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. T02Power LED indicator not on or insufficient brightness
Main BoardA. Open the cover of the portable DVD-player to inspect if LEDfunctionsnormally.
T75 TFT ripple
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 ,
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Please replace with a good one.
D. Disassemble F/W, replace with a good one or re-plug it to see if the LED lightsup when Power ON.
E. If the above actions are not working, replace the Main Board. T03Loading time too long
Main BoardA. 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.
T04Remote control bad sensing or sensing not functional Remote control
C. If the above actions are not working, replace the Main Board.
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 BoardA. Remove the top cover and the panel. Check to see ifIR1 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.
T05Stay in the Run In condition after power on, cant be tested Main Board
A. The same refer to T03.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 correctlyplugged 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 tolow voltage with a lead.
C. If the above actions are not working, replace the Main Board. T07System down during play
Main BoardA. Exclude the condition of using battry. (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 thesymptom will disappear.
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C. Remove the top cover, check all flat cables in the system to see if they arecorrectly 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
A. Check the loader to see if it is not stable (any condition that some of the discscant be played). If so, replace the loader.
DVD DISCA. 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 arecorrectly 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. T09Abnormal sound in the machine base (Power on abnormal sound)
DVD ROMA. 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
T11Disc drive cant read (NO DISC) Main Board
A. Remove the top cover, check the 28-pin flat cable in the system to see if theyare 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 isany hollow soldering or cold soldering.
type Q16 and NPN 3904 type Q8/9/10/12/13/15 to confirm the mute circuit works
normally. If not ,change the audion.
C. If the above actions are not working, replace the Main Board. If it is still notworking, replace the loader.
DVD ROMA. Check the loader to see if it cant 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 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,
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replace the main board.
T13Disc drive scratches disc Main Board
A.
Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollowsoldering, 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.
DVD ROMA. 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 adjacent to IC(U17) to see if there is any hollowsoldering, 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 28-pin flat cable and the 2-pin cable in thesystem 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 hollowsoldering, 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 4-pin flat cable in the system to see if theyare 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 hollowsoldering, 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
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correctly plugged to the fixed positions, or re-plug them.
B. Use oscilloscope to measure if Y1 generates 27MHz. If it does not generatesaid frequency, and the problems such as cold or hollow soldering have been
ruled out, it maybe Y1 work abnormally . Replace Y1 with a 27MHzfundamental frequency oscillater.
C. Check if U17(F/W) IC has any problem.D. Check if switch for TFT on/offis normal; replace a new one if necessary.E. If the above actions are not working, replace the Main Board.
Driver Board
B. Adjust VR4,VR6,VR1,VR7,VR5 to the appropriate value.A. Check VR6,VR4,VR1,VR7,VR5 is using the correct component. Also check if
its 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 the main board to see if there is any cold or hollowsoldering and rule out the problem.
B. Remove the top cover, check all flat cables in the system to see if they arecorrectly plugged to the fixed positions, or re-plug them.
C. Check RLC following CVBS to see if there is any wrong parts, cold and hollowsoldering, 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 ifthere is CVBS signals.
E. 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 the main board to see if there is any cold or hollowsoldering and rule out the problem.
B. Remove the top cover, check all flat cables in the system to see if they arecorrectly 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 andhollow soldering, short circuit, broken circuit, broken parts and rule out the
problem.
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D. If the above actions do not work, then check U17 Pin179 and Pin181 to seeif there is Y and C signals.
E. If the above actions are not working, replace the Main Board.
T24VCD abnormal picture Main Board
A. Check main board to see if there is any cold or hollow soldering and shortcircuit problem and rule out the problem.
B. Check the resistors or capacitors components or those adjacent to IC to seeif 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 makingsure if the disc has any scratches or dirt, if no such problems then replace the
loader.
T25DVD abnormal picture Main Board
A. Check U17 to see if there is any cold or hollow soldering and short circuitproblem and rule out the problem.
B. Check the resistors or capacitors components or those adjacent to IC to seeif 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 makingsure 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 (U17). Replace it with a goodF/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 circuitproblem and rule out the problem.
C. If the above actions are not working, replace the Main Board. T27Setting menu abnormal picture
Main BoardA. Check U17 to see if there is any cold or hollow soldering and rule out the problem.
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Main BoardA. 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 orF/W is bad.
C. If the disk is abnormal, ask for a new version software . T62System cant play or system down after setting
Main BoardA. 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 orF/W is bad. Replace the main board or re-burn the F/W (U11).
T71TFT image and color error Main Board
A. Check the 11-pin cable connected to the driver board to see if there is anyproblem of plugging. Rule out the problem.
B. Check devices after Y/C signal to see if there is any cold or hollow solderingand reverse soldering of IC or parts missing.
C. Check U17 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
D.
If the above actions are not working, replace the Main Board. Driver Board
A. Measure the voltages ofVGH,VGE,VCC,VDD,VIN and VSS to see if they arecorrect.
B. Check VC1 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
C. CheckY1,Y2 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
D. If the above actions are not working, replace the Driver Board. T72TFT image is black and white
Main BoardA. 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 solderingand reverse soldering of IC or parts missing.
C. Check U17 to see if there is any cold or hollow soldering and reverse solderingof 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 VGH,VGE,VCC,VDD,VIN and VSS to see if they arecorrect.
B. Check VC1 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollowsoldering and reverse soldering of IC or parts missing.
D. CheckY1,Y2 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
E. If the above actions are not working, replace the Driver Board. T73TFT image shakes or is distorted
Main BoardA. 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 solderingof IC or parts missing.
D. If the above actions are not working, replace the Main Board. Driver Board
A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they arecorrect.
B. Check VC1 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollowsoldering and reverse soldering of IC or parts missing.
D. CheckY1,Y2 to see if there is any cold or hollow soldering and reverse solderingof IC or parts missing.
E. If the above actions are not working, replace the Driver Board. T74TFT PAL color strip
Driver BoardA. 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 solderingof IC or parts missing.
C. Check the devices surrounding U1 and U201 to see if there is any cold or hollowsoldering and reverse soldering of IC or parts missing.
D. CheckY1,Y2 to see if there is any cold or hollow soldering and reverse soldering
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