LG DP170 User manual

DVD PORTÁTIL
MANUAL DE SERVICIO
MODELO : DP170
MODELO : DP170MANUAL DE SERVICIO
P/NO : AFN30347573 Printed in Korea MAY, 2006
PRECAUCIÓN
ANTES DE UTILIZAR LAUNIDAD, LEALAS "PRECAUCIONES DE SEGURIDAD"
EN ESTE MANUAL.
Av. Sor Juana lnés de la Cruz No 555
Col. San Lorenzo
Tlalnepantla, Estado de México CP 54033
Tel. [phone] Fax. [phone]
Lada sin costo 01 800 50 481 00

1-1
CONTENTS
SECTION 1 . . . . SUMMARY
SECTION 2 . . . . EXPLODED VIEWS
SECTION 3 . . . . ELECTRICAL
SECTION 4 . . . . REPLACEMENT PARTS LIST

1-2
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ............. 1-3
SERVICING PRECAUTIONS................................................................................................... 1-4
SPECIFICATIONS ...................................................................................................................... 1-5

1-3
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY,
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC-
TURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY
VOID THE WARRANTY, BUT MAY LEADTO YOUR BEING LIABLE FORANY
RESULTING PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE
THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY
CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE,
INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE
USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC-
TION FROM A.C. LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A
CHECK SHOULD BE MADE OF THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY
AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.
THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE
TRANSPORTED TO AND FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES
SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN
RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE
BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THE
SAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEEN
DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD
SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS.
BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION
TO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGED
INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY
FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR
A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND
PROTRUNING METAL SURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF
RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT
FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS
OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIR-
CUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.
LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABI-
NET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HAN-
DLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE
WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE
ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLT-
METER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, IN
THE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESIS-
TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR
BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CON-
DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.
MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500
OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG
AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED
METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75
VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY
VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK
HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT: GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN
AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE”THAT MAY BE OF SUFFICIENT MAG-
NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN-
GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO
THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN
SERVICE LITERATURE.
SUBJECT : X-RADIATION
1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER-
SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN-
TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC-
TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN
THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE
PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA-
TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC-
TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR-
CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR-
ABLE LEVELS.
2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE
USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN
COLOR SETS, ALWAYS RE-INSTALL THEM.
3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN
ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA
TION OF THE METER SHOULD BE CHECKED PERIODICALLY
AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE
AT YOUR DISTRIBUTOR.
4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY
THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY
TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD
BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE
WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES
NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING
CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA-
NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU-
LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE-
DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON
EACH CUSTOMER’S INVOICE.
5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN
A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE,
AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND
THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT
LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES
SIVE VOLTAGE.
6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS
(WHERE USED).
SUBJECT: IMPLOSION
1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE
GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE
TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID
SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.
2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.
SUBJECT : TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY-
HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO
HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO
INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA-
TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC.
3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR
VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC-
ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT
OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER-
CIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED
MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR
PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT
THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW
ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS
MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE
TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON
SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS
MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ-
ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS
THRESHOLDS OR DEEP PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND
WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES,
INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION
RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.’S OF
THE SAME OR LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS,
EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN-
GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO
HOME AND FAMILY.
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE. CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

1-4
SERVICING PRECAUTIONS
CAUTION : Before servicing the PORTABLE DVD covered
by this service data and its supplements and addends, read
and follow the SAFETY PRECAUTIONS. NOTE : if unfore-
seen circumstances create conflict between the following
servicing precautions and any of the safety precautions in
this publications, always follow the safety precautions.
Remembers Safety First:
General Servicing Precautions
1. Always unplug the PORTABLE DVD AC power cord from
the AC power source before:
(1)Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2)Disconnection or reconnecting any internal electrical
plug or other electrical connection.
(3)Connecting a test substitute in parallel with an elec-
trolytic capacitor.
Caution : A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
2. Do not spray chemicals on or near this PORTABLE DVD
or any of its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this PORTABLE DVD and/or
any of its electrical assemblies unless all solid-state
device heat sinks are cerrectly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connection the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter(500V)
to the blades of the attachment plug. The insulation resis-
tance between each blade of the attachment plug and acces-
sible conductive parts (Note 1) should be more than 1M-
ohm.
Note 1 : Accessible Conductive Parts including Metal pan-
els, Input terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor compo-
nent or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commer-
cially available discharging wrist strap device, which
should be removed for potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grouned-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified a “anti-static”can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec
tive package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with
leads electrically shorted together by conductive foam,
aluminum foil, or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution : Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static elec-
tricity sufficient to damage an ES device.)

1-5
SPECIFICATIONS
[DVD player]
Power supply DC 9.5V (AC adapter terminal), DC 7.4V (Battery)
Power consumption 12 W with battery
Weight 12.6 ibs (0.66kg)(without battery pack)
External dimensions(W X D X H) (186 X 150 X 25mm)
Signal system NTSC
Laser Semiconductor laser, wavelength 650 nm (DVD),
780nm(CD)
Frequency range (audio) DVD linear sound:48KHZ sampling 4 HZ to 20KHZ
96KHZ sampling 4 HZ to 44 KHZ
Signal-to-noise ratio(audio) More than 95dB
Dynamic range(audio) More than 95dB
Harmonic distortion(audio) 0.08%
Operatingconditions(audio) Temperature: 41°F to 95°F, Operation status: Horizontal
[Connectors]
Video input/output(VIDEO IN/OUT) 1.0V(P-P),75R,negative sync ø3.5m X 1
Audio output (optical audio) Optical connector (ø3.5mm) X 1
Audio input/output 2.0Vrms (1 KHZ,0 dB), ø3.5m X 1
(AUDIO IN/OUT, analog audio)
Earphone terminal ø3.5mm stereo mini jack X 1
[Liquid Crystal Display]
Panel size 7 inches (16:9)
Projection system TN color transmission
Driving system TFT active matrix
[Supplied Accessories]
RC Aaudio/Video cable 1
AC Adapter (AD-DP40) 1
Power Cord 1
Battery Pack (DP-BT50) 1
Remote control 1
Battery for Remote control (Lithium) 1

2-1
SECTION 2
EXPLODED VIEWS
CONTENTS
EXPLODED VIEWS .....................................................................................................................................2-2
1. CABINET AND MAIN FRAME SECTION ..................................................................................................2-2
2. PACKING ACCESSORYSECTION...........................................................................................................2-3

2-22-2
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
A48
A40
293
278
275 281
285
A46 A47
A42
A00
283
282
296
295
292
A51
272
277
277
267
284
275
262
260
266
265
264
A49A
A46A A45A
A44A
LCD
A
5
4
3
2
1
BCD

2-3
2. PACKING ACCESSORY SECTION
808 BATTERY
802A BOX INNER
834 CABLE, CIJAR JACK
806 PLUG ASS'Y
833 ADAPTER
900 REMOTE CONTROL
801 OWNER'S MANUAL
804 PACKING SHEET
803 PACKING
802 BOX CARTON

3-1
SECTION 3
ELECTRICAL
CONTENTS
LCD PART ................................................................................................................3-2
LCD TROUBLE SHOOTING GUIDE .....................................................................3-3
LCD BLOCK DIAGRAM........................................................................................3-5
LCD CIRCUIT DIAGRAMS ....................................................................................3-7
LCD PRINTED CIRCUIT DIAGRAMS....................................................................3-9
MAIN PART ............................................................................................................3-11
MAIN ELECTRICAL TROUBLE SHOOTING GUIDE...........................................3-11
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING..............3-19
MAIN BLOCK DIAGRAMS...................................................................................3-28
MAIN CIRCUIT DIAGRAMS.................................................................................3-30
MAIN PRINTED CIRCUIT DIAGRAMS................................................................3-56

1) Power measuring
Measure each power after power supply.
C83(-) : -14.5V, C82(+) : +15V,C100 : +7.5V,C97(+) : +5V,C43(+) : 3.3V
2) VCOM waveform adjustment
Adjust the VCOM level while changing the VR1 as below waveform by using the scope in the
C84.
3-2
Vcom Waveform
63.5
63.5
µs
5.
5.
3Vp-p
3Vp-p
0.7V
4.6V
G
ND
GND
LCD PART

3-3
DESPLAY CONDITION? INVERTOR ABNORMAL
Appear shadow form
interference in black background
There is only bring light.(LCD B/D abnormal)
Fuse Replace
IC(U1) Check and Replace
D2 ,D3 ,D8 Check
Main B/D on located
IC(U6) Check and Replace
A/V IN S/W Check
IC(U2) Check and Replace
IC(U3) Check and Replace
FUSE NORMAL?
IC(U1) NORMAL OPERAE
7.5V,15V,-14.5V NORMAL?
+5V NORMAL?
Y/C DISPLAY SIGNAL?
R. G .B SIGNAL OUTPUT?
VCOM SIGNAL?(5.5VPP)
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
LCD TROUBLE SHOOTING GUIDE

3-4
LCD MODE CONT SIGNAL?
ALL “LOW”(MORMAL CONDITION)? MAIN B/D Check
Power source and D2,D3,U4 Check
TFT LCD PRESSURE VOLTAGE?
+15V,- 14.5V,+5V
TFT LCD NORMAL? Replace
COLOR ADJUSTING NORMAL? Readjust as adjustement standard
EACH CONNECTOR? Replace and Reassemble
END Replace
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO

LCD BLOCK DIAGRAM
TFT LCD 7" WIDE
INVERTER
TERAMINS T100
DC-DC
CONV
OEH
OEV
STV
STH
CKV
VCOM
RGB
SY
SC
CVBS
15V -14.5V 7.5V 5V
3-5 3-6

3-7 3-8
LCD CIRCUIT DIAGRAMS
82.6ma
126ma
AV
SC
CVBS
S_C
SY S_Y
STH2
U/D
SCL
STH1
IOB
CPH1
L/R
CKV
VCOMO
RSET
AVDD33
S_Y
STV2
OEH
SDA
AV
IOG
OEV
STV1
IOR
S_C
RESET_T
VCOM
5VD
-10V
VCOMO
VB
VR
IOB
7VD5
IOR
IOG
VG
5VD7VD5
+15V
VCC_3V3
-10V SPR+
GND
SPR+
GND
SPL-
RESET_T
SPR-
GND
SDA
SY
VCC_3V3
SPL+
SPL+
GND
GND
SPR-
SPL-
CVBS
SCL
SC
CPH1
CKV
L/R
STV1
STV2
AVCC
U/D
OEH
DVCC
OEV
VB
STH1
VR
VG
+15V
STH2
VCOM
DVCC
VCOM
-10V
VCC_3V3
VDD22
AVDD33
VDD33
VDD33
VDD22AVDD33 VDD33
VDD33
VDD22
VDD33
AVDD33
VDD22
+7.5V BIAS
+7.5V BIAS
+7.5V BIAS
+7.5V BIAS
5VD
R29
10K
R22
100
R31
39K
R11 33
12
C2
0.1uF
D4
BAT54S
3
2
1
C27
0.1uF
R14
1M
12
+
C89 10uF/16V
C16
680pF
C53
100pF
C51
0.1uF
R43
150k
Y1 27MHZ
R45
10K
C64
0.1uF
RP3 82
3 6
2 7
1 8
4 5
L7
FB
D1
IN5819
12
C25
4.7uF/16V
R46 51K
C28
0.1uF
R16
1K
JP3
1
2
JP4
0.8-20PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
R35
10K
C71
0.1uF
L12 5.4uH
+C26
105
+C38
47uF/6.3V
R3
10K
L4
2.7uH
C84
22uF/16V
R6
75
C66
0.1uF
R47
10K
C1
47nF
C57
0.1uF
C63
0.1uF
R15
4.7K
12
+
C34
10uF/10V
C50
0.1uF
JP2
1
2
R21
10K R25
1M
C21
0.1uF
+
C94
4.7uF/25V
R8
1K
R4
4.7K
C3
0.1uF
C93
0.1u
U5
3414
1
2
3
4 5
6
7
8
A OUT
A- IN
A+ IN
GND B+ IN
B- IN
B OUT
V+
D7
BAT54S
3
2
1
C78
0.1uF
+
C8
10uF/10V
C55 1uF
C31
0.1uF
C59 1uF
R24
430
+C35
47uF/6.3V
C54 1uF
C92
470p
R1
75
C11
390pF
L11
10uH
C40
0.1uF
C65
0.1uF
C33
1uF
R12 R
R41
20K
+
C60
47uF/6.3V
C13
0.1uF
C70
1uF
+
C44
10uF/10V
+
C90
10uF/16V
C15
47nF
C85
0.1u
C62
0.1uF
C36
0.1uF
C88
273
C69
0.1uF
+C9
10uF/10V
R23
39K
C6
330pF
D3
10V
C86
22uF/16V
C41
0.1uF
C75
0.1uF
C20
22P
L8
10uHL10
10uH
C67
0.1uFR33
1M
R42 10K
R7
1K
U1
TERAWINS T100
6
5
4
14
13
12
22
21
20
3
19
11
29
30
81
82
83
84
85
86
87
88
90
92
93
36
28
31
34
32
33
38
39
40
41
42
43
44
45
49
50
52
53
54
62
65
68
71
72
73
74
99
100
97
98
2 8 10
16 18 24 25 37 48 51 55 58 79 94 59 61 64 67 70 76
1 7 9 15
17 23 63 66 69 75 26 47 56 80 46 57 78 96
95
27
35 60 77 89 91
AC0/ACB0
AC1/ACB1
AC2/ACB2
CVBS0/AY0
CVBS1/AY1
CVBS2/AY2
CVBS3/ACR0
CVBS4/ACR1
CVBS5/ACR2
CBMID
CRMID
CGMID
IICA3/SDA
SCANB/SCL
VDT0
VDT1
VDT2
VDT3
VDT4
VDT5
VDT6
VDT7
VCLK
XTALI
XTALO
XCLK2MC
RSTB
CPUINT/SCANST
PWM
VBIVALID/XbusRD FIELD/XbusWR
RL
UD
STV1
STV2
GOE
GCLK
LP/OEH
POL/VCOM/HSO
STH1/HSO
STH2/DE
CPH1/LLCK1
CPH2/LLCK2
CPH3/LLCK3
IOB
IOG
IOR
RSET
COMP
VREFIN
VREFOUT
FIB1
VREF
NC1 NC2 AGNDB AGNDB AGNDG AGNDG AGNDR AGNDR GND GND GND GND GND GND GND GND AVSSD DVSS AVSS33B AVSS33G AVSS33R AVSS
AVDDB AVDDB
AVDDG AVDDG
AVDDR AVDDR
AVDD33B
AVDD33G
AVDD33R
AVDD
VDD33 VDD33 VDD33
VD33
VDD25 VDD25 VDD25
DPLLVC25
DPLLGND
VDD25 VDD33
DVDD
AVDD33
VDD25
VD33
D2
17V
R28
100
RP1 82
4 5
3 6
2 7
1 8
C74
0.1uF
R18
430
+C32
47uF/6.3V
+
C72
10uF/10V
Q3
2N3904
1
32
R5
4.7K
C5
680pF
D5
BAT54S
3
2
1
R44
20K
C52
0.1uF
U4
AAT1102
1
2
3
4 5
6
7
8
EO
IN
SHDN
GND SW
VDD
FREQ
SS
R36
100
+
C73
47uF/6.3V
U2
CM1117SCM223 2.5V
3 2
1
OUT IN
GND
R30
510
C58 1uF
C43
1uF
R13 R
C56
0.1uF
RP2 82
4 5
3 6
2 7
1 8
JP1
CON26
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
AVSS
AVDD
VC
VB
VA
DVSS
DVDD
CPH1
CPH2
CPH3
STHR
STHL
OEH
Q1H
LR
VCOM
VCOM
OEV
U/D
CKV
STVL
STVR
VGH
VGL
VCC
GND
C91
18p
R10 33
12
R27
10K
R38 2K
C29
0.1uF
+
C39
22uF/16V
R40
10K
C12
560pF
Q2
2N3904
1
23
C79
100pF
R2 20K
R37 8.2K
+
C47
47uF/6.3V
R26
150
C45
4.7uF/25V
D6
BAT54S
3
2
1
C48
0.1uF
+
C22
22uF/16V
R39
150R(10K)
U6
MP1540
5 1
4
2
3
IN
SW
EN
GND
FB
U3 78L05
2
13
GND
VOUTVIN
L2
2.7uH
+C30
47uF/6.3V
Q1
2N3904
1
32
R32
430
C82
0.1uF
R19
1M
R34
150
+C7
47uF/10V
VR1
10K
1 3
2
L6 FB100
C68
0.1uF
C14
0.1uF
C17
330pF
C87
10uF/16V
D8
5819
1 2
C81
47uF/10V
C77
0.1uF
C23
0.1uF
R9
75
R17
39K
+
C4
100uF/6.3V
C37
0.1uF
R20
150
L1 FB
C76
0.1uF
C83
22uF/16V
C61
0.1uF
L3
2.7uH
L9 10uH
C80
0.1uF
C42
100pF
C19
22PF
C24
4.7uF/16V
C46
4.7uF/25V
L5 2.7uH
C49
0.1uF
C18
22PF
C10
47nF
A
1
2
3
4
5
6
7
8
9
10
11
12
B C D E F G H I J K L M N O P Q R ST

3-9 3-10
LCD PRINTED CIRCUIT DIAGRAMS
1. MAIN P.C. BOARD (TOP VIEW)
( TOP VIEW ) ( BOTTOM VIEW )

3-11
MAIN ELECTRICAL TROUBLE SHOOTING GUIDE
1. Power (DC-DC Converter) Circuit
NO POWER ON
by ADAPTOR
Replace ADAPTOR
Is ADAPTOR OUT
9.5V.
A
Is1D3 OK.
NO
NO Replace 1D3
NO
NO
YES
YES
YES
NO POWER ON by
BATTERY
Replace BATTERYIs BATTERY OK?
A
NO
YES
YES
A
YES
NO +3.3VNO +1.8V
Is IC(1U2)
3.3v OK? Replace IC(1U2).
Is 1Q3 3.3V
OK? Replace IC(1Q3).
NO LCD
POWER
NO +5V
Replace
IC(1U1) Replace7L1
MAIN PART

B. AUDIO OUT ABNORMAL C.VIDEO OUT ABNORMAL
D. AUDIO IN/SPEAKER ABNORMAL E. VIDEO IN ABNORMAL
AUDIO OUT
ABNORMAL
Check Audio Jack &
Mode
Check Signals from
MPEG
Check +9V
YES
YES
YES
YES
Replace IC(4U3)
VIDEO OUT
ABNORMAL
Check Video Jack &
Mode
Check IC(8U1)
Check Video signals
from MPEG
YES
YES
YES
Check LC Filter
YES
AUDIO IN/SPEAK-
ER ABNORMAL
Check Audio Jack &
Mode S/W
Is Speakers OK
.Replace
Is 7J2 OK . Replace 7J2
Speakers
Replace IC(5U1)
VIDEO IN
ABNORMAL
Check Video Jack
& Mode
Check 7J2
Is 8Q1 OK . Replace 8Q1
Refer to LCD part
3-12