LG DP450G User manual
PORTABLE DVD
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Website http://biz.lgservice.com
Internal Use Only
P/NO : AFN73065026 MARCH, 2009
MODEL : DP450G
MODEL : DP450G
SERVICE MANUAL
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
• GENERAL SERVICING PRECAUTIONS
• INSULATION CHECKING PRODEDURE
• ELECTROSTATICALLY SENSITIVE (ES) DEVICES
SPECIFICATIONS ....................................................................................................................................... 1-5
1-3
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original design
be modied or altered without permission from LG Corporation. All components
should be replaced only with types identical to those in the original circuit and
their physical location, wiring and lead dress must conform to original layout
upon completion of repairs.
Special components are also used to prevent x-radiation, shock and re haz-
ard.These components are indicated by the letter “x” included in their compo-
nent designators and are required to maintain safe performance. No deviations
are allowedwithout prior approval by LG Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into
the set are not delayed until the new service literature is printed.
CAUTION: Do not attempt to modify this product in any way. Never perform-
customized installations without manufacturer’s approval. Unauthorized mod
cations will not only void the warranty, but may lead to property damage or
user injury.
Service work should be performed only after you are thoroughly familiar with
these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended to
alert the service personnel to important safety information in the
service literature.
The lightning ash with arrowhead symbol within an equilateral
triangle is intended to alert the service personnel to the presence
of noninsulated “dangerous voltage” that may be of sufcient
magnitude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equi-
lateral triangle is intended to convey to the service personnel the
following fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ALLFUSES WITH THE SAME TYPE AND
RATING AS MARKED NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock.
After the original service problem has been corrected, make a check of the
following:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of adjacent
component shorts. This is especially important on items trans-ported to and
from the repair shop.
2. Verify that all protective devices such as insulators, barriers, covers,
shields, strain reliefs, power supply cords, and other hardware have been
reinstalled per the 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 co
ponents, for frayed leads or damaged insulation (including the AC cord),
and replace if necessary.
5. No lead or component should touch a high current device or a resistor rated
at 1 watt or more. Lead tension around protruding metal surfaces must be
avoided.
6. posed metallic parts of the cabinet (the channel selector knobs, antenna
terminals, handle and screws) to be sure that set is safe to operate without
danger of electrical shock.
DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST.
Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the
following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a
.15 mfd 150V AC type capacitor between a known good earth ground water
pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure
the AC voltage across the combination of 1500 ohm resistor and .15 mfd
capacitor. Reverse the AC plug by using a non-polarized adaptor and re-
peat AC voltage measurements for each exposed metallic part. Voltage
measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milli-
amp AC. Any value exceeding this limit constitutes a potential shock hazard
and must be corrected immediately.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely tting
shelf space over, or close to, a heat duct, or in the path of heated air ow.
2. Avoid conditions of high humidity such as: outdoor patio installations where
dew is a factor, near steam radiators where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct venting. The customer
should also avoid the use of decorative scarves or other coverings that
might obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial 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 ow across the bottom. Bolts or screws
used for fasteers must not touch any parts or wiring. Perform leakage tests
on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a
tilted position, unless the receiver is properly secured.
6. Aproduct on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small cast-
ers across thresholds or deep pile carpets.
7. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous conse-
quences to home and family.
GOOD EARTH
GROUND SUCH AS
THE WATER PIPE.
CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
A.C. VOLTMETER
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 conict between the following
servicing precautions and any of the safety precautions in
this publication, always follow the safety precautions.
Remember 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 electro-
lytic capacitor.
Caution : A wrong part substitution or incorrect polar-
ity 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 specied 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
specied 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 ap-
propriate 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 re-
sistance between each blade of the attachment plug and
accessible conductive parts (Note 1) should be more than
1Mohm.
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 eld
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 com-
mercially 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 unsol-
der ES devices.
4. Use only an anti-static solder removal device. Some sol-
der removal devices not classied a “anti-static” can gen-
erate electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can gener-
ate electrical charge sufcient to damage ES devices.
6. Do not remove a replacement ES device from its protec
tive package until immediately before you are ready to in-
stall 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 protec-
tive 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 lift-
ing of your foot from a carpeted oor can generate static
electricity sufcient to damage an ES device.)
1-5
• General
Power requirements DC 12V
Power consumption 12W
External Dimensions 202 x 39 x 164mm (W x H x D)
Net Weight (Approx.) 0.85kg
Operating temperature 5°C to 40°C
Operating humidity 5% to 90%
Laser Semiconductor laser
Signal system PAL
• ConneCtors
Audio/Video Output ø3.5mm mini jack x 1
- Video: 1.0V (p-p), 75Ω, sync negative
- Audio: 1.5Vrms (1kHz, 0dB)
Earphone terminal ø3.5mm stereo mini jack x 1
• liquid Crystal display
Panel size 7 inches wide (diagonal)
Projection system R.G.B. stripe
Driving system TFT active matrix
Resolution 480 x 234 (WQVGA)
SPECIFICATIONS
1-6
2-1
EXPLODED VIEWS......................................................................................................................................2-2
1. CABINET AND MAIN FRAME SECTION...................................................................................................2-2
2. PACKING ACCESSORY SECTION...........................................................................................................2-3
SECTION 2
EXPLODED VIEWS
CONTENTS
2-2
256
G
A45
A41
KEY
BORAD
CABLE4
262
261
265
258
259
260
476
257
263
264
473
267
266
268
476
A48
BA
LCD
BOARD
277
277
476
476
A51
A40
A52
LCD PANEL
CABLE2
CABLE1
250
252
475
477
475
477
254
254
253
251
476
E
D
C
269
270
F
809
476
CABLE3
A00
269
A46
MAIN
BOARD
ECA
D
B
F
G
474
271
273
272
273
474
275
273
474
A44
274
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
2-3
2. PACKING ACCESSORY SECTION
PLUG ASS'Y(RCA CABLE)
806
834
POWER CORD
300
SET BOX
802
ACC BOX
802A
808 BATTER
Y
801 OWNER'S MANUAL
CABLE, CIGAR JACK
804 PACKING SHEET
803 PACKING
REMOTE CONTROL
900
839 CARRING CASE
2-4
3-1
LCD PART.......................................................................................................................................................3-2
LCD ELECTRICAL TROUBLESHOOTING GUIDE ...........................................................................3-2
BLOCK DIAGRAM .......................................................................................................................................3-3
CIRCUIT DIAGRAM .....................................................................................................................................3-5
PRINTED CIRCUIT BOARD DIAGRAM................................................................................................3-7
MAIN PART...................................................................................................................................................3-11
MAIN ELECTRICAL TROUBLESHOOTING GUIDE.......................................................................3-11
1. POWER (DC-DC CONVERTER CIRCUIT)............................................................................................3-11
2. MPEG CIRCUIT .....................................................................................................................................3-14
3. RF/SERVO CIRCUIT .............................................................................................................................3-15
4. CHARGING CIRCUIT ............................................................................................................................3-18
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ..................................3-19
1. SYSTEM 27MHz CLOCK.......................................................................................................................3-19
2. SDRAM CLOCK .....................................................................................................................................3-19
3. MT1389 VIDEO OUTPUT WAVEFORM ................................................................................................3-20
4. AUDIO OUTPUT FROM AUDIO DAC....................................................................................................3-20
BLOCK DIAGRAMS ..................................................................................................................................3-21
1. OVERALL BLOCK DIAGRAM................................................................................................................3-21
2. POWER BLOCK DIAGRAM...................................................................................................................3-22
3. SERVO BLOCK DIAGRAM....................................................................................................................3-23
4. SYSTEM BLOCK DIAGRAM..................................................................................................................3-24
5. A/V BLOCK DIAGRAM...........................................................................................................................3-25
CIRCUIT DIAGRAMS ................................................................................................................................3-27
1. MPEG CIRCUIT DIAGRAM ...................................................................................................................3-27
2. MEMORY CIRCUIT DIAGRAM..............................................................................................................3-29
3. OPU & MOTOR CIRCUIT DIAGRAM ...................................................................................................3-31
4. AV CIRCUIT DIAGRAM .........................................................................................................................3-33
5. CHARGE CIRCUIT DIAGRAM...............................................................................................................3-35
6. LCD I/F CIRCUIT DIAGRAM..................................................................................................................3-37
7. KEY CIRCUIT DIAGRAM.......................................................................................................................3-39
• CirCuit VoltaGe CHart................................................................................................................3-41
PRINTED CIRCUIT BOARD DIAGRAMS ...........................................................................................3-45
1. MAIN P.C.BOARD..................................................................................................................................3-45
2. KEY P.C.BOARD ...................................................................................................................................3-49
SECTION 3
ELECTRICAL
CONTENTS
3-2
LCD PART
LCD ELECTRICAL TROUBLESHOOTING GUIDE
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Appear shadow form
interference in black background
Display condition?
Fuse normal?
+7.5V, 15V, -10V
+5V normal?
R G B signal output?
VCOM signal?
(Vip 4.5)
LCD MODE
CONT signal? All “LOW” (Normal
condition)
TFT LCD
pressure voltage? +3.3V, +5V,
+15V, -10V
TFT LCD normal?
Color
adjusting normal?
Each connector?
END Replace
Replace and Reassemble
Readjust as adjustement standard
Replace
Power source and
L909, L1, D1, D2 check
MAIN B/D Check
IC(U1) Check and Replace
Check and Replace
MPEG1389LP (Pin107, 108, 109)
IC(U2) Check and Replace
D6, D1, D2
Fuse Replace
Inverter abnormal
3-43-3
BLOCK DIAGRAM
¥STVR
¥STVL
¥CKV
¥UND
¥OEV
¥VCOMO
¥OEH
¥STHL
¥CPH1
¥89P_R
¥89P_G
¥89P_B
¥SP L-
¥SP L+
¥SP R-
¥SP R+
¥3.3V
¥5VA
¥VIN_6-12V
¥PWRCTL_LCD
¥IR
¥AD_K
¥DVD_KEY1
¥DVD_KEY2
¥DVD_KEY3
¥VCOM
¥UTC3308 IC
Connector
(Main interface)
VCOM BLOCK
LCD POWER BLOCK
R/G/B Circuit
BLOCK
LCD PANEL
SPEAK
KEY
INVERTER POWER BLOCK
BACKLIGHT
KEYPAD BLOCK
IR
AD_K
DVD_KEY1
DVD_KEY2
DVD_KEY3
¥ROUT
¥GOUT
¥BOUT
¥VIN_6-12V
¥PWRCTL_LCD
¥MP2359 IC
¥VGH (+15V)
¥VGL (-10V)
¥7.5V
¥5V
¥VGH
¥VGL
¥STVR
¥STVL
¥CKV
¥UND
¥OEV
¥VCOMO
¥LNR
¥MOD
¥OEH
¥STHL
¥STHR
¥CPH3
¥CPH2
¥CPH1
¥89P_R
¥89P_G
¥89P_B
¥SP L-
¥SP L+
¥SP R-
¥SP R+
¥RCR2561 IC
Saturday, September 13, 2008
ROUT
BOUT
ROUT
BOUT
GOUT
STHR
OEH
STHL
OEV
UND
CKV
STVL
STVR
CPH1
LNR
+15V
+7.5V
89L_B
R_IN
89L_G
B_IN
G_IN
89L_R
-10V
BIAS
89L_G
89L_B
89L_R
5VD
5VD
7VD5
VCOMO
+7.5V
-10V
VCOMVCOM
SP_L-
SP_R+
SP_R-
SP_L+
R_IN
G_IN
GOUT
B_IN
5VD
UND
5VD
LNR
SP_L-
SP_R+
SP_R-
SP_L+
LED_5V
LED_12V
LED_GND
LED_5V
LED_GND
GND
SP_L+
SP_L-
SP_R+
SP_R-
GND
CPH1
STHL
STVL
CKV
OEV
OEH
VCOMO
GND
LCD_3.3V
LCD_5V
LED_12V
LCD_5V
5VD
LCD_3.3V
BIAS
BIAS
7VD5
7VD5
BIAS7VD5
Vdc
Vdc
Vdc
GND
CPH3
STHR
STHL
CKV
U/D
CPH1
VCOM
VCOM
OEV
VGL
VR
GND
VCC
VCC
L/R
VGH
VG
STVR
MOD
VB
AVSS
AVDD
CPH2
OEH
STVL
89P VCOM DAC OUTPUT
Spec Sheet No.
DC TO DC
RCR2561
10
4
16
14
19
11
6
20
15
13
12
17
2
23
5
3
22
18
9
8
7
24
1
21
25
26
CPT CLAA070WA03
InnoLux AT070TN04
AUO A070FW03
Elite Star LR070WA01B
PVI PW070XU3
CN1
CON26_0.5MM
CN1
CON26_0.5MM
10
9
8
7
6
5
4
3
2
1
11
13
12
15
14
16
20
19
18
17
24
23
22
21
26
25
27
28
TP917TP917
C16
104
C16
104
C965104 C965104
C6 4.7uF/25 VC6 4.7uF/25 V
R29
100/75
R29
100/75
R25
39K
R25
39K
C19
22uF/16V
C19
22uF/16V
L4
1.8uH
L4
1.8uH
R944
10K
R944
10K
C966104 C966104
L908LSS57S30-330(33uH)L908LSS57S30-330(33uH)
R5
10K
R5
10K
C967104 C967104
C960
2.2uF/25V X5R
C960
2.2uF/25V X5R
C25
105
C25
105
C8
4.7uF/25V
C8
4.7uF/25V
U3
RCR2561
U3
RCR2561
IN 5
SW 1
EN
4
GND
2
FB 3
R30
100
R30
100
C962104 C962104
C36
(NC)104
C36
(NC)104
C23
104
C23
104
R953
NC
R953
NC
D2
D_10V
D2
D_10V
1 2
C48
100pF
C48
100pF
R35NCR35NC
R18
20K
R18
20K
R949
10K
R949
10K
TP3TP3
C37 105C37 105
L7
1.8uH
L7
1.8uH
C14
104
C14
104
L909
10uH
L909
10uH
VR2
2K
VR2
2K
1
2
3
R19
51K
R19
51K
R31
0R
R31
0R
B
C
E
Q1
SMBT3904
B
C
E
Q1
SMBT3904
1
3 2
R950
5.6K
R950
5.6K
C5 10uF/16VC5 10uF/16V
C49
100pF
C49
100pF
TP4TP4
R9
150R
R9
150R
C17
105
C17
105
R22
100/75
R22
100/75
C31
100pF
C31
100pF
R3
10K
R3
10K R4
68K
R4
68K
R28
10K
R28
10K
C58
102pF
C58
102pF
C38 10uF/16VC38 10uF/16V
C35
10uF/16V
C35
10uF/16V
R960 0603-600
R960 0603-600
TP2TP2
R946
10K
R946
10K
TP915TP915
R7
10K
R7
10K
L2 6.8uHL2 6.8uH
R959 0603-600
R959 0603-600
B
C
E
Q3
SMBT3904
B
C
E
Q3
SMBT3904
1
3 2
C955
103
C955
103
R8
330R
R8
330R
TP916TP916
C24 105C24 105
C47
100pF
C47
100pF
R23
100
R23
100
CN2
CON12_1.0MM
CN2
CON12_1.0MM
10
9
8
7
6
5
4
3
2
1
11
12
13
14
R96450R96450
R96550R96550
U1
UTC3308
U1
UTC3308
A OUT
1
A- IN
2
A+ IN
3
GND
4B+ IN 5
B- IN 6
B OUT 7
V+ 8
C56
102pF
C56
102pF
CN3
CON10_1.0MM
CN3
CON10_1.0MM
10
9
8
7
6
5
4
3
2
1
11
12
C9 105C9 105
TP1TP1
R96350R96350
R947
270K
R947
270K
R16
430/270
R16
430/270
D1
D_15V
D1
D_15V
1 2
L5 4.7uHL5 4.7uH
C2
10uF/16V
C2
10uF/16V
R945
100K
R945
100K
C39
100pF
C39
100pF
C11 105C11 105
R27
47K
R27
47K
R17
47K
R17
47K
TP7TP7
R952
12 1%
R952
12 1%
TP914TP914
B
C
E
Q2
SMBT3904
B
C
E
Q2
SMBT3904
1
3 2
+
C20
47uF/10V
+
C20
47uF/10V
12
TP8TP8
C7 4.7uF/25VC7 4.7uF/25V
R21
10K
R21
10K
R41
10K
R41
10K
TP912TP912
C21
22uF/16V
C21
22uF/16V
R42
100/75
R42
100/75
C30
22uF/10V
C30
22uF/10V
TP9TP9
L1 4.7uHL1 4.7uH
R962 0603-600
R962 0603-600
R956 0603-600
R956 0603-600
C961
104
C961
104
U2
78L05
U2
78L05
GND
2
IN
3OUT 1
D6
1N5819
D6
1N5819
1 2
B
C
E
Q905
SMBT3904
B
C
E
Q905
SMBT3904
1
3 2
R37
39k
R37
39k
TP10TP10
C1
10uF/16V
C1
10uF/16V
R14
10K
R14
10K
R26
430/270
R26
430/270
TP913TP913
C57
102pF
C57
102pF
C28
104
C28
104
+
C43
47uF/10V
+
C43
47uF/10V
12
C10
104
C10
104
R100R100
C45 10uF/16VC45 10uF/16V
C22
22uF/16V
C22
22uF/16V
L6
1.8uH
L6
1.8uH
D907
IN5819
D907
IN5819
1 2
R20
10K
R20
10K
R38
430/270
R38
430/270
R36
0
R36
0
C18
104
C18
104
R951
68K
R951
68K
C4 10uF/16VC4 10uF/16V
R941
0R
R941
0R
C29
104
C29
104
D3
BAT54S
D3
BAT54S
3
2
1
R24
10K
R24
10K
R6
20K
R6
20K
C12 105
C12 105
R33
0R
R33
0R
C957
104
C957
104
C40
100pF
C40
100pF
C32
100pF
C32
100pF
B
C
E
Q904
SMBT3906
B
C
E
Q904
SMBT3906
2 3
1
R32
Value
R32
Value
C27
104
C27
104
R948
1K
R948
1K
R15
39k
R15
39k
D4
BAT54S
D4
BAT54S
3
2
1
C34
104
C34
104
C42 105C42 105
R2 2KR2 2K
R34
NC
R34
NC
R958 0603-600
R958 0603-600
R44NCR44NC
C41
100pF
C41
100pF
R43
100
R43
100
R957 0603-600
R957 0603-600
C33
100pF
C33
100pF
R1
3.16K
R1
3.16K
CN904
3.5-2P
CN904
3.5-2P
1
1
2
233
44
C959
334
C959
334
R39
47K
R39
47K
U904
MP2359DT
U904
MP2359DT
IN
5
EN
4
GND
2
BST 1
FB 3
SW 6
C963104 C963104
R110R110
C26 10uF/16VC26 10uF/16V
R961 0603-600
R961 0603-600
C3
104
C3
104
C15
104
C15
104
C964104 C964104
C13
104
C13
104
D908
D_13V
D908
D_13V
1 2
TP911TP911
D5
BAT54S
D5
BAT54S
3
2
1
C958
2.2uF/25V X5R
C958
2.2uF/25V X5R
C59
102pF
C59
102pF
CIRCUIT DIAGRAM
3-63-5
PRINTED CIRCUIT BOARD DIAGRAMS
( TOP VIEW )
3-7 3-8
( BOTTOM VIEW )
3-9 3-10
3-11
MAIN PART
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER (DC-DC CONVERTER CIRCUIT)
A. NO POWER ON BY ADAPTOR B. NO POWER ON BY BATTERY
NO NO
NO
NO NO NO
NO NO
YES
YES
YES
YES YES
Is ADAPTOR
out 12V?
Is D606 OK?
Is BATTERY OK?
Replace ADAPTOR
Replace D606
No +12V
Replace U401
Is U202 1.8V OK?
Replace U202 Replace U202
Is Q402 5V OK?
Replace U401 Replace U401
Is U401
3.3V OK?
VCOM signal?
(Vip 4.5)
Is U401
5V OK?
Is U401
5V OK?
No LCD_3.3V
No S3.3V
No A+5V
No M5V
VCC_5V
No 5VA
Replace BATTERY
No power on
by ADAPTOR
No power on
by BATTERY
3-12
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
F. DISC ERROR
Disc error
Check Disc
Refer to SERVO part
Replace B/D
YES
YES
YES
C. AUDIO OUT ABNORMAL
Audio out abnormal
Check Audio jack & mode
Check A+5V
Check signals from MPEG
Replace IC(U502)
YES
YES
YES
YES
E. PICTURE ABNORMAL
Picture abnormal
Check the disc.
Refer to SERVO part
Check DCLK signal of MPEG part
Check MPEG (IC U201)
Replace B/D
YES
YES
YES
YES
YES
D. VIDEO OUT ABNORMAL
Video out abnormal
Check Video jack & mode
Check A+5V
Check signals from MPEG
Check IC(U502)
YES
YES
YES
YES
3-13
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
G. OPEN/CLOSE ABNORMAL
OPEN/CLOSE abnormal
Check SW201 switch
Check the connectin of MD.
Refer to SERVO part.
YES
YES
NO
YES YES
Check IC(U201) Pin92
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