LG 42PG20D-AA (CHASSIS:PA81A) Service Manual ▷ View online
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(5) In the case of becomes unusual display from Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
(7) In the case of becomes unusual display from component mode
Is the R,G,B input and H,V
Sync of the JK104 normal?
Check the input source
No
Is the HDMI(IC201)
normal?
Yes
Same as Block A
Is the TMDS waveform between the
IC and HDMI jacks normal?
No
Is the Video input of
component jack normal?
Yes
Same as Block A
Check the input source
No
Replace the IC201.
No
Yes
Same as Block A
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6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display but sound is not output.
2) Screen display but sound is not output.
(2) Check following
All input(mode) is no
sound?
Only HDMI is No
Sound?
Yes
Download
the EDID data
Yes
No
YES
Only RF is no sound?
Check
the Tuner’s IN/OUTPUT
Yes
No
Is the IC602 normal?
Replace the IC602
(MSP4458)
No
Is the IC601 normal?
Replace the IC601
(NTP-3000A)
No
YES
Replace the VSC Board
YES
Is the speakers turned
on(OSD menu)?
Set on the speakers on
menu.
No
Is the speaker Cable
connect?
Connect the Speaker
Cable.
No
Yes
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BLOCK DIAGRAM
COMP1
RGB
HDMI1,
HDMI2,
HDMI3
AV1
AV2
(Side)
CVBS, Y/C
DDR2 SDRAM
(64MByte)
Qimonda
IC701
NOR Flash
(32MB)
SPANSION
IC404
WXGA
Panel
SPDIF
USB
SPDIF_OUT
Digital amp
(NTP3000A)
IC601
RS-232C
TMDS351PAG
IC201
Y
Pb
Pr, L/R
DTV/MNT OUT
I2S
EEPROM
24LC512
IC907
HDMI4
RGB
TMDS[0:7]
TMDS[0:7]
CVBS, SIF
NLASB3157
IC502
LVDS TMDS ODD[10 bit]
Host Address[0:24]
Host Data[0:15]
LPF
DDR2 Data[0:15]
DDR2 SDRAM
(64MByte)
Qimonda
IC701
DDR2 Data[16:31]
DDR2 Address[0:12]
I2C
MICOM
WT61P8
IC802
I2C
MAX3232CDR
IC101
TX/RX
TX
NLASB3157
IC1013
TX
TX
AT24C16AN
IC801
FLI10306
TS[0], CLK, SY, VAL (Serial)
Module I2C
RX
CVBS, Y/C
Monitor
out
TV,AV
DTV
Tuner
(TDFV-G135D1)
TU301
COMP2
Y
Pb
Pr, L/R
MSP
IC602
I2S
L,R
L,R
SW_LR
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BlockDiagram
(Reset)
KIA7029AF
Power On Reset
IC803
MICOM Reset
[NRST]
S29GL256N10TFI020
NOR Flash
IC404
RESET
EJTAG RESET
[EJ_RST_N]
SYS RESET
[RESET_N]
Tic S/W
NTP3000
SW_RESET
[VXO_D5]
TUNER
FE_RESET
[VXI_D14]
FLI10306
MICOM
[GPIOE6]
MSP4458G
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