LG 32LG80UR (CHASSIS:LP81G) Service Manual ▷ View online
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7. Unusual display from component 1 mode
Yes
Is video
input of the Com1
Jack normal? (Check
R8011/12/13)
Check the input source.
Change IC801.
No
8. Unusual display from component 2 model
Yes
Is video
input of the Com2
Jack normal? (Check
R8030/32/33)
Check the input source.
Change IC801.
No
9. Unusual display from RGB model
Yes
Is video
input of the Com2
Jack normal? (Check
R8035/37/39)
Check the input source.
Change IC801.
No
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Set on speaker
in menu.
in menu.
Download the EDID data..
Check the signal after
IC600 refer to circuit
diagram.
IC600 refer to circuit
diagram.
No
No
No
Check the Tuner In/Out.
No
No
Check the Speaker
cable.
cable.
No
Replace IC600.
No
Replace IC801.
No
Yes
Yes
All input(mode)
is no sound.
Only HDMI is
no sound.
Is the speaker
cable normal?
cable normal?
Is the speaker
on it menu?
Yes
Only AV/COM2/PC
input is no sound.
Is the output of
IC600 normal?
IC600 normal?
Yes
Yes
Only RF is no sound.
Yes
Is IC801 operated
normality?
Yes
Replace IC601.
Replace Main B/D.
No
Is IC601/IC603
operatednormality?
Yes
10. 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 process
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AV1 in
SideAV
in
(AV2 in)
Comp1 in
Comp2 in
RGB in
(D/L)
AV out
CVBS IN
Y
/P
b
/Pr IN
R/G/B/HS/VS IN
CVBS IN
LINE OUT
LINE IN
LINE_MUTE
RS-232C
Rx/T
x
MX3232
RF
(Tuner)
PC Audio
in
DISPLAY MODULE
EDID NVM
HDMI1
HDMI2
USB
DDR MEM
SERIAL
FLASH
NTP3000A
Digital
Audio AMP
MAIN NVM
MC74HC4066
Audio SW
LM324
X4 AMP
BD2041
Protect IC
EDID NVM
DDC/HDP/CEC
TMDS(HDMI in)
DDC/HPD/CEC
TMDS(HDMI in)
USB(AV I/O, Data I/O)
+5V
PART_I2C
SW_RESET
I2S OUT
LVDS
MPEG RX/TX
MPEG RESET
I2S IN
656 IN
DDC
DDC
UART_Rx/Tx
AUDIO_SW
LINE IN
LINE IN
LINE IN
Y
/P
b
/Pr IN
LINE IN
Y/C IN
LINE IN
EDID NVM
ROM_I2C
DSUB_DDC
x0.55
x0.55
x0.55
x0.55
S_VIDEO_DET
LINE_MUTE
LINE OUT
CVBS OUT
x4
x0.55
LINE IN
CVBS IN
SIF IN
TUNER_I2C
PART_I2C
NTP3000A
Digital
Audio AMP
Mid
Center
Mid
Woofer
3
2
°Ø
: 2EA
4
2
°±
: 1EA
LGE6891DD
LGE6991DD
Motor
Motor
OP Amp
OP Amp
Limit S/W
4lines
2Lines
Zoran
VADDIS-966XD
MPEG Decoder
DDR
MEM
SERIAL
FLASH
BLOCK DIAGRAM
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300
122
123
200200
510
511
500
125
806
802
804
801
530
803
821
540
521
121
120
900
910
550
805
400
420
430
410
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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