LG 32LG10R (CHASSIS:LP81A) Service Manual ▷ View online
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8. DDC command protocol
8-1. Signal TABLE
8-2. E2PROM Data Write
(1) Signal TABLE
LEN
: 84h+Bytes
CMD : E8h
ADH : E2PROM Slave Address (A0,A2,A4,A6), Not 00h
ADH : E2PROM Slave Address (A0,A2,A4,A6), Not 00h
(Reserved by BufferToEEPROM)
ADL
: E2PROM Sub Address(00~FF)
Data : Write data
Delay : 20ms
Delay : 20ms
(2) Command Set
* Purpose
1) EDID write : 16-byte by 16-byte, 8 order (128-byte)
write(TO “00 – 7F” of “EEPROM Page A4”).
2) FOS Default write : 14-mode data write
(SyncFlags, HPeriodH, HPeriodL, VtotalH, VtotalL,
SrcHTotalH, SrcHTotalL, SrcHStartH, SrcHStartL,
SrcVStartH, SrcVStartL, HsyncPhase).
SrcHTotalH, SrcHTotalL, SrcHStartH, SrcHStartL,
SrcVStartH, SrcVStartL, HsyncPhase).
3) Random Data write : write the appointment Address of
E2PROM.
(3) E2PROM Data Read
1) Signal TABLE
2) COMMAND SET
* Purpose : To read(84h) the appointment Address of E2PROM
by 128(80h)-byte
Delay 20m
VAL
128 Bytes
Delay 150ms
EEPROM WRITE
E8h
94
16-Byte Write
(84+n)h
n-byte Write
Adjustment contents
CMD(hex)
LEN
Details
EEPROM READ
E7
A0
0
0-Page 0~7F Read
80
0-Page 80~FF Read
A2
0
1-Page 0~7F Read
80
1-Page 80~FF Read
A4
0
2-Page 0~7F Read
80
2-Page 80~FF Read
A6
0
3-Page 0~7F Read
80
3-Page 80~FF Read
Adjustment contents CMD(hex) ADH(hex) ADL(hex)
Details
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TROUBLESHOOTING
1. No power
(1) Symptom
1) It is not discharged minutely from module.
2) Light does not come into the front LED.
2) Light does not come into the front LED.
(2) Check process
Plug in the power cord.
No
Yes
Is the power cord
plugged in?
plugged in?
Connect the cable.(SC100)
No
Yes
Are the line filter and
PSU connected?
PSU connected?
Replace the fuse.
No
Yes
Is the fuse of PSU
normal? (F101)
Connect a cable P1100.
After all cables connect is removed to PSU, the
AC voltage marking is authorized on manual.
When ST-BY 5V is not operated. replace PSU.
AC voltage marking is authorized on manual.
When ST-BY 5V is not operated. replace PSU.
No
Yes
Is it connected
that PSU and P1100
in Main B/D?
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2. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
2) It maintains the condition where the front LED is green.
(2) Check process
3. Unusual display from RF mode
Check the LCD Module
Replace the
Power board.
Power board.
Does
minute discharge
at Module?
Is the inverter
/ VaVs on?
Is output the normality
Low/High voltage except
Stand-by 5V?
Low/High voltage except
Stand-by 5V?
Yes
No
No
Is the link cable
normal?
Yes
Is the IC801’s
output normal?
Reconnect Panel line cable.
(HD : P403, FHD : P402)
(HD : P403, FHD : P402)
No
Replace the VSC.
No
Yes
Check the power.
Is
video output of the
Tuner normal? (Check
TU500_Pin13)
Is the
input voltage
normal?(Check
Pin3)
Is the I2C communication normal?
(Check Pin9, Pin10)
(Check Pin9, Pin10)
Yes
No
Yes
Is the LVDS
Cable connected?
well
Yes
Change the IC(IC801)
Cable inserts well.
No
No
Check the Tuner.
No
Block A
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4. Unusual display from rear AV mode.
Yes
Is video input of
the A/V Jack normal?
(Check R8044)
Check the input source.
Same as Block A.
No
5. Unusual display from Side AV model.
Yes
Is video input of
the Side A/V Jack normal?
(Check R8043)
Check the input source.
Same as Block A.
No
6. Unusual display from Side S-Video mode.
Yes
Is video input of
the S-Video Jack normal?
(Check R8041/42)
Check the input source.
Same as Block A.
No
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