DOWNLOAD LG 52LG5FRC-TA (CHASSIS:LP81Z) Service Manual ↓ Size: 3.48 MB | Pages: 34 in PDF or view online for FREE

Model
52LG5FRC-TA (CHASSIS:LP81Z)
Pages
34
Size
3.48 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
52lg5frc-ta-chassis-lp81z.pdf
Date
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LG 52LG5FRC-TA (CHASSIS:LP81Z) Service Manual ▷ View online

C
2008
- 13 -
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
(Reserved by BufferToEEPROM)
ADL
: E2PROM    Sub Address(00~FF)
Data : Write data
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).
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
C
2008
- 14 -
TROUBLESHOOTING
1. Power-Up Boot Fail
Check P1100
Voltage Level (16V, 12V, 5V)
Check Power connector
OK ?
Replace Power board
Y
N
Y
Check IC1100 #6 Pin
Voltage Level 3.3V
Replace IC1100
Recheck
Y
N
Check IC1103 #2 Pin
Voltage Level 1.25V
Replace IC1103
Recheck
Y
N
Check IC802 #8 Pin
Voltage Level 3.3V
Replace IC803
Recheck
Y
N
Check X800 Clock
14.31818MHz
Replace X800
Y
N
Replace IC803 Flash Memory
N
N
N
Check Micom  IC801
Redownload or replace
2. Analog TV Video
Check RF Cable
Check I2C, SDA
TU500 Pin #9
Replace TU500
Check I2C, SCL
TU500 Pin #10
Check V-OUT
TU500 Pin #13
Y
Y
N
Check Tuner 5V Power
C521, C503, L1109
Replace TU500
Y
N
Y
Replace TU500
N
N
Replace TU500
C
2008
- 15 -
3. Component Video
Check signal format
Is it supported?
Check signal
R0830, R8031, R8032, R8033
Replace it.
Y
N
Check JK100
Replace Component Jack (JK100)
Y
N
Y
Maybe LGE6991DD(IC801)
has problems
Y
Check Component Cable
4. RGB Video
Check signal format
Is it supported?
Check signal, Hsync, Vsync
R114, R115
Replace it.
Check signal
R8035, R8037, R8039
Y
N
Check JK104
Replace RGB Jack (JK104)
Y
N
Y
Replace it
N
Y
Check RGB Cable
Y
Maybe LGE6991DD(IC801)
has problems
C
2008
- 16 -
5. AV Video
Check signal format
Is it supported?
Check signal
Rear —
 R8044 (Composite),
Side —
 R8043 (Composite),
R8041, R8042 (S-Video)
Replace it.
Y
N
Check JK200 (Rear)
Check JK204 & JK205 (Side)
Replace JK200, JK204, JK205
Y
N
Y
Check AV Cable / S-Video Cable
Y
Maybe LGE6991DD(IC801)
has problems
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