LG GSA-4163B Service Manual page 74

2. Adjusting Error during Disc Load Sequence (Lead in Error)
No. Error Code
SSB Byte21,22
1 42xx
2 452x
3 450x
451x
454x
4 458x
5 47xx
6 49xx
76
Contents of fail
Circuit Offset Adjust NG.
Focus Amp Adjust NG.
(DVD-DL Only)
Focus Amp Adjust NG.
Total Amp Adjust NG.
Tracking Amp Adjust NG.
Servo Loop Gain Adjust NG.
Unwritten Slice Level Adjust NG. 4906: RAM Disc NG (Exchange Disc).
(RAM Only)
Fail Analysis
1) Check Pickup FFC Connection.
2) Check solder of IC101circumference .
(pin#,4,5,6 pin#85-98,
FE_Servo: R334, C325
TE_Servo: R337, C328
PE_Servo: R335, C326)
3) Exchange IC101(AFE).
4) Exchange Pickup.
5) Exchange IC301(MPU & DSP).
1) Check DVD-Dual Disc.
2) Check Pickup FCC Connection.
3) Check solder of IC101circumference.
(pin#4,5,6 pin#85-98,
FE_Servo: R334, C325)
4) Check Slider FPC Connection.
5) Exchange IC101(AFE).
6) Exchange IC601(Driver).
7) Exchange IC301(MPU & DSP).
1) Check Pickup FFC Connection.
2) Check solder of IC101circumference.
(pin#4,5,6 pin#85-98,
FE_Servo: R334, C325
PE_Servo: R335, C326)
3) Exchange Pickup.
4) Exchange IC101(AFE).
5) Exchange IC301(MPU & DSP).
1) Check Pickup FFC Connection.
2) Exchange Pickup.
3) Check solder of IC101circumference.
(pin#4,5,6 pin#85-98,
TE_Servo: R337, C328)
4) Exchange IC101(AFE).
5) Exchange IC301(MPU & DSP).
47XA: Disc Unmatch(Exchange Disc).
1) Check Pickup FFC Connection.
2) Exchange Pickup (Signal Noisy).
3) Check solder of IC101circumference.
(pin#4,5,6 pin#85-98,
FE_Servo: R334, C325
TE_Servo: R337, C328)
4) Exchange IC101(AFE).
5) Exchange IC301(MPU & DSP).
1) Check solder of IC101circumference.
(pin#4,5,6 pin#85-98)
2) Exchange IC101(AFE).
3) Exchange IC301(MPU & DSP).
Block Diagram
No.04
No.05
No.06
No.07
No.08
N0.09