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Troubleshooting Guide - LG GSA-4040B Service Manual

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ADJUST BLOCK DIAGRAM
(01) Laser Power Adjust (using RD Power/WR Power/Erase Power)
MPU
IC801
Pin#27
pin#28
(02) High Frequency Adjust
Setting
MPU
IC801
(03) Data Slice/Equalizer Boost/Raw Slice/ Equalizer Frequency Adjust
Setting
MPU
IC801
Pin#86,88
(04) Circuit Offset Adjust
Setting
MPU
IC801
(05) Tracking Driver Offset Adjust
MPU
IC801
#31
#33
74

TROUBLESHOOTING GUIDE

DSP
IC701
Setting
FFC
#16
AFE
IC101
FFC
#10
#14
IC103
IC104
IC105
FFC
45-49
DSP
IC701
FFC
DSP
IC701
Setting
FE:R701,C703
DSP
IC701
FE:R706,C708
FE:R702,C704
Driver
TACT-:
IC601
#47
TACT+:
#49
Pickup
LD
Front
Monitor
Driver
Pickup
LD
Driver
Pin#77
AFE
IC107
IC101
IC108
C131
Pin#
86-98
FFC
AFE
IC101
FFC
Pickup
Pin#65
Pickup

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