Troubleshooting Guide - LG GSA-4167B Service Manual

(01) Laser Power Adjust (using RD Power/WR Power/Erase Power)
MPU & DSP
IC301
Pin#175
(02) High Frequency/NRZI skew Adjust
MPU & DSP
IC301
(03) Data Slice/Equalizer Boost/Raw Slice/ Equalizer Frequency Adjust
MPU & DSP
IC301
(04) Circuit Offset Adjust
MPU & DSP
IC301
(05) Focus Amp. Adjust for DVD-Dual
MPU & DSP
IC301

TROUBLESHOOTING GUIDE

Setting
FFC
#12
AFE
IC101
FFC
#6 #10
IC102
pin#98
FFC
17,18,20,21
FFC
Pin#110
C137
Pin#203
Setting
FE:R102,C405
#2
AFE
IC101
TE:R101,C101
#1
PE:R103,C406
#3
Setting
AFE
IC101
FE:R102,C405
#2
R329,C335
#40
Driver
IC601
Pickup
Front
LD
Monitor
Driver
Pickup
LD
Driver
Pin#79
AFE
IC101
Pin#
Pickup
87-90
FFC
Pin#
Pickup
87-90
FFC
Focus:#34-35
Slider FPC
Slider, #6,8-10
Pin#21
DVD-Dual Disc
73