LG CED-8042B Manual page 65

BETA Measurement Circuit Check.
After inserting Test Disc
(TCD-784), 1x play.
RRF : 3+/-1.0V?
YES
IC604 Pin 7 : 3+/-1.0V?
IC603 Pin 11 = H?
(CDR/RW)
YES
RFBETA : 2+/-1.0V?
YES
Is ASYM2 the Peak of RFBETA?
YES
Check the cold soldering for the IC204,
IC203 and then replace IC204, IC203.
Check the cold soldering for the D603,
R602, R606, C656, Q605, IC617 and then
replace Q605, IC617.
Check the cold soldering for the IC202
pin 77, 78, 79 and then replace IC202.
72
NO
NO
NO
NO
NO
OK
Check the cold soldering for the IC601
pin 63 and then replace IC601.
Check the cold soldering for the R647,
R650, IC604 and then replace IC604.
Check the cold soldering for the IC603,
IC205, IC203 and then replace IC603,
IC205, IC203.
Check the cold soldering for the IC603
and then replace IC603.
Check the cold soldering for the D604,
R603, R604, C657, Q607, IC617 and then
replace Q607, IC617.