LG GCE-8240B Service Manual page 66

Confirm the Beta
measurement circuit.
Insert Test Disk (TCD-T84) and
play 1x.
YES
IC401 pin 85(RRF)?
YES
IC401 pin 84(RRFIN)?
YES
•
IC301 pin 39(PHO1)
•
IC401 pin 84(RRFIN)
maximum value?
YES
IC301 pin 42(MPXOUT):
AUX3.
YES
IC301, pin 41(BHO1) ,
IC401 pin 84 (RRFIN)
minimum value?
YES
Normal
72
NO
•
Check the connection of IC401 pin 85.
•
Check and replace IC401 (CXA2638R).
NO
•
Check the connection of IC401 pin 84.
•
Check and replace IC401 (CXA2638R).
NO
•
Check the connection of IC401 pin 76, 77.
•
Check and replace IC401.
NO
•
Check the connection of IC401 pin 61.
•
Check and replace IC401.
NO