Audio Part; Pcb Ass'y - LG LX-230A Manual

❏ AUDIO PART
P-SENS PART
Does +5V appear at ZD901?
YES
Check the pattern of
IC301 pin .
26
VKK PART
Does DC - 27V appear at
PN601 pin .
16
NO
YES
Check the pattern of FRONT

PCB ASS'Y

Check the waveform
NO
of D937 (+).
YES
Replace ZD901.
Check the DC -34V of C928(-)
YES
Check the DC -27V of
ZD 902(-)
YES
Check the DC -27V of
Q901 "E"
YES
Check the PATTERN
- 2-7 -
NO
Replace the D937
NO
Replace the D936
NO
Replace the ZD902
NO
Replace the Q901