LG HR832T Service Manual page 100

ELECTRICAL TROUBLESHOOTING GUIDE
No 5 V_LOADER
YES
Is the
Vcc 5.3 V supplied to IC207
pin1?
YES
Is there 3 V at
IC207 pin4?
YES
Check IC207
and replace.
No SW_FD( + )
YES
Is the
Vcc -21 V supplied to Q203
collector?
YES
Is there 0 V at
Q201 base?
YES
Is there 3.3 V at
Q201 collector?
YES
Is there -21 V at
Q202 emitter?
YES
Check Q203
and replace.
NO
Check 5.3 VA on SMPS board.
Check PWR_CTL signal
NO
from IC302 (MICOM).
NO
Check FD( + ) on SMPS board.
Check PWR_CTRL signal
NO
from IC302 (MICOM).
NO
Check or replace Q201.
NO
Check or replace Q202.
3-85