2-1
TROUBLESHOOTING GUIDE
1. SMPS BOARD
YES
YES
YES
YES
No power
Replace SMPS board
Connect the open line
Replace F901
Check a 3.7 V lines short
Replace PC951, PC972, IC901
Check BD901 “+” to “
-
” pin impedance
Replace PC972, IC902's components
Check around IC901’s components
(Short, Open)
Low impedance:
Replace IC901, BD901
NO
NO
NO
NO
Check the AC
line pattern
Check fuse F901
Check C976
voltage (3.9 V)
Check IC901
Vcc voltage (10 V ~ 30 V)
YES
Check SMPS second part lines short
Check main or AMP board short
NO
Check C963
voltage (5.6 V)
SECTION 2. ELECTRICAL PART
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