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Troubleshooting
This chapter provides troubleshooting information for the AL1922:
1. No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Measure U701 PIN2=1.8V
U702 PIN2=3.3V
X401 oscillate waveforms
are normal
All manuals and user guides at all-guides.com
No power
NG
NG
OK
NG
OK
OK
Replace U401
Reinsert or check
the power section
Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?
NG
OK
Replace U701, U702
NG
Replace X401
41
Chapter 4
Check power section
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