32
Troubleshooting
This chapter provides troubleshooting information for the AL1906:
1. No power
Cha
ter 4
OK
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=3.3V, U702
PIN2=3.3V
Reinsert or check the
power section
X401 oscillate waveforms are
normal
Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?
OK
OK
NG
NG
NG
Replace U401
Replace X401
OK
NG
Check power section
Replace U701, U702
NG
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