AOC LM923
Page 32 of 55
8.2 TROUBLE SHOOTING
8.2.1 Main Board
No power
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 U201 PIN2=2.5V
U202 PIN2=3.3V
Reinsert or check the
Adapter/Inverter
section
X601 and X401 oscillate
waveforms are normal
Check CN201 or replace
U201, U202
Replace U401
Replace U601
Replace X601, X401
OK
OK
OK
NG
NG
NG
NG
NG
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Summary of Contents for LM923
Page 25: ...AOC LM923 Page 25 of 55 6 3 POWER BOARD 715G1142 4 AUE h t t p w w w w j e l n e t...
Page 26: ...AOC LM923 Page 26 of 55 h t t p w w w w j e l n e t...
Page 27: ...AOC LM923 Page 27 of 55 h t t p w w w w j e l n e t...
Page 28: ...AOC LM923 Page 28 of 55 7 PCB Layout 7 1 MAIN BOARD 715L1237 1 h t t p w w w w j e l n e t...
Page 29: ...AOC LM923 Page 29 of 55 7 2 AUDIO BOARD 715L1279 A h t t p w w w w j e l n e t...
