Denon DVD-3800 Service Manual page 15

2. No power
(Both FL tube & LED don't light.)
Check connector insertion.
Switching power (GU-3439-1):
[CX024, CY025, CX028, CY141,
CX041]
Main PWB (GU-3389):
[CX141, CX171]
Check switching power voltages.
[CY141]: 14P PH for Main PWB:
+5V(NSW) +3.3V(NSW)
"
Check Main PWB voltages.
[CX171]:
pin: +5V check
1
→CX171
(CX141 break check)
1
pin: +3.3V check
→CX171
(CX141 break check),
" 2
etc.
No
Re-insert the connector.
No
Replace the switching power unit.
DVD-3800
15