Denon DVD-3800 Service Manual

13
DVD-3800
1. No power
(FL tube doesn't light.)
Check connector insertion.
 Switching power (GU-3439-1):
[CX024, CX025, CX026, CY041,
CX141]
 Main PWB (GU-3389):
[CX031, CX131, CX141, CX171,
CX272]
Re-insert the connector. When replacing µcom, µcom
peripheral parts, or Main PWB,
perform initializing of DVD player.
Check switching power (GU-3439-1)
voltages.
 [CX141]: 14P PH for Main PWB:
5
,

+5V,
"
(3.3V)
Replace the switching power
unit (GU-3439-1).
(1) Check reset signal (3V) at 67pin of
IC601 on DISP PWB.
(2) Check 4.3MHz at 65pin of IC601.
(1) Check R681, R602 solderring.
(2) After checking X601 and IC601
soldering, change X601.
If still NG after changing, replace
IC601.
Check switching power (GU-3439-1)
voltages.
 [CX041]: 4P PH for Main PWB:
1
+3.6V
Check soldering of IC201 on Main PWB
(GU-3389).
Check after replacing IC201 on Main
PWB (GU-3389).
Check switching power (GU-3439-1)
voltages.
 [CX141]: 14P PH for Main PWB:
1
+12V
2
-12V
3
+5V
9
3.3V

+5V
!
+3.3V
 [CX041]: 4P PH for DISP PWB:
1
ON/ST(3.6V)
2
-24V
3
-29V
4
-32V
Replace the switching power unit
(GU-3439-1).
A
No
No
No
No No
No
Perform operation check after
changing Main PWB (GU-3389) with
a perfect one.
There is something wrong in Main PWB
(GU-3389).
→ Check 27MHz output of IC101 (49)
pin/XIN, (105) pin/CLK, and (116) pin/
PCLK2X on Main PWB.
Check soldering of IC108, IC110 and
IC116 on Main PWB (GU-3389), then
change IC101 if it's NG. Change IC111 if
it's still NG.
No No
Note: When switching power unit is repairable, refer to the waveforms and voltages shown in Schematic Diagram.
TROUBLESHOOTING

Denon DVD-3800 Specifications

General

Brand	Denon
Model	DVD-3800
Category	DVD Player
Language	English