Denon DVD-A1 - TROUBLESHOOTING

13
DVD-9000/DVD-A1
TROUBLESHOOTING
1. No power
(FL tube doesn't light.)
Check connector insertion.
 Switching power (GU-3391-2):
[CX024, CX025, CX026, CX041,
CX141]
 Main PCB (GU-3389):
[CX031, CX051, CX131, CX141,
CX171, CX272]
Re-insert the connector. When replacing µcom, µcom
peripheral parts, or Main PCB,
perform initializing of DVD player.
Check switching power (GU-3391-2)
voltages.
 [CX141]: 14P PH for Main PCB:
5
,

+5V,
"
(3.3V)
Replace the switching power
unit (GU-3391-2).
(1) Check reset signal (3V) at 67pin of
IC601 on KEY/DISP PCB.
(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-3391-2)
voltages.
 [CX041]: 4P PH for Main PCB:
1
+3.6V
Check soldering of IC201 on Main PCB
(GU-3389).
Check after replacing IC201 on Main
PCB (GU-3389).
Check switching power (GU-3391-2)
voltages.
 [CX141]: 14P PH for Main PCB:
1
+12V
2
-12V
3
+5V
9
3.3V

+5V
!
+3.3V
 [CX041]: 4P PH for KEY/DISP PCB:
1
ON/ST(3.6V)
2
-24V
3
-29V
4
-32V
Replace the switching power unit
(GU-3391-2).
A
No
No
No
No No
No
Perform operation check after
changing Main PCB (GU-3389) with
a perfect one.
There is something wrong in Main PCB
(GU-3389).
→ Check 27MHz output of IC101 (49)
pin/XIN, (105) pin/CLK, and (116) pin/
PCLK2X on Main PCB.
Check soldering of IC108, IC110 and
IC116 on Main PCB (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.