Denon DRA-800H Service Manual page 71

5. SMPS
DC 5V is not output.
YES
Replace the [IC601 : TOP268VG
Is [IC601 : TOP268VG] damaged? and D6001/ D6002 / D6003 /
D6004].
NO
YES
Is the fuse [F6001] functioning Is [D6001/ D6002 / D6003 /
properly? D6004] damaged?
NO
YES
Are there any short circuits
Repair the short circuited area
caused by the soldering on the
on the PCB.
PCB?
NO
YES
Are any parts damaged? Check the damaged parts.
Operation waveform for each part
After primary side rectification
(Caution: High voltage, electric shock)
YES
Replace the damaged part.
YES
Replace the damaged part.
71
A
Primary drain
(Caution: High voltage, electric shock)
*OPTION
C6002 250V/0.01uF
*OPTION
D 6001 1N4007
D 6002 1N4007
D 6003 1N4007
D 6004 1N4007
D 6005 1N4007
D 6006 1N4007
J6002 J6003
JUMPER JUMPER
C6003
250V/0.01uF
*OPTION
D 6007 ZD 618 D 6008
UF4004
1N4007 Z27V
ZD 601
Z12V
*OPTION
6 4 3 2 1
D F C X V
Q6002 IC601
ZD 621
2N7002KA CVIT OP268VG
S S S S S S
Z7.5V
7
D 8 9 10 11 12
G
S
SMPS unit
A
(Unloaded)
A
Set
B C
After secondary rectifications
R6034 C6027
OPEN OPEN
1
2
3
T 6001
VLT 9Z132ZW D 6013
RBQ30T 65A
1 14
J6001
2 13
OPEN
3 12
11
4
5 10
6 9
R6018
**OPTION
7 8 5.6K (0.2W ) C6020
0.1uF(1608)
D 6010 OPEN
IC603 KIA2431AP
3 1
IC602 ANODE
EL817B 2
C6023 C6024
400V/2200pF
0.047uF(1608)
R6026
OPEN(1608)
BK603 C6025 OPEN(1608)
CMD 1A629
BRACKET
IC604
CVIPST 8448NR_A
C6029
0.047uF(1608)
B C
B C
L6001
0