19
XV-DV282AP
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP
CONTACT
SIDE
SIDE
CONTACT
UP SIDE
C
D
D
Q305
Q307
Q308
L308
L309
CN102
CN104
R153
R156
R157
C140
C141
C372
Q304
R305
R313
R314
R321
R322
R325
R326
R152
R154
R371
R372
R373
R374 R375
CN101
C1
0
1
1
1
1
5
1
5
E
20
15
10
5
1
Case when this dia
g
nosis is re
q
uired :
When playback of any disc, including a test disc (D
V
D: GG
V
1025, CD: STD-905), cannot be performed
How to dia
g
nose
In the case mentioned above, degradation of the laser diodes (LDs) mounted on the Pickup PCB is suspected.
Measure the voltage between the two ends of one of the resistors mentioned below.
How to turn on the LD
Refer to “6.1 TEST MODE”.
Measure the voltage between the two ends of R322 or R325 on the 09D
V
DM
Assy. If the voltage is 0.4
V
or higher, the 650-nm LD is degraded.
No playback of a DVD :
Measure the voltage between the two ends of R321 or R326 on the 09D
V
DM
Assy. If the voltage is 0.4
V
or higher, the 7
8
0-nm LD is degraded.
No playback of a CD :
If the measurements show degradation
of an LD, replace the D
V
D MECHA
Assy.
SIDE A
A
09 DVDM ASSY
Summary of Contents for XV-DV180
Page 13: ...13 XV DV282AP 5 6 7 8 5 6 7 8 A B C D E F ...
Page 18: ...18 XV DV282AP 1 2 3 4 A B C D E F 1 2 3 4 4 3 DVD LOADER DECODER BLOCK DIAGRAM ...
Page 67: ...67 XV DV282AP 5 6 7 8 5 6 7 8 A B C D E F ...
Page 91: ...91 XV DV282AP 5 6 7 8 5 6 7 8 A B C D E F H H SIDE B SIDE B H POWER SUPPLY ASSY ...