25
DV-310-S
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5.2 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP ASSY
SIDE A
1
33
65
97
DMG099A
X4001
J7302
Q
8
014
Q
8
019
Q
8
020
Q
8
021
Q
8
005
R
8
057
R
8
069
R
8
066
R
8
061
R
8
049
R
8
04
8
R
8
063
R
8
067
R
8
056
R
8
073
R
8
0
8
2
R
8
074
R
8
077
R
8
0
8
1
R
8
07
8
R
8
0
8
0
R
8
079
R
8
0
8
3
R
8
0
8
5
R
8
037
R
8
0
8
4
R
8
039
R
8
040
R
8
03
8
R
8
035
R
8
036
C
8
066
C
8
073
C
8
070
W8
40
C
8
042
C
8
056
C
8
057
C
8
05
8
C
8
067
C
8
069
C
8
072
C
8
077
C
8
07
8
J
8
001
CP730
1
C7316
C7317
C731
8
C7319
R7319
R7320
R7321
B7304
B7305
B4002
B
8
004
C
8
036
R7302
IC4003
IC7301
R4059
R4060
R4061
R4062
C7311
R7307
C7305
C7306
C7307
C730
8
D7306
D7305
R7301
IC
8
003
J
8
003
R4035
C7303
C
8
051
C
8
053
Q
8
01
8
Q
8
013
C7309
C7310
R7305
D7312
D7310
D7311
C
8
03
8
L7301
Q4001
C7315
IC7302
Q7302
IC4001
R2316
W8
05
W8
06
C2307
C2312
C2311
R2310
W8
02
R2313
R2312
R2327
R231
8
R2317
R2325
C2306
IC2301
R4011
C4116
C4112
IC4006
C4100
C4099
C409
8
C4096
C4095
B4001
R4013
C2301
CP2302
C2321
C2320
R4012
R2309
R2306
R2307
R232
8
R2319
Q2303
Q2304
Q2301
Q2305
Q2302
C4052
IC4005
R4066
C4049
N
R4002
R4027
C4050
CP2303
CP4003
IC4009
C4137
C4141
R4063
R4073
R4072
C4091
C4104
IC4004
R4040
R4044
W8
10
R4053
R4054
C407
8
R4033
B400
8
C4029
C4002
R4039
W8
0
8
R4024 R4025
C4090
C40
8
9
R4014
R4015 R4016
B4007
W8
29
R401
8
R4019
C4006
R4031
C4039
C4044
L4001
C4142
C4134
W8
44
W8
09
D4003
W8
32
W8
39
C40
8
0
CP2301
W8
26
R400
8
C4010
C2303
W8
16
W8
17
C4072
C4012
N
R2301
R4074
C2304
C4047
C4046
C2302
R2344
C2323
C
8
059
R730
8
R7306
C7312
R
8
059
R
8
060
C7304
C7313
C4056
R
8
076
R
8
051
R
8
014
C2322
R2342
C40
8
6
R4022
C4011
C4062
C4101
C4102
C4005
C4007
C4140
C4077
R4002
C2305
R2311
R4017
R230
8
C40
88
C404
8
C4051
R4046
CP40
02
C4132
CP4004
Q7301
D4002
R4045
R2326
R7316
R7315
R731
8
R7317
Q7305
B7301
R405
8
W8
20
R4075
R2316
W8
05
W8
06
C2307
C2312
C2311
R2310
W8
02
R231
3
R231
2
R2327
R231
8
R2317
R2325
C2306
IC2301
C
C4095
C2301
C2321
C2320
R2309
R2306
R2307
R23
2
R2319
Q2303
Q2304
Q2301
Q2305
Q2302
CP2303
C4090
C40
8
9 R4015 R4016
R4031
W8
32
W8
39
CP2301
N
R2301
C2304
C2302
C4056
C410
1
C4102
C4007
C2305
R2311
R4017
R230
8
R2326
Case when this dia
g
nosis is re
q
uired :
W
hen 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 Assy is suspected.
Measure the voltage between the two ends of one of the resistors mentioned below.
Measure the voltage between the two ends of
N
R2301 on the D
V
D MT PCB Assy.
If the voltage is 0.17
V
or higher, the 650-nm LD is degraded.
No playback of a DVD :
Measure the voltage between the two ends of
N
R2301 on the D
V
D MT PCB Assy.
If the voltage is 0.20
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 PICKUP Assy.
D
V
D MT PCB ASSY