23
DV-220V-K
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
CP
5901
IC4005
CP
2302
C
P
4
0
0
4
J
8
001
J7302
J
8
003
L
5901
L5
9
0
2
R4066
L4001
CP2301
NR4002
R4027
C4050
C
8
03
8
R
8
039
Q
8
005
R
8
03
8
R
8
037
R
8
036
Q
8
01
8
Q
8
019
R
8
0
8
5
C
8
077
R
8
0
8
4
C
8
07
8
R
8
0
8
1R
8
07
8
C
8
070
C
8
073
R
8
0
8
0
R
8
079
IC
8
003
C
8
067
R
8
063
R
8
061
R
8
04
8
R
8
049
C
8
051
C
8
053
C
8
066
C
8
05
8
C
8
059
B
8
004
Q
8
014
Q
8
013
R
8
056
C7316
C7317
C7319
C731
8
W
88
4
R7317
C7307
C7309
C7310
C4047
C4039
C7311
C402
8
Q4002
R4034
W
8
49
W
8
50
IC2301
C2306
R2316
C2307
R2310
C2311
Q2302
Q2303
NR2301
C2320
C2321
R2306
W
888
W
88
9
W
8
91
R2326
R2319
R232
8
R2342
C2322
R2344
C2323
R2343
R2341
C4046
C4044
R4046
X
4001
R4025
R4024
IC4003
IC4006
C4100
W
8
22
R4011
R4012
R4013
W
8
20
Q4005
C407
8
L7301
W
8
19
C40
8
0
R4075
C4104
IC
4
0
0
9
R4063
IC4007
C4076
W
8
44
C4077
IC5902
C4130
R5921
C5924
C5922
R5901
C5923
IC4004
D4002
D4003
W
8
31
W
8
09
R404
8
W
8
24
R4054
R4043
W
8
10
R4047
R4040
R4044
C4114
C
8
036
W
8
02
R401
8
R4019
R4015
R4016
W
88
1
W
8
70
W
88
0
W
8
77
W
8
79
W
8
7
8
C4070
R4005
R4076
R4030
R4074
W
8
39
C4023
C4122
C4133
C4043
C4051
C2305
C
8
074
W
8
61
W
8
60
W
8
6
8
W
8
62
W
8
69
C5925
C4096
C40
8
6
C4121
W
8
33
R4002
R4017
R4029
R
8
073
W
8
34
C4140
B4003
C40
8
2
R4004
R4059
R4062
R4060
R4061
C4031
C4021
R4053
C2304
C4024
CP
4002
L4003
IC4001
R4039
W
8
32
C4040
W
8
0
8
C5905
B400
8
C2325
R2317
W
8
35
C4036
CP4003_1
W
8
72
W
8
73
W
8
71
D7312
D7311
D7310
DMH111A
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 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 780-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
CP2301
R
8
061
R
8
04
8
R
8
049
C
8
051
C
8
05
8
C
8
059
C
7
C7310
C4047
IC
Q2302
Q2303
NR2301
C2320
C
2321
R2306
W
888
W
88
9
W
8
91
R2343
R2341
W
8
02
R
R
W
88
1
W
8
70
W
88
0
W
8
77
W
8
79
W
8
7
8
W
8
33
R4002
R4017
W
8
34
B
R4059
R4062
R4060
R4061
C2304
R2317
W
8
72
W
8
73
W
8
71
2
1
for CD laser diode
for DVD laser diode
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