Diagnosis Of Pickup Assy - Pioneer XW-NAV1-K Service Manual

5

5.3 DIAGNOSIS OF PICKUP ASSY

QQ
3 7 63 1515 0
Case when this diagnosis is required :
When playback of any disc, including a test disc (DVD: GGV1025, CD: STD-905), cannot be performed
How to diagnose
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.
No playback of a DVD :
Measure the voltage between the two ends of NR2301 on the MAIN Assy.
If the voltage is 0.17 V or higher, the 650-nm LD is degraded.
No playback of a CD :
Measure the voltage between the two ends of NR2301 on the MAIN Assy.
If the voltage is 0.20 V or higher, the 780-nm LD is degraded.
TE
L 13942296513
www
.
5
http://www.xiaoyu163.com
6
for DVD laser diode
for CD laser diode
IC1708
R5508
R5507
NR2301
DMJ125A
Q2301 Q2302
R2304 R2306
C1706 C1760
L1701 C1709 L1706
R1703
R1706
C1711
R4042
R4041
Q1705
C1749 Q1706
R1714
C1722 R1718
C1752
C1755
R1721
C1756
R1728
C1734
R1729
C1740
C1763
IC1704
R1735
C1701
C1767
R1727
Q1702
C1708
L1704
R1704 C1741
C1710
L1707
R1707
C1712
IC1708
C2316
R2319
R2309
R1738
NR2301
R2307 R2310
IC2301
C2311 C2312
D2301
D2302
C2315 R2313
R2314 C2314
Q2301 Q2302
R2304 R2306
x ao u163
y
i
6
http://www.xiaoyu163.com
2 9
8
Q Q
3 6 7 1 3
C5515 R5518
D
R1730
C1765
R1737 R7006
D7004 D7003 R7036
B7003 R7028
C1768
B7010
B7002 R7027
C7043 C7042
Q7008
R7060
C7044 R7039
C7040 C7039
C7041 R7018
R7017
R7031
IC7007 Q7001
Q1704 C7012 R7013 C7013
R7033
W876
R7001 R7003
R7002 R7004
C7081
C7006
C7106
C7001 C7002 C7027
R5519 C7034
C7028
C7035
C7051
W840 C7037
C7029
C7038
W842 C7030
R7076
C7069 C7103
R5508
R5507 C7063 C7065
C5515 R5518 R7049
R7041
R7058 R7098
C7059 C7062
R7059
R7043 R7086
W878 W879
W880 W909
R7087
R7050
DMJ125A
.
XW-NAV1-K
7
9 4 2 8
If the measurements show degradation
of an LD, replace the LOADER Unit.
1 5 0 5 8 2 9 9 4
MAIN ASSY
R4058 C4067
W854 B4008
C4075
C4054 W896
C4055 R4043
D4001
D4002
C4065
R4050
IC4002
R4056
C4057
R4037
R4011
IC4005
W808
R3014 R4061
C4060 C4061 C4062
R4003
R3015 W907
R3027
C4039 C4043
C3006 R4006
R3034
R3026 W906 W892
C3007
C4014
C4038 Q4001 R5904
C4016 C4015
C4017
R3016 1
76
C4044
R3045
R4034 Q5901
R3005
C5906
B5901
B5902
W910
R3033
B4004
C7079
51
R3046 26 R4021
L7001
R4020
C4049
R3017
C7080
C4050
C3008
R7021
IC4003
IC3004
Q7003
m
W916
C7018
R7026
R3035
C7019
Q3001
R7025
Q7006
co
7
8
9 9
A
B
C
2 8 9 9
D
SIDE B
B4010
E
R7005
Q7004
R7020
Q7005
F
27
8