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KD-S7350
JVC KD-S7350 User Manual
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KD-S7350/KD-S690
1-24 (No.49778)
3.2
Troubleshooting
3.2.1
Feed se
ction
3.2.2
Focus section
3.2.3
Spindle
section
3.2.4
Tracking sec
tion
Is the voltage output at
IC521 pin u 5V or 0V?
Check the f
eed motor
.
Is 4V present at both
sides of the f
eed motor?
Is the wiring for IC521
(90) ~ (100) correct?
Is 5V present at IC581
pin 6?
Is 6V or 2V present at
IC581 Q and R?
Check IC581.
Check the feed motor
connection wiring.
Check the vicinity of
IC521.
YES
YES
NO
NO
NO
YES
YES
YES
NO
Check CD 9V
and 5V.
When the lens is
moving:
Check the circuits in
the vicinity of IC581
pins H ~ K.
Check the pic
kup and
its connections
.
NO
YES
YES
Does the S-search
wa
vef
or
m appear at
IC581 pins H and I?
4V
Is the disk rotated?
Does the RF signal
appear at
TP1?
Is 4V present between
IC581 pins 1 and 2?
Check the spindle motor
and its wiring.
Is 4V present at IC521
pin x ?
Check the vicinity of
IC581.
Check IC501 and
IC521.
YES
NO
NO
NO
NO
NO
YES
YES
YES
Check the circuits in the
vicinity of IC501 J ~ O
or the pickup
Is the RF waveform at
TP1 distorted?
Proceed to the
T
racking
section
When the disc is rotated
at first:
Check the circuit in the
vicinity of IC501 pins
~ 2C.
Check IC521.
Check the pickup and
its connections
YES
YES
YES
Is the trac
king error
signal output at
TP3 ?
Approx. 1.2V
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
23
25
Table of Contents
49778.pdf
1
SECTION 1
2
1.1 Safety Precautions
2
1.2 Preventing static electricity
3
1.2.1 Grounding to prevent damage by static electricity
3
1.3 Handling the traverse unit (optical pickup)
3
1.4 Attention when traverse unit is decomposed
3
SECTION 2
4
2.1 Main body section
4
2.1.1 Removing the front panel assembly (See Fig.
4
2.1.2 Removing the front chassis assembly (See Figs.
4
2.1.3 Removing the heat sink (See Fig.
5
2.1.4 Removing the bottom cover (See Figs.
5
2.1.5 Removing the rear bracket (See Fig.
5
2.1.6 Removing the main board assembly (See Fig.
6
2.1.7 Removing the CD mechanism assembly (See Fig.
6
2.1.8 Removing the front board (See Figs.
7
2.2 CD Mechanism Assembly
8
2.2.1 Removing the top cover (See Figs.
8
2.2.2 Removing the connector board (See Figs.
9
2.2.3 Removing the DET switch (See Figs.
10
2.2.4 Removing the chassis unit (See Figs.
11
2.2.5 Removing the clamper assembly (See Figs.
12
2.2.6 Removing the loading / feed motor assembly (See Figs.
13
2.2.7 Removing the pickup unit (See Figs.
14
2.2.8 Reattaching the pickup unit (See Figs.
14
2.2.9 Removing the trigger arm (See Figs.
15
2.2.10 Removing the top plate assembly (See Fig.
15
2.2.11 Removing the mode sw. / select lock arm (See Figs.
16
2.2.12 Reassembling the mode sw. / select lock arm (See Figs.
17
2.2.13 Removing the select arm R / link plate (See Figs.
18
2.2.14 Reattaching the Select arm R / link plate (See Figs.
18
2.2.15 Removing the loading roller assembly (See Figs.
19
2.2.16 Removing the loading gear 5, 6 and 7 (See Figs.
20
2.2.17 Removing the gears (See Figs.
21
2.2.18 Removing the turn table / spindle motor (See Figs.
22
SECTION 3
23
3.1 Adjustment method
23
3.2 Troubleshooting
24
3.2.1 Feed section
24
3.2.2 Focus section
24
3.2.3 Spindle section
24
3.2.4 Tracking section
24
3.2.5 Signal processing section
25
3.3 Maintenance of laser pickup
26
3.4 Replacement of laser pickup
26
SECTION 4
27
4.1 HA17558F (IC571) : Ope. amp.
27
4.2 LA6579H (IC561) : 4-Channel bridge driver
28
4.3 TA2157FN (IC501) : RF amp
30
4.4 TC94A14FA (IC521) : DSP & DAC
32
4.5 UPD178078GF-592 (IC701) : System CPU
34
4.6 RPM6938-SV4 (IC602) : Remote control receiver
36
p49778sch.pdf
39
Cover
39
Block diagram
41
Standard schematic diagrams
42
Printed circuit boards
48
Back cover
50
49778par.pdf
51
Cover
51
Exploded view of general assembly and parts list (Block No. M1)
52
CD mechanism assembly and parts list (Block No. MB)
55
Electrical parts list (Block No. 02)
58
Packing materials and accessories parts list (Block No. M3,M5)
64
4
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JVC KD-S7350 Specifications
General
Brand
JVC
Model
KD-S7350
Category
Car Receiver
Language
English
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