JVC KD-S777R User Manual

Feed section
Focus section
Spindle section
Tracking section
Is the voltage output at
IC541 pin "53" 5V or 0V?
Is the wiring for IC541
(90)~(100) correct?
Is 5V present at IC501
pin "20"?
Check CD 9V
and 5V.
Check the vicinity of
IC541.
Check the feed motor
connection wiring.
Is 6V or 2V present at
IC501 "10" and "11"?
Check IC501.
Is 4V present at both
sides of the feed motor?
Check the feed motor.
YES
YES
NO YES NO
YES
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES YES
YES
YES
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC501 pins "6" and "7"?
Check the circuits in
the vicinity of IC501
pins "6","7"and"18".
Check the pickup and
its connections.
Is the disk rotated?
Does the RF signal
appear at TP1?
Is the RF waveform at TP1
distorted?
Proceed to the Tracking
section
Is 4V present at IC501
pins "8" and "9"?
Check the spindle motor
and its wiring
Check the circuits in the
vicinity of IC521 "19"~
"24" or the pickup
Is 4V present at IC541
pins "55" ?
Check IC521 and
IC541.
Check the vicinity of
IC501.
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error signal
output at IC521 "12"?
Check IC541.
Check the circuit in the
vicinity of IC521 pins
"2"~"12".
Check the pickup and
its connections.
NO
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
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JVC KD-S777R Specifications

General

Brand	JVC
Model	KD-S777R
Category	Car Receiver
Language	English