JVC KD-SH1000E, Руководство по обслуживанию

Страница: 27 / 77

(No.MA255)1-27
SECTION 5
TROUBLESHOOTING
5.1 Feed section
5.2 Focus section
Check the feed motor.
Is 4V present at both
sides of the feed motor?
YES
NO
Is the voltage output at
pin 4 and pin 5 of IC681?
Is the power supply
present at pin 3, pin 12
and pin 21 of IC681?
Check the connections
between the feed motor
and IC681.
YES
NO
Is the voltage input at pin
28 of IC681?
YES YES
Check IC681.
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at
pin 58 of IC501?
Check the connections
between IC681 and
IC501.
YES
NO
Is the power supply
present at pins 8,16,25,
28,32,53,71 and pin 90
of IC501?
YES
Check IC501.
NO
Check the connections
of CD8V power supply.
When the lens is
moving:
Does the S-search
waveform appear at
IC681 pins 8 and 9?
4V
Check the pickup and
its connections.
Is the power supply
present at pins 8,16,25,
28,32,53,71 and pin 90
of IC601?
YES
NO
Is the voltage input at pin
13 of IC681?
YES
NO
Is the voltage output at
pin 60 of IC601?
NO
YES
Check the connections
between IC681 and
IC601.
Is the power supply
present at pin 3, pin 12
and pin 21 of IC681?
YES
Check IC681.
NO
Check the connections
of CD8V power supply.
YES
Check IC601.
NO
Check the connections
of CD8V power supply.