1-26 (No.MA216)
5.3
Spindle section
5.4
Tracking section
Is the disk rotated?
NO
YES
Is 4V present between
pin 6 and pin 7 of IC541?
Does the RF signal
appear at TP RF?
YES
Check the spindle motor
and its wiring.
Is the RF waveform
at TP RF distorted?
Proceed to the Tracking
section
Check the circuits in
the vicinity of IC501
or the pickup.
YES
NO
NO
YES
NO
Is the voltage input at pin
17 and pin 18 of IC541?
Is the power supply
present at pin 3, pin 12
and pin 21 of IC541?
YES
YES
NO
Check the connections
of CD8V power supply.
Check IC541.
NO
Is the voltage output at pin
24 and pin 25 of IC561?
Check the connections
between IC541 and
IC561.
YES
NO
YES
Check IC561.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pin 4, pin 50,
pin 60 and pin 72 of
IC561?
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at TP TE?
Check the circuits in
IC501 or the vicinity
of IC501.
Replace IC501 or repair
the malfunction
connection point
YES
Check IC561.
NO
Check the pickup and
its connections.
YES
NO
Содержание RD-S12
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