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Are pini6 and 42 of 1C703
+5V?
Is pin25 and 47 of IC703
-5V?
Are +12V and -12V applied to pint
and pin5 of C704?
NO
YES
TOC can be read ?
ale,
YES
Can each tune be
YES
OK
searched ?
|
KT
NO
NO
Check 1C701, IC703,
IC801 and connections.
Can the pulse
waveform be observed
at pin 20 of IC 703
when auto searching?
YES
Check !C704 and .
associated
components.
Spindle section
Are +12V and -12V applied to pint
and pin5 of !C704?
Are +12V and -12V applied to pin8
and pin4 of IC705?
NO
YES
Does the spindle motor | NO _ |Is pin3 of IC701 +0V?
NO
stop in the stop status?
Is pin4 of 1C701 + 0V?
YES
YES
Defective IC704 or
1C705.
fa)
wn
Does the disc begin
rotating after closing
ma
OUtPUe St
no
in7 of IC704?
the CD tray?
gl
YES
YES
Check the spindle
motor and the wiring.
Does the spindle motor
stop soon after the stop
button is pressed?
Is +3.5V output at
pin7 of 1C704 when
stop button is
pressed?
NO
NO
YES
Check the spindle
motor and
connections.
Check the power
supply circuit.
Is the pickup at the
YES
innermost position?
NO
Is pin8 of iC704 -1.8v
LNO
?
YES
Check the feed motor
and connections.
Check the power
supply circuit.
Check IC701 and
associated
components.
Check !C701 and
associated
components
Is the pin 3 of IC701 OV | NO
when the stop button is
pressed?
YES
Check 1C705 and
associated components.
| CA-MXS3BK
Check the rest switch,
1€703,801
and
connections.
Is there
~2.2V at pin
NO
20 of C703?
YES
Check 1€704 and
associated
components.
Check 1C703, 801 and
connections.
Check C701 and IC81_
(N,, 20373)
1-59
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