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AUTO TRACKING DOES NOT
OPERATE
By manual tracking,
does the DC level at pin 59
of IC4001 change?
Yes
In auto tracking, is the
voltage at pin 30 of IC1001
more than DC1.65V?
Yes
Replace IC1001.
WHEN PLAYBACK, FAST
FORWARD OR REWIND MODE
IS ACTIVATED, UNIT STOPS
IMMEDIATELY
Does CAPSTAN DD
MOTOR rotate?
Yes
Does the REEL SENSOR
PULSE signal appear at pins 39
and 40 IC1001?
Yes
Check IC1001 and check
peripheral circuit.
1-28
TROUBLESHOOTING GUIDE
No
Does the CTL PULSE
No
(about 1.0Vp-p) appear at pin 7
of IC1001?
Yes
No
No
Check CYLINDER UNIT.
No
Check CONTROL HEAD.
1.0Vp-p
Refer to section "CAPSTAN DD
MOTOR NOTROTATING".
Check Q1002.
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