TROUBLESHOOTING GUIDE
TAPE LOADING IS OK, BUT
UNLOADS IMMEDIATELY
Does CYLINDER rotate ?
No
Yes
No
Yes
Is the voltage at pin 2 and
pin 8 of CP1001,
unregulated at 12V ?
Check Power circuit.
No
Yes
Yes
No
In playback, is the
voltage at pin 12 of
CP1001 2.6V ?
Does pin 87 of IC1006 feed
DC5V PULSE ?
Replace CYLINDER UNIT.
Check R1066.
30 Hz
Does TP4501 feed HEAD
SWITCHING PULSE signal ?
No
Yes
Yes
No
Does PG PULSE
signal, appear at pin
104 of IC1006 ?
Replace IC1006.
Yes
No
Check REEL SENSOR.
Does pins 39 and 40 of
IC1006 feed REEL
SENSOR PULSE signal?
E-17
Summary of Contents for VTW21FQR
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