TROUBLESHOOTING GUIDE
E-23
TAPE LOADING IS OK, BUT
UNLOADS IMMEDIATELY
Does CYLINDER rotate ?
Yes
No
No
Yes
Check Power circuit.
In playback, is the
voltage at pin 5 of
CP1004 1.3V ?
No
Yes
No
Is the voltage at pin 77 of
IC1001 1.4V ?
Check R1028 and R1020.
Yes
Replace CYLINDER UNIT.
No
No
Yes
Yes
Replace IC1001.
Yes
No
Check REEL SENSOR.
Is the voltage at pin 2 of
CP1004, unregulated at
12V ?
30 Hz
Does TP1002 feed
HEAD SWITCHING
PULSE signal ?
Does pins 79 and 80 of
IC1001 feed REEL SENSOR
PULSE signal ?
Does PG PULSE
signal, 4.2Vp-p appear
at pin 90 of IC1001 ?
