TROUBLESHOOTING GUIDE
TAPE LOADING IS OK, BUT
UNLOADS IMMEDIATELY
No
Yes
Does CYLINDER rotate ?
30 Hz
Check REEL SENSOR.
No
Yes
Replace IC1001.
Check Power circuit.
Yes
Yes
Yes
No
Replace CYLINDER UNIT.
Check R1059, R1080, R1058 and
D1003.
No
Yes
Does PG PULSE
signal appear at pin
13 of IC1001 ?
No
No
No
Yes
Is the voltage at pin
6 of CP1002 UNREG
12V ?
Does DC5V PULSE signal
appear at pin 44 of IC1001 ?
Is the voltage at pin 46 of
IC1001 DC2.5V ?
In playback, is the
voltage at pin 3 of
CP1002 1.2V ?
Does TP4001 feed HEAD
SWITCHING PULSE
signal ?
Does REEL SENSOR
PULSE signal appear at
pins 69 and 70 of IC1001 ?
E-13