Hitachi DV-RV8500E, Service Manual

Page: 34 / 91

3 - 14
Details of Servicing and Troubleshooting > Troubleshooting
3-2-2 Troubleshooting mechanical block
(1) Deck mechanism
Is the position of
mode SW appropriate?
Does capstan motor
rotate?
Replace capstan motor.
Check CAP Vcc line.
Yes
No
Yes
No
Yes
No
Is power supplied
to PMC01-2?
Align the boss of mode
SW and hole in drive
gear, and assemble them
(see page 4-4).
No fast forward or rewind
SYSTEM circuit
(replace IC501).
Is pressure roller
compressed to
capstan shaft?
Do supply/take-up reel
sensors output pulses?
Yes
No
Yes
No
Replace reel sensors.
Check position
alignment of cam gear
(see page 4-15).
Stops automatically during playback and
search
Check
SYSTEM microprocessor,
and replace if
necessary.
Does supply end sensor
(ES502) output "Hi"?
"Hi": At least 3.5V
"Lo": 0.7V or less to 1V
Replace supply end
sensor (ES502).
Is 5 V supplied to
end sensor?
IR LED (LD501):
0.8-1.5 V?
Yes
Yes
Yes
No No
No
No auto rewind at end of tape
Check 5.0V line.
Replace IR LED (LD501).
Check SYSTEM circuit
(replace IC501)