Hitachi DV-RV8500E/UK Service Manual page 26

Details of Servicing and Troubleshooting > Troubleshooting
(2) SYSTEM Circuit
Stops automatically
No
IC501-23: H.SW waveform?
Yes
No
IC501-3: Take-up
reel pulses?
Yes
Replace IC501.
Supplement: Automatic stop may occur when grease or oil in the mechanism block has dried up.
Cassette tape does not load smoothly
No
Is 12 V supplied
to PMC01-8?
Yes
Does "Hi" signal appear
No
at IC501-32 when
cassette is inserted?
Yes
Check deck mechanism.
No key operation
No
Is 5 V supplied
to IC501-73?
Yes
Does FL display change
No
when operation
button is pressed?
Check DPG/DFG signals
from cylinder motor.
No
Is 5.0 V supplied
to RS501?
Yes
Replace RS501.
Check power supply line.
No
Is 5.0 V supplied to
R544?
Yes
Check CS501 (CST SW)
and its peripheral circuits.
See "No 5.3VA" in
(1) SMPS circuit.
Replace any
faulty switches.
3 - 6
Check power supply line.
Check 5.3VA
power supply line.