Hitachi DV-RV8500E/UK Service Manual page 30

Details of Servicing and Troubleshooting > Troubleshooting
No Y signal during playback
Is 5V supplied to
No
IC301-4, 22, 47, 50,
52, 60, 84, 92?
Yes
2
Is I C BUS signal
No
supplied to
IC301-73, 74?
Yes
No
Is V.H.SW signal
to IC301-80?
Yes
Does approx. 3.4 V
No
appear at IC301-80
when V.H.SW is Hi?
Yes
No
Does Y signal appear
at IC301-33?
Yes
No
Does Y signal appear
at IC301-31?
Yes
Replace VDR PCB.
No chroma signal during playback
Is 5V supplied to
No
IC301-4, 22, 47, 50,
52, 60, 84, 92?
Yes
No
Does chroma signal
appear at IC301-29?
Yes
Replace VDR PCB.
Check 5V line.
Check IC501, and
replace if necessary.
Check IC501, and
replace if necessary.
Check R342, and
replace if necessary.
Replace IC301.
Replace IC301.
Check 5V line.
No
Does X301 (4.43 MHz)
generate a signal?
Yes
Replace IC301.
3 - 10
No image during recording
No
Does E-E signal appear?
Yes
Is 5V supplied to
No
IC301-4, 22, 47, 50,
52, 60, 84, 92?
Yes
No
Does image appear
during playback?
Yes
No
Does REC RF signal
appear at IC301-86, 90?
Yes
Check cylinder motor
and connector.
Replace X301.
See "No image in
E-E mode" in
(4) VIDEO circuit.
Check 5V line.
Check playback mode.
Replace IC301.