NEC 6 head HiFi VCR

[Raymond Smith]

Any suggestions appreciated: NEC VCR 6 head Hi Fi: VH-602. The model number
probably only applies to the Oceania region. We do not have FCC numbers!

The sound is ok, the picture is b/w and very snowy (as if it needs a head
clean) and also exhibits tracking faults. I've tried to attend to both
these areas, with no success. Tapes recorded on different machines give the
same result.
If I record a tape on the machine, I still get the same result on playback.
The strange thing however, is that the recorded tape will play OK on a
different machine. Weird!

Couple of more things; the real time counter does not work. I've been told
that it never did (doubtful). This was not an intermittent fault. One day
fine: the next day problem.

I have also cleaned the audio/control head.

Suggestions welcome.

Ray S.

 

[oldfogie]

Any suggestions appreciated: NEC VCR 6 head Hi Fi: VH-602. The model number
probably only applies to the Oceania region. We do not have FCC numbers!

The sound is ok, the picture is b/w and very snowy (as if it needs a head
clean) and also exhibits tracking faults. I've tried to attend to both
these areas, with no success. Tapes recorded on different machines give the
same result.
If I record a tape on the machine, I still get the same result on playback.
The strange thing however, is that the recorded tape will play OK on a
different machine. Weird!

Couple of more things; the real time counter does not work. I've been told
that it never did (doubtful). This was not an intermittent fault. One day
fine: the next day problem.

I have also cleaned the audio/control head.

Suggestions welcome.

Ray S.

Since a tape recorded on that machine plays ok on another VCR, I would

think that the playback problem isn't associated with the heads. Maybe in
the playback electronic circuit, or RF modulator. Though I don't think that
would affect tracking. Could be 2 different problems.

 

[klasspappa[remove]]

check for loose things!

 

[Guest]

check for loose things!

Sorry, I forgot that this is a 6 head, so the problem is probably the play

head, could be damaged, or just not cleaned good enough.

 

[b]

Any suggestions appreciated: NEC VCR 6 head Hi Fi: VH-602. The model number
probably only applies to the Oceania region. We do not have FCC numbers!

The sound is ok, the picture is b/w and very snowy (as if it needs a head
clean) and also exhibits tracking faults. I've tried to attend to both
these areas, with no success. Tapes recorded on different machines give the
same result.
If I record a tape on the machine, I still get the same result on playback.
The strange thing however, is that the recorded tape will play OK on a
different machine. Weird!(snip)

I repaired an NEC vcr (2 head mono though) about 4 months back where
there were weird things happening to the playback pic. Turned out to be
a secondary board mounted on the right hand side of the machine, the
luma/chroma/signal processing section, had loose connections where it
joined the mainboard. You may want to try gentle prodding about and see
what gives.

Possibly borderline caps in the head amp also? although that seems
altogether less likely.
Ben

 

[Dunno]

I repaired an NEC vcr (2 head mono though) about 4 months back where
there were weird things happening to the playback pic. Turned out to be
a secondary board mounted on the right hand side of the machine, the
luma/chroma/signal processing section, had loose connections where it
joined the mainboard. You may want to try gentle prodding about and see
what gives.

Possibly borderline caps in the head amp also? although that seems
altogether less likely.
Ben

The problem is the video head. The heads are almost gone. The signal
recorded is weak. It plays back on another machine as the heads on the
other machine can pick up the signal whereas the NEC machine cannot.