Hello,
I have a JVC AV-29SX1EK with a blue picture. Picture and sound are fine
excepy there is no Red or Green. Anyone got any tips where to start looking?
I have the service manual, but need some start points.

Thanks in advance.

Michael.

Start at the picture tube cathodes and work your way back from there.

These sets generally don't have many faults in the picture processing but
the subsequent models had a lot of trouble with faulty tube guns in the
Philips tubes they use.

Its possible there is a short keeping the blue gun from cutting off and
hence throwing the balance to lose red & green.

Try tapping the neck of the tube whilst its running... use your judgement
about how strong- so as not to break the glass!!
This may clear the fault either temporarily / permanently.

Beyond that you'll just have to scope the drives to see if there is an
electronic fault.

regards
AW

thanks- i'll let you know how I get on.


"Cliff Top" wrote in message
...
These sets generally don't have many faults in the picture processing but
the subsequent models had a lot of trouble with faulty tube guns in the
Philips tubes they use.

Its possible there is a short keeping the blue gun from cutting off and
hence throwing the balance to lose red & green.

Try tapping the neck of the tube whilst its running... use your judgement
about how strong- so as not to break the glass!!
This may clear the fault either temporarily / permanently.

Beyond that you'll just have to scope the drives to see if there is an
electronic fault.

regards
AW