Thanks for the advice.

I checked this voltage earlier and if my memory serves me correctly, it was
around -17v.
I will have to check that voltage again.
There was a small transformer on the PCB that looks like it is used to
generate this voltage and it had a 22 micro 50v cap on the output, which I
changed.

-Jan

"Arfa Daily" wrote in message
...

"Jack" wrote in message
...
The FL display is very dim on this unit.
I replaced all three electrolytics on the display board, but it did not
help.

Any experience on these??

-Jan



I take it that it is 'evenly' dim ? Have you checked the negative supply
volts ? Should be around -29v. You can check it between chassis, and the
filament pins at one or other end of the display panel (the AC filament
supply is normally 'floated' on the DC supply, so it's a convenient place
to check it). I'm not sure how the voltage is derived on that model, but
often, it comes from a voltage multiplier or an AC coupled transformer
winding. In either case, it is usually the coupling electrolytics that
cause the voltage to be low. I have also seen Sony use AC coupling on the
filament supply. One particular tape deck of theirs, used to suffer
regularly from the caps failing and making the display dim. Unfortunately,
if the problem wasn't caught early enough, it used to do damage to the
panel itself. If it is a switch mode power supply, it will be derived
direct from a winding on the switching transformer.

Just as a slightly separate thought - the machine hasn't got a fluorescent
display "dim" or "off" function in the user software, has it ? I've been
caught by that more than once ... :-)

Arfa