NEC FS4620PI 18" CRT TV no picture

[reTrieV]

Message from CRT TV owner. Can anyone shed any light on this?

Vacation switch?

Hi James

It’s an old 18 inch NEC, model FS-4620PI.

Like I say it was working until I kind of took the back off because I thought it was the power button not engaging, then my wife said about the ‘vacation switch’ on the back. Like an idiot I thought ‘on’ was for when you went on holiday not the actual on/off switch. I put it back together and makes all the right noises and has static on the screen but no picture. I twiddled the brightness, contrast etc but nothing. Well it does flash white in the corners for a second when switched on.

I hope you can help, I really want to get it fixed. I’m willing to travel etc. Thanks James.

[hot soldering iron]

Hi James,

Sounds from the description that the EHT is there. I presuming the source ie freeview box is working ok? If it was me, I would turn up the A1 control on the LOPTX to see if the CRT is being scanned (should get white raster with flyback lines when A1 advanced). It could be a frame fault (maybe) or no G2 volts ??

[Evan P]

What part of the circuit does the switch connect to ?
I do hope this set wasn't designed such that it could work in the USA and the switch is for 240/120v operation...
Eeeek

I also wonder if this set has a switched 12v operation input...?
That too could account for the vacation switch.
(more likely since the set is still semi functional)