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Photoplay CRT monitor Tatung --> degauss PTC info needed
Anton:
Hello,
Managed to fix the CRT monitor chassis of a Photoplay cabinet.
- Recapped C614 (2.2uF 100V) C1 (220uF 25V) C106 C705 C720 C704 (100uF 35V and 50V) --> fuse still blew
- Changed the Flyback (the old one looked burned, deposits where on the heatsink next to it) --> fuse still blew
- Changed the faulty bridge rectifier --> fuse still blew
- Took out the PTC --> monitor worked!!
But brightness control not working, need to replace Q807 / Q808 (2SA1015) because one of them tested NOK.
Now I have a working monitor with strange colors.
PTC id: NICHIAS 180N271 910. Cannot find any info, any ideas for a cheap replacement part?
Degauss coil reads 11 Ohm
Thanks,
Anton
perjmolsen:
Hi
To clear up the colors, you just can use a degaussing wand
https://www.aliexpress.com/item/32639744634.html?spm=a2g0o.productlist.0.0.1b0e6bcaBZwKNi&algo_pvid=ad51bbac-d5b3-4cb7-a3b5-bf56a3da79c3&algo_expid=ad51bbac-d5b3-4cb7-a3b5-bf56a3da79c3-1&btsid=360a4388-97f2-447d-85ff-5ed960ac8f69&ws_ab_test=searchweb0_0,searchweb201602_6,searchweb201603_53
Anton:
Hello Mr/Mrs Molsen,
Thanks for your reply.
I know but I would rather have it degauss automatically like it did originally. Perhaps I will try to find an old PC CRT screen and see if I can pull a PTC out of it.
Still... suggestions are welcome.
Anton
Anton:
Hello,
Today I compared the PTC of the Tatung with the one from my WG monitor and except from the values they did not differ much. So I soldered the 'faulty' PTC in the Tatung chassis again and after powering up the degauss worked and the colors are perfect again. Seems I made a mistake....
topic closed ;-)
perjmolsen:
Super, nice work and good information :cheers: