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Author Topic: Photoplay CRT monitor Tatung --> degauss PTC info needed  (Read 580 times)

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Anton

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Photoplay CRT monitor Tatung --> degauss PTC info needed
« on: January 05, 2020, 11:50:10 am »
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

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Anton

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #2 on: January 07, 2020, 10:02:29 am »
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

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #3 on: January 07, 2020, 02:31:31 pm »
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

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #4 on: January 08, 2020, 08:54:29 am »
Super, nice work and good information  :cheers:

tuffjam

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #5 on: January 09, 2020, 01:46:38 pm »
Hi anton.. where did you get the schematics for your monitor?

I have a 19" TATUNG VT19726Z which is out of a megatouch force and need the schematics for it.

Thanks

Anton

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #6 on: January 12, 2020, 06:25:48 am »
Hello Tuffjam,

I visited so many sites looking for info that I don't remember where I found the schematics. Sorry!

Anton

tuffjam

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Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
« Reply #7 on: January 16, 2020, 09:50:07 pm »
ok no worries... if you ever come across the site do let me know and save it in your favs in case anyone else asks..  :)