The NEW Build Your Own Arcade Controls

Main => Monitor/Video Forum => Topic started by: Anton on January 05, 2020, 11:50:10 am

Title: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: Anton 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

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: perjmolsen on January 07, 2020, 04:59:14 am

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

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: Anton 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

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: Anton 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 ;-)

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: perjmolsen on January 08, 2020, 08:54:29 am

Super, nice work and good information  :cheers:

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: tuffjam 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

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: Anton 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

Title: Re: Photoplay CRT monitor Tatung --> degauss PTC info needed
Post by: tuffjam 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..  :)