Identifying an spanish clone of a an Arcade chassis.

Severinoworkshop

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Identifying an spanish clone of a an Arcade chassis.

I live in Spain, and here the information is close to none when arcades are involved, many companies closed and information about their products is impossible to found.

Recently I received a gift from one of the small-town shop, an arcade cabinet with a 20" monitor, several joysticks, pcb's, etc, stuff they would have throw away and I was happy to give it a try and restore the cabinet.

My main goal was to get the monitor working and start from there, but, I've found that the chassis was made in Spain in 1984, the company who made them closed several years ago, so no schematic or service manual.

The chassis is this:


It was made in 1984 in an Spanish workshop called "Arfyc-Dymel".
Since most engineering decelopments consist on copy a working one and put it all in a new pcb, here are (I think) the details tha could give away the original chassis this one is based on:

Power supply -> Switched mode, using TDA-4601 and a smps transformer (HR9660) with a bu508A in a alluminium heatsink. (The power supply follow the datasheet of tda4601 in circuitry and values)

IC's for vertical and horizontal -> TDA2593 and TDA1170SH.
Flyback -> second generation, white in colour and full enclosure, focus and screen potentiometers.
Horizontal output transistor -> BU508A (TO-3 type) )also a TIP125 attached to the heatsink)
Transistors used in RGB amp -> buffer with to-92 (BC558B, BC557B) and two TO-202
(BF869S) in each color output to the CRT.

I've been attempting to repair this chassis on my own. Some fuses got blown, anothe resistor was shorted, I changed all electrolytical capacitors with new ones and some signal could be seen.

Later I unplugged all to see why the focus knob on the flyback had no effect at all and everything went downwards, now There is HV on the tube but the filaments won't glow, also I have to point out that in moment of crazyness I soldered the emitter and the base of the HOT wrong, e-b and b-e. I have a spare part for this trt, but since the filaments don't work I will have to start with the power supply. And I guess the less afected component must have been the HOT, it seems OK, but the filaments won't turn on.

If anyone has a list of pre-1984 chassis, It would narrow my search and maybe, maybe I could find some schematic resemblance with a more known arcade monitor.

By the way I've found silimarities between this one and early atari monitors, in that the HOT is located on an alluminum side, the rgb video amp and preamp are on a different PCB, but most of all, this chassis is different from anyone I've seen until now because the CRT pcb only has a resitor and a capacitor.
For more detailed pics, here is the TDA4601 (I think that works the power supply:)


The RGB pre/power amp is in a different board, here it is before the cap job:



The TDA2593 is in this PCB:


The TDA1170SH is in this PCB:


The flyback: (Code GSD-0001)


The windings and the HOT is on this side of the yellow-ish alluminum heatsink.
The black plastic covers the BU508A, and in the corner there is a screw that is for a TIP125, It got hot fast, I replaced for a new one and It seems the new one blew with some voltaic arcs on the pins.

Anyway. I have plenty of crt (TV's) to fit in the cabinet, but repairing this chassis is a bit of a challenge to me, lets see if I can find help in this forum.

Thanks.

PD: I use a VIDEOCOLOR A21-421x CRT, 20". Just in case this is relevant.
 
Wow, that thing almost looks like something that NSM would have put together back in the 80's. Although I dont know if they ever built video game monitors (they were a Jukebox manufacture).

I know that part of the fun is to revive old hardware but that might be too much to take on. Especially if the flyback is bad. Without schematics thats going to be a lot of work.
 
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