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PSU repair issue DVE DSP-508A for Atari STFM

Tool suggestions, soldering tips, general useful electronics knowhow.
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Wes_T
Posts: 5
Joined: Mon May 26, 2025 9:50 pm
Location: Portsmouth UK

PSU repair issue DVE DSP-508A for Atari STFM

Post by Wes_T »

Hello

I have a issue with psu DVE DSP-508A. I cant find right resistors described as R5 and R6.
Part list is incomplete.R5 50??? R6 1/4watt? On board was 2watts 3.3kohm.
I removed old ones (looks burnt) one is 47kohm next 330ohm (on ohmmeter)
At this moment im totally confused. Please advise.

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Best regards
Wes_T

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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frank.lukas
Posts: 763
Joined: Fri Jan 19, 2018 11:52 am

Re: PSU repair issue DVE DSP-508A for Atari STFM

Post by frank.lukas »

Both measured values ​​are correct and also match with the color code. The list/BOM is incorrect I think ...

Do you really have to replace the two resistors?
Wes_T
Posts: 5
Joined: Mon May 26, 2025 9:50 pm
Location: Portsmouth UK

Re: PSU repair issue DVE DSP-508A for Atari STFM

Post by Wes_T »

Thank You
Not yet i will order them soon. I just need to be sure.
So that should be 2watts, 47kohm and 330ohm.
Best regards
Wes_T

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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frank.lukas
Posts: 763
Joined: Fri Jan 19, 2018 11:52 am

Re: PSU repair issue DVE DSP-508A for Atari STFM

Post by frank.lukas »

There are R4 and R20 ...!
Wes_T
Posts: 5
Joined: Mon May 26, 2025 9:50 pm
Location: Portsmouth UK

Re: PSU repair issue DVE DSP-508A for Atari STFM

Post by Wes_T »

Ok. R4 on manual is described as 3300ohm
This one i measured one is 333ohm, coulor code looks like 330ohm (photo)
R20 47kOhm, ok

On photo you can see how this is described on the board.
Board is rev.0
Probably i have different material specification. But is described as for DSP-508A
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Best regards
Wes_T

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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