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Mitsumi 68-4242a

Repairs & upgrades.
Tomswork
Posts: 776
Joined: 22 Nov 2019 22:05

Re: Mitsumi 68-4242a

Post by Tomswork »

Just a power supply question the 120v psu do they use the sam capacitor on the low voltage side as the 240v ones

Tom
MacTech05
Posts: 69
Joined: 07 Jul 2022 01:21
Location: USA

Re: Mitsumi 68-4242a

Post by MacTech05 »

What is the difference between the SR97 and SR98 PSU for the Atari ST/STF/STFM/STE? I know in the USA, the SR97 PSU is used for 120V Atari ST.
Is the SR98 the 240V model for Europe?

I recapped my SR97 and replaced the Bridge Rectifier. However, Mr Koda at Best-Electronics in San Jose, California, USA told me I should also replace the power resistors. I can not find a schematic for the SR97 PSU, but I did get a schematic for the SR98 PSU.

I noticed the model on the PCB on both the SR97 and the SR98 the number 68-4242A.

If I am correct, the SR97 and SR98 should have different component values depending on whether the model is for 120 V (USA) or 240V (Europe). Or are the component values the same for both?

Thank you.
Randy

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