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Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Message

Re: Sh-101 problem

2008-04-03 by inocencio66

--- In vintagesynthrepair@yahoogroups.com, Philip <eggwheatis@...> 
wrote:

> The service manual isn't too great I agree, but I can
> see +9 fed in externally then the internal psu
> generates +5, -5, +15, +14, with all the points marked
> on the schematic.

> 
> Phil.

One more thing: Where exactly are the cheking points for the +5 and -
5? (Assuming +15 and -14 are for the synth section only)I can only 
see a +5v mention next to vr1. 

I may be misinterpreting some symbols in the shematic and wouldn´t 
want to read/adjust voltages with the voltmeter connected to the 
wrong side of a resistor or something... All I could measure well so 
far were +4.8v at cpu chip´s pin 40.

Thank you.

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