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and that I used the same power supply.
TS-2068-ONE has no color but does black and white cartridges just fine.
TS-2068-TWO shows vertical bars and other video failure symptoms.
Checking for the powersupply:
http://www.old-computers.com/museum/com ... st=1&c=634
says "DVE power supply, 15 V at 1 Amp DC, and with the outside sleeve of the plug positive and the inside negative."
Also asking someone locally here about their power supply...
In contrast, the Spectrum failed when I used 12V so I went to a 9V 2A switching power supply.
I was getting ready to wash in the dishwasher or replace all the caps.
Fixes Apple Macintosh boards from cap leakage. See YT videos.
What is your PSU's voltage reading, from your multimeter's view? Maybe your PSU have a problem with blown diode(s). Does your PSU smell burnt? Do you have an oscilloscope?
I have my TS2068 and a PSU with its label. DVE Model No. DV-141A "FOR USE WITH COMPUTER".
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After a few minutes of using a search box, I also found the schematic with its lines cleaner. And only a page.
However, we still can use both of these drawings.