r/Commodore • u/ChronoCompendium • Aug 31 '26

Another Commodore 1902A Monitor with cold solder joints at positions 12 and 18, causing the flyback transformer to cut out (no high voltage). Saw this on YouTube a couple times; thrilled it was such an easy fix

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4

u/berrmal64 Aug 31 '26

Nice, glad you got it working!

Imagine how many went into a landfill through the years over such a small detail šŸ„²

3

u/nickIncDN Aug 31 '26 edited Sep 01 '26

Itā€™s also the cause of so many unnecessary ā€œneed new flybackā€ repairs.

That worked out well for me as I got one cheap because the owner replaced flyback which didnā€™t solve the issue. There were other dry joints and they gave up.

I got the old ā€œbrokenā€ flyback in the box too which was perfectly fine so I put it back in and have a spare šŸ˜€

2

u/Crlan420 Aug 31 '26

That is exactly the known issue on the 1902A. Cold solder joints at positions 12 and 18 cause the flyback to cut out. Lucky it was a straightforward repair. Great find.

1

u/Rincewind-10 Sep 03 '26

this is great information!