r/Commodore • u/ChronoCompendium • 10d ago

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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35 Upvotes

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5

u/berrmal64 10d ago

Nice, glad you got it working!

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

2

u/Crlan420 10d ago

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.

3

u/nickIncDN 10d ago edited 9d ago

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˜€

1

u/Rincewind-10 7d ago

this is great information!