Sharp Famicom C1 TV Repair

[Tw3ek]

Hello!

I am working with a Famicom TV that does not want to turn on. I suspect the transformer has gone bad. Does anyone here happen to know what the voltage into the transformer (not the flyback) is or the part number for both the flyback transformer and the power transformer? Thank you very much!

[Pikkon]

I bet a service manual exist but finding it would be very hard.

Did you check for any shorts in the power supply section?

[Tw3ek]

I bet a service manual exist but finding it would be very hard.

Did you check for any shorts in the power supply section?

I have narrowed it down to a problem with the original transformer there, open primary winding. I was hoping to find a replacement for it to test for other issues, but there is no information regarding the part and the output that I can find

[Pikkon]

Good that you found the problem but I wonder if you could find someone to repair the transformer,possibly having it rewind.

[Tw3ek]

Good that you found the problem but I wonder if you could find someone to repair the transformer,possibly having it rewind.

I have been trying to find someone for about 2 weeks now with no luck, I assume it being a smaller transformer has a lot to do with that. If anyone knows anyone, please let me know!

[FAMICOM_87]

I have narrowed it down to a problem with the original transformer there, open primary winding.

just check the wire it sold be disconnected on the soldering point on one of the legs so can be fixed Here is my experience with little transformer in one voltage regulated adapter

[emerson]

I had a similar experience where the transformer inside my Eico 232 VTVM had an open primary winding. As famicom_87 said my transformer had also opened right where the magnet wire was soldered to the external connection. Once I had the laminations and paper removed I simply unwound a single turn and reconnected it bringing the transformer back to life.

If you know the transformer is dead then it's worth learning how to repair it yourself. It's tedious but very rewarding work. Just ensure the insulation on the primary windings is not burnt and flaking off.

Keep in mind that a fried transformer could indicate another component downstream in the circuit has also failed causing the transformer itself to fail.