Atari Centipede Cocktail table game has no power

Arcade Collecting > Restorations & repair

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vapuser:
Good morning all, after removing the monitor from the chassis and taking a good look around I did notice another smaller fuse. See Pic below circled in red. I believe it’s the F901, 1 AMP 250V. I tested it and that fuse is blown. It doesn’t look like it’s in a socket. Is that fuse soldered in place? It actually looks like both fuses are soldered in place. I can’t image having to de-solder and re- solder a fuse when it blows. Has anyone ever had to replace that mini fuse? If that is a specialty type fuse, does anyone know where I can purchase it? With the Monitor schematic now in-hand, (Thanks again to yotsuya :cheers:), I believe what previously looked like a bad chip is really a side pin Transformer (T1503). See additional pic below. Also looking at the schematic for my 13” (SU1103A) monitor, and please correct me if I’m wrong, but it looks like the B+ is tested from the B1 pin and adjusted at R909. we’d be looking for 120V DC reading. I really want to order and replace that fuse first. I may not see a voltage without it. Any comments? Have a good day.

vapuser:
See pic below, circled in red, showing blown mini fuse.

vapuser:
See pic below showing a better angle of the, what I believe to be, the Side Pin Transformer (T1503).

yotsuya:
I’ve changed that fuse many times, believe me.

You can find them here, buy a few of them:

https://www.arcadepartsandrepair.com/?s=G07+fuse&post_type=product

Quite a few collectors will add an inline fuse holder here, running wires to this spot and mounting it off to the side.

bperkins01:

--- Quote from: yotsuya on March 04, 2020, 07:07:27 am ---Quite a few collectors will add an inline fuse holder here, running wires to this spot and mounting it off to the side.

--- End quote ---

I would to this ^^^

Add a fuse holder so the fuse is not soldered to the board.
You can get a 1A / 250v at a hardware store.. its very common. There is nothing special about it. Its a standard fast blow fuse.
Since you don't (really) know what blew it... A fuse holder and a few spares makes sense.
Then once you get it all sorted out - if you want to make it *original* again.. Do the solder on the board fuse..

That little transformer is likely fine.. They don't normally die..

I looked in the manual (B1 = B+) in your case..

Keep in mind its 120v DC The very first time I saw the 120 and just set my meter to AC.. (wrong..)

That fuse is really early in the circuit too.. Maybe it blew as a result of the power supply? Not sure..
Keep at it!

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