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About this blog

This is just a blog for me to store my repair logs. I think it would be useful to others here if I post them as I am doing more arcade and pinball repairs.

Entries in this blog

Donkey Kong #2 - really quiet sounds

Symptoms - VERY QUIET audio, was barely audible with my audio amp all the way up Solution - There was a single burnt resistor, R13, which was just a 1k ohm resistor. After replacing that and the damaged capacitor that was next to it. The resistor is connected to the 5V rail, so based on the fact that it burned up makes me question whether or not the power rails were swapped around on accident. I got half a hacked harness in the box, so that further supports this theory.  Anyway,
SNESNESCUBE64

SNESNESCUBE64

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Arcade Monitor Repair

Sanyo 20EZ Chasis - Burning up R471

Symptoms: 20EZ losing high voltage and is burning up the resistor R471 and was blowing the 300mA fuse. Solution: replaced the burnt resistor, checked the HOT to make sure that was still good. HOT tested bad, so replaced with a NTE89. Fired it back up again, same results. Afterwords I swapped the flyback as that can cause the same issues (and I had one off a working chassis on hand), this solved the issue. Chassis is now working just fine and is ready to roll again.
Arcade Repair

Donkey Kong - garbage on screen

Game - Donkey Kong Symptoms - Garbage on screen. It boots to the highscore table, but full of junk. From there it moves to the attract mode but mario falls below where he's supposed to be, game resets, and repeats this process. (Ignore the inverted color in the first picture, I didn't have an inverter board on hand). Solution - The board was originally missing stuff and had previous work (it was an 'untested' special on ebay). The previous work looked fine so I could start. I fig
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