Aero Fighters Repair Logs

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Repairer: GameDude
Forum Thread: Aero Fighters PCB Repair

Ebay stikes back!! Got this board of an Ebay buy and seller.. claimed it was perfect but when tested PROPERLY I could not coin the game.

TEST mode showed all inputs working except coin 1 was being held low. Hmmm probed the inputs and the COIN 1 was definatly low, traced back to the LS244 chip and after probing that noted that the input was pulsing but the output was low (shorted internally)

This is quite common and is usually because of coin mechs/coin counters that have no diode to ward of spikes most owners dont even know what the danger is. A short or spike is all it takes to knock out an input.

Anyway desoldered the chip and replaced with a new off the shelf chip in a socket and wallah it all works. So much for TESTED 100% on Ebay.... BAH! ****ers... Least it was an easy fix. STATUS :- FIXED

Repair Logs converted to wiki format by Brad from Aussie Arcade.



Repairer: Apocalypse
Source: Aero Fighters - Video System 1992 (repair log)

Game booted with garbled graphics and only blue colour was present.
ApocAF 1.JPG
I quickly found RAM U16 (type 6264 narrow) was extremely hot. I replaced it and graphics were restored but still blue only.
ApocAF 2.JPG
Starting from the edge connector I probed the board backward: no activity on the green and red pins of the edge connector, then no activity on the resistors used as DAC, and finally no activity on the outputs of one of the two LS273 used for colours. Input pins had activity as it should, clock seemed valid so as master reset. I pulled it and installed a new one, colours were back:
ApocAF 3.JPG
ApocAF 4.JPG
Game fixed.