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Jet Fighter *ATARI anno 1975* *Restoration*

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Thzarr:
Jet Fighter
Atari Arcade


Anno 1975


Info: 
http://www.arcade-museum.com/game_detail.php?game_id=8232
Download  Jetfigher Service Manual incl schematics etc.
http://www.arcade-museum.com/manuals-videogames/J/JetFighter.pdf

The 19" B/W CRT service manual -  pm me


I have this arcade standing in my livingroom. Sorry, I have to say its not in mint condition ;)

PL1:
Welcome aboard, Thzarr.

Are you planning on doing a full or partial restoration?


Scott

Thzarr:
Short Briefing:

At startup, you directly hear engine and blast sounds coming from the speakers.
Actually its starting right in a ongoing game. Weird.
When the game is over, its enter attract mode, and the speakers are silenced.
But the two startbuttons backlighting, its on. ready for a new game.
And no coin have been inserted.  the coin counter is to hot to touch.
Its being feed by constant voltage insted of pulse to activate the coincounter.
Something is very wrong.

According to the manual a normal startup should be directly in attract mode and no sound at all.
Only when you start a game the sound starts.

***************

A loose connector cause a burned gnd edge contact. I solder the gnd cable to the PSU caps gnd.

The Game.
2 player.
White plane=1st player
Black plane= "Computer" or 2nd player.

The White plane could only turn right and fire w/ sound and explosion but no visible missile.
You have no chance to win the game.

Thzarr:
pics

ChadTower:



I would start by verifying the voltages both at the beginning near the power supply inputs and at the end of processing.  Sadly, debugging this game is probably going to be a game of TTL cat and mouse.  Fortunately those TTL chips can usually be tested by themselves using a DMM. 

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