Re: Battlezone - no vectors in game

Thanks for your reply Sott,

I forgot to mention that I have replaced every single socket on both
the AVG board and on the AUX board. Also as the fluke tests all of the
roms in circuit, more than once as good, I'm reasonably confident that
it is not the roms that are the problem

Thanks

Luke

> Luke, I think I may be able to help. Did you check or replace the
> actual ROM sockets. My
> BattleZone cabaret had a similar problem and I traced it back to a lone
> PROM socket that
> would just get finicky from time to time. You're correct about the
> game running though, since
> I could also get it in diagnostics mode, hear the tank rumbling, etc,
> just no video. Another
> thing you may consider after replacing all of the PROM sockets is to
> just do the hack that
> does away with most of the PROMs. An easier solution is to buy the
> BattleZone high score
> kit, since it also does away with all of those PROMs and doesn't
> require any hacks. I've
> also found it is a great diagnostics tool itself (for both BattleZone
> and Red Baron).
>
> http://www.brasington.org/arcade/hs/bzone/
>
> Scott C.
>
> lists@arcadeuk.com wrote:
>> Hi everyone,
>>
>> I'm new here, been collecting/repairing raster games for 8 years,
>> new to vectors.
>>
>> I have a nightmare of a Battlezone cabaret to sort out.
>>
>> 1) Game arrived dead. - Fixed a clock problem, rebuilt AR2 and
>> changed some bad sockets to turned pin and the game sprang to life,
>> though none of the inputs would work (in test mode or game) -
>> traced the problem to a bad pokey and latch
>>
>> 2) Game completly died - no vectors in test mode or game, also the
>> monitor died during the no-vector problem so now I have a scope
>> hooked up in the cab for display - I will come back to the monitor
>> later - but I want to get the game board working 100% first.
>>
>> 3) Moved the game board to the test bench - resoldered some dry
>> joints, also resoldered the pin strips for the aux board, and made
>> a new aux board cable. With the game on the bench I got the game to
>> fire back up again (could see attract mode and highscore table
>> etc) so I moved the game boards back down to the cab, so I could
>> test the controls see (as I have no controls wired up on the test
>> bench) When I fired up the game, the screen (scope) was blank,
>> stuck the game into test mode and the game now bleeps when I press
>> any controls, so the controls are working, also if I stick it into
>> game mode, the start button flashes, and if I press the start
>> button, I get a rumbling noise for about 10 seconds, then it
>> stops, and the start button is flashing again, and you can press
>> it again .. etc etc. The screen (scope) is completly blank in both
>> test and game mode still...
>>
>> 4) Moved back to the test bench, I can now get the test mode screen
>> up again on the scope, but there is no vectors in game mode. I
>> have noticed that if I switch from test mode to game mode, the
>> vector generator section of the AVG pcb completely stops (i.e.
>> there is no activity at the vector rams and roms) but if I switch
>> on test mode then there is activity.
>>
>>
>> Things I have checked :-
>>
>> Voltages are correct on all the test points both on the test bench
>> and in the cab (+5, +5DAC, -5, +12, +15, -15 etc)
>>
>> I have a fluke 9010A and both the program ram and vector ram check
>> out ok (eash tested at least 5 times in a row!)
>>
>> All roms produce the correct signature in the pcb (using the fluke)
>> and also all check out ok in my eprom programmer)
>>
>> When in game mode (screen blank) the cpu is running, not
>> watchdoggins, and the cpu rams and rom have activity, but the
>> vector rams and roms do not.
>>
>>
>> Anyone got any ideas what might be causing the game to have a blank
>> screen (no vector generator activity) when I switch to game mode,
>> but it is ok for the test screen?
>>
>> Thanks in advance for your help
>>
>> Luke
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Received on Sat Aug 18 14:36:20 2007