MORE BLOODY TIMEWARP ISSUES

[ddstoys]

Why do all the love jobs end up being a nightmare LOL

   Well time warp had been working 95% everything except the sound.   On friday the boys were having a few games when the displays all went dead.   Turned the game of then on and id lost my high scores and freeplay setting ive tested the batteries to be ok and making good connection.  And now whenever i try to add credits the attract mode locks up leaving whatever lights were going lit.   Any suggestions ?

[Strangeways]

Dropping its memory would suggest batteries, but the game would boot to the audit mode.

Have you replaced the 40 pin interconnects and replaced the ROM sockets ?

[ddstoys]

Thanks Nino
               No it doesnt boot to audit mode interconnect board plugs have been replaced on the Driver board but not on the CPU was the only working board on the game and hoped to not have to touch it LOL.

   Looks like it will have to come out Thanks Nino

Looks like it wont be leaving anytime soon   

[Strangeways]

Thanks Nino
               No it doesnt boot to audit mode interconnect board plugs have been replaced on the Driver board but not on the CPU was the only working board on the game and hoped to not have to touch it LOL.

   Looks like it will have to come out Thanks Nino

Looks like it wont be leaving anytime soon   

I'd at least try the interconnects first. Even reseating them might "fix" the problem. General rule of thumb with sys4/6 - replace interconnects and the 5V cap on the power supply.

[pinnies4me]

Daniel, let me know if you want to test the sound board in my game to rule anything out/in.

[Retropin]

Sounds like you have a signal fault as in data being lost and so MPU locks. It COULD be 40 pin connector, but pulling this out is a lot of work and if not necessary, its tempting to avoid it.

You can retension the female side with a small screwdriver and as sacriligious as this sounds a light spray of CFC on the male. Put back in place and if symptoms are no longer then this is your fault area. Of course it doesnt fix it, but it does determine the fault. if its not here, then spray connectors with electronic cleaning spray to clean up.
make sure also that signals from PIA chips are above 3V. Ive had PIA gradually die on me and under this voltage is not seen as logic... game will just freeze due to low logic signal.

And yes - as nino states... 5V logic cap... check for RIPPLE!!!!

[FirePower]

If you've already done the driver board side of the interconnector,  I'd have a really close look at the cpu male side pins and clean these with some very fine wet and dry, used dry.  I'd also examine the solder connections of the males under bright light with good magnificiation and maybe reflow them before total replacement - the males shouldn't be that troublesome.  I'd also examine and swap if socketed the 5101 and 6810 memory chips that are just to the right of the rom chips.
 

[ddstoys]

Well ive replaced the interconnect on both sides and all the sockets to the 40 pin sockets to the PIAs and reflowed all the pins.  So i decided id plug them back in and see how i went.   Turned it on and the game booted    Clocked up a credit and wham it froze again 


   Almost gave up for the night when i decided id re seat the CPU as its a dirty old looking chip and the game fired to life clcoket up credit and played a game until 2nd ball when the ball eject blew the fuse LOL

At least its going again lets hope its just a crook eject coil and thats what stuffing the sound aswell but thats for another day having one last JW can then going to bed

[Retropin]

   Almost gave up for the night when i decided id re seat the CPU as its a dirty old looking chip and the game fired to life clcoket up credit and played a game until 2nd ball when the ball eject blew the fuse LOL

  You  let us all exercise grey matter over possible causes and all the time you were looking at a really grubby CPU chip that wasnt seated right??


Oh Daniel.......Oh Daniel......   

[pinnies4me]

You  let us all exercise grey matter over possible causes and all the time you were looking at a really grubby CPU chip that wasnt seated right??


Oh Daniel.......Oh Daniel......   

 

[ddstoys]

Well turned it on this morning and its all stuffed again im going to order a new CPU for it and see how that goes.

Man i love EMs 

[Retropin]

Is it a 6800 CPU??? Think i have some new ones here... happy to post one

[ddstoys]

Yeah Gav it is the 6800 if yu have a spare that would be great

[humpalot]

I'd be checking and replacing the sockets, if you haven't already done so.  These normally have crap sockets.

[Strangeways]

I'd be checking and replacing the sockets, if you haven't already done so.  These normally have crap sockets.

Yep - CPU AND ROM sockets.

Sys4/6 machines need these manditory repairs. Intermittant problems cease if you replace the 40 pin interconnect, all sockets and the 5V cap on the power supply. 2 - 3 hours work.