Bomber Man World repair log

 PCB Repair Logs  Comments Off on Bomber Man World repair log
Feb 072018
 

Received from Portugal a batch of faulty PCBs for repair, there was among them this Bomber Man World (on Irem M97 hardware)

The PCB was working fine except for the sound, you could only hear some scratchy noise and also video output was affected showing some kind of disturbs:

This is scenario I faced many times during repairs and the cause was always the same : the electrolytic capacitors.In particular Irem boards suffers from the “brown ELNA” syndrome and this was not an expection.I  went to measure capacitors with my ESR meter starting from the 470uF 25V one @C203 which filters the +12V routed to to sound amplfier.My meter didn’t display any reading meaning the measured ESR value was out of range (from 0 to 99 Ohm on my meter) 

Probing the +12V line with a scope confirmed there was some ripple (no longer filtered by this capacitor)

The out-of-circuit testing  confirmed the high ESR and bad capacitance :

Fitting a good capacitor restored loud and crisp sound.End of job.

 Posted by at 6:34 pm

Hammerin’ Harry PAL dumps & Warriors of Fate PAL dumps

 PAL Updates  Comments Off on Hammerin’ Harry PAL dumps & Warriors of Fate PAL dumps
Feb 072018
 

Today Hammy sent me 3 PAL chips.
We have one from the M84 Hammerin’ Harry, this one is very similar to the one we already have but it has a “-D” appended to the label ID. Next one is from the M72 Hammerin’ Harry and the PAL from Warriors of Fate on CPS1.
The Hammerin’ Harry ones have been tested by Hammy.

Thanks to Hammy for sending these.

 Posted by at 4:12 pm

Real Break – Billiard Academy PAL dump added

 PAL Updates  Comments Off on Real Break – Billiard Academy PAL dump added
Feb 062018
 

Today I dumped the PAL from a Real Break – Billiard Academy PCB (a pool game manufactured by Nakanihon in 1998).Device was an unsecured PALCE16V8.

 Posted by at 6:16 pm

PAL dumps update

 PAL Updates  Comments Off on PAL dumps update
Feb 042018
 

Today we have some new PAL dumps.

‘coolmod’, one of our finest contributors, sent in different dumps, all are untested since they come from not working PCBs.We had from him dumps from these boards:

  • Gals Panic 3.Devices were two PLDs in PLCC44 package : a ispLSI 1016 and a ispLSI 2032.
  • Namco System 11.One PLD dumped from motherboard.
  • Namco System 2.One PLD marked “SYS87B-2B” dumped from a CPU board of a Golly Ghost! boardset.This has slighly different equations than usual one marked “SYS87B-2” we had on database.
  • Quick Pick 5 , a slots game by Konami.Two secured PALs here, I reversed them into GAL16V8 fusemap.Picture of board:

  • VJ Dash1.2, a music game from Jaleco.Dumped one unsecured Xilinx XC7336 (PLCC44) PLD and one secured PEEL18CV8 (reversed by me into GAL16V8).Picture of board:

 

Artemio Urbina sent in dumps (from seven devices) from a Thunder Zone PCB, according to him these are specific to the Japanese ROM set so they may not work on other versions

‘chaneman’ sent in dump of a 82S153 device found on a Pengo bootleg board.He also send info on how to run on this board an unencrypted version of original Sega game code, you will find notes on database.

The user ‘undamned’ from Arcade-Projects forums dumped the PAL marked ‘D77-20’ from the Taito F3 cartridge ‘Kirameki Star Road’, device was an unsecured PALCE16V8 @IC37:

Lastly, I converted to GAL16V8 a BPROM found on a Black Tiger/Black Dragon PCB.Dump of the BPROM (a Fujitsu MB7114 marked ‘BD03’ @11K) was taken from MAME ROM set.GAL conversion was successfully tested by the Arcade-Projects user “rewrite” on his board which was missing this chip.

Thanks to all contributors.

 Posted by at 6:05 pm

Silent Scope Fortune Hunter DS2430 replacements

 General  Comments Off on Silent Scope Fortune Hunter DS2430 replacements
Jan 272018
 

I now have a way of creating new DS2430 replacements for a Konami Viper Silent Scope Fortune Hunter game.
I can only do Silent Scope FH at the moment but I might expand to other titles in the future if I get hold of the hardware.
The DS2430 has a unique factory lasered registration number which is used as part of the security of these things. As long as there is a good Timekeeper NVRAM fitted then the game will reinitialise it on this game and it does not seem to play a part in the security.

If anyone needs a replacement then get in touch and we can sort something out. I will need the ROM ID from a new DS2430 in order to make a new file.

 Posted by at 1:14 pm