In for repair is a Cave CV-1000 PCB where the colors are displaying dim with a yellow tinge. As per the PCB Encyclopedia, it is common for the three (U14=Red, U15=Green, U16=Blue) color amplifiers to fail on these boards. Testing the amplified output line of each amp on the oscilloscope quickly revealed a faulty Blue [...]
Kudos to Hammy for his expert advice of all things Namco System 11/12 for tutoring me on diagnosing this board. In for repair is a Namco System 12 boardset with the Arika game Fighting Layer. At startup, the board would display the error FIRST POWER ON DATA ERROR ffff/ffff/ffff/ffff:4933 .However, after displaying that error, the [...]
In for repair is a Sega Golden Axe II Revenge of Death Adder boardset. The board set consists of a large mainboard that handles all the logic processing, a daughterboard with the game data ROMs and another daughterboard that handles inputs for Player 3 and Player 4. Although the boardset is in clean physical condition, [...]
In for repair is a Seibu Kaihatsu SPI mainboard (V2.0 Revision) and a Raiden Fighters 2 game cartridge. The SPI mainboard wouldn t boot on powerup, it would display a generic Checksum Error message. This is a common problem with the SPI platform. The SPI mainboard and game carts are region coded. If the cart [...]
In for repair was DoDonPachi Saidaioujou, a Cave shoot-em-up running on a CV1000-D board. This board is one of the recent reproduction bootlegs that s distinguishable from an original by having gold-plated JAMMA fingers rather than tin-plated. The board would not boot up at all and a D6 LED would light up. As per the CV1000 [...]
In for repair was Muchi Muchi Pork, a Cave shoot-em-up running on a CV1000-B board. The game had visual corruption showing on one of the enemies in the game: Note that the art asset viewer is hidden in this game. Flip Switch S2 on the board to the left, and hold down the Shoot and [...]
Hello everyone, this time I have a SNK Neo-Geo MVS game cartridge on my desk. It has glitches with some of the graphics. MVS cartridges consist of 2 boards the PROG board and the CHA Board. This particular PROG Board holds 16-bit P ROMs and V ROMs. P ROMs are Program ROMs. Some other [...]
Hello everyone, this time I have a Konami Asterix board that I got from the Arcade Museum forums.I bought it as non-working “error with 2 chips” at an affordable price. This is the board: I immediately attached it to my JAMMA Test Rig and powered it up. Indeed, we see 2 defective chips on the [...]
Hello everyone, this won’t be much of a repair article but stay with me. This game is Konami’s Boot Camp. Actually this name is the name published in America in Europe we know this game as Combat School. It is one of my favorite games. I thought it was the same between regions and [...]
Hello everyone, today I have another board on my desk which I purchased as “working” but while my board boots up, it has issues. Irem produced several models of motherboards, and this motherboard is M92. It is a 2-stack board, consisting of a motherboard and a ROM board. M92 does not have any schematics. [Editor [...]