Recent content by r67055

Hello. I want to save a Ghost N Goblins Bootleg Pcb. I managed to fix the graphic error, I thought everything was fine. The output stage Ic is missing, I thought I would put one in and the pcb is ready. Unfortunately not. The error comes from deeper. I went back to the LM324 preamplifier output...

no unfortunately. I went through all the fujis and didn't see any errors

Hi WTS. For sale golden Axe 2 Works in good condition. Anyone interested? I send pictures,and Video... thanks

so much has changed that not all stripes are red

one of the 377 is faulty. I replaced it, but it didn't improve

I tested 12pcs, 161s and they all work :(

the 2 pieces are 257 and good. I continue tomorrow

8 pieces of 74ls157 and I tested it with a tester. no. none of them are at fault

I replaced the 4 rams, the error remained. the error will surely be around 4 rams here. if I remove the ram, the character is missing from the monitor. I don't know how to find the error after this.

4 pcs 2148 rams here

hi! I ran into an original magmax pcb. Can you help me with where to start troubleshooting? all eproms are fine, checksum. Thanks

With the help of the bootleg pcb, I found out that the error is in the lower pcb. I'm thinking of a RAM error.

The R type pcb also has a graphic error. Could this also be a RAM error? View: https://youtu.be/Y3xMVlLEL2c?si=HOXizSckar-DiT5p

Thank you very much for your help!

thank you very much for your help. I'm happy. I looked at the schematic. I saw that the RAMs to which the 74ls157 are connected are elsewhere. I decided to check the RAMs. one of the 4 was faulty.