SNK Neo Geo MV1a Z80 Error Repair
SNK Neo Geo MV1a Z-80 Error Repair.
Defect:
- No Sound (Z-80 Error)
Repair:
- Replacement of the Z-80 CPU in PSOP40 format.
Note:
- The error message “Z-80 Error” means everything and nothing, may be faulty the Z-80, SNK MASK-ROM SM1*, SNK NEO-D0 or also the YAMAHA YM2610.
With the Neo Diagnostics bios and with the M1 ROM burned and installed on the CHA Board of any NEO GEO cartridge, the problem can be better identified.
It is said that the error C3/00 that you see in the photos of NEO DIAGNOSTICS (write: C3 but reads: 00) is an almost assured a CPU problem, in fact, in this case it was.
The Z-80 CPU in PSOP40 format has been recovered from a failed SEGA GameGear.
Gallery:
source: neogeo diag
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