MV1B with Backup ram error

Akille68

Akille68

Crazed MVS Addict
Joined
Dec 29, 2012
Posts
141
HI Folks,
Jut got an MV1B by a friend for parts, but I would like to play with it before its discharge.
Code error is always the same:

ADDRESS 00D01000
WRITE 5555
READ 5535

I was said that the error came out just after he removed battery.

Here is a shot of the backup area.



Please, point me to the right direction on what I should check and replace.
Thank u
 
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J

jaydie1

n00b
Joined
Jan 2, 2013
Posts
35
The battery might have leaked and caused some trace damage. Try searching the error code on this forum, someone else has probably fixed this error.
 
Xian Xi

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,762
Looks like you might have some bad traces. Check continuity from chip to chip.
 
channelmaniac

channelmaniac

Mr Neo Fix-it
15 Year Member
Joined
Nov 29, 2005
Posts
4,316
The error message is not at the base address of the chip so I doubt it's a data line problem. Check the address lines for continuity to the CPU. If all are OK then you simply have a bad chip.
 
channelmaniac

channelmaniac

Mr Neo Fix-it
15 Year Member
Joined
Nov 29, 2005
Posts
4,316
Not for that model.

You don't need schematics. Look up the data sheets for the CPU and for the RAM.
 
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