Digiplan BLX75B showing error code 3 - EPROM memory map changed, but unable to clear fault.

Hi William,

Thank you for the advice.

We have a known good working BLX75B with EPROM Firmware 3.14 (sticker also labelled '5500 075' red spot), which I have taken a hex dump of, checksum: 6B91. I did the same with the faulty drive's EPROM which is also Firmware 3.14. The checksum is the same and comparing the data from this EPROM with the good drive's EPROM backup shows that it's identical. From this I think the EPROM is correct.

Do you know what the error code explanation 'EPROM memory map' means?
Is it perhaps referring to the battery backed SRAM?

I'm thinking that there may be a factory programmed data area in the SRAM which was lost when the battery went dead, and the drive cannot see this data. But then, when a battery is replaced, would this data area be restored with the TPCPZ command?

What I'm saying is, is the battery a user servicable part that can be renewed, then the TPCPZ command performed which would bring the drive back to a working state? Or is battery replacement something that could only be done at a Parker authorised service centre because of SRAM that has to be factory/service centre programmed?

Kind Regards,
Matt.

Based on what you said I have just taken a data dump on

Hi Matthew.  Basically, the only thing you can really do here is replace the battery and try TPCPZ.  If that does not work, the unit is dead.  This product has been discontinued long enough that Parker no longer maintains the capability to repair it (similarly, there are no authorized repair centers).  We also cannot provide binary packages, schematics, design details, source code or other information related to repair because of how long it has been gone.

Hate to be the bearer of bad news, but there is nothing we can do for these anymore when they go bad.