Mackie MDR 24/96 Service Manual download pdf (Page 28)

HDR 24/96 EPROM replacement, SSE Jan 2001

HDR Eprom.pdf, page 1 of 2

HDR 24/96 EPROM Replacement

Models affected:

If you are working on an HDR 24/96 hard disk recorder before serial number CD11218, please update the

EPROM to Revision 1.2 or higher. Changing the EPROM may be one fix for the "system error 43" message.

Note:

If the EPROM is before Rev 1.2, the initial front panel

message “loading..please wait” is all lower case letters.

If the EPROM is Rev 1.2, then the initial front panel message

“Loading..Please Wait,” has some upper case letters.

Safety Warning:

Caution! These instructions are for use by qualified personnel only. To avoid electric shock, do not

perform any servicing unless you are qualified to do so. Refer all service to qualified personnel.

ESD Warning:

Caution! The HDR 24/96 should be treated with respect and repaired using all standard ESD precautions.

Tools Required:

Phillips screwdriver, ESD wriststrap and workstation

Parts Required:

EPROM (revision 1.2 or higher) 080-174-00

Overview

The EPROM replacement is not a major job, so

fear not. The EPROM is fitted to a socket on the

Brain board in front of the internal hard drive.

Procedure:

1. Turn off the power to the HDR 24/96.

2. Remove all cords (including the power

cable and cables) from the HDR 24/96.

3. Place the HDR 24/96 on a soft surface.

4. Undo the three screws on each of the

rack brackets, just enough to give a little

slack when removing the top cover.

5. Remove the top cover by undoing

the other screws shown.

remove

remove from

both sides

slacken

(both sides)

HDR 24/96

front panel

display just

after turn-on

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Mackie MDR 24/96 Service Manual Page 28