GE MAC 1200 Servicing Instructions page 47

GE Medical Systems MAC 1200 V 1.2 Page 45
Information Technologies 227 492 21 RevF
disconnect the remaining connectors to the recording unit. Undo the 6 PCBs fastening
Screws.
Check whether the connection LOET2 of the lithium battery for the real-time clock (BA1) js
correctly soldered. Also check whether the connection LOET1 of the backlight inverter is
soldered correctly.
insert new PCB, fix the fastening screws and plug in connectors.
Connect keypad in the upper shell to connector KEYB/ and close connector on PCB Control
and set the upper shell on to the lower shell. Tighten the 5 fastening screws.
Load the software via RS-232 interface with the Software Download Kit part No. 2000079-
001.
Enter the device serial number.
If required, enter the option codes as described in the Operator's Manual.
Adjust the display contrast.
Setting the date and time (Section 3.10).
If known, adopt the user-programmed configuration; otherwise, default setting.
If known, reset the user-programmed time constants, otherwise setting to default of 2.04s
(Section 3.1.12). Check the time constant by outputting the self-test results (Section 3.1.6).
Replacing the motor
After replacing the motor, no adjustment of speed is necessary. Nevertheless run the motor
test (Chapter 3.5).
Replacing the graphics display
After opening the device first of all open connector KYO/ and release the flat ribbon cable of
the display. Undo the screws of both plastic display holders, shift it 2 mm in the direction to
the handle and iift up display and holders. Disconnect the plug HOS_BL/.
To re-assemble do vice-versa.
Adjust the contrast with the new display.