GE MAC 600 SPY, Service Manual

Page: 66 / 127

4-16 MAC
TM
600 Revision G
2047426-002
Maintenance: Preparing System for FRU Replacement
1. Open the device as described in “Opening the Device” on page 4-8 .
2. Raise the top cover of the housing and disconnect the keypad cable
from the J4 connector for the old PWA, or J7 connector for the new
PWA and display cable from the J5 connector for the old PWA or J6
connector for the new PWA. Disconnect the display cable connector
from the J2 connector on the Daughter PCB (refer
“PWA Connector
Details” on page 4-10).
3. Remove the daughter board from the display holder as described in
“Replacing the Daughter PCB assembly” on page 4-19 .
4. Start with snap number 1, pull the snap out and push the display
holder in the direction of the arrow. Follow the same procedure for
snaps number 2, 3 and 4.
5. Once snaps number 1, 2, 3 and 4 are detached, lift the left side of the
display holder and remove the LCD Module from the cover top
pocket.
6. Pull out the display holder to the left to detach it from snaps number
5 and 6.
7. Make sure the O-ring is in place or replace it with the new one.
8. Replace the new LCD module in the pocket of cover top, with the
cable on the bottom side.
9. Place the display holder on the cover top with all the snaps aligned.
10. Press the display holder at each snap region, to assemble the display
holder to the cover top.
11. Snap the daughter board to the display holder.
12. Re-connect the display cable to J5 for the old PWA or J6 for the new
PWA and the keypad cable to J4 for the old PWA or J7 for the new
PWA.
13. Re-attach the upper section of the device to the lower section with the
four screws.