Stryker 4700, Maintenance Manual

Page: 22 / 159

Service Information – Litter
21
POWER SUPPLY BOARD REPLACEMENT
Required Tools:
3/8” Socket Ratchet Needle Nose Pliers
Procedure:
1. Properly ground yourself (see page 15 for static discharge precautions).
2. Raise the Fowler to the full up position.
3. Unplug the bed power cord from the wall socket.
4. Remove the four 3/8” bolts from the electrical service panel and remove the access cover.
5. Unplug all connectors from the power supply board.
6. Using needle nose pliers, squeeze the four stand–offs and pull up gently on the board to remove it.
7. Reverse the above procedure to install the replacement power supply.
CPU BOARD REPLACEMENT
Required Tools:
3/8” Socket Ratchet Needle Nose Pliers
Removal Procedure:
1. Properly ground yourself (see page 15 for static discharge precautions).
2. Raise the Fowler to the full up position.
3. Unplug the bed power cord from the wall socket.
4. Remove the four 3/8” bolts from the electrical service panel and remove the access cover.
5. Unplug all connectors from the CPU board. Note the location of the connectors so each will be attached
properly to the replacement CPU board. (See electrical assembly on pages 100–102).
6. Using needle nose pliers, squeeze the five stand–offs and pull up gently on the CPU board to remove it.
7. Install the replacement CPU board and plug all the connectors into the proper locations.
NOTE
All cables and board connections are lettered to aid with re–connection.
8. All replacement CPU boards must be calibrated. See page 22 & 23 for calibration procedures.
9. Reinstall the access cover.