7.2
REPLACEMENT PROCEDURES
Technical Service Manual
7 - 33
430-00587-008 (Rev. 2/05)
MCU PWA AND SENSOR/MCU CABLE ASSEMBLY
REPLACEMENT
The recommended tools for this procedure are a medium size flat blade screwdriver, needle
nose pliers, and diagonal cutters.
The replacement parts for this procedure are:
PWA, MCU
Assembly, Cable, Sensor/MCU
Tie, Cable
CAUTION:
Use proper ESD grounding techniques when handling components.
Wear an antistatic wrist strap and use an ESD-protected workstation. Store the PWA
in an antistatic bag before placing it on any surface.
To replace the MCU PWA and the sensor/MCU cable assembly, refer to
Exploded View of the Main Chassis Assembly
Figure 7-17, Top View of the Main Chassis
, then proceed as follows:
1. Separate the front enclosure assembly, rear enclosure assembly, and main chassis
assembly as described in
2. Disconnect the following cables from the MCU PWA:
- sensor/MCU cable assembly from J5
- plunger motor cable assembly from J7
- input/output motor cable assembly from J8
- primary/secondary motor cable assembly from J9.
3. Inspect the cables and replace if necessary.
4. Slide the MCU PWA out of the main chassis assembly.
Note:
Some configurations may contain a cable tie securing the MCU PWA to
the main chassis. If there is a cable tie present, examine the placement, and,
using the diagonal cutters, cut the cable tie to remove the MCU PWA.
5. Install the replacement MCU PWA into the main chassis assembly.
6. Connect the following cables to the MCU PWA:
- plunger motor cable assembly to J7
- input/output motor cable assembly to J8
- primary/secondary motor cable assembly to J9
- sensor/MCU cable assembly to J5
7. (XLM with DataPort only) Position the ferrite between MCU J5 and the battery
compartment. Verify the sensor/MCU cable is looped back to J5 in an 'S'
configuration as shown in
Note:
If the original configuration did not contain the cable tie, proceed to
Step 14.
8. To replace the cable tie, hook it around the main chassis boss. Confirm the locking
head of the cable tie is located on the right side of the main chassis boss.
9. Connect the MCU PWA securely to the power supply PWA.
Summary of Contents for LifeCare XL Series
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