4: Repair Internal Assemblies — Main Chassis
130
Therapy PCA
Removing the Therapy PCA involves disconnecting many cables and removing many screws. Take your
time and be methodical.
CAUTION: Never touch the Therapy PCA surface with your fingers.
Keep the replacement Therapy PCA in the antistatic pouch until ready to install.
Preparation
1 Open the Case. See “Opening the Case” on page 90.
2 Remove the Main Chassis. See “Internal Assemblies — Main Chassis” on page 112.
3 Remove the Main PCA Module of the Main Chassis. See “Disassembling Main Chassis” on
page 115.
4 Position the Therapy PCA facing you.
Removal
1 Disconnect the Therapy PCA connector cable, the Battery Power Cable, and the Battery Signal
Cable.
2 Remove the two M 3x15 screws with Isolation gasket, see Figure 104.
Figure 104 Therapy PCA
3 Carefully but firmly grasp the two edges of the Therapy PCA and lift the Therapy PCA.
NOTE: Do not touch any electronic parts and components on the Processor PCA.
There are two plastic shields under the Processor PCA and Therapy PCA. Make sure you reuse both of
them in the replacement procedure.
Battery Power Cable Battery Signal Cable Therapy PCA Connector Cable
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