22 Repairs: Information and Instructions
9.10 Fitting new circuit board WM 10680
Important!
For this operation it is essential to use an ESD work-
place because of the risk of damage to the circuit
board by static electricity.
Tools and equipment required:
• Phillips screwdriver size 2.
1. Open the device (see ”9.2 Opening the de-
vice“ on page 15).
2. Carefully detach electrical power pack con-
nector X3 from the circuit board.
3. Unscrew power pack holder (4 cross-head
screws 40).
4. Remove power pack.
5. Carefully detach electrical connectors X1 and
X2 of internal wiring harness from circuit
board.
6. Carefully detach electrical connector X4 to
motor from circuit board.
7. Carefully detach pressure measurement tube 47
from pressure sensor on circuit board.
X4
X2 X1
X3
X3
X4 X2 X147
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