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S5 System • Replacing components
SM-5811-0000.01 ENG
6.35
6.4.3
Replacing circuit boards
Fig. 67: Replacing the circuit board HMR 0403 (1)
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Remove the three head socket screws shown above (DIN 912 M3x6 / allen key size 2.5 mm), including
washers (DIN 125 A 3.2).
Warning
: The circuit board cannot be removed completely, because the connections between pump
head and circuit boards must be disconnected first!
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Disconnect the connector
from the circuit board
Motor power amplifier