Husqvarna PP492HF Workshop Manual page 140

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REPAIR INSTRUCTIONS
9
6. Note! Be careful when reassemble
the main board, the ground wire
connection that fits into the
cooling plate is very close to some
parts that's mounted on main
board and can easily break�
7� When refit the main board it is
important to take away all old heat
transfer paste on the cooler� On
newer main boards the bronze
coloured driver circuits has been
replaced by black components
with a brown heat transfer pad
on top� Main boards with the
heat transfer pad can be mounted
directly on the cooler, without
heat transfer paste�
8� Insert all three screws holding the
bracket� Turn them in without
using any force until they just
touch the plastic surface� Make
sure the plastic bracket touches
both feed motor driver circuits�
Tighten the two outer screws 3/4
turn� Tighten the center screw 1
turn�
Note! All 3 screws must be locked
with locktite�
9� Insert the 3 other screws with
locktite�
Reverse step 1-3 for assembling�
Note! When the mainboard is
replaced the serial number will
not match the one of the power
pack�
To update the s/n go into the
Service menu> Product set> Set
Machine ID>enter the Machine
ID found on the type plate�
See instructions: RC Service
Menu (p� 71) about how to
enter the Service menu�
To reconnect wires see electrical
drawings in section: Wiring
Diagrams