Instruction Sheet P/N 1029721A
CPU Board Service Kit - P/N 1028325
Use this service kit to replace the CPU (central processor unit) on any
ProBlue adhesive melter.
WARNING: Risk of personal injury or equipment damage! Refer to
the safety information provided in the melter manual before servicing
the melter. Failure to comply with the safety information provided
can result in personal injury, including death.
Required Tools:
Phillips-head screwdriver
6-mm open-end wrench
CPU board
Threaded spacers and
lock washers (Spare)
WARNING: Risk of electrocution! The control switch does not remove
high-voltage power from the melter. Before opening the electrical
compartment door, ensure that the local power disconnect switch is in
the off position and locked. Failure to properly disconnect power from
the melter can result in personal injury, including death.
1. Switch the melter off.
2. Disconnect electrical power to the melter at the
local power disconnect switch.
3. Open the electrical enclosure door .
4. Disconnect the main board and serial
port ribbon cables from the CPU board.
5. Remove the six threaded
spacers and lock washers.
6. Disconnect the two ribbon cables that join the CPU
board and the control panel.
7. Install the new CPU board by reversing steps 3 through 6.
CAUTION: Before removing the new CPU board from its
anti-static bag, ground yourself by touching any bare-metal
part of the chassis or another grounded structure. Failure to
properly ground yourself can cause electrostatic discharge
resulting in damage to the board.
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8. Restore electrical power to the melter, and then
switch the melter on. Verify that the melter starts normally.
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