Troubleshooting 10-11
1560D-UM051D-EN-P – February 2005
Circuit Board Replacement The replacement of printed circuit boards is straightforward, however,
there are a number of precautions which must be considered when
handling the boards.
Some circuit boards may contain CMOS components
which can be destroyed by static charges generated by
friction of materials made with synthetic fibres. Use of
damaged circuit boards may also damage related
components. A grounding wrist strap is recommended
for handling sensitive circuit boards.
1. Remove all power from the equipment.
To avoid shock hazard, ensure the main power has been
disconnected before working on the controller, motor or
control devices. Verify that all circuits are voltage free
using a hot stick or appropriate voltage measuring device.
Failure to do so may result in burns, injury or death.
2. Carefully detach all wires, cables and connectors, noting their
location and orientation. For the interface board, remove the control
module (see page 10-7).
The fibre-optic cables can be damaged if struck or bent
sharply. They have a locking feature which requires
pinching the tab on the connector and gently pulling
straight out. The component on the printed circuit board
should be held to prevent damage.
3. For boards mounted with hardware, remove the hardware, taking care
not to drop anything onto other circuits. For boards with nylon stand-off
posts, squeeze the section above the board and carefully pull the board
up and off the post.
4. Lift out the circuit board, and check that the replacement board is the
correct part number and revision before installation (refer to Appendix C).
Install the new board by replacing the hardware, or pressing down onto
nylon stand offs. Connect all wires, cables and connectors. Ensure
that all switch and/or jumper settings on the new board are identical to
those on the old board, and correct for the application.
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