Technical Manual

Chapter 5 • Maintenance
D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l 39
Replacing a Printed Circuit Board (PCB)
Use the following procedure to replace PCBs. Contact the Aclara RMA
department for an RMA number by calling 800-892-9008 or by emailing
[e-mail].
Handle circuit boards in accordance with static control procedures. The PCBs
contain Electrostatic Sensitive Devices (ESDs) and may be damaged by
improper handling.
Observe ESD handling instructions below to help minimize or eliminate possible
damage.
• Wear static control wrist straps in contact with skin.
• Use ESD safe tools and equipment to prevent short circuits. Use plastic,
instead of metal tools, where possible to prevent short circuits.
• Discharge static on yourself by touching a metal object before unpacking or
touching PCBs or other DCU components.
• Handle PCBs only by the edge of the board; do not touch conductive patterns
or components.
1. Loosen four screws on clear PCB box cover and remove cover.
2. Carefully disconnect any wires connected to PCB you are replacing.
3. Remove black retaining clips on card guides using diagonal cutters.