Chapter 6
Controller V6 Touch
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 103
6.3 Modules and Printed Circuit Boards (PCBs)
The Bulk Melter DM55 and DynaControl controller utilize several printed circuit boards
(PCBs). These boards are extremely sensitive to electrostatic charges. When working
near or with any PCBs, the following procedures must be followed to avoid damage to
them.
Before unplugging connectors from the I/O PCBs, ground yourself to the ASU by
touching any available unpainted cool metal surface, mounting screws, etc. This
will avoid electrical discharge to the PCB assembly when you are removing and
Printed circuit boards (PCBs) should be handled using the following procedures:
1. Wear a wrist grounding strap. If a grounding strap is not available, frequently touch a
bare metal part of the ASU (unpainted frame, mounting screw, etc.) to safely
discharge any electrostatic buildup on your body.
2. Handle a PCB by its edges only. Don’t grip a PCB across its surface.
3. When removed from the ASU, each PCB must be individually packaged inside a
metallized, static drain envelope. Do not place the removed PCB on a table, counter,
etc. until it has first been placed in or on a static drain envelope.
4. When handing a PCB to another person, touch the hand or wrist of that person to
eliminate any electrostatic charge before you hand the PCB to him.
5. When unwrapping a PCB from its static drain envelope, place the envelope on a
grounded, nonmetallic surface.
6. To cushion PCBs for shipment, use only static-drain bubble pack. Do not use foam
peanuts or bubble pack not known to be static draining.
The following pages detail the Modules and PCBs.
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