ITW Dynatec c. 2004
DYNAMINI ASU Manual #20-25
Page 7-1
Revised 1/05
Chapter 7
TROUBLESHOOTING
General Troubleshooting Notes
Note: Re-read Chapter 1 “Safety Precautions” before performing any troubleshooting or repair proce-
dures. All troubleshooting or repair must be performed by qualified, trained technicians.
DANGER
HIGH VOLTAGE
WARNING
HOT SURFACE
Dynamini systems use electrical power that can be life threatening and hot-melt adhesives that
can cause serious burns. Only qualified persons should perform service on the Dynamini sys-
tem.
Handling Printed Circuit Boards (PCBs)
CAUTION: 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.
DANGER HIGH VOLTAGE
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 remov-
ing and replacing connectors.
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