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4. Operation and Troubleshooting
4.1 Normal Operation
The LEDs indicate normal
operation. The green POWER LED
should glow, and the two red SYNC
LEDs should flash to indicate packet
transfers. The Repeater requires
little in the way of maintenance, and
can be expected to transfer data for
months, if not years, with little or no
attention.
4.2 Problem-Solving Checklist
You may notice a change in the
performance of the Repeater for a
number of reasons. The checklist
below can eliminate some of the
common causes of trouble. When
you have tried all these solutions,
call your supplier.
CAUTION
Don't try to repair the 3270
Repeater yourself. There are
no user-serviceable parts
within the Repeater. If you
open the case, you may
harm yourself, damage your
equipment, or compound the
problem with your Repeater,
and you will also void the
warranty.
CHAPTER 4: Operation and Troubleshooting
Problem: All LEDs remain dim.
• Check your AC plug and power
supply.
Problem: SYNC LEDs won't flash.
• Check your cable connections.
• Tighten any loose wiring on your
Repeater, your controller, and
your workstation.
• Make sure your baluns are in
working order.
• Check the polarity of your lines.
The Repeater is sensitive to
reversed polarities.
Problem: Noisy or corrupted data.
• Replace any bridged cables.
• If possible, replace any flat silver
satin cable with unshielded
twisted-pair cable. Flat silver
satin cable is vulnerable to
interference.
9
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