Specifications

Troubleshooting
The simple design of TH320 requires virtually no periodic servicing.
However, if problems do occur, they can usually be diagnosed readily by
checking the light status indicators, below, then referring to appropriate
section of the Troubleshooting guide on the pages that follow.
Status Indicators
The on-line, paper status, error light is the light to the rear, on the top edge
of the printer. It may be the first indication that something is wrong.
The light closer to the front on the right edge of the printer indicates that a
form is inserted properly. It does not indicate an error.
For some unexpected conditions, the printer communicates the information
to the host computer and relies on the application to indicate what the
condition is.
The information on the following pages describes common conditions that
you could encounter and easily fix yourself. A few may require that you
contact a service representative.
You should be able to correct many of the conditions locally without calling
for service. However, if a condition persists, contact a service
representative. See “Contacting a service representative” at the end of this
chapter.
Ty pi cal Re me dy Pro ce du re
If an unexpected condition has occurred, take the following general steps:
n
Cycle the power of the printer and note its behavior.
n
Check the on-line, paper status, error light and compare its behavior to
the following table.
n
Test the receipt printer or slip printer by printing a sample test print as
described elsewhere in this document.
n
Determine if the condition is with the thermal receipt printer or the impact
slip printer and refer to the tables on the following pages.
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STATUS INDICATORS