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Texas Instruments 880 - Page 46

Texas Instruments 880
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Table 4-2.
Problem
Analysis
Procedures
Problem
Suggested
Action
Error
indicator stays on
continuously.
Error
indicator blinks
slowly.
Non-recoverable
power-up error
or
fatal error during normal operation. Cycle power.
If
indicator stays on, call service representative.
Operator error or communication error. Get status report and
follow
procedure in Table 4-
1.
Error
indicator blinks Carriage movement error. Clear obstruction and press Reset key.
rapidly.
Paper
Out
indicator blinks. Load paper and then press Reset key.
Printhead does
not
print.
1.
Check ribbon condition and position.
2.
Check
Power
indicator.
3.
Check for normal operation: print form report.
4.
Check data cable connections.
5.
Cycle power. If problem persists, call service representative.
Error report indicates parity
Verify proper parity code choice.
Press
Reset key.
If
problem persists, call service repre-
error. sentative.
Print
is
too light.
1.
Adjust printhead
to
the platen.
2. Change ribbon.
Print
is
too dark or Adjust printhead away from platen.
smudged.
On
Line indicator blinks
1.
Press
Normal
key. NOTE: With configuration code
14
or
15
active, On Line indicator
when
in
normal mode. will blink when the host has not raised the
DSR
signal (pin
6:
serial interface). With config-
uration code
13
ON, On
Line
indicator will blink when
CTS
(pin 5),
DSR
(pin 6), or
DCD
(pin
8)
has
not been
raised
by the host system.
Power
indicator
does not turn on.
Printer operation
not
as
expected.
4-6
2.
Check communication link.
1.
Check power cable connection.
2. Try another power
outlet. If problem persists, call service representative.
Verify that correct data
is
being sent by enabling configuration code
87
to
cause special
symbols
to
be
printed for the received control characters shown in Appendix
C.

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