Texas Instruments 880 User Manual page 46

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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