Compaq LA36 - Manual (Page 102)

6-6
Trouble-Shooting
Printer Failures
A user cannot generally resolve a problem involving defective printer hardware. On
detecting a fatal error, the printer will:
• Stop printing
• Beep four times if it is not disabled by the Set-Up mode
• Turn the
Online indicator off
• Blink the Paper Out indicator (with a fault indicator lit indicating the error type).
The following errors cause the printer to turn off the power:
• Print head error
• Space motor error (print head carriage motor)
• Line feed motor error
• +34 V overvoltage error
No error condition is displayed if any of these errors occurs.
Turn the printer off and back on, then rerun the same job to check if the error was transient.
If the error recurs, contact your dealer.
Diagnostic Functions
The printer diagnostic functions are print-test and hex-dump.
• Print-test tells you whether the printer hardware is functioning correctly. It prints the
print-test pattern. If the printer hardware is functional, any problems you are having are
probably caused by incorrect printer settings, incorrect software settings, the interface,
or the computer.
• Hex-dump allows you to determine whether the computer is sending the correct
commands to the printer, and whether the printer is executing the commands correctly.
This function is useful to programmers or others who understand how to interpret hex
dumps.
For details on using these functions, all of which are available in the printer Set-Up mode,
see the section “Using the Diagnostic Functions” in Chapter 4, page 4-31.
Besides the above functions, the serial interface loopback test and the parallel interface
loopback test are provided in the printer Set-Up mode. These tests are for service engineers.