HP 1055CMHP - Manual (Page 79)

Service Tests and Utilities
4-5 HP DesignJets 1050C and 1055CM Printers Service Manual
1. Electronic Systems
The purpose of this test is to verify the operation of the:
n Electronics Module.
n DRAM.
n Trailing Cable.
n Carriage Assembly.
NOTE This test does not test the EIO Card or the Hard Disk Drive.
NOTE The Service Tests work in a special Mode which does NOT
require the full Initialization of the Printer. Therefore it is
important that once you have finished with the Service Test, you
MUST power OFF the Printer and Power ON again before
trying to print.
WARNING IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE
REPLACING THE ELECTRONICS MODULE, TRAILING
CABLE OR THE CARRIAGE ASSEMBLY. IF THIS TEST
PASSES, DO NOT REPLACE THE ELECTRONICS
MODULE, TRAILING CABLE OR THE CARRIAGE
ASSEMBLY.
Tip for Repair This test can be performed with just the Front Panel, Trailing
Cable, Carriage, Electronics Module and the Power Cord
connected together to isolate problems.