Service manual

9-4 DECcolorwriter 1000
9 Checks and Adjustments
Printer self-checks
Table 9-2 summarizes using DIP Switches 1-4 through 1-7 to select self-check modes to
adjust and calibrate the print engine's sensors and mechanisms. The topics following
Table 9-2 explain when and how to use each check mode. The printer must be in service
mode to execute self-checks.
Note Turn off the printer and reenter service mode between each test.
Turning Switch 1-3 on starts the selected test. Turning it off stops the test.
↑ indicates switch is on.
Table 9-2 Self-check mode summary
Dip Switch
1-4 1-5 1-6 1-7 Check or adjustment mode
Thermal head in print/standby position.
↑ Transfer roll feeds continuously.
↑ Second feeder connection test.
↑↑Paper path check (pick, feed, clamp, and eject).
↑ Leading edge margin tolerance adjust (generally a
manufacturing adjustment).
↑↑Paper tray select.
↑↑ Aging test (manufacturing test).
↑↑↑Auto-calibrates all reflective-type sensors.
↑ Mechanical switch check 1: cover open switches, reset
switch, second feeder.
↑↑Mechanical switch check 2: head lift sensors and transfer roll
core sensors.
↑↑Mechanical switch check 3: standard paper tray switches
and tray-empty switch.
↑↑↑Mechanical switch check 4: optional paper tray switches and
tray-empty switch.
↑↑ Mechanical switch check 5: paper-pass sensors, paper exit
sensor, drum home sensor.
↑↑ ↑Mechanical switch check 6: transfer roll half used sensor.
↑↑↑ Transfer roll mark sensor adjust.
↑↑↑↑Paper clamped sensor adjust.