Service manual

9-8 DECcolorwriter 1000
9 Checks and Adjustments
Switch and interrupt sensor checks
There are six switch check modes to test a total of 21 switches and interrupt sensors. The
modes test the following switches:
Note Figure 1-3 illustrates the locations of the print engine's sensors.
Mode 1 Cover open sensor
Cover open sensor
TEST button
Second feeder installed sensor
Mode 2 Head lift sensor 1
Head lift sensor 2
Transfer roll core sensor 1 (left)
Transfer roll core sensor 2 (right)
Mode 3 Tray switch 1 (standard)
Tray switch 2 (standard)
Tray switch 3 (standard)
Paper empty sensor (standard tray)
Mode 4 Tray switch 1 (second feeder)
Tray switch 2 (second feeder)
Tray switch 3 (second feeder)
Paper empty sensor (second feeder tray)
Mode 5 Paper-pass sensor 1
Paper-pass sensor 2
Paper exit sensor
Drum home position sensor
Mode 6 Transfer roll low sensor
1. Turn off the printer.
2. Remove the rear cabinet panel to access the engine control board. Refer to
the Chapter 8 topic “Printer cabinet panels” on page 8-3.
3. Press and hold the TEST button and turn on the printer. Release the TEST
button. The printer is now in service mode.
4. Set all the DIP 1 switches off.
5. Select the test mode you want from the list above and then set the DIP
switches to activate the test mode you want:
Mode 1: Set DIP Switch 1-4 on.
Mode 2: Set DIP Switches 1-4 and 1-7 on.
Mode 3: Set DIP Switches 1-4 and 1-6 on.
Mode 4: Set DIP Switches 1-4, 1-6 and 1-7 on.
Mode 5: Set DIP Switches 1-4 and 1-5 on.
Mode 6: Set DIP Switches 1-4, 1-5 and 1-7 on.