Service Manual
9-13
Checks and Adjustments
9
6.
Set DIP Switch 1-3 on to start the test. LEDs
ERROR
and
JAM
blink
rapidly to indicate the mode is active.
7.
Actuate the switches corresponding to the test mode you selected.
LEDs
PAPER
,
RIBBON
,
COVER
, or
READY
blink rapidly when each
switch is actuated.
8.
Set DIP Switch 1-3 off to stop the test.
Table 9-5 Mechanical and interrupt switch check summary
Test
mode
LED
Switch
Mode 1
PAPER
RIBBON
COVER
READY
Transfer roll core left front sensor (actuate the switch at
the left front end of the take-up roll)
Transfer roll right core sensor (actuate the switch at the
right end of the supply roll)
Transfer roll left rear core sensor (actuate the switch at
the left rear end of the supply roll)
Top and front cover open sensor (open either the top or
front cover)
Mode 2
PAPER
RIBBON
COVER
READY
Head lift sensor 1 (open the top cover to access the
switches. Rotate the head lift cam to actuate the switch)
Head lift sensor 2 (do the same as head lift sensor 1
Optional Lower Tray Assembly installed sensor (unplug
the second feeder from the rear of the print engine)
TEST button (press it)
Mode 3
PAPER
RIBBON
COVER
READY
Tray switch 1 (standard feeder — top switch)
Tray switch 2 (standard feeder —- middle switch)
Tray switch 3 (standard feeder — lower switch)
Paper empty sensor (standard tray empty — remove the
tray and actuate the paper empty flag)
All the LEDs blink if the tray is not installed
Mode 4
PAPER
RIBBON
COVER
READY
Tray switch 1 (second feeder — top switch)
Tray switch 2 (second feeder — middle switch)
Tray switch 2 (second feeder — bottom switch)
Paper-empty sensor (second feeder tray empty —
remove the tray and actuate the paper empty flag)
All the LEDs blink if the second feeder or its tray is not
installed
Mode 5
PAPER
RIBBON
COVER
READY
Paper-pass sensor 1 (located in front of aligning rollers,
on the left end of the rollers)
Paper-pass sensor 2 (actuate by slipping a sheet of
paper through the aligning rollers)
Paper-exit sensor (remove the front cover to access the
sensor)
Drum-home position sensor