Service Manual
9-5
Checks and Adjustments
9
Thermal head motor check
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 8-4.
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.
Set DIP Switch 1-3
on
to start the test. LEDs
ERROR
and
JAM
blink
rapidly to indicate that the test is active.
6.
Toggle DIP Switch 1-8 to make the thermal head move to its print
position. LED
READY
blinks rapidly.
7.
Toggle DIP Switch 1-8 again to make the thermal head move to its
standby position. LED
READY
turns off.
8.
Set DIP Switch 1-3
off
to stop the test.
Power supply thermal head voltage (VH) check
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 8-4.
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.
Set DIP Switch 1-7
on
to select the power supply VH check.
6.
Set DIP Switch 1-3
on to start the VH test. LEDs
ERROR
and
JAM
blink rapidly to indicate that the test is active. Measure the VH low
voltage at the thermal head’s power connector. Pin 1 through 7 are
VH, Pins 8 through 14 are ground.
7.
Toggle DIP Switch 1-8 to make the force VH to its maximum voltage
output. LED
READY
blinks rapidly. Measure the VH high voltage at
the thermal head’s power connector. Pin 1 through 7 are VH, Pins 8
through 14 are ground.
8.
Toggle DIP Switch 1-8 again to return VH to its minimum voltage
output. LED
READY
turns off.
9.
Set DIP Switch 1-3 off to stop the test.