Electrical Adjustments; Printhead Voltage Adjustment - Printronix T3204 Maintenance Manual

Electrical Adjustments

The following adjustments should be performed only by qualified personnel.
These adjustments should be performed after Printer Controller PCBA or
power supply replacement as described on pages 7–7 and 7–8, respectively.

Printhead Voltage Adjustment

NOTE: You will need a voltmeter to set the printhead voltage.
1. Turn off the printer and remove the AC power cord.
2. Remove the printer cover (see page 7–3).
3. Attach the AC power cord to the printer and turn on the AC power
switch.
4. Print a batch of test labels. When the printer begins printing, press the
ON LINE/PAUSE button on the printer.
NOTE: The method used to print test labels will vary depending upon the
5. Raise the printhead and read the printhead resistance value located on
the right side of the label on the bottom of the printhead.
NOTE: This value is printed on the label as a three digit number, followed
6. Lower the printhead and lock in place by rotating the lever clockwise to
its vertical position.
7. Place the black (–) voltmeter probe on ground or clamp to the frame.
8. Connect the red (+) voltmeter probe to J12 pin 8 (located on the Printer
Controller PCBA).
9. Press the ON LINE/PAUSE button on the printer to resume printing.
4–8
printer emulation. For specific instructions, see the Setup Guide
corresponding to the emulation installed.
by the ohms symbol, e.g. 752Ω. Check Table 4–1 for the correct
voltage settings.
Maintenance and Adjustments