Printhead Voltage Adjustment - Datamax M-Class Mark II Maintenance Manual

Level Two Reset
•
To return the firmware default settings and clear calibration and adjustment parameters,
turn OFF the printer then press and hold PAUSE, FEED, and CANCEL while turning ON
the printer. Continue to depress the keys until READY appears.
Note: Calibration must be performed after a Level Two Reset; see Section 2.2.

2.10

Printhead Voltage Adjustment

Use extreme caution as voltage measurement is required; if the applied
voltage exceeds 28 VDC, printhead damage can result.
CAUTION
The printhead voltage adjustment is required when (1) replacing the power supply; or, (2) if
the factory voltage setting has been changed. No voltage adjustment is required during a
routine printhead replacement. Adjust the Printhead Voltage as follows:
1. Turn OFF and unplug the printer.
2. Remove the cover; see Section 4.1.
3. Using a multi-meter set to measure DC volts, connect the negative probe to chassis
ground and then proceed according to the revision of the installed Power Supply:
If equipped, connect the positive probe to the Q3 Heat Sink; or,
•
Power Supply PCB
Adjustments and Maintenance
RP1
2-28
Q3 Heat
Sink