Printer Calibration - Section 2.3.4 - Welch Allyn Atlas Service Manual

Section 2 - Service
2.3.4
PRINTER CALIBRATION
Note: Two lines are displayed:
Waveform +128, Text +70
These two numbers are factory
defaults and a good starting point
if the system is printing very
poorly or not at all.
The LEFT<SET> button controls
the Waveform setting, up and
down. The RIGHT <SET> but-
ton controls the Text setting, up
and down. Make changes tothe
settings as needed, where a
larger number = darker printing
and a smaller number = lighter
printing. Make initial changes of
about 10 points each time. After
making an adjustment, press
<TREND> to exit the Service
Mode.
2.3.5 BATTERY VOLTAGE
CALIBRATION
10 WELCH ALLYN ATLAS MONITOR
2.3.4 PRINTER CALIBRATION
Need:
PC with HyperTerminal
Serial cable
Connector
2.3.4.1 Use HyperTerminal to get strobe width
settings for printer normal for waveforms -
text for trend
Advanced configuration printing:
Pangea> nvram get
printer_strobe_width_normal<ENT>
Pangea> nvram get printer_strobe_width_text <ENT>
2.3.4.2 Change values - larger number for darker
printing. Change with:
Pangea> nvram set printer_strobe_width_normal XXX
Pangea> nvram set printer_strobe_width_text YYY
2.3.4.3 Test and reset until satisfied.
2.3.4.4 Press Trend button to exit the Service Mode.
2.3.5 BATTERY VOLTAGE CALIBRATION for models
622XX and 623XX.
NOTE: CHECK BATTERY VOLTAGE CALIBRATION
AFTER REPLACING MAIN PCB.
Need:
DC power supply rated: 7 VDC at 5A
Battery eliminator cable - Atlas battery plug on one
end, interface to the power supply on the other.
There should be access for voltmeter probes at
the Atlas end of the cable when it is installed
DMM / DVM with 10mV resolution on a 10V scale
PC with HyperTerminal
Serial cable and connector
2.3.5.1. Connect serial cable to PC and Atlas
2.3.5.2 Remove battery from Atlas
2.3.5.3 Set the power supply to 6.8V +/- 200mV
2.3.5.4 Connect the power supply to the Atlas battery
connector.
2.3.5.5 Turn Atlas ON.
2.3.5.6 Reduce the power supply to 6.0V
(normal value 130)
(normal value 70)
SERVICE MANUAL 6200-43E REV. A