Welch Allyn Atlas Service Manual page 49

Section 3 - Troubleshooting
Connect serial cable between Atlas and PC
Start HyperTerminal on PC
At Pangea> prompt, type:
Pangea> nvram get printer_strobe_width_text<ENTER>
Write down this value
If problem is that TEXT printout is too light, increase this
number. If the TEXT printout is too dark, decrease this num-
ber.
Range is 0-256. Set new value with:
Pangea> nvram set printer_strobe_width_text
XXX<ENTER>
Pangea> nvram write<ENTER>
Where XXX is the new value.
Repeat the test that showed the problem.
Repeat this test-and-set process until ideal value is achieved
Disconnect serial cable
A bad date may indicate a battery problem. If date was bad,
turn off unit, pull power cable, reconnect power cable, turn on
unit. Check date again.
If date comes back bad:
Model 621xx: test/replace lithium on-board battery
Model 622xx/623xx: charge/test battery
If battery OK/Charged/Replaced repeat Test Setup 2
If still not maintaining date goto NVRAM 2
Failure to correctly reset factory defaults indicates memory
problems. Changing only the language should not change
any of the other factory default settings.
Reinstall software and repeat test.
If still failing
Replace CPU board
Date comes back wrong and battery already tested good
Reinstall software and repeat test
If still failing
Replace CPU board
Save Settings does not work
Reinstall software and repeat test
If still failing
Replace CPU board
SERVICE MANUAL 6200-43E REV. A
3.4 Diagnostic Tests
Printer Settings 2
Date 1
NVRAM 1
NVRAM 2
NVRAM 2
WELCH ALLYN ATLAS MONITOR 23