Welch Allyn Atlas Service Manual page 29

Section 3 - Troubleshooting
46. Get Service Mode menu.
47. Press <Select> to highlight CRT test pattern.
48. Press <BP START/CANCEL> to show test pattern.
Examine display.
49. Press any key to end display.
50. Press <Select> to highlight Printer test pattern (if
fitted).
51. Press <BP START/CANCEL> to start test pattern.
52. Printer should print test pattern.
53. Press any key to end display.
54. Examine printout.
55. Press <Select> to highlight LED test .
56. Press <AUTO> to turn on all LEDs .
57. Press <BP START/CANCEL> to show automatic test
pattern.
58. Watch for a while, look for glitches in pattern.
59. Press <Set> to go to manual mode and step through
individual segments if needed to observe a problem.
60. Press <Select> to highlight Button test.
61. Press <BP START/CANCEL> to start test.
62. Press every button on system, <BP START/CANCEL>
last.
62.1. Verify that buttons match up with their names,
and that all buttons are functional.
62.1.1.
63. Press <Select> to highlight Display A/D channels
(three or four screens worth)
63.1. Write down all values for later review.
63.2. Press <Set> and write down all values for
each screen.
64. Press <Trend> to return to Idle screen.
65. Connect the BP port to the BP simulator.
66. Set the simulator for a normal reading (140/80,
100BPM, NSR).
67. Press <BP START/CANCEL>
67.1. System should start pump, display manom-
eter value in SYSTOLIC LED; this value
should track and be very close to pressure
SERVICE MANUAL 6200-43E REV. A
3.1 Functional Test and Initial Diagnostic
If names don't match, indicates
memory corruption: Replace main
board
BP test
WELCH ALLYN ATLAS MONITOR 3