Section 3 Problem Diagnosis; Diagnostic Procedure For Returned Units - Welch Allyn Spot Vital Signs Service Manual

Welch Allyn, Inc. Spot Vital Signs Service Manual
Revision A
NOTES:
A. The word "unit" in this text refers to the Spot Vital Signs.
B. "Menu|Choice" represents menu commands. Rather than use the phrase "choose the exit command
from the File menu."
1. Remove the battery from the unit. Connect the unit to the power supply. Set the power supply to
6.5 Vdc +/- 0.2 Vdc.
2. With a digital multi-meter, check the voltage of the battery. If the voltage of the battery is less than
6.0 Vdc, the battery needs to be charged. Up on completion of this procedure, place the battery back
into the unit and plug up the charger. Let the battery charge for 8 hours. Next allow the unit to set for
1 day and recheck the battery voltage. If the voltage is below 6.0 Vdc, change the battery.
(Reference section 4.1 page 39)
3. Power up the unit. If the unit does not power up:
A. Insure the power supply is on and has the correct requirements as called out for in the
repair manual.
B. The power supply is connected to the unit and turned on.
C. Check that the fuse is not blown. (Reference section 4.6 page 44)
D. Change the main PCB. (Reference section 4.6 page 44)
E. Change the display PCB. (Reference section 4.4 page 42)
If the unit does power up:
4.To check the display PCB, observe the unit during power up. All of the LCD segments should be lit
for 1-2 seconds before the unit gets to its normal mode. If the unit has any LCD segments out change
the display PCB. (Reference section 4.4 page 42)
5. Run a couple of blood pressure cycles to insure proper inflation/deflation and readings.
6. If the unit is not inflating/deflating properly:
A. Open up the unit by removing the 4 housing screws.
B. Check the unit for pinched tubing if the unit is deflating too slow. With the housing
opened, re-run the blood pressure cycle to see if the deflating problem has been fix. Re-
route tubing if pinch is found.
C. If there are no pinched tubes, change the valve. (Reference section 4.8 page 46)
D. Power down the unit. Place unit into configuration test mode by holding down the "start"
button as power is re-applied. Press the mode button until "cal" appears in at the top of
the LCD window.

Section 3 Problem Diagnosis

3.1 Diagnostic Procedure for Returned Units

Page 26 of 64