Welch Allyn PneumoCheck 61000, Service Manual

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Service Manual 610132 Rev. E Pneumocheck Handle Printer/Charger 15
3 If required, change Red LED to orange
(230015-6).
4 If necessary, change software. You must
remove digital board from front plate to do
this. PROM is location U4 on digital board.
5 If necessary, reverse side contacts. To do this,
remove the two metal contacts from the black
plastic piece. Reverse the plastic piece so that
metal contacts will be raised outside of plastic
surface of main frame. Do this for each side.
6 Calibrate the transducer circuit: to get to ON
reading, see steps 4-7 section A. If ON
reading was in spec.(see step 7, section A),
set to 50 or as close as you can get (within
5 cts.), using R33 (pot at bottom of PC board).
Apply 58.8 DPA (60 mm of water with
manometer) to transducer via long hose.
Adjust R36 (pot just above R33) to 844 +/- 5
cts. Return to ODPA, reading should be 50 +/-
5 cts. Readjust if necessary.
If the transducer reading is outside of the 30-80
range, measure the transducer output of pins 2 and 4
of the transducer. They are the two white wires
coming from the transducer. You should see no more
than approx. 300 micro volts (.3mv). If this is the
case, readjust ON reading to spec. as per sec. B,
step 6.
If you see more than 300 mcvolts (.3mv), replace
transducer.
If you cannot build pressure in transducer,
diaphragm is torn, replace transducer.
Section 2 - Service