Service manual

Ultraview 1030/1050 Monitors — Service Manual
5-28
Problem Messages
If the following error messages are displayed for the Capnograph Option (G or H), perform the
suggested corrective action:
Service Required
Check for power to the Sensor Interface PCBA.
1 Disconnect the module from the monitor.
2 Disconnect the Sensor Interface PCBA from the CO
2
/SDLC PCBA.
3 Connect the module to the monitor using the SDLC extender cable.
4 Check for the following voltages on the appropriate connector of the CO
2
/SDLC PCBA
(use TP2 for ground reference).
5 If the voltage check does not pass, replace the CO
2
/SDLC PCBA.
Conduct a Loopback test:
1 Disconnect the module from the monitor.
2 Remove the original software from U37 of the CO
2
/SDLC PCBA. Set aside for later use.
3 Install the test software (P/N 174-0527-01) into U37.
4 Jumper J2 pin 4 to J2 pin 5 of the CO
2
/SDLC PCBA.
5 Connect the module using the SDLC extender cable and watch for the sign-on message. The
message LOOPBACK TEST PASSED should appear (disregard the O2 SPAN REQUIRED or
the O2 ZERO REQUIRED messages).
Pins on J3 for G Voltage
1 +5 V ±0.25 V
6 +8 V ±0.5 V
13 -5 V ±0.25 V
14 -42 V (-38 to -50 V)
15 -8 V ±1.5 V
Pins on J2 for H Voltage
7+5 V ±0.25 V
8 +15 V ±1 V
9-15 V ±1 V
10 +5 V ±0.5 V