Teledyne HASTINGS 2002, Инструкция по эксплуатации, Страница: 36 / 49

page 36
Symptom: Fixed display, regardless of pressure
Action: 1. Check sensor.
a) Remove front panel and slide PCB out of case enough to expose TP 3, 4 & 5.
b) With the sensor at atmosphere, measure the voltage between TP 3 - 4, and
the voltage between TP 4 - 5.
c) Calculate the power: power= [(V
TP3
- V
TP4
) x (V
TP4
- V
TP5
)]/154
(the power level of a good tube should be » 40 ± 10mW)
2. Consult the factory.
Symptom: Control buttons not functional
Action: 1. Check membrane/PCB connection
a) Remove the front panel.
b) Verify that the 5 pin ribbon connector is firmly seated over all 5 pins of P2.
The grey side of the ribbon cable should be toward the outside of the case.
2. Consult the factory.