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Teledyne API T703 Calibrator Operation Manual General Troubleshooting & Repair
207
11.4.9.5. Control Outputs
Table 11-12: Control Outputs Pin Assignments and Corresponding Signal I/O Functions Check
PIN (LEFT TO RIGHT) STATUS
1
CONTROL_OUT_1
2
CONTROL_OUT_2
3
CONTROL_OUT_3
4
CONTROL_OUT_4
5
CONTROL_OUT_5
6
CONTROL_OUT_6
7
CONTROL_OUT_7
8
CONTROL_OUT_8
9
CONTROL_OUT_9
10
CONTROL_OUT_10
11
CONTROL_OUT_11
12
CONTROL_OUT_12
To test the Control Output electronics:
1. Connect a jumper between the “E“ pin and the “” pin on the status output connector.
2. Connect a 1000 ohm resistor between the “+” pin and the pin for the status output that is being tested.
3. Connect a voltmeter between the “” pin and the pin of the output being tested (see Table 11-12).
4. Und
er
the DIAG SIGNAL I/O menu (See Section11.1.3), scroll through the inputs and outputs until
you get to the output in que
stion.
5.
Alternately, turn on and off the output noting the voltage on the voltmeter.
It should vary between 0 volts for ON and 5 volts for OFF.
11.4.10. CPU
There are two major types of CPU board failures, a complete failure and a failure associated with the Disk On
Module (DOM). If either of these failures occurs, contact the factory.
For complete failures, assuming that the power supplies are operating properly and the wiring is intact, the CPU
is faulty if on power-on, the watchdog LED on the motherboard is not flashing.
In some rare circumstances, this failure may be caused by a bad IC on the motherboard, specifically U57, the
large, 44 pin device on the lower right hand side of the board. If this is true, removing U57 from its socket will
allow the instrument to start up but the measurements will be invalid.
If the analyzer stops during initialization (the front panel display shows a fault or warning message), it is likely
that the DOM, the firmware or the configuration and data files have been corrupted.
07223B DCN6378