Teledyne API Model 401 O
3
Photometric Calibrator Instruction Manual, 01124, Rev. J1
9.6.4 Checking The DC Power Supply Board
A schematic and physical diagram of the DC Power Supply Board are shown on Drawings
00015 and 00016 in Appendix D.
The overall performance of the DC Power Supply Board can be checked by observing the value
of the DCPS test functions. If this value, a composite of five regulator outputs, deviates by more
than 10% from the value recorded in Table 1-1 of this manual under Test Values, the outputs of
the individual regulators should be checked by measuring for the following voltages:
1.
Remove Plugs J8, J6, and J13 from the front of the Power Supply Module. Verify that the
following voltages are present:
+24 VDC between J8 pins 2 and 4
+24 VDC between J6 pins 12 and 13
25 VAC between J13 pins 4 and 5
15 VAC between J13 pins 3 and 2
38VAC between J13 pins 6 and 7
WARNING
Hazardous voltage present on the power supply module.
If any of these voltages is not present, the Power Supply Module is defective and should be
replaced.
2.
Confirm that the following voltages are present on the V/F Board:
+5V between V/F TP 4 and V/F TP 5
+15V between V/F TP 1 and V/F TP 3
-15V between V/F TP 2 and V/F TP 3
+12V between Mother Board Pad J13,6 and J13,7
If any of these voltages is incorrect, it is probable that the DC Power Supply Board is faulty and
should be replaced.
9-13
