Tektronix 73A-308, User Manual

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73A–308 Page 65
Banks 1 thru 9 – Perform the following for all the remaining groups:
Connect the 15 resistors to the output pins of the next Bank to be checked and insure
that the positive (+) side of the +5 V is connected to the input pin for that bank: P4 pin-50
for banks 0, 1 and 2, P4 pin-17 for banks 3, and 4, or P5 pin-50 for banks 5, 6 and 7, P5
pin-17 for banks 8, and 9.
Perform the test requirements from number 4 thru 48 of the Bank 0 Test, substituting the
appropriate group and relay numbers in the CB and O commands. The voltages read must
meet the requirements of the Bank 0 Test.
High Voltage Test
1. Send “R;E;D
lf
” (Reset, enable and then disable all outputs) to the 73A-308.
2. Connect one end of a 165 , 15 W resistor to a +50V power supply and also connect
the +50 V to P4 pin-50.
Connect the other end of the resistor to P4 pin-36, Relay Driver 0. Connect the
ground from the +50V power supply to P4 pin-4 and 5.
The +50 V power supply must be capable of producing 300 mA.
3. Send “C0
lf
” (Close Relay Driver 0) to the 73A-308.
4. Measure the voltage at P4 pin-36. The voltage will be the same as the +50 V source.
5. Send “E
lf
” (Enable all outputs) to the 73A-308.
6. Measure the voltage at the P4 pin-36. The voltage will be less than +500 mV.
7. Send “R;E;D
lf
” (Reset, enable and then disable all outputs) to the 73A-308.
8. Connect the 165 , 15 W resistor from the +50 V power supply to P4 pin-40, Relay
Driver 8.
9. Send “C8
lf
” (Close Relay Driver 8) to the 73A-308.
10. Measure the voltage at P4 pin-40. The voltage will be the same as the +50V source.
11. Send “E
lf
” (Enable all outputs) to the 73A-308.
12. Measure the voltage at the P4 pin-40. The voltage will be less than +500 mV.
13. Send “R;E;D
lf
” (Reset, enable and then disable all outputs) to the 73A-308.
14. Connect the 165 , 15 W resistor from the +50V to P4 pin-43, Relay Driver 16.