Page 48
Model 256/PC Instruction Manual
MODEL 256/PC HARDWARE CHANGES
REMOTE OUTPUT SIGNALS
Two output signals are provided for controlling external devices through unused pins on the
printer/serial connector. The pins are connected to the CPU board where jumpers may be
installed to activate the signals. Refer to figure 14 for jumper locations. The output signals are:
Pass/Fail and End of Test and are brought out on pins 24 and 25 respectively. A jumper is also
provided for sup5vdc at pin 23. The pin assignment and the labels used on the CPU
board are as shown below:
Function
Standard
Jumper Setting
Alternate
Jumper Setting
Pass/Fail W1
Pin
24
W4 Pin
24
End-of-Test W2
Pin
25
W5 Pin
25
Ground -
Pin
7
- Pin
7
+5vdc W3
Pin
23
W3 Pin
23
NOTE
Early Model 256 and Model 256/PC testers were originally setup as
shown under the Standard Jumper Setting. The Alternate Jumper
Setting, using W4 and W5 in lieu of W1 and W2, outputs the signals on
the same connector pins as the Model 512 jumper settings. Refer to
Figure 14 for jumper locations.
END-OF-TEST
PASS/FAIL
(Passed)
PASS/FAIL
(Failed)
2 ms
2 ms
15
ms
NOTE
Timing is approximate and can vary between testers.
Содержание 256/PC
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