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Technical Bulletin
If you do not have the loop-back diagnostic module, complete the following steps to
test the plotter's serial port:
1. Turn off the Summit.
2. Remove the serial cable from the back of the plotter.
3. Using paperclips or short lengths of wire, jumper pins 2 to 3 and 4 to 5. Make
sure you get the wires in far enough to make a good connection. The pinholes are
labeled on the plotters serial port hardware. The top row is 1 through 13, from
right to left, so the pins to jumper are:
13
4. Turn on the Summit while you hold down the "Sensor Test" key on the keypad.
Continue holding down "Sensor Test" key until Summit beeps and the light flashes
three times. This places the plotter in the serial diagnostic mode.
5. Press any "Arrow" key on the plotter keypad. This emulates the transmitting and
receiving of characters. The Summit should beep and the light should flash each
time an "Arrow" key is pressed.
6. Turn off the Summit after the test. This will take the plotter out of the serial
diagnostic mode.
7. Remove the jumpers from the serial port.
If this test passes, then the serial port of the plotter is communicating properly.
12
11
10
9
25
24
23
22
8
7
6
5
21
20
19
18
Plotter Port Test/Summit
4
3
2
1
17
16
15
14
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