Troubleshooting
Console Interface Adapter (TC4420)
Summary: Test the interlace board communication function without the TC4400 Call Control Console
connected using this procedure. The main program sends an ASCII M to the console every 15
to 20 seconds: This procedure determines if the Console receives and echoes this signal back
through the Interface Adapter to the TClV. If the echo is not received, an error count is incre-
mented at Location Code 57364.
Step 1. Turn TCIV
Power Off.
Step 2. Move the TC4420 jumper
J3, located
next to the edge terminals
M
and Z, from NORMAL to
TEST. Remove the Console Interface Adapater Board if necessary to access the jumper.
Step 3. Remove the field wiring from pins CS and TS and jumper these two pins together.
Step
4.
Turn TCIV
Power On.
Step 5. Refer to the Programming Section and set location Code 57364 to 0; wait for one minute and
then read the value in Location Code 57364 again. If Location Code 57364 is still set at 0, the
interface board is working.
Step 6. Turn TCIV
Power Off.
Step 7 Place the
J3
jumper back to the NORMAL position, remove the jumper from pins CS and TS
and reinstall the field wiring to those pins; then, set the TCIV
Power On.
LCD Display Problems
Step 1. Dial #20. This will ensure the display has been initialized (required if the display is powered
up after the TC4001).
Step 2. Adjust display phone viewing angle control for an image on the display.
Step 3.
If there is still no display, take the phone to the rack and connect the
black
and yellow wires
to one of the
LCD
drives on the
MI0
to obtain 12 Vdc (black is positive). If no display, verify
the voltage is present and the display has been properly connected.
Step
4.
If still no display, connect a small speaker to one of the LCD drivers through a capacitor and
place a call which will cause that driver to update the display (refer to the Programming
Section). The speaker will provide an audible indication if data is being supplied to update
the display.
