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If you have a 48VDC power supply, skip to the Dialer Test on page 25.
DIALER TEST (Using a 9 volt battery)
1. Be sure that the telephone cord is connected to your modular jack. Be sure that the telephone is off the
hook (hook switch not depressed).
2. Switch tone/pulse switch to the tone position.
3. Put the receiver to your ear and push the "1" button. You should hear a click. This is the result of the loop
current being turned off and then back on.
4. Push the "2" button. You should hear a click.
5. Press each of the remaining numbered buttons including the " * " and "#" buttons to verify that each is
operational.
If any of the above tests fail, then unplug the telephone cord from the modular jack and:
a) Check that the keyboard buttons are seated properly on the contact pad.
b) Check the HM9102 IC. Be sure that it is installed with the alignment notch as shown in the assembly
instructions.
c) Check that diodes D5, D6 and D7 are installed with the polarity markings as shown in the assembly
instructions.
d) Check the ribbon cable for broken wires, check switch S3.
e) Check for bad solder connections and solder bridges. Look closely at the IC and the ribbon cable. The
pads on these components are very close.
6. Switch the tone/pulse to the pulse position.
7. Put the receiver to your ear and push the "1" button, you should hear a click. Push the "2" button, you should
hear two clicks. Press each of the remaining numbered buttons (from "3" to "0") to verify that each is
operational.
8. If any of the above tests fail, unplug the telephone cord and check switch S3 and the IC.
9. Unplug the telephone cord from the modular jack and move on to the Final Assembly on page 26.
The automatic redial function doesn't work for test using 9 volt battery.
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