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If you have a 9VDC power supply, skip to the Ringer Test on page 14.
RINGER TEST (Using a 9 Volt Battery)
Test Equipment Needed
• 9 volt battery (not provided). Use a fresh alkaline battery.
• 9 volt battery snap.
Testing is done with a 9 volt battery. To conserve the battery, it should be connected for only short periods of
time and disconnected whenever tests are not actually being performed.
Since capacitor C1 blocks the DC voltage, it is shorted for this test (Figure B on page 11).
1. Set the ringer switch to the OFF position (refer to Figure 6-2b).
2. Check to see which modular jack, type A or B, has been included in your kit.
If you have type A, then use Figure 6-4a for testing. If you have type B, then
use Figure 6-4b for testing.
3. Solder the red and black wires from the 9 volt battery snap to the wires of the
modular jack as shown in Figure 6-4a or Figure 6-4b.
4. Put the 9V battery into the battery snap. Be sure that the telephone cord is plugged into your modular jack.
Set the ringer switch to ON (toward the center of the PC board). You should hear a 3kHz tone from the
buzzer. If no tone is heard, unplug the telephone cord from the modular jack and:
a) Check that the battery snap is connected with the right polarity as shown in Figure 6-4a or Figure 6-4b.
b) Check that the buzzer is wired as shown in Figure 6-3. Check that the telephone cord wires are
soldered correctly.
c) Check that transistor Q1 is a 9014C and is mounted with the emitter, base and collector leads as
shown in the assembly instructions.
d) Check that R5, R6 and R7 are the correct values.
e) Check for bad solder joints and solder bridges.
5. Put the ringer switch to OFF (toward the edge of the PC board). The 3kHz tone should stop. Put the ringer
switch back to ON.
6. Unplug the telephone cord from the modular jack. Cut the leads from C1 (see Figure B on page 11). This
removes the short from capacitor C1.
7. With the ringer switch ON, reconnect the telephone cord to the modular jack. Since the capacitor now blocks
the DC, no tone is heard from capacitor C1.
8. Unplug the telephone cord from the modular jack.
9. Peel the backing off of the buzzer side of the buzzer pad and place it on the buzzer as shown in Figure 6-6a.
The pad goes directly on top of the three buzzer wires. Peel the second backing off of the buzzer mounting
pad and stick the pad onto the solder side of the PC board as shown in Figure 6-6b. Note: When mounting,
be sure that you allow room for the Pulse/Tone Switch and Hook Switch.
10. Continue to the Transmit-Receive Section on page 15.
Red
Black
Green
Red
Black
Red
Red
Type A
Modular Jack
Green
Type B
Modular Jack
Figure 6-4a
Figure 6-4b
-13-
Type A
Type B
Green
Red Red
Green
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