Bosch D7412GV2 - Page 92

D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
92 Bosch Security Systems, Inc. | 11/05 | F01U011024B
A B
Figure 52: RJ31X Wiring
Change the Two Phone Lines parameter to Yes.
Connect the affected phone line directly to the control panel
by bypassing the D928. Reset the control panel using the
Reset Pin. Wait for the Phone Supervision Time to expire.
4
5
8
1
T1
T
R
R1
RING (red)
TIP (green)
RJ31X
2
7
1
2
3
4
5
6
Did the phone line go into a trouble condition?
Replace the D928 Dual Phone Line Switcher.
Measure the TIP and RING voltage:
1. Place the phone in an off-hook condition.
2.
Set your digital multimeter to DC volts.
3.
Connect the red lead to TIP and the black lead to RING.
Refer to Figure 51.
4. Record the measured voltage.
Measure the phone line current:
1.
Disconnect the phone wire connected to Terminal 4 on
the RJ31X. Refer to Figure 52.
1 - RJ31X Jack
2. Set your digital multimeter to read current (mA).
2 - TIP
3. Connect the red lead to the disconnected phone wire,
and the black lead to Terminal 4 on the RJ31X.
3 - RING
4.
Place the phone in an off-hook condition.
4 - Telco connector block
5. Record the measured current.
5 - Outside telco
Refer to Figure 54 on page 93. Do your voltage and
current readings fall within the shaded area?
6 - Premises telephone
Figure 53: D928 Wiring Connections
Replace the control panel.
The voltage and current provided by the telephone line does
not meet the control panel’s specifications. Request the
telephone company to adjust the telephone line’s voltage
and current.
1
2
3
4
5
6
Figure 51: Control Panel TIP and RING Posts
PHONE
LED
RED
ON when
communicating
OFF when idle
PHONE LINE SEIZED
TIP
RING
TELCO
RING
TIP
PHONE LINE
SEIZED
TELCO CORD
MODEL D161
1
2
1 - TIP post
2 - RING post
1 - Black wire to control panel Terminal 9
2 - Green wire to control panel Terminal 1 or 2
3 - Connect to control panel ACCESSORY
connector with ribbon cable
4 - Phone jack to primary phone line’s RJ31X
5 - Phone jack to secondary phone line’s RJ31X
6 - Phone jack to telco connector