PAGE 44 TROUBLESHOOTING
10. TROUBLESHOOTING
Problem: I’ve hooked up the B1290 as per the installation instructions but nothing happens.
- Use a voltmeter to check that the power supply is properly connected. If an AC adapter is being used, it should
have an output of at least 12 volts DC with a center-negative power connector. If the DC power source is connected
to the RADIO terminal block, it should have the positive lead connected to terminal 8 and the negative lead to
terminal 7.
- Do not attach power to both inputs at the same time.
Problem: The B1290 will not program from a local programming phone.
- If you do not hear the voice prompt to begin programming, check that the programming phone is plugged into the
PGM jack and not the PHONE jack.
- If you hear the voice prompt to begin programming, but the B1290 does not register your entries, check that you
are using a tone phone. Sometimes a pushbutton phone actually sends dial pulses rather than DTMF. You can tell
the difference by listening in the earpiece; pulse dialing sounds like clicking, DTMF like tones.
- Check for the TONE LED on the front panel when a digit is being received. Some phones send short bursts of
tone rather than continuous tone while the key is depressed. If the B1290 is not detecting DTMF, try another phone.
- Check the setting of the receive level for the phone port. Since it is not possible to do this using the programming
phone, it will have to done with the programming software.
- Disconnect the RX input from the radio. Audio received from this input is summed with the audio from the
programming phone. If noise is being received, it will affect the decoding of tones and the programming of the
voices. The RX input should always be connected to squelched audio.
Problem: The B1290 does not dial out over the telephone line when an alarm occurs.
- Check that the phone line is plugged into the correct jack. The jack labeled PGM is for a local programming
phone; the telephone line should be plugged into the PHONE jack.
- Check that the telephone is dialing from the correct directory (Program Code 2). The B1290 has four separate
directories: A, B, C and D. Check that the telephone numbers are entered correctly in the selected directory, and
that the directory is not empty.
- Check that an alarm is actually present, as indicated by the LEDs on the front panel. In its default condition, the
B1290 expects to see a closure to ground at the alarm input. If your alarm inputs are normally closed contacts which
open on an alarm condition, this parameter may be adjusted using Program Code 5. The debounce can also be set in
this section. This parameter may be set to delay reporting an alarm until it has been present for a certain number of
seconds, in which case it will not recognize a momentary closure.
- Check the program cable. The B1290 (Version 1) will remain in program mode if the DB9 cable is still connected
to the unit. The alarm and RUN LEDs will flash when in this state.
Problem: The B1290 waits a long time before announcing the alarm over the radio.
- The B1290 will wait for one minute when the COS input is busy and then transmit anyway. This is done to ensure
that an open squelch on the radio does not disable the reporting operation. Check the Squelch Polarity setting to
make sure that it matches the operation of the radio’s COS output. If the COS input to the B1290 is left open the
Squelch Polarity should be set to 0 using Program Code 6.
- Check the alarm delay (debounce) parameter using Program Code 5. If a delay has been programmed, the B1290
will wait until the alarm has been present for that interval before reporting it.
- Check the directory programming to make sure that there is not an unwanted Wait command present.
Problem: The B1290 continues dialing even after the alarms have been acknowledged.
- The most common cause of this problem is fleeting alarms. They occur when the device reporting an alarm to the
B1290 gives a series of pulses on the contacts instead of a clean closure. If the problem cannot be corrected in the
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