Manual

PAGE 24 of 28
TROUBLESHOOTING:
POWER PROBLEMS
1). Unit is totally inoperative.
a. Check that units are receiving 120 VAC.
b. Make sure that the power supply unit of the DG-25III is turned “ON” and the LED is
lighted.
c. Push the Power Breaker[27] IN and release quickly to reset power on DG-25III.
2). Talkback totally inoperative.
a. Check fuse at rear of DG-MA. Unplug DG-MA from 120 Vac source before checking the
fuse.
3). No Microphone power.
a. Check for short on the DG-25III “A” terminals to “c” (ground). Remove short, If there is
still no + 15/VDC on the terminal, DG-25III power regulator maybe damaged.
AUDIO PROBLEMS
1). Loud sound in one zone causes alarm in another zone.
a. Microphone wires crossed between zones.
2). Talkback from DG-MA occurs in wrong zone.
a. Speaker wires crossed between zones.
3). Speaker monitors zones, but headphone does not.
a. Faulty headphone.
4). Zone microphone inoperative.
a. Check for + 15Vdc at microphone between terminals “A” and “C”.
b. Temporarily plug in the connector of a known working microphone from another zone to
the DG-25III Mic/Talkback 5-pin Header[24] of the inoperative zone to confirm that the
circuitry of the DG-25III is operative and to confirm that the problem is in the remote
microphone or cabling.
5). Zone speaker inoperative.
a. Check wiring from DG-25III and remote speaker. Check color coding.
6). No audio at speaker/headphone of DG-MA.
a. Check that the plugs of cable connecting DG-25III Audio Out Jack[28] and DG-25III
Input Jacks [41] on the DG-MA rear panel are making proper contact.
b. Check if the jumper cable between Audio Input Jack[38] and Audio Output Jack[39] is
present. Jumper cable must be left in place when no recorder is connected.
c. When used with a recorder interconnect cables. Replace recorder cables with factory
jumper at audio input/output jacks on the rear of DG-MA. If system works, recorder is
faulty.
7). Sonalert inoperative
A. Check position of Keyswitch[16].
LOUROE ELECTRONICS 6955 VALJEAN AVENUE, VAN NUYS, CA 91406 TEL [phone] FAX [phone]
Website: www.louroe.com Email: [e-mail]
(818)
INSTALLATION AND OPERATING INSTRUCTIONS
DG-25III 2/08