DANIELS
DANIELS
ELECTRONICS LTD.
ELECTRONICS LTD.
TM
TM
TN100 System Installation and Troubleshooting
MT-3 Radio Systems
1.0
Motherboard
1.1
Modules Do Not Fit in Subrack
1. Check the guide rail positions (refer to the SR-3 subrack instruction manual). Relocate the guide rails
if required.
2. Check the connectors on the back of the module for bent pins. Carefully straighten any bent pins if
required.
1.2
No Supply Power
1. If a system monitor is part of the radio system, a quick check for power is to turn the audio switch to
either A or B. If the LED turns on, power is present.
2. Inspect all power connections for continuity, polarity, etc.
3. Check the fuse on the M-3 Motherboard and replace if necessary (standard 15 amp fast blow). If fuse
blows again go to section 1.3.
4. Check any fuses outside of the radio subrack(s) and replace if necessary. If fuse blows again go to
section 1.3.
5. Check the subrack power input (terminal strip J8) and any batteries and/or power supplies for correct
voltages. There should be +10 to +17 Vdc at the power input.
6. Measure the battery voltage at the system monitor if one is installed. Select the supply voltage func-
tion on the system monitor rotary switch and measure the voltage at the front panel test jacks. There
should be +10 to +17 Vdc at this point.
7. If a system monitor is part of the radio system, jumper JU40 is usually not installed. Power is then
routed through the system monitor. If the system monitor is not plugged in, the other modules will not
have power. Ensure the system monitor is installed correctly.
Operational Troubleshooting
Page 5 of 9
43 Erie Street
Toll Free
Canada & U.S.A.
International
Internet
Victoria, B.C.
Phone:
1-800-664-4066
Phone:
250-382-8268
e-mail:
Canada V8V 1P8
Fax:
1-877-750-0004
Fax:
250-382-6139
web:
www.danelec.com
TECHNICAL NOTES
TN100 Rev 3-0-0 Sep 08
© Copyright 2008 Daniels Electronics Ltd. All rights reserved.
TT
hh
iiss
pp
rroo
dd
uu
cc
tt
hh
aa
ss
bb
ee
ee
nn
dd
iiss
cc
oo
nn
ttii
nn
uu
ee
dd
aa
nn
dd
iiss
nn
oo
lloo
nn
gg
ee
rr
mm
aa
nn
uu
ffaa
cc
ttuu
rree
dd
bb
yy
DD
aa
nn
iiee
llss
EE
llee
cc
ttrr
oo
nn
iicc
ss
LL
ttdd
..
