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DANIELS

ELECTRONICS LTD.

TN100 System Installation and Troubleshooting

Operational Troubleshooting

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.

43 Erie Street

Victoria, B.C.

Canada V8V 1P8

TN100 Rev 3-0-0 Sep 08

Toll Free

Canada & U.S.A.

Phone:

1-800-664-4066

Fax:

1-877-750-0004

TECHNICAL NOTES

MT-3 Radio Systems

International

Phone:

250-382-8268

Fax:

250-382-6139

Internet

e-mail:

[email protected]

web:

www.danelec.com

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