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Model IDA1000A DC Remote Adapter Installation and Service Manual
The signal exiting U2c is fed through the line output adjustment, pot 2 and gated through U3a to the mic
hi input to the base station on P1-12.
Maintenance
Troubleshooting the Model IDA1000A DC Remote Adapter
The following is a list of potential problems you may encounter and possible solutions.
Problem
general problems
IDA1000A will not key
the radio
radio keyed constantly
while the IDA1000A is
connected
RX audio low or
distorted
constant white noise in
RX audio
no RX audio
no TX audio
TX audio distorted
IDA1000A does not
transmit or receive
P:\Radio Products-Current Release\43004\43004-027B\43004-027B.docx
06/18
Possible Solution
Ensure that there is a valid circuit line path from the desk set to the dc
remote adapter.
Check for a blown fuse and ensure that the dc remote adapter is
connected to a properly functioning dc power source (if using a dc power
supply option).
Ensure that one of the IDA1000A PTT outputs is connected to the radio.
Check the telephone line continuity from the desk set to the remote
adapter.
Reversed phone line pins 3 and 4.
Ensure that the telephone line is generating a current that the IDA1000A
uses for keying the radio.
Ensure that the PTT is in the proper active state:
P1-6 Ground keying
P1-13 B+ keying
Ensure that the IDA1000A receive sensitivity is set properly.
Ensure that there is no more than 20 dB loss in the telephone line.
Obtain RX audio from a muted source in the station and not 'raw
detector/disc. audio. See radio manuals.
Check fuse F2
Check radio cable connections to radio's RX audio source.
Verify that the radio is being keyed when transmitting to the IDA1000A
from a dc remote.
Verify that the IDA1000A output level is properly set and there is not
more than 20 dB of loss in the telephone line.
Open fuse F2. (See fuse replacement information below.)
Verify that the dc adapter transmit audio output is not set too high for the
radio's expected input level. Adjust the TX audio level pot for proper
setting.
TX level is set too high or SW1-2 is set to wrong position.
Ensure that there is a telephone line audio path from the IDA1000A to the
dc desk set.
Pub. 43004-027B
Page 18 of 24
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