To Next PageTo Next PageHow to fix a program scan that does not operate on my Icom Receiver?
If the program scan does not operate on your Icom Receiver, it could be due to: * The squelch being open. Set the squelch to the threshold point. * The start and end frequencies being the same. Program different start and end frequencies.
What to do if memory scan does not operate on Icom Receiver?
If the memory scan does not operate on your Icom Receiver, it could be due to: * The squelch being open. Set the squelch to the threshold point. * Only 1 memory channel being programmed, or other channels are set as skip channels. Program other memory channels or cancel the memory skip function in the desired channels.
Why is there no sound coming from my Icom Receiver speaker?
If no sound comes from the speaker of your Icom Receiver, there might be several reasons: * The volume level may be too low. Adjust the [VOL] control to a suitable level. * The squelch level may be set too high. Adjust the [SQL] control to properly set the squelch level. * The selected tone or DTCS squelch may not match the received signal. In this case, turn the appropriate function OFF.
What to do if the frequency cannot be changed on my Icom Receiver?
If you cannot change the frequency on your Icom Receiver, the lock function may be activated. To deactivate it, push and hold [PWR• ] for 2 seconds after powering on the device.
Why is the sensitivity low on my Icom Receiver and only strong signals are audible?
If the sensitivity is low on your Icom Receiver, and only strong signals are audible, it could be due to: * A poor contact or short circuit in the antenna feedline or antenna connector. Check the connection, and if necessary, replace the feedline or reattach the antenna connector. * The attenuator function being activated. Push [ATT•PRIO] to turn the Attenuator function OFF.
What to do if my Icom Receiver receive audio is distorted?
If the receive audio on your Icom Receiver is distorted, the operating mode may not be selected correctly. Push and hold [MODE•SCAN] for 1 second, then rotate [DIAL] to select a suitable operating mode.
Why won't my Icom Receiver turn on?
If your Icom Receiver does not turn on, it may be because the AC adapter is not fully seated in the power jack on the rear panel. Check the connection to ensure it is properly connected.
Provides crucial safety warnings and precautions for operating the receiver.
Details the necessary information and format for ordering replacement parts.
Offers essential guidelines and warnings for performing maintenance and repairs.
Diagrams showing the top and bottom views of the Logic Unit board with components.
Diagrams showing the top and bottom views of the Main-A Unit board with components.
Diagrams showing the top and bottom views of the Main-B Unit board (PCR2500) with components.
Diagrams showing the top and bottom views of the UT-122 unit with components.
Detailed explanation of the receiver's RF and IF circuit stages and their functions.
Description of the Phase Locked Loop (PLL) circuits and their role in frequency control.
Explanation of how the UT-122 digital unit handles digital mode operations.
Details the various power supply circuits and voltage regulation for the unit.
Defines the function and pin assignments for the CPU ports.
Outlines the required test equipment and preliminary steps before adjustment.
Step-by-step guide for adjusting the Main-A Unit parameters.
Step-by-step guide for adjusting the Main-B Unit parameters for PCR2500.
List of components and part numbers for the Logic Unit.
List of components and part numbers for the Main-A Unit.
Top view layout of the Logic Unit board with component identification.
Bottom view layout of the Logic Unit board with component identification.
Top view layout of the Main-A Unit board with component identification.
Bottom view layout of the Main-A Unit board with component identification.
Top view layout of the Main-B Unit board (PCR2500) with component identification.
Bottom view layout of the Main-B Unit board (PCR2500) with component identification.
Top view layout of the UT-122 unit with component identification.
Bottom view layout of the UT-122 unit with component identification.
General
