One of the tuning scales is
Cause (a): The radio unit has two separate tuning scales and two tuners; one tuner for
FM and a second tuner for the other wavebands. Furthermore, the tuning knob operates both
scales. These tuning scales are driven by two thin cords; one for each tuner. If one of those
tuning scales does not work, one of the cords may have become tangled up or jammed, in which
case it will need to be untangled. This is a relatively uncommon failure.
Cause (b): The
fault may also be due to a failed tuning capacitor. If the tape unit has not been used for a long
time, or infrequently, the tuning capacitor attached to the end of the drive cord can seize
Cause (c): The
fault could also be caused by a broken or distorted plastic-covered link (gear wheel). That link
selects which of the two tuners is engaged. Once the link fails, you may only be able to turn the
tuning knob to engage the 'good' tuner, while the other tuner will not work properly.
Remedy: As (b)
and (c) are the most likely causes, have an experienced, skilled engineer check and repair these