|
Symptom:
|
|
No TX output.
|
|
|
Probable Cause:
|
Bad Q32 on RF unit.
|
|
|
Cure:
|
Replace Q32 (2SC4673D) on RF unit. Also check for leaky D37 (MA862) on RF unit.
|
|
|
|
|
|
Symptom:
|
|
Raspy RX audio when warm, sounds like intermodulation.
|
|
|
Probable Cause:
|
Leaky D37 on RF unit.
|
|
|
Cure:
|
Replace D37 (MA862).
|
|
|
|
|
|
Symptom:
|
|
TX LED indicator does not light.
|
|
|
Probable Cause:
|
R105 on SW-A unit has been knocked loose during shipping.
|
|
|
Cure:
|
Replace or resolder R105 (1.8k)
|
|
|
Remarks:
|
R105 is a surface-mount component.
|
|
|
|
|
|
Symptom:
|
|
Harsh TX CW note.
|
|
|
Probable Cause:
|
Unit needs factory update.
|
|
|
Cure:
|
Change value of tantalum capacitor C18 on IF unit to 3.3uF, 16v.
|
|
|
|
|
|
Symptom:
|
|
Radio is dead-does not power-up. Radio powers up if VCC line to PA is disconnected.
|
|
|
Probable Cause:
|
Shorted PA FETs.
|
|
|
Cure:
|
Replace PA FETs.
|
|
|
|
|
|
Symptom:
|
|
Display dims in CW TX when AF volume is turned up.
|
|
|
Probable Cause:
|
Unit requires factory update to logic unit.
|
|
|
Cure:
|
Contact Icom Technical Support for update procedure.
|
|
|
|
|
|
Symptom:
|
|
In new radio, rotary encoder shaft does not turn smoothly; feels rough.
|
|
|
Probable Causes:
|
1) Inadequate lubrication in rotary encoder. 2) Shipping damage to rotary encoder.
|
|
|
Cure:
|
Replace rotary encoder.
|
|
|
|
|
FAQ Index Page | Amateur Radios
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©1997 ICOM America, Inc. The ICOM logo is a registered
trademark of ICOM, Inc. All ICOM radios significantly exceed FCC
regulations limiting spurious emissions. All stated specifications are
subject to change without notice or obligation.
