Pages: [1]   Go Down

Author Topic: Icom 756 Pro II No Receive ( PLL )  (Read 94 times)

AJ4UY

  • Member
  • Posts: 49
Icom 756 Pro II No Receive ( PLL )
« on: September 28, 2022, 09:33:35 AM »

Hello members -

Have you seen the symptom of an ICOM 756 pro ii with No Receive. No S Meter reading.
When I monitored the PLL primary signals with a quick sweep of the oscilloscope, all were present, except the " Marker " signal. Per Service Manual Adjustments page - this 4.0 v pp signal should be present at all times. (?)
No Marker signals.
It appears IC 1101 is not generating the " mkrs " signal. I did see a 16 MHz signal @ one input of the three input AND gate ( IC 192 ? ) next to and associated with IC 1101 and these marker signals. However, the other two inputs were @ low level.
Anyone been in this area prior ? ? ?

AJ4UY, Monday at 1:15 PM
AJ4UY

Logged
Pages: [1]   Go Up