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Author Topic: Icom 756 ProII No output  (Read 257 times)
AJ4CU
Member

Posts: 78




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« on: December 13, 2007, 06:04:57 PM »

Hi all,

I own an Icom 756 ProII which has been performing perfectly until tonight, I powered up the rig and heard a VE6 I thought I'd like to work and stepped on the foot switch and noticed no more than around 5 watts output so I said to myself, self this is not good!
I reset the radio (factory reset per the manual) disconnected my I-mate, sound card interface, amp, mic and everything else, I connected a stock mic and connected the rig to my Bird dummy load and still no more than 5 watts out, I tried all modes and bands.

I opened the radio and found no burnt parts, checked all connectors etc...Re- assembled and tested still no joy....

Anyone else run across this problem?

If I need to provide more info please ask.

73  ES   CUL   DE   AJ4CU

Hari
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KZ1X
Member

Posts: 3228




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« Reply #1 on: December 13, 2007, 06:40:13 PM »

Put radio into RTTY mode, put suitable ammeter in series with power supply, and an accurate voltmeter across the radio at the input (you may wish to go inside the rig to get to a good point).  Turn TX power to maximum, key transmitter into dummy load.

Report back on:

Test equipment being used (make and model)
Voltage
Current
Power output observed
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K2CBI
Member

Posts: 58




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« Reply #2 on: December 14, 2007, 09:17:50 AM »

Hi Hari,

This happened to me too, summer before last, and it is not rare.  Apparently the power transistors (and a few others) took a hit from an electrostatic discharge. I  wasn't even aware that there had been a storm.  ICOM repaired it for about $250 +/-.  I think they made some modifications to make it less likely that this would reoccur.  

In any event I physically disconnect the antenna connector when I shut down.  Power supply goes to a big surge protector.

Mike,
K2CBI
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AJ4CU
Member

Posts: 78




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« Reply #3 on: December 18, 2007, 03:47:48 AM »

Hi Folks,

I decided to just send the rig to Icom in Wa, I am told they do a good job, in the meantime I picked up another Pro from a fellow ham so now I will have a nice SO2R station augemented with a 746 as well as my fire bottle rigs.


73  ES  CUL  DE  AJ4CU


Hari
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