[amsat-bb] Re: No Help
ham at g4dmf.co.uk
Mon May 28 02:09:43 PDT 2007
At 01:11 28/05/2007, you wrote:
>What has happened to amateur radio? A week ago I put out a request for help
>for my 736R which I use for satellite work. As of this date I have received
>zilch,0,nothing in reply. Are there no more ham repair people out there or
>is everybody an appliance operator???? George W3VVP
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Not entirely on the 736R, but as a service engineer of many years,
problems with Florescent display brightness on VCR's has almost
always ended up as being dried out capacitors in the power supply.
The Florescent display is driven with a heater voltage and a lowish
HT voltage. Either of these could cause low brightness display. If
you have the circuit, on the diagram labeled CNTL UNIT F289...., the
invertor for these supplies are in top left corner. The suspect
components are C07, and C09.
Hope this helps. I didn't answer before, as I assumed someone with
more specific FT736 knowledge would.. if you dont have the diagram,
let me know off list, I'll scan an email it you. I maybe just on the
wrong track, but 2 $1 caps is worth a try!
G4DMF ( 736R owner and user ).
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