Thanks. I'll probably e-mail them to see if they have any suggestions, aside from shipping the unit and paying for a repair job. They're in Delta, BC, which is almost 300 miles from my location.
That didn't work, either. Some other part must be faulty, or maybe the power supply, which is only two years old.Don't know if anyone already said this but the board mount solder joints for the DC power jack tends to become loose. Try wiggling the line jack (gently) while attempting to engage the power button and see if it catches. I myself have this trouble and have something wedged between the jack board mount and something behind it. Works fine now.
Well, this is actually my second power supply, which I bought only two years ago when the first one died. It hasn't been used more than a year all told, because I had stored it away along with the R75 when finding the portable sufficient for my needs, more compact and a lot less noisy. I had only put the R75 back in action a few days ago out of curiosity.You may just be looking at a tired old supply that wants to live, but other than being able to burn out a 3v bulb, when real work is being asked of it, it crashes the voltage. Grab a multimeter and see. The good news is that you can adapt the original cable to a new supply.
This is not uncommon for power supplies which spend most of their life being "ON" 24/7 for most of their lives to finally just crap out suddenly when power cycled from a move, etc.
Sorry to hear, GB46. Was hoping your trouble would've been an easy fix like that. A downed radio sucks bigtime, I know it personally. I hope you find 'er fixed soon.That didn't work, either. Some other part must be faulty, or maybe the power supply, which is only two years old.
Thanks, ridgescan. Meanwhile, my portable is bringing in just as much on the HF bands -- make that "as much of practically nothing", considering current conditions and my location.A downed radio sucks bigtime, I know it personally. I hope you find 'er fixed soon.
Martin, the relay normally clicks as soon as a live power supply is connected to the radio. This is before the push button is pressed to turn on the radio. That's the click I no longer hear. So if the power button were faulty, I'd still be able to hear the relay. I searched the entire service manual for relays, and could identify only three. They are for the standby, antenna switching and attenuator functions. None of them seem to be directly in line with the power switch.It's a hideous schematic diagram but going by what has been said so far I would be suspecting the pushbutton on/off or the power relay that you say doesn't click anymore. Now that you have a multimeter you should be able to trace where the 12volts goes and where it stops going - if you see what I mean.
If that's the case, the relay should be clicking in even without pushing the power switch. This is the way it has always worked. Starting from when the radio was connected to the power supply and the power supply was not yet turned on: As soon as the power supply was turned on, the click was heard. The radio would still be off at that point, and standing by for the power switch to be pressed.Sorry to hear that, but don't give up just yet!
That 15ma of current being drawn shows that it isn't totally smoked, but just in "standby" awaiting a power switch push which never comes.
There are no optional filters installed, but it does have the DSP unit, which I had to install as an option, only to find out later that the radio had started to be offered with the unit included.I suppose worst case you could part it out, like if you have any optional filters installed, or offer it up as a "parts only" radio.
The electrical circuit I was using during the test was the same one that is currently successfully powering this computer, as well as the adapter for my portable radio. There's 120 volts at every outlet in this apartment except for the 240 volts for the kitchen stove. Also, the power supply could hardly have produced its rated voltage if there were something wrong on that circuit.Sorry, but have you verified that the electrical outlet you are using is working and providing the proper voltage? Try plugging another appliance into the same outlet, or try your R75 on a different house circuit.