No audio on the F75

[markg]

Just so everyone knows.

If you're ever out in the field hunting without headphones (when it's extremely hot) and your audio quits working.
Cause and solution:
There's a small piece of dirt or debri stuck between the metal contacts that are located in the headphone jack. Solution is to plug and unplug the heaphone jack with the machine coil held over your head until clear. This will allow any dirt etc. to fall out of the machine.
I had been hunting for several day with the rain covers on the machine and dirt had collected in the cover and somehow moved into the headphone plug area.

 

[Phil]

I sent my detector back to the factory to get it fixed and it sure sounds like I had the same problem you did. Until you posted I thought the headphone jack was bad. Fisher replaced it even though they could find no problem. Good post, I just wish you had discovered it sooner. It was tough to do without my best field machine when there were still fields to be hunted.

 

[jim tn]

n/t

 

[ziphius]

I've had the same thing happen numerous times and 'regained' (ha ha) my audio by plugging and unplugging the headphones a few times, with the machine right-side up. I'm not convinced of the dirt on the contact theory yet, seems like something else was amiss. Just another bug in an otherwise great machine. Would someone please combine the F75 electronics with a sturdy Minelab Explorer design? Please.....please....please.

 

[markg]

When you plug in the 1/4" jack it breaks the contacts, which disconnects the speakers. This same thing is used on all audio electronics with external speakers attached.

 

[mikewaz]

I just bought a used F75 from Ebay and received it on Monday. After assembling it I turned it on just to make sure everything was operating okay. No problem until I plugged in the headphones....
dead silence.

I unplugged and plugged them in a dozen times and no luck. I saw the VID numbers popping up but I had no audio with or without the phones. The first thing that went through my head was I'd been ripped off. Turned out to be just a loose coil cable. Even though the VID was coming up which meant I had a coil connection obviously it also affected the audio. Tightened it up and no problems at all
since. Man I love this detector!!!

Mike

 

[garry a]

Thanks Mark