Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: W1Jrv on October 17, 2015, 03:04:33 am

Title: Fender GDEC-30 USB slot repair
Post by: W1Jrv on October 17, 2015, 03:04:33 am
the USB slot on this amp has died, like most of these type slots after much use.

anyone know of a DIY fix for this so i don't have to take it in for an expensive repair?
Title: Re: Fender GDEC-30 USB slot repair
Post by: shooter on October 17, 2015, 10:24:30 am
Is this your unit, so far I can't see USB for the forest!  :icon_biggrin:

http://support.fender.com/schematics/guitar_amplifiers/G-DEC_30_schematic.pdf (http://support.fender.com/schematics/guitar_amplifiers/G-DEC_30_schematic.pdf)
Title: Re: Fender GDEC-30 USB slot repair
Post by: PRR on October 18, 2015, 11:03:35 pm
USB connector is just four lines.

Dis-assemble until frustrated, or you see how to remove or hack onto the munged USB connector, add a new more robust connector. Also get a 3-pack of short USB cables. Put the cable into the amp and nail it there. Connect your whatever to the loose end of the cable. After much abuse, the cable goes bad, un-nail the first cable, grab the spare, nail it in for a while.

shooter's link is jaw-dropping. This is not an audio amplifier. It is a computer. There's a dollop of analog to get guitar into the ADC and CPU, a plop of analog to work the speaker and some other jacks. ALL control happens inside the CPU (and helper digi-chips).
Title: Re: Fender GDEC-30 USB slot repair
Post by: W1Jrv on October 19, 2015, 04:47:23 am
Quote from: shooter on October 17, 2015, 10:24:30 am
Is this your unit, so far I can't see USB for the forest!  :icon_biggrin:

http://support.fender.com/schematics/guitar_amplifiers/G-DEC_30_schematic.pdf (http://support.fender.com/schematics/guitar_amplifiers/G-DEC_30_schematic.pdf)

i can't either. thought it might show on pp3 of that schematic but i don't see it. appreciate the schematic link though.
Title: Re: Fender GDEC-30 USB slot repair
Post by: W1Jrv on October 19, 2015, 04:53:20 am
Quote from: PRR on October 18, 2015, 11:03:35 pm
USB connector is just four lines.

Dis-assemble until frustrated, or you see how to remove or hack onto the munged USB connector, add a new more robust connector. Also get a 3-pack of short USB cables. Put the cable into the amp and nail it there. Connect your whatever to the loose end of the cable. After much abuse, the cable goes bad, un-nail the first cable, grab the spare, nail it in for a while.

shooter's link is jaw-dropping. This is not an audio amplifier. It is a computer. There's a dollop of analog to get guitar into the ADC and CPU, a plop of analog to work the speaker and some other jacks. ALL control happens inside the CPU (and helper digi-chips).

i've seen hacks for smart phone USB connectors that go bad, vs getting a whole new phone.

i like you idea, i'll have a look at it and see if i can solder a new connector in there.

yeah that schematic is way diff looking than say a fender deluxe reverb for sure. all that DSP stuff going on i guess.  thanks
Title: Re: Fender GDEC-30 USB slot repair
Post by: shooter on October 19, 2015, 08:30:04 am
Quote
This is not an audio amplifier. It is a computer
my 1st thought when I looked at it was "Hell, fender stole the ISP computer board outta a GE MRI"
Title: Re: Fender GDEC-30 USB slot repair
Post by: PRR on October 20, 2015, 12:18:58 am
> "Hell, fender stole the ISP computer board outta a GE MRI"

Yes, except GE charges a lot more for it. (But throws in more video.)
Title: Re: Fender GDEC-30 USB slot repair
Post by: shooter on October 20, 2015, 08:30:03 am
 :l2:
Quote
except GE charges a lot more for it
The services guys had a saying about GE; "you can buy better, but you can't pay more!"