Capacitor on 14U and 15U Smoking

clamhost · 5883

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Offline clamhost

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Reply #15 on: March 21, 2014, 12:17:05 PM
Just triple checked it, didn't do the grounding mod. The wires look good, but I can try resoldering them if it might help?


Offline Paul Birkeland

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Reply #16 on: March 21, 2014, 12:24:21 PM
Looking at the white wire more closely, it looks like there's about 3x the amount of solder that you would actually need to make a connection.  This excess of solder in and of itself could be part of the problem.

You can set your meter back to Ohms and measure the resistance between terminal 10 and the uppermost lug on the headphone jack where the white wire is connected.  This should be near 0 Ohms.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline clamhost

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Reply #17 on: March 21, 2014, 12:29:09 PM
2.45ohm when my meter was set to 20k. On the white wire in the headphone jack.


Offline clamhost

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Reply #18 on: March 21, 2014, 12:43:19 PM
Just removed some excess solder. Will test now.


Offline clamhost

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Reply #19 on: March 21, 2014, 12:45:17 PM
Left side still doesn't work lol.


Offline clamhost

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Reply #20 on: March 21, 2014, 12:45:44 PM
Amp is MUCH louder though. That is good news.


Offline Paul Birkeland

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Reply #21 on: March 21, 2014, 12:46:01 PM
Can you measure the AC voltage with that 60hz tone and the volume cranked between the chassis and the end of the white wire where it solders to the headphone jack?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline clamhost

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Reply #22 on: March 21, 2014, 12:55:44 PM
09.3 AC with my meter on VAC 200.


Offline Paul Birkeland

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Reply #23 on: March 21, 2014, 01:03:25 PM
If you have ~9V there, can you see if the tip of the headphone plug touches the metal on that connection with headphones plugged in?

Also, can you add a photo of the jack from the side with the terminals and resistors?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline clamhost

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Reply #24 on: March 21, 2014, 01:06:52 PM


Offline clamhost

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Reply #25 on: March 21, 2014, 01:12:39 PM
I also took a pic of my HD800 plugged in the crack.
http://imgur.com/oOjZNJP,736QZA0


Offline clamhost

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Reply #26 on: March 21, 2014, 04:37:15 PM
Help?


Offline clamhost

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Reply #27 on: March 21, 2014, 05:44:31 PM
I think the tip is touching the plastic internally.


Offline Paul Birkeland

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Reply #28 on: March 21, 2014, 08:09:24 PM
That looks pretty cooked, we can send you a replacement, just email replacement parts.


When you solder, take a wrap with the wire, then add just enough solder so that the space between the wire and the terminal has solder between it.  It is not necessary to fill the entire hole with solder, and putting solder up the wire does nothing but melt more plastic and make the construction process much tougher. 

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Grainger49

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Reply #29 on: March 22, 2014, 02:38:57 AM
You have just traced the audio signal path to, and I think through, the volume pot where it disappears at terminals 6 & 10. 

Note, this is a feat you couldn't perform before.  It is a logical straight forward troubleshooting technique.

Congratulations on your new skill.  It is amazing what folks learn here.


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