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Fender Hot Rod Deluxe Amp Repair Video Part 2
By Gary | March 21, 2008
In this amp repair video, I’m showing how to clean the pots. Just a little spray into each (small opening in the pot casing) and then work the knob.
I WOULD RECOMMEND TURNING OFF THE AMP AND UNPLUGGING FROM THE WALL FIRST.
Clean the jacks also and make sure they are nice and tight to the feel. By that I mean plug in and out the guitar chord to make sure there is a tight grip. If not, I recommend changing the plug which will require solder/unsolder chops on these units. Notice the soldering video, I will cover unsoldering in another video.
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Topics: amp repair (Fender), amps (Fender, Blackheart) |
July 14th, 2008 at 1:55 am
Hi Gary,
I just bought a Fender Twin off some guy. It hums loud even while not playing and makes a huge clashing sound as if a symbol is being hit. Can’t find info on the clashing sound anywhere. Seems to happen more when the amp moves. It is in casters.
Thanks,
Tom M
Las Vegas
July 14th, 2008 at 2:00 am
Hello,
Sounds like your reverb pan in the bottom is plugged in backwards…the two silver RCA plug cords on the back panel, try unplugging, notice where they are,,write it down if you need to…switch them… hopefully amp works correctly now…
other than that, you have problems,,,
some twins the reverb line cords could be grey, one I believe will have a red ending…also make sure they are plugged into the reverb send/receive jacks,,
Gary
July 19th, 2008 at 2:02 pm
you were absolutely right. I fixed it. Now I here a buzz though very loud with nothing plugged in, any ideas?
Tom
July 19th, 2008 at 2:10 pm
On the amp, are you saying, now it works but you have buzz…with nothing plugged in?
Is the buzz too loud to deal with or is it tolerable?
Could be the wiring of the room you are in
Could be the amp is not grounded correctly, see if there is still 3 prongs on the AC cord,,if there is great,,switch the ground on the switch on the back..
If it still buzzes too loud, you may have real problems…could be someone went into it trying to figure it out and didn’t hook it up right when they put it back together, thus the reverb wires were backwards….make sure it is not your guitar or guitar cord causing the hum.
can’t think of anything else right now, other than take it to another building and try it.
Gary
August 21st, 2008 at 9:09 am
hi,Gary…thx a lot for the video..i love it…thx!! btw, i just want to ask your advice for my amp’s problem : the volume is decreasing suddenly in both channel: clean and lead channel and it always synchronized…(if my clean channel volume is decreasing, the lead channel is also decreasing,..visa versa..) it sounds like that there is a sound that want to goes out but it can’t … this problem came in no precise time and paroxysm…sometimes in the middle of my playing and sometimes it already came just as i start turning on the amp volume…
i have tried to isolate the problem by using my amp’s “return” to know if the damage is on the preamp or power amp, but i think the power amp is still ok..(the “master” volume is still in perfect condition and no volume decreasing there)….
i also use another guitar and cable or even using another amp to find if the problem is on my guitar or cable but i found that my guitar and the cable are just fine…i also always keep my amp away from the wall to keep a proper ventilation for my amp..
and then, yesterday, i found that i can have the volume back to normal if i turn the volume knob to the maximum position or strum really hard to the strings of my guitar…so as an example: if i have my volume decreasing in some position(x position), then i can fix it if i turn the volume knob to maximum position and the amp volume is back to normal…(if i turn the knob to x position again, the volume produced by my amp is normal for the x position again) ……but then i found also that it won’t stay long, the problem will come again and again…
what happened with my amp?
August 21st, 2008 at 9:13 am
oh ya, some people suggest me to clean the input and the pots with the contact cleaner..but how should i apply the contact cleaner to the input?in your video, i realize that u are applying the contact cleaner by spraying the jack..but some website, told me to spray the input socket n jiggling it with the jack..is it ok to do that?
and also, should i always open my amp’s case for cleaning the pots like you do in that video?
thx u
September 2nd, 2008 at 5:02 pm
Hello,
Sorry I missed your questions. I “sounds” like you have a loose component in the preamp section somewhere. On those units it could be near the tube, like say a resistor that feeds the plate voltage on an input tube. They are famous for pulling away from the circuit board over time because of heat. Could be anything really. I’m not sure where you are on the tech chops. Finding the problem may not be that hard, getting the board out to resolder the component correctly takes a bit of skill.
On the pots, it doesn’t hurt to spray into the shaft, I just spray the jack and then work the jack back and forth to scrape/clean the connections. Also use top of the line cleaner especially for this type of work.
Gary