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 Boss DF-2 Level problem
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 01/15/2009 :  13:06:57  Show Profile  Reply with Quote
Hi ppl,
I owe Boss Super Feedbacker&Distortion for 20 years. Lately, I have had a problem with sound level when I switch the pedal ON. The sound is much lower than when the pedal is OFF. Plz help

Dr. Bob
Moderator

Australia
6593 Posts

Posted - 01/15/2009 :  13:24:13  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi Markony

Welcome to the forum from Australia.

Can you remember, what happened to your DF-2 just before it started to sound different.

Just for now, try cleaning the input & output sockets.
This is a common problem with aging pedals that have been to many gigs.


Check that the nuts on the sockets are tight, if they are loose.
You might have to open up your pedal, & see if the sockets have rotated, & possibly shorted out to something inside the pedal.

Are you using it with a battery or REGULATED power pack?

Try it just on its own, no other pedals, & with leads that you know are good.
Does it still drop in level?

Do you know how to solder & read circuit diagrams, & have a multimeter?

Can I ask what part of the county you are from? I have some friends living over there.

Regards Dr. Bob
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 01/15/2009 :  13:48:47  Show Profile  Reply with Quote
Hi Dr.Bob

Used with battery on gigs and Regulated Power Pack at home.

I know something about solder & less about Read circuits.
Yes I have multimeter.


Im from Srebia, city of Jagodina, 133km south of Belgrade.

I have friends in Australia,they live in Sidney, Kanbera and some city like Paradise something
Paradise is more than nice name for city

Now,I will check pedal from inside, brb.
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 01/15/2009 :  14:28:18  Show Profile  Reply with Quote
Looks like OK from inside.
I check nuts on the sockets, sockets and pedalboard, no shortcuts finded.
I find circuit diagram for DF-2 and try to understand what is on diagram and what is that on pedalboard.
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 01/15/2009 :  14:58:26  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi Markony

Please clean the input & output sockets, with some spray contact cleaner, it sometimes fixes problems similar to yours.

Also check that the nuts on the pots are not loose,
I had an SD-1 here, and the level pot came loose, & intermittently shorted to the case inside.

The DF-2 is Sch. is here:
http://www.freeinfosociety.com/electronics/schempage.php?cat=1

You must be thinking of Surfers Paradise.
Laurie is from up that way.

Good luck with the DF-2.
Keep us up to date with your repair efforts & findings.

Regards Dr. Bob
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Laurie
Double Platinum Member

Canada
4854 Posts

Posted - 01/15/2009 :  16:26:56  Show Profile  Visit Laurie's Homepage  Reply with Quote
quote:
Originally posted by Dr. Bob
You must be thinking of Surfers Paradise.
Laurie is from up that way.


You are making me homesick....
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 05/05/2009 :  15:09:04  Show Profile  Reply with Quote
Hi ppl!
Here I`m after 4 months of hard work on my DF-2.
I was riding some books, buying some tools,... now I can read
http://www.freeinfosociety.com/electronics/schempage.php?cat=1 diagram ,
but DF-2 is not much better.
I change all electrolits and some Qs on main board.
After all, result was level of clean sound is same as level of effect sound with level pot on max. Good for start .
I take pedal to some expert, he make some good work and I was happy!
After 2 days of good work pedal got "stroke".Pedal is always on, light blinking on and no sound, just buzz,..., buzz,..., no sound,...,buzz. Some shortcut or something, don`t know...

I gonna make him to eat money that I give him for repair.
Wish me GL!
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 05/08/2009 :  21:38:52  Show Profile  Reply with Quote
It works now!
Problem was burned Q14 and missing C58.
Pedal works like new!
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 05/09/2009 :  08:46:53  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
quote:
Originally posted by Markony

It works now!
Problem was burned Q14 and missing C58.
Pedal works like new!


Hi Markony

Thanks for the update.
Missing C58?
Any idea how this might have happened?

Does it look like someone else has been "pretending" to be a Boss pedals technician?
Was there any other visible sighs or re-work?

Regards Dr. Bob
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Markony
Copper Member

Yugoslavia
8 Posts

Posted - 05/13/2009 :  10:35:50  Show Profile  Reply with Quote
Hi Dr.Bob,
As I said, I take pedal to "expert" to make my work better but he simply removed C58 from main board. After 2 days that cause Q14 malfunction .
I think so.

Yes, UR right they must B thinking that he is better then Boss technician. I make topic of his "good work" on Muzicki-Forum community site and He will B very soon out of costumers.
I donT wanna make some repairs on DF-2. I think of Q6 and Q7, mby they have some influence on level of output signal? Who knows?

I decide to make LPB and put him behind DF-2. Two effects on same switch. Linear Power Booster will make output level of effect as it should B.
Cheers!
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