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nebo_81
Copper Member
Singapore
19 Posts |
 Posted - 08/27/2005 : 21:18:36
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I've got afew pedals which switch on automatically when i switch on the power supply ...
namely DS1 (both modded and unmodded, XT2, DD3, GE7
wonder if any of you guys face the same problem ?
and if there's anyway to rectify this ?
it's kinda irritating to switch on the adaptor, den tap dance to switch off all the pedals that light up. |
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arcanon1313
Silver Member
USA
414 Posts |
Posted - 08/28/2005 : 00:41:07
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I get the same thing with my PH-2,SD-1,CS-2,and my CE-2. it's just something you'll have to live with. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 08/28/2005 : 00:42:21
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| Yes, I've seen this happen if I unplug the adapter and plug it back in again. Not sure what makes some pedals power up in the on position and others not. |
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boss freak
Gold Member
USA
663 Posts |
Posted - 08/28/2005 : 03:42:09
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| I have a few that do his also. I can't remember exactly which ones do this, but I know there are a few. I wonder if there's a way to modify the pedal to stop this or to make it happen on others if that was what the user desired. |
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pawnshop_trash
Gold Member
USA
603 Posts |
Posted - 08/28/2005 : 06:53:15
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I've wondered about this too... does whether or not a pedal is 'on' when the AC adaptor is switched on realted to whether or not a battery is also connected to the pedal?
for example, tonight I hooked up 4 pedals (PQ-4 -> SD-1 -> Ph-1r -> DD-3; I had a lot of fun using just the DD-3 w/ an Echoplex-esque slapback setting, and pretending I was East Bay Ray/Dead Kennedys) to a PSA + daisy chain. when I turned on power to the adapter at the surge supressor, only the SD-1 and PQ-4 came on, but they were also the only 2 of those 4 pedals that also had a battery inside. I'll try to experiment further with this tomorrow, also with my bass pedalboard.... |
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lightburst
Silver Member
Germany
158 Posts |
Posted - 08/28/2005 : 09:52:33
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I�ve found this solution on the website of JPL AUDIO
http://www.jpl-audio.com
"If you have a BOSS pedal that powers up in the "on" state but you want it to power up in the "off" state simply reverse the positions of the transistors in the flip flop circuit and the pedal should now power up in the "off" state. Of course the opposite applies for a pedal that powers up in the "off" state."
I�ve never did this mod so I don�t know if it works  |
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arcanon1313
Silver Member
USA
414 Posts |
Posted - 08/28/2005 : 18:42:14
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| I just remember to power up my pedals, and turn the ones that power up in the on position off before I turn my amp on. |
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Goran
Double Platinum Member
Sweden
2203 Posts |
Posted - 08/29/2005 : 15:04:14
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My EH-2 light up/turns on when i put cables in the out or in-put, or when I put a powe-supply-cord in.
In a pedal chain it light up when putting cables in other pedals... a bit irritating... |
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maniacally_cool
Silver Member
Philippines
212 Posts |
Posted - 08/29/2005 : 15:49:27
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as of now, i got a ds1, xt2 and tw1 that light up when plugging the adaptor. well, in any case, no big deal for me. :)
by the way, i have a boss DM3. there's a little problem, i think. when it is daisy chained with other effects, it works the way it should work. but when it's the only one powered by the adaptor. the led is dim and and when i increase the repeat rate knob, the led gets dimmer until its almost off. it still delays but not the normal kind of delay. can't seem to get what's wrong with the pedal.
thanks |
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cimed8085
Bronze Member
Australia
78 Posts |
Posted - 08/29/2005 : 16:24:15
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it's because you're using a PSA adaptor with an ACA operated pedal. It's a bit hard for me to explain here, but we have thread in this forum that explains your problem.. here it is..
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=122 |
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maniacally_cool
Silver Member
Philippines
212 Posts |
Posted - 08/30/2005 : 11:52:40
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| oh, i see. thanks very much for the info. right now, im using a 1spot adaptor. |
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Lukas
Copper Member
Italy
7 Posts |
Posted - 08/31/2005 : 11:29:17
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quote:
Originally posted by lightburst
I�ve found this solution on the website of JPL AUDIO
http://www.jpl-audio.com
"If you have a BOSS pedal that powers up in the "on" state but you want it to power up in the "off" state simply reverse the positions of the transistors in the flip flop circuit and the pedal should now power up in the "off" state. Of course the opposite applies for a pedal that powers up in the "off" state."
I�ve never did this mod so I don�t know if it works
Hi lightburst!
I cecked the site you suggested but I didn't find the text you quoted. Please can you tell me something more precise to find the way to apply that mod in order to have my CE-5 and DD-3 power up in the "on" state? I have them always connected to a PA system packed in a close rack so, since I have no need to set them up every time I play, it would be much more confortable if I could use them without open the rack every time to set them to the "on" state.
Thanx a lot
Lukas |
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boss freak
Gold Member
USA
663 Posts |
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Lukas
Copper Member
Italy
7 Posts |
Posted - 08/31/2005 : 12:24:13
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quote:
Originally posted by boss freak
It's here http://www.jpl-audio.com/diy.html on the left side of the page: "Always ON Mod"
Thanx Boss Freak!
I have found it and downloaded the pdf file. This is a different mod since it tells to remove a transistor to have your pedal ALWAYS on (i.e. excluding the swich).
What lightburst quoted is a mod to invert the behavior of the pedal so that it powers up in the "on" state instead of the "off" (or vice-versa).
Lukas |
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Lukas
Copper Member
Italy
7 Posts |
Posted - 08/31/2005 : 12:30:07
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Ops... I know that the text that lightburst quoted comes from the last part of the pdf file, but I need a way to understand what transistors I have to switch on the PCB of my pedal...
I made some searches but I didn't succeed in finding a CE-5 schematic diagram... And I am not an expert in electronics...
Lukas |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 08/31/2005 : 13:27:52
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Here's the schematic for the AC-2: http://www.bossarea.com/test/BossAC-2.gif
The AC-2 hasn't been mentioned in the discussion but the flip flop circuit is pretty much identical on all pedals so we can use it as an example.
The flipflop can be found down in the right corner. It consists of Q1 and Q2. The idea of the flipflop is that only one of the 2 transistors can conduct at the time. The transistors and the componants that support them are identical on either side of the flip flop. Which transistor will conduct at power-on will therefore be somewhat random from pedal to pedal. If Q2 starts conducting first, the pedal will power up in the on position. If Q1 conducts first, the pedal will power up in the off position.
A NPN transistor usually starts conducting when the base-emitter voltage raises above 0.6V - 0.7V. There will always be some difference between transistors of the same type so on some pedals Q1 will start conducting at a lower voltage than Q2 and vice versa. The solution that lightburst quoted tells us to switch Q1 and Q2. The transistor that conducts first are then on the other side of the flipflop.
Note that capacitors often have a tolerance of 20% and resistors may have as much as 10%. This means that you can be unlucky and switch the transistors and still end up with the same transistor conducting first. |
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Topic |
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Do ur peds auto-on when using an adaptor ?
