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Crash
Copper Member
USA
2 Posts |
 Posted - 06/22/2008 : 05:15:45
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Days ago I had the LED go out on my CE-2 Chorus. No problem as I have a spare; however, the LED goes on this one as well. I replace the LED in one pedal with a standard T1, check it with a battery, and re-install it on the pedalboard. The LED functions with a battery, but not with a power supply. Curious about the other pedal where the LED also went out, I put a battery in and the LED functions! However, not with an external 9v supply.
So.......
I have two (2) Boss CE-2 pedals with the exact same phenomenon occuring. LED functions perfectly with battery, not at all with 9V supply. The Chorus effect is perfect in both pedals whether on battery or power supply. The pedalboard is a Furman with hard case. I replaced the cables (power and signal), swapped with other pedals just to check LED operation and I am stumped. Can anyone please save me from insanity? Please?
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/22/2008 : 06:29:00
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quote:
Originally posted by Crash
Days ago I had the LED go out on my CE-2 Chorus. No problem as I have a spare; however, the LED goes on this one as well. I replace the LED in one pedal with a standard T1, check it with a battery, and re-install it on the pedalboard. The LED functions with a battery, but not with a power supply. Curious about the other pedal where the LED also went out, I put a battery in and the LED functions! However, not with an external 9v supply.
So.......
I have two (2) Boss CE-2 pedals with the exact same phenomenon occuring. LED functions perfectly with battery, not at all with 9V supply. The Chorus effect is perfect in both pedals whether on battery or power supply. The pedalboard is a Furman with hard case. I replaced the cables (power and signal), swapped with other pedals just to check LED operation and I am stumped. Can anyone please save me from insanity? Please?
G'day Crash!! Welcome!!
This is truly strange...........
This is the schematic:
http://www.freeinfosociety.com/electronics/schematics/audio/bossce2.pdf
Can't see anything that would cause your symptoms. EXCEPT... if the voltage on your board is too low, the zener in the LED circuit might not be "zenering" = no current - dark LED. Can you measure the voltage being supplied by your pedalboard?
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 06/22/2008 : 08:43:54
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Hi Crash
Welcome to the forum from Australia.
I was just thinking, is your MIJ CE-2 the ACA 12V type.
it needs more volts on the DC socket to get the LED to light up.
Unless you have it as the second pedal After a PSA 9V pedal.
Have you recently moved things around on your board?
Does the LED light with a battery.
Read the PSA - ACA info here on the other part of the board.
http://www.bossarea.com/other/aca.asp
Excerpt.====
Powering ACA pedals with a PSA power supply
Powering the older pedals designed for 12V DC input with either a newer ACA or PSA adapter will not work very well. The voltage drop over the resistor and diode will prevent the pedal from getting enough power and its LED will usually only glow faintly. The solution is to use a daisy chain and plug in another pedal designed for the newer ACA or PSA adapter. The lead between the two pedals will short the resistor diode pair and the pedal will receive full power.
Depending on the mains voltage there are 4 were versions of the ACA adapter. ACA-100, ACA-120, ACA-220 and ACA-240. The number denotes the mains voltage that the adpapter should be plugged into. The 9V version of the ACA adapter has a G appended at the end of its name. Pictured is the ACA-120G which is the version sold in the USA.
Thanks to Stinkfoot for most of the information above.
Thanks to Stinkfoot again... 
Regards Dr. Bob |
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Crash
Copper Member
USA
2 Posts |
Posted - 06/28/2008 : 21:45:57
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Un-freakin-believable!!?!
I have been waiting for some down time to try the suggestion/solutions.
I was wary of the daisy chain solution, as it made little sense to my limited thinker; however, it works flawlessly.
I had recently added a compressor, and changed the order or effects.
Thanks to Dr.Bob and Stinkfoot. Laurie was obviously on the right track as well and asking the right questions.
You all have a valuable resource here in this community of gurus.
Thank you all very much!
Crash <><
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Edited by - Crash on 06/28/2008 22:21:05 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 06/29/2008 : 17:53:56
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quote:
Originally posted by Crash
Un-freakin-believable!!?!
I have been waiting for some down time to try the suggestion/solutions.
I was wary of the daisy chain solution, as it made little sense to my limited thinker; however, it works flawlessly.
I had recently added a compressor, and changed the order or effects.
Thanks to Dr.Bob and Stinkfoot. Laurie was obviously on the right track as well and asking the right questions.
You all have a valuable resource here in this community of gurus.
Thank you all very much!
Crash <><
Hi Crash
That's good news.
Thanks for the update.
We are all here, to try & help each other out. (If we can)
Regards Dr. Bob
PS I hope you hang around for a bit, now that your pedal problem has been resolved. |
Edited by - Dr. Bob on 06/29/2008 17:55:06 |
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CE-2 LED issues
