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Pedalhead
Silver Member
USA
245 Posts |
 Posted - 05/10/2007 : 04:52:26
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| The on/off(normal/effect) light on my big old CE-1 has gone out. Is it hard to get a replacement and then install it? |
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Pedalhead
Silver Member
USA
245 Posts |
Posted - 05/13/2007 : 04:23:02
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| Has anyone ever replaced a light on a Boss pedal ever? Anyone? I am suprised I have no replies. |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 05/13/2007 : 09:23:23
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Guess the leds of the 70's weren't as robust as today's leds. I don't have a CE-1, wish I did tho. I couldn't find a pic of the bottom plate off, only a DB-5. The led is an easy fix, and chances are the led is attached to a seperate pcb, or just plugged in to the chassis and hard wired to the board. Found the specs on the orig. led if it helps.
Part Number = SLP24B
Manufacturer Name = Various
Description = Dome-Style LED Lamp
Package Style (Basic) = Flanged
Color = Red
Lens Type = Diffused
Peak Wavelength (m) = 700n
Iv Min.(cd) Luminous Intensity = 600u
V(F) Max.(V) Forward Voltage = 1.9
@I(F) (A) (Test Condition) = 5.0m
I(F) Max. (A) Forward Current = 30m
Overall Height (mm) = 4.4
Lens Diameter Nom.(mm) = 4.0
Lead Stand-off Clearance(mm) = 0.0
Package = LED-2b |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 05/13/2007 : 16:04:51
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Hi ChristoMephisto, Pedalhead & guys
Christo I think you're trying to say,
is that it's a run of the mill, standard RED 5mm LED.
I guess I would try to check it with the diode setting on a DVM (multimeter) & see if it's still working, maybe it has gone open circuit.
Other possibilities:
The wire-s connecting the LED have broken off.
The current limiting resistor has gone high in value or open circuit.
Maybe the tracks, that go to the LED on the PCB are cracked.
Bad or cold solder joints.
A quick visual inspection will confirm, or dismiss all of the above.
LED's don't fail often, unless subjected to Over Voltage - Over Current or Over heated, when soldering.
Regards Dr. Bob |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 05/13/2007 : 17:02:23
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Yeah, I was a little surprised you said a led blew, i always thought those thing (if used properly) last forever like cockroaches and twinkies. Did a google, and some have 10-100 thousand hour lifespan.
The specs say is 4mm dia. led which i though was odd.
Go with Dr.Bob's suggestion and check the neighbouring circutry. Could be something that leads to the led, but has no effect soundwise.
Do you have any pics of the inside for others to appreiciate and enjoy? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 05/14/2007 : 12:00:19
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Hi Guys
The spec's say 4mm LENS, and LED's are usually tapered, smaller & the lens & larger at the base.
Good Point Christo, a couple of pic's of the insides of the offending pedal would be great!
I might have missed something, but does the pedal still function normally, & it's just, that the LED is not working?
Regards Dr. Bob
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Pedalhead
Silver Member
USA
245 Posts |
Posted - 05/15/2007 : 00:25:39
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| Works great, just a light out. |
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Pedalhead
Silver Member
USA
245 Posts |
Posted - 05/15/2007 : 03:50:54
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Here is an image. I hope. |
Edited by - Pedalhead on 05/16/2007 06:10:21 |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 05/16/2007 : 11:29:59
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Wow look at all that access to the led held in with a mounting plate.
Is the main pcb big, or is there a lot of wasted space in the ce-1.
After you remove the plate, try a LED to see which fits. Most likely a 3.5mm will do the job. If it looks good, run with it
I've seen the 4mm leds on the net, but seemed obscure or had flat tops.
hope this helps
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libra
Copper Member
USA
2 Posts |
Posted - 09/24/2008 : 02:30:07
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Responding to the person with the LED in his/her CE1 chorus. I have the schematics for this unit ,got them because I had similar problem with mine. The number for the LED is SLP-24B made by Sanyo. I found lots of places that list the bulb but none that will sell in small quantites.. By the way the schematics can be found on the internet by googling, that's how I found them.
Was not aware of the things mentioned to check for reasons why it is not illuminating any longer. I bought mine new in the mid seventies and use it regularly everytime I plug in. Roland made some really great gear in those days. I also have the RE-201 space echo which by the way still works after I had some maintennance done to it a few years ago. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 09/24/2008 : 03:20:43
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During the last year I have replaced two (2) LEDs that have failed. One was an old LED that just died, the other was an infantile failure after about 2 hours.
It could simply be a failed LED....... (sometimes a cigar is just a cigar  )
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/24/2008 : 08:47:24
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Hi libra
Welcome to the forum from Australia.
Regards Dr. Bob |
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gnbass
Copper Member
USA
1 Posts |
Posted - 04/02/2009 : 23:30:32
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Hi Is anybody able to find me the led for my black label CE-2?
I believe the correct part is Sanyo SLP-24b.
I'd sure appreciate it.
Thanks,
Garry
gnbass@aol.com
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Mesjoggah
Gold Member
Netherlands
595 Posts |
Posted - 04/03/2009 : 07:08:16
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quote:
Originally posted by gnbass
Hi Is anybody able to find me the led for my black label CE-2?
I believe the correct part is Sanyo SLP-24b.
I'd sure appreciate it.
Thanks,
Garry
gnbass@aol.com
Any standard 3mm LED will work on your CE-2 |
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Topic |
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Boss CE-1 light replacement question?
