Boss - CE-1 Chorus Ensemble  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Boss - CE-1 Chorus Ensemble  [schematic]

Postby modman » 08 Oct 2008, 22:24

Even the box by itself is absolutely stunning. Here and here are some gut shots.
more pics for free (not at $750 :shock: )

enjoy!

all pics archived
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)
User avatar
modman
a d m i n
 
Posts: 4274
Joined: 19 Jun 2007, 17:57
Has thanked: 2951 times
Have thanks: 519 times

Re: Roland - CE-1 Chorus Ensemble

Postby blanik » 13 Oct 2008, 07:09

i think i used to own this unit (the one being sold) for more than 10 years, i never used the chorus, i used it for tremolo and sold it for 250$CAN 6 years ago in Montreal... i'll have to check my old gear pics but the scratches on it seem pretty consistent with what i remember... :D
User avatar
blanik
Solder Soldier
 
Posts: 247
Joined: 04 Mar 2008, 18:10
Location: Montreal
Has thanked: 0 time
Have thanks: 8 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 14 Oct 2008, 11:57

I've got one on my table now. Unfortunately, i've just finished modding it for better performance with guitar and modern pickup signal levels, so it is no longer in "true vintage" condition. But if you need some additional photos, details i can provide them.
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby Rocket Roll » 14 Oct 2008, 13:11

That would be very educational, thanks in advance!

E.g. what about that transformer?
User avatar
Rocket Roll
Solder Soldier
 
Posts: 223
Joined: 27 Mar 2008, 09:25
Location: Belgrade
Has thanked: 10 times
Have thanks: 27 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 14 Oct 2008, 14:54

The power transformer has 2x18.5V AC secondaries (loaded), as it is written on the schematic. The overall measured differences in the voltages against the values on the schematic were about +/- 0.7V.
Here's some photos:
You do not have the required permissions to view the files attached to this post.
Last edited by pz on 14 Oct 2008, 14:57, edited 1 time in total.

For this message the author pz has received thanks:
sinner (22 Jun 2012, 15:33)
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 14 Oct 2008, 14:56

and more...
You do not have the required permissions to view the files attached to this post.

For this message the author pz has received thanks:
sinner (22 Jun 2012, 15:33)
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby borislavgajic » 15 Oct 2008, 10:44

Nice ...thanks!!!

...but trace side is missing....so could you do it please?


boris
borislavgajic
Opamp Operator
 
Posts: 1550
Joined: 27 Feb 2008, 15:23
Location: Sombor , Serbia
Has thanked: 137 times
Have thanks: 240 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 15 Oct 2008, 14:53

Tracks side, unfortunately already modded...
You do not have the required permissions to view the files attached to this post.

For this message the author pz has received thanks:
sinner (22 Jun 2012, 15:33)
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby analogguru » 15 Oct 2008, 16:31

There´s a bad solder joint (in the top-middle) of the 100k near the MN3002.

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3286
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 113 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 15 Oct 2008, 17:58

It isn't bad, it's simply no longer used.
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby analogguru » 15 Oct 2008, 19:04

aha....
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3286
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 113 times

Re: Roland - CE-1 Chorus Ensemble

Postby Fuzzer » 16 Oct 2008, 01:37

It is wired to the small board now, right?
The Freestompboxes Forum search function is soo great, use the search function..., the S E A R C H function.
User avatar
Fuzzer
Transistor Tuner
 
Posts: 1037
Joined: 16 Sep 2007, 16:17
Has thanked: 0 time
Have thanks: 18 times

Re: Roland - CE-1 Chorus Ensemble

Postby pz » 16 Oct 2008, 08:18

Yes, i've used an external trimpot to set the BBD bias voltage.
pz
Solder Soldier
 
Posts: 218
Joined: 17 Aug 2007, 17:55
Location: Germany/Poland
Has thanked: 2 times
Have thanks: 46 times

Re: Roland - CE-1 Chorus Ensemble

Postby daz » 19 Oct 2008, 15:57

i've got a copy of the schematic and board layout guide roland gave me, I'll see if I can scan it sometime..
daz
Breadboard Brother
 
Posts: 50
Joined: 12 Jul 2007, 01:13
Has thanked: 2 times
Have thanks: 7 times

Re: Roland - CE-1 Chorus Ensemble

Postby analogguru » 19 Oct 2008, 18:42

There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3286
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 113 times

BOSS - CE-1

Postby sinner » 03 Oct 2009, 12:46

I can't believe, there is no tread about this classic on the board :scratch: Perhaps my searching is wrong :roll:

Anyway, a have little thing attached to the post, but resolution of this is discussable, maybe some of you have something better?

Cheers
Pawel
sinner
Old Solderhand
 
Posts: 4811
Joined: 06 Nov 2008, 18:16
Location: ...no more
Has thanked: 1239 times
Have thanks: 1098 times

Re: BOSS CE-1

Postby JJ Gabor » 04 Oct 2009, 20:34

I am interested in a project for this one.

Here are a couple of factory schematics and images i found with google. Got no way of verifying if they are correct.

BossCE-1v1.gif

BossCE-1v2.gif

And a pic of the board
boss_ce1_05.jpg
You do not have the required permissions to view the files attached to this post.
User avatar
JJ Gabor
 
Posts: 44
Joined: 26 Jun 2008, 21:44
Has thanked: 0 time
Have thanks: 1 time

Re: BOSS CE-1

Postby pf_fan » 04 Oct 2009, 21:37

Two more from me :)
You do not have the required permissions to view the files attached to this post.
pf_fan
Breadboard Brother
 
Posts: 74
Joined: 30 Jun 2007, 15:17
Has thanked: 0 time
Have thanks: 5 times

Re: BOSS CE-1

Postby JJ Gabor » 05 Oct 2009, 00:18

Trackside!

Score :horsey:
User avatar
JJ Gabor
 
Posts: 44
Joined: 26 Jun 2008, 21:44
Has thanked: 0 time
Have thanks: 1 time

Re: BOSS CE-1

Postby borislavgajic » 05 Oct 2009, 10:49

pf_fan...this is music for my eyes!

many thanks :applause:
boris
borislavgajic
Opamp Operator
 
Posts: 1550
Joined: 27 Feb 2008, 15:23
Location: Sombor , Serbia
Has thanked: 137 times
Have thanks: 240 times

Next

Return to Modern Stompbox Effects (1975 - ...)

Who is online

Users browsing this forum: Aleksei, Google Feedfetcher and 10 guests