[REQ] Boss CH-1A Super chorus schem

[Zero the hero]

Hi, I'm not usual to this, but I need the schematic for this effect, cause I've bought on E-bay a logic board with a couple of component missing and some wires disconnected.
It's all SMD and seems quite digital (no BBDs).
THANKS IN ADVANCE!
Alex.

[Zero the hero]

BUMP!
It seems there are no schematics out there, I just need a pic of the board... someone could open it for me?
THAAAAAAAAAAANKS!

[Steben]

You could contact BOSS/roland themselves...

[Branimir]

there is a schematic, at least i remember seening it!

i'll be home in couple of hours so i'll give it a try at finding, maybe ihave it on my hard drive too...

cheers!

[Zero the hero]

Thanks in advance!

[Branimir]

i found this thread
http://www.diystompboxes.com/sboxforum/viewtopic.php?t=31668

maybe mr. hansen has the schem, at least he had it on his site, and mentioning it, as i can see from the link few replies later, but it's 404 now..

[Zero the hero]

It seems that those mods refer to the BBD version of the pedal. I got that schem, I found it on GGG.
Unfortunately, I need the digital version of this box.
Thanks anyway!

[valvusmusicus]

HI
Just wondered if anyone had this schematic to post as I have the same problem-same pedal-just a load of logic and a strange dsp like chip-Roland UK have no record of a schematic!!
Cheers All

[Electron Tornado]

Are you referring to the CH-1(T)? It's the digital version of the CH-1 that uses the ES56028S (F5209133) chip.

[DiscoVlad]

Your google-fu is weak.

Old BBD version: http://www.eserviceinfo.com/downloadsm/41774/Boss_CH1.html
New DSP version: http://www.eserviceinfo.com/downloadsm/41775/Boss_CH1T.html

[valvusmusicus]

OH JOY UNBOUNDED-I  :icon_biggrin:CAN NOW FIX MINE!!! (possibly).!

[Phils]

Hello,
I'm a new member so I discover here. I'll probably make mistakes.
I have a broken Boss CH-1A (Made in Taiwan, digital version).
No effect at all.
Just dry signal out of the A socket when used in mono.
Just Dry signal out of the B socket and nothing on the A when used in stereo.
Knobs do nothing.
I have read the topic about the CH1 but did't found help about the digital version (exept to find the scematics).

Question: Do you think you can help me to fix it?
Am I allowed to post the schematics?
I appologize for my basic english.

Thank you