Shin-ei ER-23 Reverb schematic

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Shin-ei ER-23 Reverb schematic

Postby Dirk_Hendrik » 14 Jul 2007, 10:02

Have one here for service. Therefore here's the schemmo:
http://www.dirk-hendrik.com/temp/shinei_er23_reverb.jpg
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Postby analogguru » 14 Jul 2007, 10:53

Thanks for the schematic !

Is it looking the same like this ?:
Shin-ei Reverb-Mixer (RM-23)

Funny are the Shin-ei stamps on the schematic. As you can see on this poor picture:
Shin-ei Echo (RM-23) schematic
there is in the middle of the stamp "53 8." different to the "52 5." in your schematic.
I am wondering what that means and about the system of it.

On which DC-voltage the unit is running ?
I would spend it an 78xx voltage regulator.

If you can´t fix the problem I have a mod suggestion:
Remove R1, R30, C4, C8 and C16.
Place a jumper between the connection of C10/C11/R30 and the connection between C16 and the Volume pot and sell it as the "Super-Double-FuzzFace".... :lol:

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
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Postby Dirk_Hendrik » 14 Jul 2007, 13:08

analogguru wrote:Thanks for the schematic !

Is it looking the same like this ?:
Shin-ei Reverb-Mixer (RM-23)

Funny are the Shin-ei stamps on the schematic. As you can see on this poor picture:
Shin-ei Echo (RM-23) schematic
there is in the middle of the stamp "53 8." different to the "52 5." in your schematic.
I am wondering what that means and about the system of it.

On which DC-voltage the unit is running ?
I would spend it an 78xx voltage regulator.

If you can´t fix the problem I have a mod suggestion:
Remove R1, R30, C4, C8 and C16.
Place a jumper between the connection of C10/C11/R30 and the connection between C16 and the Volume pot and sell it as the "Super-Double-FuzzFace".... :lol:

analogguru


Nope. It's a different version (later) of the same device you post. The owner wanted more "wet" signal (although I have warned him straight away that wet doesn't meen a deeper reverb) as well as a change in the witing so the footswitch bypasses the effect instead of turnig off the whole device.

Never got around the shin ei coding either.... ;)
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