Schematic that doesn't specify components ?

[deoxit hufr]

I want to wire up a simple foot switch for a guitar ampliifer. I have found
the schematic for the amp and switch, but the schematic for the foot switch
is not labeled with any values for resistors, diodes etc.

I have a detail of the switch and also the full schematic, if someone could point me
in the right direction of finding component values. I simply don't have the education,
or insight of where to look for the answers on this.

attached are a close up of the swtich and some specs I can't decipher
and here is a link to the full schematic..

https://el34world.com/charts/Schema...der_blues_deluxe_deville_reissue_vintage_.pdf

thanks for helpful input..

 

[davenn]

is not labeled with any values for resistors, diodes etc

the resistors and capacitors values are clearly labelled
The diodes are probably basic 1N4000 series eg a 1N4004

 

[deoxit hufr]

the resistors and capacitors values are clearly labelled

Great... you can see what I can't... mind to point out where they are labeled?
I am not experienced reading schematics, or it would likely be as obvious to me as it was to you.

 

[Martaine2005]

C57 = 220 picofarad.
R99 = 47Ω.

 

[deoxit hufr]

C57 = 220 picofarad.
R99 = 47Ω.

ohh never knew about this code for the components.. 1st time to see and know
is there a key that translates all of these?

why is it C "57" meaning the 57th capacitor referenced ?

D31 D32 are these different values? for diodes I suppose ..

I wouldn't know what "key" words to use for search ...either

maybe I need a complete book suggestion to read up on this

merci, @Martaine2005

 

[Martaine2005]

A key that translates?
Into French?

Yes there is. Called reference designators or refdes for short.
R is resistor
C is capacitor
D is diode.
The numbers after the letter help find an individual component. imagine having 500 resistors on one PCB.
R1, R2, R3............R99 etc.

Martin

 

[Martaine2005]

You edited your reply.
Yes, exactly C57 = capacitor number
57.
D31 = diode number 31. Although the type is not given. As @davenn said, probably standard diodes like 1N4000 series or smaller.

A fantastic book is “The Art Of Electronics”. By Harrowitz and Hill.

Martin

 

[bertus]

Hello,

From page 6 of the given manual:



From the footnotes:




Bertus

 

[deoxit hufr]

ok... getting a better idea going along..
thanks all

 

[bertus]

Hello,

The leds in the footswitch assembly are probably red leds.
Read this blog for more info:
https://www.megadix.it/blog/diy-fender-princeton-dsp-65-footswitch/

Bertus

 

[deoxit hufr]

The leds in the footswitch assembly are probably red leds.

Yes, indeed they usually are, however some are bicolor, which you need to search down at the usual sites..
digikey, mouser etc. Fender would prefer you buy a new amp, or even a new foot switch instead, so they
don't usually make these parts available, or at the very least they would want you to pay someone "authorized"
to do the repair. Hardly worth it to supply rehab parts to the DIY crowd for a foot switch, they go for around $40 new.