• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

My tr808 fix up job... but i'm confused about parts to get

Status
Not open for further replies.

rokuez

New Member
I numbered my questions 1-4

I'm looking to purchase parts for my tr 808 but I'm some what confused. I want to start by recapping, replacing diodes, replace switches for the 16 steps, and then re-calibrate it.

The problem is that I'm not 100% sure what kind of diodes to purchase. I have the service manual printed out (linked below)

http://www.matrixsynth.com/blog/media/roland/TR-808 Service Manual/TR808 service manual.pdf


in the parts list they have

Diodes

15019120 IS2473 Si Diode
15019122 IS188FM Ge Diode
15019236 W-02 Rectifier stack
15019209 10E-2

However my friend told me to use 1N4148 High Speed Switching Diode and to "replace all" ( 1N4148 High speed Switching Diode by Philips Semiconductor )

1. Should I replace all diodes with these 1N4148? or just the Silicon ones?

2. Is the 1N4148 a Silicon or Germanium Diode?




I plan on buying Panasonic FM and FC from digikey

I heard you can put slightly higher farad value caps in for the PSU

3. What is the highest/best value I can put in for the PSU caps?


I've done some searching on threads

TR 808 Parts? - Gearslutz.com

& I found this fellow
A super tech in Japan who does a kick ass overhaul on 808s

About TR-808s ;

TR-808 <---click link to see pics
-re-soldering (all ! )
-replace all Electrolytics
-BD Modify (Pitch & Decay Time)
-HandClap Mofify (Decay Time)
-Kenton MIDI Retrofit

TR-808 Part 2 <---click link to see pics
-re-soldering (all ! )
-replace all Electrolytics
-Switch replace
-Output Level Volume replace
-Sound Improvement (OPAmp replace)
-Kenton MIDI Retrofit

I'd like to do the Kenton Midi Mod, is there anything from this mans superb work you would recommend that I do to my tr808?

4. Do you guys think the re-soldering all pads i.e heating up solder points to let them reflow is really necessary?
 
Status
Not open for further replies.

EE World Online Articles

Loading
Top