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My original PSU doesn't work... What's wrong??
Old 13th November 2019
  #1
Here for the gear
 
My original PSU doesn't work... What's wrong??

Dear, All

Recently, I got vintage QuadEight Equalizer(EQ-444) without PSU.
So I made original PSU.(+-15V,+-28V)
But it didn't output correct voltage...

I think step-down transfer's capacity was not enough.
(I used 100V to 24Vx2, 200mA)
But it maybe another problem.
Take a look at this schematic for now.
Attached Thumbnails
My original PSU doesn't work... What's wrong??-4linepsu.jpg  
Attached Files
File Type: pdf 4LinePSU.pdf (50.4 KB, 33 views)
Old 16th November 2019
  #2
Here for the gear
 
any one?
Old 15th September 2020
  #3
Gear Addict
 
YashN's Avatar
 
🎧 5 years
Check the rectifier area carefully. There are two nodes that aren't connected at all to the rest of the circuit.

There may be more issues, haven't checked.
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