Lanzar Opti 50C

[S Merlington]

I have an older Lanzar Opti 50C that im working on..


There are 2 diodes missing from the board ZD2 and ZD3..

I believe they are for current sensing .. type of protction voltage exceeds they dump to ground loop feedback.. tells PWM to slow down..


Heres a pic of 1 of them in a working 50 C..


Anyone know a good part number for theese??

 

[ultra]

I think they belong to the pulse detection circuit and their value is 39V.

 

[S Merlington]

Thanks you have a pm

 

[S Merlington]

Anyone know the Value of this diode or have a good Part number???


It connects between pins 12 and 13 of the SG3525..

 

[Perry Babin]

1N756A possibly. It connects via a 10 ohm resistor.

 

[S Merlington]

Thanks..

Do you happen to know the part number for diodes ZD5 and ZD6

1 side connects to the positive side of the rail caps other side connects to a 100uf cap (negative side)


This amp is a total rebuild due to corrison and cannot make out the numbers

The diodes sit by the power supply fets..

 

[Perry Babin]

1N5252

Those are used in the voltage regulator circuit for the driver stage.