rcustoms wrote:zamguitar wrote:
is 100% ok or there something so so in the final schematics
zamguitar wrote:Manfred wrote:D3,D4 looks like D1,D2,D5,D6 to me.
Did you measure the Diodes?
Just drew from the pictures, D3 and D4 are indeed 500mW zener diodes with the 1n5XX code.
Manfred wrote:Why does the edit function sometimes not work?
I meant the pointed out position.
A simple way to check what the zener is without removing it.
POWER OFF the unit
Get a 9V battery, connect battery negative to the anode of the zener, connect the cathode of the zener to the 9V battery positive THROUGH A 1k RESISTOR.
Using a multimeter, measure the voltage across the zener
I would guess these are 3.3V zeners, or maybe even as low as 2.4V