Reply to "Schematic for QSI DCRU"

stan2004OGR Forum Member

From what I can tell, the only Zener diode in that area is a 1N4731A (4.3V), see red arrow. There are 2 diodes (pointed to in yellow) underneath the big axial capacitor and next to the relays but those seem to be regular diodes; from what I can tell they are placed across the relay coils and I'd guess are "just" the flyback/clamp diodes.

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