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you will learn how does homage ups reads utility line input voltage
what is the process of ups shifting from backup mode to line mode
homage ups input voltage sense explanation | ups repair tutorial part 4 :    • ups repair part 4 | ups input voltage...  

complete homage ups Schematic(circuit diagram)
https://www.electronicabc.com/schemat...

part 3 :ups not turning on solution (battery sense explanation) in urdu hindi | ups repair tutorial part 3
   • ups repair part 3 | ups not turning o...  
Part 2: homage ups power supply uc3845 circuit diagram explained in urdu(2/2)
   • ups repair part 2 | homage ups power ...  
ups tutorial part 1 is here :   • ups repair tutorial part 1 | how does...  
this is part 3 of ups repair tutorial
in this ups tutorial you will learn how does ups checks battery voltage status ?
and you will see how to fix if ups is not turning ON
LM358 Pin out Details
LM358 Voltage on pins
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