V-GUARD JAADOO 1050 OLD REFURBISHED TESTED PCB

Main uses / functions of the PCB

1. Battery Charging Control

   • Regulates charging current and voltage

   • Prevents overcharging and deep discharge

   • Supports tubular/flat battery charging profiles

2. DC to AC Conversion Control

   • Manages conversion of 12V DC (battery) to 230V AC

   • Controls MOSFETs/transformer switching

   • Ensures stable output for home appliances

3. Protection Functions

   • Overload protection

   • Short-circuit protection

   • Low battery cut-off

   • High battery voltage protection

   • Thermal (over-temperature) protection

4. Automatic Changeover

   • Switches between mains supply and inverter mode

   • Seamless power transfer during power cuts

5. Status Indication

   • Controls LED indicators for:

     • Charging

     • Power ON

     • Low battery

     • Overload / fault

6. Efficiency & Safety Control

   • Maintains inverter efficiency

   • Protects internal components and connected appliances

Key components on the PCB

• Microcontroller (logic & timing control)

• MOSFET driver circuits

• Voltage & current sensing circuits

• Relays

• Capacitors & resistors

• Protection ICs

Why the PCB is important

If the PCB fails:

• Inverter may not turn ON

• Battery may not charge properly

• Overload or safety protection may stop working