No Control Voltage Detected

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The battery charger is not detecting the necessary internal control voltage. This voltage is essential for the operation of the internal control logic, microcontrollers, and other low-power circuits within the device, preventing any operational functionality.

• Failure of an internal power supply circuit responsible for generating the control voltage.
• A blown fuse or tripped circuit breaker in the control voltage supply path.
• A disconnection within the internal wiring or power distribution related to the control voltage supply.

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1. 1

   Measure the control voltage at specified test points or terminals on the charger's control board (if documented) to confirm its presence and level.

2. 2

   Inspect all relevant fuses and miniature circuit breakers associated with the internal control voltage supply circuits.

3. 3

   Verify internal wiring connections related to the control voltage supply for proper continuity and secure contact.