1. Pointer instrument

1. Structure and principle

This type of instrument includes: the cumulative mileage displayed by a 6-digit digital dial meter, the vehicle speed indicator indicator (km/h) speed, the battery voltage indicator indicator indicates the battery voltage (volt), the headlight indicator, the left and right turn signal indicator And other content.

The cumulative mileage digital meter is 6 "decimal" gear counters, and the vehicle speed indicator is a damped tachometer. They share a speed input signal for conversion and realize their respective indicating functions through mechanical transmission.

The voltage pointer meter is an ordinary 50 volt DC voltmeter head.

2. Fault detection and repair

The integration of pointer type instruments is relatively low, the wiring of the circuit is relatively simple, and the instrument circuit does not depend on the controller circuit and can work independently.

The faults of mechanical instruments are mainly lead or instrument head faults. When disassembling and assembling the instrument, it is necessary to pay special attention to the positive and negative poles of the power supply not to be mistaken. The flasher is to provide the turning bulb gap voltage so as to make the turning bulb flash. The pin of the flasher shell is marked with B for positive (Battery) and L for negative (Light), and it cannot be connected wrongly when wiring.