2M Technology 2MTHWT-HMD Manuale d'uso - Pagina 16

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Walkthrough Metal Detector with Single Wrist Thermal Sensor 2MTHWT-HMD

2. If the alarm failure still exists though the oscillation signal is normal, the DC power values of the motherboard shall be

checked for being +8V, -8V and +12V respectively with a multimeter.

3. If the DC power values of the motherboard are +8V, -8V and +12V, the reference voltage shall be checked for being

3.6V with a multimeter.

4. If the reference voltage is 3.6V, the 3rd-pin DC voltage of Q21 and Q25 of the motherboard shall be checked for being

close to -8V and OV respectively with a multimeter.

V. Wiring diagram of circuit board:

Mother Board + Switch power supply + Zone LED PCB + Keyboard PCB + Speaker

STANDARD COMPLIANCE

This product meets the Technical Code for GB15210-2003 Walk-through Metal Detector (WTMD).