Power up the machine found the character "00" display, indicating power supply properly, not plate, trays from/to control parts of the question. Common faults are: drive dislocation meshing gears, worm gears, conveyor belts, slip, a foreign body; drive motor drive circuit or exception signal disruption of the control system.

Toggle loading motor shaft gently with a hand wheel, the transmission mechanism work easily, press twice "OPEN/CLOSE (open/closed)" button, load the motor does not turn, do not reverse. 4.5V dry-cell batteries directly in the load motor M3 ends, normal motor rotation. Then press "OPEN/CLOSE"

Key, SIC3 ② ⑩ voltage measurement-driven circuit 4.6V, normal, suspect connector SOW5 poor contact, cleaned with ethanol poke the head seat, slightly plastic, inserted after a "OPEN/CLOSE" button, the tray out/in is normal.