This machine when shooting the zoom control the "T" key, the zoom lever from the bottom to normal rotation, electronic like in the foreground objects can be found from wide Angle to telephoto zoom in succession. When press "W" key, the zoom lever to turn when stop, serious when no turning. 55Vservice manual download site
 55Vservice manual download site
Press the "T" key to zoom rod rotation is normal, press "W keys when the zoom lever stops, the preliminary judging the failure is due to electric zoom drive circuit work properly or motor rotation gear wear and tear, and the" W "key, caused by poor contact circuit as shown below. Open the machine left and right sides chassis, unload the camera above the screen cover, changing the zoom lever with the hand, observe the motor drive gear and zoom ring gear meshing transmission is normal, the zoom lever upwards to the pole, press" W "key, the zoom lever still does not rotate, the connectors with tweezers BA304 short circuit between (1), (3) feet, observe the zoom bar continuous turning down on normal. Away from the chassis on the left hand, examination revealed connectors P1507 (3) feet around the leg have crack, thus causing poor contact, makes the zoom lever to only one direction. Good to weld connector P1507 (3) feet after machine work back to normal.55Vservice manual download site