Oexamine protection switch on the cartridges, the REC is in the normal position (video). Truly the helpless, had to go home to search the Internet, check Baidu unexpectedly jump out of hundreds of Samsung DV camera tape protection and fault record, many sites are considered with warehouse cable broken or tape protection switch open circuit caused by. After I open the machine with storage power, with million with sheet resistance gear test tape protection switch, the switch resistance change normal, measuring tape protection switch and take positions on other contacts break have different resistance value that the fault should not by the band positions cable broken or tape protection switch open circuit caused, maintenance for a time get into trouble.
After a careful thought, the machine must detect the tape protection state, must apply a detection voltage, so the voltage between the tape guard switch at the live state and the tape protective switch to the belt metal frame. Are zero, the fault detection voltage supply circuit, if you try to give it normal detection voltage, fault can not be ruled out?
And measurement with warehouse can see contact with metal warehouse shelf between voltage and find numbered were above normal 3V voltage, the protective tape switch below the most likely connected.
On the metal frame with the transparent tape, welded on the short wire. The new band, began to test machine, the machine is no longer an alarm, fast forward, rewind, all normal camera,