Pedestrian rewind button appear upside down. After stop when you press the video reproduction key, and then to enter video reproduction state; Press the power button, sometimes normal boot, or could not be started quickly; Push out the belt key sometimes normal and sometimes is not normal. PWJservice manual download site
 PWJservice manual download site
According to the practical experience, may be a key switch internal poor contact. Repeated the press of a key operation, observe carefully, according to the corresponding characters usually in the press, according to the function key moments but machine can't timely according to the function instruction. To touch, artificially operation key action to extend the time, found that push hard time slightly longer, for the most part executes instructions properly action, show that the switch does exist certain contact resistance, the sensitivity is affected, action is slow. In order to confirm the above phenomenon is the result of the switch operation, to replace the power supply first start switch. New repeatedly for many times, after the start-up returned to normal. And then testing for switch, found in conduction Ω 48 ~ 120 Ω contact resistance, as the weight, size variation, proves that the micro switch contact resistance is the root cause of the dysfunction. PWJservice manual download site
 PWJservice manual download site
 PWJservice manual download site
 PWJservice manual download site
Further examination other switch function, also has the phenomenon of poor contact. Will commonly used video reproduction, stop, fast forward, rewind, pop-up replace all button switches, and again repeatedly for these function keys, all function back to normal.PWJservice manual download site