This machine insert with box, tape automatically unloaded in a few minutes, then then rewind, and after 10 s outage protection, press "out of box" with warehouse plays out. To connect the power switch or press "out of box", immediately rewind machine, 10 s still outage protection. Remove the battery after 10 min to insert and turned on the power switch, the machine work back to normal, a few minutes and then repeat the fault phenomenon. KRFservice manual download site
 KRFservice manual download site
According to the fault analysis a after the machine is electric heating element is caused by the soft breakdown. In order to quickly determine the fault parts, take out the battery after 10 min to insert and turned on the power switch, then the pop-up box and let the machine electricity to insert in a few minutes with box, press "fast forward" to fast-forward status indicator light on the operation panel, tape with ls to immediately stop, press "rewind" is the same, then press "out of box" with box to pop up normally. From the analysis of the above test results, fault in rotating detection control circuit, the circuit shown in figure. Disassemble the machine on the right side of the chassis, press the "replay" button, the multimeter to check connector P6009 voltage is 4 V (1) foot, check P6007 voltage of 3.8 V (2) feet (normal value should be 3.3 V), explain with rotating detection device Q1503 photosensitive transistor has broken down. Replacement Q1503 / after ON2170 photosensitive transistor, machine work back to normal.KRFservice manual download site