According to the in and out of the CangJian, the screen can show the OPEN character, this machine control circuit in and out of the storehouse. To analyze problems may be in the paper are as follows: (1) load motor bad; (2) the driver circuit. Open the machine cover, first with a multimeter measure voltage at the ends of the motor. According to the in and out of CangJian measurable to normal driving voltage, motor has been bad. Removed from the circuit board, the motor pry open motor back cover, remove the rotor, found that brush have burn out, wear rotor commutator is very rough. Because there is no new change, consider the motor repair. xzeservice manual download site
 xzeservice manual download site
The first step is to put the motor commutator polishing smooth, consider making a simple grinding machine. Because there is a need not just the old four of the record player, the player of the motor down to and fixed on a board, and then find a LCMX phi 30 cm wide soft cloth without interface type O cloth belt and two pulley, one large and one small simple grinding machine is made as shown in figure l. Before grinding on the belt surface coated with toothpaste, plugged in, the motor at high speed, hand machine load motor rotor disc, press commutator on the cloth belt constantly rotating slowly, until the commutator polishing smooth as a mirror. Then burn out the brush of minor repairs as shown in figure 2. Method is: put the burn out of the brush, the brush cut two-thirds of place, to find another piece and thick copper brush, cut into 1.5 cm, width, with brush on the brush, opened at cut 0.5 cm (the total length of purpose is lengthened brush), with a soldering iron welding (note to brush welding straight). Packed according to the sample motor, finally can practice on computer test, troubleshooting.xzeservice manual download site