Note: The solid state relay has been removed from the new power supply board and replaced by discrete components. The color-changing motor heats up, it stops rotating while traveling, and the color-changing power board is faulty. Replace the EF119 board. E9102 power supply board inspection CZ021, 6BPB power supply board inspection CZ1, E733 power supply board inspection CZ332, E734 embroidery machine power supply board inspection CZ342. Replace the E9505 and E721 boards.

Use the handle to rotate the color-changing motor and linkage mechanism, and observe whether the needle position indicator light changes accordingly. Replace the color-changing power supply board. Check the color-changing power supply board of the computerized embroidery machine.

E9102 power board inspection CZ021, 6BPB power board inspection CZ1, E733 power board inspection CZ332, E734 power board inspection CZ342. Replace the needle position detection board. Check E9102 power board diodes D1, D2; 6BPB power board diodes D7, D8; E733 power board diodes D3, D4; E734 power board diodes D1, D2 are damaged? Replace damaged components.

Replace the color-changing power supply board. 4 heads cap embroidery machine When using the stepper motor potentiometer to change the color, if there is a color change failure, check whether the potentiometer is damaged? Replace the potentiometer. If it does not change, or some positions are displayed and some positions are not displayed, the needle position detection board is faulty.

The color can be changed in both forward and reverse directions, but the limit is exceeded after each color change.. Check whether the coector on the pin position detection board is firmly coected, and if the contact core is damaged. The color is changed clockwise, and the color is not changed counterclockwise. Check whether the plug and core of the signal cable from the main board to the power board are damaged.

Observe whether the half-tu indicator and needle position indicator on the needle position detection board of the embroidery machine are on. Check whether the plug and core of the signal cable from the main board to the power board are damaged.

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