1. Wire harness not connect well , Analysis and elimination ：
The wires from main board connect to the motors loose connection or open circuit，cause the main board DC24V can’t transfer to
the motor 。As Pic 13 and check if the CON48 Kneading motor Plugin on the main board connect Kneading motor plug wire well and
turnon . If not , just make it connect ；If connect well , need to check the main board .
2. Main board failure , Analysis and elimination：
As Pic 11 or Pic 13，Measure Kneading ，Tapping Paster field effect tube IRFS3607、Driver PMD2001D，Quick resumption tube SF56
to see if broken obvious。Find main board Driver output signal exist or not ，Exist signal means Driver and Back driver circuit fault ，
if no signal means front chip program or test-circuit fault，Fix or change main board is ok 。
Driver transfer signals during the Kneading and Tapping circuit 。As pic14 show：
Chip decide sending out Kneading signal→Signal send to audion S8050 ，
Then audion S8050 control Optocoupler get the signal or not→Driver 250’s
②③ pin get DC0.6～1.1V input signal first ，Then output DC8～3.5V’s
Signal voltage to control Paster field effect tube IRF3607connect ，
diode SF56 get the signal and output the DC24V drive power 。
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