Failure Investigation For Electronic Parts - Brother PR655 Service Manual

5
Failure Investigation
for Electronic Parts
* Perform resistance measurements after turning off the power and detaching the
connectors to be measured from the PCB.
Error message list.............................5 - 2
The power is not turned on...............5 - 3
The touch panel does not work. .......5 - 6
The panel switch does not work. ......5 - 7
The needle bar does not move normally. ...5 - 8
Thread breakage detection does not function normally. ...5 - 9
The hoop does not move normally. ..5 - 10
The main shaft does not rotate normally. ..5 - 12
Thread is not cut normally. .............5 - 14
The wiper does not function normally...5 - 15
A needle is not threaded normally....5 - 16
The picker does not function normally. ..5 - 17
LED light does not turn ON.............5 - 18
USB function and USB media cannot be used normally....5 - 19
The hoop sensor does not function normally.....5 - 20
Sound does not work......................5 - 23
LED pointer does not light ..............5 - 24
Cannot upgrade software ...............5 - 25
Error message ................................5 - 27
Replacement of main PCB assy or panel PCB assy...5 - 32
Correspondence table of "Model" and "Printed-circuit board" ...5 - 33
5 - 1