Brother PR-620 Specifications download pdf (Page 303)

5 - 21

Failure Investigation

for Electronic Parts

Failure Investigation for Electronic Parts

The hoop sensor does not function normally.

The hoop sensor does not function

normally.

Connect it properly.

N

Y

Is the hoop sensor tuned correctly?

Connect it properly.

N

Y

Is the FFC (SML2CD-X) properly connected

to CN1 on the hoop sensor PCB and CN2

on the X area sensor PCB? Is the

orientation of the FFC (SML2CD-X) correct?

Connect it properly.

N

Is the FFC (SML2CD-C) properly connected

to CN1 on the X area sensor PCB and CN4

on the connect PCB? Is the orientation of

the FFC (SML2CD-C) correct?

Y

Connect it properly.

N

Is the FFC (SML2CD-Y) properly connected

to CN1 on the Y area sensor PCB and CN2

on the connect PCB? Is the orientation of

the FFC (SML2CD-Y) correct?

Y

Connect it properly.

N

Is the Y area sensor's lead properly

connected to CN19 on the main

PCB?

Y

Change FFC (SML2CD-X).

N

Is the resistance between each terminal at

both ends 1Ω or below when both ends of the

FFC (SML2CD-X) are removed from the PCB?

Y

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