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Failure Investigation for Electronic Parts The hoop sensor does not function normally.
Change FFC (SML2CD-C).
N
Is the resistance between each terminal at
both ends 1
Ω
or below when both ends of the
FFC (SML2CD-C) are removed from the PCB?
Y
Change FFC (SML2CD-Y).
N
Is the resistance between each terminal at
both ends 1
Ω
or below when both ends of the
FFC (SML2CD-Y) are removed from the PCB?
Y
N
Change X area sensor PCB.
Y
Does the machine function normally when the X
area sensor PCB is replaced with a reliable one?
Change hoop sensor and
tune it again.
N
Does the hoop sensor's lever rotate smoothly
and return to the stopper by the force of its
spring when pressed with fingers?
Y
Change hoop sensor and
tune it again.
N
Does the resistance between pins 1 and 2, and 2
and 3 of the connector vary from approximately 0
to 1.2k
Ω
, respectively, as the lever rotates, when
the hoop sensor's lead is removed from the hoop
sensor PCB? Is the resistance between pins 1
and 3 approximately 1.2k
Ω
?
Y
Change hoop sensor PCB.
Y
Does the machine function normally when the
hoop sensor PCB is replaced with a reliable one?
N
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Summary of Contents for PR-600II
Page 1: ......
Page 2: ......
Page 20: ...2 2 Main parts Main unit ...
Page 33: ...2 15 Disassembly Feed unit Main unit ...
Page 44: ...2 26 Needle thread unit Main unit ...
Page 47: ...2 29 Disassembly Needle bar change unit Main unit ...
Page 50: ...2 32 Thread wiper unit Main unit ...
Page 54: ...2 36 Needle bar unit Main unit ...
Page 60: ...2 42 Upper shaft unit Main unit ...
Page 70: ...2 52 Lower shaft unit Main unit ...
Page 73: ...2 55 Disassembly Power unit Main unit ...
Page 78: ...2 60 Thread cut unit Main unit ...
Page 82: ...2 64 Thread tension unit Main unit ...
Page 91: ...2 73 Disassembly Operation panel Main unit ...
Page 98: ...2 80 ...
Page 100: ...3 2 Operation panel Main unit ...
Page 108: ...3 10 Thread tension unit Main unit ...
Page 118: ...3 20 Thread cut unit Main unit ...
Page 122: ...3 24 Power unit Main unit ...
Page 128: ...3 30 Lower shaft unit Main unit ...
Page 132: ...3 34 Upper shaft unit Main unit ...
Page 147: ...3 49 Assembly Needle bar unit Main unit ...
Page 157: ...3 59 Assembly Thread wiper unit Main unit ...
Page 162: ...3 64 Needle bar change unit Main unit ...
Page 166: ...3 68 Needle thread unit Main unit ...
Page 170: ...3 72 Feed unit Main unit ...
Page 188: ...3 90 Main unit Main unit ...
Page 282: ...4 42 ...
Page 311: ...6 1 6Maintenance ...
Page 333: ......