5 - 15
Fai
lure Investigation
fo
r El
ect
ronic
Part
s
Failure Investigation for Electronic Parts A needle is not threaded normally.
A needle is not threaded normally.
Connect it properly.
N
Y
Y
Is the needle thread sensor's lead
properly connected to CN14 on the
main PCB?
Connect it properly.
N
Y
Is the thread motor's lead properly
connected to CN6 on the main
PCB?
Change needle thread sensor PCB.
Y
Does the machine function normally when the needle
thread sensor PCB is replaced with a reliable one?
N
Change thread motor.
N
Is the resistance between pins 1 and 2,
and 3 and 4 of the thread motor 4.7 - 5.7
Ω
,
respectively, when the motor's connector
CN6 is removed from the main PCB?
Change main PCB.
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: ......