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Electronic Parts
Failure Investigation for Electronic Parts Power does not come on
When the power is turned ON, the
buzzer does not sound
Replace the inlet assy.
or
Replace the power supply code
With the power cord plugged into an outlet,
is the voltage between pins 1 & 2 on the
inlet assy. connector 120 (220 – 240) V AC?
Are the voltages between pins 2 & 3 and
pins 3 & 4 of CN5 on the main PCB assy.
normal?
• Pins 2 – 3 ... 5 V DC
• Pins 3 – 4 ... 30 V DC
N
N
Replace the SS-VR PCB assy.
Does the buzzer sound when the power
is turned ON with the SS-VR PCB assy.
connector disconnected from the main
PCB assy.?
Y
Reconnect the connector of
the PW SW assy. to CN101 of
the power supply PCB assy.
or
Replace the PW SW assy.
Reconnect the connector of the
power lead wire to CN201 of the
power supply PCB assy. and to
CN5 of the main PCB aasy.
or
Replace the power supply
PCB assy.
N
N
Replace the operation PCB
assy.
Does the buzzer sound when the power
is turned ON with the operation PCB
assy. connctor disconnected from the
main PCB assy.?
Y
N
Y
Is the voltage between pins 1 & 2 of
CN101 on the power supply PCB assy.
120 (220 – 240) V AC?
Y
Y
Replace the main PCB assy.
Summary of Contents for B-500
Page 2: ......
Page 17: ...1 8 ...
Page 19: ...2 2 Main parts Main parts location diagram Main unit ...
Page 36: ...2 19 Disassembly Thread tension mechanism Thread tension mechanism location diagram Main unit ...
Page 39: ...2 22 Bobbin winder mechanism Bobbin winder mechanism location diagram Main unit ...
Page 43: ...2 26 Feed mechanism Feed mechanism location diagram Main unit ...
Page 49: ...2 32 Base plate and handle Base plate and handle location diagram Main unit ...
Page 52: ...2 35 Disassembly Needle presser module Needle presser module breakout diagram Modules ...
Page 61: ...2 44 Feed and bobbin module Feed and bobbin module breakout diagram Modules ...
Page 71: ...2 54 ...
Page 73: ...3 2 Base plate and handle Base plate and handle location diagram Main unit ...
Page 81: ...3 10 Feed mechanism Feed mechanism location diagram Main unit ...
Page 84: ...3 13 Assembly Bobbin winder mechanism Bobbin winder mechanism location diagram Main unit ...
Page 88: ...3 17 Assembly Thread tension mechanism Thread tension mechanism location diagram Main unit ...
Page 98: ......
Page 99: ......
Page 100: ......
Page 101: ...3 30 Assembly Main parts Main parts location diagram Main unit ...
Page 113: ...3 42 Assembly Needle presser module Needle presser module breakout diagram Modules ...
Page 125: ...3 54 Assembly Feed and bobbin module Feed and bobbin module breakout diagram Modules ...
Page 138: ...3 67 ...
Page 162: ...4 24 ...
Page 187: ...6 1 6 Repair Manual ...
Page 196: ...6 10 ...
Page 211: ...09F07HF885V11 ...