5 - 12
Failure Investigation for Electronic Parts Cannot sew button holes well
Cannot sew button holes well
When the BH lever is lowered, is
the resistance between pins 1 & 2
and 2 & 3 on the BH switch
connector (CN21) normal?
BH lever pulled forward
Pins 1 - 2 : 1
Ω
or less, pins 2 - 3 :
∞
BH lever pushed back
Pins 1 - 2 :
∞
, pins 2 - 3 : 1
Ω
or less
Is the resistance between pins 4 and 5 on
the BH switch connector (CN21) normal?
BH lever down : 1
Ω
or less
BH lever up :
∞
Change to correct presser
N
Replace main PCB assy.
Y
Y
Is the correct presser being used?
N
N
Y
Adjust BH lever
or
Replace BH switch assy.
Adjust BH lever
or
Replace BH switch assy.
Содержание Innov-is NV4000D
Страница 1: ......
Страница 2: ......
Страница 19: ...1 5 Outline of Mechanism Outline of Mechanism Control system block diagram ...
Страница 24: ...2 2 Main parts location diagram Main unit ...
Страница 40: ...2 18 Power unit motor unit location diagram Main unit ...
Страница 46: ...2 24 Thread tension unit location diagram Main unit ...
Страница 57: ...2 35 Disassembly Bobbin winder location diagram Main unit ...
Страница 66: ...2 44 Needle presser unit needle threader unit upper shaft unit location diagram Main unit ...
Страница 71: ...2 49 Disassembly Needle presser module location diagram Modules ...
Страница 89: ...2 67 Disassembly Needle thread module location diagram Modules ...
Страница 95: ...2 73 Disassembly Feed rotary hook module location diagram Modules ...
Страница 109: ...2 87 Disassembly Side feed module location diagram Modules ...
Страница 112: ...2 90 Thread cutter module location diagram Modules ...
Страница 117: ...2 95 Disassembly Main parts location diagram Embroidery ...
Страница 134: ...3 2 Needle presser unit needle threader unit upper shaft unit location diagram Main unit ...
Страница 140: ...3 8 Rotary hook driving unit feed rotary hook unit thread cutter unit side feed unit location diagram Main unit ...
Страница 146: ...3 14 Bobbin winder unit location diagram Main unit ...
Страница 154: ...3 22 Thread tension unit location diagram Main unit ...
Страница 169: ...3 37 Assembly Power unit motor unit location diagram Main unit ...
Страница 175: ...3 43 Assembly Main parts location diagram Main unit ...
Страница 191: ...3 59 Assembly Thread cutter module location diagram Module ...
Страница 198: ...3 66 Side feed module location diagram Module ...
Страница 202: ...3 70 Feed rotary hook module location diagram Module ...
Страница 227: ...3 95 Assembly Needle thread module location diagram Module ...
Страница 236: ...3 104 Needle presser module location diagram Module ...
Страница 266: ...3 134 Main parts location diagram Embroidery ...
Страница 369: ...6 1 6Special Instructions of Wiring ...
Страница 372: ...5 Upper shaft cover 6 Lead wire guide of PCB holder 1 2 3 6 4 ...
Страница 375: ...3 Right side of main PCB Make sure connectors are connected properly 6 7 Special Instructions of Wiring ...
Страница 377: ...6 Left side of main PCB Make sure connectors are connected properly 6 9 Special Instructions of Wiring ...
Страница 378: ...1 Front cover 2 Front cover Tie with a band 6 10 ...
Страница 379: ...3 Inverter cover Enlarged picture 6 11 Special Instructions of Wiring ...
Страница 381: ......