Brother NV4000D Service Manual page 361

Failure Investigation for Electronic Parts Embroidery unit does not operate normally
Is the resistance between pin 1 & pin 1 (11-way
housing), pin 2 & pin 2 (11-way housing), pin 3 & pin 3
(11-way housing), pin 4 & pin 4 (11-way housing), pin 11
& pin 1 (8-way housing), pin 12 & pin 2 (8-way housing),
pin 13 & pin 3 (8-way housing), pin 14 & pin 4 (8-way
housing), pin 15 & pin 5 (8-way housing), pin 16 & pin 6
(8-way housing), pin 17 & pin 7 (8-way housing), pin 18
& pin 8 (8-way housing), pin 19 & pin 10 (11-way
housing), and pin 20 & pin 11 (11-way housing) 1 Ω or
less? (Where the first pin in each of the combinations
above is on the main body lead wire assembly)
Is the resistance between pin 1 & pin 1 (white housing),
pin 2 & pin 2 (white housing), pin 3 & pin 3 (white
housing), pin 4 & pin 4 (white housing), pin 11 & pin 1
(black housing), pin 12 & pin 2 (black housing), pin 13 &
pin 3 (black housing), pin 14 & pin 4 (black housing), pin
15 & pin 5 (black housing), pin 16 & pin 6 (black
housing), pin 17 & pin 7 (black housing), pin 18 & pin 8
(black housing), pin 19 & pin 9 (black housing), and pin
20 & pin 10 (black housing) 1 Ω or less? (Where the first
pin in each of the combinations above is on the
embroidery unit lead wire assembly)
From previous page
Y
Y
Replace main PCB assy.
N
Replace the main body lead
wire assy.
N
Replace the EMB unit lead
wire assy.
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