Brother Industries SUPER ACE+e, Руководство по обслуживанию

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8. Manual
operation of
feed and zigzag
pulse motors is
not possible.
1) Do manual keys of feed and zigzag pulse motors turn
off and on normally, and do the LCDs change?
2) Are the resistances between the pins below of the
feed and zigzag pulse motors normal?
Feed
(CN15) ... 1-3, 2-4
→
8-10
Ω
Zigzag (CN14) ... 1-3, 2-4
→
8-10
Ω
3) Others
1) Replace LCD module.
2) Replace feed pulse motor,
zigzag pulse motor or lead
wire assembly.
3) Replace main PC board
assembly.
9. Vertical
movement of
needle bar and
backstitch
operation are
abnormal.
1) Are the resistances between both sides of the SS PC
board assembly switches 1
Ω
or less and in the k
Ω
range respectively when the switches are turned on
and off?
2) Do the voltages between pins 2-1, 4-1, 5-1 and 6-1 of
the NP board assembly connector (CN13) alternate
between 0-5V when the sewing machine is turned
slowly?
3) Is the bobbin winder switch turned off?
4) Others
1) Replace SS PC board
assembly.
2) Replace NP board assembly.
3) Adjust the bobbin winder
mechanism.
4) Replace main PC board
assembly.
10.Foot controller
does not
operate
normally when
depressed.
1) Is the resistance between pins 2-3 of the pin jack
connector (CN1) 1
Ω
or less when there is no pin
jack and
∞
when there is a pin jack?
2) Does the resistance between pins 1-3 of the pin jack
connector (CN1) change from the low
Ω
range to 10
k
Ω
when there is a pin jack and the foot controller is
depressed?
3) Others
1) Replace pin jack assembly.
2) Replace foot controller or jack
assembly.
3) Replace main PC board
assembly.
11.Thread tension
is not correct.
1) Is thread route correct?
2) Are the 0 mm and 3 mm fabric thickness
adjustments correct?
3) Turn off power and lower presser foot. When turning
AT pulse motor gear manually, does it turn easily,
and together with roller?
4) Are resistances between pins 1-3 and pins 2-4 of
connector CN16 (for AT pulse motor) 8 to 10
Ω
?
5) Is the voltage between pins 2-1 of the connector
(CN12) for the fabric thickness detection under 2
VDC when the presser foot is lowered and over 3
VDC when it is raised?
6) Others
1) Check thread route.
2) Check.
3) Adjust or replace ATPM
holder complete.
4) Replace AT pulse motor or
ATPM lead wire assembly.
5) Replace thickness sensor of
fabric assembly.
6) Replace main PC board.
12.Needle bar
release
mechanism
does not
operate
correctly.
1) Does needle bar release mechanism operate
smoothly?
2) Are resistances between pins 1-3 and 2-4 of
connector CN14 (for zigzag pulse motor) 8 to 10
Ω
?
3) Others
1) Adjust needle bar release
mechanism.
2) Replace Z pulse motor or
ZPM lead wire assembly.
3) Replace main PC board
assembly.
13.Thread cutter
does not
operate
correctly.
1) Does the thread cutter move lightly?
2) Are resistances between pins 1-3 and 2-4 of
connector CN15 (for feed pulse motor) 8 to 10
Ω
?
3) Others
1) Adjust the thread cutter
mechanism.
2) Replace F pulse motor or
FPM lead wire assembly.
3) Replace main PC board
assembly.
14.Display does
not appear
clearly.
1) Is the voltage between pins 8-7 of the connector
(CN9) for LCD module -5 to -10VDC?
2) Others
1) Replace main PC board
assembly.
2) Replace LCD module or main
PC board assembly.
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