Brother PE770 User Manual

5 - 5
Electronic Parts
Failure Investigation for Electronic Parts Pulse motors do not return to starting position
When the power is turned ON, the pulse motors do not return to the
starting position.
•
Regardless of needle position, the AT&C pulse motor return to starting position.
Replace the pulse motor.
Replace the main PCB assy.,
or
Replace the motor PCB assy.
Is the resistance between the 1 & 2
pins and 3 & 4 pins on the pulse
motor connector 4 – 6 Ω?
Is the voltage between pins 5 & 4 of
CN19 on the motor PCB assy. 26 V DC?
N
Replace the power supply unit.
N
Y
Replace the FFC.
Is the FFC connected correctly
between the main PCB (CN5) and
the motor PCB (CN1)? Are both
connector locks applied correctly?
Is the FFC connecting the main PCB
(CN5) to the motor PCB (CN1) free
from breakage?
N
Y
Y
N
Y
Connect it properly.

Brother PE770 Specifications

General

AC input voltage	110 V
Power supply type	Electric
Display	LCD
Interface	USB
Control type	Sensor
Sewing speed	650
Product color	Violet, White
Buttonhole type	-
Number of fonts	6
Wire cutter included	Yes
Sewing machine functions	Embroidery
Automatic needle threader	No
Number of illumination LEDs	2
Number of embroidery designs	136

Weight and Dimensions

Depth	438.9 mm
Width	540 mm
Height	425.9 mm