Brother KE-430HX Service Manual page 210

14. ELECTRIC MECHANISM
Error status #3 Error code appears on the display when the power is turned on.
Probable causes
1. If "E025" or "E035" is displayed,
the foot switch is still depressed.
2. If "E055" is displayed, there is a
malfunction of the machine head
switch.
3. If "E065" is displayed, one of the
keys on the operation panel is still
depressed.
4. If "E131" is displayed, there is a
poor connection
synchronizer.
5. If "E400" or "E401" is displayed,
there is a connection
between the main PCB and the
power supply motor
between the main PCB and the
panel main PCB.
6. If "E450" or "E452" is displayed,
the machine head memory cannot
be recognized.
7. If "E700" is displayed, the power
supply voltage is abnormally high.
8. If "E705" is displayed, the power
supply voltage is abnormally low.
199
a. Check if the foot switch is still depressed.
b. Check if there is a short-circuit in the harness.
c. Check if connector P8 (PEDAL) is connected
to the main PCB.
d. Reset the depression stroke for the foot switch
while referring to "9-22. Setting method for
standard depression strokes (Foot switch)".
* For a 2-pedal foot switch, the connector for
the main PCB will be P10 (FOOT).
a. Check if the machine head switch is off.
b. Check if there is a broken wire in the harness.
c. Check
connected to the main PCB.
a. Check that there is no incorrect sensitivity
when the surface of the panel sheet and the
keys are pressed.
b. Check
connected to the main PCB, and that
connector P1 is connected to the panel main
PCB.
c. Check that CN2 is inserted into the panel main
PCB.
Check that connector P5 (ENC-MT) is connected
of the to the power supply motor PCB, and that
connector P23 (MOTOR) is connected to the
main PCB.
a. Check LD3 (green) on the main PCB.
fault OK if illuminated.
b. Check LD3 (green) on the power supply motor
PCB or PCB.
OK if illuminated.
c. Check that connector P23 (MOTOR) is
connected to the main PCB, and that
connector P4 (MN-MT) is connected to the
power supply motor PCB.
d. Check
connected to the main PCB, and that
connector P1 is connected to the panel main
PCB.
e. Check if there is a broken wire in the harness.
a. Check if connector P4 (HEAD-MEM) is
connected to the main PCB.
b. Check if there is a broken wire in the harness.
a. Check that the power supply voltage at the
mains is at the specification voltage +/-10%.
b. See #1-2.
a. Check that the power supply voltage at the
mains is at the specification voltage +/- 10%.
b. See #1-2.
KE-430HX/KE-430HS, BE-438HX/BE-438HS
Check/ repair/ adjust
if connector P9 (HEAD-SW)
that connector P5 (PANEL)
that connector P5 (PANEL)
Parts to be replaced
Treadle unit
2-pedal foot switch assembly
Switch assembly machine
head
is
Operation panel assembly
is
Main PCB assembly
Power supply motor PCB
assembly
Operation panel assembly
is