Brother KE-430HX Service Manual page 216

Electronic direct drive lockstitch bar tacker electronic direct drive lockstitch button sewer
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14. ELECTRIC MECHANISM
Error status #10 Error code appears on the display when the foot switch is depressed.
Probable causes
1. If "E690" is displayed during home
position
detection,
malfunction of the thread nipper.
2. If "E690" is displayed during home
position
detection,
nipper home position adjustment is
incorrect.
3. If the thread trimmer pulse motor
does not operate and "E690" is
displayed, there is a malfunction of
the power supply motor PCB.
4. If the thread trimmer pulse motor
does not move and "E690" is
displayed, there is a malfunction of
the main PCB.
5. If the thread trimmer pulse motor
moves
slightly
and
displayed, there is a malfunction of
the encoder.
205
a. Check the position of the thread nipper driving
there
is
a
lever.
b. Remove any thread scraps from behind the
needle plate.
Adjust the home position while referring to "9-21.
the
thread
Adjusting the thread nipper motor position".
Disconnect connector P4 (MN-MT) from the
power supply motor PCB, and then turn on the
power switch and check LD8 (green) on the
power supply motor PCB.
OK if illuminated.
After checking, turn off the power switch, wait for
five minutes or more, and then insert connector
P4 (MN-MT) into the power supply motor PCB.
a. Disconnect connector P23 (MOTOR) from the
main PCB, and check the continuity between
terminals 1-3 of P23.
OK if  ohms.
b. Disconnect connector P24 (TPM) from the
main PCB, and check the continuity between
terminals 1-2 and 3-4 of P24.
OK if  ohms.
c. Insert P23 and P24 into the main PCB, turn on
the power switch and then check LD5 (green)
on the main PCB.
OK if illuminated.
4295B
4185B
a. Check that connector P7 (T-ENC) is inserted
"E690"
is
into the main PCB and that the color matches.
b. Check the encoder input while referring to
"4-4. Checking input ".
KE-430HX/KE-430HS, BE-438HX/BE-438HS
Check/ repair/ adjust
Parts to be replaced
Power supply motor PCB
assembly
Main PCB assembly
Pulse motor T assembly
Main PCB assembly
(Continued on next page.)

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