Brother KE-430HX Service Manual page 213

Error status #7 Error code appears on the display when the foot switch is depressed.
Probable causes
1. If the X feed does not move and
"E200" is displayed, there is a
malfunction of the power PCB.
2. If the X feed does not move and
"E200" is displayed, there is a
malfunction of the main PCB.
3. If the X feed moves slightly and
"E200" is displayed, there is a
malfunction of the encoder.
4. If the X feed does not move and
"E200" is displayed, there is a
malfunction of the pulse motor and
cord.
Check/ repair/ adjust
Disconnect connector P2 (POWER) from the
power supply motor PCB, and then turn on the
power switch and check LD1 (red) 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
P2 (POWER) into the power supply motor PCB.
a. With LD1 (red) on the main PCB not lit,
disconnect connector P22 (POWER) from the
main PCB, and check the continuity between
terminals 1-3 of P22.
OK if  ohms.
b. Disconnect the relay connector (translucent
and connected to XT12/XT10/XT11/XT8) for
connecting the pulse motor to the main PCB,
and check the continuity between terminals
2-3 and 5-6 of the connector.
OK if  ohms.
c. Insert P22 and the translucent relay connector
for connecting the pulse motor connection to
the main PCB, turn on the power switch and
then check LD1 (red) on the power supply
motor PCB.
OK if illuminated.
If LD1 is illuminated during the check in step 1
in #7 but it does not illuminate when the
translucent relay connector for connecting the
pulse motor and P22 are connected, there is a
malfunction of the main PCB.
d. Check LD1 (red) on the main PCB.
OK if illuminated.
4178B
4179B
a. Check that connector P2 (X-ENC) is inserted
into the main PCB and that the color matches.
b. Check the encoder input while referring to
"4-4. Checking input".
a. Disconnect the relay connector (translucent
and connected to XT12/XT10/XT11/XT8) for
connecting the pulse motor to the main PCB,
and measure
terminals 2-3 and 5-6 of the cord connector.
OK if 1.89-2.3 ohms (2.1 ohms +/- 10%).
b. If step a. (above) is OK, there is a malfunction
of the main PCB.
4180B
KE-430HX/KE-430HS, BE-438HX/BE-438HS
the resistance between
14. ELECTRIC MECHANISM
Parts to be replaced
Power supply motor PCB
assembly
Main PCB assembly
Pulse motor X assembly
Main PCB assembly
Pulse motor X assembly
Main PCB assembly
202