Brother KE-430B Service Manual page 192

8. ELECTRIC MECHANISM
Error status #11 The TEST indicator does not light when the TEST switch is pressed.
Probable causes
1. TEST switch and its cord are
defective.
(KE-430*, 431*, 432*, 433B,
434*, 435*, 484C, BE-438*)
Black Red
2. TEST indicator and its cord
are defective.
(KE-430*, 431*, 432*, 433B,
434*, 435*, 484C, BE-438*)
Black Red
3. Main circuit board defective
4. Panel PCB defective
(KE-436B, 436C)
Error status #12 The feed mechanism does not slowly move stitch by stitch during test sewing.
Probable causes
1. Foot switch and cord defec-
tive
2. Incorrect memory
setting
Error status #13 Quick feeding cannot be performed during test sewing.
Probable causes
1. Foot switch and cord defec-
tive
185
Check/ repair/ adjust
• Separate P8 (PANEL) connectors on the
main circuit board, and measure the
resistance between pins 2 and 20 in the
connector on the cord with the polarity
shown in the left figure.
(Use of a digital meter is prohibited.)
If the resistance is normally  , or the
needle oscillates at its maximum limits
when the TEST switch is pressed, the
TEST indicator and its cord are not
defective.
3644Q
• Measure the resistance between pins 1
and 12 with the same method as above.
If the needle oscillates at its maximum
limits, the TEST indicator and its cord are
not defective.
3645Q
• Check that P20 (RSPORT) connectors of
the main circuit board and P5 (DRV)
connectors of the panel circuit board are
plugged in.
Check/ repair/ adjust
• See #7.
switch • Set memo-08 to OFF.
(For the BE-438B and 438C, the default
setting is ON.)
• Set memo-0E to OFF.
Check/ repair/ adjust
• See #7.
KE-430B, 430C series
Parts to be replaced
Panel PCB or panel
cable assembly
Panel PCB or panel
cable assembly
Main circuit board
Panel circuit board
Parts to be replaced
Parts to be replaced