Brother 484C User Manual
8. ELECTRIC MECHANISM
Error status #20 The machine does not stop with the needle at the upper position.
(“E-50” appears <“E.22” for the KE-436B and 436C>.)
Probable causes
Check/ repair/ adjust
Parts to be replaced
3. Cord defective
• See #15-1.
4. Power supply circuit board
defective
KE-430B, 430C series
189
• With P13 (DC18) connectors plugged in
on the main circuit board, measure the
voltage in the connector on the cable.
voltage in the connector on the cable.
If the voltage across the following pairs of
pins, pins 1 and 2, pins 4 and 5, and pins
10 and 11 is DC 15–18 V, it is OK.
10 and 11 is DC 15–18 V, it is OK.
Power supply circuit
board
board
5. Main circuit board defective
Main circuit board
+15 – 18V for each
Main circuit board
3651Q
6. Motor defective
Motor
Error status #21 Programming can not be made. (KE-436B, 436C only)
Probable causes
Check/ repair/ adjust
Parts to be replaced
1. The programmer connector
and its cable are defective.
• Remove connector P2 (PGM) on the
panel PCB and connector P2 on the
programmer PCB, and then return them to
their positions.
programmer PCB, and then return them to
their positions.
2. The programmer is defective.
• Replace the programmer with a new one.
Programmer
3. Panel circuit board defective
• Replace the panel circuit board with a new
one.
Panel circuit board