Brother 431B Sewing Machine User Manual


 
8. ELECTRIC MECHANISM
KE-430B, 430C series
177
Erro
r status #1 The power indicator does not light when the power is turned on.
Probable causes Check/ repair/ adjust Parts to be replaced
1. Conversion transformer
improperly wired
(for 100V and 110V
specifications)
<100V>
(for 240V, 380V, 400V and
415V specifications)
<400V>
(for 200V, 220V and 230V
specifications)
No conversion transformer is
installed.
Note: Before adjustment, be sure to check
that the power is turned off to prevent
electric shock.
If the power is turned on, turn off the
power, and wait at least 5 minutes.
• Conversion in the control box
Check the transformer is correctly and
securely wired to the terminals.
(For 200V, 220V and 230V specifications,
this is not necessary.)
2. Conversion transformer
defective
• Separate P4 (ACIN) connectors on the
power supply circuit board, and check
there is continuity between pins 1 and 2 in
the connector on the cable.
(For 200V, 220V and 230V specifications,
this is not necessary.)
Conversion transformer
3. Power supply cable defective • Separate P4 (ACIN) connectors on the
power supply circuit board, turn on the
power, and measure the voltage across
pins 1 and 2 in the connector on the cable.
3630Q
3631Q
If the voltage is as shown in the table below,
the power supply cable is not defective.
After checking, turn off the power, and rejoin
P4 connectors.
Power supply cable
4. Fuse has blown • Remove fuses No.3 and No.4, and check
them for continuity.
If there is no continuity, replace the fuses
with new ones, and perform the check/
repair/ adjust items of #1-5.
Fuse 6A-250V
3632
Q
3633Q
For 200V, 220V and
230V specifications
The same as the
power supply voltage
of wall socket
For 100V, 110V,
240V, 380V, 400V
and 415V
specifications
About 220V