Brother LK3-B430E Mark II Service Manual page 88

10. ELECTRIC MECHANISM
Error status Probable causes
1. Conversion transformer
#1
improperly wired
(for 100V specification)
The power
lamp does
not light
when the
power is
turned on.
(For 380 V, 400V, and 415 V specifications)
(For 200 V, 220 V, and 230 V
specifications)
No conversion transformer is installed.
2. Conversion transformer
defective
3. Power supply cable defective
81
Check/repair/adjust
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.
a. Conversion in the control box
Check the transformer is correctly and
securely wired to the terminals.
(For 200 V, 220
specifications, this is not necessary.)
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.
If there is no continuity, replace the
conversion transformer.
(For 200 V, 220 V, and 230 V specifications,
this is not necessary.)
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.
If the voltage is as shown in the table below,
the power supply cable is not defective.
The same as the
For 200 V, 220 V, and
power supply voltage
230 V specifications
of wall socket
For 100 V, 110 V, 240
V, 380 V, 400 V, and
415 V specifications
After checking, turn off the power, and rejoin
P4 connectors.
LK3-B430E Mark II
Parts to be replaced
V, and 230 V
Conversion
transformer
Power supply
cable
About 220 V