Brother BAS-326G Service Manual page 133

8. ELECTRICAL MECHANISM
Problem #2 When the power is turned on, nothing is displayed in the PROGRAM No. display or the menu display.
Cause
Control program does not operate.
Problem #3 When the power is turned on, an error code is displayed.
Cause
1. If [E025] or [E035] is displayed,
the foot switch is still depressed.
2. If [E055] is displayed, there is a
malfunction of the machine head
switch.
3. If [E065] is displayed, one of the
keys on the operation panel is
still depressed.
4. If [E403] is displayed, there is a
poor connection between the
main P.C. board and the PMD
P.C. board.
5. If [E401] is displayed, there is a
poor connection between the
main P.C. board and the power
supply motor P.C. board.
6. If [E450] or [E452] is displayed,
the machine head
cannot be verified.
7. If [E700] is displayed, there is an
abnormal rise in the power
supply voltage.
8. If [E705] is displayed, there is an
abnormal drop in the power
supply voltage.
9. If [E740] is displayed, there is a
malfunction of the cooling fan.
126
Inspection/Remedy/Adjustment
Insert a CF card containing the control program,
turn on the power switch and update the program
version. (Refer to "3-11. Updating the control
program".)
Inspection/Remedy/Adjustment
1) Check if the foot switch is still depressed.
2) Check if there is a harness short-circuit.
3) Check that connector P6 (FOOT) is inserted
into the main P.C. board.
1) Check that the machine head switch is OFF.
2) Check if there is a harness short-circuit.
3) Check that connector P9 (HEAD-SW) is
inserted into the main P.C. board.
Check that connector P1 (PANEL) is inserted
into the main P.C. board, and that connector
CN2 (MAIN) is inserted into the panel P.C.
board.
1) Check that connector P17 (M-MOTOR) is
inserted into the main P.C. board, and that
connector P6 (MAIN) is inserted into the
power supply motor P.C. board.
2) Check if there is a harness short-circuit.
1) Check that connector P1 (MAIN) is inserted
into the power supply motor P.C. board.
2) Check if there is a harness short-circuit.
1) Check that connector P3 (HEAD-M) is
memory inserted into the power supply motor P.C.
board.
2) Check if there is a harness short-circuit.
1) Check that the power supply voltage at the
wall outlet is within the range of the
specification voltage +/- 10%.
2) Refer to check items #1-2 and #1-3.
1) Check that the power supply voltage at the
wall outlet is within the range of the
specification voltage +/- 10%.
2) Refer to check items #1-2 and #1-3.
1) Check if there are any thread scraps blocking
the cooling fan.
2) Check that connector P22 (FAN) is inserted
into the main P.C. board.
BAS-311G, BAS-326G
Replacement if a malfunction
Main P.C. board
Replacement if a malfunction
Treadle unit
Two-pedal foot switch
Machine head switch
Panel P.C. board
Panel harness
Harness
Power supply motor
board
Main P.C. board
Main P.C. board
Machine head memory
DC fan motor assembly
P.C.