Brother BAS-342G Service Manual page 135

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] is displayed, the start
switch is still depressed.
If [E035] is displayed, the work
clamp switch is still depressed.
2. If [E055] is displayed, there is a
malfunction of the safety switch.
3. If [E065] is displayed, one of the
keys on the operation panel is still
depressed.
4. If [E403] is displayed,
connection to the PMD P.C. board
is defective.
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 memory 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 for
control box.
10.If [E741] is displayed, there is a
malfunction of the cooling fan for
the X motor.
If [E742] is displayed, there is a
malfunction of the cooling fan for
the Y motor.
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 start switch or the work clamp
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 safety 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.
the
1） Check that connector P1 (MAIN) is inserted
into the PMD P.C. board.
2） Check if there is a harness short-circuit.
1） Check that connector P6 (MAIN) is inserted
into the power supply motor P.C. board, and
that connector P17 (M-MOTOR) is inserted
into the main P.C. board.
2） Check if there is a harness short-circuit.
1） Check that connector P3 (HEAD-M) is
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.
1） Check if there are any thread scraps blocking
the cooling fan.
2） Check that connector P10 (SENSOR2) is
inserted into the main P.C. board.
BAS-342G
8. ELECTRICAL MECHANISM
Replacement if a
malfunction
Main P.C. board
Replacement if a
malfunction
Two-pedal foot switch
Safety switch
Panel P.C. board
Panel harness
Harness
Power supply motor P.C.
board
Main P.C. board
Main P.C. board
Machine head memory
Cooling fan
(for control box)
Cooling fan
(for X motor or Y motor)
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