Brother BAS-415 - Page 92

NO.IN FLOW CHART
CAUSE
CHECK/ADJUSTMENT/REPAIR
PARTS TO BE REF.
AND ERROR STATUS
REPLACED PAGE
#1 1. CPU version of keyboard is
Change CPU version of keyboard to proper version
CPU of keyboard P54
Keyboard
ROM NG is incorrect. matching PROM of PCB.
displayed.
#2 1. Power is not supplied.
(a)* Measure voltage of single phase power supply.
"CAUTION MOVINGI" If the voltage Is not 100V AC (120V, 220V, 240V
is not displayed. depending on where It Is used.), It Is defective.
2. Power switch or its cord
Remove face cover on the left. turn on the power with
Power supply cord
defective
power plug unconnected, then measure transformer Breaker
Input terminals of the power supply plug and power
supply unit. If there Is no continuity. the power switch
Is defective.
3. Regulator defective
(a)* With connector P3 unplugged. measure + sv Regulator P92
Output terminal of regulator. If It Is + SV,It Is
normal. Similarly. check the+ 12Vand -12V
terminals. If It Is + 12Vor-12V,It Is normal.
4. Power harness defective
(a)* While connector P3 Is plugged. check + sv. + 12V
Power supply P92
and ·12V terminals on the main circuit board. If harness A
they are + sv. + 12V and ·12V each. they are
Main circuit board
normal.
5. Keyboard cable defective
Check that there Is continuity between same numbers
Keyboard cable
P97
In double end connector of keyboard assembly. If there
Is no continuity ,It Is defective.
6. Operation panel defective
Replace operation panel.
Operation panel
P57
7. Main circuit board defective
Replace main circuit board.
Main circuit board
P47
8. Fuse F2 blown
Replace fuse. Fuse
P58
#3
1. Pulse motor harness defective
Check that connector P41s correctly connected and
Pulse motor
P92
"X_ORG.Error" or
proper continuity tested for.
harness
"Y _ORG.Error" is
2. Pulse motor power supply
(a)* With connector P2 on PMD circuit board
Power supply unit P92
displayed. defective
unplugged. check the voltage of pins No.1 ( +) and
No.5(·). If It Is not 37V,It Is defective.
3. Pulse motor defective
Replace pulse motor.
Pulse motor
4. PMD circuit board defective
Replace PMD circuit board.
PMD circuit board P48
5. Main circuit board
Replace main circuit board.
Main circuit board P47
6. Fuse F1 blown
Replace fuse. fuse
P58
#4
1. Home position sensor defective
Check that connectors P9 and P10 are correctly
Home position
P93,94
"Overtravel"
is
connected and proper continuity tested for.
sensor
displayed.
2. Over travel sensor defective
Check that connector PSis correctly connected and
Over travel sensor
P93
proper continuity tested for.
3. Main circuit board defective
Replace main circuit board.
Main circuit board
P47
-89-
From the library of: Superior Sewing Machine & Supply LLC