Brother BAS-326G Service Manual page 137

8. ELECTRICAL MECHANISM
Problem #9 When the foot switch is depressed, an error code is displayed.
Cause
3. If the work clamp moves slightly
and then [E300] is displayed,
there is a malfunction of the
encoder.
4. If the work clamp operates and
[E300] is displayed, there is a
malfunction of the work clamp
home position sensor.
5. If the work clamp does not move
and [E300] is displayed, there is
a malfunction of the pulse motor
or cord.
Problem #10 CF media indicator does not illuminate.
Cause
1. Incorrectly inserted
2. CF card incorrectly formatted.
3. Malfunction of CF card
Problem #11 Work clamp does not rise.
Cause
1. Incorrect work clamp
position adjustment
2. Incorrect mechanism adjustment
130
Inspection/Remedy/Adjustment
1) Check that connector P5 (P-ENC) is inserted
into the main P.C. board.
2) Check the encoder input while referring to
"2-8. Input checking method".
1) Check that connector P8 (SENSOR1) is
inserted into the main P.C. board.
2) Check the work clamp home position sensor
input while referring to "2-8. Input checking
method".
3) If a metallic object is brought close to the
work clamp home position sensor and the
LED inside the sensor does not illuminate,
there is a malfunction of the sensor.
4) If it illuminates, the home position dog is
incorrectly adjusted.
Switch to home position adjustment mode,
and adjust the position of the home position
dog. (Refer to "7-20. Adjusting the home
position".)
1) Disconnect connector P3 (PPM) from the
PMD P.C. board, and measure the resistance
between pins 1-2 and 3-4 at the cord-side
connector.
OK if 2-3 Ω
After measuring, insert P3.
2) If 1) is OK, there is a malfunction of the PMD
P.C. board.
4888Q
Inspection/Remedy/Adjustment
1) Check the insertion direction of the CF card.
(The side with the projection should be at the
left.)
2) Check the insertion of the CF card.
Check the format of the CF card.
(Use 16-sector formatting.)
Use a computer to check whether the contents of
the CF card can be read.
Inspection/Remedy/Adjustment
home Adjust the home position while referring to "7-20.
Adjusting the home position".
Check if the movement of the work clamp arm is
stiff.
BAS-311G, BAS-326G
Replacement if a malfunction
Pulse motor P assembly
Work clamp home position
sensor
Pulse motor P assembly
PMD P.C. board
Replacement if a malfunction
Replacement if a malfunction
Work clamp arm assembly