8. ELECTRICAL MECHANISM

Problem

#7 When the foot switch is depressed, an error code is displayed.

 

 

 

 

 

 

 

 

 

Cause

 

Inspection/Remedy/Adjustment

Replacement if a malfunction

1.

If the X feed moves slightly and

1)

Check that connector P20 (X-ENC) is

Pulse motor X assembly

 

then [E200] is displayed, there is

 

inserted into the main P.C. board.

 

 

a malfunction of the encoder.

2)

Check the encoder input while referring to

 

 

 

 

 

“2-8. Input checking method”.

 

2. If the

X feed moves and then

1)

Check that connector P8 (SENSOR1) is

X home position sensor

 

[E200] is displayed, there is a

 

inserted into the main P.C. board.

 

 

malfunction of the X home

2)

Check the X home position sensor input

 

 

position sensor.

 

while referring to “2-8. Input checking

 

 

 

 

 

method”.

 

 

 

 

3)

If a metallic object is brought close to the X

 

 

 

 

 

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”.)

 

3.

If the feed mechanism does not

1)

Disconnect connector P10 (XPM) from the

Pulse motor assembly

 

move and [E200] is displayed,

 

PMD P.C. board, and measure the resistance

 

 

there is a malfunction of the

 

between pins 1-2 and 3-4 at the cord-side

 

 

pulse motor or cord.

 

connector.

 

 

 

 

 

OK if 23

 

 

 

 

 

After measuring, insert P10.

PMD P.C. board

 

 

 

2)

If 1) is OK, there is a malfunction of the PMD

 

 

 

 

P.C. board.

 

 

 

4885Q

 

 

 

 

 

 

 

 

 

 

Problem

#8 When the foot switch is depressed, an error code is displayed.

 

 

 

 

 

 

 

 

 

Cause

 

Inspection/Remedy/Adjustment

Replacement if a malfunction

1.

If the Y feed moves slightly and

1)

Check that connector P4 (Y-ENC) is inserted

Pulse motor Y assembly

 

then [E210] is displayed, there is

 

into the main P.C. board.

 

 

a malfunction of the encoder.

2)

Check the encoder input while referring to

 

 

 

 

 

“2-8. Input checking method”.

 

2. If the

Y feed moves and then

1)

Check that connector P8 (SENSOR1) is

Y home position sensor

 

[E210] is displayed, there is a

 

inserted into the main P.C. board.

 

 

malfunction of the Y home

2)

Check the Y home position sensor input

 

 

position sensor.

 

while referring to “2-8. Input checking

 

 

 

 

 

method”.

 

 

 

 

3)

If a metallic object is brought close to the Y

 

 

 

 

 

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”.)

 

128

BAS-311G, BAS-326G

Page 135
Image 135
Brother BAS-311G service manual 128

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