Brother International BAS-311E Network Users Manual - English - Page 116

108

BAS-311E.311EL.326E.326EL

Chapter 7

#4

The work

clamp does

not move

up and

down

when the

foot switch

is stepped

on.

#6

When the

start switch

is stepped

on, the

work clamp

does not

return to its

home

position.

#7

When the

start switch

is stepped

on, an

error code

appears.

Probable causes

7. Solenoid is defective.

8.

Control circuit board is defective.

1.

Foot switch and cord are

defective.

2.

Any cord in the control box is

defective.

1.

When the feed mechanism does

not move and error code [E.A1]

appears, fuse has blown.

2.

When the feed mechanism does

not move and error code [E.A1]

appears, the power PCB is

defective.

3.

When the feed mechanism

moves in the unusual direction

and error code [E.A1] appears,

the home position sensor is

defective.

4.

When the feed mechanism

operation is unusual, the pulse

motor is defective.

Check/repair/adjust

• Remove connector P5 (SOL) on the control circuit

board, and measure the resistance between the

following pins in the connector on the cord:

Pins 1 and 2 (presser foot): approx. 5-6

Ω.

Pins 3 and 4 (work clamp): approx. 5-6

Ω.

Pins 5 and 6 (thread trimmer): approx. 7-8

Ω.

Pins 7 and 8 (thread wiper): approx. 6-7

Ω.

• Remove connector P5 (SOL) on the control circuit

board, turn on the power, and measure the voltage

across the following pins in the connector on the

control circuit board:

Pins 1 and 2 (presser foot): 0 or +55V

Pins 3 and 4 (work clamp): 0 or +55V

• Refer to #4-1

• Refer to #4-2

• Refer to #4-3

• Refer to #4-4.

• Remove connectors P6 (YPM) and P7 (XPM) on the

control circuit board, and measure the resistance

between the following pins in the connector on the

cord:Pins 1 and 2, pins 2 and 3, pins 3 and 4, pins 4

and 5, and pins 5 and 1.

The resistance in each case should be approx. 2.0 -

2.5 W.

After measurement, return connectors P6 and P7 to

their original positions.

Parts to be replaced

Solenoid

Solenoid code

Control circuit

board.

Foot switch

Foot switch code

assembly

(Quick melting type

5A-250V)

Power PCB

Home position

sensor

Control circuit

board

Pulse motor

Pulse motor

harness

Error status

Work clamp and presser foot for solenoid specification (BAS-311E)

• Turn power off and then on again.

Move the feed

mechanism manually around the home position to

check whether the LED of the home position sensor

is lit.

(The feed mechanism can be moved manually before

the home position is detected.)

• Set the input sensor check mode to check the sensor

input.

(Refer to page 90, "7. Checking the input

sensor and DIP switch input".)

If the above step (a) is

approved, and the sensor input can not be changed,

the cord or the control circuit board is defective.

Presser foot

Work clamp

Presser foot

Work clamp

P6 (YPM) or P7 (XPM)

Section	Page
Go to Service Manual Top Page	1
Chapter 1. Mechanical description	9
1. Needle bar, thread take-up, lower shaft and shuttle hook mechanism	9
2. Work clamp lifting mechanism (1) (Solenoid type), 311E	10
3. Feed mechanism (X axis) 311E, 311EL, 326E, 326EL	12
4. Presser foot mechanism (1)	14
5. Thread trimmer mechanism	16
6. Thread nipper (1) when presser foot rises	17
7. Thread wiper (1) (vertical wiper: standard)	18
Chapter 2. Disassembly	19
1. Covers (1) 311E	19
2. Feed mechanism	21
3. Presser foot mechanism	22
4. Needle bar mechanism	23
5. Upper shaft mechanism	24
6. Feed mechanism (Y axis) (1) 311E and 311EL	25
7. Feed mechanism (X axis) (1) 311E	28
8. Lower shaft mechanism	30
9. Work clamp lifter (Solenoid type)	31
10. Thread nipper mechanism	32
11. Thread trimmer mechanism	33
Chapter 3. Assembly	34
1. Thread trimmer mechanism (1)	34
2. Thread nipper mechanism	35
3. Work clamp lifter mechanism	37
4. Feed mechanism (X axis) 311E	39
5. Feed mechanism (Y axis) 311E and 311EL	43
6. Upper shaft mechanism	47
7. Needle bar mechanism	48
8. Presser foot mechanism	49
9. Lower shaft mechanism (1)	51
10. Lower shaft (Rotary hook) (2)	52
11. Thread trimmer mechanism	53
12. Feed guide mechanism (Home position adjustment: X ) 311E, 311EL, and 326E	54
13. Covers 311E	57
Chapter 4. Adjustments	59
1. Adjusting the needle bar height adjustment	59
2. Adjusting the needle bar lift amount	59
3. Adjusting the needle clearance	60
4. Adjusting the driver needle guard	60
5. Adjusting the shuttle race thread guide	60
6. Adjusting the two-step work clamp lift amount	61
7. Adjusting the movable knife	63
8. Adjusting the lowest point of the presser foot	66
9. Changing the presser foot lift	67
10. Wiper adjustment	68
11. Adjusting the home position	69
12. Adjusting the tension of the timing belt	72
13. Adjusting backlashes	74
14. Adjusting the driving lever stopper position	75
15. Adjusting the thread trimmer driving lever position	75
16. Work clamp lift components for manual operation (Solenoid type)	76
17. Adjusting the presser foot height	76
18. Adjusting the needle up stop position	77
Chapter 5. How to make up the work clamp	78
1. How to make up clamping type work clamp	78
2. How to make up cassette type work clamp	79
Chapter 6 Power supply and electrical parts adjustment	81
1. Precautions at the time of adjustment	81
2. Components inside the control box	81
3. Fuse explanation	82
4. Connectors	83
5. DIP switches	90
6. Changing special functions using the memory switches	94
7. Checking the input sensor and DIP switch input	98
8. Checking the input voltage	99
9. Clearing all memory settings	99
10. Confirming software version	100
11. Error codes	101
Chapter 7. Trouble shooting	103
Flowchart	103
Problem solution and measures	109
Chapter 8. 1. Gauge parts list according to subclasses	120
Chapter 9. Gauge parts list	121
Chapter 10. Option parts	131

Brother International BAS-311E Network Users Manual - English - Page 116

between the following pins in the connector on the, control circuit board, and measure the resistance

Page 116 highlights