Brother BL6200 Manuale utente

4. 1998.







- 2 -



•This service manual is complied for repairing service of DOMESTIC SEWING MACHINE.

BL6200, 6700

PS1000, 1250, 1800, 1950, 2000, 2100

STAR 10, 15, 20, 20E, 30E, 40E

MYSTAR 15

•Use this manual with Parts Catalogue for fault findings when you make a repair.

•This machine is manufactured based on up-to-date product specifications at the time of this issue, but

there may be changes of specifications for improvements.

Contact manufacturer or local sales company for such changes.

Brother industries, Ltd.

Nagoya, Japan

CONTENTS

I. PRINCIPAL MECHANISMS......................................................................... 1

II. TROUBLES AND CHECK POINTS ............................................................. 11

III.HOW TO ADJUST THE ELEMENTS........................................................... 21

IV.HOW TO CHANGE THE PARTS................................................................. 58



1. Always use rubber gloves when handling a printed circuit board, and do not touch the metal portion of the

printed circuit board with bare hands.

2. Keep the human body earthed to avoid generating static electricity.

3. Pack a printed circuit board with aluminum foil and avoid impact with it while storing or transporting.

4. Do not touch or damage the metal portion of a printed circuit board with a screwdriver or anyother tool

during repairing.

- 1 -

I.

1. MECHANICAL CHART(B338, B346, B347, B348) .............................. 2

1. MECHANICAL CHART (B341, B349, B351, B352) .............................. 3

2. POWER TRANSMISSION CHART ...................................................... 4

3. DISPLAY SYSTEM BY MICRO-COMPUTER ...................................... 8

3. DISPLAY SYSTEM BY MICRO-COMPUTER ...................................... 9

4. MAIN MOTOR CONTROLLED BY MICRO-COMPUTER .................... 10

- 2 -

1. MECHANICAL CHART (B338⋅B346 ⋅B347 ⋅B348)

* This part is not installed on the B346 since it is a 4-step BH model.

- 3 -

1. MECHANICAL CHART (B341 ⋅B349 ⋅B351 ⋅B352)

* These parts are not installed on the B341, B351 and B352 since they are LCD models.

- 4 -

2. POWER TRANSMISSION CHART

(A) Generating mechanism of needle bar, thread take-up lever and zigzag movements

(B338 ⋅B346 ⋅B347 ⋅B348)

Thread take-up

lever Eccentric

counter weight Upper shaft Pulley

Needle bar

crank rod

Needle bar

clamp

Needle bar Needle bar

supporter

Needle Selecting cam

Pattern cam

Worm gear

Z finger

Zigzag connecting

rod assembly

- 5 -

(A) Generating mechanism of needle bar, thread take-up lever and zigzag movements

(B341 ⋅B349 ⋅B351 ⋅B352)

Thread take-

up lever Eccentric

counter weight Worm gear Pulley

Needle bar

crank rod

Needle ba

clamp

Needle bar Needle bar

supporter

Needle

Pattern cam

Zigzag connecting

rod assembly Z finger Selecting cam

Upper shaft

- 6 -

(B) Mechanism of feed dog and oscillating hook movement

* These parts are not installed on the B338, B346, B347 and B348.

Lower shaft

gear

Outer

rotary hook

assembly

Feed dog

Feed bar

Vertical feed

cam

Drop lever

Horizontal

feed plate

* Rotary shatter

Feed pattern

cam

Feed finger

Feed regulator

Horizontal

feed shaft

Horizontal feed cam

Forked

connecting rod

Horizontal

feed arm

Lower shaft

Timing belt

Timing pulley D

Worm gear Pulley

Motor belt

Motor

- 7 -

BH change

shaft BH change

arm BH stopper BH cam BHF finger

assembly

BH Iever

BH foot

Feed control

cam (BH) BHF finger

assembly

2-(A)

2-(B)

- 8 -

3. DISPLAY SYSTEM BY MICRO-COMPUTER (B341 ⋅B351)

An 8 bit micro-computer in models installed with an LCD (liquid crystal display) regulates the LCD controller

driver which controls the information shown on the display.

<1 LINE DISPLAY SYSTEM BLOCK CHART>

Power supply

circuit and

motor control

circuit

LCD panel

LCD controller

driver

(SED1278)

8-bit MCU

(M38004M8)

Contrast

volume

Message key

Pattern

sensor BH Iever

SW Bobbin winder

Motor control

P.C. board

LCD unit

Questo manuale è adatto per i seguenti modelli

Indice

Altri manuali Brother Macchina da cucire

Brother

Brother PR-620 Manuale utente

Brother

Brother DB2-B793 Manuale utente

Brother

Brother PC-7500 Manuale utente

Brother

Brother RH-981A Manuale utente

Brother

Brother PR-600 Manuale utente

Brother

Brother LK3-B433 700-800 Manuale utente

Brother

Brother SKiTCH 888-R00 Manuale utente

Brother

Brother CS7000X Manuale utente

Brother

Brother 888X64 Series Manuale utente

Brother

Brother XR37NT Manuale utente

Brother

Brother KE-430FX Istruzioni per il montaggio

Brother

Brother CB3-B917A Manuale utente

Brother

Brother BE-1201B AC-PC Manuale utente

Brother

Brother KE-430F Series Manuale utente

Brother

Brother 885-V51 Manuale utente

Brother

Brother CE-5000PRW Manuale utente

Brother

Brother BAS-401 Manuale utente

Brother

Brother PRCF5 Manuale utente

Brother

Brother DA-927A Manuale utente

Brother

Brother 888-V58 Manuale utente

Brother

Brother Innov-is 4000D Manuale utente

Brother

Brother 888-X39 Manuale utente

Brother

Brother ZE-8570 Manuale utente

Brother

Brother 882-W80 Manuale utente

Manuali Macchina da cucire popolari di altre marche

Riccar

Riccar RL634DE Manuale utente

Singer

Singer 2517 Manuale utente

Pfaff

Pfaff 3307-1 SERIES Manuale utente

Janome

Janome Quilt Maker Pro 18 VERSA Manuale utente

Siruba

Siruba C007JP Manuale utente

Husqvarna Viking

Husqvarna Viking Designer SE Manuale utente

Singer

Singer 148-5 Manuale utente

IKEA

IKEA SY Manuale utente

Pfaff

Pfaff 571 Manuale utente

Singer

Singer 15-91 Manuale utente

Pegasus

Pegasus WT100 Series Manuale utente

Reliable

Reliable 7100DB Manuale utente

Pfaff

Pfaff 937 Manuale utente

Singer

Singer 6038 Manuale utente

Singer

Singer 413K Manuale utente

Pfaff

Pfaff 1471 E1 Manuale utente

Kenmore

Kenmore 16677 - Serger Sewing Machine Manuale utente

HIGHLEAD

HIGHLEAD GC2008-M Manuale utente