PARTS REFERENCE LIST

MODEL: HL-1850/1870N

Brother Laser Printer

Read this list thoroughly before maintenance work. Keep this list in a convenient place for quick and easy reference at all times. January 2002 PL-PRN031
NOTE FOR USING THIS PARTS REFERENCE LIST
1. In the case of ordering parts, it needs mentioning the following items: (1) Code (2) Q'ty (3) Description (4) Symbol ( PCB No., Revision , and Parts location mounted on the PCB.) Note : No orders without Parts Code or Tool No. can be accepted. < Example > (1) REF.NO. CODE (2) QTY (3) DESCRIPTION (4) SYMBOL REMARK
Revision No.: marked on the main printed circuit board.

B48K056 - 201A

Design change indication Specification No. Pattern alteration No. Circuit board No. Revision No.: marked on the power supply printed circuit board.

Rev. A

Design change indication
(The first version has no sign.)
2. Design-changed parts : If the parts are changed, any one of the following symbols is indicated in the REMARKS column. #A : Compatible between old and new #B : Replaceable from old to new #D : Incompatible # : Newly established 3. The original of this list was made based on the information available in January 2001. 4. Parts are subject to change in design without prior notice.

CONTENTS

1. 2. 3. 4. 5. 6. 7. 8. 9.
FRAME / DRIVE UNIT... 1 LASER UNIT... 1 PAPER FEEDER / MP UNIT... 3 DUPLEX.... 5 PAPER CASSETTE.... 7 FIXING UNIT.... 9 COVERS... 11 MAIN PCB... 13 ENGINE PCB... 15
10. LOW-VOLTAGE POWER SUPPLY PCB.. 15 11. HIGH-VOLTAGE POWER SUPPLY PCB.. 17 12. AC CORDS.... 17 13. ACCESSORIES.... 19 14. PACKING MATERIALS... 21 15. NETWORK BOARD... 21 16. PERIODICAL MAINTENANCE PARTS.. 23
1. FRAME / DRIVE UNIT REF.NO. CODE Q'TY 1 LJ2 LJ3 LJ4 LJ5 LJ6 LJ7 LJ8 LJ9 LJ10 LJ11 UL12 LJ13 UL14 LJ15 LJ16 LJ17 LJ18 LE23 LJ24 LJ25 LJ26 LJT/I NO. PR2002076
DESCRIPTION MAIN MOTOR ASSY HE FEED SOLENOID ASSY HE SOLENOID ASSY 04C4 SOLENOID ASSY 04C5 LOCK LEVER SPRING TONER LED PCB UNIT (EMISSION) SOL RELAY PCB ASSY REVERSING SWITCH SOLENOID T-BELT B40S2M142
TONER SENSOR PCB UNIT (RECEPTION)

SYMBOL

PR2002076 REMARK
RUBBER FOOT GEAR 21H CONDUCTOR BUSH 5 CONDUCTOR BUSH H FAN MOTOR 60 DX SENSOR PCB ASSY TAPE 60X12 USB GROUND PLATE SCREW, CUP S TITE 3X6 TAPTITE, BIND B M4X10 SCREW, BIND M3X4 TAPTITE, BIND B M3X8 FUSER DRIVE GEAR 1HE FUSER DRIVE GEAR 2HE FEED ROLLER GEAR SHAFT SPRING, EXTENSION P/R
MODEL HL-1850/1870N 84U-Z23/Z24-010
2. LASER UNIT REF.NO. CODE Q'TY DESCRIPTION 1 LJLASER UNIT (SP) 3 TAPTITE, CUP S M3X16

REMARK

MODEL HL-1850/1870N 84U-Z23/Z24-020
1. FRAME / DRIVE UNIT 20 7

PR2002076

T/I NO. PR2002076
HL-1850/1870N 84U-Z23/Z24-010

2. LASER UNIT 2 2

HL-1850/1870N 84U-Z23/Z24-020
3. PAPER FEEDER / MP UNIT REF.NO. CODE Q'TY DESCRIPTION 1 ULJOINT ULFEED ROLLER ASSY 3 ULBUSH LJFIRST FEED ROLLER ASSY 5A LJPAPER PICK-UP ROLLER ASSY *1 5B LJPAPER PICK-UP ROLLER ASSY 6 LJBUSH L 7 LJBUSH R 8 LJSEPARATION PLATE ASSY 9 LJMP PRESSURE PLATE ASSY 10 LJMP COVER 11 LJMP PAPER GUIDE LJMP SIDE GUIDE L 13 LJMP SIDE GUIDE R 14 LJMP PAPER GUIDE LJMP PAPER GUIDE LJPROCESS UNIT COVER ASSY 16-1 LJPROCESS UNIT COVER 16-2 LJP COVER LOCK LEVER L 16-3 LJP COVER LOCK LEVER R 16-4 LJLOCK LEVER SPRING 17 LJCASSETTE SENSOR PCB ASSY 18 LJMP SENSOR PCB ASSY 1 TAPTITE, CUP B M3XSCREW, BIND B TITE 3XTAPTITE, CUP B M3XLJRESIST FRONT ACTUATOR 23 LJRESIST FRONT ACTUATOR SPRING 24 LJSTOPPER H 25 LJRESIST REAR ACTUATOR 26 LJRESIST REAR ACTUATOR SPRING 27 LJPE ACTUATOR H 28 LJCA ACTUATOR 29 LJMP-PE SENSOR ACTUATOR LJMP-PE SENSOR ACTUATOR LJROLLER COLLAR SPRING 32 LJROLLER COLLAR WASHER 33A LJROLLER COLLAR 33B LJROLLER COLLAR

PR2002067 REMARK

*1 A component part of the PAPER FEEDING KIT. Refer to "16. PERIODICAL MAINTENCE PARTS".

T/I NO. PR2002067

3. PAPER FEEDER / MP UNIT

PR2002067

33B 7 5B 11
1 5A 33A 27 16-4 16-2 16-3 16-33A 10
HL-1850/1870N 84U-Z23/Z24-041
4. DUPLEX REF.NO. CODE Q'TY DESCRIPTION 1 LJEXIT ROLLER UNIT 1-1 LJEXIT ROLLER ASSY ZLH 1-2 ULPINCH ROLLER ASSY ULPINCH ROLLER SPRING 1-3 1-4 LJREAR COVER SENSOR PCB ASSY 1-2 TAPTITE, BIND B M4X10 1-1 TAPTITE, CUP B M3XLJDX OUTER CHUTE ASSY 2-1 LJDX OUTER CHUTE 2-2 LJFRAP 2 2-3 LJFRAP 2 SPRING 3 LJDX REAR CHUTE 4 LJREAR COVER C 5 LJFAN MOTOR 60 B UNIT 6 LJDX FEED ASSY HE 6-1 LJROLLLER HOLDER HE 6-2 UHPRESSURE ROLLER 6-3 LJGROUND WIRE 6-4 LJDX FEED ROLLER ASSY 6-5 LJSIDE REGIST ROLLER 6-6 LJT-BELT B40S2M142 6-7 LJT-BELT B40S2M224 6-8 LJSIDE REGIST ROLLER HOLDER 6-9 LJGUIDE ACTUATOR 6-10 LJGUIDE ACTUATOR SPRING 6-11 LJDX PAPER ACTUATOR 6-12 LJPAPER ACTUATOR SPRING 6-13 LJSHOULDER TAPTITE, BIND B 3X7.5A 6-3 TAPTITE, BIND B M3X8 6-1 SCREW, BIND M3X4 6-1 TAPTITE, BIND M3XLJDRIVE GEAR 14
MODEL HL-1850/1870N 84U-Z23/Z24-042

4. DUPLEX

1-1-5 1-2 1-6 1-2 1-1-3 1-3 1-4
2-6-14 2-2 6-14 6-3 6-6-7 6-13 6-6 6-5 6-9 6-6-10 6-2 6-12 6-8 6-4 6-1 6-2 6-1 6-15
HL-1850/1870N 84U-Z23/Z24-042
5. PAPER CASSETTE REF.NO. CODE Q'TY DESCRIPTION 1 LJPAPER TRAY ASSY HE BRO 1-1 LJPRESSURE PLATE ASSY LGL 1-2 ULPERSSURE PLATE SPRING 1-3 ULSIDE GUIDE L 1-4 ULSIDE GUIDE R 1-5 ULSIDE GUIDE RACK 1-6 ULSIDE GUIDE GEAR 1-7 ULFRICTION SPRING 1-8 LJPAD HOLDER ZLH ASSY JPN *2 1-9 LJSEPARATION PAD SPRING 350 1-10 LJPAPER INDICATOR 1-11 ULLOCK LEVER 1-12 ULHELICAL EXTENSION SPRING 1-13 LJPRESSURE ROLLER HOLDER 1-14 LJPRESSURE ROLLER COLLAR 1-15 LJPRESSURE ROLLER SHAFT 1-16 LJPAPER TRAY COVER 1-17 LJTRAY COVER FILM 1-18 LJSCRATCH SPONGE HOLDER ASSY 1-19 LJSCRATCH SPONGE SPRING 1-20 LJTRAY LOCK LEVER 1-21 ULPAPER REAR GUIDE 1-22 UUTAPTITE, PAN B M3X8 1-1 TAPTITE, CUP B M3X8 1-24 UFTAPTITE, TORX PAN B M3X8

PR2002029 REMARK CHNG

*2 A component part of the PAPER FEEDING KIT. Refer to "16. PERIODICAL MAINTENCE PARTS".
MODEL HL-1850/1870N 84U-Z23/Z24-045

T/I NO.PR2002029

5. PAPER CASSETTE
1-3 1-4 1-8 1-1 1-21 1-9 1-14 1-15

1-18 1-2 1-19 1-13

1-12 1-10 1-11

1-7 1-5 1-6 1-23 1-16

1-24 1-17
HL-1850/1870N 84U-Z23/Z24-046
6. FIXING UNIT REF.NO. CODE Q'TY DESCRIPTION 1 LJFIXING UNIT, 115V (SP) 1 LJFIXING UNIT, 230V (SP) 1-3 LJHEAT ROLLER 25 HE 1-4 ULHR BEARING 25 1-5 LJHALOGEN LAMP, 115V HE 1-5 LJHALOGEN LAMP, 230V HE 1-6 LJEJECT PINCH ROLLER HOLDER L 1-7 LJEJECT PINCH ROLLER HOLDER R 1-8 LJEJECT PINCH ROLLER F 1-9 LJEJECT PINCH SPRING 1-10 LJPICK OFF FINGER ASSY 2 1-11 LJTHERMISTOR ASSY HE 1-12 ULPR BUSH 1-13 LJPR SPRING HE 1-14 LJCLEANER PINCH ROLLER ASSY 1-15 LJPRESSURE ROLLER 25 1-16 LJTHERMISTOR RELAY PCB ASSY 1-17 LJPAPER EJECT ACTUATOR 1-18 LJEJECT ACTUATOR SPRING 1-19 LJEJECT SENSOR PCB ASSY 1-1 TAPTITE, CUP B M3X6 1-1 TAPTITE, CUP B M3X12 1-1 SCREW, BIND B TITE 3X10 1-23 LJHEATER HARNESS ASSY 1-24 LJHR GEAR 34 HE 1-25 LJSCREW, PAN (WASHER) M2.6X6
MODEL HL-1850/1870N 84U-Z23/Z24-050

- 10 -

6. FIXING UNIT 1 1-18 1-9 1-23
1-7 1-17 1-6 1-8 1-10 1-8

1-25 1-14 1-4

1-11 1-2 1-19 1-16 1-22 1-25 1-4 1-1 1-3
1-12 1-13 1-24 1-15 1-12 1-13
HL-1850/1870N 84U-Z23/Z24-050/051
7. COVERS REF.NO. CODE Q'TY DESCRIPTION 1 LJSIDE COVER R 2 LJSIDE COVER L ASSY 3 LJPAPER STOPPER 4 LJPAPER STOPPER S 5 LJTOP COVER 6 LJPANEL COVER ASSY 6-1 LJPANEL COVER 6-2 LJPANEL LIGHT GUIDE 6-3 LJKEY 6-4 LJKEY TOP A 6-5 LJKEY TOP B 6-6 LJPANEL PCB ASSY 6-7 LJLCDLMG161S6-TPT 6-8 LJBACK LIGHT PCB ASSY 6-9 LJDIFFUSION FILM 6-10 LJLCD HOLDER 6-3 TAPTITE, CUP B M3X8 6-3 TAPTITE, CUP B M3XLJACCESS COVER 8 LJREAR COVER R 9 LJREAR COVER L 10 LJBROTHER EMBLEM 11 LJPRINTED LCD COVER ASSY LJPRINTED LCD COVER ASSY 1870N 12 LJLASER CAUTION LABEL H 13 LJHEATER CAUTION LABEL REAR 14 LJMYLAR LABEL 1850 FRONT 16 UHPATENT LABEL (US) 16 LJMARKING LABEL N/S (Norway/Sweden) 16 LJHOT LINE LABEL (Swiss) 16 UHC-TICK MARK (Australia) 17 UFSHOULDER SCREW