Brother HL-3450CN Series User manual

Brother Color Laser Printer
PARTS REFERENCE LIST
MODEL: HL-3450CN
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-PRN033

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 / PWB No., Revision , and Parts location mounted on the PCB /
PWB.)
Note : No orders without Parts Code or Tool No. can be accepted.
< Example >
REF.NO. CODE Q’TY DESCRIPTION SYMBOL REMARK
Revision No.: marked on the main printed circuit board.
B48K056 - 201A
Revision No.: marked on the power supply PCB.
Rev: 0B
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, 2002.
4. Parts are subject to change in design without prior notice.
(1) (4)
(3)
(2)
D
esign change indication
S
pecification No .
P
attern alteration No.
C
ircuit board No.
D
esign change indication

TABLE OF CONTENTS
1. DRIVE................................................................................................... 1
2. FRAME................................................................................................. 3
3. LASER UNIT......................................................................................... 5
4. MEDIA CASSETTE .............................................................................. 5
5. TRANSFER UNIT................................................................................. 7
6. PAPER EXIT UNIT............................................................................... 7
7. FUSING UNIT....................................................................................... 9
8. MAIN PCB ............................................................................................ 9
9. COVER............................................................................................... 11
10. MCTL PWB......................................................................................... 13
11. IOD PWB............................................................................................ 13
12. LOW-VOLTAGE POWER SUPPLY UNIT .......................................... 15
13. HIGH-VOLTAGE POWER SUPPLY UNIT.......................................... 15
14. AC CORDS......................................................................................... 17
15. ACCESSORIES.................................................................................. 17
16. PACKING MATERIALS...................................................................... 19
17. PERIODICAL REPLACEMENT PARTS............................................. 19
18. HARD DISK (OPTION)....................................................................... 21

1. DRIVE
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2231001 1 MAIN MOTOR 3
2 LJ2232001 1 BD3 GEAR ASSY
3 LJ2233001 1 MAIN GEAR UNIT 3
4 LJ2234001 1 DEVELOPER DRIVE MOTOR 3
5 LJ2235001 1 DEVELOPER DRIVE UNIT 3
6 LJ2275001 1 EP3 GEAR ASSY
7 UH3494001 1 PAPER PICK-UP CLUTCH
8 LJ2227001 1 FUSER CLUTCH 3
9 LJ2229001 1 CLEANER CLUTCH 3
10 LJ2230001 2 TR CAM CLUTCH 3
11 UH3495001 1 REGIST CLUTCH
12 LJ2228001 4 DEVELOPER CLUTCH 3
13 LJ3723001 1 SL3 BD GEAR SET
14 LJ3729001 1 SL3 DE GEAR L17
15 LJ3730001 1 SL3 MD GEAR 15 (DC)
MODEL HL-3450CN 54S-312
-1-

1. DRIVE
- 2 -
MODEL HL-3450CN 54S-312
1
2
15
13
3
4
5
67
8
9
10
11
12
10
14

2. FRAME
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2251001 1 COOLING FAN PS
2 LJ2236001 1 COOLING FAN OZ
3 LJ2272001 1 OZONE FILTER PS
4 UH1946001 3 INTERLOCK SWITCH
5 LJ2239001 1 PAPER SIZE SENSOR 3
6 UH1948001 6 PAPER SENSOR
7 UH1949001 2 BELT SENSOR
8 LJ2242001 1 TONER SENSOR ASSY 3 A: Toner sensor (TTR) + B: Toner sensor (TPD)
9 LJ2243001 1 OHP SENSOR 3
10 LJ2204001 1 WASTE TONER FEEDER 3 (U)
11 LJ2214001 1 DRUM CLEANER 3
12 LJ2215001 1 TRANSFER DRUM 3
13 UH3485001 1 PAPER PICK-UP ROLLER
14 LJ2317001 1 SEPARATOR PAD 2
15 LJ2218001 1 ERASE LAMP 3
16 LJ2274001 2 ERASE HOLDER
17 UH3488001 1 OIL SENSOR
18 LJ2224001 1 FUSER CONNECTOR 3
19 LJ2248001 1 WASTE TONER FEEDER 3 (L)
20 LJ2252001 1 WT HOLDER ASSY
21 LJ2254001 1 SW BUTTON 3
22 LJ2271001 1 TONER KEY SENSOR
23 LJ3722001 1 SL3 BC CHARGER
24 LJ3727001 1 FP3 CASSETTE GUIDE SET
25 LJ3760001 2 PAPER GUIDE D3 (N) P
26 LJ3728001 1 SL3 PAPER GUIDE D (2 PCS)
27 LJ3731001 1 TR TERMINAL BASE 3
MODEL HL-3450CN 54S-312
Against Transfer roller
jams.(see the service manual
for instruction and limitations)
-3-

2. FRAME
- 4 -
MODEL HL-3450CN 54S-312
2
8(B)
4
4
21
24
1
3
710
11
15
17
25
27
16
14
5
13
9
6
6
19
20
18
12
23
4
6
6
66
8(A)
22
16
7
26

3. LASER UNIT
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2213001 1 OPTICAL UNIT 3
MODEL HL-3450CN 54S-312
4. MEDIA CASSETTE
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2273001 1 PAPER CASSETTE A3
2 LJ2318001 1 ENVELOPE ADAPTOR 3
MODEL HL-3450CN 54S-312
-5-

MODEL HL-3450CN 54S-312
3. LASER UNIT
4. MEDIA CASSETTE
- 6 -
MODEL HL-3450CN 54S-312
1
2
1

5. TRANSFER UNIT
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2209001 1 TRANSFER UNIT 3
1-1 LJ2210001 1 TR UNIT COVER 3
1-2 LJ2211001 1 TRANSFER ROLLER 3
1-3 LJ2212001 1 PAPER DISCHARGER 3
6. PAPER EXIT UNIT
REF.NO. CODE Q'TY DESCRIPTION REMARK
1 LJ2192001 1 PAPER EXIT UNIT 3
1-1 LJ2193001 1 PAPER EXIT UNIT COVER 3
1-2 LJ2194001 1 PAPER EXIT FRONT COVER 3
1-3 LJ2195001 1 PAPER EXIT UPPER COVER 3
1-4 LJ2196001 1 PAPER EXIT ROLLER 3
1-5 LJ2197001 1 DISCHARGING BRUSH 3
1-6 LJ2198001 1 COOLING FAN EX
1-7 LJ2199001 1 PAPER EXIT FILTER
MODEL HL-3450CN 54S-312
-7-