HP LaserJet 3050, LaserJet 3052, LaserJet 3055 Service Manual
HP LaserJet 3050/3052/3055 All-in-One
Service Manual
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7 Parts and diagrams
● Ordering parts and supplies
● Accessories
● Diagrams
● HP LaserJet 3050 all-in-one scanner assembly
● HP LaserJet 3052/3055 all-in-one scanner assembly
● Printer (product base), HP LaserJet 3050/3052/3055 all-in-one
● Alphabetical parts list
● Numerical parts list
ENWW 281
Ordering parts and supplies
Parts that wear
The parts on the product that wear are listed in Table 3-1 Life expectancies on page 38. Parts are
available directly from Hewlett-Packard at the following Website: www.hp.com/buy/parts.
Parts
Order replacement parts from the following Website: www.hp.com/buy/parts
World-wide customer support
Order documentation and software from the Websites listed in Table 7-1 Technical support Websites
and related documentation on page 282:
Table 7-1 Technical support Websites and related documentation
HP Connect Online
(for HP partners)
www.connect-online.hp.com
HP Customer Care Call Centers
Information for contacting HP call centers in specific countries/
regions
www.hp.com/support/callcenters
HP Online Technical Support
Software drivers, support documentation, and answers to
frequently asked questions
www.hp.com/support
HP Technical Training (North America)
Classes and schedules
www.compaq.com/training
Note: Select your country/region in the "select a country or
region" field at the upper-right corner of the page.
Parts
Parts information
www.hp.com/buy/parts
282 Chapter 7 Parts and diagrams ENWW
Accessories
The following accessories are available for the HP LaserJet 3050/3052/3055 all-in-one.
Table 7-2 Accessories
Product name Description Part number
Print cartridge 2,000-page cartridge Q2612A
Toner cloth Ideal for wiping up toner spills 5090-3379
Scanner hinge tool Use this tool to keep the scanner assembly from falling
off of the printer when the entire assembly is being
removed.
5185-7441
Fax telephone cord 2-wire 3-meter (9.8-f00t) fax telephone cord 8121-0811
USB cable 2-meter (6.6-foot) USB cable 8121-0539
USB cable 0.6-meter (2-foot) USB cable 8121-0549
Power cord, 1.8-meter (6-foot) U.S./Canada 8120-8382
Power cord, 1.8-meter (6-foot) Europe 8121-0516
Power cord, 1.8-meter (6-foot) UK 8121-0517
Power cord, 1.8-meter (6-foot) Danish 8121-0518
Power cord, 1.8-meter (6-foot) Switzerland 8121-0519
Power cord, 1.8-meter (6-foot) South America 8121-0520
Power cord, 1.8-meter (6-foot) Israel 8121-0521
Fax dongle 2-wire to 4-wire adapter (U.S.) Q3093-80004
ENWW Accessories 283
Documentation
Table 7-3 Documentation
Description Languages Part number
Service manual (this manual) English only Q6502-90901
Service and support training CD English only Q6502-60115
Getting started guides English only Q6502-90902
English, French, Spanish, Portuguese, Italian, German, Dutch Q6502-90903
English, Swedish, Norwegian, Finnish, Greek, Danish, Hebrew Q6502-90904
English, Russian, Estonia, Lithuanian, Latvian, Kazakh, Arabic Q6502-90905
English, Czech, Hungarian, Polish, Slovak Q6502-90906
English, Slovenian, Bulgarian, Croatian, Romanian, Turkish Q6502-90907
English, Chinese simplified, Chinese traditional, Thai, Indonesian,
Korean, Vietnamese
Q6502-90908
User guides (print on demand) English only Q6500-90929
Czech Q6500-90930
Dutch Q6500-90931
French Q6500-90932
German Q6500-90933
Hungarian Q6500-90934
Italian Q6500-90935
Korean Q6500-90936
Polish Q6500-90937
Russian Q6500-90938
Chinese simplified Q6500-90939
Spanish Q6500-90940
Swedish Q6500-90941
Chinese traditional Q6500-90942
Thai Q6500-90943
Turkish Q6500-90944
Portuguese Q6500-90945
284 Chapter 7 Parts and diagrams ENWW
Common hardware
The product has three common fasteners. See Table 7-4
Common fasteners
on page 285 for a
description of these screw types.
Table 7-4 Common fasteners
Example Description Size Part Number Use
Screw, machine, truss
head
M3X6
M2X10
XA9-1495-000CN
XA9-1501-000CN?
Used to secure metal to
metal
Screw, w/washer M3X8
M3X6
M3X6
XA9-1420-000CN
XB2-7300-605CN
XB2-8300-609CN
Used to secure metal
components to metal
components (for
example, a ground wire
to the frame)
Screw, self-tapping BH3X6
M4X10
BH3X6
XB9-1503-000CN
XB4-5401-009CN
XB4-7300-609CN
Used to secure
anything to plastic
Screw, tapping,binding
head
M3X6 XB4-5300-609CN Used to secure
anything to plastic
Screw, D M3X6 XA9-1670-000CN Used to secure metal
components to metal
components (for
example, a ground wire
to the frame)
How to use the parts lists and diagrams
The figures in this chapter illustrate the major subassemblies in the product and their component parts.
A table (material list) follows each exploded assembly diagr am. Each table lists the reference designator,
the associated part number for the item, and a description of the part.
Parts that have no reference designator or part number are not field-replaceable units (FRUs) and
cannot be ordered.
While looking for a part number, pay careful attention to the voltage listed in the description column to
make sure that the part number selected is for the correct product mo del.
Replacing the printer engine assembly
This table describes the components that can be transferred from a failed printer engine assembly to
the replacement printer engine assembly. In addition to the components listed in this table, trays, CDROM drives, and power cords can also be reused.
ENWW Accessories 285
Table 7-5 Replacing the printer engine assembly
HP LaserJet 3050 all-in-one HP LaserJet 3052/3055 all-in-one
Replacement print engine
● Q6504-67001; 110 V print engine (new)
Q6504-69001; 110 V print engine (exchange)
or
● Q6504-67002; 220 V print engine (new)
Q6504-69002; 220 V print engine (exchange)
Plus the following components
Replacement print engine
● Q6502-67001; 110 V print engine (new, HP LaserJet
3052 all-in-one)
Q6503-67001; 110 V print engine (new, HP LaserJet
3055 all-in-one)
Q6502-69001; 110 V print engine (exchange,
HP LaserJet 3052 all-in-one)
Q6503-69001; 110 V print engine (exchange,
HP LaserJet 3055 all-in-one)
or
● Q6502-67002; 220 V print engine (new, HP LaserJet
3052 all-in-one)
Q6503-67002; 220 V print engine (new, HP LaserJet
3055 all-in-one)
Q6502-69002; 220 V print engine (exchange,
HP LaserJet 3052 all-in-one)
Q6503-69002; 220 V print engine (exchange,
HP LaserJet 3055 all-in-one)
Plus the following components
The correct LIU
● Q2663-60001 US/WW LIU
2
or
● Q2687-60002 EMEA LIU
2
The correct LIU
3
● Q2663-60001 US/WW LIU
2
or
● Q2687-60002 EMEA LIU
2
Formatter components
● Q7844-60002; HP LaserJet 3050 all-in-one formatter
PCA
● I/O plate
1
● Safety shield
1
● LAN port plate
1
Formatter components
● Q7528-60001; HP LaserJet 3052 all-in-one formatter
PCA
or
● Q7529-60002; HP LaserJet 3055 all-in-one formatter
PCA
● I/O plate
1
● Safety shield
1
● Jack plate (HP LaserJet 3052 all-in-one only)
Link assembly and springs
● RM1-0896-000CN; Scanner link assembly, left
● RM1-0897-000CN; Scanner link assembly, right
● RU5-2885-000CN; Scanner spring, compression (qty 2)
Link assembly and springs
● Q6502-67903; Scanner link assembly, kit
286 Chapter 7 Parts and diagrams ENWW
HP LaserJet 3050 all-in-one HP LaserJet 3052/3055 all-in-one
Scanner-top components
● Scanner base-frame assembly
● RL1-0376-000CN; Scanner sheet, grounding
● RK2-1214-000CN; Scanner flat, flexible cable
● RM1-3076-000CN; Scanner cover, left
● RM1-3077-000CN; Scanner cover, right
● RM1-3063-000CN; Scanner-frame assembly
● RC1-8416-000CN; Scanner top cover
● RK2-1209-000CN; Control-panel assembly
Scanner-top components
● Q6502-60117; ADF lid
● Q1636-40036; Hinge retainer clip (Solar lock)
● Q6502-60117 Scanner assembly
● 7121-8285; HP jewel, control panel
The correct control panel
● Q6502-60101; HP LaserJet 3052 all-in-one control panel
or
● Q65036-60101; HP LaserJet 3055 all-in-one control
panel
1
The metal I/O plate, safety shield, jack plate, and LAN port plate are not FRUs and cannot be ordered. These metal components
must be transferred from the failed printer engine assembly to the replacement assembly.
2
The EMEA LIU is used in Europe only. All other e use the U.S./WW LIU.countries/regions worldwid
3
The HP LaserJet 3052 all-in-one does not have fax capabilities and does not require a LIU.
Table 7-5 Replacing the printer engine assembly (continued)
ENWW Accessories 287
Diagrams
Component locations, HP LaserJet 3050/3052/3055 all-in-one printer
(product base)
2
1
Figure 7-1 Major components
1 Fuser assembly
2 Paper-pickup assembly
288 Chapter 7 Parts and diagrams ENWW
12
3 4 5 6
7
Figure 7-2 Solenoid, sensors, switches, and motor
1 Print-cartridge-door switch
2 Power switch/power supply
3 Paper-width sensor
4 Paper-delivery sensor
5 Top-of-page sensor
6 Solenoid
7 Motor
ENWW Diagrams 289
1
2
Figure 7-3 PCBs
1 Engine controller unit (ECU)
2 Formatter
NOTE For the HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one, the LIU is attached to the
formatter. The HP LaserJet 3052 all-in-one does not have fax capabilities, and does not use an LIU.
290 Chapter 7 Parts and diagrams ENWW
Main wiring
Formatter
HP LaserJet 3050
J2
Figure 7-4 Main wiring, HP LaserJet 3050 all-in-one scanner as sembly
ENWW Diagrams 291
J6
P11
P18
P6
P17
J5
Formatter
HP LaserJet 3050
Figure 7-5 Main wiring, HP LaserJet 3050 all-in-one printer (product base)
292 Chapter 7 Parts and diagrams ENWW
Formatter
HP LaserJet 3052/3055
Scanner sub-assembly (SSA)
Flatbed
motor
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
LCD and key switch / LED PCA
Front panel
P2
777
7
888
8
999
9
101010
10
11
11
11
11
444
4
555
5
666
6
111
1
222
2
333
3
ADF
ADF motor
Paper
sensors
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
ADF cover
ADF detect
ADF paper 1
ADF paper 2
AC inverter
PCA
CCFL bulb
Scanner PCB
CCD sensor
(soldered to PCB)
J1J1J1J1J1
J2J2J2J2J2
FFC
cable
CCD scanner assembly
J1
J2
P3
J3
Figure 7-6 Main wiring, HP LaserJet 3052/3055 all-in-one scanner assembly
ENWW Diagrams 293
J8
P15
P22
P10
P21
J7
NOTE: Connector P22 is on the
HP LaserJet 3055 all-in-one only.
J5
LAN interface
Formatter
HP LaserJet 3052/3055
Figure 7-7 Main wiring, HP LaserJet 3050/3052/3055 all-in-one printer (product base)
294 Chapter 7 Parts and diagrams ENWW
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