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HP Color Laserjet 2550
KEYWORD PART NUMBER DESCRIPTION
 
Airflow Guide RB2-9904-000CN Airflow Guide (duct) - Black plastic
    insert piece which runs the width of the
    printer and has an air flow hole on right
    side - Directs air flow from the fan on
    the left side of the printer to the
    fusing assembly - Snap locks in center
    rear of printer
 
  RB9-0901-000CN Airflow guide (duct) / fan holder bracket
    assembly (Alloy Gray plastic) - Mounts on
    the left metal side frame assembly
 
Arm RB3-0089-000CN Top cover rack arm (Black) - Plastic arm
    with teeth on bottom edge - Disengages
    the imaging drum/transfer assembly drive
    cams when the top door is open - Mounts
    on the right side of the top cover door
 
Belt RB1-8668-030CN Feed guide drive belt - Small belt
    approximately 5/16 inch wide with 'A'
    shaped ribs on it - Between the feed
    drive roller and the small center roller
    Driven via the transfer roller gear
    train
 
  RB3-0063-000CN Paper feed belt - Small black rubber belt
    approximately 1/8 inch wide with little
    'A' shaped ribs on it - Goes between the
    feed drive roller and the pulley rollers
    (eight used)
 
Bushing RB2-3043-000CN Left roller bushing - Acts as the bearing
    and retainer for the left end of the
    paper pickup roller assembly (tray 1) -
    Mounts on the left side of the front
    frame assembly
 
  RB2-3044-000CN Right roller bushing - Acts as the
    bearing and retainer for the right end of
    the paper pickup roller assembly (tray 1)
    Mounts on the right side of the front
    frame assembly
 
  RB2-9809-000CN Bushing/shaft retainer assembly (White
    plastic) - Holds the rotation drive shaft
    in the left side plate of the toner
    cartridge carousel (rotary) assembly
 
  RB3-1094-000CN Bushing assembly (Black plastic bushing
    with small guide roller on top) - Holds
    the right end of the transfer roller
    assembly in the middle frame assmebly
 
  RB9-0879-000CN Bushing/shaft retainer assembly (Black
    plastic) - Holds the rotation drive shaft
    in the right side plate of the toner
    cartridge carousel (rotary) assembly
 
  RS5-1635-000CN Shaft bushing - For the paper pickup
    clutch gear shaft - Mounts on the plate
    of the multipurpose paper pickup gear
    assembly
 
  RS5-1637-000CN Bushing (black plastic) - Mounts on the
    right end of the registration roller
    assembly
 
  RS5-1638-000CN Bushing - For the registration roller
    gear drive shaft - Mounts on the right
    side of the front frame assembly
 
Cable RG5-6971-000CN Cable assembly (two 3-pin connectors and
    a spad lug) - Power cable for the fusing
    assembly - From fusing assembly connector
    to the chassis ground and the low voltage
    power supply board
 
  RG5-7106-000CN Cable assembly (two 2-pin connectors) -
    Connects between the low voltage power
    supply board (J401) and the formatter
    board (J1003)
 
  RG5-7108-000CN Cable assembly (two 8-pin connectors,
    Purple wire) - Connects between the low
    voltage power supply board (J403) and the
    DC controller board (J133)
 
  RG5-7109-000CN Cable assembly (two 7-pin connectors) -
    Connects between the DC controller board
    (J119) and the fusing assembly connector
    (J201)
 
  RG5-7114-000CN Cable assembly (two 4-pin connectors)
    with shield - Connects between the
    cartridge drive motor (J705) the DC
    controller board (J106)
 
  RG5-7115-000CN Cable assembly (two 3-pin connectors) -
    Connects between the roller engaging
    photosensor (J714) and the DC controller
    board (J115)
 
  RG5-7117-000CN Cable assembly (two 3-pin connectors) -
    Connects between the engaging sensor
    (J712) on the toner cartridge carousel
    and the DC controller board (J125)
 
  RG5-7122-000CN Cable assembly - 'Y' type cable (three
    connectors) - The 14-pin connector splits
    into an 8-pin connector and a 6-pin
    connector
 
  RG5-7123-000CN Grounding cable assembly - Connects from
    the optional tray connector housing to
    the metal right side frame assembly
 
  RG5-7126-000CN Cable assembly (two 5-pin connectors) -
    Connects between the sub-high voltage
    board (J505) and the high voltage board
    (J503)
 
  RG5-7128-000CN Cable assembly (four 3-pin connectors) -
    Connects between the DC controller board
    (J107 and J138) and the leading edge
    paper sensor for the fusing assembly
    (J720) and the registration sensor (J711)
 
  RG5-7129-000CN Cable assembly (two connectors and two
    spade lugs) - From toner cartridge
    contacts on the left carousel side plate
    to the cable (J512 and J511) that runs to
    the high voltage power supply board
 
  RG5-7130-000CN High voltage cable assembly - Connects
    between the high voltage board spring
    contacts (on the middle frame assembly)
    and the cables for the toner cartridge
    carousel left plate assembly (J511 and
    J512)
 
  RG5-7145-000CN Front cable assembly (six connectors) -
    From various components on the front
    frame assembly and right side to the DC
    controller board
 
  RG5-7146-000CN High voltage cable assembly (two 15-pin
    connectors and two 14-pin connectors) -
    Connects between the high voltage power
    supply board (J501 and J502) and the DC
    controller board (J136 and J135)
 
  RG5-7620-000CN Cable assembly (two 5-pin connectors) -
    Connects between the DC controller board
    (J139) and the fusing assembly drive
    motor (J702)
 
  RG5-7621-000CN Cable assembly (two 8-pin connectors) -
    Connects between the low voltage power
    supply board (J402) and the DC controller
    board (J134)
 
  RG5-7622-000CN Upper cable assembly (seven connectors) -
    Interconnects various upper level
    components to the DC controller board
 
  RG5-7624-000CN Cable assembly (two 3-pin connectors) -
    Connects between the waste toner sensor
    PC board (J61) and the DC controller
    board (J108)
 
  RH2-5524-000CN Flat flexible cable (FFC) assembly -
    Connects between the laser/scanner
    assembly (J11) the DC controller board
    (J102)
 
Cable (Interface) C2950A IEEE 1284 Bi-Tronics parallel cable -
    DB-25 (M) connector (type A) to 36-pin
    Centronics (M) connector (type B) - 2.0m
    (6.6ft) long
 
  C2951A IEEE-1284 Bi-Tronics parallel cable -
    DB-25 (M) connector (type A) to 36 pin
    Centronics (M) connector (type B) - 3.0m
    (9.8ft) long
 
  8121-0712 Universal Serial Bus (USB) interface
    cable - Type 'A' connector to type 'B'
    connector - 0.6m (24-inches) long
 
  C6518A Universal serial bus (USB) interface
    cable - Type 'A' connector to type 'B'
    connector - 2.0m (6.6ft) long
 
Carousel RG5-7587-000CN Carousel (rotary) assembly - Includes the
    carousel assembly, the support assembly,
    end plates, drive gears and shaft,
    sensors, and cables - Mounts towards the
    rear of the printer in front of the rear
    frame assembly
 
Cartridge Q3960A HP Color LaserJet smart Black print
    cartridge - Will print approximately
    5,000 pages based on a 5% print density
 
  Q3961A HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
 
  Q3962A HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
 
  Q3963A HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
 
  Q3971A HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
 
  Q3972A HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
 
  Q3973A HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
 
  Q3960-67901 HP Color LaserJet smart Black print
    cartridge - Will print approximately
    5,000 pages based on a 5% print density
    (not for Europe)
 
  Q3961-67901 HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (not for Europe)
 
  Q3962-67901 HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (not for Europe)
 
  Q3963-67901 HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (not for Europe)
 
  Q3960-67902 HP Color LaserJet smart Black print
    cartridge - Will print approximately
    5,000 pages based on a 5% print density
    (Europe)
 
  Q3961-67902 HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (Europe)
 
  Q3962-67902 HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (Europe)
 
  Q3963-67902 HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    4,000 pages based on a 5% print density
    (Europe)
 
  Q3971-67901 HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    2,000 pages at based on a 5% print
    density (not for Europe)
 
  Q3972-67901 HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
    (not for Europe)
 
  Q3973-67901 HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
    (not for Europe)
 
  Q3971-67902 HP Color LaserJet smart Cyan print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
    (Europe)
 
  Q3972-67902 HP Color LaserJet smart Yellow print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
    (Europe)
 
  Q3973-67902 HP Color LaserJet smart Magenta print
    cartridge - Will print approximately
    2,000 pages based on a 5% print density
    (Europe)
 
Clamp WT2-5700-000CN Cable clamp - White plastic clamp with
    mounting pin - Mounts on the upper right
    side of the front frame assembly and the
    lower left side of the middle frame
    assembly (two used)
 
Cleaning Supplies 5090-3379 Toner cleaning cloth - Specially treated
    cloth for absorbing toner (1 per package)
    Ideal for clening up toner spills
 
Clip WT2-5056-000CN Cable clip - 'C' shaped White plastic -
    Mounts in the opening on the cover for
    the paper pickup solenoid
 
  WT2-5737-000CN Cable clip - One mounts on the left side
    of the middle frame and two on the base
    assembly pan (three used)
 
  XD2-1100-322CN Retainer E-ring clip - Used to secure the
    electromagnetic clutch assembly (CL1) on
    the paper pickup shaft
 
  XD2-1100-502CN E-ring clip - Secures the dual gear to
    the drive shaft which drives the
    registration roller - Located on the
    inside of the front frame assembly
 
Clutch RH7-5366-000CN Electromagnetic clutch assembly (24V) -
    Electrical clutch between the clutch
    drive gear and shaft - (CL1) Engages the
    registration roller assembly
 
  RH7-5335-000CN Electromagnetic clutch assembly (24VDC) -
    Electrical clutch between the clutch
    drive gear and shaft - (CL2) Engages the
    roller within the imaging drum/transfer
    assembly from the main gear train
 
Connector RH2-5519-000CN Connector assembly - For optional paper
    tray - Mounts to the bottom right side of
    the middle frame assembly
 
Control Panel RG5-7570-000CN Control panel assembly (mechanical only)
    - Includes the 'Rotate Carousel', 'Cancel
    Job' and the 'Go' buttons, plus the
    various indicator light pipes - All
    switches and LED's are on the formatter
    PC board - Mounts to the top of the right
    cover assembly
 
Cover RB3-0052-000CN Gear Cover (Small Black plastic cover) -
    Covers the left end of the feed drive
    shaft - Mounts towards the left side of
    the middle frame assembly
 
  RB3-0104-000CN Roller cover - Covers the multipurpose
    paper pickup roller assembly - Mounts on
    the lower front of the front frame
    assembly
 
  RB3-0120-000CN Solenoid cover (Steel) - For magnetic
    wave sheilding
 
  RB3-1108-000CN Front inner cover (Graphite Black
    plastic) - Mounts on the front frame
    above the multi-purpose input tray
 
  RB3-1112-000CN Interface bezel (Alloy Gray plastic) -
    Vertical cover that surronds the
    interface connectors
 
  RB9-0880-000CN Upper rear cover (Alloy Gray plastic)
 
  RB9-0881-000CN Face-down paper output cover (L-Shaped
    Graphite Black plastic) - Serves as the
    rear of the tray for the face-down output
    tray on top of the printer
 
  RB9-0897-000CN Front lower cover (Graphite Black
    plastic) - Front lower strip below the
    multipurpose input tray - Has recessed
    area for the printer logo
 
  RG5-7567-000CN Top cover assembly (Graphite Black
    plastic) - Includes the molded-in
    face-down output tray and the lift-up top
    cover door assembly
 
  RG5-7569-000CN Right side cover assembly (Light Gray
    plastic) - Includes the DIMM memory door
 
  RG5-7571-000CN Left side cover assembly (Alloy Gray
    plastic) - Includes the power switch
    button, rod and spring (The power switch
    is located on the low voltage power
    supply board)
 
  RB9-0886-000CN Left side cover ONLY (Alloy Gray plastic)
    Does not include any attaching parts
 
Damper RB2-6248-000CN Damper assembly (Gray plastic piece with
    small 13-tooth gear on it) - Helps to
    reduce clunking when the paper pickup
    roller is engaged - Engages the paper
    pickup roller - Mounts on the right side
    of the front frame assembly
 
Door RB9-0884-000CN DIMM memory door (Alloy Gray perforated
    plastic) - Access door for adding or
    removing printer memory or font DIMM -
    Mounts on the right side cover
 
  RF5-4069-000CN Top cover door (Graphite Black plastic) -
    For accessing the toner cartridges and
    the imaging drum/transfer assembly -
    Mounts to the top cover frame
 
Drive Assembly RG5-7592-000CN Rotary drive assembly - Includes the
    carousel rotating motor (DCM703), toner
    cartridge drive motor (PM705), developing
    rotary stopper solenoid (SL93), bracket,
    and gears - Mounts on the right top rear
    of the print engine
 
Drum Q3964-67901 Imaging drum/transfer assembly cartridge
    Inserts into printer through the top
    door - Life expectancy is 20,000 pages
    for black print ONLY, 5,000 pages for
    color (typical combined life is
    approximately 8,000 to 10,000 pages)
 
  Q3964A Imaging drum/transfer assembly cartridge
    Inserts into printer through the top
    door - Life expectancy is 20,000 pages
    for black print only, 5,000 pages for
    color (typical combined life is
    approximately 8,000 to 10,000 pages)
 
Fan RH7-1537-000CN Cooling fan (Panaflo Model FBA08T24H -
    80mm X 80mm X 15mm high, DC brushless,
    24V DC, 190mA) - (FM712) Mounts in the
    airflow guide/fan bracket assembly on the
    left side of the printer
 
Film (Transparency) C2934A Color LaserJet transparency film - A size
    (8.5 x 11-inches) - 50 sheets per box
 
  C2936A Color LaserJet transparency film - A4
    size (21.0cm x 29.7cm) - 50 sheets per
    box
 
Flag RB2-9925-000CN Sensor arm and flag - Activates the
    photosensor (Does NOT include the roller)
 
  RB3-0111-000CN Paper flag - Plastic rod with paper
    sensing flag on one end and sensor
    activator flag on the other - Senses
    paper coming from the multi-purpose front
    input tray (tray 1)
 
  RB3-0135-000CN Test print flag (Black lever) - Used to
    activate the print engine test switch -
    Mounts in a metal holder in the upper
    left of the front frame assembly
 
Foot RB2-6297-000CN Rubber foot - Square self-adhesive rubber
    foot - Attaches to the rear of the middle
    frame assembly (two used)
 
Fusing Assembly RG5-7572-110CN Fusing assembly - For 110V to 127V AC
    operation - Bonds the toner to the paper
    with heat - Slides in and locks in lower
    rear of printer
 
  RG5-7573-000CN Fusing assembly - For 220V to 240V AC
    operation - Bonds the toner to the paper
    with heat - Slides in and locks in lower
    rear of printer
 
Gear RB3-0022-000CN 22 tooth gear (Black plastic) - Small
    gear with diagonally cut teeth - Idler
    gear between the transfer roller assembly
    and the feed drive shaft - Mounts on the
    left side of the middle frame assembly
 
  RB3-0091-000CN 16 tooth gear (Black plastic) - Gear with
    large stop tooth and shaft lock tab -
    Used as part of the mechanism to
    disengage the drive cams for the imaging
    drum/transfer assembly - Mounts on the
    inside of the right side metal chassis
    assembly
 
  RB3-0092-000CN 15 tooth gear with drive shaft (Black
    plastic) - Used as part of the mechanism
    to disengage the drive cams for the
    imaging drum/transfer assembly - Mounts
    on the right side metal chassis frame
 
  RS7-0418-000CN 26 tooth gear (Black plastic) - Has 1/8th
    portion of gear cut away - Mounts on the
    end of the paper pickup roller for the
    multipurpose input tray (Tray 1)
 
  RS7-0424-000CN Dual gear - 20 tooth / 40 tooth - Mounts
    between the right side of the front frame
    assembly and the paper pickup gear plate
    assembly
 
  RS7-0425-000CN 30 tooth gear (White plastic) - Part of
    the drive gears for the registration
    roller - Mounts on inside of the front
    frame assembly on the right side
 
  RS7-0426-000CN Dual gear - 26 tooth / 50 tooth (White
    plastic) - Part of the drive gears for
    the registration roller - Mounts on
    inside of the front frame assembly on the
    right side
 
  RS7-0428-000CN 30 tooth gear (White plastic) - Mounts on
    the end of the registration roller drive
    shaft
 
  RS7-0429-000CN 26 tooth gear (White plastic) - Has
    recess for shaft drive pin - Paper pickup
    clutch drive gear - Mounts between the
    right side of the front fame assembly and
    the paper pickup gear plate assembly
 
  RS7-0435-000CN Dual gear - 32 tooth / 37 tooth (White
    plastic) - Drives the upper top bin
    output roller - Mounts on the right side
    of the rear frame assembly
 
  RS7-0436-000CN Dual gear - 37 tooth / 43 tooth (White
    plastic) - Part of the gear train for
    driving the upper top bin output roller -
    Mounts on the right side of the rear
    frame assembly
 
  RS7-0437-000CN 51 tooth gear (White plastic) - Main
    drive gear for both the upper and lower
    top bin output rollers
 
  RS7-0570-000CN 81 tooth gear - Mounts on a pin on the
    right side plate front assembly (between
    the gear retaining bracket and the right
    side plate)
 
  RS7-0571-000CN Dual gear - 23 tooth / 54 tooth - Small
    gear that mounts toward the front on a
    short shaft between the gear retainer
    bracket and the right side plate front
    assembly
 
  RS7-0572-000CN Dual gear - 31 tooth / 90 tooth - Mounts
    on a pin on the right side plate front
    assembly (between the gear retaining
    bracket and the right side plate)
 
  RS7-0573-000CN 186 tooth gear - Uppermost large gear
    that mounts on a short shaft between the
    gear retainer bracket and the right side
    plate front assembly
 
  RS7-0574-000CN Dual gear - 32 tooth / 123 tooth - Large
    gear which mounts toward the front on the
    right side plate front assembly
 
Gear Assembly RG5-6938-000CN Gear assembly - Metal plate with two
    White plastic gears attached - Part of
    the drive gears for the paper pickup
    roller for the multipurpose input tray
    (tray 1) - Mounts on the right side of
    the front frame assembly
 
Guide RB2-9852-000CN Rotary release guide - Small plastic clip
    that allows for manual carousel rotation
    (with a straightened paper clip) for
    removing toner cartridges without power -
    Mounts in the top front of the rotary
    drive assembly
 
  RB2-9903-000CN Cable guide (Quartz Gray plastic) -
    Protects and supports the upper cable
    assembly - Mounts to the right rear on
    the laser/scanner support assembly
 
  RB2-9954-000CN Left paper feed guide (small Black
    plastic arm) - Mounts to the left of the
    separation pad assembly on the lower
    front frame assembly
 
  RB2-9955-000CN Right paper feed guide (small Black
    plastic arm) - Mounts to the right of the
    separation pad assembly on the lower
    front frame
 
  RB3-1088-000CN Transfer inlet guide assembly - Angled
    metal guide between the registration
    roller and the transfer roller - Mounts
    to the middle frame assembly
 
  RF5-4065-000CN Entrance guide assembly - Mounts in front
    of the tranfer roller assembly (behind
    the transfer inlet guide)
 
  RG5-7584-000CN Paper guide assembly - Paper width
    adjustable guide assembly for the
    multipurpose front input tray (tray 1) -
    Mounts with the two hinges on the lower
    portion of the front frame assembly
 
Hinge RB9-0889-000CN Tray hinge - 'L' shaped plastic arm - For
    the left side of the multi-purpose front
    input tray (tray 1) - Mounts in the lower
    portion of the front frame assembly
 
  RB9-0890-000CN Tray hinge - 'L' shaped plastic arm - For
    the right side of the multipurpose front
    input tray (tray 1) - Mounts in the lower
    portion of the front frame assembly
 
Holder RB2-9924-000CN Sensor assembly mounting holder - Holds
    the leading edge paper sensor (PS720) for
    the fusing assembly - Mounts on the
    underside left on the middle frame
    assembly
 
  RB3-0006-000CN Holder - Housing for the fusing connector
    assembly - Mounts on the lower base pan
    of the printer mechanism
 
  RB3-0023-000CN Interlock switch holder (Quartz Gray
    plastic) - Does NOT include the
    micro-switch - Mounts on the support
    shelf for the laser/scanner assembly
    (just to the left of the laser/scanner
    assembly)
 
Insulator RB3-0007-000CN Insulating sheet (Transparent plastic) -
    Mounts between the bottom pan and the
    high and low voltage power supply boards
 
  RB3-1110-000CN Insulating sheet (Transparent plastic) -
    For the power supply base assembly -
    Mounts to the underside of the middle
    frame assembly
 
Interface (Product) J3265A External JetDirect 500X LAN interface
    module - Interfaces up to 3 parallel
    printers to an ethernet 10Base-T (RJ-45),
    10Base2 (BNC), or 100Base-TX (RJ-45) LAN
 
  J3258B External JetDirect 170X LAN interface
    module - Interfaces a parallel printer to
    an ethernet 10Base-T (RJ-45) LAN
 
  J6035C HP JetDirect 175X Fast Ethernet external
    print server - Has on 4-pin USB connector
    and one RJ-45 LAN connector - Connects to
    the printer via the USB port and the
    network via the LAN port
 
  J3263A External JetDirect 300X LAN interface
    module - Interfaces a parallel printer to
    an ethernet 10Base-T (RJ-45) or
    100Base-TX (RJ-45) LAN
 
  J6061A JetDirect 380X external IEEE-802.11b
    (Wi-Fi) wireless print server - Connects
    to printer using Universal Serial Bus
    (USB) cable
 
  J7942A HP JetDirect en3700 external print server
    Fast Ethernet Internet connector for
    sharing peripherals with USB ports, in a
    10/100 TX LAN environment - Has one USB
    2.0 printer port and one RJ-45 10/100
    Base-TX connector - Includes software and
    power module
 
Label Q2550A White full-sheet labels - A size (8.5 x
    11-inches) - 25 sheets
 
  Q2551A White full-sheet labels - A size (8.5 x
    11-inches) - 100 sheets
 
  Q2587A White labels - 1 x 2.63-inches - 30
    labels per sheet, 25 sheets per box
 
  Q2588A White labels - 1 x 2.63-inches - 30
    labels per sheet, 100 sheets per box
 
  Q2589A White address labels - 1.33 x 4-inches -
    14 labels per sheet, 25 sheets per box
 
  Q2590A White address labels - 1.33 x 4-inches -
    14 labels per sheet, 100 sheets per box
 
  Q2591A White address labels - 2 x 4-inches - 10
    labels per sheet, 25 sheets per box
 
  Q2592A White address labels - 2 x 4-inches - 10
    labels per sheet, 100 sheets per box
 
  Q2593A White address labels - 0.5 x 1.75-inches
    - 80 labels per sheet, 25 sheets per box
 
  Q2594A White address labels - 3.33 x 4-inches -
    6 labels per sheet, 100 sheets per box
 
  RS6-8662-000CN Image cartridge label - Shows the imaging
    drum/transfer assembly removal steps -
    Mounts on the right side of the front
    inner cover (Visible when the top cover
    is lifted)
 
  RS6-8668-000CN High voltage caution label - Mounts on
    the airflow guide / fan bracket assembly
 
Laser/Scanner RG5-6880-000CN Laser/scanner assembly - Mounts in the
    center of the scanner support assembly
 
Manual 5851-1468 LaserJet printer family paper
    specification guide
 
Memory (DIMM) C7845-67901 32MB, 100-pin SDRAM DIMM memory module
 
  Q1887-67901 64MB, 100-pin SDRAM DIMM memory module
 
  C9121-67901 128MB, 100-pin SDRAM DIMM memory module
 
Memory (Product) C7845A 32MB, 100-pin SDRAM DIMM memory module
 
  Q1887A 64MB, 100-pin SDRAM DIMM memory module
 
  C9121A 128MB, 100-pin SDRAM DIMM memory module
 
Motor RF5-4063-000CN Main motor assembly - Large motor mounted
    on a controller PC board - (DCM701)
    Mounts on the inside of the metal right
    side frame assembly
 
  RH7-1628-000CN Fusing motor assembly - 24VDC motor
    mounted on a motor controller PC board -
    (DCM702) Mounts on the right side plate
    assembly (next to the DC controller
    board)
 
  RG5-7593-000CN Rotary motor assembly - (DCM703) Rotates
    the four color toner cartridges in the
    carousel to position one of them for
    printing
 
  RH7-1533-000CN Stepping motor - 24V DC - (PM704) swings
    (or engages) the toner cartridge carousel
    in place to transfer toner - Mounts on
    the left side of the rear frame assembly
 
  RH7-1535-000CN Stepping motor (24V) - (PM705) used to
    drive the internal rollers and mechanisms
    in the toner cartridge when it has been
    rotated in the printing position on the
    carousel
 
Nameplate/Logo Q3702-67902 LaserJet 2550L Nameplate - Mounts in the
    recessed area on the front lower cover
 
PC Board Q3702-67901 Formatter board assembly - Includes the
    formatter board and all the metal cage
    covers - Mounts towards the rear on the
    metal right frame assembly
 
  RG5-6964-000CN Carousel position and toner level
    photoelectric sensor PC board - 'L'
    Shaped PC board with the two sensors -
    (PS51) Mounts on the left plate in the
    toner cartridge carousel assembly
 
  RG5-6967-000CN Registration sensor PC Board - Small
    board with flag activated photosensor -
    (PS711) Mounts in the registration
    assembly on the underside of the middle
    frame
 
  RG5-7607-000CN Waste toner sensor assembly PC board -
    Detects excess level of waste toner in
    the imaging drum/transfer assembly
    cartridge - Mounts on the right side of
    the front frame assembly
 
  RG5-7611-030CN DC controller board - Mounts on the right
    side of the printer (Behind the formatter
    board assembly)
 
  RG5-7612-000CN Top of page photoelectric sensor PC board
    Includes the photoelectric top of page
    sensor and the print engine test switch -
    Mounts on the right side of the printer
    (Behind the formatter board assembly)
 
  RH7-7146-000CN Density photoelectric sensor PC board -
    (PS81) Mounts under the light blocking
    pad on the top of the front frame
    assembly
 
  WG8-5382-000CN Sensor PC board - Small board with flag
    activated photosensor - (PS718) Paper
    sensor for the multipurpose tray - Mounts
    in the lower right of the front frame
    assembly
 
Pad RF5-4012-000CN Separation pad assembly - Includes the
    separation pad, holder and spring -
    Mounts below the multipurpose front input
    (Tray 1) pickup roller assembly
 
  RF5-4047-000CN Light blocking pad assembly - Black
    plastic frame with soft rubber gasket and
    stiff conductive Mylar piece (grounded) -
    Mounts to the top center of the front
    frame assembly
 
Paper Q1298A LaserJet Satin finish tough paper - A
    size (8.5 x 11-inches) - Will not tear
    and will withstand outdoor weather
    conditions - Can print on both sides
 
  Q1298B LaserJet Satin finish tough paper - A4
    size (21.0cm x 29.7cm) - Will not tear
    and will withstand outdoor weather
    conditions - Can print on both sides - 50
    sheets per box
 
  Q2413A Premium LaserJet cover paper -
    Heavyweight (75lb), smooth finish on both
    sides, 96 brightness - A size (8.5 x
    11-inches) - 100 sheets per box
 
Paper (Glossy) Q2415A Soft gloss LaserJet paper - Soft gloss
    finish on both sides, 95 brightness - A
    size (8.5 x 11-inches) - 500 sheets per
    box
 
  Q2417A Soft gloss LaserJet paper - Soft gloss
    finish on both sides, 95 brightness - A4
    size (21.0cm x 29.7cm) - 250 sheets per
    box
 
  Q6541A Soft gloss, bright white LaserJet paper -
    A size (8.5 x 11-inches) - 200 sheets per
    box
 
  Q6542A Soft gloss, bright white LaserJet paper -
    A4 size (21.0cm x 29.7cm) - 200 sheets
    per box
 
  Q6545A Glossy LaserJet paper - Gloss finish on
    both sides, 95 brightness - A size (8.5 x
    11-inches) - 200 sheets per box
 
  Q6547A Glossy LaserJet paper - Gloss finish on
    both sides, 95 brightness - A4 size
    (21.0cm x 29.7cm) - 200 sheets per box
 
Paper (Matte) Q6543A Matte brochure (Heavyweight) laser paper
    - A size (8.5 x 11-inches) - 150 sheets
    per box
 
  Q6544A Matte brochure (Heavyweight) laser paper
    - A4 size (21.0cm x 29.7cm) - 150 sheets
    per box
 
  Q6549A Photo and imaging LaserJet paper - Matte
    finish on both sides, 96 brightness - A
    size (8.5 x 11-inches) - 100 sheets per
    box
 
  Q6550A Photo and imaging LaserJet paper - Matte
    finish on both sides, 96 brightness - A4
    size (21.0cm x 29.7cm) - 100 sheets per
    box
 
Plate RB2-9916-000CN Mounting/grounding plate - For the
    engaging motor (PM704) - Mounts on the
    upper left side of the rear frame
    assembly
 
  RB3-0057-000CN Transfer slide plate - Small 'U' shaped
    metal insert plates - Mount in the
    bushing wells for the transfer roller on
    the middle frame assembly (two used)
 
  RB3-0065-000CN Contact plate - copper clad metal spring
    - Holds the left end of the small 500
    Meg-ohm resistor
 
  RB3-0066-000CN Contact plate - copper clad metal spring
    - Holds the right end of the small 500
    Meg-ohm resistor - Mounts on the left
    side of the middle frame below the
    entrance guide assembly
 
  RB3-0286-000CN Contact plate - Runs between the shaft on
    the registration roller and the metal
    entrance guide assembly
 
  RB3-1113-000CN Grounding plate - Small plate with
    grounding finger - Grounds the end of the
    carousel drive shaft - Mounts towards the
    top on the left side plate assembly
 
Power Cord 8120-6809 Power cord (Dove Gray) - 2.3m (7.5ft)
    long - Has straight (F) receptacle (for
    240V in the United Kingdom, Hong Kong,
    Singapore, Malaysia)
 
  8120-6810 Power cord (Flint Gray) - 2.3m (7.5ft)
    long - Has straight (F) C13 receptacle
    (for 240V in Australia and New Zealand)
 
  8120-6811 Power cord (Flint Gray) - 17 AWG, 2.3m
    (7.5ft) long - Has straight (F) C13
    receptacle (for 220V in Europe, Saudi
    Arabia, South Africa, India, and Korea)
 
  8120-6812 Power cord (Flint Gray) - 18 AWG, 2.3m
    (7.5ft) long - Has straight (F)
    receptacle (for 120V in the USA, Canada,
    Mexico, Philippines, and Taiwan)
 
  8120-6813 Power cord (Flint Gray) - 17 AWG, 2.3m
    (7.5ft) long - Has straight (F)
    receptacle (for 220V in South Africa,
    Saudi Arabia, and India)
 
  8120-6814 Power cord (Flint Gray) - 17 AWG, 2.3m
    (7.5ft) long - Has straight (F)
    receptacle (for 220V in Denmark)
 
  8120-6815 Power cord (Flint Gray) - 17 AWG, 2.3m
    (7.5ft) long - Has straight (F)
    receptacle (for 220V in Switzerland)
 
Power Supply RG5-7124-000CN Sub-high voltage board - Small auxillary
    PC board - Mounts in a holder just above
    the high voltage board in the bottom pan
    assembly
 
  RG5-7606-000CN High voltage power supply board (HVT)
    assembly - Has contacts for the eight
    high voltage springs in the printer -
    Mounts in the bottom pan assembly
    (Towards the front of the printer)
 
  RH3-2262-000CN Low voltage power supply - For 110VAC to
    127VAC operation - Includes the AC power
    input connector and power switch - Mounts
    in the bottom pan assembly towards the
    rear of the printer
 
  RH3-2263-000CN Low voltage power supply - For 220VAC to
    240VAC operation - Includes the AC power
    input connector and power switch - Mounts
    in the bottom pan assembly towards the
    rear of the printer
 
Pressure Assembly RG5-7589-000CN Carousel pressure (support) assembly -
    Includes the main rear support, E-label
    reader assembly, engaging sensor, and the
    engaging rod shaft - Primary support
    structure for the toner cartridge
    carousel
 
Pulley RB3-0061-000CN Pulley roller (accommodates three feed
    belts) - Small black roller approximately
    3.49cm (1-3/4 inches) long with three
    ball type pulleys - Mounts just behind
    the transfer roller in the middle frame
    assembly (two used)
 
  RB3-0067-000CN Pulley roller (accommodates one feed
    belt) - Small black roller approximately
    1.59cm (5/8 inch) long with one ball type
    pulley - Mounts just behind the transfer
    roller in the middle frame assembly (two
    used)
 
Rack Slide RB3-0090-000CN Rack slide - White plastic piece with
    gear teeth layed out in rack form on both
    sides - Part of the mechanism that
    disengages the imaging drum/transfer
    assembly cams when the top cover is
    opened - Mounts vertically on the metal
    right side frame
 
Reader RG5-6956-000CN E-label reader (contact board ONLY) -
    Connects the cartridge nonvoliatile
    memory to the DC controller board - For
    the imaging drum/tranfer assembly -
    Mounts to the the front frame assembly
 
  RG5-6957-000CN E-label reader assembly - Connects
    cartridge nonvoliatile memory to the DC
    controller board - For the toner
    cartridges - Mounts on top of the toner
    cartridge carousel assembly
 
Resistor RH5-3115-000CN 500 Meg-ohm, 300mW - Mounts on the left
    side of the middle frame below the
    entrance guide assembly - Held in place
    with two small contact plates
 
Rod RB3-0037-000CN Power switch rod - Goes between the power
    button and the power switch on the low
    voltage power supply board - Mounts on
    the left side cover
 
Roller RB2-7195-000CN Sensor flag roller (small White plastic
    roller) - Mounts in the sensor arm flag
    for the leading edge paper sensor for the
    fusing assembly (PS720)
 
  RB2-9909-000CN Pressure roller (small Black hard plastic
    'solid' roller) - Presses against the
    lower top bin output roller on the middle
    rear of the printer (two used)
 
  RB3-0012-000CN Belt roller - Small oval shaped roller
    approximately 1-3/4 inches long - Mounts
    toward the center of the metal feed plate
    on the middle frame assembly
 
  RB3-0160-000CN Paper pickup roller ('D' shaped) - Mounts
    on the paper pickup roller assembly for
    the multipurpose front input tray (tray
    1)
 
Roller Assembly RF5-4067-030CN Transfer roller assembly - Long black
    foam type roller - Transfers static
    charge to paper - Mounts towards the
    front and on top of the middle frame
    assembly
 
  RG5-6897-020CN Upper top bin output roller assembly -
    Includes the shaft with four rubber
    rollers, two bushing/shaft retainers, two
    anti-reversing flaps, and the drive gear
    Mounts on the top rear of the printer
 
  RG5-6939-020CN Registration roller assembly - Includes
    the roller, bushings, mounting plate,
    paper sensor, and the sensor flag -
    Mounts from the bottom toward the front
    center of the middle frame assembly
 
  RG5-6952-000CN Paper pickup roller assembly - Includes
    the shaft, guide assembly cams, the
    D-shaped roller, and roller retainers -
    Picks paper from the multipurpose front
    input tray (tray 1) - Mounts in the lower
    portion of the front frame assembly
 
  RG5-7595-000CN Lower top bin output roller assembly -
    Includes the shaft with four rubber
    rollers, two bushing/shaft retainers, and
    the drive gear - Mounts in the center on
    the rear frame assembly (above the fusing
    assembly)
 
Screw XA9-0849-000CN M3 truss-head phillips screw with machine
    threads - 6mm long - Primarily used to
    secure metal to metal parts
 
  XA9-0890-000CN M3 truss-head phillips screw with machine
    threads - 6mm long - Primarily used to
    secure metal to metal parts
 
  XA9-1262-000CN M4 pan-head phillips screw with
    self-tapping threads - 10mm long - Used
    primarily to secure metal parts to the
    internal plastic frames
 
 
  XA9-1291-000CN M3 pan-head phillips screw with flat
    washer - 8mm long - Secures the side
    covers to the printer mechanism and one
    is used to secure the fusing assembly
    connector holder to the bottom pan
 
  XA9-1328-000CN M3 pan-head phillips screw - 10mm long -
    Used to secure the fusing assembly drive
    motor to the right side plate
 
  XA9-1355-000CN M3 pan-head phillips screw with machine
    threads - 8mm long - Used to secure the
    thermistor to the right side plate and
    the power supply PC boards the the base
    assembly pan
 
Shaft RB3-0011-000CN Feed drive shaft - Long shaft with eight
    feed belt ball type pulleys and one
    ribbed feed guide drive belt pulley -
    Mounts behind the transfer roller on the
    middle frame assembly
 
  RB3-0060-020CN Idler gear shaft - Short metal rod -
    Shaft for the transfer and feed drive
    idler roller - Mounts on the left side of
    the middle frame assembly
 
Shield RB2-9932-000CN RFI shield - Parallel wire form mounted
    over the fan - Mounts on the fan air duct
    assembly on the left side of the printer
 
Shutter RG5-6940-050CN Registration shutter assembly - Includes
    the metal roller, mounting frame,
    grounding springs, and the dual coupling
    gear - Mounts over the registration
    roller at the front of the middle frame
    assembly
 
Sideplate RG5-6942-000CN Left side carousel plate assembly - End
    plate under the rotational toner
    cartridge carousel - Includes all of the
    high voltage contacts for the toner
    cartridges - Mounts on the metal carousel
    support frame
 
  RG5-7579-000CN Main drive (right side plate) assembly -
    Includes the right side plate front
    assembly (with main motor, clutch, and
    gears) and the right side plate rear
    assembly (with drive gears) - Mounts on
    the right side
 
  RG5-7580-000CN Right side plate rear assembly - Includes
    the rear half of the metal right side
    plate and the two associated gears -
    Mounts on rear half of right side of
    printer
 
  RG5-7581-000CN Right side plate front assembly -
    Includes the front half of the metal
    frame assembly, gears, imaging
    drum/transfer assembly drive cams, cover
    engaging mechanism, roller engaging
    clutch (CL2), and main drive motor
    (DCM701) - Mounts on the right side
 
Solenoid RH7-5338-000CN Solenoid assembly - (SL92) Lever on the
    solenoid disengages the stop on the drive
    gear on the paper pickup roller for the
    multipurpose input tray (tray 1)
 
  RH7-5340-000CN Solenoid assembly - (SL93) Engages to
    stop rotation when the proper toner
    cartridge on the carousel is in place for
    printing
 
Spring RB2-9905-000CN Torsion spring - Provides pressure for
    the upper top bin output pressure rollers
    (two used)
 
  RB2-9952-000CN Tray 1 flag spring - Provides torsion for
    the tray 1 paper sensor flag - Mounts in
    the lower portion of the front frame
    assembly
 
  RB2-9999-000CN Torsion spring - Secures the belt roller
    (for the feed drive shaft) in the top of
    the middle frame assembly
 
  RB3-0015-000CN Compression spring - Provides upward
    pressure for the left transfer roller
    bushing
 
  RB3-0016-000CN Electrical contact spring - Spring steel
    wire with compression springs formed on
    both ends - One end provides upward
    pressure on the right bushing for the
    transfer roller - Connects to high
    voltage board
 
  RB3-0042-000CN Electrical contact spring - Mounts on the
    middle frame assembly behind the transfer
    roller - Of the four similar springs,
    this one is next to the one on the far
    left - Connects to high voltage board
 
  RB3-0043-000CN Electrical contact spring - Mounts on the
    middle frame assembly behind the transfer
    roller - Of the four similar springs,
    this one is on the far right - Connects
    to high voltage board
 
  RB3-0044-000CN Electrical contact spring - (Front)
    Provides high voltage to the toner
    cartridge via a cable assembly and
    connection through the carousel plate
    assembly - Connects to the high voltage
    board
 
  RB3-0045-000CN Electrical contact spring - Rear
    electrical contact spring - Provides high
    voltage to the toner cartridge via a
    cable assembly and connection through the
    carousel plate assembly - Connects to the
    high voltage board
 
  RB3-0046-000CN Electrical contact spring - Mounts on the
    middle frame assembly behind the transfer
    roller - Of the four similar springs,
    this one is just to the left of the one
    on the far right - Connects to high
    voltage board
 
  RB3-0047-000CN Electrical contact spring - Mounts on the
    underside of the middle frame assembly -
    Connects to high voltage board
 
  RB3-0048-000CN Electrical contact spring - Mounts on the
    middle frame assembly behind the transfer
    roller - Of the four similar springs,
    this one is on the far left - Connects to
    the high voltage board
 
  RB3-0121-000CN Right retaining spring - Helps to secure
    and ground the imaging drum/transfer
    assembly in the printer - Mounts on the
    upper right side of the front frame
    assembly
 
  RB3-0122-000CN Left retaining spring - Helps to secure
    the imaging drum/transfer assembly in the
    printer - Mounts on the upper left side
    of the front frame assembly
 
  RB3-1065-000CN Torsion spring - Provides pressure for
    the lower top bin output pressure rollers
    (two used)
 
  RS6-2030-000CN Tension spring - Provides support tension
    for the multipurpose front input tray
    guide assembly (two used)
 
  RS6-2759-000CN Compression spring - Provides tension for
    the power switch button - Mounts on the
    left side cover
 
  RS6-2766-000CN Tension spring - Provides a small amount
    of return tension for the sensor flag arm
    on the leading edge sensor for the fusing
    assembly (PS720)
 
Standoff VT2-0012-005CN PC Board support - Plastic standoff for
    supporting a PC board - Supports the high
    voltage board on the base assembly metal
    pan (six used)
 
Static Dissipater RB3-0009-000CN Static eliminator ground plate - Right
    angled metal piece with small teeth on
    top edge - Mounts from underneath on the
    middle frame assembly just behind the
    pulley rollers
 
Support RB3-0062-000CN PC board support (Black plastic holder) -
    For mounting the small sub-high voltage
    board above the high voltage board
 
  RG5-6907-030CN Laser/scanner support assembly (sheet
    metal plate) - Crossmember between the
    two side frames - Support for the
    laser/scanner assembly, the toner
    cartridge carousel drive motor, and the
    cover interlock switch assembly
 
Switch RH7-6051-000CN Microswitch with lever activator - (SW2)
    Senses when the top cover is open -
    Mounts in a holder on the scanner support
    assembly
 
Thermistor RH7-7149-000CN Thermistor - (TH3) For detecting internal
    temperature - Mounts to the metal right
    side frame assembly just above the DC
    controller board
 
Tray Q3709-67901 Replacement 250-sheet paper input feeder
    assembly - Includes tray base which
    attaches to printer, and the paper
    cassette tray - Accommodates 148mm x
    210mm (5.8 x 8.3 inches) to 216mm x 356mm
    (8.5 x 14 inches) media - Only one
    250-sheet feeder supported
 
  Q3709A Optional 250 sheet paper input tray -
    Includes tray base which attaches to
    printer, and the slide out paper tray -
    Accommodates 148mm x 210mm (5.8 x 8.3
    inches) to 216mm x 356mm (8.5 x 14
    inches) media - Only one 250 sheet tray
    supported per printer
 
  Q3710-67901 Replacement optional 500-sheet paper
    feeder assembly - Includes feeder base
    which attaches to tray 2, and the slide
    out paper tray - Note that the optional
    250-sheet feeder assembly must be
    installed first - (Part of Q3710A)
 
  Q3710A Optional 500 sheet paper feeder assembly
    Includes the feeder base which attaches
    to tray 2, and slide out paper tray -
    Accommodates 216mm x 279mm (8.5 x 11in)
    or 210mm x 279mm (8.3 x 11.7in) media -
    Optional 250 sheet feeder must be
    installed first
 
  RB3-0019-000CN Toner catch tray (curved Black plastic
    piece) - Holds residual toner from
    photosensitive drum - Mounts just below
    the toner cartridge carousel on the
    bottom frame assembly
 
Tray Assembly RG5-7585-000CN Multipurpose front input tray assembly
    (tray 1) - Includes the front cover
    piece, pull-out paper support, and the
    flip-out extender - Mounts on front of
    printer (on the front frame assembly)
 
Tray Kit C9706-67901 Multipurpose tray (tray 1) service kit -
    Includes one paper pickup roller and one
    separation pad assembly
 
  C9706-67902 Multipurpose tray (tray 1) service kit
    with extra separation pads - Includes one
    paper pickup roller and three separation
    pad assembly
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