HP LaserJet 3380 all-in-one service manual - ENWW

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●●●●Wrapping jam—The paper-delivery sensor (PS921) does not detect the trailing edge ofthe media within 0.1 second after the paper-top sensor (PS911) detects the leading edgeand 1 second has passed since the paper-delivery sensor (PS921) detected the leadingedge.Delivery-stationary jam—The paper-delivery sensor (PS921) does not detect the leadingedge of media within 1.6 seconds after the paper-top sensor (PS911) detects the trailingedge.Residual paper jam—The paper-top sensor (PS911) or the paper-delivery sensor(PS921) detect media during the initial rotation period.Door open jam—The paper-top sensor (PS911) or the paper-delivery sensor (PS921)detect media while the print-cartridge door is open.Solenoid, photosensors, and switchesThe following figure shows the locations of the solenoid, photosensors, and switches.Figure 4-11.Solenoid, photosensors, and switches1 Paper-delivery sensor (PS921) senses when paper has successfully moved out of the fusing area.2 Power switch.3 Paper-top sensor (PS911) detects the leading and trailing edges of the paper. It synchronizes thephotosensitive drum and the top of the paper.4 Engine-test switch (SW201), see Engine test for an explanation of the switch.5 Door-open switch (SW301) detects whether or not the print-cartridge door is closed and the printcartridge is installed properly. Printing cannot continue until the print-cartridge door is closed and theprint cartridge is in its correct position.6 Solenoid (SL1) activates the pickup roller.7 Paper-detection sensor (PS931) senses when paper is in the media input tray or the priority inputtray.88 Chapter 4 Operational overview ENWW
Fax functions and operationThe following sections describe the fax capabilities of the product.PSTN operationThe public switched telephone network (PSTN) operates by having a central office (CO) thatgenerates a constant voltage on the TIP and RING wires (48 V, usually). A device goes onhookby connecting impedance (such as 600 ohms for the U.S.) across TIP and RING,allowing a line current to flow. The CO can detect this current and can send impulses, such asdial tones. The product generates more signaling tones, such as dialing digits, to tell the COhow to connect the call. The product can also detect tones, such as a busy tone from the CO,that tell it how to behave.When the call is finally connected, the CO behaves as if it were a piece of wire connecting thesender and receiver. This is the period during which all of the fax signaling and data transferoccurs. When a call is completed, the circuit opens again and line current flow ceases,removing the CO connection from both the sender and the receiver.All of this is done with a two-wire arrangement. The two wires are called TIP and RING on allphone systems. On most phone systems, the wires appear on pins 3 and 4 of the RJ-11modular jack (the one on the LIU). These two wires do not have to be polarized because allthe equipment works with either TIP or RING on pin 3 and the other wire on pin 4. This meansthat cables of either polarity can interconnect and will still work.These are the basic functions of PSTN operation that are assumed in the design of the faxsubsystem. The product generates and detects the signaling tones, currents, and data signalsthat are required to transmit and receive faxes on the PSTN.The fax subsystemThe formatter, LIU, firmware, and software all contribute to the fax functionality. The designsof the formatter and LIU, along with parameters in the firmware, determine the majority of theregulatory requirements for telephony on the product.The fax subsystem is designed to support V.34 fax transmission, lower speeds (such as V.17fax), and older fax machines.Formatter in the fax subsystemThe formatter contains the modem chipset (DSP and CODEC) that controls the basic faxfunctions of tone generation and detection, along with channel control for the faxtransmissions.The CODEC and its associated circuitry act to control transmit and receive gains, and tocompensate for transmission signal coupling into the receive channel. The formatter alsocontains circuitry that adds termination impedance to help match the telephone networkimpedance.LIU in the fax subsystemTwo versions of LIU are used in the HP LaserJet 3380 all-in-one. One is used in the NorthAmerican, South American, and Asian countries/regions. The other is used primarily inEuropean countries/regions.ENWW Fax functions and operation 89
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hpLaserJet 3380all-in-oneservice
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Copyright Information© 2004 Copyri
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Copy, scan, and start controls ....
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Left and right support covers (fron
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viiiENWW
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Table 7-22. Paper-pickup assembly (
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Figure 3-38. Replacing the ADF pick
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Figure 5-89. Remove the ECU pan (2
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Product configurationHardware descr
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Product featuresThe HP LaserJet 338
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Product identificationModel and ser
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Table 1-3. HP LaserJet 3380 all-in-
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Table 1-6. HP LaserJet 3380 all-in-
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Warranty statementHP PRODUCTHP Lase
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Extended warrantyIn most countries/
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Non-U.S. returnsNon-U.S. customers
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An FCC-compliant telephone cord and
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IC CS-03 requirementsNOTICE: The In
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Safety statementsLaser safety state
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Regulatory information for the Euro
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Operating environmentPlace the prod
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Alphanumeric buttonsUse the alphanu
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Control-panel menu structureUse the
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Table 2-1. Control-panel menu struc
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Product media specificationsThe pro
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Guidelines for using mediaUse the i
Page 54 and 55: Envelopes with double-side seamsAn
Page 56 and 57: Loading mediaThis section provides
Page 58 and 59: Media information for the flatbedUs
Page 60 and 61: 4. Adjust the media guides until th
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Page 64 and 65: Life expectancies of parts that wea
Page 66 and 67: Cleaning the productWARNING!Before
Page 68 and 69: NoteThis process requires using a t
Page 70 and 71: 5. Plug the product in, and use the
Page 72 and 73: User-replaceable partsThe following
Page 74 and 75: 8. Reinstall the print cartridge, a
Page 76 and 77: 6. With one hand, position the new
Page 78 and 79: 3. Install the new ADF by inserting
Page 80 and 81: 5. Lower the green lever so that th
Page 82 and 83: 3. Align the tab in the center of t
Page 84 and 85: Basic functionsThis chapter present
Page 86 and 87: The timing diagram in Figure 4-2. P
Page 88 and 89: Table 4-2. Basic sequence of operat
Page 90 and 91: Product startup messagesThe LED dis
Page 92 and 93: Scanner and ADF functions and opera
Page 94 and 95: ADF paper path and ADF sensorsThe f
Page 96 and 97: The ECU controls the following syst
Page 98 and 99: ● +3.3 Vdc: FormatterLaser/beam-d
Page 100 and 101: Paper-motion monitoring and control
Page 102 and 103: 6. Fusing stage—During this proce
Page 106 and 107: The following are features that are
Page 108 and 109: Line current controlThe dc current
Page 110 and 111: 94 Chapter 4 Operational overview E
Page 112 and 113: To reinstall the paper lift-plate a
Page 114 and 115: ●●●Unplug the power cord from
Page 116 and 117: Scanner/printer separation required
Page 118 and 119: 4. Lift the right side of the produ
Page 120 and 121: 4. Open the print cartridge door an
Page 122 and 123: 2. Press the round, green button (c
Page 124 and 125: 2. Unsnap the ADF document-feed gui
Page 126 and 127: 2. Use a #8 torx driver to remove t
Page 128 and 129: Control panel1. Four sliding tabs a
Page 130 and 131: 2. Remove the control-panel chassis
Page 132 and 133: 2. Disconnect four cables from the
Page 134 and 135: ADF scanner glassCAUTIONAvoid touch
Page 136 and 137: 3. Open the left-side door, and rem
Page 138 and 139: External componentsThis section inc
Page 140 and 141: 3. Remove two screws (callout 1).1F
Page 142 and 143: 2. On both sides, pull the connecti
Page 144 and 145: CAUTIONWhen removing the front cove
Page 146 and 147: Printer assembliesThis section incl
Page 148 and 149: Transfer upper guide assemblyNoteIt
Page 150 and 151: 5. To separate the LIU PCA from the
Page 152 and 153: 3. Remove three screws (callout 1).
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5. Remove two screws (one shown in
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2. Remove two screws (callout 1) on
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4. Remove the screw (callout 3) on
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Pickup assembly1. Remove the right-
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3. Remove the solenoid clutch gears
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7. If you want to remove the pickup
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7. Remove the right plate assembly.
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Bottom assembliesThis section inclu
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9. Gently lift the ECU pan in the p
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6. Remove one screw (callout 3) fro
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158 Chapter 5 Removal and replaceme
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Locations of connectors and switche
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Is the product ready?The control pa
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Does the product receive a fax?Use
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Control-panel messagesThe majority
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Table 6-1. Alert and warning messag
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Critical error messagesCritical err
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Table 6-2. Critical error messages
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Table 6-3. Event-log codes (continu
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Pages do not print.CauseThe product
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Vertical lines appear on the printe
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The toner is loose, and it does not
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Pages are skewed (crooked).CauseThe
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Vertical white stripes appear.Cause
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Vertical white stripes appear.Cause
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Scanned images have black dots or s
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Repetitive image-defect rulerUse th
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3. Grasp the handle on the print ca
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Print is misaligned on the page (sk
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You are notified of a media jam by
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Solving scanner (copier) paper-feed
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Solving problems with digital subsc
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NoteDo not connect more than three
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Functional checksUse the following
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4. Open the print cartridge drum sh
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NoteUse only isopropyl alcohol to c
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●●paper pickup-roller motiondri
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6. Turn on the product. It should s
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2. Use the < or > button to select
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Table 6-4. Fax receive codes (conti
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Table 6-4. Fax receive codes (conti
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Table 6-5. Fax send codesCode Descr
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Table 6-5. Fax send codes (continue
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Table 6-7. Appropriate responsesCom
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Table 6-8. Fax abbreviations (conti
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Figure 6-10.NoteExample of a T.30 t
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Service-mode functionsUse the follo
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4. Use the < or > button to navigat
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To perform NVRAM init1. Turn off th
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Table 6-9. System settings (continu
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Figure 6-13. Main wiring (2 of 2)24
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Locations of connectors and switche
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Ordering parts and suppliesPartsOrd
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Table 7-4. Cables and power cords (
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Scanner assembliesFigure 7-1.Scanne
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Figure 7-2.Scanner covers and ADF25
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Figure 7-3.ADF rollers and separati
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Figure 7-4.Control-panel assembly26
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External assembliesFigure 7-5.Exter
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1 2S1S739S7485S9107S66S9Figure 7-6.
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S11Figure 7-7.Paper tray266 Chapter
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Internal assembliesFigure 7-8.Inter
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S10S7S7S7S5S7S6Figure 7-9. Internal
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S5S8S5S9S5S8S6S5S9S7Figure 7-10. In
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S6S8S5S7S5Figure 7-11.Right plate a
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S5Figure 7-12.Left plate assembly27
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S3S3S2Figure 7-13.Electrical compon
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S9S4S10S9Figure 7-14. Paper-pickup
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S4S9S12S9S10S10S10S10Figure 7-15. P
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S4S4S6S9S4S10Figure 7-16.Fuser asse
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Alphabetical parts listTable 7-24.
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Table 7-24. Alphabetical parts list
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Table 7-25. Numerical parts list (c
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uffer memory 75buttonsalphanumeric
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element, heatingcheck 210operations
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Llabel, model and serial number 6la
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photosensorslocating 88paper feed s
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serial number 6service menu 33servi
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312 Index ENWW
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