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di 650 service manualBy parts code you can check what other devices it is used. You can print your Parts List or export to Excel to further work with it. We only help you to create your parts list for request from your suppliers. Add your headers and comments. Use saved Parts Lists as templates to create new lists. Change the contents of the old list and save it as new. You can add, delete list items, change headers, comments and quantity of spare parts. Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Translate this page: Relevant OTHER forum topics: Minolta EP-2030 fenymasolo Hellotok! A targybeli fenymasolohoz keresek SM-et. Nem tudom, hogy valaki tudna-e ebben segiteni! Elore is koszonettel: szuts Similar manuals: You can write in English language into the forum (not only in Hungarian). Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime.http://controlapex.com/userfiles/brainworx-bx-control-manual.xml
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Report this Document Download Now Save Save Service Manual Di 650-Eng For Later 0 ratings 0 found this document useful (0 votes) 1K views 376 pages Service Manual Di 650-Eng Uploaded by xerof Description: Full description Save Save Service Manual Di 650-Eng For Later 0 0 found this document useful, Mark this document as useful 0 0 found this document not useful, Mark this document as not useful Embed Share Print Download Now Jump to Page You are on page 1 of 376 Search inside document Browse Books Site Directory Site Language: English Change Language English Change Language. Field Service. Di650. Dual references may be used on the following:Replacing the Developing Suction. Filter. 1-A-1. Removing and Reinstalling the External. Covers. 1-A-2. Changing the Operation Panel Attachment. Resetting the Circuit Breaker. 1-A-6Motor(M2). 1-B-1. Removing and Reinstalling the Fixing. Input Gear. 1-B-2Removing and Reinstalling the. CCD Unit.1-C-1. Replacing the Exposure Lamp.1-C-2. Removing and ReinstallingInstalling the Optics Wire.1-C-4. Cleaning the Slit GlassCleaning the Dust-proof Glass.1-D-2Installing the Coupling. 1-E-2. Removing, Cleaning, and ReinstallingRemoving and Reinstalling the Separation. Claws and Separation Claw Solenoid. 1-E-4. Removing and Reinstalling the Toner. Control Sensor Board. 1-E-6Removing and Reinstalling the Charging. Corona Unit. 1-F-1. Removing and Reinstalling the Charge. Control Plate. 1-F-2. Replacing the Charging Wires. 1-F-2. Removing and Reinstalling the Charging. Wire Cleaning Unit. 1-F-3. Removing and Reinstalling the PCL. 1-F-3. Cleaning the Charging Corona. Separation Corona Unit. 1-F-4. Removing and Reinstalling the Plunger. Prevention Plate. 1-F-5Unit. 1-F-7Removing and Reinstalling the. Developing Unit. 1-G-1. Replacing the Developer. 1-G-2. Cleaning the Developing Unit. Bias shaft. 1-G-3Removing and ReinstallingRemoving and Reinstalling the Toner. Guide Roller (TGR). 1-I-2Feed Unit. 1-J-1. Removing and Reinstalling the Paper.http://eaglescripts.com/userfiles/brainspawn-forte-ensemble-manual.xml Feed Trays 1 and 2. 1-J-1. Feed Roller and Feed Roller Rubber. 1-J-2. Removing and Reinstalling the Double. Feed Prevention Roller Rubber. 1-J-2. Replacing the Pre-registration and. Feed Clutches (MCs). 1-J-3. Replacing the Wires. 1-J-3Feed Unit. 1-K-1. Removing and Reinstalling. Paper Feed Tray 3. 1-K-1. Feed Roller and Feed Roller Rubber. 1-K-2. Feed Prevention Roller Rubber. 1-K-2. Feed Clutches (MCs). 1-K-3. Replacing the Wires.1-K-3Feed Tray. 1-L-1. Feed Roller Rubber. 1-L-1. Replacing the Double Feed Prevention. Roller Rubber. 1-L-2Conveyance Section. 1-M-1. Removing and Reinstalling the Vertical. Conveyance MC (MC11, MC12). 1-M-1Cleaning the Paper Dust. Removing Brush.1-N-1. Cleaning the Paper Mis-centering PS. Removing and Reinstalling the. Registration MC (MC1). 1-N-2. Removing and Reinstalling the Second. Paper Feed Unit. 1-N-3. Cleaning the Registration PS (PS44).1-N-4. Registration Roller. 1-N-5. Pre-transfer Roller. 1-N-6. Cleaning the ADU Paper Reverse. Reverse Roller. 1-N-9Conveyance Roller 3 and 4. 1-N-12. Conveyanece Roller 1 and 2. 1-N-15Removing and ReinstallingRemoving and ReinstallingRemoving and ReinstallingReplacing the Fixing Heater. Lamps (L2, L3).1-O-3. Replacing the Fixing Heater. Lamp(L4).1-O-4. Separation Claw (Upper) Unit and Fixing. Separation Claws (Upper).1-O-5. Separation Claw (Lower) Unit and Fixing. Separation Claws (Lower).1-O-6. Upper Roller.1-O-7. Lower Roller.1-O-8Reinstalling the RADF.1-P-2Conveyance Roller Rubber.1-P-4. Cleaning the Cleaning Pad.1-P-5. Rubber.1-P-5Brush. 1-Q-1. LT first paper feed PS(PS107). 1-Q-1. Paper Feed Roller Unit. 1-Q-2. Feed Roller Rubber. 1-Q-2. Replacing the Double Feed. Prevention Roller Rubber. 1-Q-3. LT first paper feed MC (MC102). 1-Q-5Tray (FN-6 only). 1-R-1. Removing and Reinstalling the Top. Removing and Reinstalling the Side. Cover. 1-R-2. Removing and Reinstalling the Front. Door. 1-R-3. Removing and Reinstalling the Rear. Cover. 1-R-3. Removing and Reinstalling the Main. Tray. 1-R-4.http://www.drupalitalia.org/node/77308 Paper Exit Opening Cover. 1-R-5Feed roller. 1-S-2. Replacing the Double feed preventionCleaning the Punch Edges and Punch. Scraps Full PS (PS802). 1-T-2Paper Exit Opening Cover.1-R-5Replacing the Intermediate Conveyance. Roller (Sponge Roller).1-R-7. Exit Opening Unit.1-R-8Unit Cover.1-R-13. Removing and Reinstalling the Stacker. Unit.1-R-13Unit Cover.1-R-15. Clincher.1-R-16. Stapler.1-R-17Temperature Sensors 1 and 2. 1-O-9. Thermostat (TS1). 1-O-11. Thermostat (TS2). 1-O-12Adjustment. 2-4Setting up the P Function. 2-4List of Adjustment Items for 25 Mode. 2-7. Setting Software DIP Switches. 2-8. Setting the Paper Size. 2-20. PM Count Resetting. 2-22. Setting the PM Cycle. 2-22. Collecting Data. 2-23. Copy Count by Parts to be ReplacedCopy Count by Parts to be ReplacedFax Number of the Service Center. 2-45High Voltage Adjustment. 2-47. Changing Grid Voltage Adjustment. 2-48. Drum Peculiarity Adjustment. 2-49. Drum Peculiarity Adjustment (Manual). 2-55. User Paper Setting. 2-55. Recall Standard DataTray Adjustment. 2-56. Magnification Adjustment. 2-57Hard Disk Check.2-86. Input checklist.2-87. Output checklist.2-92Skew adjustment (Main body).2-100. Adjusting the LCT Paper Feed Roller. Pressure (C-404 only).2-100Skew adjustment (LCT only).2-103. Tray spring pressure adjustment.2-104. Paper feed height (upper limit)Pick-up release amountRADF mounting position adjustment.2-108Maintenance Items. 3-2. Main Body Periodic Inspection Items. 3-10Connecting to the ISW connector.5-4Data flow. 5-2. Prepare the copier to start an ISWPreparing the copier to transfer. 5-3. Relationships between processing statesParts Layout Drawing. 4-1. RADF Parts Layout Drawing. 4-9. LCT Parts Layout Drawing. 4-10. FNS Parts Layout Drawing. 4-11. PI Parts Layout Drawing. 4-14. PK Parts Layout Drawing. 4-15. Connector Layout Drawing. 4-16. LCT Connector Layout Drawing. 4-20. FNS Connector Layout Drawing. 4-20. PI Connector Layout Drawing. 4-21. PK Connector Layout Drawing. 4-21. Jam Code List.http://atmos-service.com/images/bower-sfd328-user-manual.pdf 4-22. Error Code List. 4-32. Timing chart. 4-48. Timing Chart (1). 4-48. Timing Chart (2). 4-49. RADF Timing Chart (1). 4-50. RADF Timing Chart (2). 4-51. LCT Time Chart. 4-52. FNS TIming Chart (1). 4-53. FNS Timing Chart (2). 4-54. FNS Timing Chart (3). 4-55Changes may have been made to this copier to improve its performance after this Service Manual was printed. Accordingly, Minolta Corporation does not warrant, either explicitly or implicitly, that the information contained inTherefore, this Service Manual must be carefully read before doing service work both in the course of technicalKeep this Service Manual also for future service.When servicing the copier, the relevant works (disassembling, reassembling, adjustment, repair, maintenance,DANGER:Action having a high possibility of suffering death or serious injury. WARNING:Action having a possibility of suffering death or serious injury. CAUTION:Action having a possibility of suffering a slight wound, medium trouble, and propertySymbols used for important warning items are defined as follows:General precaution. Electric shock. Heated surface. General prohibition. Do not touch with wet hand. Do not disassemble. General instruction. UnplugMinolta copiers are renowned for their high reliability. This reliability is achieved through high-quality design andCopier design is a highly complicated and delicate process where numerous mechanical, physical, and electricalSuch modifications are therefore strictly prohibited.However, inIn order to maintain safetyWARNING: Wall Outlet. Plug the power cord into the dedicated wall outlet with a capacity greater than the maximum power consumption. If excessive current flows in the wall outlet, fire may result.If excessive current flows in the wall outlet, fire may result. WARNING: Power Plug and Cord.https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16274d140b85cf---brother-hl-5250dn-service-manual.pdf Contact problems may lead to increased resistance, overheating, and theCheck whether the sheath isIf the power plug, cord, or sheath is damaged, replace with a new powerUsing the damagedMake sure the copier-side power plug is securely inserted in the socketSecure the cord with a fixture properly.If the power cord or sheath is damaged, replace with a new power cordIf the power cord (inlet type) is not connected to the copier securely, aOverheating may occur there, leading to a risk of fire.Overheating may occur there, leading to a risk of fire. Using the power plug and wall outlet without removing dust may result inThe risk of electric shock exists. The cable may be broken, leading to a risk of fire and electric shock. WARNING: Wiring. If used, the risk of fire exists. Current that can flow in the extension cord is limited, so using a too longDo not use an extension cable reel with the cable taken up. Fire mayWARNING: Ground Lead. If current leakage occurs in an ungrounded copier, you may suffer electricConnect the ground lead to one of theConnecting the ground lead to an improper point such as the points listedWARNING: Prohibited Installation PlaceA risk of fire exists. A risk of fire and electric shock exists. WARNING: Nonoperational HandlingDust collected around the power plug and outlet may cause fire. CAUTION: Temperature and HumidityA risk of degradation in copier performance or deformation exists. Do not place the copier in a place exposed to cool wind. Recommended temperature and humidity are as follows. Humidity: 10 to 80 (no dew condensation). Avoid other environments as much as possible. CAUTION: VentilationPlace the copier in a well ventilated place to prevent machine problemsIf a bad smell of ozone is present in the following cases, ventilate theCAUTION: VibrationConstant vibration will cause problems. In the case of an earthquake and so on, the copier may slide, leading to aCAUTION: Inspection before Servicing. Manual, technical notices, etc.cysasdo.com/geektic/files/canon-wp-dc11-manual.pdf) and proceed with the inspection following theDo not make anyIf the prescribed procedure or tool is not used, the copier may break and aWhen the power plug is inserted in the wall outlet, some units are still powered even if the POWER switch is turned OFF. A risk of electric shockYou may get burnt. DANGER: Work Performed with the Copier PoweredIf you make adjustments or perform an operation check with the externalHigh-voltage exists around the drum unit. A risk of electric shock exists. WARNING: Safety Checkpoints. The user or CE may be injured.They can short internal circuits and cause electric shock or fire. Current can leak, leading to a risk of electric shock or fire.Current can leak, leading to a risk of electric shock or fire. Current can leak, leading to a risk of copier trouble or fire. Current can leak, leading to a risk of electric shock or fire. WARNING: Safety CheckpointsCurrent can leak, leading to a risk of trouble or fire.The laser light can enter your eye, leading to a risk of loss of eyesight. Do not supply power with the writeThe laser light can enter your eye, leading to a risk of loss of eyesight. Dispose of the used lithium battery using theImproper replacement can cause explosion.A risk of fire exists.If the interlock does not function, you may receive an electric shock or beCurrent can leak, leading to a risk of electric shock or fire.A risk of copier trouble, electric shock, and fire exists.A risk of fire exists.A risk of fire exists.A risk of fire exists. Breathing large quantities of organic solvents can lead to discomfort.If the substances get in the eye, rinse with plenty of water immediately. When symptoms are noticeable, consult a physician. You may be burned due to dust explosion.Therefore, safety can be maintained by the appropriate daily service work conducted by the customerThe customer engineer mustProtection by L2 and L3 (fixing heaterOverall protection circuit.https://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16274d15158782---brother-hl-5250dn-service-manual-pdf.pdf L2 and L3 (fixing heater lamps) overheatingControlOverall Protection CircuitThe output voltage from TH1 (fixing tempera-If this voltage is abnormal, L2 (fixing heater lamp 1), L3CBR1 and CBR2 interrupt the AC line instantaneously when an excessive current flows dueThe output voltages from TH1 and TH2 (fixingTH1 or TH2 exceeds the reference value, L2Since TH1 (fixing temperature sensor)The RL1 function must not be deactivatedWhen the temperature of the fixing rollerDo not changeRADF hinge portions; otherwise youDo not touch. Use careRisque de br lure. SoyezBei Beseitigung von. Papierstaus vorsichtigNon toccare. Agire conWhen disassembling and reassembling the machine, follow the precautions given below.Care should also beNever loosenBe sure the power cord has beenCaution: When replacing the ozone filter, insertCaution. Be sure the power cord has beenCaution: When replacing the developing suction filter, insert it in the opening in theScrew. Developing suction filter. Ozone filter cover. Screw. ScrewOzone filter. Developing suction filter coverCaution: When installing the developing suction filter, the filter-supporting materialOzone filter coverBe sure the power cord has beenOzone filter cover. Rear cover. ScrewsScrewsDeveloping suction filter cover. Right side cover (lower rear). Right side cover (lower middle). Right side cover (lower front). ScrewsTop cover (middle rear). Original stopper plate (rear). Top cover (right). Top cover (middle front). Platen glass. Original stopper plate (left). Shoulder screws. ScrewsReinstalling. Caution. Be sure the power cord has beenOperation panel cover (middle)Operation panel. ScrewsFront right door hinge (lower). Front left door hinge (lower). Front left door. ScrewsCaution1: To remove the operation panel, skipCaution2: When the attachment angle of theCaution: Each relay connector consist of twoRelay connectors (CN163). Relay connectors (CN164). Operation panel. ScrewsOperation panel stopper.http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16274d16ae944d---brother-hl-5250dn-manual-download.pdf ScrewsBe sure the power cord has beenCaution. Connection of cables to circuit breaker 1Circuit breaker 1 (CBR1). Screws (2). Circuit breaker assembly. Circuit breaker 2 (CBR2)Caution. Be sure the power cord has beenProcedure. Draw the drum unit out of the main body. (See. Remove the developing suction cover and right. Remove twenty-one screws and remove theScrews (3). Image control board (ICB). Screws (3). Image control board mounting plateImage control board cover. Screws (7). Image control board mounting plate. Screws (5). Screws (4)Input Gear. Be sure the power cord has beenFlywheels (2). Caution: Hold the fixing motor assembly withFixing motor assembly. Screws (4)Fixing motor cover. Screws (6)Screws (4). Fixing input gear holderFixing input gear. Screws (2)UnitCaution. Be sure the power cord has beenScrews that must not be removed. Caution: Be sure to adjust the image afterScrews that must not be removedRead position adjusting plate screw (1 each)CCD unitRead position adjusting plate (right rear). Read position adjusting plate (left front). Screws that must not be removed. Connector (CN170)rCaution1. Be sure the power cord has beenScrews. Caution2. Do not touch the exposure lamp with bareMarking. CCD unit. Marking. Caution: Mark the place where the CCD unit isCaution: Be sure to check the image afterScrews. Connector. Screws. Exposure lampBe sure the power cord has beenCaution1: When installing the exposure unit,Caution2: Be sure to perform image adjustment after installing the exposureScrewsScrews (loosen)Cord clamp (B). Ground terminal. Connector (CN630). Exposure unit. ScrewsEnsure that theUnused hole. Optics unit positioning jig. V-mirror unit. Stopping surface. For exposure unit positioning. V-mirror unit fixing hole (left)Be sure the power cord has beenCaution1: When winding the optics wire aroundCaution2: When re-tensioning or replacing theCaution3: Be sure to perform image adjustment after replacing or re-installing. Procedure. Remove the exposure unit.www.cxnjl.com/userfiles/files/canon-wp--dc34-manual.pdf Move the V-mirror unit toward the paper exit sideEnsure that thePlace the metal bead at the midpoint of eachStarting at this point, wind the optics wire fiveCaution1: Ensure that there is a metal bead atCaution2: Pull out the outer wire from above theAfter winding the outer wire, secure it to the wireRear. FrontWire stopper. Pulley 1. Drive pulley. V-mirror pulley. Pulley 2At this time, secure the spring fixing plate temporarily with one screw.Spring fixing plate. Exposure unit mounting piece. Spring. ScrewsCaution. Slit glass. ScrewsWarning:Caution. Be sure the power cord has beenCaution: Each relay connector consists of twoFan holder assembly. Relay connector (CN338). ScrewsConnector (CN185). Connector (CN188). Write unit. Figure 1-16 Electroph otogra phic pr ocess blo ck diagra m Laser scanner Cartridge T ransfer roller High-voltage power supply DC controller Fuser Laser beam Engine controller unit 26 Chapter 1 Theo ry of operatio n ENWW Imag e fo rmation cons ists of th e fol lowi ng pro cesse s. Latent-im age fo rmation block. Step 1: prim ary ch arging. Step 2: la ser-bea m exposur e. Developi ng block ? Step 3: devel oping. Transfe r block ? Step 4: transfer ? Step 5: separ ation. Fusing b lock ? Step 6: fusing ? Drum clea ning block. Step 7: dru m cleaning Figure 1-17 Image formation process Drum cleaning Developing 2. Laser-beam exposure Fusing (Fixing) 6. Fusing (Fixing) Delivery 7. Drum cleaning 3. Developing 1. Primary charging Pickup 4. T ransfer 5. Sep aration T ransfer Latent image formation: Media path: Direction of drum rot ation: Block: Step ENWW Image-formati on system 27 Figure 1-18 Primar y chargin g Primary charging bias Photosensitive drum Primary charging roller Laser beam ex posure Step 2: The laser be am sc ans the photos ensitive drum to neutrali ze ne gative c harges on parts of t he drum sur face. An elec trostatic latent i mage i s formed o n the d rum wher e neg ative char ges were neut rali zed. Figure 1-19 Las er beam exposur e Laser beam Unexposed area Exposed area 28 Chapter 1 Theo ry of operatio n ENWW Figure 1-20 Print cartridge Blade Photosensitive drum Unexposed area Exposed area Unexposed area Exposed area Developing roller Developing bias Toner acquires a negative char ge from the fr iction tha t occu rs when the deve loping ro ller r otatesaga inst the developin g blad e. The d evelopin g bias is app lied t o the d evelopin g roller to mak e a potential differe nce bet ween the d evelop ing rolle r and th e photos ensitive drum. The negati vely cha rged toner i s attrac ted to the latent im age on the photosens itiv e drum because the dru m surfa ce has a higher pote ntial. ENWW Image-formati on system 29 Figure 1-21 Tr an sfe r Media Transfer roller Photosensitive drum Transfer bias Step 5: The elasticity of the print media causes its separati on from the pho tosensiti ve drum. A s tatic charge elimin ator aids se paration by weakening any elec trostatic adhesi on. Figure 1-22 Separati on Media Transfer roller Photosensitive drum Static charge eliminator Fusing stage Step 6: The DC negativ e bias appli ed to the fu sing film s trength ens the holdi ng force of t he toner on the print med ia and prevents the tone r from sca ttering. 30 Chapter 1 Theo ry of operatio n ENWW The toner i mage is perm anently a ffixed to the printi ng pape r by heat and pres sure. Figure 1-23 Fusing Media Toner Fuser film Fuser heater Pressure roller Brush Fuser bias Clea ning st age Step 7: The clean ing bl ade scr apes the resi dual to ner o ff of th e photose nsitive drum and de posits i t into the wast e toner cas e. Figure 1-24 Drum cleaning T oner collection box Photosensitive drum Cleaning blade ENWW Image-formati on system 31 Pri nt-ca rtridge det ection happens when the e ngine con trolle r detec ts the pres ence of a genui ne HP print- cartri dge that c ontains a memo ry tag. Ton er d etectio n hap pens as the engine cont roller read s or w rites the d ata that is sto red on the memor y tag. The eng ine cont rolle r renews the in formation in the prescr ibed t iming and reads or writes it from or to the memory tag. The engin e contro ller co mmands the mem ory tag to read or write with the follo wing con ditions. Read ? Power i s on ? The cartr idge do or is clos ed. A comm and is receiv ed from the f ormatte r. Write ? A page o f medi a is printed. A comm and is receiv ed from the f ormatte r When th e engi ne contr oller fails to read or writ e three times i n a row, it de termi nes that th e memo ry tag is abn ormal an d sen ds a car tridge m emory abnorm ality wa rning to th e forma tter. Figure 1-25 Print cartridge memo ry tag 32 Chapter 1 Theo ry of operatio n ENWW Three media-de tectio n sensor s detect pap er as it passes thro ugh the product. If me dia do es not reach o r pass each se nsor within a sp ecified t ime, th e ECU determ ines that a jam has oc curred and alerts the form atter. Paper trays The pr oduct ha s the following pape r tr ays. Tray 1 ( multipurpo se tr ay; all models ). Tray 2 (500-s heet tray; al l model s). Tray 3 ( option al 500-s heet i nput tray; HP Lase rJet P3 015x). Tray 4 (option al 500- sheet input tr ay) ENWW Pickup, fee d, and delive ry system 33 ENWW Pickup, fee d, and delive ry system 35 ENWW Pickup, fee d, and delive ry system 37 PS225; m edia width sensor (detect s media width after the media enters the paper path) Casset te p ickup NOT E: To find the follo wing com ponents, see So lenoid s and clu tches o n page 36. ? SL2; cass ette ( Tray 2) pickup soleno id Tray 1 paper picku p NOT E: To find th e follo wing comp onents, see Phot o sens ors and switc hes on p age 34 and Sole noids and clutc hes on pa ge 36. ? PS205; T ray 1 (multi purpose tray) media -presence sen sor. SL1; Tray 1 (mul tipurpos e tray) pic kup solen oid 38 Chapter 1 Theo ry of operatio n ENWW NOT E: Duple x models includ e a du plex med ia-feed path fo r au tomatic two-sided printi ng. Figure 1-30 Pickup, feed, and deliver y block di agram Pressure roller Fuser film Photosensitive drum Transfer roller Delivery roller MP tray pickup roller Cassette pickup roller Simplex media path Duplex media p ath MP tray separation pad Cassette separation pad ENWW Tray 1 or Tra y 2 39 NOT E: To find the follo wing com ponents, see Ph oto sens ors and switc hes on page 34. ? PS2; fus er de live ry se nsor. PS4; face-down tray med ia-full s ensor. PS215; Top -of-P age (TO P) sens or. PS225; m edia width sensor. PS502; dupl ex medi a-feed sens or (duple x model s only ). PS8008; pape r feeder media-fe ed sensor NOTE: PS8008 is used in Tray 3 and Tray 4. The prod uct detect s the followin g jams. Pickup de lay jam ? Pickup st ationar y jam. Delivery delay jam. Deliv ery sta tio nary j am. Fuser wr apping jam. Door open jam ? Residual me dia jam. Duplex r epickup jam (duplex models only) 40 Chapter 1 Theo ry of operatio n ENWW Tray driver PCA The fo llowing f igure shows th e signal s betw een the DC contr oller a nd the tr ay dri ver PCA.The fo llowin g figure shows th e pickup and f eed pa per path (Tray 3 shown ). Figure 1-32 Tray 3 an d Tray 4 pickup, feed, a nd del ivery b lock d iagram Optional paper feeder separation pad Optional paper feeder feed roller Optional paper feeder pickup roller 42 Chapter 1 Theo ry of operatio n ENWW PS451; paper feeder me dia-pres ence sens or detect s if media is pre sent in the tray. NOTE: PS451 is used in Tray 3 and Tray 4. ? Media si ze i s detecte d after th e page enters the produ ct. Jam detection ? PS8008; p aper feeder m edia-f eed s ensor de tects jam s i n the paper fe eder. ENWW Additional t ray 43 Removal an d replacem ent stra tegy. Servic e appr oach. Removal an d replacem ent proced ures ENWW 45 Occas ionally, notes and tip s are i ncluded t o prov ide direc tions for diff icult or critica l replac ement proc edure s. HP does not supp ort r epairing indi vidual subas semblie s or t rouble shooting to th e com ponent l evel. WARNING! Turn the pro duct off, wait 5 seconds, and the n remove the powe r cord before attemptin g to service the produc t. If this warning is not fo llowed, s evere inju ry can re sult, in additi on to dam age t o the pro duct. Th e power must b e on f or ce rtain fu nction al chec ks during t roublesh ooting. Howev er, disco nnect the pow er supply during pa rts remov al. The reflected bea m, althoug h invisib le, can damag e your eyes. The s heet-m etal par ts ca n have sharp edges. Be c areful when h andli ng sh eet-metal par ts. CAUTION: Do not bend or fold the flat fl exible c ables (FFCs) d uring remo val or in stallatio n. Also, do not st raight en prefold s in the FF Cs. You must fu lly seat a ll FFCs in the ir co nnectors. Fa ilure to ful ly seat an FFC into a conne ctor can caus e a shor t ci rcuit i n a PC A. Inco rrectly ro uted or lo ose wire ha rness es can inter fere with other inte rnal compo nents and can becom e dama ged or broken. Fr ayed or pinch ed harness wires ca n be difficu lt to find. When re placi ng wire harnes ses, alw ays use the prov ided wire lo ops, lan ce points, or wire-har ness guid es and re tainers. NOT E: To install a self-tappi ng screw, f irst turn it c ounterclockw ise to a lign it with the thread p attern, and then careful ly turn it clo ckwise to ti ghten. Do not o vertighten. I f a sel f-tapp ing scr ew-hole b ecomes stripp ed, repair the screw-ho le or repla ce the affect ed assem bly. Note the length, diam eter, col or, type, and loc ation of e ach sc rew. Be sur e to ret urn ea ch screw to its origin al loc ation du ring r eassemb ly. TIP: For clar ity, so me pho tos i n this c hapter mi ght s how compo nents remov ed that would n ot be remov ed to ser vice th e produc t. If ne cess ary, re move the comp onents liste d at th e beg inning of a proced ure befor e proc eeding to ser vice t he pr oduct. Elec trosta tic disc harge CAUTION: Some part s ar e sensiti ve to elec trostati c disch arge (E SD). Look for the E SD re minder when removing produ ct parts. Alw ays perf orm se rvice work at an ESD-pr otecte d worksta tion or m at, or use an ES D strap. If an ESD worksta tion, mat, or strap is not available, ground yo urself by touching the she et-met al chas sis bef ore touc hing an ESD- sensiti ve part. Protec t the ES D-sen sitive p arts by placing them in ES D pouches when they ar e out of th e pr oduct. Small fl at bl ade scr ewdri ver 46 Chapter 2 Removal and repl acement ENWW ESD mat ? Penli ght CAUTION: Alwa ys use a Phi llips s crewdr iver ( callout 1 ).