Printer Repair

MAY 2005, VOL. 14, NUMBER 4

LEARN PRINTER REPAIR

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HP LASERJ LASERJET ET 42 4200 00/4 /430 300 0 TRAIN TRAINING ING COU COURS RSE E RELEA RELEASED SED

INSIDE INS IDE THI THIS S ISS ISSUE UE • Cleaning Hewlett-Packard’s Digital Copy Accessory • Part Spotligh Spotlight: t: HP LaserJe LaserJett 2200 Maintena Maintenance nce Kit • Tech Tip Tip:: HP Color LaserJe LaserJett 3500/35 3500/3550/3700 50/3700:: A New Concep Conceptt in Laser/S Laser/Scanners canners

COMPANY

HP LASERJET 4200/4300 ONLINE TRAINING COURSE RELEASED The list of Parts Parts Now! Online Training Training courses—which courses—which includes includes the HP LaserJet 4000/4050/4100 4000/4050/4100 and and the HP LaserJet 5Si/8000/8100/8150—continues to grow with the announcement announcement of the new HP LaserJet 4200/4300 4200/4300 course! Online Training from Parts Now! is the same quality instruction that our Director of Training Steve Geishirt gives in his hands-on classes, but from the comfort of your computer. There's no risk in trying out online training, because our intro course doesn't cost anything! You

Ready to take advantage of your free trial? Then visit http://videotraining.partsnow.com and click on the 'Free Trial' link. You'll also find more information, including pricing and course descriptions. If you have any questions, don't hesitate to call your account representative at (800) 886-6688 or email us at [email protected] [email protected].. s

SALES SPOTLIGHT: TIM RITSCHAR ITSCHARD D

TR:

Tim, a Parts Now! account representative

solving problems that they have.

for five and a half years, sat down with

ST : Why should your customers buy printer parts from you?

Service Today to talk about his sales phi-

TR:

losophy, losophy, what Parts Now! has to offer, and

working account rep who is always going to do his best for

why he could never star in an infomercial.

them. They are going to get a fair shake on price and great ser-

Definitely building relationships with customers, being

able to talk to them to see how their businesses are run and

My customers know they are getting a reliable and hard-

Service Today: What makes working at Parts Now! unique?

vice. They know they can utilize our online website and our

Tim Ritschard:

tech support, which I’ve got a lot of compliments on. Some

We’re working in a niche market with the

laser printer parts industry. I’m able to have a direct impact on

techs run into issues they’ve never run into before, and our

what happens with our customers, and in turn what they can

tech support has, so they can help them out.

provide for their customers. When they have success, we have

ST : Outside of work, what is something that most people don’t

success, so I’m a firm believer in making my customer’s life

know about you?

as easy as possible.

TR:

ST : What is your sales philosophy?

the Grand Canyon. We have a Boxer. I also enjoy playing bas-

TR:

I’m not one of those “it slices, it dices” salespeople that

ketball and golf, and I must like running since I’ve run several

will sell you something you don’t need. I want to make sure

marathons (editor’s note – Tim is being humble, as he finished 

my customers need and can use what I’m selling.

his first marathon in an impressive three hours and eighteen

ST : What is your favorite part of coming to work every day?

2

can take the first section of our basic course,  Image Formation Formation for for HP Printers Printers, for free. If you like that, we'll let you take the other four sections for free also—all you have to do is contact your account representative. We’ll take it from there!

I guess some people don’t know that my wife and I hiked

minutes).

PRODUCT PART SPOTLIGHT: HP LASER LASERJE JET T 2200 M AIN TENAN ENA N CE KIT If you’re repairing printers, you have to have the ability to adapt with this ever-changing industry. New models seem to be introduced monthly, increasing the amount of knowledge you need  just to survive. Sometimes even simple things like the contents of maintenance kits change—something that recently happened with the HP LaserJet 2200 maintenance kit (part number H397860001). This kit, whose new contents are shown in Figure 1, has always included a tray 1 pickup roller and separation pad. In addition, it has historically included two pickup rollers and two separation pads intended for tray 2, as well as optional tray tray 3. However, However, HP is now including only one roller and one separation pad, meant for tray 2. Fortunately, most of the time you will not have to replace the roller and pad in both tray 2 and tray 3. First of all, not all LJ 2200 printers will have optional tray 3, and for those that do, it is unlikely that tray 2 and 3 are used equally. For the tray that is used least often, you can simply replace the pickup roller (part number RB2-6304) and the separation pad (RB2-6349) if the tray has problems

Figure 1 - The contents of the HP LaserJet 2200 maintenance kit (H397860001): • Fusing Assembly, Assembly, RG5-5559 • Transfer Roller Assembly Assembly,, RG5-5581 • Tray 1 Pickup Roller, Roller, RB2-2900 • Tray 1 Separation Pad, RF5-3272

HEADQUARTERS:

• Tray 2 Pickup Roller, Roller, RB2-6304

3517 W. Beltline Hwy.

• Tray 2 Separation Pad, RB2-6349

Madison, WI 53713 (608) 276-8688 (800) 886-6688

picking up paper. The moral of the story? Don’t get caught off guard when ordering this popular maintenance kit. Make sure you have some extra pickup rollers and separation pads on hand, in case you need to replace them in both trays. You might  just save yourself another trip to your customer! s

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CLEANING HEWLETT-PACKARD’S DIGITAL COPY ACCESSORY New questions continue to arise concerning print quality issues with HP’s digital copy accessory for their LaserJet 8100 series of printers. Many printer technicians get a little nervous about servicing this unit because they are used to servicing printers and not what they are calling “copy machines.” First of all, this is not a “copy machine.” It is, however, a “copy attachment accessory,” and their nervousness is somewhat justified. However, with a little knowledge and thought—and the service manual—there truly is nothing to be nervous about.

A Clean Mirror Leads to Clean Copies One of the biggest problems that we have seen to date isn’t component failure, but is simply the cleaning of these units and their mirrors. An example of  this problem was with the first one I had to deal with. I took it apart and cleaned everything, including the mirrors, but it still produced poor copy quality. Upon further examination and disassembly, I realized that not only had I missed a mirror, but also didn’t clean the lens that was full of dust. This was easy to Figure 1 overlook, which com-

pelled me to write this article about the disassembly and cleaning of these items—an article that will hopefully save you time when dealing with this unit. We will also talk about the do’s and don’ts with disassembling this unit, which should not be attempted without the service manual. First, we must understand how important having clean mirrors and lenses is. If the mirrors are dust covered, the machine may transfer dust particles that have accumulated on the various mirrors to the paper, resulting in a grey background or spots of grey on the copies. This image defect can be avoided by cleaning the mirrors, but be careful, as the mirrors are not available for purchase. If you happen to break one during disassembly, the whole upper or lower optical units would have to be replaced—and these units are not inexpensive!

Disassembly Tips As important as knowing what to do during disassembly is what not to do during disassembly. It is extremely important to use caution while removing and then reinstalling mirrors, as they are mounted and aimed specifically at the lens that focuses light into the CCD (charge coupled device). The CCD analyzes the light and converts it into electrical impulses, and should not be removed (Figure 1). Another thing to look look out for is the PCA (printed circirFigure 2 cuit assembly), which is mounted on the optical unit with concentric cams that are set at the factory. If it is removed, it will be virtually impossible to realign. Instead, clean the lens behind the PCA with a cotton swab. This This is a good rule to follow in general: if you can clean a mirror with a cotton swab instead of removing it, the swab is always preferred. Only remove the necessary mirrors—two of them will have to be removed to access the others. Prior to removing any of the mirrors, make note of any bevels cut along the edges that any of the mirrors may have. These bevels are there to allow the mirrors to fit correctly. The last item to be removed is the focusing frame (Figure 2), which is adjustable—so mark its placement before removing it. Figure 3

Disassembly Procedure The following is step-by-step instructions for disassembling the copy module. It is recommended that the unit be removed from its home to a more suitable location for disassembly, such as the repair shop. 1. Remove the top flatbed flatbed lid by removing removing one screw (red arrow, Figure 3) and sliding it to the right, out of the holddown pins (blue arrow). 2. Remove the upper ADF cover by removing removing one screw from the latch button, and two mount screws (Figure 4). 3. Remove the control control panel by removing removing two screws screws from the bottom (Figure 5a).

Figure 4

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4. Lift the control control panel panel up and and disconnect disconnect the cable (Figure 5b). 5. Remove the top cover by by removing removing the the following: following: a. Three screws and and one cable holder holder under under the the control control panel (Figure 6). b. Two screws under under the ADF cover on the left side of  the unit. c. Two screws screws on on the right right side. side. d. Lift off the top top cover cover.. 6. Remove the ADF (automatic document feeder) by following these steps:

Figure 5a

a. Remove two screws screws in the rear (Figure 7a) and partially pull out the main board. b. With the board partially removed, removed, disconnect disconnect the ADF cables (figure 7b) and then remove the board with its cage. c. Remove four screws screws in the front and rear of the ADF (Figure 7c) and lift off. 7. Remove the front side or lower lower scanner scanner glass assembly by removing two remaining screws on the right side (Figure 8), then lift off the glass with the metal frame. 8. Remove the lower optical unit unit by following following these these steps:

Figure 5b

a. Remo Remove ve one one screw on the right side of  the metal guide rod and slide out from the left side to remove. b. Lift Lift low lower er optical unit up from the front and slide drive belt out of  holder, then slide optical

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Figure 6

Figure 7a

unit out of rear guide. c. Disconne Disconnect ct ribbon ribbon cable. cable. 9. Remove Remove the the lower lower lamp assem assembly bly from the optical unit. Do not touch it with your fingers. If the lamp has been touched, clean it with alcohol.

Figure 7b

10. There are five mirrors. Only remove the necessary mirrors. To remove, gently pry each retaining clip at its lock tab to release. 11. Clean the projection lens and each mirror with a cotton swab and a suitable glass cleaner. Reinstall in reverse order. 12. Prior to installing the optical unit back into the base, lubricate the shaft and rear guide with light oil, making sure not to over-lube.

Figure 7c

Once the lower optical unit is reassembled and replaced, turn your attention to the ADF and the backside, or top optical unit. The following is a list of  steps to separate the ADF and the top optical unit. 1. Remove Remove the the screw screw and brack bracket et on the front side of the optical unit (Figure 9a). 2. Disconn Disconnect ect two cable cabless to the optioptical unit (Figure 9b).

Customer quote of the month: “ I am very pleased  pleased  with wit h the quality quality of  service that Michael  Davidsaver delivers to  my comp any any.. He  always treats me as if  I am the only cus-  t omer he has. has. Even  though I work for a  very small company, I  am never made to  feel inferior or like I  am wast wast ing his time  t ime  when I place an order. He’s friendly, courte-  ous,, knowledgeable  ous know ledgeable  and quick to respond  to my needs. These  attributes, coupled  with the great tech  support I receive are  what has kept me  coming bac b ack k t ime and  t ime again.”  again.”  - St St eve Martin  Mart in  Columbus,, O H  Columbus

3. Pivot Pivot the optical optical unit unit on the the hinges hinges (Figure 9c) and remove.

Figure 8

4. Once the the optical optical unit unit is remov removed, ed, turn over and remove lamp by

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Figure 9a

Figure 9b

Figure 9c

removing two screws and disconnecting one cable. Do not touch the lamp itself. If the lamp has been touched, clean it with alcohol. 5. There are are five mirrors. Only remove remove the the necesnecessary mirrors. To remove, gently pry each retaining clip at its lock tab to release. 6. Clean the the projection projection lens lens and each mirror mirror with with a cotton swab and a suitable glass cleaner. Reinstall in reverse order. Following reassembly, the unit must be calibrated with a target calibration sheet (part number PA03002C261FJ). If this item is not available, it can be made. It is basically an A3 size sheet of white paper with a .4 inch (10mm) black border around the edge. A3 size is 16.5 inches by 11.7 inches (420mm x 297mm). The calibrations that must be done are in the “Service

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Mode” of the unit, which can be accessed by holding down the “Reset,” “1,” and “0” keys while turning the copy module on. Release the keys when the first check comes up on the display. The “Offset Adjustment Calibration” should be performed using the target calibration sheet on all three scanners: flatbed, ADF front and ADF rear. Then the “Density Calibration” should also be performed on all three using the target calibration sheet. If the PCA boards were not not removed and the unit unit displays an “Optical error” after reassembly, check to see if the lamps—upper or lower—are lighting. If the applicable lamp lights and then the error displays, it means that the CCD does not see the light. Unless the CCD PCA is bad—which would would be rare—one of the mirrors is out of position. Recheck the mirror installation. A bad CCD PCA would require require replacement replacement of  the applicable optical unit. Maintaining the copy attachment can be tricky, but nonetheless important. Do you clean your eyeglasses when they are dirty? Yes you do! So, if the copy attachment can’t see documents very well when its glasses are dirty, they need to be cleaned as well. If  the precautions are used as mentioned, this maintenance can be done without a problem. s —Bill Voelker  Mr.  Mr. Voelker Voelker has been a Parts Now! trainer for over five  years,  years, training training both Parts Now! customers customers and internal internal staff on the latest in printer repair techniques and technologies.

TECH TIP OF THE MONTH HP COLOR LASERJET 3500/3550/3700: A NEW CONCEPT IN LASER/SCANNERS All laser printers use the same general method of putting print on the page: after a photo-sensitive drum is uniformly charged with high voltage, portions of the charge on the drum’s surface are altered by a laser beam. Toner is deposited on the altered areas, and a transfer element pulls the toner off the drum and onto the paper. Finally, the paper goes through a fuser or fixing unit, which uses a combination of heat and pressure to fuse the toner to the paper. This process is fairly straightforward in a monochrome printer. In a color printer, it gets more complicated since there are four colors of toner—typically black, cyan, magenta, and yellow. This allows for several variations in the basic process, two of  which HP has used in most of their their color laser printers: printers:  Method 1 – The Toner Carousel: There are four toner cartridges, but only one PC drum, which is separate from the cartridges, as well as one laser/scanner. The four cartridges are mounted in a carousel, which rotates them past the single drum, one at a time. This method is used in the CLJ 4500/4550, 8500/8550, and 1500/2500/2550 printers. The disadvantage of this method, aside from mechanical complexity, is that there are basically four print cycles for each printed page, as the drum has to go through a complete cycle for each of the four colors. This slows down the printing process and shortens the life of the drum.  Method 2 – In-Line Printing: In this method, each toner cartridge has its own built-in drum, similar to most monochrome printers. The cartridges are mounted in-line—all in a row— instead of in a carousel, and the paper moves past each cartridge in one pass. This is faster and mechanically simpler, but has the disadvantage that four separate laser/scanners are needed. This system is used in the CLJ 4600/4650, 5500/5550, and 9500 printer models. CLJ CLJ 3500 3500 LASER SCANNER CANNER, continued continued on page 10

Figure 1 - Rear view of laser/scanner unit with cover removed.

Figure 2 - Close-up of one half of laser/scanner unit showing paths of laser beams (red arrows).

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CLJ CLJ 3500 3500 LASERSCANNE ERSCANNER R, continued continued from page 9

The CLJ 3500/3550/3700 models basically use Method 2, but you will look in vain for the four laser/scanners. In these models, there is only one laser/scanner unit (part number RM1-1480), but if you look inside of it, you will see that it’s almost four scanners in one. Though it has four laser diodes and four sets of  optics, in some ways it is simpler—as it has only two motors (Figures 1 and 2).

Jason Jensen VP of Marketing & Strategy 

Matt Barnum Editor 

Steve Geishirt Dennis Kost Kost erman Bill Voelker Contributing Writers  SERVICE TODAY  is a Parts Now! publication publication wit h a miss mission t o serve as a technical resource for printer repair repair technicians. Please direct all correspondence concerning content, submissions, or circulation circulation of Service Today or Today  or any comments comments t o mbarnum@part mbarnum@ part snow.com.

 ©2005  ©200 5 Parts Parts Now! LL LLC C

The same square rotating mirror simultaneously scans two different laser beams through two different sets of optics. The optics further route the beams to the appropriate toner cartridges. The same process happens in the other half of the scanner unit, so you still get four laser beams—one for each color—but it’s done more economically. The practical application of all this is that when you get a 41 or 51 error in one of these printers, you no longer have to worry about which laser/scanner is bad. You simply replace the laser/scanner unit—just like in the old monochrome printers—and all possibilities are covered. Replacement and alignment of the laser/scanner is also much simpler, and if you’ve ever worked on a CLJ 4600 or 5500, you know that the same procedure on those printers was anything but simple! This laser/scanner unit is more complex than any single scanner from the 4600 or 5500, but the advantages of combining the four scanners into one package are worth it. —Denny Kosterman

The following students successfully completed courses in April: Glenn Good

Scott Hays

Heather Hudson

Jim Stinebaugh

HP LJ 400 4000/4 0/4050 050/41 /4100 00 HP LJ 42xx/4 42xx/43xx 3xx

HP LJ 5Si/80 5Si/8000/ 00/81x 81xx x HP LJ 400 4000/4 0/4050 050/41 /4100 00 HP LJ 42xx/4 42xx/43xx 3xx HP CLJ 460 4600/5 0/5500 500

HP LJ 5Si/80 5Si/8000/ 00/81x 81xx x HP LJ 400 4000/4 0/4050 050/41 /4100 00 HP LJ 42xx/4 42xx/43xx 3xx HP CLJ 460 4600/5 0/5500 500

HP LJ 5Si/80 5Si/8000/ 00/81x 81xx x HP LJ 400 4000/4 0/4050 050/41 /4100 00 HP LJ 42xx/4 42xx/43xx 3xx HP CLJ 460 4600/5 0/5500 500

The following students students successfully completed courses in April: Imag Image e Form Format atio ion n for for HP Prin Printe ters rs Joel Bernabe Alex Carstens Michael Clark Rolita Galyen

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Rick Holm Jeff Redding Ron Rickett

H P LJ 4000/4050/4100

H P LJ 5Si/8000/81xx

Pete Morgan

Travis Lansdowne

SALES STAFF MANAGEMENT

A CCOUN T REPRESENTATIVES

Thad Bainbridge

Bill Bohne

Jim Breedlove

Noah Canas

Dan Cassidy

Alex Colton

Doug Damon

Michael Davidsaver

Tom DePrey

Roy Divine

Ext. 1269

Ext. 1223

Ext. 1179

Ext. 1302

Ext. 1113

Ext. 1257

Ext. 1140

Ext. 1272

Ext. 1256

Ext. 1166

Jay Spaanem Presiden Presidentt & CEO CEO

James Evans

John Feldman

Barney Gugel

Darrel Hayner

Brad Janusiak

Christopher Kearney

Tim Kohl

Julie Krauth

Joe Lalley

Aaron Le Hew

Ext. 1262

Ext. 1237

Ext. 1180

Ext. 1304

Ext. 1248

Ext. 1105

Ext. 1117

Ext. 1122

Ext. 1162

Ext. 1173

Kevin D. Guy VP of Sales and Marketing

Rick Maharajh

Dave Martin

Brent Brent Molldrem

Randy Motl

Larry Riedl

Tim Ritschard

Leo Rodriguez

Kyle Rudolph

Randy Rueth

Fabian Ruiz

Ext. 1309

Ext. 1322

Ext. 1268

Ext. 1116

Ext. 1288

Ext. 1147

Ext. 1315

Ext. 1170

Ext. 1130

Ext. 1314

Wayne Tougas Director-Southeast Branch Andy Schuth

Paul Seibold

Matt Sickler

Terry Sippl e

Mike Tilley

Ken Wagner

Dan Wilson

Ext. 1236

Ext. 1145

Ext. 1218

Ext. 1305

Ext. 1142

Ext. 1134

Ext. 1127

CUSTOM ER DEV DEVELOPM ELOPM EN ENT T REPRESEN ENT TATIVES

Donna Banfield

Virgil Grenia

Vito Griseta, Jr.

Jason Kilgore

Colleen Longseth

Robert Sipple

Sarah Yahn

Ext. 1158

Ext. 1182

Ext. 1290

Ext. 1245

Ext. 1149

Ext. 1178

Ext. 1292

Michael Cox Strat egic Accounts Manager

CUSTOM ER SERVI CE CUSTOM ER SERVICE

MANAGER

Lori Porterfield

Clarissa Georgeson

Vito Griseta III

Heidi Satterthwaite

Chee Thao

Dawn Vanderhoof

Candice Young

Ext. 1129

Ext. 1165

Ext. 1259

Ext. 1283

Ext. 1227

Ext. 1118

Ext. 1188

Clark Wilson Sales Manager

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