Engine test

The engine test is used to verify that the print engine is functioning correctly. The cable pod is bypassed during an engine test, so the engine test is useful for isolating printer problems. The engine test prints horizontal lines in the printable area of a page. This page is also useful for checking and adjusting registration. The engine test switch is below the cable pod connector assembly. To print an engine-test page, depress the engine-test button (callout 1). A single test page prints...

LED status lights

The status lights give the user information about the status of the printer. Until the cable pod initializes the firmware, only the ready and fatal-error light patterns can appear. If the cable pod is not connected when the printer power is turned on, the motor rotates (for about 6 seconds) but the status lights remain off (the firmware is not initialized). If the cable pod is connected while printer power is on, the printer turns off and then on, the motor rotates (for about 6 seconds) and the...

Laserscanner assembly

1 Remove the following assemblies Toner cartridge, media tray, and cable pod. See Toner cartridge on page 15 through Cable pod on page 17. Left side, back, right side, and top covers. See Left side cover on page 18 through Top cover on page 29. CAUTION Never operate the printer with the laser scanner assembly exposed. The reflected beam, although invisible, can damage your eyes. When servicing the printer, replace the top cover before operating the printer. 2 Disconnect the ribbon cable from...

Transfer roller

1 Remove the following assemblies Toner cartridge and media tray. See Toner cartridge on page 15 through Media tray on page 16. 2 Use needle-nose pliers to gently squeeze the two small tabs on the transfer roller. 3 Lift the transfer roller up, slide it to the right, and lift it out of the printer. Skin oils can damage the transfer roller sponge. Do not touch the black Figure 28. Remove the transfer roller Figure 28. Remove the transfer roller Do not misplace the small grounding spring that is...

ECU pan

1 Remove the following assemblies Toner cartridge, media tray, and cable pod. See Toner cartridge on page 15 through Cable pod on page 17. Left side, back, and right side covers. See Left side cover on page 18 through Right side cover on page 24. 2 Unplug the three spade connectors (callout 1). 3 Disconnect the motor cable connector (callout 2). 4 Unplug the fuser cable connector (callout 3) by pressing and releasing the clip on the back of the connector. 5 Unplug the remaining four wire...

Basic troubleshooting

A Does the printer turn 1 on successfully When the product is connected to a grounded power source, the printer motor should continuously rotate for about six seconds. Power is not being supplied to the printer. There are open wire harness connectors. There are pinched or frayed wire harness wires. 1. Verify that the product is plugged in. 2. Verify that the power cable is functional and the cable is plugged into the correct power source (110 V or 220 V ac). 3. Verify that FU102 (the ECU PCB...

Solving paperfeed problems

Use the following tables to solve problems related to moving print media or documents through the printer. Table 12. Solving paper-feed problems Table 12. Solving paper-feed problems Pages are coming out curled or wrinkled. Paper curl is inherent to the laser printing processes, and occurs when paper is subjected to heat. Paper curl tends to relax as the paper cools while resting on a flat surface. Make sure that the media meets specifications detailed in the Print Media Guide for the HP...

Solving imagequality problems

Use the following tables to help solve problems with printed pages. If the problem occurs when printing, see table 11, Solving print image-quality problems, on page 72. Also, see table 12, Solving paper-feed problems, on page 77. Solving print image-quality problems Table 11. Solving print image-quality problems Table 11. Solving print image-quality problems The printer is not plugged in. Make sure that the printer is plugged into a live wall outlet or power strip. The Ready light illuminates...