• Code: 66.12.15
• Display: 66.12.15
• Description: Finisher stapling or offsetting rear aligning plate motor failure (M34) In order to neatly align the paper stack for either stapling or offsetting to take place, the front and rear aligning plates move to align each sheet when it enters the processing tray. The error occurs when the aligning plate either does not leave or when it does not return to the aligning-plate-rear-homeposition sensor (PI37) when the alignment plate rear motor (M34) has been driven for 4 seconds.
• Remedy: Control panel diagnostics: none 1. Verify that Offsetting is turned On in the Device Behavior menu. 2. Verify that connector J722 on the stacker controller PCA is fully seated and not damaged. Also check the wiring at sensor PI37 and motor M34. 3. Replace the operation-tray assembly (processing tray). 4. Only if the error persists and the previous steps fail to correct the problem, replace the stacker controller PCA.

• Code: 66.12.16
• Display: 66.12.16
• Description: Finisher error - speed change motor (M40) The speed change motor M40 and sensor PI49 associated with this error have been removed from the output device prior to introduction to the field. This error message should never be seen in the field.
• Remedy: If error message appears, contact HP Support and report the error. HP Support: Report error to Technical Marketing.

• Code: 66.12.21
• Display: 66.12.21
• Description: Finisher upper-stapler-motor failure (M41) Error occurs either when the stapler does not leave stapler home position (PI50) after staple motor (M41) is driven for 0.4 seconds or when it does not return to stapler home position after the staple motor has detected a motor lock condition and the motor is driven backwards for 0.4 seconds, attempting to reach home position. NOTE: PI50 and M41 are located on the stapler assembly and can only be replaced by replacing entire stapler assembly. M41 (staple motor) drives the insertion and crimping of the staple only (not location of the staple on paper). PI50 senses the home position of the stapler as it is inserting and crimping a staple only (not location of the staple on the paper). The stapler-safety switch (MS34) that assures that stapler motor (M41) is disabled when it senses a finger may be in the stapler.
• Remedy: Control panel diagnostics: none 1. Check the stapler unit for jammed staples. 2. Check the stapler unit for loose staples and paper dust. 3. Make sure that the stapler unit is fully seated. 4. Verify that connector J717 on the stacker controller PCA is fully seated and not damaged. Check the wiring at the stapler unit and the stapler PCA. 5. Replace the stapler.

• Code: 66.12.22
• Display: 66.12.22
• Description: Finisher upper stapler shift motor failure (M35) Error occurs when the stapler does not leave the stapler-shift home-position sensor (PI40) after the stapler-shift motor (M35) has driven for 5 seconds. Also occurs when the stapler fails to return to the stapler-shift home-position sensor (PI40) after the stapler-shift motor (M35) has been driven for 20 seconds.
• Remedy: Control panel diagnostics: M35 staple motor (stapler-shift motor) and PI140 stapler home sensor (stapler home-position sensor) 1. Test the upper-stapler-shift motor M35 by using the finisher component test from the control-panel display. • If the stapler unit moves properly, proceed to the next step in this section. • If the stapler unit does not move properly or moves erratically, perform the following steps:• Check the flat-flexible cable (FFC) for damage (dents, folds, and/or tears). Replace the FFC if necessary.• Check the FFC connectors and cable mounting areas.• If the error persists, replace the stapler assembly 2. Test the stapler-shift home position sensor PI40 by using the finisher component test from the control-panel display. • If the sensor does not change state when the stapler unit is moved from the home position, perform the following steps: • Make sure that the sensor is securely fastened to the chassis. • Carefully clean the sensor body by gently blowing clean air across the sensor to remove dust and debris. • Verify that connector J1040 on the stacker controller PCA is fully seated and not damaged. Check the wiring at the sensor. • If the error persists, replace the stapler assembly. NOTE: The stapler assembly includes the stapler-shift home position sensor PI40, stapler unit, shift-position-plate assembly, and the flat-flexible cable (FFC).

• Code: 66.12.23
• Display: 66.12.23
• Description: Finisher upper-stapler failure Occurs when stapler alignment interference sensor (PI46) is activated, signaling that the stapler unit is not in its proper position for stapling to occur. This is to prevent damage to stapler from occurring when stapler is positioned over one of the three stoppers when the signal to staple has been sent.
• Remedy: Control-panel diagnostics: none 1. If the stapler unit does not move properly or moves erratically, check the flat-flexible cable (FFC) for damage (dents, folds, and/or tears). Replace the FFC if necessary. 2. If the stacker controller PCA was recently replaced, use the steps in this manual to adjust the staple alignment and staple position. 3. If the stapler is not positioned over a stopper when this error occurs, perform the following steps. • Make sure that the stapler unit is correctly mounted and securely fastened to the base. • Make sure that the sensor is not obstructed or damaged. Verify that the sensor flag is not damaged, moves freely, and is correctly aligned with the sensor body. • If the error persists, replace the stapler subassembly. NOTE: The stapler subassembly includes the stapler unit and base

• Code: 66.12.31
• Display: 66.12.31
• Description: Finisher error - 1st tray lift/lower motor (M37) Occurs when the output bin 1 does not activate the home-position sensor (PI41) when the output-bin-1 shift motor (M37) is driven for 20 seconds. Also occurs when output bin 1 does not move when output-bin-1 shift motor (M37) is driven for 4 seconds. Also occurs when output-bin-1 switch (MSW33) is activated while output bin 1 is operating. NOTE: Output-bin-1 home position is detected using the top sheet of paper on the bin when paper is present and the edge of the bin itself when there is no paper on the bin.
• Remedy: Control panel diagnostics: M37 tray 1 (output bin 1 motor) NOTE: M37 moves both output bin 1 and the upper-output bin that is attached to output bin 1 on the stapler/stacker finisher, but only output bin 1 on the booklet-maker finisher. 1. Manually release output bin 1, and position it at the mid point of its travel area. Test the output-bin-1 shift motor M37 by using the finisher component test from the control-panel display. • If output bin 1 moves during the test, perform the following steps. • If the paper-surface sensor flag was recently removed or replaced, make sure that it is installed correctly. NOTE: The four tabs under the clips must be inserted into the slots behind the roller shaft of the lower-stack ejection roller. • Verify that the paper-surface sensor flag is not damaged, moves freely, and is correctly aligned with the PI41 sensor body. Also verify that when the top edge of the output bin engages the sensor arm that the sensor flag moves into sensor PI41. • Make sure that the sensor is securely fastened to the chassis. • Carefully clean the sensor body by gently blowing clean air across the sensor to remove dust and debris. • Verify that intermediate connector J1040 and J721 on the stacker controller PCA are fully seated and not damaged. Check the wiring at the sensor. • If the error persist, replace sensor PI41. • If the error persist, replace the output-bin-1 assembly. NOTE: The output-bin-1 assembly includes the output-bin-1 shift motor (M37), output-bin-1 switch (MSW33), output-bin-1 area sensors, and the output-bin-1 driver PCA. 2. If output bin 1 does not move during the test, perform the following steps. • Check the output-bin tracks for damage. • Replace the output-bin-1 assembly NOTE: The output-bin-1 assembly includes the output-bin-1 shift motor (M37), output-bin-1 switch (MSW33), output-bin-1 area sensors, and the output-bin-1 driver PCA. • Only if the error persists and the previous steps fail to correct the problem, replace the stacker controller PCA.

• Code: 66.12.32
• Display: 66.12.32
• Description: Finisher error: second-tray-lift/lower motor (M38) Occurs when the output bin 2 does not activate the home-position sensor (PI48) when the output-bin-1 shift motor (M38) is driven for 20 seconds. Also occurs when output bin 2 does not move when output-bin-1 shift motor (M38) is driven for 4 seconds. Also occurs when bin-2 upper limit is detected by PS983, PS982, PS981 on the Tray-2 shift PCA when no paper has been sensed by the output-bin-2 paper sensor (PI43). NOTE: Output-bin-2 home position is detected using the top sheet of paper on the bin when paper is present and the edge of the bin itself when there is no paper on the bin.
• Remedy: Control-panel diagnostics: M38 (output-bin-2 motor) and PI48 output-bin-2-paper-surface sensor 1. Manually release output bin 2, and position it at the mid point of its travel area. Test the output-bin-2 shift motor M38 by using the finisher component test from the control-panel display. • If output bin 2 moves during the test, perform the following steps. • Verify that the paper-surface sensor flag is not damaged, moves freely, and is correctly aligned with the PI48 sensor body. Also verify that when the top edge of the output bin engages the sensor arm that the sensor flag moves into sensor PI41. • Make sure that the sensor is securely fastened to the chassis. • Carefully clean by gently blowing clean air across the sensor to remove dust and debris. • Verify that intermediate connector J1040 and J721 on the stacker controller PCA are fully seated and not damaged. Check the wiring at the sensor. • If the error persist, replace sensor PI48. • If the error persist, replace the output-bin-2 assembly. NOTE: The output-bin-2 assembly includes the output-bin-2 shift motor (M38), output-bin-2 area sensors, and the output-bin-2 driver PCA. 2. If output bin 2 does not move during the test, perform the following steps. • Check the output-bin tracks for damage. • Replace the output-bin-2 assembly. NOTE: The output-bin-2 assembly includes the output-bin-2 shift motor (M38), output-bin-2 area sensors, and the output-bin-2 driver PCA. • Only if the error persists and the previous steps fail to correct the problem, replace the stacker controller PCA.

• Code: 66.12.41
• Display: 66.12.41
• Description: Finisher: folding-paper-positioning-plate motor (M4) The paper-positioning-plate motor (M4), located in the booklet-making area of the finisher, controls the up and down positioning of the stacked paper for stitch stapling and for folding. An error occurs when the paper-positioningplate home-position sensor (PI7) does not turn on when the paper-positioning-plate motor (M4) has been driven for 1500 pulses. Also occurs when the paper-positioning-plate home-position sensor (PI7) does not turn off when the paper-positioning-plate motor (M4) has been driven for 300 pulses.
• Remedy: Control-panel diagnostics: M4-guide-plate motor (paper-positioning-plate motor) 1. Test the paper-position-plate motor M4 by using the finisher component test from the control-panel display. During the test, observe the movement of the booklet-maker-guide plate, and make sure it is not obstructed or damaged. 2. Remove the booklet-maker output bin to gain access to the paper-position-plate home-position sensor PI7 and delivery door. Remove the plate that holds PI7, and carefully clean the sensor body by gently blowing clean air across the sensor to remove dust and debris. 3. Make sure that the sensor is securely fastened to the plate. 4. Check the wiring at the sensor. 5. If the error persists, replace sensor PI7 and the positioning-plate assembly together. 6. Only if the error persists and the previous steps fail to correct the problem, replace the stacker controller PCA.