• Code: 66.80.73
• Display: 66.80.73
• Description: Flush request in checking paper path
• Remedy: Turn the product off, and then on.

• Code: 66.80.74
• Display: 66.80.74
• Description: Checking paper path start in PDLV
• Remedy: Turn the product off, and then on.

• Code: 66.80.75
• Display: 66.80.75
• Description: Flush request in flush
• Remedy: Turn the product off, and then on.

• Code: 66.80.76
• Display: 66.80.76
• Description: Non-flush complete
• Remedy: 1. Follow the instructions in online help. 2. Turn he product off and turn it on. 3. If the error continues

• Code: 66.90.10
• Display: 66.90.10
• Description: Booklet Interlock Switch Error There are three switches in the Booklet Maker finisher: SW1 (the saddle-guide switch also known as the inlet-door switch), SW3 (the booklet-ejection-door switch), and MS31 (the front-door switch). The Stapler/Stacker finisher only has one switch, MS31 for the front door of the finisher. All three switches detect if the associated door or guide plate is open or closed. Each one of the switches also has a sensor (SW1/PI9, SW3/PI3, and MS31/PI32) that acts as a backup and detects the same information as the switches. The error occurs when all the doors and guides are closed and there is a mismatch in readings between the sensors and the switches. For example, the front door finisher door is closed, PI32 senses the door is closed, but MS31 senses the door is still open Associated finisher door and guide switches and sensors are as follows: • Saddle-guide switch SW1 and saddle-guide sensor PI9 • Booklet-ejection-door switch SW3 and booklet-ejection-door sensor PI3 • Front-door switch MS31 and front-door sensor PI32
• Remedy: Control panel diagnostics: PI32 (front-door-1 sensor), PI3 (booklet door-1 sensor, also known as booklet-delivery-door sensor), PI9 (front-door-2 sensor, also known as the saddle-guide-door sensor or inlet-door sensor), SW3 (booklet-door 2). 1. Using the diagnostic tests from the product control panel, try to isolate which door or guide and sensor is causing the error. 2. Make sure that the sensors are securely fastened to the chassis. 3. Check the switches and sensors for damage and clean the sensors by gently blowing clean air into the sensor to remove dust and debris. 4. Check the wiring at the switches and sensors. 5. Check the tabs that activate the switches and sensors on the doors and guides for damage. Make sure that the tabs are aligned with the switches and sensors. Replace the doors and guides as necessary. 6. Make sure that the following connectors are fully seated and not damaged: • Stack controller PCA • J719 (MS31) • J707 (PI32) • Saddle-stitcher controller PCA • J4 (SW1) • J10 (PI9) • J4 (SW3) • J11 (PI3) 7. If the error persists, replace the PCA (stacker controller PCA or saddle-stitcher controller PCA) that is associated with the failed switch/sensor.

• Code: 66.90.29
• Display: 66.90.29
• Description: Booklet Staple Motor Error (Rear) The Booklet Maker stitch staplers do not move to different locations in relation to the paper like the main stapler. The only movement is through the movement of the rotary cam located on the stapler unit itself, during the actual stapling of the booklet. The stitch-home-position switch (SW5) is part of the rear-stitch stapler unit and senses the stapler opening and closing during stapling by the motion of the rotary drive cam. Like SW5, the stitch motor (M6) is also part of the overall stitch stapler unit and replacement requires the replacement of the saddle-stapler assembly. This error occurs when the rear booklet-maker-stapler stitching-home-position sensor (SW5) does not turn on when the stitch motor (rear) (M6) has driven forward for 0.5 seconds. This error also occurs when the rear booklet-maker-stapler stitching-home-position sensor (SW5) does not turn off when the stitch motor (rear) (M6) has driven forward for 0.5 seconds.
• Remedy: 1. Check the rear-stitch stapler for jammed staples. 2. Clear jammed staples, and then check the staple unit for damage. Retest the stapler. • If the error continues, check the following items: a. Make sure that HP-approved staples are used. b. Replace the staple cartridge with one containing HP-approved staples. c. If the error continues, replace the saddle-stapler assembly. • If the error persists, but no damage is found, proceed to the next step. 3. Make sure that connector J8 on the saddle-stitcher controller PCA is fully seated and not damaged. 4. Check the wiring at the rear-saddle-stitch stapler and the saddle-stapler assembly for damage and correct seating. 5. Check the connector that the saddle-stitch-stapler assembly engages inside the finisher for damage and foreign material, as well as for correct seating with the saddle-stitch-stapler assembly. 6. If the error persists, replace the saddle-stitcher controller PCA. 5.

• Code: 66.90.30
• Display: 66.90.30
• Description: Booklet Staple Motor Error (Front) The Booklet Maker stitch staplers do not move to different locations in relation to the paper like the main stapler. The only movement is through the movement of the rotary cam located on the stapler unit itself, during the actual stapling of the booklet. The stitch-home-position switch (SW7) is part of the front-stitch stapler unit and senses the stapler opening and closing during stapling by the motion of the rotary drive cam. Like SW7, the stitch motor (M7) is also part of the overall stitch stapler unit and replacement requires the replacement of the saddle-stapler assembly. This error occurs when the front booklet-maker-stapler stitching-home-position sensor (SW7) does not turn on when the stitch motor (front) (M7) has driven forward for 0.5 seconds. This error also occurs when the front booklet-maker-stapler stitching-home-position sensor (SW7) does not turn off when the stitch motor (front) (M7) has driven forward for 0.5 seconds.
• Remedy: 1. Check the front-stitch stapler for jammed staples. 2. Clear jammed staples, and then check the staple unit for damage. Retest the stapler. • If the error continues, check the following items: a. Make sure that HP-approved staples are used. b. Replace the staple cartridge with one containing HP-approved staples. c. If the error continues, replace the saddle-stapler assembly. • If the error persists, but no damage is found, proceed to the next step. 3. Make sure that connector J8 on the saddle-stitcher controller PCA is fully seated and not damaged. 4. Check the wiring at the front-saddle-stitch stapler and the saddle-stapler assembly for damage and correct seating. 5. Check the connector that the saddle-stitch-stapler assembly engages inside the finisher for damage and foreign material, as well as for correct seating with the saddle-stitch-stapler assembly. 6. If the error persists, replace the saddle-stitcher controller PCA.

• Code: 66.90.41
• Display: 66.90.41
• Description: Booklet Nip Motor Error The paper-fold motor (M2), which is located in the booklet making area of the finisher, drives the rotation of the folding rollers to create desired fold in the paper. The error occurs when the number of pulses by the paper-fold-motor clock sensor (PI4) is less than the expected standard value. This error also occurs when the status of the paper-fold home-position sensor (PI21) does not change when the paper-fold motor (M2) has driven for 3 seconds.
• Remedy: 1. Check the area around the folding rollers for a jam. 2. Test the paper-fold motor M2 using the finisher component test from the product control panel. • If the folding rollers rotate correctly, perform the following steps: a. Check sensor PI4 and sensor PI21 for damage. b. Make sure that the sensor flags are not damaged, move freely, and are correctly aligned with the PI48 and PI21 sensor bodies. c. Make sure that the sensors are securely fastened to the chassis. d. Carefully clean each sensor body with a clean, lint-free cloth, or gently blow clean air across each sensor to remove dust and debris. e. Make sure that connector J3 on the saddle-stitcher controller PCA is fully seated and not damaged. Check the wiring at the PI4 sensor. f. Make sure that connector J18 on the saddle-stitcher controller PCA is fully seated and not damaged. Check the wiring at the PI21 sensor. g. If the error persists, replace sensor PI4 or PI21. h. If the error persists, replace the saddle-stitcher controller PCA. • If the folding rollers do not rotate correctly, perform the following steps: a. Check the folding-roller gears and connecting gears between the paper-fold motor M2 and the folding rollers for damage. Replace components as necessary. b. Check the folding rollers for wear and damage. Replace components as necessary. c. If the error persists, replace the motor-mount assembly. NOTE: The motor-mount assembly includes the paper-fold motor M2 and the paperfold motor-clock sensor PI4. d. If the error persists, replace the saddle-stitcher controller PCA.