HP LaserJet Enterprise 500 Maintenance Manual - Page 129

Belt, Platen Open

Page 129 highlights

Belt, Platen Open Caution Belt, Platen Open Removal 1. Prepare the printer for maintenance (page 100). 2. Cabinet Models: Remove the paper path (page 161). Pedestal Models: Remove the top cover assembly (page 142). 3. Remove the platen open belt cover by squeezing the top and bottom to release the plastic tabs from the slots in the side plate (page 206, item 24). 4. Loosen (do not remove) the two 5/16 inch mounting screws of the platen open motor (page 208, item 15). 5. Push the motor toward the front of the printer to loosen the platen open belt. 6. Loosen the 1/16 inch setscrew in the platen open motor pulley and remove the pulley. (See page 208, item 6.) 7. Remove the platen open belt by sliding the belt off the platen open pulley. Installation 1. Slide the platen open timing belt over the platen open pulley and the motor pulley. 2. Slide the motor pulley onto the platen open motor shaft and tighten the 1/ 16 inch pulley setscrew. 3. Finger tighten the two 5/16 inch screws securing the platen open motor. Too much tension on the platen open belt can cause the platen gap to change, which can lead to premature wear of the platen, damaged hammer tips, and poor print quality. 4. While pulling the platen open motor toward the rear, adjust the belt tension to 1/8 inch deflection midway between the pulleys. tighten the upper motor mount screw with a 5/16 inch nutdriver. Tighten the lower 5/ 16 inch with an open end wrench. Check the deflection of the platen open belt again after the mount screws are tight. 5. Snap the platen open belt cover into the slots in the side plate. 6. Cabinet Models: Install the paper path (page 161). Pedestal Models: Install the top cover assembly (page 142). 7. Return the printer to normal operation (page 101). 129

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Belt, Platen Open
129
Belt, Platen Open
Removal
1.
Prepare the printer for maintenance (page 100).
2.
Cabinet Models: Remove the paper path (page 161).
Pedestal Models: Remove the top cover assembly (page 142).
3.
Remove the platen open belt cover by squeezing the top and bottom to
release the plastic tabs from the slots in the side plate (page 206, item
24).
4.
Loosen (do not remove) the two 5/16 inch mounting screws of the platen
open motor (page 208, item 15).
5.
Push the motor toward the front of the printer to loosen the platen open
belt.
6.
Loosen the 1/16 inch setscrew in the platen open motor pulley and
remove the pulley. (See page 208, item 6.)
7.
Remove the platen open belt by sliding the belt off the platen open pulley.
Installation
1.
Slide the platen open timing belt over the platen open pulley and the
motor pulley.
2.
Slide the motor pulley onto the platen open motor shaft and tighten the 1/
16 inch pulley setscrew.
3.
Finger tighten the two 5/16 inch screws securing the platen open motor.
4.
While pulling the platen open motor toward the rear, adjust the belt
tension to 1/8 inch deflection midway between the pulleys. tighten the
upper motor mount screw with a 5/16 inch nutdriver. Tighten the lower 5/
16 inch with an open end wrench. Check the deflection of the platen open
belt again after the mount screws are tight.
5.
Snap the platen open belt cover into the slots in the side plate.
6.
Cabinet Models: Install the paper path (page 161).
Pedestal Models: Install the top cover assembly (page 142).
7.
Return the printer to normal operation (page 101).
Too much tension on the platen open belt can cause the platen gap to
change, which can lead to premature wear of the platen, damaged
hammer tips, and poor print quality.
Caution