HP LaserJet Enterprise 500 Maintenance Manual - Page 139

Cover Assembly, Hammer Bank / Ribbon Mask

Page 139 highlights

Cover Assembly, Hammer Bank / Ribbon Mask Note Cover Assembly, Hammer Bank / Ribbon Mask Removal 1. Prepare the printer for maintenance (page 100). 2. Remove the shuttle frame assembly (page 177). 3. Using a Torx T-10 driver, remove the six screws and three ribbon mask clamp plates securing the ribbon mask to the hammer bank cover. Remove the ribbon mask. (See Figure 20.) If you are replacing just the ribbon mask, simply loosen the six screws until you can slip the ribbon mask off the alignment pins. 4. Using a Torx T-10 driver, remove the 12 screws securing the hammer bank cover to the hammer bank. Remove the hammer bank cover. (See Figure 20.) Installation Caution The hammer bank contains a strong magnet. To prevent damage to the hammer tips, do not let the steel hammer bank cover assembly of early models snap into place as the hammer bank magnet attracts it. Any impact of the cover against the hammer bank can break hammer tips. 1. Position the hammer bank cover on the alignment pins on the hammer bank. Make sure the hammer bank cover is properly positioned over the alignment pins and hammer tips and lies flat on the hammer bank. 2. Install all 12 hold-down screws finger tight. Using a Torx T-10 driver, tighten the hold-down screws in the sequence shown in Figure 20. 3. With the seam of the folded lower edge of the ribbon mask facing inward (toward the hammer bank cover), position the ribbon mask on the alignment pins on the hammer bank cover. The ribbon mask is correctly installed when the angled ends of the ribbon mask match the angled ends of the hammer bank cover. Install the three clamp plates and six screws finger tight. Using a Torx T-10 driver, tighten the six screws in the sequence shown in Figure 20. 4. Install the shuttle frame assembly (page 177). 5. Return the printer to normal operation (page 101). 139

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Cover Assembly, Hammer Bank / Ribbon Mask
139
Cover Assembly, Hammer Bank / Ribbon Mask
Removal
1.
Prepare the printer for maintenance (page 100).
2.
Remove the shuttle frame assembly (page 177).
3.
Using a Torx T-10 driver, remove the six screws and three ribbon mask
clamp plates securing the ribbon mask to the hammer bank cover.
Remove the ribbon mask. (See Figure 20.)
4.
Using a Torx T-10 driver, remove the 12 screws securing the hammer
bank cover to the hammer bank. Remove the hammer bank cover. (See
Figure 20.)
Installation
1.
Position the hammer bank cover on the alignment pins on the hammer
bank. Make sure the hammer bank cover is properly positioned over the
alignment pins and hammer tips and lies flat on the hammer bank.
2.
Install all 12 hold-down screws finger tight. Using a Torx T-10 driver,
tighten the hold-down screws in the sequence shown in Figure 20.
3.
With the seam of the folded lower edge of the ribbon mask facing inward
(toward the hammer bank cover), position the ribbon mask on the
alignment pins on the hammer bank cover. The ribbon mask is correctly
installed when the angled ends of the ribbon mask match the angled ends
of the hammer bank cover. Install the three clamp plates and six screws
finger tight. Using a Torx T-10 driver, tighten the six screws in the
sequence shown in Figure 20.
4.
Install the shuttle frame assembly (page 177).
5.
Return the printer to normal operation (page 101).
If you are replacing just the ribbon mask, simply loosen the six screws until
you can slip the ribbon mask off the alignment pins.
Note
The hammer bank contains a strong magnet. To prevent damage to the
hammer tips, do not let the steel hammer bank cover assembly of early
models snap into place as the hammer bank magnet attracts it. Any impact
of the cover against the hammer bank can break hammer tips.
Caution