HP Designjet 2800/3800cp Service Manual - Page 253
Encoder Strip, procedure, the encoder strip has sharp edges
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Encoder Strip Refer to figures 10 and 11 ' pages 8-34 and 8-35 Removal WARNING Switch off the printer and remove the power cord. 1. Remove the following: 1. Window and Top Cover ' page 8-15. 2. Right Hand Cover ' page 8-21. 3. Left Hand Cover ' page 8-18. WARNING Care should be taken while performing the following procedure, the encoder strip has sharp edges and could cause injury. Caution: To prevent damage to the encoder strip, hold it at the ends only. Caution: Lay the encoder strip down on a flat surface when not installed in the printer. 2. Remove the encoder strip roof over the carriage by squeezing it slightly. 3. Cut the cable tie which secures the magnetic core (item 1) to the encoder grounding (item 12). 4. Remove two T-15 screws (item 2) securing the grounding bridge (item 3) to the Y-axis motor assembly (item 4). Note: Working from the rear of the printer. 5. Remove the T-15 screw (item 5) securing the left side of the encoder strip (item 7). 6. Release the encoder strip from the retaining pin (item 6) on the Y-axis tensioner holder (item 8). It may help to pull the encoder spring (item 9) towards the middle of the printer to release some tension. 7. Remove the encoder spring (item 9) from the Y-axis motor assembly by releasing it from a retaining pin (item 10). 8. Remove the two nuts and two washers (items 11) securing the encoder spring to the encoder grounding (item 12). 8-32 HP DesignJet CP Series Printers Removal and Installation