HP LaserJet 4250 Service Manual - Page 276

Reinstallation notes for the paper-feed assembly Make sure that the clutch tab on the right side of the paper-feed assembly is inserted into the hole in the plastic frame. Make sure that the wire-harnesses are fed through the hole in the plastic frame. When the paper-feed assembly is installed, the sensor-flag spring must be correctly positioned so that the flag can operate. If a paper-jam error message (13.20.00 JAM) appears on the control-panel display after you replace the paper-feed assembly, verify that this sensor-flag spring is installed correctly. Use the antistatic bar (see Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only)) to release the sensor spring. Hook the spring over the flag tab (callout 1 in Figure 6-84 Correctly install the paper-feed assembly sensor flag). Fasten the paper-feed assembly to the chassis with the flag spring positioned in the hole in the transfer assembly. Release the spring from the tab on the flag (callout 2 in Figure 6-84 Correctly install the paper-feed assembly sensor flag). Verify that the flag is held in the upright position, can freely move, and always returns to the rpright position. If the flag does not move freely, or does not return to the upright position, an error message (13.20.00 JAM) will appear on the control-panel display when you turn on the printer power. Figure 6-84 Correctly install the paper-feed assembly sensor flag 262 6 Removing and replacing parts