HP LaserJet 4 Service Manual - Page 261
ERROR Message
View all HP LaserJet 4 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 261 highlights
Figure 7-6 Fuser Assembly Connector 51 ERROR Message The 51 ERROR, and the 41.2 ERROR are caused by Beam Detect failures. If the beam detect signal is lost for more than 2 seconds the error is posted as a 51 ERROR. The 41.2 ERROR can be cleared by pressing [Continue] (or Go). The 51 ERROR may be cleared by power cycling the printer. Table 7-11 51 ERROR Beam Detect Checks Checks 1. Are all connectors on the DC Controller properly seated? 2. Is the Laser/Scanner Assembly Defective? 3. Is the DC Controller Defective? 4. Has the printer been moved from a cold to a warm room? Action Inspect connectors and wiring. Reseat or replace cables if necessary. A defective Laser/Scanner Assembly can cause a 51 ERROR by spinning the scanning mirror at the wrong speed. Replace the Laser/Scanner Assembly. Replace the DC Controller. Allow the printer to stand 6 hours until any condensation has dissipated. Troubleshooting 7-31