Ebooks PDF Troubleshooting HP LaserJet III Malfunction


HP LaserJet III Printer Pictures
Troubleshooting: HP LaserJet III Malfunction 50 SERVICE Troubleshooting: HP LaserJet III Malfunction 50 SERVICE Version Info: This is the second, optimized version of the troubleshooting description HP-LaserJet-III_Repair.doc.pdf dated mid 2003. Error 50 Service: If the HP LaserJet III printer shows 50 SERVICE after power up and the fuser is o.k. then maybe the AC Driver / Safety Circuit board of the AC Power Module is defect. This PCB with part number RG11438 is made from cheap PCB base material which can render a conductive path between adjacent feedthrough holes if it is old or was over heated. First Check: 1.) Switch off the printer and disconnect the power cord. 2.) Check the fuser module (see below) or replace it by a functioning one. 3.) If this does not help then replace the AC Power Module or repair it as described below: Remove the AC Driver / Safety Circuit PCB RG1-1438 from the printer: There is a good (but German) description with many photos from Johannes Schubert on how to open the printer.

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Ebooks PDF Troubleshooting HP LaserJet III Malfunction Category : HP (Hewlett Packard)
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