Xerox 4400DT Service Manual - Page 112
Main Motor Assembly, Main Motor Assembly Troubleshooting Procedure, Actions and Questions
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Power Supply Troubleshooting Procedure (cont'd.) Step Actions and Questions 4 1. Switch the printer power OFF. 2. Reconnect all the P/Js to the LVPS. 3. Disconnect the following from the Engine Logic Board: I P/J35 (Stacker PWB) (RRP 10.7 on page 6-107) I P/J34 (Duplex PWB) (RRP 12.4, page 6-144) I P/J33 (Size 1 PWB) (RRP 3.13 on page 6-42) I P/J22 (Laser) (RRP 7.4, page 6-82) I P/J21 (Laser) (RRP 7.4, page 6-82) I P/J23 (Connector PWB) (RRP 9.7, page 6-94) I P/J31 (Output Tray Full Sensor) (RRP 6.6, page 6-72) I P/J30 (Rear Interlock Switch) (RRP 9.10, page 6-97) I P/J25 (Print Cartridge Sensor) (RRP 7.3, page 6-81) I P/J32 (Exit Motor) (RRP 6.5, page 6-71) I P/J29 (Main Motor) (RRP 8.1 on page 6-84) I P/J26 (HVPS PWB) (RRP 9.6, page 6-92) I P/J27 (Fuser Sensors) (RRP 6.2 on page 6-66) 4. Switch the printer power ON and measure the voltages listed in Step 1. Are all voltages correct? 5 1. Switch the printer power OFF. 2. Reconnect one of the plugs disconnect in step 4. 3. Switch the printer power ON. 4. Measure the voltages listed in Step 1. Are all voltages correct? Yes No Go to step 5. Replace the Engine Logic Board (RRP 9.3 on page 6-89). Repeat the step with the next disconnected plug. Replace the component just connected to the Engine Logic Board. Main Motor Assembly Main Motor Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select the Motors/Fan Problem Go to step 2. Test. 2. Scroll to Main Motor and press OK. solved, return to Does the Main Motor rotate? Service Flowchart on page 2-2 and continue. Phaser 4400 Laser Printer Service Manual 3-15
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