Xerox 4400DT Service Manual - Page 135

Stacker Offset Operation Not Performed Stacker Offset Operation Not Performed Troubleshooting Procedure Step Actions and Questions Yes No 1 Manually move the Offset Assembly from one side to Go to step 2. Replace the the other. Offset Roller Does the Offset Assembly move smoothly? Assembly (RRP 10.14, page 6-114). 2 1. Enter Service Diagnostics and select Motors/Fans Replace the Go to step 3. Test. 2. Scroll to Stacker Offset Motor and press OK. Engine Logic Board (RRP Does the Offset Assembly shift right, then return 9.3 on left? page 6-89). 3 1. Switch the printer power OFF. Replace the Replace the 2. Remove the Inner Exit Chute Assembly (RRP 10.6, page 6-106). 3. Disconnect P/J229 from the Stacker PWB. 4. On the disconnected plug, measure the resistance between pins 1 and 3, pins 1 and 5, pins 2 and 4, and between pins 2 and 6. Does the resistance measure between 245 and 265 ohms? Stacker PWB (RRP 10.7 on page 6-107). If the problem persists, replace the Stacker Offset Motor (RRP 10.17, page 6-118). Engine Logic Board (RRP 9.3 on page 6-89). Envelope Feed Clutch Envelopes fail to feed, or feed incorrectly. Envelope Feed Clutch Troubleshooting Procedure Step Actions and Questions Yes 1 1. Enter Service Diagnostics and select Clutch Tests. Go to step 5. 2. Scroll to Envelope Feeder and press OK. Can you hear the clutch energize? 2 1. Switch Power Off. Go to step 4. 2. Remove the Left Interface Cover (RRP 1.1 on page 6-6), Left Cover (RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Enter Service Diagnostics and select Clutch Tests. 4. Scroll to Envelope Feeder. 5. On the Engine Logic Board, check voltage between P/J23 Pin 1 and frame ground. 6. Press OK. Does the voltage pulse from 0.0 VDC to 3.3 VDC then return to 0.0 VDC? No Go to step 2. Go to step 3. 3-38 Phaser 4400 Laser Printer Service Manual