HP 3500 Service Manual - Page 466
Print/Stop Test, DUPLEX MOTOR 3700 only
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8. ALIENATION MOTOR Drives the delivery motor (M2) and the developing engaging clutch (CL3) which rotates the rear output paper path rollers and engages/disengages the CMYK print cartridge developer rollers. This test does not rotate the print cartridge developer rollers. 9. TRANSFER 1 MOTOR Drives the primary transfer roller engaging motor (M5) which engages/disengages the CMYK ITB primary charging rollers. 10. MP TRAY SOLENOID Drives the feed motor (M1) and the multi purpose pickup solenoid (SL1) which picks paper from the Tray 1. 11. TRAY 2 SOLENOID Drives the feed motor (M1) and the cassette Tray 2 pickup solenoid (SL2) which picks paper from Tray 2. 12. FUSER MOTOR Drives the feed motor (M1) and registration clutch (CL1) for 10 seconds which rotates the fuser, paper path rollers, and Tray 3 drive rollers. 13. DUPLEX MOTOR (3700 only) Drives the delivery motor (M2) which rotates the rear output paper path rollers. 14. TRANSFER 2 SOLENOID Drives the feed motor (M1) and the secondary transfer roller engaging solenoid (SL4) which rotates the fuser, paper path rollers, Tray 3 drive rollers, and engages the secondary transfer roller which raises it about 1/2 inch. 15. DUPLEX SOLENOID Drives the feed motor (M1) and the duplexing feed solenoid drive (SL5) which rotates the fuser, paper path rollers, and duplexing feed roller. Remove Tray 2 to see the gear turning on the right side of the duplex area inside Tray 2. 16. BLACK DEVELOPER DRIVE Drives the drum motor (M3) and black print cartridge drive clutch (CL2) for 10 seconds which rotates the ITB belt, CMYK print cartridge OPC drums, and black developer. 17. TRAY 3 DRIVE Drives the feed motor (M1) and paper feeder pick-up clutch (CL4) for 10 seconds which rotates the fuser, paper path rollers, and Tray 3 drive rollers. 18. TRAY 3 SOLENOID Drives the feed motor (M1) and paper feeder pickup solenoid (SL3) which picks paper from Tray 3. Print/Stop Test This diagnostic test can be used to isolate the cause of problems, such as image formation defects and jams, within the engine. This test allows you to stop the paper anywhere along the printer's paper path. The test can be programmed to stop printing internal pages or an external print job when the paper reaches a certain position. The test can also be programmed to stop from 0 to 60,000 mS. If the timer is set to a value that is greater than it takes to print the job, there are two ways to recover the printer. 442 Chapter 7 Troubleshooting ENWW