Tektronix Phaser 740 Service Manual page 44

Print engine service error codes
Error code
51
52
53
60
61
62
32
Phaser 740 and 750 Color Printers
Meaning of error code and what to do about it
Filter fan error.
1. Is +24 VDC being supplied to the fan from the engine control
board's CN9 pins 1 and 2? If it is, replace the fan. If not,
replace the engine control board.
Auto-duplex unit fan error.
1. Replace the tray sensor board.
2. Is +24 VDC being supplied to the fan from the engine control
board thru the duplex unit's interconnect connector and wiring
harness during duplex printing? If it is, replace the auto-duplex
unit. If not, replace the engine control board.
Transparency sensor error
1. Clear media jam
2. Replace paper feed unit.
Multi-purpose tray pick-up roller motor error
1. Is the tray over-filled. Too much media will overload the motor.
2. Is the multi-purpose tray motor properly connected to the paper
feeder connector CN608. Inspect its wiring harness.
3. Inspect the wiring harness leading from the paper feed motor to
connector CN20 of the engine control board.
4. Replace the paper feeder.
5. Replace the engine control board.
Toner cartridge (sleeve) drive motor lost sync.
1. Are the toner cartridges properly installed in position?
2. Does each toner cartridges developer roller rotate when driven
by the motor? If not replace the toner cartridge.
3. Does the toner cartridge motor rotate? Check the toner
cartridge motor's wiring harness to the engine control board at
CN26. If the wiring checks out, replace the toner cartridge
motor.
4. Check the toner cartridge drive gears.
5. Replace the engine control board.
Paper feed motor lost sync.
1. Does the paper feed motor run and generate torque?
2. Does the gear train of the paper feeder rotate properly?
3. Inspect the fuser. Did the fuser roll wrap itself around the fuser's
hot roller?
4. Does the gear train of the fuser rotate properly?
5. Does the gear train of the paper eject rollers rotate properly?
6. Inspect the wiring harness leading from the paper feed motor to
connector CN20 of the engine control board.
7. Replace the paper feed motor.
8. Replace the engine control board.