Tektronix PHASER 560 Service Manual page 139

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Table 6-1 Print engine service error codes (cont'd.)
Error code
63
70
71
72
73
74
80
81
82
83
84
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Meaning of error code and what to do about it
Main motor lost sync.
1. Is the imaging unit properly installed and locked in position?
2. Do the photoconductive and accumulator belts rotate when driven
by the main motor? Manually turn the main drive gears to rotate the
belts of the imaging unit. If the gear is difficult to turn, replace the
imaging unit.
3. Inspect the drive gear for missing teeth.
4. Does the main motor rotate? Check the main motors wiring harness
to the engine control board at CN15. If the wiring checks out, replace
the main motor.
5. Replace the engine driver board.
Program ROM Checksum error.
1. Replace the engine control board.
Program SRAM Checksum error.
1. Replace the engine control board.
EEPROM Checksum error (ECU).
1. Replace the engine control board.
EEPROM Checksum error (imaging Unit).
1. Replace the imaging unit
2. Replace the engine control board.
EEPROM Checksum error (fuser).
1. Replace the fuser
2. Replace the engine control board.
VSYNC time-out.
1. Check connection between the image processor board and the
engine control board
2. Replace the engine control board.
3. Replace the image process board.
Power missing error. Engine control board not powered.
1. Check wiring harness CN25 to the engine control board.
Serial time-out error.
1. Check the connection between the image processor board and the
engine control board.
2. Replace the image process board.
3. Replace the engine control board.
Command error. The image processor sent bad data to the engine
control board
1. Reset the image processor NVRAM.
2. Check the connection between the image processor board and the
engine control board.
3. Replace the image process board.
4. Replace the engine control board.
Parity error.
1. Reset the image processor NVRAM.
2. Check the connection between the image processor board and the
engine control board.
3. Replace the image process board.
4. Replace the engine control board.
6
Troubleshooting
6-21
Service Manual