Tektronix Phaser 840, Service Manual

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38
Phaser 840 and 850 Color Printers
8,000: Cap/Wipe/Purge drive
8,001.44:
CAP_FAULT_HOME_
SENSOR The cap-home sensor did not see the sensor’s flag when
expected. The home sensor may be faulty, or the paper-
feed motor may not be operating. The cap/wipe/purge
clutch may be failing, or the assembly may be jammed and
unable to move. Inspect check the paper-exit drive belt
and the gear on the right end of the duplex roller shaft next
to the paper path motor.
Table 4 Front panel and fault history log error codes and messages
Error code Meaning
8,001.44
C/W/P can’t
find home
Check alignment
of C/W/P assembly
belts
C/W/P
belts aligned
OK?
With C/W/P out of home
position, observe
exit roller while
turning on the printer
Does the
exit roller turn?
No
Replace C/W/P clutch
or reseat belt
No
Replace or
reseat flag
Replace power
control board
With C/W/P out of home
position, observe C/W/P
assembly motion while
turning on the printer
Does C/W/P
assembly move
at all?
Is C/W/P
home sensor flag
functional?
Align the C/W/P
assembly belts
Does
error clear?
Inspect paper-path
motor drive train and
exit-roller drive belt,
gears and bushings
Drive train OK?
Replace I/O right
board
No
No
No
No
Yes
Yes
Yes
No
Replace paper
path motor
Measure resistance
of paper-path motor
Resistance
approximately
2 Ohms?
Yes
Yes
Yes
Yes
0388-84
Replace or reseat
defective parts
Done