HP 650C User Manual page 142

Test
Primer Verifies the ability of the primer to select
individual pens and run the pump for testing
priming capability. Also tests the optical
sensor's ability to initialize the primer cam.
Pen Continuity
four pens and the carriage. Uses a matrix of
primitives (PS) and addresses (Addr Sel) to
select nozzles to fire and determine pen ID. If
PS=00 and Addr Sel=0000, connections are
good. Any other numbers indicate a poor
contact. Press DOWN ARROW to see results
for each pen. Pens may be removed or
reseated while test is in progress.
test by pressing the ENTER button.
X-axis encoder
(X-axis feedback). STOP the test by pressing
the DOWN ARROW.
Y -axis encoder
center of its travel and then moves the
carriage left-to-right and right-to-left. A
ªPOSITION=º readout at the front panel
indicates carriage position to the user.
Bail Sensor
After the test is selected, manually raise and
lower the bail (the window sensor is disabled
during this test) and verify the display
changes in accordance to the bail position.
STOP the test by pressing the DOWN
ARROW button.
Media Sensor
After the test is selected, manually insert a
sheet of media so that it covers the media
sensor. The display should change as the
media is inserted and removed.
by pressing the DOWN ARROW button.
8-16 Troubleshooting
Table 8-3. Service Tests (Continued)
Description
Checks for proper interconnection between all
Verifies the operation of the servo loop
Moves the pen carriage assembly close to the
Verifies operation of the optical bail sensor.
Verifies operation of the optical media sensor.
Assemblies
Pens
Primer Assembly
Optical Sensor
Pens
STOP the
X-axis Encoder
X-axis Encoder
Cable
Main PCA
Y -axis Encoder
Y -axis Encoder
Cable
Main PCA
Encoder Strip
Drop Sensor
Drop Sense
Cable
Bail Sensor Flag
Main PCA
Mechanical
Interference
Media Sensor
Main PCA
Reflector Label
Media Opacity
STOP the test
Tested