09/2007
6-21
Phaser 8860/8860MFP Service Manual
Print Engine Check Menu Tests
Diagnostics
Initial Issue
Drum Heater Test
The Drum heater test characteristics and descriptions are listed in the following table.
Ink Melt Heater Tests
The four Ink Melt Heater (YCMK) test characteristics and descriptions are listed in the following
table. Select the color of Ink Melt Heater to view the test results.
Paper Path Menu
These tests exercise specific sections of the media transport path. These tests assume the
paper path drive to be basically functional, and move paper through the system in a standard
test profile, which is similar to, but not an exact duplicate of the various transport motion pro-
files used during normal operation. Therefore the timing information does not correspond to
normal transport timing. When a test is run, a sheet of media is fed from the lowest numbered
tray containing media through the simplex or duplex paper path and the data is displayed. Sub-
sequent requests for path test data is derived from captured data without further testing. Path
data remains in memory until a non paper path test is selected, the Clear Paper Path Data is
selected, a system reset, or restart is performed. The tests measure the transit of A or A4
media. The media size and source Tray is captured and reported with the other data. The data
output format accommodates the maximum number of parameters involved in moving media
from any tray through either the simplex or duplex paper path. Any parameters not pertaining to
a particular paper movement are listed as undefined. These tests may be performed with any
weight media, but typical values assume a nominal 20 lb. weight media
4
Response Time (ms)
N/A
Reports the time following the applica-
tion of power to the specified heater that
the corresponding temperature begins to
increase.
5
End Heating Temperature
(deg c)
N/A
Reports the temperature at the end of
the heating interval.
6
Peak Temperature (deg c)
N/A
Reports the peak temperature following
the end of the heating interval.
7
Peak Temperature Time (ms) N/A
Reports the time following the applica-
tion of power to the specified heater until
the peak temperature is reached.
8
Final Temperature (deg c)
N/A
Reports the final temperature at a fixed
time following the peak temperature
time.
Table 20 Drum Heater Nominal Values
R# Characteristic
Typical Value
Result
0
AC Line Voltage (volts)
N/A
Reports the baseline AC voltage prior to
the start of the test.
1
Initial Temperature (deg C)
N/A
Reports the thermistor temperature prior
to the application of heater power.
2
Average AC Current Delta
(amps)
N/A
Reports the average difference from
baseline AC current during the specified
heating interval.
3
Average AC Voltage Delta
(volts)
N/A
Reports the average difference from
baseline AC volts during the specified
heating interval.
4
Response Time (ms)
N/A
Reports the time following the applica-
tion of power to the specified heater that
the corresponding temperature begins to
increase.
5
End Heating Temperature
(deg c)
N/A
Reports the temperature at the end of
the heating interval.
6
Peak Temperature (deg c)
N/A
Reports the peak temperature following
the end of the heating interval.
7
Peak Temperature Time (ms) N/A
Reports the time following the applica-
tion of power to the specified heater until
the peak temperature is reached.
8
Final Temperature (deg c)
N/A
Reports the final temperature at a fixed
time following the peak temperature
time.
Table 19 Preheater Nominal Values
R# Characteristic
Typical Value
Result
Table 21 Ink Melt Heater Nominal Values
R# Characteristic
Typical Value
Result
0
AC Line Voltage (volts)
N/A
Reports the baseline AC voltage prior to
the start of the test.
1
Initial Temperature (deg C)
N/A
Reports the thermistor temperature prior
to the application of heater power.
2
Average AC Current Delta
(amps)
N/A
Reports the average difference from
baseline AC current during the specified
heating interval.
3
Average AC Voltage Delta
(volts)
N/A
Reports the average difference from
baseline AC volts during the specified
heating interval.
4
Response Time (ms)
N/A
Reports the time following the applica-
tion of power to the specified heater that
the corresponding temperature begins to
increase.
5
End Heating Temperature
(deg c)
N/A
Reports the temperature at the end of
the heating interval.
6
Peak Temperature (deg c)
N/A
Reports the peak temperature following
the end of the heating interval.
7
Peak Temperature Time (ms) N/A
Reports the time following the applica-
tion of power to the specified heater until
the peak temperature is reached.
8
Final Temperature (deg c)
N/A
Reports the final temperature at a fixed
time following the peak temperature
time.
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