Xerox Phaser 840 Service Manual page 146

Table 4-4 Check Menu Value Key
Test ID#
Paper Path Timing
ID# 4
(cont'd)
Paper Path Drive (Test ID # 5) - This test runs successive pieces of paper through the media
path at low current levels to determine the minimum drive current. Due to the nature of the test
the last sheet results in a paper jam, and in some cases causes engine firmware to halt. By
counting the number of sheets that were tried, including the sheet that jammed, you can
interpret the test results (number of sheets is equal to scan cycles).
Test ID#
Paper Path Drive
ID# 5
4 - 130 Phaser 840/850/860/8200 Color Printer - Service Manual
R# Definition
9 Duplex feed clutch
to width A4 flag
10 Duplex width A4
flag to preheat exit
flag
11 Preheat exit flag
to strip exit flag
12 Strip exit flag to
paper exit flag
R# Definition
0 % drive current at
end scan
1 Scan cycles
2 Leading edge
sensor id
3 Trailing edge
sensor ID
Results Interpretation/Actions
Media was not deskewed
successfully. Ensure proper tray
> 220
loading and verify front door
< 180
deskew fingers are not damaged.
This may also be due to a bad
feed clutch, slippery feed roller or
misaligned sensor.
Media was not deskewed
successfully. Ensure proper tray
> 180
loading and verify front door
< 160
deskew fingers are not damaged.
This may also be due to a bad
feed clutch, slippery feed roller or
misaligned sensor.
The media was delayed in
reaching the strip sense flag.
> 730
Light weight or coated media
may tend to stick to the transfix
roller. This may also occur if the
transfix roller is dirty or not
properly oiled. The rapid release
guide may also be bound or
damaged.
> 150 Something may be obstructing
the exit path.
Results Interpretation/Actions
Inspect the paper path drive
components engaged at the time
> 74.7
of the paper stall for binding or
wear.
Inspect the paper path drive
components engaged at the time
> 4
of the paper stall for binding or
wear.
Sensor ID Codes:
0 = None 9 = Stripper Exit
1 = Aux2 Pick 10 = Exit
2 = Aux1 Pick 11 = Duplex Entry
3 = Std Pick 12 = Duplex Width A
4 = Handfeed 13 = Duplex Preheat Entry
5 = Width A 14 = Duplex Width A4
6 = Preheat Entry 15 = Duplex Preheat Exit
7 = Width A4 16 = Duplex Stripper Exit
8 = Preheat Exit 17 = Duplex Exit