Lexmark X940e Owners Manual

Repair information4-259
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1X 500-sheet drawer (1TM)—tray module drive motor assembly removal 
1. Remove the rear cover. See “1X 500-sheet drawer (1TM)—rear cover removal” on page 4-242.
2. Disconnect the connector from the tray module drive motor (A). 
3. Remove the two screws securing the tray module drive motor (A) to the machine. 
4. Remove the tray module drive motor (A). 
1X 500-sheet drawer (1TM)—1TM controller card assembly removal 
1. Remove the rear cover. See “1X...

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Setup and adjustments
Sensor (ATC) setup  
Step Check Yes No
1 Warning: Before installing any new developer unit assembles in the machine, record the bar code 
number located on the sensor (ATC) for all new developer units being installed. 
Example:
Sensor (C ATC) XXX
Sensor (M) ATC XXX
Sensor (Y) ATC XXX
Sensor (K) ATC XXX
2Using the bar code number recorded from the sensor (ATC) on each of the new developer unit 
assemblies in step 1, locate the values...

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4Update the following settings using the newly converted values from step 2 for all newly installed 
developer units:
Sensitivity gradient
Sensor output reference
1. Enter the Diagnostics Menu.
2. Touch ENGINE ADJUST.
3. Touch ATC Sensor Adjust Values
4. Enter new values.
5. Touch Submit.
Warning:  This procedure must be done for all new developer unit assemblies being installed or print 
quality problems may occur.
5Note: Ensure that all photoconductor...

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14 708 156
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17 844 144
18 889 140
19 934 136
20 527 174
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22 617 166
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26 799 150
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28 889 142
29 934 138
30 527 176
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35 753 156
36 799 152
37 844 148
38 889 144
39 934 140
40 527 178
41 572 174
42 617 170
43 663 166
44 708 162
ATC VALUE CONVERSION CHART
Bar code number 
(last 2 digits)Sensitivity gradient default valueStandard TC output default...

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45 753 158
46 799 154
47 844 150
48 889 146
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50 526 179
51 572 176
52 617 172
53 663 168
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55 753 160
56 799 156
57 844 152
58 889 148
59 934 144
60 526 181
61 572 178
62 617 174
63 663 170
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65 753 162
66 799 158
67 844 154
68 889 150
69 934 146
70 526 183
71 572 180
72 617 176
73 663 172
74 708 168
75 753 164
ATC VALUE CONVERSION CHART
Bar code number 
(last 2 digits)Sensitivity gradient default valueStandard TC output...

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76 799 160
77 844 156
78 889 152
79 934 148
80 526 185
81 572 182
82 617 178
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84 708 170
85 753 166
86 799 162
87 844 158
88 889 154
89 934 150
90 526 187
91 572 184
92 617 180
93 663 176
94 708 172
95 753 168
96 799 164
97 844 160
98 889 156
99 934 152
ATC VALUE CONVERSION CHART
Bar code number 
(last 2 digits)Sensitivity gradient default valueStandard TC output default value 

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Color registration (RegCon)
Measurement cycle test
Step Check Yes No
1 Perform the Measurement cycle test.
1. Enter the Diagnostics Menu.
2. Touch ENGINE ADJUST.
3. Touch RegCon adjust
4. Touch Measurement cycle
Does the above test pass?Perform the 
“Control sensor 
check”. 
See “Control 
sensor check” on 
page 4-266.
Go to step 2.
2Check the transfer belt unit assembly for damage.
Does above component show signs of damage on the 
frame or on the...

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Control sensor check
Control sensor cycle
Step Check Yes No
1Perform the Control sensor check test.
1. Enter the Diagnostics Menu.
2. Touch ENGINE ADJUST.
3. Touch RegCon adjust
4. Touch Control Sensor Check
Does the above test pass?Perform the 
“Control sensor 
cycle”. 
See “Control 
sensor cycle” on 
page 4-266.Go to step 2.
2Check the transfer belt unit assembly for damage.
Does above component show signs of damage on the 
frame or on the belt?Replace...

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Belt edge learn test
Skew fine setup
Step Check Yes No
1Perform the Belt edge learn test.
1. Enter the Diagnostics Menu.
2. Touch ENGINE ADJUST.
3. Touch RegCon adjust
4. Touch Belt edge learn
Does the above test pass?Perform “Skew 
setup”. 
See “Skew fine 
setup” on 
page 4-267.Go to step 2.
2Replace the transfer belt unit assembly. 
See “Transfer belt unit assembly removal” on 
page 4-16.
Does the error continue?Perform “Skew 
setup”. 
See “Skew fine...

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2Perform the Skew fine setup printhead adjustment.
Tou ch Cycle result values.
Locate the following new values for the following settings:
Y- Skew adjustment
M- Skew adjustment
C- Skew adjustment
K- Skew adjustment
Turn the appropriate printhead adjustment screws located 
behind the waste toner cartridge the number of clicks 
(rotation until a snap sound is heard and felt) based on the 
above settings. 
+values require turning the screw Clockwise
- values...