Lexmark C 746 Service Manual

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4.Pull open the UICC connector and disconnect the UICC cable.
Installation note:  Make sure the contact pins on the cable are facing up when reconnecting the operator 
panel cable to the connector.
5.Flip open the LCD connector and disconnect the LCD cable. 
						

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6.Remove the six screws (B) securing the operator panel card, then remove the operator panel card.
7.Remove the three screws (C) securing the LCD bracket, then remove the LCD bracket.
8.Remove the operator panel LCD together with the LCD protector.
B
C 
						

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9.Remove the operator panel LCD from the LCD protector.
Note:  The operator panel assembly consist of the operator panel LCD and the operator panel card.
Operator panel assembly removal (C748)
See operator panel assembly with card on page 7-3 for the part number. 
Warning:  This part might contain customer confidential information. See “Data Security Notice” on page 4-1 
for more details. After removing this part, return it to your next level of support so any data can be 
removed. If the customer requests to keep the part, they must sign a confirmation of memory device 
retention form.
Warning:  When replacing any one of the following components:
•Operator panel assembly
•System board
•Top access cover assembly
Only replace one component at a time. Replace the required component, and perform a POR before 
replacing a second component listed above. If this procedure is not followed, the printer will be 
rendered inoperable. 
1.Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-54.
2.Turn the top access cover assembly over. 
						

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3.Remove the eight screws (A) securing the position guide cover.
4.Pull open the operator panel connector and disconnect the operator panel cable.
Installation note:  Make sure the contact pins on the cable are facing up when reconnecting the operator 
panel cable to the connector.
A 
						

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5.Flip open the LCD connector and disconnect the LCD cable.
6.Remove the five screws (B) securing the operator panel card, then remove the operator panel card.
B 
						

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7.Remove the four screws (C) securing the LCD bracket.
8.Remove the LCD bracket and ground connector.
9.Remove the operator panel LCD.
C 
						

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Operator panel bezel removal
See operator panel bezel on page 7-3 for the part number.
1.Open the front cover.
2.Pry the bezel using a flat-head screw driver to remove.
Operator panel buttons removal (C746)
1.Remove the top access door cover assembly. See “Top access cover assembly removal” on 
page 4-54.
2.Turn the top access cover assembly over.
3.Remove the eight screws (A) securing the position guide cover.
A 
						

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4.Remove the six screws (B) securing the operator panel card, then remove the operator panel card.
5.Unsnap the small latches securing the buttons, then remove them.
B 
						

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Operator panel buttons removal (C748)
1.Remove the top access door cover assembly. See “Top access cover assembly removal” on 
page 4-54.
2.Turn the top access cover assembly over.
3.Remove the eight screws (A) securing the position guide cover.
4.Remove the five screws (B) securing the operator panel card, then remove the operator panel card.
A
B 
						

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5.Unsnap the small latches securing the buttons, then remove them.