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HP P2055 Manual

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    							13.Pull the ECU down until the mounting  bracket is below the sheet-metal tab.
Figure 6-108   Remove the ECU (12 of 14)
14.When the ECU is removed, you must carefully  pass the FFC and wire harness through the holes
in the chassis.
CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also,
do not straighten pre-folds in the FFCs.
Figure 6-109   Remove the ECU (13 of 14)
ENWW Internal assemblies 169
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    							15.Carefully slide the ECU out of the product.
Figure 6-110   Remove the ECU (14 of 14)
Reinstall the ECU
1.When you reinstall the ECU, look into the Tray 2  cavity, and make sure that the corners of the ECU
mounting bracket are engaged with the product chassis.
Figure 6-111   Reinstall the fuser (1 of 2)
170 Chapter 6   Removal and replacement ENWW
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    							2.Make sure that the ground connector is correctly fastened and fully seated on the connector lug.
Figure 6-112   Reinstall the fuser (2 of 2)
ENWW Internal assemblies 171
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    							Paper-feed-guide assembly
1.Remove the following components:
● Right cover. See 
Right cover on page 115
.
● Left cover. See 
Left cover on page 118
.
● Rear cover, rear door, and duplex-paper-feed assembly. See 
Rear cover, rear door, and
duplex-paper-feed assembly on page 120
.
NOTE: Only the HP LaserJet P2050 Series prod ucts have a duplex-paper-feed assembly
installed.
● Reverse-sensor assembly. See Reverse-sensor assembly; HP LaserJet P2050 Series
on page 142.
NOTE:
Only the HP LaserJet P2050 Series produc ts have a reverse-feed sensor installed.
●ECU. See Engine controller unit (ECU) on page 163
.
2. Release all of the wire harnesses  from the retainer (callout 1).
Figure 6-113   Remove the paper-feed-guide assembly (1 of 2)
1
172 Chapter 6   Removal and replacement ENWW
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    							3.Remove the paper-feed-guide assembly.
Figure 6-114   Remove the paper-feed-guide assembly (2 of 2)
ENWW Internal assemblies 173
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    							Main motor
1.Remove the following components:
● Right cover. See 
Right cover on page 115
.
● Left cover. See 
Left cover on page 118
.
● Rear cover, rear door, and duplex-paper-feed assembly. See 
Rear cover, rear door, and
duplex-paper-feed assembly on page 120
.
NOTE: Only the HP LaserJet P2050 Series prod ucts have a duplex-paper-feed assembly
installed.
● Reverse-sensor assembly. See Reverse-sensor assembly; HP LaserJet P2050 Series
on page 142.
NOTE:
Only the HP LaserJet P2050 Series produc ts have a reverse-feed sensor installed.
●Fuser. See Fuser on page 158
.
● ECU. See 
Engine controller unit (ECU) on page 163
.
● Paper-feed-guide assembly. See 
Paper-feed-guide assembly on page 172
.
2. Pass the wire harne ss through the opening in the chassis.
Figure 6-115   Remove the main motor (1 of 5)
174 Chapter 6   Removal and replacement ENWW
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    							3.Release the wire harnesses from the guide, and then remove one screw (callout 1).
Figure 6-116   Remove the main motor (2 of 5)
1
4.Remove the guide.
Figure 6-117   Remove the main motor (3 of 5)
ENWW Internal assemblies 175
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    							5.Remove three screws (callout 2).
Figure 6-118   Remove the main motor (4 of 5)
2
6.Remove the main motor.
Figure 6-119   Remove the main motor (5 of 5)
176 Chapter 6   Removal and replacement ENWW
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    							Face-down-drive or duplexing-paper-feed assembly
The HP LaserJet P2030 Series products have a face-down-drive assembly installed.
The HP LaserJet P2050 Series products have  a duplexing-paper-feed assembly installed.
These components appear identical from the outsi de, but they have different internal gears and
functions. The same procedure is  used to remove either component.
1. Remove the following components:
● Right cover. See 
Right cover on page 115.
● Left cover. See 
Left cover on page 118.
● Rear cover, rear door, and d
uplex-paper-feed assembly. See 
Rear cover, rear door, and
duplex-paper-feed assembly on page 120.
NOTE: Only the HP LaserJet P2050 Series products have a duplex-paper-feed assembly
installed.
● Top cover assembly. See Top-cover assembly on page 124.
● Fan. See 
Fan on page 140
.
2. Remove two screws (callout 1), and then release  the wire harnesses from the guide (callout 2).
NOTE:You might have to disconnect some of the connectors on the sub PCA to gain enough
slack in the wire harnesses to release them from the guide.
Figure 6-120   Remove the face-down-drive or duplexing-paper-feed assembly (1 of 4)
2
1
ENWW Internal assemblies 177
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    							3.Remove the fan duct.
Figure 6-121   Remove the face-down-drive or dupl exing-paper-feed assembly (2 of 4)
4.Remove three screws (callout 3).
Figure 6-122   Remove the face-down-drive or dupl exing-paper-feed assembly (3 of 4)
3
178 Chapter 6   Removal and replacement ENWW
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