HP 2500 L Service Manual

							EN 5 Removal and replacement139
Registration-roller assembly
1Remove two screws (callout 1) from the registration-shutter assembly.
2 Rotate the registration-roller assembly toward the front of the printer and then lift it towards 
the rear of the printer and up to remove it from the printer.
Figure 86. Removing the registration-roller assembly
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							140Removal and replacement C9706-90926
Toner-catch tray
The toner-catch tray is secured by two tabs underneath the tray, towards the front of the tray.
1Release one tab on either side of the toner-catch tray and then pull the tray approximately 
two or three millimeters (approximately 0.125 inches) towards the front of the printer to make 
sure that the tab doesn ’t re-catch.
2 Release the tab on the other side and then lift the tray out of the printer.
Figure 87. Removing the toner-catch tray 
						

							EN 5 Removal and replacement141
Transfer-roller plate
CAUTIONDo not touch the black sponge portion of the transfer roller.
1 Remove the toner-catch tray (see page 140).
2 Remove two screws (callout 1) from the transfer-roller plate.
3 Lift the transfer-roller plate straight up to remove it from the printer.
Figure 88. Removing the transfer-roller plate
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							142Removal and replacement C9706-90926
Transfer roller
CAUTION Do not touch the black sponge portion of the transfer roller.
1 Remove the following covers and assemblies:
toner-catch tray (see page 140)
 transfer-roller plate (see page 141)
2 Use needle-nose pliers to gently squeeze the small tabs at the right side of the transfer roller 
(see the detail in figure 89) and then also squeeze the tabs at the left side of the transfer 
roller to release the roller.
Note Be careful not to bend the thin metal strip adjacent to the tabs on the right side of the roller.
3 Lift the transfer roller up from the right side, slide it to the right, and lift it out of the printer.
Note The small grounding spring that is underneath the left side of the transfer roller is attached to the 
transfer roller. It is removed with the transfer roller.
The small grounding spring that is underneath the right side of the transfer roller remains in the 
chassis.
Figure 89. Removing the transfer roller 
						

							EN 5 Removal and replacement143
Feed-drive shaft
1Remove the following covers and assemblies:
right- and left-side covers (see page 93)
 toner-catch tray (see page 140)
 transfer-roller plate (see page 141)
 transfer roller (see page 142)
2 Remove one screw (callout 1) from the gear cover, and then lift the gear cover to remove it.
3 Lift the belt roller (callout 2) from its hooks.
4 Use a small flatblade screwdriver to pry the feed-drive shaft (callout 3) off of the hooks that 
secure it to the printer.
Note Unless the feed-drive shaft itself is damaged, there is no need to remove the shaft.
5 Use a small flatblade screwdriver to pry four pulleys (callout 4) from their hooks.
6 After the feed-drive shaft and the pulleys are released, remove timing belt (callout 5) and the 
small feed belts by sliding them off of the right end of the feed-drive shaft.
Note Callout 6 shows the roller on the fuser wrap-jam sensor. The roller must be removed first if you 
want to remove the ECU pan (the bottom plate of the printer).
Figure 90. Removing the feed-drive shaft
Reinstall note
Examine the timing belt (callout 5) before removing it from the printer. The leading and trailing 
sides of the ridges are different and the belt must be reinstalled correctly to prevent media-feed 
problems.
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							144Removal and replacement C9706-90926
ECU pan
1Remove the following covers and assemblies:
right- and left-side covers (see page 93)
 interface cover (see page 98)
 formatter cage (see page 99)
 optional tray 2 (see page 106)
 toner-catch tray (see page 140)
2 Unplug five cable connectors (callout 1) from the dc controller.
3 Remove one screw (callout 2) from the grounding wire.
Figure 91. Removing the ECU pan (1 of 2)
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							EN 5 Removal and replacement145
4
Turn the printer over so that it rests on its top.
5 Remove one screw from the left side of the printer (callout 3)
6 Remove eight screws (callout 4) from the bottom of the ECU pan.
7 Lift the ECU pan off of the printer.
Figure 92. Removing the ECU pan (2 of 2)
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							146Removal and replacement C9706-90926
Reinstall note: ECU connections
Make sure that the grounding springs are attached to each of the eight ECU connections before 
reinstalling the ECU pan.
Figure 93. ECU connections 
						

							EN 5 Removal and replacement147
Sub-high-voltage transformer PCA
1Remove the following covers and assemblies:
right- and left-side covers (see page 93)
 optional tray 2 (see page 106)
 fuser (see page 92)
 ECU pan
2 Unplug one connector (callout 1) from the high-voltage transformer PCA.
3 Remove two screws (callout 2).
4 Lift up the sub-high-voltage transformer PCA and its holder, and then unplug one connector 
(callout 3) from the high-voltage transformer PCA.
Figure 94. Removing the sub-high-voltage transformer PCA
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							148Removal and replacement C9706-90926
High-voltage transformer PCA
1Remove the following covers and assemblies:
right- and left-side covers (see page 93)
 interface cover (see page 98)
 formatter cage (see page 99)
 optional tray 2 (see page 106)
 ECU pan (see page 144)
 Sub-high-voltage transformer PCA (see page 147)
2 Release two cable holders (callout 1) and then unplug two connectors (callout 2).
3 Remove two screws (callout 3).
4 Pinch six plastic pins (callout 4) and then lift the high-voltage transformer PCA off of the ECU 
pan.
Figure 95. Removing the high-voltage transformer PCA
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