Environmental Sensor - HP LaserJet PRO M521 Repair Manua

Environmental sensor

1.
Before proceeding, remove the following:
Formatter cover. See
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Dummy cover. See
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Formatter PCA. See
●
Rear cover assembly. See
●
Left cover. See
●
Right-rear cover. See
●
Tray 1 cover. See
●
Cartridge-door assembly. See
●
Right cover assembly. See
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Lower right cover. See
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Document feeder/scanner assembly. See
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Top cover. See
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DC controller and sheet-metal plate. See
●
Low-voltage power supply. See
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2. Release one tab (callout 1), and then release the sensor. Release the wire harness (callout 2) from
the retainers.
Figure 1-191
128 Chapter 1 Removal and replacement
Formatter cover on page
Dummy cover on page
Formatter PCA on page
Rear cover assembly on page
Left cover on page 28.
Right-rear cover on page
Tray 1 cover on page
Cartridge-door assembly on page
Right cover assembly on page
Lower right cover on page
Top cover on page
Low-voltage power supply (LVPS) on page
Remove the environmental sensor (1 of 2)
18.
23.
19.
24.
30.
32.
36.
41.
Document feeder/scanner assembly on page
95.
DC controller on page
2
1
34.
102.
106.
ENWW
46.