HP LaserJet Quick Reference Service Manual Page 87

Volume i.
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User manual - 449 pages
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LaserJet 5P, 4P, and 4L
The DC power supply circuitry, located on the DC controller PCA,
generates +5 DC and +12 DC. Uses for each are summarized below.
+5 DC
Formatter PCA
Photosensors
DC controller circuitry
Laser scanner assembly
+12 V DC
High voltage power supply
Main motor
Solenoids
Fan (through the laser scanner assembly)
Figure 3-3
Power System Block Diagram
EN
LaserJet 5P, 4P, and 4L – 85
3

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