HP P3015 Service Manual

Figure 1-29  Solenoids and clutches (Tray 3 and Tray 4)
PS451
PS8008
SL3
M8001
SW461
CL1
Table 1-13
  Solenoids and clutches (Tray 3 and Tray 4)
ItemDescription
SL3Paper feeder pickup solenoid
CL1Paper feeder pickup clutch
1Tray 3 and Tray 4 are identical 500-sheet input trays.
ENWW Pickup, feed, and delivery system 37 

Tray 1 or Tray 2
Pickup and feed unit
The pickup and feed unit uses the following components and processes.
Cassette paper size detection/cassette paper detection
NOTE:To find the following components, see Photo sensors and switches on page 34.
● PS3; cassette media-presence sensor
● PS225; media width sensor (detects media width 
after the media enters the paper path)
Cassette pickup
NOTE: To find the following components, see Solenoids and clutches on page 36.
●SL2; cassette (Tray 2) pickup solenoid...

Paper pickup and feed
The following figure shows the pickup and feed paper path.
NOTE:Duplex models include a duplex media-feed path for automatic two-sided printing.
Figure 1-30   Pickup, feed, and delivery block diagram
Pressure rollerFuser film
Photosensitive drumTransfer roller
Delivery roller
MP tray pickup roller 
Cassette pickup roller
Simplex media path
Duplex media pathMP tray separation pad
Cassette separation pad
ENWW Tray 1 or Tray 2 39 

Jam detection
The product uses the following sensors to detect the presence of media and to check for jams. If media
does not reach or pass each sensor within a specified time, the ECU determines that a jam has occurred
and alerts the formatter.
NOTE:To find the following components, see Photo sensors and switches on page 34.
● PS2; fuser delivery sensor
● PS4; face-down tray media-full sensor
● PS215; Top-of-Page (TOP) sensor
● PS225; media width sensor
● PS502; duplex media-feed sensor (duplex models...

Additional tray
NOTE:This product supports identical 500-sheet input trays (Tray 3 and Tray 4).
Tray driver PCA
The following figure shows the signals between the DC controller and the tray driver PCA.
Figure 1-31   Tray 3 and Tray 4 driver PCA block diagram
Paper feeder
connector PCB Clutch
Solenoid
Photointerrupter
DC controller
Switch
+24V
Optional paper feeder
ENWW
Additional tray 41 

Paper pickup and feed
NOTE:Tray 3 and Tray 4 are identical 500-sheet input trays.
The following figure shows the pickup and feed paper path (Tray 3 shown).
Figure 1-32   Tray 3 and Tray 4 pickup, feed, and delivery block diagram
Optional paper feeder
separation pad
Optional paper feederfeed roller
Optional paper feeder
pickup roller
42 Chapter 1   Theory of operation ENWW 

Media level and size detection
●PS451; paper feeder media-presence sensor detects if media is present in the tray.
NOTE:
PS451 is used in Tray 3 and Tray 4.
●Media size is detected after the page enters the product. See Cassette paper size detection/
cassette paper detection on page 38
.
Jam detection
● PS8008; paper feeder media-feed sensor detects jams in the paper feeder.
ENWW Additional tray 43 

44 Chapter 1   Theory of operationENWW 

2 Removal and replacement
●Removal and replacement strategy
●
Service approach
●
Removal and replacement procedures
ENWW 45 

Removal and replacement strategy 
General cautions during removal and replacement
This chapter describes the removal and replacement of field-replaceable units (FRUs) only.
Replacing FRUs is generally the reverse of removal. Occasionally, notes and tips are included to provide
directions for difficult or critical replacement procedures.
HP does not support repairing individual subassemblies or troubleshooting to the component level.
WARNING! Turn the product off, wait 5 seconds, and then remove the power...