HP P3015 Service Manual

Configuration page .......................................................................................... 172
Print quality troubleshooting tools .................................................................................... 173 Repetitive image-defect ruler .......................................................................... 173
Control-panel menus ....................................................................................................... 174 Use the menus...

Transparencies or glossy paper will not feed .................................................................. 244
Envelopes jam or will not feed in the product .................................................................. 245
Output is curled or wrinkled ............................................................................................. 245
Product does not duplex or duplexes incorrectly (duplex models) .................................. 246
Solve image-quality problems...

Assembly locations ........................................................................................................................... 272
Base product (no optional trays  or accessories) .............................................................. 272
Base product (optional trays or  accessories) ................................................................... 273
Covers ...........................................................................................................................

Single returns ................................................................................. 314
Shipping .......................................................................................... 314
Non-U.S. returns .............................................................................................  314
Paper ......................................................................................................................... ......  314
Material restrictions...

1 Theory of operation
●Basic operation
●
Formatter-control system
●
Engine-control system
●
Image-formation system
●
Pickup, feed, and delivery system
●
Tray 1 or Tray 2
●
Additional tray
ENWW 1 

Basic operation
Major printer systems
The product contains the following five systems:
●Engine-control system
● Laser/scanner system
● Image-formation system
● Media feed system
● Option
Printer block diagram
Figure 1-1
  Printer block diagram
MEDIA FEED SYSTEM
LASER SCANNER SYSTEM
ENGINE CONTROL SYSTEM IMAGE-FORMATION SYSTEM
OPTION
2 Chapter 1   Theory of operation ENWW 

Sequence of operation
The DC controller in the engine-control system controls the operational sequences of the printer. The
table below describes durations and operations for each period of a print operation from when the printer
is turned on until the motor stops rotating
Normal sequence of operation
Table 1-1  Sequence of operation
NameTimingPurpose
WAITFrom the time the power switch is turned on or the
door is closed until the printer is ready for a print
operation.Brings the product to printable...

Formatter-control system
The formatter is responsible for the following procedures:
●Controlling sleep mode
● Receiving and processing print data from the various product interfaces
● Monitoring control-panel functions and relaying product-status information (through the control
panel and the network or bidirectional interface)
● Developing and coordinating data placement and timing with the DC controller PCA
● Storing font information
● Communicating with the host computer through the network or the...

Memory
The random access memory (RAM) on the formatter PCA contains the page, I/O buffers, and the font
storage area. It stores printing and font information received from the host system, and can also serve
to temporarily store a full page of print-image data before the data is sent to the print engine. Memory
capacity can be increased by adding a DIMM to the formatter. Note that adding memory might also
increase the print speed for complex graphics.
NOTE:If the product encounters a problem when...

Engine-control system
The engine-control system coordinates all product functions, according to commands that the formatter
sends. The engine-control system drives the laser/scanner system, the image formation system, and
the pickup/feed/delivery system.
The engine control system contains the following major components:
●Engine-control unit (ECU)
◦DC controller
◦ Low-voltage power supply
● High-voltage power supply
Figure 1-2   Engine-control system
Engine controller
DC controller
High-voltage
power...