Figure 5-6 shows the locations of the photosensors, switches, solenoid, and other important printer elements. Table 5-1 describes the function of each photosensor and the solenoid.

PS204 (5L only)

Pick-up Roller Assembly

SW101

Laser Scanner

PS202

PS203

SL1

 

 

 

 

 

 

Heating Element

 

Drive Unit

 

 

 

 

 

 

Main Motor

 

 

DC Controller

 

 

 

 

 

 

 

 

Formatter

SW201

PS201

 

 

 

 

 

Figure 5-6

Solenoid and sensors

 

 

 

 

Table 5-1 Solenoid and sensors

 

 

 

 

 

 

 

 

 

 

Number

 

Name

 

Description

 

 

 

 

 

 

 

SL1

 

Paper Pick-up Solenoid

 

Enables the Paper Pickup Roller.

 

 

 

 

 

 

 

PS201

 

Paper Exit Sensor

 

Senses when paper has successfully

 

 

 

 

 

moved out of the fusing area and the next

 

 

 

 

 

sheet of paper can be fed.

 

 

 

 

 

 

 

PS202

 

Paper Out Sensor

 

Senses no paper in either the Paper Input

 

 

 

 

 

Tray or Manual Input Slot. If this sensor

 

 

 

 

 

does not sense paper in the Input Paper

 

 

 

 

 

Tray or the Single-Sheet Input Slot, the

 

 

 

 

 

formatter displays the paper-out indication

 

 

 

 

 

on the Control Panel. Paper must be

 

 

 

 

 

reloaded before printing can resume.

 

 

 

 

 

 

 

PS203

 

Paper Registration Sensor

 

Detects the leading and trailing edges of

 

 

 

 

 

the paper. Synchronizes the photosensitive

 

 

 

 

 

drum and the top of the paper.

 

 

 

 

 

 

PS204

 

Door Open/Cartridge Sensor (HP LaserJet

Detects whether printer door is open and

 

 

 

5L only) In the HP LaserJet 6L, SW101

cartridge is in place. If the door is open or

 

 

 

performs the function of 5L’s PS204. The

the cartridge is not in place, the control

 

 

 

6L Pro has no toner cartridge sensor.

panel LEDs will display an error message.

 

 

 

 

 

Printing cannot continue until the door is

 

 

 

 

 

closed and the cartridge is in proper

 

 

 

 

 

position.

 

 

 

 

 

 

 

 

64 Functional overview

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