2-34
Confidential
3.6
Sensors position
Sensor name
Type
Located on
Function
Regist front sensor
Photo sensor
High-voltage PS
PCB
Detect the paper top position
or absence of paper.
Regist rear sensor
Photo sensor
High-voltage PS
PCB
Control the first print
position on the paper.
Paper eject sensor
Photo sensor
Relay rear PCB
Detect whether the paper is
ejected.
New toner sensor
Photo sensor
Relay front PCB
Detect whether a new toner
cartridge is installed.
Detect a new toner cartridge
type.
Toner LED PCB
(Light emission)
Photo sensor
Frame R
Detect whether the toner
cartridge which contains
enough toner.
Toner sensor PCB
(Light reception)
Photo sensor
Frame L
Front cover sensor
Mechanical
switch
Frame L
Detect the opening and
closing of the front cover.
PE sensor
Photo sensor
PE EG sensor ASSY Detect the absence of the
paper in each paper tray.
Edge sensor
Photo sensor
PE EG sensor ASSY
Detect the absence of each
paper tray.
Detect whether the paper is
sent from the tray.
MP PE sensor
Photo sensor
MP PE sensor ASSY Detect the absence of the
paper in the MP tray.
Duplex tray sensor
Mechanical
switch
Relay rear PCB
Detect the opening and
closing of the back cover.
Detect the absence of the
Duplex unit.
Document front
sensor 1
Photo sensor
ADF
Detect the absence of the
paper in the ADF unit.
Document front
sensor 2
Photo sensor
ADF
Detect whether the paper is
drawn.
Document rear
sensor
Photo sensor
ADF
Detect the length of the
paper.
Switch back sensor
Photo sensor
ADF
When the duplex printing,
detect the timing of
reversing of the paper.
Document cover
sensor
(CCD model only)
Photo sensor
ADF
Detect the opening and
closing of the document
cover.
Home position
sensor
Photo sensor
Scanner unit ASSY
Detect the if the scanner
unit ASSY is in the home
position of the CCD unit.
Document eject
sensor
(CIS model only)
Photo sensor
ADF
Detect whether the
document is ejected.
ADF cover open
sensor
(CIS model only)
Mechanical
switch
ADF
Detect the opening and
closing of the ADF cover.
Summary of Contents for DCP 8085DN
Page 13: ...CHAPTER 1 SPECIFICATIONS ...
Page 52: ...Confidential CHAPTER 2 THEORY OF OPERATION ...
Page 69: ...2 16 Confidential 3 3 Paper Feeding Fig 2 18 LT path DX path MP path Paper tray path ...
Page 89: ...CHAPTER 3 ERROR INDICATION AND TROUBLESHOOTING ...
Page 178: ...Confidential CHAPTER 4 PERIODICAL MAINTENANCE ...
Page 248: ...CHAPTER 5 DISASSEMBLY REASSEMBLY ...
Page 265: ...5 12 Confidential Fig 5 7 EM2 4 places Separation pad ASSY ...
Page 501: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 507: ...6 5 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 516: ...CHAPTER 7 SERVICE MODE ...
Page 525: ...7 7 Confidential For color scanning Fig 7 2 ...
Page 527: ...7 9 Confidential For white and black scanning Fig 7 3 ...
Page 528: ...7 10 Confidential For color scanning Fig 7 4 ...
Page 567: ...Confidential CHAPTER 8 CIRCUIT DIAGRAMS WIRING DIAGRAM ...
Page 569: ...8 1 Confidential 1 CIRCUIT DIAGRAMS High voltage Power Supply PCB Circuit Diagram Fig 8 1 ...
Page 570: ...8 2 Confidential LVPS PCB Circuit Diagram 230V Fig 8 2 ...
Page 571: ...8 3 Confidential LVPS PCB Circuit Diagram 115V Fig 8 3 ...