Ricoh Mp C3000 Service Manual

							Paper Size Detection 
SM 11 B800 
B800 
Paper Feed  Unit 
2.3 PAPER SIZE DETECTION 
 
There are four paper size switches [A] worki ng in combination. Switch 1 (right end) is for 
tray set detection. The other three switches  detect the paper size as shown in the table 
below. The actuator [B] is  moved by the end plate [C]. 
0: Not pushed, 1: Pushed 
Models  Switch Location 
North America Europe/Asia  SW4  SW3  SW2 
DLT (A3) SEF*1  A3 (DLT) SEF*1 1  1  0 
LG (B4) SEF*2  B4 (LG) SEF*2 1  1  1 
A4 SEF  A4 SEF 0  0  1 
B5 SEF  B5 SEF 0  0  0 
LT (A4) LEF*3  A4 (LT) LEF*3 0  1  1 
B5 (Exe) LEF*4  B5 (Exe) LEF*4 1  0  1 
A5 LEF  A5 LEF 0  1  0 
 
ƒ 
*1:  Detects either DLT SEF or A3 SEF, depending on the setting of SP5-181-7 or 
11 .   
ƒ 
*2:  Detects either LG SEF or B4 SEF, depending on the setting of SP5-181-8 or 
12. 
ƒ 
*3:  Detects either LT LEF or A4 LEF, depending on the setting of SP5-181-6 or 10. 
ƒ *
4:  Detects either Exe LEF or B5 LEF, depending on the setting of SP5-181-9 or 
13 
The machine disables paper feed from a tray if the paper size cannot be detected (if the  
						

							Reverse Roller and Pick-Up Roller Release 
B800 12  SM 
paper size actuator is broken or no tray is installed). 
For non-standard paper sizes, if they are not visible on the user tool screen for selecting 
paper sizes, then set SP 5-112 to 1. If the us er selects one of these sizes, auto paper size 
selection is disabled. 
 
2.4  REVERSE ROLLER AND PI CK-UP ROLLER RELEASE 
 
The pick-up roller and separation roller release  the paper when it is not being fed. This 
helps remove jammed paper easily. 
When the paper tray [A] is not in the machine, the separation roller [B] is away from the 
paper feed roller [C] and the pick-up roller stays in its upper position. 
When the paper tray is pushed into the machi ne, it pushes the release lever [E]. This 
causes the pick-up roller [D] to go down into  contact with the top sheet of paper, and 
causes the reverse roller [B] to mo ve up and contact the paper feed roller.  
						

							Paper Lift 
SM 13 B800 
B800 
Paper Feed  Unit 
2.5 PAPER LIFT 
 
When the machine detects that a tray has been  placed in the machine, the tray lift motor 
[A] rotates and the coupling gear [B] on the tray lift motor engages the pin [C] on the lift 
arm shaft [D]. Then the tray lift arm lifts the  tray bottom plate [E] until the paper lift sensor 
for the tray detects that the top of t he stack is at the paper feed position. 
When the tray is removed from the machi ne, the connection between the coupling gear 
and lift arm shaft is disengaged, and the tray bottom plate lowers.  
						

							Paper Height and End Detection 
B800 14  SM 
2.6 PAPER HEIGHT AND END DETECTION 
2.6.1  PAPER HEIGHT DETECTION 
 
Two paper height sensors [A] [B ] and actuator [C] are built into the paper tray lift motor. 
The paper height sensors, detect  the amount of paper in the tray. 
The actuator [C] has two semicircles, and it is engaged with the lift arm shaft via gears. 
The paper height sensors det ect the paper size depending  on the position of the two 
semicircles. The list shown below shows the detection combination of  the two sensors. 
The paper remaining status bar is displayed in the tray selection icon on the LCD. 
 
Remaining paper  Paper height sensor 1 [A] Paper height sensor 2 [B]  
100% 
(Status bar x 4)  OFF OFF 
70% 
(Status bar x 3)  ON OFF 
30% 
(Status bar x 2)  ON ON 
10% 
(Status bar x 1)  OFF ON 
OFF: No actuator  
						

							Paper Height and End Detection 
SM 15 B800 
B800 
Paper Feed  Unit 
2.6.2 PAPER END AN D BOTTOM PLATE 
 
The paper stack raises the paper end feeler  [A] and the paper end sensor [B] deactivates 
if there is some paper in the paper tray. 
When the paper tray runs out of paper, the paper  end feeler [A] drops into the cutout in the 
tray bottom plate. At this time  the paper end sensor [B] activates 
  
						

							 
LCIT 
B801 
B801  LCT PB3010 
Page Date Added/Updated/New 
      None 
 
  
						

							 
SM i B801 
LCIT B801 
TABLE OF CONTENTS 
1. REPLACEMENT AND ADJUSTMENT ............................................ 1 
1.1  LEFT AND RIGH T TRAY........................................................................\
...... 1  
1.2  SENSORS ........................................................................\
............................ 2  
1.2.1  PAPER HEIGHT SENSORS ON  PAPER STORAGE SIDE................. 2  
1.2.2  END FENCE HP SENSOR/ PAPER END SENSOR 2 ......................... 2  
1.3  CHANGING THE  TRAY SIZE ....................................................................... 3  
1.4  MOTORS ........................................................................\
.............................. 4  
1.4.1  TRAY LIFT  MOTOR........................................................................\
..... 4  
1.4.2  TRAY MOTOR ........................................................................\
............. 5  
1.5  MAIN BOARD ........................................................................\
....................... 6  
1.6  CLUTCHES........................................................................\
........................... 7  
1.6.1  STACK TRANSPOR T CLUTCH .......................................................... 7  
1.6.2  PAPER FEED  CLUTCH ....................................................................... 7  
1.7  PAPER FEED  UNIT ........................................................................\
.............. 8  
1.8  PICK-UP, FEED AND  SEPARATION ROLLERS .......................................... 9  
1.9  PAPER FEED, PAPER END, LI FT AND RELAY SENSORS...................... 10  
2. DETAILED DESCRIPTIONS .......................................................... 11 
2.1  COMPONENT  LAYOUT........................................................................\
..... 11  
2.1.1  MECHANICAL COMPON ENT LAYOUT ............................................ 11  
2.1.2  ELECTRICAL COMP ONENT LAYOUT ............................................. 12  
2.1.3  ELECTRICAL COMPONEN T DESCRIPTIONS ................................. 13  
2.2  PAPER FE ED ........................................................................\
..................... 15  
2.3  SEPARATION ROLLER AND PICK -UP ROLLER RELEASE ..................... 16 
2.4  TRAY LI FT ........................................................................\
.......................... 17  
2.5  PAPER AMOUNT  DETECTION .................................................................. 18  
2.6  PAPER END DETECTION ( PAPER FEED SIDE) ...................................... 19  
2.7  PAPER STACK  TRANSPORT .................................................................... 20