Ricoh B230 Service Manual

							Paper Feed 
SM 15 B801 
B801 
LCIT 
2.2 PAPER FEED 
 
This products uses an FRR type paper feed mechanism.  
The paper feed unit consists of the pick-up roller [A], paper feed roller [B], separation roller 
[C], and relay rollers.  
There is a torque limiter in the back of the separation roller (ferrite powder type).  
						

							Separation Roller and Pick-Up Roller Release 
B801 16  SM 
2.3  SEPARATION ROLLER AND PICK-UP ROLLER 
RELEASE 
 
To prevent the paper from being torn when pulling out the paper feed tray, the separation 
and pick-up rollers release automatically. 
When the paper tray [A] is not inside the machine, the separation roller [B] is away from 
the paper feed roller [C], and the pick-up roller [D] stays in the upper position. 
When the paper tray is set into the machine, 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 the 
separation roller [B] to move up and contact the paper feed roller.  
						

							Tray Lift 
SM 17 B801 
B801 
LCIT 
2.4 TRAY LIFT 
 
When the paper feed tray is pushed in the machine, the tray switch on the back turns on 
and the tray lift motor [A] starts. The base plate lift shaft [B] is coupled to the lift motor at 
the shaft [C], so the base plate [D] of the tray is lifted. After a short while, the top of the 
paper stack contacts the pick-up roller and lifts it up. Then the motor stops lifting the plate 
when the upper limit sensor actuator enters the sensor (
Electrical Component 
Layout). 
When paper in the tray is used up, the pick-up roller is gradually lowered, and the actuator 
leaves the lift sensor [E]. When this happens, the lift motor begins turning again. The tray 
will then be lifted until the actuator enters the upper limit sensor again). 
When the tray is removed from the copier, the coupling between the lift motor [A] and base 
plate lift shaft [B] is broken and the base plate goes into a controlled free fall (using a 
damper to slow the fall and prevent damage).  
						

							Paper Amount  Detection 
B801 18  SM 
2.5 PAPER AMOUNT DETECTION 
The table lists the sensors that are used to detect the amount of remaining paper. 
Right Tray (Paper feed side) 
ƒ  Paper end sensor 1 
ƒ  Paper height sensor 1 to 3 
Left Tray (Paper storage side) 
ƒ  Paper height sensor 4 and 5 
ƒ  Paper end sensor 2 
Right Tray 
Paper Height Sensor 
Amount of paper 
1 2 3 Paper End 
Sensor Display No. of 
Line 
100%  OFF OFF OFF  ON  4 
70% OFF OFF ON ON  3 
30% OFF ON -  ON  2 
10% ON - -  ON  1 
Paper End  - - -  OFF  0 
 
Left Tray 
Paper Height 
Sensor 
Amount of paper 
4 5 Paper End 
Sensor Display No. of 
Line 
100% OFF OFF OFF  4 
70% ON OFF OFF  3 
30% ON ON OFF  2 
Paper End  ON  ON  ON  0 
  
						

							Paper End Detection (Paper Feed Side) 
SM 19 B801 
B801 
LCIT 
2.6  PAPER END DETECTION (PAPER FEED SIDE) 
 
The paper end sensor 1 [A] detects when copy paper in the paper feed side runs out. 
When there is paper in the tray, the paper pushes up the feeler [B] and the actuator enters 
the sensor. When paper runs out, the feeler drops in to cutout [C] and the actuator leaves 
the sensor, and the machine detects that there is no paper in the tray.  
						

							Paper Stack Transport 
B801 20  SM 
2.7 PAPER STACK TRANSPORT 
 
When the paper in the paper feed side is used up, the tray motor [A] and stack transport 
clutch [B] turn on. Then the end fence [C] moves the stack of paper from the paper 
storage side to the paper feed side. 
 
ƒ  During paper feed, the stack transport clutch (
 Electrical Component Layout) 
does not switch on, so drive from the tray motor only transfers to the relay roller 
and not to the fence mechanism. 
While the stack is in motion, it pushes the side fence [D] aside, and the side fence sensor 
[E] detects that the fence is open.  
After the stack has been moved all the way across, a spring in the side fence moves the 
side fence back, and the side fence sensor detects that the fence is closed. Then, the tray 
motor reverses until end fence home position sensor [F] is deactivated.