Ricoh B230 Service Manual

							Paper Transport and Paper Reverse/Exit Motors 
SM 9 B792 
B792 
Finisher 
1.9 PAPER TRANSPORT AND PAPER 
REVERSE/EXIT MOTORS 
 
1.  Rear cover (
 Rear Cover) 
2.  Harness guide [A] (hook x 3) 
3.  Control board [B] (
 x 2, All s) 
 
4.  Paper transport motor bracket [C] (
 x 2, spring x 1,  x 1) 
5.  Paper transport motor [D] (
 x 2) 
6.  Paper reverse/exit motor bracket [E] (
 x 2, spring x 1,  x 1) 
7.  Paper reverse/exit motor [F] (
 x 2)  
						

							Output Tray Unit 
B792 10  SM 
1.10  OUTPUT TRAY UNIT 
 
1. Output tray (
 Main Frame) 
2.  Output tray cover [A] (
 x 2) 
3.  Tray holder [B] (
 x 1) 
4.  Connector cover [C] 
5.  Output tray motor link unit [D] (
 x 1) 
6.  Rear cover [E] (
 x 1) 
7.  Output tray motor [F] (
 x 1) 
 
 
ƒ  When re-attaching the motor link unit, the arrows on each of the gears need to 
face each other as shown in the illustration.  
						

							Overall Machine Information 
SM 11 B792 
B792 
Finisher 
2. DETAILED  DESCRIPTIONS 
2.1 OVERALL MACHINE INFORMATION 
2.1.1 COMPONENT LAYOUT 
Mechanical Component Layout 
 
 
1. Output tray 
2. Stack height detection lever 
3. Stack height lever solenoid 
4 .Stapler unit movement motor 
5. Stapler unit 6. Entrance sensor 
7. Entrance roller 
8. Belt unit 
9. Pick-up roller  
10. Paddle roller 
  
						

							Overall Machine Information 
B792 12  SM 
Drive Layout 
 
 
1. Paper transport motor 
2. Pick-up roller motor 
3. Output tray motor 
4. Output tray link gears 5. Stapler unit movement motor 
6. Pick-up roller contact motor 
7. Paddle roller 
8. Pick-up roller 
  
						

							Overall Machine Information 
SM 13 B792 
B792 
Finisher 
2.1.2  ELECTRICAL COMPONENT LAYOUT 
 
 
1. Lever Sensor 
2. Paddle Roller Solenoid 
3. Stack Height Sensor 
4. Stack Height Lever Solenoid 
5. Stapler Unit HP Sensor 
6. Stapler Unit Movement Motor 7. Pick-Up Roller Contact Motor 
8. Cover Switch 
9. Pick-Up Roller HP Sensor 
10. Top Cover Sensor 
11. Stapler Safety Sensor 
12. Entrance Sensor 
  
						

							Overall Machine Information 
B792 14  SM 
 
 
13. Belt Lift Sensor 
14. Paper Transport Motor 
15. Pick-up Roller Motor 
16. Control Board 
17. Output Tray Motor 
18. Stack Near-limit Sensor 
19. Tray Upper Limit Sensor 20. Front Jogger Fence HP Sensor 
21. Front Jogger Motor 
22. Rear Jogger Fence HP Sensor 
23. Rear Jogger Motor 
24. Jogger Position Sensor 
25. Belt Lift Solenoid 
  
						

							Detailed Section Descriptions 
SM 15 B792 
B792 
Finisher 
2.2 DETAILED SECTION DESCRIPTIONS 
2.2.1  OUTPUT TRAY MECHANISM 
Stack Height Detection 
 
Stack height detection lever [A]: Driven by stack height lever solenoid [B].  
Two sensors detect the height of the stack in the output tray: the stack height [C] and lever 
[D] sensors. 
Stack height 
sensor Lever 
sensor Status 
Off Off The stack height is below the target. The output tray 
is then lifted to the target position. 
Off  On  Target stack height position 
On On The stack height is above the target. The output tray 
is then lowered to the target position. 
On  Off  The stack height detection lever is at home position. 
Off: Actuator not in sensor 
At the start of a print job, the solenoid turns off. The stack height detection lever comes 
down, to detect the current stack level.  
When a sheet of paper is being fed out, the solenoid turns on and the lever goes back up 
to home position (inside the unit). After paper has been fed out, the solenoid turns on 
again, and the lever detects the level of the stack.  
						

							Detailed Section Descriptions 
B792 16  SM 
Output Tray Up/Down Mechanism 
 
Overview 
The output tray motor gear [A] lifts/lowers the tray if the stack height is not at the target 
position.  
Gears [B] and [C] keep the angle of the tray constant at any tray position. 
Output Tray Downward Movement 
The top of the paper stack is checked after every page (or set of pages) has been fed out. 
If the top of the stack is higher than the target level, the output tray motor moves the tray 
down. 
When the stack near-limit sensor [D] detects the actuator on gear [C], a stack near-limit 
signal is transferred to the main frame. The tray cannot move any lower. The next time the 
top of the stack height is above the target level, printing stops. 
Output Tray Upward Movement 
If paper is removed from the stack, the top of the stack will be lower than the target level, 
and the output tray motor moves the tray up.  
When the tray upper limit sensor [E] detects the actuator on gear [B], the tray cannot be 
moved up any more, so the motor stops.  
						

							Detailed Section Descriptions 
SM 17 B792 
B792 
Finisher 
2.2.2 PAPER FEED 
 
When a sheet of paper is fed, it is transported through the 500-sheet finisher as shown in 
these drawings. 
To feed paper straight through the finisher, the pick-up roller [A] stays up.  
To send the paper to the jogger tray [B], when the trailing edge is almost out of the finisher, 
the pick-up roller moves down until the reverse/exit roller in the pick-up roller pushes the 
paper against the paddle roller [C]. The reverse/exit roller feeds the paper to the jogger 
tray. 
The pick-up roller is lifted up and down by the pick-up roller contact motor. 
The pick-up roller feeds the paper out after stapling, sorting, or stacking. 
The reverse/exit motor controls the reverse/exit motor. The other rollers do not change 
direction, and are controlled by the paper transport motor.  
						

							Detailed Section Descriptions 
B792 18  SM 
2.2.3 JOGGER MOVEMENT 
 
The jogger tray unit consists of the front [A] and rear [B] jogger fences, two jogger motors 
[C] and two jogger fence HP sensors [D].  
Standby mode:  
The jogger fences are placed at home position. 
Sort mode: 
The joggers move alternate sets to the front and rear, to separate the sets for the users. 
At the start of the job, the jogger fences move to the front and rear sides. 
When the first set of the job is fed to the jogger tray, the front jogger fence moves towards 
the rear to stack the paper neatly. 
When the second set of the job is fed, the rear jogger fence moves towards the front to 
stack the paper neatly. 
The front and rear fences continue to operate like this for alternate sets, until the end of 
the job. 
Staple mode: 
Only the front jogger fence moves in staple mode.