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Ricoh Mp C3000 Service Manual

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    							Pick-up, Feed and Separation Rollers 
SM 9 B801 
B801 LCIT 
1.8  PICK-UP, FEED AND SEPARATION ROLLERS 
 
1.  Paper feed unit (
 Paper Feed Unit) 
2.  Separation roller [A] (
 x 1) 
3.  Roller holder [B] (
 x 1) 
4.  Feed roller [C] and pick-up roller [D]
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    							Paper Feed, Paper End, Lift and Relay Sensors 
B801 10  SM 
1.9  PAPER FEED, PAPER END, LIFT AND RELAY SENSORS 
 
1.  Paper feed unit (
 Paper Feed Unit) 
2.  Vertical transport sensor bracket [A] (
 x 1,  x 1) 
3.  Relay sensor [B] 
4.  Paper feed sensor bracket [C] 
5.  Paper feed sensor [D] 
6.  Paper end feeler [E] 
7.  Paper end sensor holder [F] (hook x 3) 
8.  Paper end sensor [G] (
 x 1, hook x 3) 
9.  Lift sensor (
 x 1, hook x 3)
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    							Component Layout 
SM 11 B801 
B801 LCIT 
2. DETAILED  DESCRIPTIONS 
2.1 COMPONENT LAYOUT 
2.1.1  MECHANICAL COMPONENT LAYOUT 
 
 
1. Pick-up Roller 
2. Paper Feed Roller 
3. Relay Sensor 
4. Separation Roller 
5. Paper Height Sensors 1, 2, 3  6. Lower Limit Sensor 
7. Paper End Sensor 2 
8. End Fence HP Sensor  
9. Paper Height Sensors 4, 5
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    							Component Layout 
B801 12  SM 
2.1.2  ELECTRICAL COMPONENT LAYOUT 
 
 
1. Main board 
2. Stack transport clutch 
3. Tray motor 
4. Paper feed clutch 
5. Pick-up solenoid 
6. Right tray lock solenoid 
7. Vertical guide switch 
8. Lift sensor 
9. Relay sensor  
10. Paper end sensor 1  11. Paper feed sensors 
12. Side fence sensor 
13. Tray lift motor 
14. Paper height sensor 1, 2, 3 
15. Tray set switch 
16. Lower limit sensor 
17. Left tray set switch 
18. End fence HP sensor 
19. Paper end sensor 2 
20 Paper height sensors 4, 5
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    							Component Layout 
SM 13 B801 
B801 LCIT 
2.1.3  ELECTRICAL COMPONENT DESCRIPTIONS 
Symbol  Name Function  Index 
No. 
Motors  
M1  Tray  Drives all rollers.  3 
M2  Tray Lift Drives the paper tray up or down.  13 
Sensors 
S1 Paper Feed Sensor  Detects whether the paper is jammed at 
LCT.  11  
S2 Relay 
Detects the copy paper coming to the relay 
roller and checks for misfeeds.  9 
S3 
Paper End 1 
(paper feed side)  Informs the copier/printer when the paper in 
the right side (paper feed side) of the tray 
has been used up. If there is a paper stack 
in the left side (paper storage side), this is 
moved into the paper feed side. If there is 
no paper stack in the left side, paper end is 
indicated. 
10 
S4 Lift 
Detects when the paper is at the correct 
paper feed height.  8 
S5-S7 
Paper Height 1, 2, 
3  Detects the amount of paper remaining in 
the right side of the tray. 
14 
S8 Lower Limit 
Detects when the tray is completely 
lowered, to stop the LCT motor.  16 
S9  End Fence HP 
Detects when the left fence is at its home 
position  18 
S10 Side Fence Detects whether the side fence is open or 
closed. (The fence opens
 when the left-tray 
paper stack is moving to the paper feed 
side.)  12 
S11 
Paper End 2 
(paper storage 
side)  Informs the copier/printer when there is no 
paper in the left side (paper storage side) of 
the tray. 
19 
S12 
S13 
Paper Height 4, 5 
Detects the amount of paper remaining in 
the left side of the tray.  20 
Switches 
SW1  Vertical Guide  Detects whether the right cover is open.  7 
SW2  Tray Set Switch  Detects whether the tray is correctly set.  15
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    							Component Layout 
B801 14  SM 
Symbol Name Function  Index 
No. 
SW3  Left Tray Set 
Switch  Detects whether the left tray is correctly set.  17 
Magnetic Clutches
 
MC1  Paper Feed  Drives the paper feed roller.  4 
MC2 Stack Transport Drives the rear fence of the paper storage 
side.  2 
Solenoids
 
SOL1  Pick-up   Pushes the pick-up roller up or down.  5 
SOL2  Tray Lock Locks or unlocks the right tray.  6 
PCBs 
PCB1 Main  Controls the LCT and communicates with 
the copier/printer.  1
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    							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 ro ller [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).
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    							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 pu lling 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 cont act with the top sheet of paper and the 
separation roller [B] to move up and contact the paper feed roller.
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    							Tray Lift 
SM 17 B801 
B801 LCIT 
2.4 TRAY LIFT 
 
When the paper feed tray is pushed in the mach ine, 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 st ops lifting the plate 
when the upper limit sensor ac tuator 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, t he 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).
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    							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
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