Ricoh ps450 SPECIFICATIONS
PAPER TRAY UNIT
(Machine Code: B384)
20 February, 2001 |
MECHANICAL COMPONENT LAYOUT |
1. OVERALL MACHINE INFORMATION
1.1 MECHANICAL COMPONENT LAYOUT
|
5 |
1 |
|
|
|
|
|
2 |
3 |
|
|
4 |
|
|
7 |
|
6 |
|
|
B384V101.WMF |
1. |
Upper Paper Feed Roller |
5. |
Upper Bottom Plate |
2. |
Lower Paper Feed Roller |
6. |
Lower Bottom Plate |
3. |
Upper Tray |
7. |
Optional Tray Heater |
4. |
Lower Tray |
|
|
Peripherals
B384-1
ELECTRICAL COMPONENT LAYOUT |
20 February, 2001 |
1.2 ELECTRICAL COMPONENT LAYOUT
1
20
19 |
18 |
2
3
4
5
6
7 |
8 |
9
17 |
|
10 |
16 |
|
11 |
|
|
12 |
15 |
14 |
13 |
|
B384V102.WMF |
|
|
|
1. |
Tray Main Board |
11. Lower Paper Height 1 Sensor |
|
2. |
Upper Lift Sensor |
12. |
Vertical Transport Sensor |
3. |
Upper Lift Motor |
13. |
Upper Paper End Sensor |
4. |
Upper Paper Height 2 Sensor |
14. Lower Paper End Sensor |
|
5. |
Upper Paper Height 1 Sensor |
15. Lower Paper Size Switch |
|
6. |
Upper Paper Feed Clutch |
16. Upper Paper Size Switch |
|
7. |
Relay Clutch |
17. |
Optional Tray Heater |
8. |
Tray Cover Switch |
18. |
Lower Lift Motor |
9. |
Lower Paper Feed Clutch |
19. |
Lower Lift Sensor |
10. Lower Paper Height 2 Sensor |
20. Paper Feed Motor |
||
B384-2
20 February, 2001 |
DRIVE LAYOUT |
1.3 DRIVE LAYOUT
1
2
3 8 
4
5 |
6
7
B384V103.WMF
1. |
Paper Feed Motor |
5. |
Lower Paper Feed Clutch |
2. |
Drive Belt |
6. |
Relay Roller |
3. |
Upper Paper Feed Clutch |
7. |
Lower Paper Feed Roller |
4. |
Relay Clutch |
8. |
Upper Paper Feed Roller |
Peripherals
B384-3
PAPER FEED AND SEPARATION MECHANISM |
20 February, 2001 |
2. DETAILED DESCRIPTIONS
2.1 PAPER FEED AND SEPARATION MECHANISM
[A] |
[B] |
[C]
B384D104.WMF
Each paper tray holds 500 sheets. The paper feed roller [A] drives the top sheet of paper from the paper tray to the copier/printer. The friction pad [B] allows only one sheet to feed at a time. The friction pad applies pressure to the feed roller with a spring [C].
B384-4
20 February, 2001 |
PAPER LIFT MECHANISM |
2.2 PAPER LIFT MECHANISM
[B]
[A]
[D] |
|
|
|
[C] |
|
[F] |
|
[K] |
[G] |
||
|
[H]
[A]
B384D106.WMF |
[E] |
[B] |
|
|
[I] 
[J] 
[C]
[D]
[E]
B384D107.WMF
The paper size switch detects when the tray is pushed in.
When the paper tray is pushed into the machine, the pin [A] for the lift motor pressure shaft engages the lift motor coupling [B] and the pin [C] for the bottom plate lift shaft in the tray engages the bottom plate pressure lever coupling [D]. The pin [E] on the rear of the tray pushes the lock lever so that the lift motor can lift the bottom plate pressure lever.
The lift motor turns on, and turns clockwise as viewed on the lower diagram. The main pressure spring [K] pulls the bottom plate pressure lever, and this lifts the tray bottom plate.
When the top of the stack touches the feed roller, the motor cannot pull up the plate any more, so it pulls the actuator [G] into the lift sensor [F].
The pressure of the feed roller on the paper is now too high, so the lift motor reverses to reduce this pressure. It reverses for 300 ms or 600 ms, depending on the paper size. For smaller paper, it reverses the larger amount (600 ms) to reduce the pressure more.
Peripherals
B384-5
Loading...