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Ricoh B230 Service Manual

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    							Lift, Paper End, and Relay Sensors 
SM 7 B800 
B800 
Paper Fed 
Unit 
1.6 LIFT, PAPER END, AND RELAY SENSORS 
 
1.  Paper feed unit (
 Paper Feed Unit) 
2.  Vertical transport sensor bracket [A] (
 x 1) 
3.  Vertical transport sensor [B] (
x 1) 
4.  Paper feed sensor bracket [C] (
 x 1) 
5.  Paper feed sensor [D] (
 x 1) 
6.  Paper end sensor filler [E] 
7.  Paper end sensor [F] (
 x 1) 
8.  Lift sensor [G] (
 x 1)
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    							Component Layout 
B800 8  SM 
2. DETAILED  DESCRIPTIONS 
2.1 COMPONENT LAYOUT 
2.1.1  MECHANICAL COMPONENT LAYOUT 
 
 
1. Upper tray 
2. Paper size switch: Upper tray 
3. Pick-up roller: Upper tray 
4. Paper feed roller 
5. Vertical transport roller 6. Separation roller 
7. Tray lift arm 
8. Lift arm shaft 
9. Bottom plate  
10. End plate 
 
ƒ  Listed above are the components of tray 1 (upper tray). Tray 2 (lower tray) has 
the same components as tray 1.
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    							Component Layout 
SM 9 B800 
B800 
Paper Fed 
Unit 
2.1.2  ELECTRICAL COMPONENT LAYOUT 
 
 
1. Main board 
2. Feed motor 
3. Upper tray lift motor 
4. Lower tray lift motor 
5. Upper lift sensor 
6. Upper paper feed clutch 
7. Pick-up solenoid 8. Lower paper feed clutch 
9. Vertical transport guide switch 
10. Paper end sensor 
11. Vertical transport sensor 1 
12. Paper feed sensor 
13. Paper size switch: Lower tray 
14. Paper size switch: Upper tray 
 
ƒ  Listed above are the components of tray 1 (upper tray), except for the right cover 
switch and anti-condensation heater (there is only one each of these for the entire 
unit). Tray 2 (lower tray) has the same components as tray 1.
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    							Paper Feed 
B800 10  SM 
2.2 PAPER FEED 
 
Paper Feed Mechanism 
An FRR (feed and reverse roller) feed mechanism is used (
 Paper Feed Methods in 
the Core Technology Manual). 
Drive Path 
Tray 3 (upper tray) and tray 4 (lower tray) have identical paper feed systems. The feed 
motor [A] drives all the rollers in the unit. The paper feed clutch [B] controls the pick-up 
roller [C], paper feed roller [D], and separation roller [E].
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    							Paper Size Detection 
SM 11 B800 
B800 
Paper Fed 
Unit 
2.3 PAPER SIZE DETECTION 
 
There are four paper size switches [A] working 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
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    							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 user selects one of these sizes, auto paper size 
selection is disabled. 
 
2.4  REVERSE ROLLER AND PICK-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 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 
causes the reverse roller [B] to move up and contact the paper feed roller.
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    							Paper Lift 
SM 13 B800 
B800 
Paper Fed 
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 the stack is at the paper feed position. 
When the tray is removed from the machine, the connection between the coupling gear 
and lift arm shaft is disengaged, and the tray bottom plate lowers.
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    							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 detect 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
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    							Paper Height and End Detection 
SM 15 B800 
B800 
Paper Fed 
Unit 
2.6.2 PAPER END AND 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
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