Ricoh B230 Service Manual

							SM i B790 
Read This First 
Safety and Symbols 
Replacement Procedure Safety 
 
ƒ  Turn off the main power switch and unplug the machine before beginning any of 
the replacement procedures in this manual. 
Symbols Used in this Manual 
This manual uses the following symbols. 
: See or Refer to 
: Screws 
: Connector 
: Clip ring 
: E-ring  
						

							Paper Sensor Removal 
B790 ii  SM 
B790 
TABLE OF CONTENTS 
Read This First............................................................................................................ i 
Safety and Symbols ......................................................................................... i 
Replacement Procedure Safety .................................................................... i 
Symbols Used in this Manual ........................................................................i 
Table of Contents...................................................................................................... ii 
1. Replacement and Adjustment.................................................................... 1 
Paper Sensor Removal ................................................................................... 1 
1-Bin Tray Exit Sensor and LED Control Board............................................... 1 
2. Detailed Descriptions .................................................................3 
Component Layout .......................................................................................... 3 
Mechanical Component Layout .................................................................... 3 
Electrical Component Layout ....................................................................... 3 
Electrical Component Descriptions.................................................................. 4 
Basic Operation ............................................................................................... 5 
 
  
						

							Paper Sensor Removal 
SM 1 B790 
B790 
1 Bin Tray 
1.  REPLACEMENT AND ADJUSTMENT 
1.1 PAPER SENSOR REMOVAL 
 
1. 1-bin-tray 
2.  1-bin sorter unit [A] 
3.  Paper sensor [B] (
 x 1, hook x 3) 
 
1.2  1-BIN TRAY EXIT SENSOR AND LED CONTROL 
BOARD 
 
1. 1-bin tray 
2.  1-bin sorter unit 
3.  Sensor bracket [A] (
 x 1,  x 1). 
4.  Remove the 1-bin tray exit sensor [B] (
 x 1, hook x 4)  
						

							1-Bin Tray Exit Sensor and LED Control Board 
B790 2  SM 
5.  LED control board [C] ( x 1,  x 2)  
						

							Component Layout 
SM 3 B790 
B790 
1 Bin Tray 
2. DETAILED DESCRIPTIONS 
2.1 COMPONENT LAYOUT 
2.1.1  MECHANICAL COMPONENT LAYOUT 
 
1. Exit Roller 
2. Drive Gear 
3. Paper Tray 
4. Paper Sensor 
5. 1-Bin Tray Exit Sensor 
2.1.2  ELECTRICAL COMPONENT LAYOUT 
 
1. Paper Sensor 
2. LED Control Board 
3. 1-Bin Tray Exit Sensor  
						

							Electrical Component Descriptions 
B790 4  SM 
2.2 ELECTRICAL COMPONENT DESCRIPTIONS 
 
Symbol Name Function Index No.
Sensors 
S1  Paper  Detects whether there is paper on the tray.   1 
S2  1-Bin Tray Exit  Detects a paper jam.   3 
PCB 
PCB1 LED Control 
Board Indicates when there is paper in the tray.   2 
  
						

							Basic Operation 
SM 5 B790 
B790 
1 Bin Tray 
2.3 BASIC OPERATION 
At the appropriate time after the leading edge of the first sheet of copy paper reaches the 
copier’s registration roller, the junction gate solenoid turns on to switch the junction gate to 
direct the paper to the 1-bin paper tray. 
The junction gate solenoid turns off at the appropriate time after the paper is directed to 
the 1-bin paper tray. The main motor in the copier stops after the final sheet passes the 1-
bin tray exit sensor and arrives on the tray. 
The paper sensor turns on when there is paper in the tray, and the paper indicator turns 
on. 
The tray can be opened for easier jam removal by swinging the tray to the left. 
  
						

							 
 
 
 
INTERNAL SHIFT TRAY 
B791