Ricoh B230 Service Manual

 
SM 6-63 B230/B237 
Detailed 
Descriptions 
The by-pass tray has the separation pad system. The by-pass feed roller and separation 
pad [F] feed the top sheet of paper stack. 
6.10.12 BY-PASS PAPER SIZE DETECTION 
 
There are two paper side plates [A] on the by-pass tray. These connect with the paper size 
sensor [B] through a rack-and-pinion mechanism.  

 
B230/B237 6-64  SM 
6.11 FUSING 
6.11.1 OVERVIEW 
 
 
1. Thermopile 
2. Tension roller 
3. Fusing roller 
4. Pressure roller 
5. Lubricant roller 
6. Cleaning roller 
7. Pressure roller fusing lamp 8. Pressure roller thermostat 
9. Pressure roller thermistor 
10. Fusing belt 
11. Heating roller 
12. Heating roller fusing lamps 
13. Heating roller thermostats 
14. Heating roller thermistor 
 
ƒ  A belt fusing system is used. This has a faster warm-up time than a conventional fusing 
and pressure roller...

 
SM 6-65 B230/B237 
Detailed 
Descriptions 
ƒ  Temperature is normally controlled by turning the fusing lamps on and off.   
ƒ  The lubricant roller supplies a small amount of oil to the pressure roller through the 
cleaning roller. An oil supply unit is not necessary because the amount of oil supplied 
to the pressure roller is small. 
6.11.2  FUSING UNIT DRIVE 
 
Belt and Rollers 
The fusing/paper exit motor drives the pressure roller [A] and the fusing roller [B] through 
the gear train, timing belt...

 
B230/B237 6-66  SM 
6.11.3  PRESSURE RELEASE MECHANISM 
 
The pressure levers [A] put the proper pressure to the nip between the pressure roller [B] 
and fusing belt [C]. When releasing these levers, the pressure roller moves away from the 
fusing belt. If a paper jam occurs in the fusing unit, releasing these levers make jammed 
paper easily removed.   
6.11.4 FUSING TEMPERATURE CONTROL 
Components 
 
[A]: Thermostat 
[B]: Thermopile 
[C]: Thermostat  

 
SM 6-67 B230/B237 
Detailed 
Descriptions 
[D]: Thermistor (non-contact) 
[E]: Thermistor (contact) 
[F]: Thermostat 
[G]: Pressure roller fusing lamp 
[H]: Heating roller fusing lamps 
Fusing Temperatures 
When the main switch turns on, the CPU turns on the fusing lamp. The lamp stays on until 
the thermistor detects the standby temperature. Then the CPU raises the temperature to 
the printing temperature. 
The fusing temperature for each mode is as follows. These are set by SP 1105. 
Mode Temperature...

 
B230/B237 6-68  SM 
Mode Temperature of Heating Roller 
(°C) 
Temperature of Pressure 
Roller (°C) 
Thick 2 paper    175 (SP1105-054, -055)  -- 
Thick 3 paper (full 
color) 180 (SP1105-089)  -- 
Thick 3 paper 
(black-and-white) 170 (SP1105-090)  -- 
OHP (full color)  175 (SP1105-056)  -- 
OHP 
(black-and-white) 165 (SP1105-057)  -- 
Special paper  165 (SP1105-058 to -080)  -- 
 
- Paper Weights - 
ƒ  Thin paper: Below 60 g/m
2 (16 lb) 
ƒ  Normal plain paper: 60 – 81 g/m
2 (16 – 22 lb.) 
ƒ  Middle...

 
SM 6-69 B230/B237 
Detailed 
Descriptions 
226 mm is reduced by 5°C after 30 seconds, and again reduced by 5°C after 60 
seconds. 
Overheat Protection 
The CPU cuts power to the fusing lamp at the following times: 
ƒ  The heating roller or pressure roller temperature becomes higher than 230°C for one 
second or more   
SC 543 and SC 553 for the heating roller or SC 563 for the pressure roller show for this 
condition. 
ƒ  The heating roller or pressure roller temperature reaches 250°C. 
SC 544 and SC...

 
B230/B237 6-70  SM 
6.11.5 ENERGY SAVER MODES 
Overview 
 
When the machine is not being used, the energy saver function reduces power 
consumption by decreasing the fusing temperature. 
This machine has the following two types of energy saver modes: 
1. Panel-off mode  
2.  Auto Off mode 
These modes are controlled by the following UP and SP modes: 
ƒ  Panel off timer: User Tools – System Settings – Timer Setting – Panel Off Timer 
ƒ  Auto off timer: User Tools – System Settings – Timer Setting – Auto...

 
SM 6-71 B230/B237 
Detailed 
Descriptions 
temperatures indicated in the table at the bottom of the page. The operation panel 
indicators are turned off except for the Energy Saver LED and the Power LED.   
If the controller receives an image print out command from an application program (e.g. to 
print incoming fax data or to print data from a PC), the temperature of each fusing lamp 
rises to print the data.   
Return to stand-by mode 
The machine returns to stand-by mode if one of the following is...

 
B230/B237 6-72  SM 
ƒ  The ARDF is open 
Off Stand-by mode 
The system +5V is still supplied to all components. When the machine detects a ringing 
signal or receives a stream of data for a print job, the +24V supply is activated. At this time 
the machine automatically prints the incoming message or executes the print job. 
Off Mode 
The system +5V supply also turns off. However, +5VE (+5V for energy saver mode) is still 
activated. When the machine detects a ringing signal, off-hook signal, or...