Ricoh Mp C3000 Service Manual

 
SM 6-1 B230/B237/D042 
Detailed 
Descriptions 
6.  DETAILED SECTION DESCRIPTIONS 
6.1 OVERVIEW 
6.1.1 COMPONENT LAYOUT 
 
 
1. Scanner HP sensor 
2. ADF exposure glass 
3. 2nd scanner (2nd carriage) 
4. Exposure glass 
5. Original width sensor 
6. Scanner lamp 
7. 1st scanner (1st carriage) 
8. Original length sensor 
9. Lens block  14. Paper transfer roller 
15. Registration roller 
16. By-pass feed table 
17. Tray 2 
18. Tray 1 
19. Toner collection bottle 
20. Laser optics housing unit 
21. PCU (4...

 
B230/B237/D042 6-2 SM 
10. Sensor board unit (SBU) 
11. Scanner motor   
12. Fusing unit 
13. Duplex unit 23. Image transfer belt unit 
24. Toner bottle (4 colors) 
25. ID sensor 
 
6.1.2 PAPER PATH 
This diagram shows the copier with the 1000-sheet booklet finisher. 
 
1. Original tray 
2. Original exit tray 
3. Duplex inverter 
4. Duplex feed 
5. By-pass tray feed 
6. Tray 1 feed 
7. Tray 2 feed  8. Tray 3: Optional paper feed unit/LCT 
9. Tray 4: Optional paper feed unit 
10. Finisher stapler...

 
SM 6-3 B230/B237/D042 
Detailed 
Descriptions 
6.1.3 DRIVE LAYOUT 
 
 
1. Scanner motor:  Drives the scanner unit. 
2. Drum drive 
motor-CMY:  Drives the drums for magenta, cyan, and yellow. 
3.ITB (Image Transfer 
Belt) contact motor: Moves the ITB into contact and 
away from the color PCUs. 
4. Toner transport motor: Drives the toner attraction pumps
 and the toner collection coils 
from the PCUs, from the trans fer belt unit, and inside the toner 
collection bottle. Also rotates the toner bottles....

 
B230/B237/D042 6-4 SM 
7. Paper feed clutch  Switches the drive power between the tray 1 and tray 2. 
8. Paper feed motor:  Drives the paper feed mechanisms (tray 1/tray 2/by-pass tray). 
9. Drum/Development 
drive motor-K: Drives the black drum and development unit. 
10. Registration motor:  Drives the registration roller. 
11. Paper transfer 
contact motor Moves the paper transfer roller in contact with the image 
transfer belt. 
12. ITB drive motor:  Drives the image transfer belt unit. 
13....

 
SM 6-5 B230/B237/D042 
Detailed 
Descriptions 
control the following functions: 
ƒ Engine sequence 
ƒ Engine operation 
ƒ  Polygon motor control 
ƒ Image processing 
Controller:  
The controller connects to the BICU through a PCI bus. The controller handles the 
following functions: 
ƒ Machine-to-host interface 
ƒ  Operation panel interface 
ƒ Network interface 
ƒ  Interfacing and control of  the optional IEEE1284, Bluetooth, IEEE1394, IEEE802.11b 
(wireless LAN), USB Host, HDD, and DRAM DIMM 
LD Drive...

 
B230/B237/D042 6-6 SM 
6.1.5 PRINTING PROCESS 
 
This machine uses four PCUs, and four laser  beams for color printing. Each PCU consists 
of the drum unit and the development unit. Ea ch drum unit has a drum, charge roller, 
cleaning brush, and blade. From the left, the  PCU stations are yellow, cyan, magenta, and 
black. 
The drum [A] is charged with a negative voltage,  and is exposed by the laser from the laser 
optics housing unit [B]. The laser neutralizes  the negative charge on the surface of...

 
SM 6-7 B230/B237/D042 
Detailed 
Descriptions 
5.  Cleaning for OPC drum : The cleaning brush and blade remove remaining toner on 
the drum surface after image transfer to the paper. 
6.  Quenching for OPC drum:  Quenching is done by illuminat ing the whole area of the 
drum with the laser at the end of every job. 
7.  Cleaning and quenching for transfer belt:  The cleaning brush and blade clean the 
belt surface. The grounding roller inside t he transfer belt unit removes the remaining 
charge on the...

 
B230/B237/D042 6-8 SM 
6.2 PROCESS CONTROL 
6.2.1 OVERVIEW 
This machine has the following two forms of process control: 
ƒ Potential control 
ƒ  Toner supply control 
The following machine components are used for process control: 
ƒ  Four ID (image density) sensors  (black, magenta, cyan and yellow).   
ƒ TD sensor. 
Normally, process control is not disabled. If  process control is disabled, fixed supply mode 
is used for toner supply, and the  VREF stored in SP 3222 is used. 
6.2.2 POTENTIAL CONTROL...

 
SM 6-9 B230/B237/D042 
Detailed 
Descriptions 
ΔRH = RH (Relative Humidity) change between the  relative humidity of the previous 
process control and the current relative humidity 
ΔAH = AH (Absolute Humidity) change between  the absolute humidity of the previous 
process control and the cu rrent absolute humidity 
1.  Manual execution (forced): This is done when SP3-011-1 is used. 
2. Initial  This starts automatically when the power is  turned on, or, when the machine recovers 
from energy saver...

 
B230/B237/D042 6-10 SM 
5.  In standby mode   
This is done automatically if one  of these conditions occurs.   
ƒ a)  ΔT is greater than or equal to Tem perature Threshold (SP3-531-002: 10° C) 
ƒ b)  ΔRH is greater than or equal to Relative  Humidity Threshold (SP3-531-003: 
50%RH) 
ƒ c)  ΔAH is greater than or equal to Absolute  Humidity Threshold (SP3-531-004: 6 
g/m3) 
ƒ  d) Non-use Time is greater than or equal to SP3-531-001 (default: 6 hours) 
It is not done if the machine is in energy saver...