Ricoh Mp C3000 Service Manual

 
SM 6-51 B230/B237/D042 
Detailed 
Descriptions 
6.9.2  PAPER TRANSFER AND SEPARATION 
Overview 
 
 
1. Paper transfer roller 
2. Discharge plate 
3. ITB drive roller  4. Image transfer roller 
5. Image transfer belt 
6. OPC drum 
 
The paper transfer unit consists of the paper tr
ansfer roller and discharge plate. This unit 
completes the toner transfer to the paper.   
PTR (Paper Transfer Roller) Drive 
 
 
ƒ P.P.: Power Pack  

 
B230/B237/D042 6-52 SM 
The toner is moved from the OPC [A] onto the surface of the image transfer belt [B] by a 
positive charge from the image transfer rolle r (immediately above the drum, not shown 
here). The ITB drive roller [C], which is giv en a negative charge, pushes the toner to the 
paper [D].   
The paper transfer roller [E] presses the paper  against the image transfer belt [B] (with a 
spring that is under tension from the paper  transfer roller contact motor), and grounds the 
charge...

 
SM 6-53 B230/B237/D042 
Detailed 
Descriptions 
paper transfer unit keeps away from the image transfer belt.  

 
B230/B237/D042 6-54 SM 
6.10 PAPER FEED 
6.10.1 OVERVIEW 
 
 
1. Pick-up roller - tray 1 
2. Separation roller - tray 1 
3. Feed roller - tray 1 
4. Registration roller 
5. Transport roller - By-pass feed   
6. Feed roller - By-pass feed   
7. By-pass feed table    8. Friction pad - By-pass feed   
9. Vertical transport roller 1 
10. Vertical transport roller 2 
11. Feed roller - tray 2 
12. Separation roller - tray 2 
13. Paper tray 2 
14. Pick-up roller - tray 2 
15. Paper tray 1 
 
There are two...

 
SM 6-55 B230/B237/D042 
Detailed 
Descriptions 
6.10.2  DRIVE – TRAY 1, TR AY 2, AND BY-PASS TRAY 
 
The paper feed motor [A] drives the pick-up and f eed mechanisms in tray 1 [B], tray 2 [C]. It 
uses clutches and complex tr ains of gears to do this. 
When tray 1 and tray 2 are inside the machine,  their pick-up rollers [E][F] are always in 
contact with each top sheet of  the paper stack (see section ). However, the feed roller [G] of 
the by-pass tray [D] stays away until the by-pass pick-up...

 
B230/B237/D042 6-56 SM 
6.10.3  PAPER LIFT – TRAYS 1 & 2 
 
When the tray is installed in the machine,  the tray bar [A] pushes the lever [B], and this 
lever pushes down the pick-up roller [C] onto the paper. 
Also, the rear end of the paper tray pushes the tray  set switch; see section    (for tray 2, this 
is the paper size switch). As a  result, the machine detects that  the paper tray is installed.   
When the machine detects that a tray has been  placed in the machine, the tray lift motor 
[D]...

 
SM 6-57 B230/B237/D042 
Detailed 
Descriptions 
6.10.4  PAPER SIZE DETECTION – TRAYS 1 & 2 
 
There is no size switch for tray 1. The paper si ze is fixed at either A4 or LT (LEF for both 
sizes). You can change the size setting with SP5-181-1. 
For tray 2, 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...

 
B230/B237/D042 6-58 SM 
ƒ  *2: The machine detects either LG SEF or B4 SEF, depending on the setting of 
SP5-181-4. 
ƒ  *3: The machine detects either LT LE F or A4 LEF, depending on the setting of 
SP5-181-2. 
ƒ  *4: The machine detects either Exe LE F or B5 LEF, depending on the setting of 
SP5-181-5 
ƒ  SP 5-181-6 to –13 does similar functions for the optional paper trays. 
The machine disables paper feed from a tray if the paper size cannot be detected (if the 
paper size actuator is broken or no...

 
SM 6-59 B230/B237/D042 
Detailed 
Descriptions 
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 
6.10.6 PAPER END DETE
CTION – TRAYS 1 & 2 
 
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...

 
B230/B237/D042 6-60 SM 
6.10.7 REGISTRATION 
 
The registration motor [A] drives the registration roller [B] with a complex train of gears. 
The machine makes a paper buckle at the registration roller to correct paper skew. You can 
adjust the paper buckle with SP1-003. 
6.10.8  PAPER FEED LINE SPEED 
This machine has two process line speeds (for  feed from registration roller to fusing unit). 
The line speeds depend on the selected mode. 
 
Mode  Line speed (mm/s)  Print speed (ppm)  
Plain/ 
Middle...