Ricoh B230 Service Manual

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

 
B230/B237 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 paper...

 
SM 6-55 B230/B237 
Detailed 
Descriptions 
6.10.2  DRIVE – TRAY 1, TRAY 2, AND BY-PASS TRAY 
 
The paper feed motor [A] drives the pick-up and feed mechanisms in tray 1 [B], tray 2 [C]. It 
uses clutches and complex trains 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 solenoid [H]...

 
B230/B237 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] rotates and...

 
SM 6-57 B230/B237 
Detailed 
Descriptions 
6.10.4  PAPER SIZE DETECTION – TRAYS 1 & 2 
 
There is no size switch for tray 1. The paper size 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 pushed, 1:...

 
B230/B237 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 LEF or A4 LEF, depending on the setting of 
SP5-181-2. 
ƒ  *4: The machine detects either Exe LEF 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 tray is...

 
SM 6-59 B230/B237 
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 DETECTION – 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 end sensor...

 
B230/B237 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 Thick 138...

 
SM 6-61 B230/B237 
Detailed 
Descriptions 
6.10.9 TRAY LOCK MECHANISM 
This machine has two types of tray lock mechanism. 
Tray Lock at the Front 
 
The lock at the front prevents the tray from coming out of the machine during transporting 
or shipping. When you pull the handle [A], the lock lever [B] is lowered. As a result, you can 
pull out the tray. 
Tray Lock at the Rear 
 
This mechanism is only activated when the machine detects a paper jam. The lock at the 
rear prevents the tray from coming...

 
B230/B237 6-62  SM 
The lock lever [B] locks tray 1 [C] and tray 2 [D].   
6.10.10 PAPER  DUST  COLLECTION 
 
The two mylars [A] scrape the paper dust from the registration idle roller [B]. The paper 
dust falls down into the paper dust container [C]. 
6.10.11 BY-PASS PAPER SEPARATION 
 
When the paper set sensor detects paper and the machine gets a by-pass printing job, the 
by-pass solenoid [A] unlocks the feed shaft stopper at the front end of the by-pass feed 
shaft [B].   
The by-pass feed shaft...