Ricoh Mp C3000 Service Manual

							Component Layout 
SM 37 B793 
B793 
Booklet 
Finisher 
Item No. Purpose 
Clamp 
Roller Motor 
Stapler Unit 
Motor  36  Moves the stapler from side to side. 
Lower 
Retraction 
Motor 40 Drives a large cam that alternately clamps and unclamps the lower 
clamp roller, which is the idle roller of the clamp roller pair.  
When these rollers are clamped, they 
are part of the paper feed path 
and feed the stack toward the bottom  fence of the fold unit. When the 
idle roller is retracted, the stacks falls a very short distance (3 mm) 
onto the fold unit bottom fence below. These rollers remain 
unclamped while the bottom fence pos itions the stack for folding and 
while the stack is folded by the fold rollers. 
Fold Roller 
Motor  44  Controls the rollers that fold the paper. 
Fold Plate 
Motor 46  Controls the plate that makes the fold in the paper. 
Bottom 
Fence Lift 
Motor 47 
Raises the bottom fence and stapled st
ack to the correct fold position 
for the paper size. 
Punch 
Motor  48  Punches the holes in the paper. 
Paper 
Position 
Sensor 
Slide Motor  52 
Controls side-to-side movement of 
the paper position sensor in the 
punch unit. 
Punch 
Movement 
Motor  57  Moves the punch from side to side. 
Solenoids 
Item No.Purpose 
Proof Tray Gate Solenoid  13  Controls the proof tray junction gate 
Positioning Roller Solenoid  16  C
ontrols the positioning roller. 
Staple Tray Gate Solenoid  21  Contro ls the staple tray junction gate 
Switches 
Item No. Purpose 
Upper Limit 
Switch 4 
Detects when the shift tray is 
at the highest possible position, 
and cuts power to the shift tray motor.  
						

							Component Layout 
B793 38  SM 
Item No. Purpose 
Front Door 
Safety Switch 11  Cuts dc power when the front door is opened. 
Others 
Item No. Purpose 
Staple Driver Unit  31  Pushes the staples into the paper. 
Staple Folder Unit  32  Folds the ends of the staples after stapling 
  
						

							Junction Gates 
SM 39 B793 
B793 
Booklet 
Finisher 
2.2 JUNCTION GATES 
Two junction gates contro l the path of paper. 
Each junction gate is controlled by a solenoid. 
Junction gate operation  is summarized in the following table. 
 
Mode Proof Shift Staple 
Paper Path 
Proof Tray  
Gate Solenoid  ON OFF OFF 
Staple Tray  
Gate Solenoid OFF OFF  ON 
  
						

							Proof Tray 
B793 40  SM 
2.3 PROOF TRAY 
 
Proof Tray Junction Gate Contro l [A]: Proof Tray Gate Solenoid 
Roller Drive:   ƒ  Proof Tray Exit Roller [B], Proof Tray  Transport Roller [C]: Controlled by the Upper 
Transport Motor 
ƒ  Entrance Roller [D], Transport Roller [E ]: Controlled by the Entrance Motor  
Jam Detection: Proof Tray Exit Sensor [F] 
Tray Full Detection: Proof  Tray Full Sensor [G]  
						

							Shift Tray 
SM 41 B793 
B793 
Booklet 
Finisher 
2.4 SHIFT TRAY 
2.4.1 UP/DOWN MOTION 
 
The shift tray motor [A] moves the tray up and down. 
The upper limit switch [B] detects when the tr ay moves up too far, and cuts power to the 
shift tray motor. 
The shift tray position sensor [C ] checks when the tray (or the top of the stack) is at the 
correct height to receive paper. 
ƒ  Shift Mode: This is checked every 5 sheets  
ƒ  Staple Mode: This is checked every stack  
The lower limit sensor [D] detects when the tray is full. At this poin t, the tray cannot move 
down any more.  
						

							Shift Tray 
B793 42  SM 
2.4.2 SIDE-TO-SIDE MOTION 
 
The shift motor [A] moves the shift roller [B] from side to side. 
The shift motor HP sensor [C] detects  when the mechanism is at home position. 
The upper transport motor rotates the shift roller. 
When shift mode is used, the shift motor turns on after each page is  fed out. Then, for the 
next set, the shift motor turns the other way. In  this way, the user can easily divide the sets.  
						

							Booklet Tray 
SM 43 B793 
B793 
Booklet 
Finisher 
2.5 BOOKLET TRAY 
 
The sensor actuator arm [A] re sts on the top of the stack of stapled booklets as they are 
output to the lower tray. A flap depressor [B ] keeps the open ends of the booklets down. 
The front booklet tray full sensor [C] and r ear booklet tray full sensor [D] detect when the 
tray is full of booklets.  
 
ƒ  The front booklet tray full sensor is  mounted higher than the rear booklet tray full 
sensor. 
ƒ  The booklet tray is stationary. When it  becomes full, the stapling and folding job 
stops until booklets are removed from the tray. 
ƒ  If the booklet tray is not installed (this  is detected if the front and rear sensors 
remain OFF), the machine will not operat e in the booklet staple and fold mode. 
When booklet mode is selected, the tray  full message appears on the operation 
panel. 
The combinations of the tw o actuators and two sensors w hen the actuator arm rises 
determines the number of booklets that t he tray can hold before the job stops. 
Tray full detection depends on the size of  the paper and the number of sheets in one 
stapled and folded booklet. 
The condition detected  by the machine (
 Ready  Full 1,  Full 2,  Full 3; see the 
illustration above) depends on the  states of the sensors, as shown in the table below.  
						

							Booklet Tray 
B793 44  SM 
 
Condition Front Sensor Rear Sensor 
Ready ON OFF 
Full 1 ON ON 
Full 2  OFF ON 
Full 3 (or booklet tray not 
installed)  OFF OFF 
 
In the tables below: 
ƒ  Sht denotes sheets in a stack. 
ƒ  Cnt denotes Count (see below for an explanation).  
After a booklet is feed out, the fold roller mo
tor stops the exit roller. The machine then 
monitors the tray full sensors every feed-out of a paper stack. The machine checks a 
certain condition, based on the si ze of the paper and the number of sheets in the booklet.  
Two examples are shown below  the table. Tell the operators that the number of sheets that 
the lower tray can hold will vary greatly.  
- Lower Tray Full Condition Tables -  
A3 (DLT)  
Sheet 1 2 3 4 5 6 7 8 9 10  
Full 1  15 
Cnt   - - - - - - - - - 
Full 2
 - 3 Cnt  11  
Cnt  - - - - - - - 
Full 3
 - - -  16 
Cnt  12 
Cnt  2 Cnt  3 Cnt  5 Cnt  6 Cnt  7 Cnt 
 
A4 (LT)
 
Sheet 1 2 3 4 5 6 7 8 9 10  
Full 1  15 
Cnt   - - - - - - - - - 
Full 2
 - 8 Cnt  16 
Cnt  19 
Cnt  5 Cnt
2 Cnt  2 Cnt  2 Cnt  3 Cnt  4 Cnt 
Full 3 - - - - - - - - - - 
  
						

							Booklet Tray 
SM 45 B793 
B793 
Booklet 
Finisher 
- Examples -  
After the copier makes a booklet with 1 sheet of 11 x 17 inch paper, the machine checks 
every feed-out of a paper stack for the ‘Full 1’ condition. If the Full 1 condition occurs 15 
times (‘ 15 Cnt’  in the table above), the machine  detects that the tray is full. 
After the copier makes a booklet with 5 sheet s of A4/LT paper, the machine checks every 
feed-out of a paper stack for the ‘Full 2’ condition. If the Full 3 condition occurs 5 times (‘ 5 
Cnt’  in the table above), the machine  detects that the tray is full.  
						

							Jogger Unit 
B793 46  SM 
2.6 JOGGER UNIT 
 
The jogger is used in corner-s taple mode and in booklet mode. 
For each sheet of paper when it arrives in  the staple tray, the following is done. 
ƒ  The jogger motor [A] drives  the jogger fences [B]. 
ƒ  The positioning roller solenoid moves the positioning roller [C] onto the top of the sheet.  Then the lower transport motor turns on and t he positioning roller rotates to push the 
sheet of paper against the  stopper (there are two stoppers: stopper L or stopper S the 
one that is used depends on the paper  size, as we shall see later.) 
The jogger HP sensor [D] detec ts when the jogger fences are at home position (away from 
the stack). 
The staple tray exit sensor [E] detects if a  jam occurs when the machine feeds the stack out 
at the bottom of the jogger tray.