Ricoh Mp C3000 Service Manual

							Exit Guide Plate, Paper Feed Out 
SM 47 B793 
B793 
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2.7  EXIT GUIDE PLATE, PAPER FEED OUT 
 
The exit guide plate [A] opens  when a stapled stack is fed out. 
Also it opens every time a sheet is fed to the  staple tray, to prevent the paper running into 
the exit roller during stacking. 
The exit guide plate motor [B] drives the exit  guide plate. The exit guide plate HP sensor [C] 
detects when the guide plat e is at home position. 
The stack feed-out belt feeds out stapled stacks . The pawl [D] on the belt moves the stack 
out to the exit. 
The stack feed-out motor [E] drives the belt. T he stack feed-out HP sensor [F] detects when 
the belt is at home position.  
						

							Stapler Unit Movement 
B793 48  SM 
2.8  STAPLER UNIT MOVEMENT 
 
The machine has only one stapler [A]. It does  stapling for booklets and for corner stapling. 
The stapler unit motor [B] moves the stapler fr om side to side. The stapler unit HP sensor 
[C] detects when the stapler unit is at home position. 
In corner staple mode, at the start of the j ob, the stapler moves to the position where the 
stapler will be inserted. 
In booklet mode, at the start of a job, the  stapler moves to a starting position that depends 
on the paper size, as follows:  ƒ  8.5 x 14 inches or shorte r: Rear side staple position 
ƒ  Longer than 8.5 x 14 inches: Center position. When the st apler is at the center 
position, bracket [E] rel eases ‘stopper L’, which ca tches the bottom edge of the 
paper for booklet stapling with longer paper  sizes. This will be described in a later 
section. 
If the stapler safety sensor [D] detects the stapl er unit at its initialization, the stapler unit 
stops moving until the stack feed out belt pawl  and stopper S are at home position. If the 
stapler unit does not stop, it could  collide with the pawl and/or the stopper.  
						

							Stacking for Booklet Stapling 
SM 49 B793 
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2.9  STACKING FOR BOOKLET STAPLING 
2.9.1 OVERVIEW 
There are two stoppers near the stapler unit. T hese stoppers hold the stack of paper in the 
correct position during stacking. 
The stoppers are called ‘stopper S’ and ‘stopper  L’. Stopper S is used for legal size paper, 
or shorter than 8.5 x 14 inches. Stopper L is  used for paper that is longer than 8.5 x 14 
inches. 
 
ƒ  In corner stapling mode, the pawl on t he stack feed-out belt holds the stack of 
paper. For booklet stapling, this pawl stay s at home position, which is on the rear 
side, so it does not inte rfere with booklet stapling. 
2.9.2  8.5 X 14 (LEGAL) OR SHORTER 
 
At the start of the set, the upper retracti on motor [A] turns on, and stopper S [B] moves 
down into position to catch the paper 
. The upper retraction motor also moves the upper 
clamp roller [C] into contact with the stack 
.  
						

							Stacking for Booklet Stapling 
B793 50  SM 
 
When the stack is complete, stopper S moves away [D], and the machine feeds the stack to 
the correct position for stapling. To do this, the upper clamp roller motor [E] rotates the 
upper clamp roller. 
2.9.3  LONGER THAN 8.5 X 14 INCHES 
 
At the start of the set, the stapler moves to the  center position. At this position, a bracket [A] 
on the stapler unit pushes stopper L [B]. The  pawl [C] on the stopper L assembly then 
moves into position to catch the paper. T he upper clamp roller holds the stack (see the  
						

							Stacking for Booklet Stapling 
SM 51 B793 
B793 
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previous section). 
When the stack is complete, the stapler mo ves to the rear-side position, and stopper L 
moves away. The machine feeds the stack  to the correct position for stapling.  
						

							Moving the Stack to the Folding Position 
B793 52  SM 
2.10  MOVING THE STACK TO THE FOLDING POSITION 
 
First, the upper clamp roller feeds the sta ck down after the stack has been stapled. When 
the lower clamp roller [A] catches the stack,  the upper clamp roller stops, and the lower 
clamp roller feeds the stack down. 
The lower clamp roller is released just befor e the leading edge of the stack reaches the 
bottom fence [B] (this fence cons ists of two pawls that catch the paper). The bottom fence 
moves the stack to the folding position 
The fold roller motor [C] tu rns the lower clamp roller. 
The lower retracting motor [D] moves the lo wer clamp roller against and away from the 
stack. The lower clamp roller HP sensor [E] det ects when the lower clamp roller is moved to 
the home position. 
The bottom fence lift motor [F] moves the bottom fence up and down. The bottom fence HP 
sensor [G] detects when the botto m fence is at home position.  
						

							Folder 
SM 53 B793 
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2.11 FOLDER 
2.11.1 OVERVIEW 
The fold plate pushes the stack into the nip bet ween the fold rollers. The fold rollers feed 
out the stack, then reverse to feed it back in agai n. Then, the fold rollers feed the stack out 
of the folder, to the booklet tray. 
2.11.2 FOLD PLATE 
 
[A]: Bottom Fence Stack Stoppers. Catches t he stack after it is released by the clamp 
rollers. 
[B]: Fold Plate Motor. Drives the timing  belt and gears that move the fold plate. 
[C]: Fold Plate Cam. Controls the movement of t he fold plate to the left (into the nip of the 
fold rollers) and right (toward the fold plate home position). 
[D]: Fold Plate HP Sensor. Controls  operation of the fold plate motor. 
[E]: Fold Plate. Moves left and pushes the st ack into the nip of the fold rollers and then 
moves right to retract.  
						

							Folder 
B793 54  SM 
2.11.3 FOLD ROLLERS 
 
[F]: Fold Roller Motor. Drives forward to  feed out the stack at the fold, and then drives 
forward again to feed out the folded stack.  
 
ƒ  This cycle can be repeated by  changing the setting of SP6136.  
[G]: Fold Rollers. Driven by the fold roller motor,  this roller pair feeds out the stack at its fold, 
reverses to feed in the stack to, and then feeds  forward again (assisted by the fold unit exit 
rollers – not shown) to feed out the stack to the lower tray.  
						

							Punch Unit 
SM 55 B793 
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2.12 PUNCH UNIT 
2.12.1  OVERVIEW OF OPERATION 
Skew Correction Before Punching 
 
The finisher entrance roller corrects for  paper skew and then the punch unit moves across 
to punch the holes at the  correct position. Each sheet is punched one at a time. 
Paper feeds out of the copier. The finisher  entrance sensor [A] detects the leading edge of 
the sheet. 
The finisher entrance roller [B] stops rotating br iefly while the copier exit rollers continue to 
rotate. This buckles the paper against the fi nisher entrance roller to correct skew. The 
finisher entrance roller starts to rotate  again and feeds the sheet into the finisher. 
These SP codes adjust the ske w operation in the punch unit: 
ƒ  SP6130. This SP corrects the punch hole ali gnment. To do this, it corrects the skew of 
each sheet by adjusting the amount of time the finisher entrance roller remains off 
while the exit roller of the machine rema ins on. For more, see Section 5. Service 
Tables. 
ƒ  SP6131. This SP determines w hether the finisher entrance roller stops to correct skew 
when paper enters the finisher. You can use this SP to disable the skew correction. For 
more, see Section 5. Service Tables.  
						

							Punch Unit 
B793 56  SM 
Punch Unit Position Correction 
 
These operations (skew correction before pu nching, and punch unit position correction) 
increase the accuracy of the punch alignment. 
  
The trailing edge of the sheet passes  the finisher entrance sensor [A]. 
The paper position slide unit moves the paper po sition sensor [B] forward to the edge of the 
paper. 
The paper position sensor detects  the position of the paper edge and sends this information 
to the punch unit board. The machine uses the detected position  of the paper edge to 
calculate the correct  position for punching. 
The upper transport motor switches on and ro tates the feed rollers [C] the prescribed 
distance to put the paper under the punch unit [D]. 
  
Using the result of the posit ion calculation, the punch unit control board moves the punch 
unit [D] to the adjusted punch position. 
The paper position slide unit and its paper sens or, move back to the paper position slide 
home position sensor  [E], and the punch unit fires the  punches to make the holes.  
  
The feed rollers feed the punched paper out of the punch unit and into the paper path. The 
punch unit moves back to home position (det ected by the home position sensor [F].