Ricoh B230 Service Manual
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![Page 1206
B793 26 SM
1.4 OTHERS
1.4.1 MAIN BOARD
1. Remove the rear cover.
2. Remove the main board [A] (
x 5).](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1205.png "Page 1206
B793 26 SM
1.4 OTHERS
1.4.1 MAIN BOARD
1. Remove the rear cover.
2. Remove the main board [A] (
x 5).")
Component Layout SM 31 B793 B793 Booklet Finisher 13. Proof Tray Gate Solenoid 14. Lower Transport Motor 15. Entrance Motor 16. Positioning Roller Solenoid 17. Main Board 18. Shift Tray Motor 19. Lower Limit Sensor 20. Upper Cover Sensor 21. Staple Tray Gate Solenoid 22. Upper Transport Motor 23. Shift Motor 24. Shift Motor HP Sensor
B793 32 SM 38. Fold Unit Exit Sensor 39. Lower Clamp Roller HP Sensor 40. Lower Retraction Motor 41. Fold Unit Entrance Sensor 42. Bottom Fence HP Sensor 43. Fold Cam HP Sensor 44. Fold Roller Motor 45. Fold Plate HP Sensor 46. Fold Plate Motor 47. Bottom Fence Lift Motor
Component Layout SM 33 B793 B793 Booklet Finisher 48. Punch Motor 49. Punch Encoder Sensor 50. Punch HP Sensor 51. Punch Board 52. Paper Position Sensor Slide Motor 53. Paper Position Slide HP Sensor 54. Paper Position Sensor 55. Punch Movement HP Sensor 56. Punch Hopper Full Sensor 57. Punch Movement Motor
B793 34 SM Electrical Component Descriptions Boards Item No.Purpose Main Board 17 Controls the finisher. Punch Board 51 Controls the punch unit. Sensors Item No. Purpose Proof Tray Exit Sensor 1 Detects paper when it is fed out to the proof tray. Shift Tray Exit Sensor 3 Detects paper when it is fed out to the shift tray. Shift Tray Position Sensor 5 Detects when the shift tray is at the correct height to receive paper. Rear Booklet Tray Full Sensor 6 One of two sensors that the machine uses to determine when the booklet tray is full. Front Booklet Tray Full Sensor 7 One of two sensors that the machine uses to determine when the booklet tray is full. Proof Tray Full Sensor 8 Detects when the proof tray is full. Exit Guide Plate HP Sensor 9 Detects when the exit guide plate is at home position Entrance Sensor 10 Detects when paper comes into the finisher Staple Tray Exit Sensor 12 Detects paper leaving the bottom of the stapler Lower Limit Sensor 19 Detects when the shift tray has moved to its lowest possible position (the shift tray is full). Upper Cover Sensor 20 Detects when the upper cover is open Shift Motor HP Sensor 24 Detects when the side-to-side motion of the shift roller is at home position
Component Layout SM 35 B793 B793 Booklet Finisher Item No. Purpose Stopper S HP Sensor 28 Detects when the ‘stopper S’ mechanism is at home position. Stack Feed Out HP Sensor 29 Detects when the stack feed-out belt is at home position Staple Unit HP Sensor 30 Detects when the side-to-side motion of the stapler unit is at home position Jogger HP Sensor 34 Detects when the jogger unit is at home position Staple Tray Paper Sensor 35 Detects when paper is fed into the stapler tray Stapler Safety Sensor 37 Stops side-to-side movement of the stapler until stopper S and the stack feed-out pawl mechanisms are at home position, to prevent damage to the machine. Fold Unit Exit Sensor 38 1) Detects the folded edge of the stack as it feeds out from the nip of the fold rollers so the fold feeds back into the nip, 2) when the folded booklet finally emerges from the nip of the fold rollers, detects the leading and trailing edge of the booklet to make sure that it feeds out correctly. Lower Clamp Roller HP Sensor 39 Detects when the lower clamp roller is at home position Fold Unit Entrance Sensor 41 Detects 1) the leading edge of the stack during booklet stapling, and 2) also used to signal an alarm if a paper is detected at the entrance of the fold unit when the copier is turned on. Bottom Fence HP Sensor 42 Detects when the bottom fence of the booklet folding mechanism is at home position Fold Cam HP Sensor 43 Along with the fold plate HP sensor, this sensor controls the movement of the fold plate. The actuator mounted on the end of the roller that drives the folder plate forward and back makes three full rotations, i.e. the actuator passes the sensor gap twice and stops on the 3rd rotation and reverses. This accounts for the left and right movement of the fold plate. Fold Plate HP Sensor 45 Along with the fold plate HP sensor this sensor controls the movement of the fold plate. The fold plate has arrived at the home position when the edge of the plate enters the gap of this sensor. Punch Encoder Sensor 49 Controls the timing for activating the punches, to punch holes in the paper at the correct position.
B793 36 SM Item No. Purpose Punch HP Sensor 50 Detects when the hole-punch firing mechanism is at home position Paper Position Slide HP Sensor 53 Detects when the mechanism that measures the paper position in the punch unit is at home position Paper Position Sensor 54 Detects the side edge of the paper, to tell the machine where to put the punch holes. Punch Movement HP Sensor 55 Detects when the side-to-side motion of the punch unit is at home position. Punch Hopper Full Sensor 56 Detects when the punch hopper is full. Also checks if the hopper is installed correctly. Motors Item No. Purpose Exit Guide Plate Motor 2 Controls the exit guide plate mechanism. Lower Transport Motor 14 Controls the positioning roller, and other rollers in the finisher (see ‘Drive Layout’ for details). Entrance Motor 15 Controls the rollers at the entrance of the finisher. Shift Tray Motor 18 Moves the shift tray up and down. Upper Transport Motor 22 Controls the rollers that feed paper from the junction gate to the proof tray and to the shift tray (see ‘Drive Layout’ for details). Shift Motor 23 Moves the shift tray from side to side. Stack Feed Out Motor 25 Controls the stack feed-out belt Jogger Motor 26 Controls the jogger in the stapler tray Upper Retraction Motor 27 Controls the ‘stopper S’ mechanism. Also moves the upper clamp roller into contact and away from the stack of paper in the stapler tray. Upper 33 Rotates the upper clamp roller.
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 positions 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 stack 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 Controls the positioning roller. Staple Tray Gate Solenoid 21 Controls 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.
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 control 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
B793 40 SM 2.3 PROOF TRAY Proof Tray Junction Gate Control [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]