- Always switch the machine off and unplug the machine before doing the following procedure.
 
- If the finisher is connected to the machine, disconnect it.
 - If the finisher is installed on the machine, remove it.
 - Remove the rear upper cover [A] of the finisher.
 - Remove the rear lower cover [A] of the finisher.
 - Open the front door [A], and then remove the punch hopper bracket [B].
 - Pull out the stapler unit [A]. (Booklet Finisher SR4130 (D3CH) only)
 Remove the inner upper cover [A] from the front side of the finisher.
- Disconnect the harness from the back side of the inner upper cover when you remove the inner upper cover.
 
- Disconnect the harness from the back side of the inner upper cover when you remove the inner upper cover.
 - Remove screw [A] of the transport guide plate from the rear side of the finisher.
 - Remove the transport guide plate [A].
 - Install the punch unit slide stay [A] from the rear side of the finisher.
 - Fasten the punch unit slide stay. (Front side [A], Rear side [B])
- Front side:
 - Rear side:
 
 - Front side:
 - Insert the paper chip guide [A] into the finisher as shown below.
 Install the paper chip guide. (Front side [A]: hook x 2, Rear side [B]: hook x 2, snap ring x 1)
- Hook the paper chip guide onto the front side of the finisher first, and then hook it onto the rear side of the finisher.
 
- Front side:
 - Rear side:
 
Fasten the paper chip guide with an E-ring at the rear side of the finisher. (snap ring x 1)
- When fastening the paper chip guide with the snap ring, make sure the front side of the paper chip guide is hooked into the slot with the small diameter [A].
 
- When fastening the paper chip guide with the snap ring, make sure the front side of the paper chip guide is hooked into the slot with the small diameter [A].
 - Insert the hopper bracket [A] into the finisher as shown below.
 Hook the hopper bracket onto the frame [A] [B] of the finisher.
- Make sure the hooks [A] and [B] of the hopper bracket are also hooked onto the finisher.
 
- Make sure the hooks [A] and [B] of the hopper bracket are also hooked onto the finisher.
 - Fasten the hopper bracket [A].
 - Route the harness of the hopper bracket [A] inside the finisher as shown.
 - Route the harness of the hopper bracket to the rear side of the finisher.
 Insert the registration guide plate [A] from the rear side of the finisher.
- Hook [A] and [B] of the registration guide plate into the slotted holes of the finisher.
 
- Hook [A] and [B] of the registration guide plate into the slotted holes of the finisher.
 - Fasten the registration guide plate.
- Front side:
 - Rear side:
 
 - Front side:
 Insert the registration sensor bracket from the rear side of the finisher.
- Hook [A] of the registration sensor bracket into the slotted holes of the finisher.
 
- Hook [A] of the registration sensor bracket into the slotted holes of the finisher.
 - Fasten the registration sensor bracket.
 Insert the punch unit [A] from the rear side of the finisher.
- Make sure the shaft [A] on the finisher is inserted into the punch unit [B].
 
- When inserting the punch unit, make sure the bracket [A] of the punch unit is in the right position as shown below.
 
- Make sure the shaft [A] on the finisher is inserted into the punch unit [B].
 Fasten the punch unit. (rear side)
- Make sure the bracket of the punch unit fits the embossed parts [A] on the finisher.
 
- Make sure the bracket of the punch unit fits the embossed parts [A] on the finisher.
 Install the stepper motor bracket [A] from the rear side of the finisher.
Fit the hole [A] of the stepper motor bracket over the shaft [B] on the rear side of the finisher.
Make sure the rack [A] of the punch unit is engaging with the pinion [B] of the stepper motor bracket when you insert the stepper motor bracket.
- Fasten the stepper motor bracket.
 - Connect the harness [A] of the registration sensor bracket to the harness [B] from the hopper bracket.
 - Connect the harness [A] of the registration sensor bracket to the harness [B] from the punch unit.
 Connect the harness connector cable provided with the punch unit to the main board [A] of the finisher.
- The end that is split into two connectors must be connected to the main board.
 
Route the harness connector cable as shown below.
- Route the harness under the I/F bracket [A] as shown below. The dotted line shows where the harness goes under the bracket.
 
- Route the harness under the I/F bracket [A] as shown below. The dotted line shows where the harness goes under the bracket.
 - Connect the harness connector cable to the PCB [A] on the punch unit.
 - Connect the harness [A] of the stepper motor bracket to the PCB [B] in the punch unit.
 - Connect the harness [A] of the registration sensor bracket to the PCB [B] in the punch unit.
 Gather the harnesses of steps 32-34 [A] with your hands, and then fasten them with the clamps as shown below.
- When you clamp the harness in clamp [A], clamp the harness between the two binds [B].
 
- Route the harness [A] of the punch unit over the PCB as shown below by the dotted blue line.
 
- When you clamp the harness in clamp [A], clamp the harness between the two binds [B].
 - Slide the punch waste hopper [A] into the finisher from the rear.
 - Pull back the stapler unit.
 - Re-attach the covers, and then re-install the finisher on the main machine. (Finisher SR4120/SR4130 (D3CG/D3CH))
 - Connect the finisher connector to the main machine.
 - Turn ON the main power switch of the machine.
 - Check the finisher operation.