Ricoh SR790 User manual

1000-SHEET FINISHER
(Machine Code: B408)

26 July 2002 MAIN PCB
B408-1
Peripherals
1. REPLACEMENT AND ADJUSTMENT
!CAUTION
Turn off the main power switch and unplug the machine before beginning
any of the procedures in this section.
NOTE: This manual uses the following symbols.
☛: See or Refer to !: Screws ": Connector #: Clip ring
$: E-ring
1.1 MAIN PCB
1. Rear cover [A] (!x 2)
2. Main PCB [B] (!x 4, All ")
B408R110.WMF
B408R109.WMF
[B]
[A]

STAPLER UNIT 26 July 2002
B408-2
1.2 STAPLER UNIT
1. Side cover [A] (!x 2)
2. Open exit guide plate [B]
3. Upper side cover [C] (!x 2)
4. Front cover support plate [D] (!x 1)
5. Front cover [E]
6. Front inner cover [F] (!x 2)
7. Harness [G]
8. Unhook the spring [H]
9. Turn the stapler unit [I] and take it
out.
10. Bracket [J] (!x 2)
B408R102.WMF
B408R113.WMF
B408R114.WMF
[A]
[B]
[C]
[D] [E] [F]
[G]
[H]
[I]
[J]

26 July 2002 MOTORS
B408-3
Peripherals
1.3 MOTORS
1.3.1 SHIFT MOTOR
1. Rear cover (☛1.1)
2. Shift motor [A] (!x 2, "x 1)
1.3.2 STAPLER MOTOR
1. Rear cover (☛1.1)
2. Stapler motor [A] (!x 2, "x 1)
B408R123.WMF
B408R124.WMF
[A]
[A]

MOTORS 26 July 2002
B408-4
1.3.3 UPPER TRANSPORT MOTOR AND EXIT MOTOR
1. Rear cover (☛1.1)
2. Motor assembly [A] (!x 4, "x 2)
3. Upper transport motor [B] (!x 4)
4. Exit motor [C] (!x 4)
1.3.4 LOWER TRANSPORT MOTOR
1. Main PCB (☛1.1)
2. Lower transport motor [A] (!x 2, "x
1)
B408R112.WMF
B408R111.WMF
[A]
[B]
[C]
[A]

26 July 2002 MOTORS AND SENSORS
B408-5
Peripherals
1.4 MOTORS AND SENSORS
1.4.1 PREPARATION
1. Front cover and inner cover (☛1.2)
2. Upper side cover [A] (!x 2)
3. Upper tray [B] (!x 1)
4. Lower side cover [C] (!x 2)
5. Loosen the 2 screws [D].
6. Lower the lower tray guide plate [E].
7. Guide plate [F] (!x 4)
B408R116.WMF
B408R117.WMF
B408R118.WMF
[A]
[B]
[C]
[D]
[E]
[F]

MOTORS AND SENSORS 26 July 2002
B408-6
1.4.2 STACK HEIGHT SENSOR
1. Stack height sensor assembly [A] (!x
1)
2. Stack height sensor [B] ("x 1)
1.4.3 STAPLER TRAY PAPER SENSOR
1. Stapler tray paper sensor [A] ("x 1)
B408R121.WMF
B408R120.WMF
[A]
[B]
[A]

26 July 2002 MOTORS AND SENSORS
B408-7
Peripherals
1.4.4 LOWER TRAY LIFT MOTOR
1. Lower tray lift motor [A] (!x 2, "x 1)
1.4.5 STACK FEED-OUT MOTOR
1. Stack feed-out motor [A] (!x 2, "x 1)
B408R119.WMF
B408R122.WMF
[A]
[A]

JAM DETECTION 26 July 2002
B408-8
2. TROUBLESHOOTING
2.1 JAM DETECTION
Mode
Shift Staple Jam Content
✔✔Entrance sensor:
On check The entrance sensor does not turn on within the normal time after the main
machine exit sensor turns on
✔✔Entrance sensor:
Off check The entrance sensor does not turn off within the normal time after it turns on.
✔Lower tray exit sensor:
On check The lower tray exit sensor does not turn on within the normal time after the
entrance sensor turns off.
✔Tray exit sensor:
Off check The tray exit sensor does not turn off within the normal time after it turns on.
✔Stapler tray entrance sensor:
On check The stapler tray entrance sensor does not switch on within the normal time
after the entrance sensor switched on.
✔Stapler tray entrance sensor:
Off check The staple tray entrance sensor does not turn off within the normal time after it
turns on.
✔Lower tray exit sensor:
On check The lower exit sensor does not turn on after the feed-out pawl feeds out the
outputs.
✔Lower tray exit sensor:
Off check The lower exit sensor turns on when the feed-out pawl returns to its home
position after feeding out the outputs.

26 July 2002 DIP SWITCH SETTINGS
B408-9
Peripherals
3. SERVICE TABLES
3.1 DIP SWITCH SETTINGS
The DIP switches should not be set to any combination other than those listed in
the table below.
SW100
1 2 Description
0 0 Normal operation mode (Default)
1 0 Packing mode.
• Before packing the machine, do the following: Set switch 1 to 1 then back to
zero. The lower tray moves to the lowest position. Then turn off the main switch.
• After unpacking the machine, do the following: After turning the main switch back
on, the lower tray returns to home position automatically.