Ricoh sr790 SPECIFICATIONS
1,000-SHEET FINISHER
(Machine Code: B408)
10 August, 2001 MAIN PCB
1. REPLACEMENT AND ADJUSTMENT
1.1 MAIN PCB
[A]
[B]
1. Rear cover [A] (!x 2)
2. Main PCB [B] (!x 4, All ")
B408R109.WMF
B408R110.WMF
B408-1
Options
STAPLER UNIT 10 August, 2001
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)
[B]
[C]
[A]
B408R102.WMF
[D]
[E]
[F]
[G]
B408-2
B408R113.WMF
[J]
[H]
[I]
B408R114.WMF
10 August, 2001 MOTORS
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 [B] (! x 2, " x 1)
[A]
B408R123.WMF
[B]
1.3.3 UPPER TRANSPORT MOTOR AND EXIT MOTOR
1. Rear cover (☛1.1)
2. Motor assembly [C] (! x 4, " x 2)
[C]
3. Upper transport motor [D] (! x 4)
4. Exit motor [E] (! x 4)
[D]
[E]
B408R124.WMF
Options
B408R112.WMF
B408-3
MOTORS 10 August, 2001
1.3.4 LOWER TRANSPORT MOTOR
1. Main PCB (☛1.1)
2. Lower transport motor [A] (! x 2, " x
1)
[A]
B408R111.WMF
B408-4
10 August, 2001 MOTORS AND SENSORS
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. Shift 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)
[A]
[B]
[C]
B408R116.WMF
[E]
[D]
[F]
B408R117.WMF
Options
B408R118.WMF
B408-5
MOTORS AND SENSORS 10 August, 2001
1.4.2 STACK HEIGHT SENSOR
1. Stack height sensor assembly [A] (! x
1)
[A]
2. Stack height sensor [B] (" x 1)
[B]
B408R121.WMF
1.4.3 STAPLER TRAY PAPER SENSOR
1. Stapler tray paper sensor [C] (" x 1)
[C]
1.4.4 LOWER TRAY LIFT MOTOR
1. Lower tray lift motor [D] (! x 2, " x 1)
B408R120.WMF
[D]
B408-6
B408R119.WMF
10 August, 2001 MOTORS AND SENSORS
1.4.5 STACK FEED-OUT MOTOR
1. Stack feed-out motor [A] (! x 2, " x 1)
[A]
B408R122.WMF
B408-7
Options
JAM DETECTION 10 August, 2001
2. TROUBLESHOOTING
2.1 JAM DETECTION
Mode
Shift Staple
!!
!!
!
!
!
!
!
!
Jam Content
Entrance sensor:
On check
Entrance sensor:
Off check
Lower tray exit
sensor: On check
Tray exit sensor:
Off check
Stapler tray
entrance sensor:
On check
Stapler tray
entrance sensor:
Off check
Lower tray exit
sensor:
On check
Lower tray exit
sensor:
Off check
The entrance sensor does not t urn on w ithin
the normal time after the main machine exit
sensor turns on
The entrance sensor does not t urn of f within
the normal time after it turns on.
The lower tray exit sensor does not turn on
within the normal time after the entrance
sensor turns off.
The tray exit sensor does not turn off within
the normal time after it turns on.
The stapler tray entrance sensor d oes not
switch on within the normal time after the
entrance sensor switched on.
The staple tray entrance sens or does not
turn off within the normal time after it turns
on.
The lower exit sensor does not turn on after
the feed-out pawl feeds out the o ut put s.
The lower exit sensor turns on when the
feed-out pawl returns to its HP after fe edi ng
out the outputs.
B408-8
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