Ricoh ps400 Service Manual
PAPER TRAY UNIT
(Machine Code: A861)
17 May, 1999 SPECIFICATIONS
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Paper Size
Paper Weight: 60 ~ 105 g/m2, 16 ~ 28 lbs.
Tray Capacity: 500 sheets (80 g/m2, 20 lbs. ) x 1 tray
Paper Feed System: Feed roller and friction pad
Paper Height Detection: 4 steps (100%, 70%, 30%, Near end)
Power Source: 24 VDC and 5VDC (from the copier):
Power Consumption: Max:20 W (Copying)
Weight: 12 kg (26.4 lbs)
:
A5 to A3
HLT lengthwise to DLT
120 Vac:
120 V version, from the copier when the optional
tray heater is installed
220 ~ 240 Vac:
230 V version, from the copier when the optional
tray heater is installed
23 W (Optional Tray Heater On)
Average:13 W (Copying)
15 W (Optional Tray Heater On)
Size (W x D x H): 550 mm x 520 mm x 134 mm
Options
A861-1
MECHANICAL COMPONENT LAYOUT 17 May, 1999
1.2 MECHANICAL COMPONENT LAYOUT
2
1. Paper Feed Roller
2. Tray
3
4
A861V101.WMF
1
3. Bottom Plate
4. Optional Tray Heater
A861-2
17 May, 1999 ELECTRICAL COMPONENT LAYOUT
1.3 ELECTRICAL COMPONENT LAYOUT
1
2
3
4
5
6
7
10
8
9
A861V102.WMF
1. Tray Main Board
2. Lift Sensor
3. Lift Motor
4. Paper Height 2 Sensor
5. Paper Height 1 Sensor
6. Paper Feed Motor
7. Tray Cover Switch
8. Paper End Sensor
9. Paper Size Switch
10. Optional Tray Heater
Options
A861-3
ELECTRICAL COMPONENT DESCRIPTION 17 May, 1999
1.4 ELECTRICAL COMPONENT DESCRIPTION
Symbol Name Function Index No.
Motors
M1 Paper Feed Drives the paper feed roller. 6
M2 Lift Lifts the tray bottom plate. 3
Sensors
S1
S2
S3 Paper Height 1 Detects the amount of paper in the tray. 5
S4 Paper Height 2 Detects the amount of paper in the tray. 4
Switches
SW1 Tray Cover Detects whether the tray cover is opened. 7
SW2 Paper Size Determines what paper size is in the tray. 9
Lift Detects when the paper in the tray is at the
correct feed height.
Paper End Informs the copier when the tray runs out of
paper.
2
8
PCBs
PCB1
Others
H1
Tray Main Controls the paper tray unit and communicates
with the copier.
Optional Tray
Heater
Removes humidity from the paper in the tray.
1
10
A861-4
17 May, 1999 DRIVE LAYOUT
1.5 DRIVE LAYOUT
1
2
A861V103.WMF
1. Paper Feed Motor 2. Paper Feed Roller
Options
A861-5
PAPER FEED AND SEPARATION 17 May, 1999
2. DETAILED DESCRIPTIONS
2.1 PAPER FEED AND SEPARATION
[A]
[B]
[C]
A861D103.WMF
The paper tray holds 500 sheets. The paper feed roller [A] drives the top sheet of
paper from the paper tray to the copier. The friction pad [B] allows only one sheet
to feed at a time. The friction pad applies pressure to the feed roller with a spring
[C].
A861-6
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