Ricoh SP5 Series User manual

SP5
(Machine Code: A229)
SERVICE MANUAL
TS Dept. Imaging System Business Group
RICOH Co., LTD.

1
IIMPORTANT SAFETY NOTICES
PREVENTION OF PHYSICAL INJURY
1. Before disassembling or assembling parts of the copier and peripherals,
make sure that the copier power cord is unplugged.
2. The wall outlet should be near the copier and easily accessible.
3. Note that some components of the copier and the paper tray unit are
supplied with electrical voltage even if the main power switch is turned off.
4. If any adjustment or operation check has to be made with exterior covers off
or open while the main switch is turned on, keep hands away from electrified
or mechanically driven components.
5. If the Start key is pressed before the copier completes the warm-up period
(the Start key starts blinking red and green alternatively), keep hands away
from the mechanical and the electrical components as the copier starts
making copies as soon as the warm-up period is completed.
6. The inside and the metal parts of the fusing unit become extremely hot while
the copier is operating. Be careful to avoid touching those components with
your bare hands.
HEALTH SAFETY CONDITIONS
1. Never operate the copier without the ozone filters installed.
2. Always replace the ozone filters with the specified ones at the specified
intervals.
3. Toner and developer are non-toxic, but if you get either of them in your eyes
by accident, it may cause temporary eye discomfort. Try to remove with eye
drops or flush with water as first aid. If unsuccessful, get medical attention.
OBSERVANCE OF ELECTRICAL SAFETY STANDARDS
1. The copier and its peripherals must be installed and maintained by a
customer service representative who has completed the training course on
those models.
2. The NVRAM on the system control board has a lithium battery which can
explode if replaced incorrectly. Replace the NVRAM only with an identical
one. The manufacturer recommends replacing the entire NVRAM. Do not
recharge or burn this battery. Used NVRAM must be handled in accordance
with local regulations.

2
1. SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
Do not incinerate toner bottles or used toner. Toner dust may ignite
suddenly when exposed to an open flame.
2. Dispose of used toner, developer, and organic photoconductors in
accordance with local regulations. (These are non-toxic supplies.)
3. Dispose of replaced parts in accordance with local regulations.
4. When keeping used lithium batteries in order to dispose of them later, do not
put more than 100 batteries per sealed box. Storing larger numbers or not
sealing them apart may lead to chemical reactions and heat build-up.
LASER SAFETY
The Center for Devices and Radiological Health (CDRH) prohibits the repair of
laser-based optical units in the field. The optical housing unit can only be repaired
in a factory or at a location with the requisite equipment. The laser subsystem is
replaceable in the field by a qualified Customer Engineer. The laser chassis is not
repairable in the field. Customer engineers are therefore directed to return all
chassis and laser subsystems to the factory or service depot when replacement of
the optical subsystem is required.
IWARNING
Use of controls, or adjustment, or performance of procedures other than
those specified in this manual may result in hazardous radiation exposure.
IWARNING
WARNING: Turn off the main switch before attempting any of the
procedures in the Laser Unit section. Laser beams can seriously damage
your eyes.
CAUTION MARKING:

June 30, 1998 SPECIFICATIONS
1-1
Overall
Information
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
1.1.1 COPIER ENGINE
Configuration: Console
Copy Process: Dry electrostatic transfer system
Originals: Sheet/Book
Original Size: Maximum A3/11" x 17"
Minimum B6, 5½”x 8 ½” (using ADF)
Original Alignment: Rear left corner
Copy Paper Size: Maximum
A3/11" x 17" (1st/2nd Tray, By-pass)
B4/8 ½” x 14” (3rd Tray)
Minimum
B5/8 ½” x 11” lengthwise (1st Paper Tray)
A5/51/2" x 81/2" sideways (2nd Tray)
B5/8 ½” x 11” (3rd Paper Tray)
A6/51/2" x 81/2" lengthwise (By-pass)
Tandem Paper Tray (1st Tray)
A4/B5/8 ½” x 11” sideways only
Duplex Copying: Maximum A3/11" x 17"
Minimum A5/51/2" x 81/2" lengthwise
Copy Paper Weight: Paper tray: 52.3 ~ 127.9 g/m2, 14 ~ 34 lb
Bypass feed table: 52.3 ~ 163 g/m2, 17 ~ 43 lb
Duplex copying: 64 ~ 104.7 g/m2, 17 ~ 28 lb
Reproduction Ratios: 6 reduction and 5 enlargement
Metric Version Inch Version
Enlargement 400%
200%
141%
122%
115%
400%
200%
155%
129%
121%
Full Size 100% 100%
Reduction 93%
82%
75%
71%
65%
50%
93%
85%
78%
73%
65%
50%

SPECIFICATIONS June 30, 1998
1-2
Zoom: 32 ~ 400%
Copy Speed: Max. 65 cpm (A4 / 8 ½” x 11” sideways)
Resolution: Scanning: 400 dpi
Printing: 400 dpi
600 dpi (Printer Mode Only)
Gradation: 256 levels
Warm-up Time: Less than 330 s (from Off-mode)
Less than 30 s (from Low Power Mode)
First Copy Time:
(1st Tray) Less than 3.7 s (Face up mode) Less than 5.5 s (Face down mode)
Copy Number Input: Ten-key pad, 1 to 999
Copy Paper Capacity: Tray 1: 1000 sheets(when used as a tandem tray)
Tray 2: 550 sheets
Tray 3 (LCT): 1500 sheets
By-pass Tray: 50 sheets
Copy Tray Capacity:
(Output Tray) A4/8 ½” x 11” : 500 sheets (100 µm thickness paper)
A3/11" x 17" : 250 sheets
Memory Capacity: RAM: 12MB
HDD: 1.7GB
Toner Replenishment: Cartridge exchange (1220g/ cartridge)
Toner Yield: 40k copies
(A4 sideways, 6% full black, 1 to 3 copying, including
toner recycling ratio 20%)
Power Source: North America:
120V, 60Hz, 20A
Europe/Asia:
220 ~ 240 V, 50Hz/60Hz, 10A

June 30, 1998 SPECIFICATIONS
1-3
Overall
Information
Power Consumption: A229 copier (120 V Model)
Copier only Full system*
Warm-up About 1.290 kW About 1.310 kW
Stand-by About 0.235 kW About 0.255 kW
Copying About 1.560 kW About 1.650 kW
Maximum Less than 1.75 kW Less than 1.75 kW
Energy Saver About 0.210 kW About 0.230 kW
Low Power About 0.205 kW About 0.225 kW
Off Mode About 0.017 kW About 0.017 kW
A229 copier (220 to 240 V Model)
Copier only Full system*
Warm-up About 1.250 kW About 1.270 kW
Stand-by About 0.245 kW About 0.260 kW
Copying About 1.500 kW About 1.600 kW
Maximum Less than 1.75 kW Less than 1.75 kW
Energy Saver About 0.220 kW About 0.235 kW
Low Power About 0.215 kW About 0.230 kW
Off Model About 0.017 kW About 0.017 kW
*Full System:
Mainframe with LCT and Finisher
Noise Emission:
Sound Power Level: The measurements were made in accordance with ISO 7779 at
the operator position.
Copier only Full system
Stand-by Less than 50 dB(A) Less than 50 dB(A)
Copying (ADF 1 to 1) Less than 72 dB(A) Less than 72 dB(A)
Copying (From Memory) Less than 71 dB(A) Less than 71 dB(A)
Sound Pressure Level: The measurements were made in accordance with ISO 7779.
Copier only Full system
Stand-by Less than 40 dB(A) Less than 40 dB(A)
Copying (ADF 1 to 1) Less than 60 dB(A) Less than 61 dB(A)
Copying (From Memory) Less than 59 dB(A) Less than 59 dB(A)

SPECIFICATIONS June 30, 1998
1-4
Dimensions:
(W x D x H) 690 x 750 x 1138 mm (27.2” x 29.5” x 44.8”) (without ADF right exit tray, and options)
Weight: 188 kg (without options)
Optional Equipment: •Output tray (A814-01)
•Finisher (A697)
•Large capacity tray (A698)
•Punch unit (A812)
1.1.2 ADF
Original Size: Normal Original Mode:
A3 to B6, DLT to HLT
Thin Original Mode:
A3 to B6 sideways, DLT to HLT
Duplex Original Mode:
A3 to B5, DLT to HLT
Original Weight: Normal Original Mode: 52 ~ 128 g/m2, 14 ~ 34 lb
Thin Original Mode: 40 ~ 128 g/m2, 11 ~ 34 lb
Duplex Original Mode: 52 ~ 105 g/m2, 14 ~ 28 lb
Table Capacity: 100 sheets (80 g/m2, 20 lb)
Original Standard Position: Rear left corner
Separation: FRR
Original Transport: One flat belt
Original Feed Order: From the top original
Power Source: DC 24V from the copier
Power Consumption: 70 W
Dimensions (W x D x H): 680 x 529.5 x 150 mm

June 30, 1998 MACHINE CONFIGURATION
1-5
Overall
Information
1.2 MACHINE CONFIGURATION
Item Machine Code No.
Mainframe A229 3
Output Tray A814 - 01 2
Finisher A697 1
Large Capacity Tray A698 4
Punch Unit (Option for Finisher) A812-17 (3 holes)
A812-27 (2 holes)
A229V501.WMF
1
2
34

MECHANICAL COMPONENT LAYOUT June 30, 1998
1-6
1.3 MECHANICAL COMPONENT LAYOUT
1.3.1 COPIER ENGINE
A229V507.WMF
30
26
24
23
22
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25
27
28
29
16
13
1211
9
8
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65
41014 15
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343536
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June 30, 1998 MECHANICAL COMPONENT LAYOUT
1-7
Overall
Information
1. 3rd Mirror
2. 2nd Mirror
3. 1st Mirror
4. Exposure Lamps
5. LD Unit
6. Cylindrical Lens
7. Polygonal Mirror
8. Cleaning Brush
9. Quenching Lamp
10. Barrel Toroidal Lends (BTL)
11. F-theta Mirror
12. SBU
13. Charge Corona Unit
14. Shield Glass
15. Laser Synchronization Detector
16. Optics Cooling Fan Motor
17. Drum Cleaning Blade
18. Drum Potential Sensor
19. Drum
20. Pick-off Pawl
21. Development Unit
22. TD Sensor
23. Pick-up Roller
24. Feed Roller (By-pass Tray)
25. Separation Roller
26. Registration Rollers
27. Transfer Belt Unit
28. Relay Roller
29. Vertical Transport Rollers
30. Feed Roller
31. Separation Roller
32. Tray 1 (Tandem Tray)
33. Tray 2 (550-sheet Tray)
34. Tray 3 (1500-sheet lage capacity
tray)
35. Pick-up Roller
36. Duplex Feed Roller
37. Duplex Transport Rollers
38. Reverse Trigger Roller
39. Inverter Unit Paper Exit Roller
40. Inverter Feed Roller
41. Pressure Roller
42. Transport Rollers
43. Paper Exit Rollers
44. Curl Correction Roller
45. Hot Roller

MECHANICAL COMPONENT LAYOUT June 30, 1998
1-8
1.3.2 ADF
1. Separation Roller
2. Feed Belt
3. Pick-up Roller
4. Bottom Plate
5. Original Tray
6. Upper Tray Exit Roller
7. Inverter Gate
8. Inverter Guide Roller
9. Inverter Sensor
10. Right Tray Exit Roller
11. Right Exit Tray
12. Exit Gate
13. Inverter Roller
14. Exit Sensor
15. Upper Exit Tray
16. Transport Belt
17. Registration Sensor
18. Lower Transport Roller
19. Width Sensor
20. Upper Transport Roller
21. Entrance Sensor
A229V506.WMF
1689
10
11
12
13
15
16
18
19
20
21
234
17 14
7
5

June 30, 1998 PAPER PATH
1-9
Overall
Information
1.4 PAPER PATH
1. ADF
2. By-pass Tray
3. Optional LCT
4. Tray 3 (1500-sheet LCT)
5. Tray 2 (550-sheet Tray)
6. Tray 1 (Tandem Tray)
7. Duplex Unit
8. Finisher
9. Inverter Unit
10. Shift Tray
11. Upper Tray
A229V504.WMF
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COPY PROCESS June 30, 1998
1-10
1.5 COPY PROCESS
1. EXPOSURE
Two xenon lamps expose the original. Light reflected from the original passes to
the CCD, where it is converted into an analog data signal. This data is converted to
a digital signal, processed, and stored in the memory. At the time of printing ,the
data is retrieved and sent to the laser diode. For multi-copy runs, the original is
scanned once only and stored to the hard disk.
2. DRUM CHARGE
An OPC (organic photoconductor) drum is used in this machine. In the dark, the
charge corona unit gives a negative charge to the drum. The grid plate ensures
that corona charge is applied uniformly. The charge remains on the surface of the
drum because the OPC layer has a high electrical resistance in the dark.
3. LASER EXPOSURE
The processed data from the scanned original is retrieved from the hard disk and
transferred to the drum by two laser beams, which form an electrostatic latent
image on the drum surface. The amount of charge remaining as a latent image on
the drum depends on the laser beam intensity, which is controlled by the SBICU
board.
A229V508.WMF
A229V510.WMF
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4

June 30, 1998 COPY PROCESS
1-11
Overall
Information
4. DRUM POTENTIAL SENSOR
The drum potential sensor detects the electric potential on the drum to correct
various process control elements.
5. DEVELOPMENT
The magnetic developer brush on the development rollers comes in contact with
the latent image on the drum surface. Toner particles are electrostatically attracted
to the areas of the drum surface where the laser reduced the negative charge on
the drum.
6. IMAGE TRANSFER
Paper is fed to the area between the drum surface and the transfer belt at the
proper time to align the copy paper and the developed image on the drum. Then,
the transfer bias roller applies a high positive charge to the reverse side of the
paper through the transfer belt. This positive charge pulls the toner particles from
the drum to the paper. At the same time, the paper is electrically attracted to the
transfer belt.
7. PAPER SEPARATION
Paper separates from the drum as a result of the electrical attraction between the
paper and the transfer belt. The pick-off pawls also help separate the paper from
the drum.
8. ID SENSOR
The laser forms a sensor pattern on the drum surface. The ID sensor measures the
reflectivity of the pattern. The output signal is one of the factors used for toner
supply control.
9. CLEANING
The cleaning brush removes toner remaining on the drum after image transfer and
the cleaning blade scrapes off all remaining toner.
10. QUENCHING
The light from the quenching lamp electrically neutralizes the charge on the drum
surface.

DRIVE LAYOUT June 30, 1998
1-12
1.6 DRIVE LAYOUT
1.6.1 COPIER ENGINE
1. Drum Motor
2. Scanner Motor
3. Fusing/Duplex Motor
4. Toner Recycling Clutch
5. Paper Feed Motor
6. Toner Collection Motor
7. Registration Motor
8. Relay Clutch
9. By-pass Feed Motor
10. By-pass Feed Clutch
11. Development Motor
!Cleaning Unit
"Scanner Unit
#Transfer Belt Unit
$Fusing Unit
%Duplex Unit
&Paper Feed Units
'Toner Hopper
(Development Unit
)Drum
A229V505.WMF
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June 30, 1998 DRIVE LAYOUT
1-13
Overall
Information
1.6.2 ADF
1. Pick-up Motor
2. Bottom Plate Motor
3. Feed-in Motor
4. Transport Motor
5. Upper Exit Roller
6. Feed-out Motor
7. Right Exit Roller
8. Transport Belt
9. Lower Transport Roller
10. Upper Exit Roller
11. Separation Roller
12. Feed Belt
13. Pick-up Roller
C229V511.WMF
1234
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10 11 12 13

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998
1-14
1.7 ELECTRICAL COMPONENT DESCRIPTION
Refer to the electrical component layout on the reverse side of the point-to-point
diagram for the location of the components using the symbols and index numbers.
1.7.1 COPIER ENGINE
Symbol Name Function Index
No.
Motors
M1 Scanner Drives the 1st and 2nd. 17
M2 Polygonal Mirror Turns the polygonal mirror. 25
M3 LD Positioning Rotates the LD unit to adjust the LD
beam pitch when a different resolution
is selected.
29
M4 Drum Drives the drum and cleaning unit. 39
M5 Development Drives the development unit. 40
M6 Toner Supply Rotates the toner bottle to supply
toner to the development unit. 48
M7 Charge Corona Wire
Cleaner Drives the charge corona wire cleaner. 90
M8 Fusing/Duplex Drives the fusing unit, duplex unit,
inverter unit, and paper exit rollers. 37
M9 Toner Collection Transports the collected toner to the
toner collection bottle. 5
M10 Toner Recycling Drives the air pump to send recycled
toner to the development unit. 8
M11 Paper Feed Drives all feed and transport rollers in
the paper tray unit. 46
M12 1st Tray Lift Raises and lowers the bottom plate in
the 1st paper tray. 44
M13 2nd Tray Lift Raises the bottom plate in the 2nd
paper tray. 45
M14 3rd Tray Lift Raises and lowers the bottom plate in
the 3rd paper tray. 135
M15 By-pass Feed Drives the by-pass feed rollers. 43
M16 Registration Drives the registration rollers. 42
M17 Rear Fence Drive Moves the paper stack in the left
tandem tray to the right tandem tray. 72
M18 Side Fence Drive Opens and closes the front and rear
side fences of the tandem tray. 77
M19 Jogger Drives the jogger fences to square the
paper stack in the duplex unit. 80
M20 Optics Cooling Fan Removes heat from the optics unit. 24
M21 Polygonal Mirror
Motor Cooling Fan Removes heat from around the polygonal mirror motor. 49
M22 Exhaust Fan Removes heat from around the fusing
unit. 38

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION
1-15
Overall
Information
Symbol Name Function Index
No.
M23 Fusing Fan Removes heat from around the fusing
unit. 50
M24 Duplex Cooling Fan Removes heat from around the duplex
unit. 47
M25 PSU Cooling Fan Removes heat from around the PSU. 59
Magnetic Clutches
MC1 Toner Supply Turns the toner supply roller to supply
toner to the development unit. 41
MC2 Toner Recycling Drives the toner recycling unit. 2
MC3 1st Paper Feed Starts paper feed from tray 1. 112
MC4 2nd Paper Feed Starts paper feed from tray 2. 115
MC5 3rd Paper Feed Starts paper feed from tray 3. 12
MC6 By-pass Feed Starts paper feed from the by-pass
table. 100
MC7 Duplex Transport Drives the duplex transport rollers to
transport the paper to the duplex feed
rollers.
67
MC8 Duplex Feed Starts paper feed out of the duplex
tray back into the machine via to the
relay rollers.
70
MC9 1st Vertical Relay Drives the 1st vertical transport
rollers. 113
MC10 2nd Vertical Relay Drives the 2nd vertical transport
rollers. 116
MC11 3rd Vertical Relay Drives the 3rd vertical transport
rollers. 119
MC12 Relay Drives the relay rollers. 103
Switches
SW1 Main Power Provides power to the machine. If this
is off, there is no power supplied to
the machine.
11
SW2 Operation Provides power for machine
operation. The machine still has
power if this switch is off.
30
SW3 Front Door Safety
Switch 1 Cuts the +5 V LD dc power line. 12
SW4 Front Door Safety
Switch 2 Detects if the front door is open or not, and cuts the +24 V dc power line. 13
SW5 Front Door Safety
Switch 3 Cuts the +5 V LD dc power line. 14
SW6 Lower Front Door
Safety Cuts the +24 V dc power line. 10
SW7 Toner Collection
Bottle Set Detects if the toner collection bottle is set or not. 7
SW8 Toner Overflow Detects when the toner collection
bottle is full. 6

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998
1-16
Symbol Name Function Index
No.
SW9 Paper Size Determines the size of paper in tray 2. 3
SW10 3rd Tray Down Lowers the tray 3 (LCT) bottom plate 136
SW11 By-pass Tray Detects if the by-pass tray is open or
closed. 97
Solenoids
SOL1 Transfer Belt Lift Controls the up-down movement of
the transfer belt unit. 92
SOL2 1st Pick-up Controls the up-down movement of
the pick-up roller in tray 1. 111
SOL3 2nd Pick-up Controls the up-down movement of
the pick-up roller in tray 2. 117
SOL4 3rd Pick-up Controls the up-down movement of
the pick-up roller in tray 3. 121
SOL5 By-pass Pick-up Controls the up-down movement of
the pick-up roller for by-pass feed. 98
SOL6 1st Separation Roller Controls the up-down movement of
the separation roller in tray 1. 114
SOL7 2nd Separation Roller Controls the up-down movement of
the separation roller in tray 2. 118
SOL8 3rd Separation Roller Controls the up-down movement of
the separation roller in tray 3. 122
SOL9 Tandem Lock Releases the left tandem feed tray so
that it can be separated from the right
tandem feed tray.
4
SOL10 Duplex Inverter Gate Moves the junction gate to direct
copies to the duplex tray or to the
paper exit.
82
SOL11 Reverse Roller Controls the up-down movement of
the reverse trigger roller. 81
SOL12 Guide Plate Opens the guide plate when a paper
misfeed occurs around this area. 102
SOL13 Inverter Gate Opens the inverter gate during a
duplex job. 96
Sensors
S1 Scanner HP Informs the CPU when the 1st and
2nd scanners are at home position. 35
S2 Original Width Detects original width. This is one of
APS (Auto Page Select) sensors. 36
S3 Original Length 1 Detects original length. This is one of
APS (Auto Page Select) sensors. 18
S4 Original Length 2 Detects original length. This is one of
APS (Auto Page Select) sensors. 20
S5 LD Unit Home
Position Informs the CPU when the LD unit is at home position. 28
S6 Drum Potential Detects the drum surface potential. 88

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION
1-17
Overall
Information
Symbol Name Function Index
No.
S7 Toner Density (TD) Detects the amount of toner in the
developer. 95
S8 Image Density (ID) Detects the density of the ID sensor
pattern on the drum. 91
S9 Toner End Detects toner end. 94
S10 Toner Collection
Motor Monitors the toner collection motor. 9
S11 Toner Recycling Monitors the toner recycling and
collection unit operation. 1
S12 1st Paper Feed Controls the 1st paper feed clutch
off/on timing and the 1st pick-up
solenoid off timing.
129
S13 2nd Paper Feed Controls the 2nd paper feed clutch
off/on timing and the 2nd pick-up
solenoid off timing.
126
S14 3rd Paper Feed Controls the 3rd paper feed clutch
off/on timing and the 3rd pick-up
solenoid off timing.
125
S15 1st Tray Lift Detects when the paper in tray 1 is at
the correct height for paper feed. 132
S16 2nd Tray Lift Detects when the paper in tray 2 is at
the correct height for paper feed. 128
S17 3rd Tray Lift Detects when the paper in tray 3 is at
the correct height for paper feed. 123
S18 1st Paper End Informs the CPU when tray 1 runs out
of paper. 130
S19 2nd Paper End Informs the CPU when tray 2 runs out
of paper. 127
S20 3rd Paper End Informs the CPU when tray 3 runs out
of paper. 124
S21 By-pass Paper End Informs the CPU that there is no
paper in the by-pass feed table. 99
S22 1st Paper Near End Informs the CPU when the paper in
tray 1 is almost finished. 110
S23 2nd Paper Near End Informs the CPU when the paper in
tray 2 is almost finished. 131
S24 3rd Paper Near End Informs the CPU when the paper in
tray 3 is almost finished. 133
S25 Rear Fence HP Informs the CPU when the tandem
tray rear fence is in the home position. 79
S26 Rear Fence Return Informs the CPU when the tandem
tray rear fence is in the return
position.
78
S27 Side Fence Close Detects whether the tandem tray side
fence is closed or not. 75
S28 Side Fence
Positioning Informs the CPU when the tandem tray side fences are open. 74