Ricoh FW870 User manual

IMPORTANT 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 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. 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.
6.The copier is not attached to the table. Pushing the copier too heard may
cause it to drop onto the floor. While moving the copier, push the table.
7. When the main switch is tuned on, the machine will suddenly start turning
to perform the developer initialization. Keep hans away from any
mechanical and electrical components during this period.
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.
CAUTION
2. The RAM board on the main control board has a lithium battery
which can explode if replaced incorrectly. Replace the RAM board
only with an identical one. The manufacturer recommends
replacing the entire RAM board. Do not recharge or burn this
battery. Used RAM board must be handled in accordance with
local regulations.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
1. Do not incinerate the toner cartridge or the used toner. Toner dust may
ignite suddenly when exposed to open flame.
2. Dispose of used toner, developer, and organic photoconductor according
to local regulations. (These are non-toxic supplies.)
3. Dispose of replaced parts in accordance with local regulations.
4. When keeping used RAM boards in order to dispose of them later, do not
put more than 100 RAM boards per sealed box. Storing larger numbers
or not sealing them apart may lead to chemical reactions and heat
build-up.

SECTION 1
OVERALL
MACHINE INFORMATION

1. SPECIFICATIONS
Configuration: Console
Copy Process: Electrostatic transfer system
Original Feed: Sheet feed
Original Size: Maximum: 914 x 3,600 (36" x 142")mm
Minimum: 182 x 257 (B5), 81/2" x 11" lengthwise
Copy Size: Same as "Original Size"
Copying Speed: 7.5 cpm (A1/D sideways)
First Copy: 18 seconds (A1/D sideways)
Warm-up Time: Within 6 minutes (Room temperature 23oC)
Multi-Copy: 1 to 10
Automatic Reset: 2 minutes after copying is finished (can be set
to 1, 3, 4, or 5 minutes or to no auto reset)
Photoconductor: Organic photoconductor drum
Drum Charge: Single-wire with grid plate (Negative Charge)
Reproduction Ratio: 1 : 1 (±0.5%)
Exposure System: Slit exposure via fiber optic array
Exposure Lamp: Fluorescent lamp (26 W)
Development: Dual-component dry toner system
Toner Replenishment: Cartridge system (750 g toner/cartridge)
Toner Consumption: 1,860 A1 or D copies per cartridge (6% original)
Development Bias: Negative
Toner Density Control: Direct toner density detection by induction
sensor
Image Density Adjustment: Development bias control + exposure control
Auto Image Density Control: Development bias control + exposure control
Paper Separation: Dual wire ac corona and pick-off pawls
Cleaning: Cleaning blade
Overall
Information
25 July 1996 SPECIFICATIONS
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Paper Feeding: Manual feed and 2 roll feeds
(3rd roll feeder optional)
Image Fusing: Heat and pressure type, teflon (upper) and
silicone rubber (lower) rollers
Fusing Lamp: Halogen lamp
(115 V: 1,100 W, 230 V: 1,100 W)
Self-diagnostic Codes: 18 codes, displayed in copy counter
Power Source: 115 V/60 Hz....12 A
220 V/50 Hz....7 A
230 V/50Hz.....7 A
240 V/50 Hz....7 A
Power Consumption: Maximum: 1.41 kW
Warm-up: 1.21 kW
Ready: 0.1 to 1.2 kW
Copy cycle: 1.36 kW
Dimensions (W x D x H): 1230 x 690 x 1065 mm
48.4" x 27.2" x 41.9"
Weight: 195 kg, 429 lb
Optional Equipment and Machine Configuration
Configuration Additional equipment
Main frame Optional equipment
A174
copier 3rd Roll feeder (A613) –
Side guides (A569) –
Other Optional Equipment
•Paper Spool (Spare parts)
•Key Counter Bracket Set (A902-15)
•Key Counter (Procured locally)
•Key Counter Holder (Procured locally)
Specifications are subject to change without notice.
SPECIFICATIONS 25 July 1996
1-2

2. PAPER PATH
F

,


,



D
A
B
C
E
A174V502.wmf
A: Original Path  ,  ,  ,  :
Switching back
B: Paper from the manual feed
C: Paper from the roller feed
D: Original Path from Rear Feeder
E: Upper Copy Exit
F: Lower Copy Exit
Overall
Information
25 July 1996 PAPER PATH
1-3

3. DRUM PROCESSES
1. Charge
In the dark the charge corona unit applies a negative charge to the drum.
The grid plate ensures the charge is applied uniformly. The charge remains
on the surface of the drum because the photoconductive drum has a high
electrical resistance in the dark.
2. Exposure
High intensity light from a fluorescent lamp is reflected from the moving
original through the fiber optic array. The charge on the drum surface is
dissipated in direct proportion to the intensity of the reflected light, thus
producing an electric latent image on the drum surface.
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A174V503.img
DRUM PROCESSES 25 July 1996
1-4

3. Development
The magnetic developer brush on the development roller comes in contact
with the latent image on the drum surface. Toner particles are
electrostatically attracted to the negatively charged latent image areas.
4. Pre-Transfer Lamp
The pre-transfer lamp (PTL) illuminates the drum prior to image transfer. This
reduces the attraction between the toner and the drum, thus making image
transfer easier.
5. Image Transfer
Copy paper is fed to the drum surface, at the exact timing, to align the copy
paper and the developed image on the drum surface. Then a strong negative
charge is applied to the back side of the paper. The negative charge pulls
the toner particles from the drum surface onto the paper.
6. Paper Separation
A strong ac corona discharge is applied to the back side of the copy paper,
reducing the charge on the paper and breaking the electrostatic attraction
between the paper and the drum. Then, the stiffness of the copy paper
causes it to separate from the drum. The pick-off pawls help to separate
paper which has low stiffness.
7. Cleaning
The cleaning blade, which is angled against drum rotation (counter blade
system), removes any toner remaining on the drum surface.
8. Quenching
The light from the quenching lamp electrically neutralizes the surface of the
drum.
Overall
Information
25 July 1996 DRUM PROCESSES
1-5

4. MECHANICAL COMPONENT LAYOUT
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A174V500.wmf
MECHANICAL COMPONENT LAYOUT 25 July 1996
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1. Original Registration Roller
2. Original Feed Roller
3. Copy Tray
4. Exit Rollers
5. Fusing Exit Rollers
6. Hot Roller
7. Pressure Roller
8. Gas Spring
9. OPC Drum
10. T/S Corona Unit
11. Paper Spool
12. 3rd Roll Feeder
13. Cutter Unit
14. Paper Registration Rollers
15. Manual Feed Table
16. Development Unit
17. Toner Cartridge
18. Charge Corona Unit
19. Original Table
20. Original Exit Rollers
21. Original Repeat Roller
22. Exposure Lamp
23. Fiber Optic Array
24. Platen Roller
25. Cleaning Blade
Overall
Information
25 July 1996 MECHANICAL COMPONENT LAYOUT
1-7