Ricoh Grand Kingfisher A245 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 the optional tray heater and the optional anti-condensation
heaters 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.
HEALTH SAFETY CONDITIONS
1. 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.
SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
1. Do not incinerate toner cartridges or used toner. Toner dust may ignite
suddenly when exposed to 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.

Grand Kingfisher
(Machine Code:A245)
Service Manual
–
Insert Version –
The A245 copier is based on the A219 copier.
Only the differences from the A219 copier are described in the
following pages. Refer to the A219 copier service manual
regarding the other information.

1. SPECIFICATIONS
NOTE: Only items marked with ✽are different from the A219 copier.
Configuration: Desktop
Copy Process: Dry electrostatic transfer system
Originals: Sheet/Book
Original Size: Maximum: A3/11" x 17"
Copy Paper Size: Maximum: A3/11" x 17"
Minimum:
A5/51/2" x 81/2" sideways (Paper tray feed)
A6/51/2" x 81/2" lengthwise (By-pass feed)
Non-standard sizes:
Vertical 45 mm ~ 308 mm, 1.8" ~ 12"
Horizontal 148 mm ~ 432 mm, 5.8" ~ 17"
Copy Paper Weight: Paper tray feed: 64 to 90 g/m2, 17 to 24 lb
By-pass feed: 52 to 157 g/m2, 14 to 42 lb
Reproduction Ratios:
Zoom: From 50% to 200% in 1% steps
✽Copying Speed: 18 copies/minute (A4/8.5" x 11" sideways)
10 copies/minute (A3/11" x 17")
✽Warm-up Time: 120 V machines: Less than 35 seconds (at 23°C)
230 V machines: Less than 45 seconds (at 23°C)
✽First Copy Time: Less than 6.5 seconds (A4/8.5" x 11" sideways)
Copy Number Input: Number keys, 1 to 99
Manual Image Density
Selection: 7 steps
Metric Version Inch Version
Enlargement 200% 141%
122%
200%
155%
129%
Full Size 100% 100%
Reduction
93%
82%
71%
50%
93%
74%
65%
50%
Copier
26 September 1997 SPECIFICATIONS
1

Automatic Reset: 1 minute standard setting; can also be set to 3
minutes or no auto reset
✽Paper Capacity: Paper tray: 250 sheets or less than 30 mm stack
height
By-pass feed entrance:
Toner Replenishment: Bottle exchange (215 g/bottle)
Copy Tray Capacity: 100 sheets
Power Source: 120 V/60 Hz: More than 15 A (for North America)
220 ~ 240 V/50 Hz: More than 8 A (for Europe)
220 V/50 Hz: More than 8 A (for Asia)
220 V/60 Hz: More than 8 A (for Middle East/Asia)
110 V/60 Hz: More than 15 A (for Taiwan)
127 V/60 Hz: More than 15 A (for Middle East)
✽Power Consumption:
✽Dimensions:
Copier only Full system*
Maximum
1.4 kW
(120 V machines) 1.5 kW (120 V machines)
1.1 kW
(230 V machines) 1.2 kW (230 V machines)
Copy cycle 0.82 kW 0.85 kW
Warm-up 0.95 kW 0.95 kW
Stand-by 0.16 kW 0.16 kW
Energy saver 0.12 kW 0.12 kW
*Full system: Copier with document feeder and 10-bin sorter
Width Depth Height
Copier 579 mm
(22.8") 560 mm (22.1") 465 mm (183.8")
Full system* 775 mm
(30.2") 560 mm (22.1") 563 mm (21.5")
*Full system: Copier with document feeder and 10-bin sorter
Standard paper 80 sheets
OHP 10 sheets
Others 1 sheet
SPECIFICATIONS 26 September 1997
2

✽Noise Emissions: Sound pressure level (the measurements are
made in accordance with ISO 7779 at the
operator position.)
Sound power level (the measurements are made
in accordance with ISO 7779)
✽Weight:
Optional Equipment:
(Sales items) Document feeder (A662) 10-bin sorter (A657)
Optional Equipment:
(Service items) Optics anti-condensation heater Tray heater
•Specifications are subject to change without
notice.
Copier only Full system*
Copying 58 dB or less 62 dB or less
*Full system: Copier with document feeder and 10-bin sorter
Copier only Full system*
Stand-by 40 dB or less 40 dB or less
Copy cycle 64 dB or less 68 dB or less
*Full system: Copier with document feeder and 10-bin sorter
Copier only 45 kg (99.2 lb)
Full system* 58 kg (128 lb)
*Full system: Copier with document feeder and 10-bin sorter
Copier
26 September 1997 SPECIFICATIONS
3

2. MECHANICAL COMPONENT LAYOUT
NOTE: The paper feed area has been changed.
710
98654321
16
15
14
13
12
11
17
18
28
29
26
27
25
21
24 23 22 1920 A245V500.wmf
1. 2nd Mirror
2. 1st Mirror
3. Exposure Lamp
4. Hot Roller
5. Lens
6. Quenching Lamp
7. Charge Corona Unit
8. 6th Mirror
9. Erase Lamp
10. 4th Mirror
11. 5th Mirror
12. Toner Bottle Holder
13. By-pass Feed Roller
14. By-pass Feed Table
15. Upper Relay Rollers
16. Upper Tray Paper Feed
Rollers
17. Lower Relay Rollers
18. Lower Tray Paper Feed
Rollers
19. Registration Rollers
20. Development Roller
21. Transfer/Separation Unit
22. Drum
23. Cleaning Blade
24. Pressure Roller
25. Lower Paper Tray
26. Upper Paper Tray
27. Copy Tray
28. Exit Rollers
29. 3rd Mirror
MECHANICAL COMPONENT LAYOUT 26 September 1997
4

3. DRIVE LAYOUT
NOTE: The paper feed area has been changed.
1
2
11
10
9
8
54 3
13
12
6
7
A245V501.wmf
1. Lens Motor
2. Fusing Unit Drive Gear
3. Main Motor
4. Drum Drive Gear
5. Lower Tray Paper Feed Clutch Gear
6. Upper Tray Paper Feed Clutch Gear
7. Lower Relay Roller Clutch Gear
8. Upper Relay Roller Clutch Gear
9. By-pass Paper Feed Clutch
10. Registration Clutch Gear
11. Toner Supply Motor
12. 4th/5th Mirror Motor
13. Scanner Drive Motor
Copier
26 September 1997 DRIVE LAYOUT
5

4. PAPER PATH
NOTE: The paper feed area has been changed.
1
3
4
2A245V502.wmf
1. By-pass Feed
2. Lower Paper Tray Feed
3. Upper Paper Tray Feed
4. Copy Tray
PAPER PATH 26 September 1997
6

5. ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout and the point-to-point diagram on the
waterproof paper in the pocket for symbols and index numbers.
Symbol Name Function Index No.
Motors
M1 Main Motor Drives all the main unit components except for
the optics unit and fans. 8
M2 Scanner Drive Motor Drives the scanners (1st and 2nd). 9
M3 Lens Motor Moves the lens position in accordance with
the selected magnification. 20
M4 4th/5th Mirror Motor Moves the 4th/5th mirror position in
accordance with the selected magnification. 18
M5 Toner Supply Motor Rotates the toner bottle to supply toner to the
development unit. 10
M6 Optics Cooling Fan
Motor Prevents build-up of hot air in the optics cavity. 19
M7 Exhaust Fan Motor Removes heat from around the fusing unit and blows the ozone built up around the charge
corona unit towards the ozone filter. 7
Clutches
CL1 Upper Tray Paper
Feed Clutch Transfers main motor drive to the upper paper feed roller. 13
CL2 By-pass Paper Feed
Clutch Starts paper feed from the by-pass feed table. 12
CL3 Lower Tray Paper
Feed Clutch Transfers main motor drive to the lower paper feed roller. 16
CL4 Registration Clutch Drives the registration rollers. 11
CL5 Upper Relay Roller
Clutch Drives the upper relay rollers for upper paper tray feed. 14
CL6 Lower Relay Roller
Clutch Drives the lower relay rollers for lower paper tray feed. 15
Switches
SW1 Main Switch Supplies power to the copier. 43
SW2 Interlock Switch Cuts all power when the front cover is opened. 42
SW3 Upper Tray Paper
Size Switch Determines what size of paper is in the upper paper tray. 36
SW4 Right Vertical Guide
Switch Cuts the +24 V dc power line of the relay roller clutch. 30
SW5 Lower Tray Paper
Size Switch Determines what size of paper is in the lower paper tray. 35
Sensors
S1 4th/5th Mirror Home Position Sensor Informs the CPU when the 4th/5th mirror assembly is at the home position (full size
position). 28
Copier
26 September 1997 ELECTRICAL COMPONENT DESCRIPTIONS
7

Symbol Name Function Index No.
S2 ADS Sensor Detects the background density of the original. 26
S3 Upper Tray Paper
End Sensor Informs the CPU when the upper paper tray runs out of paper. 31
S4 Registration Sensor Detects the leading edge of the copy paper to determine the stop timing of the relay roller
clutch, and detects misfeeds. 34
S5 By-pass Feed Paper
End Sensor Informs the CPU when there is no paper in the by-pass tray. 33
S6 Exit Sensor Detects misfeeds. 25
S7 Scanner Home
Position Sensor Informs the CPU when the 1st scanner is at the home position. 45
S8 Lens Home Position
Sensor Informs the CPU when the lens is at the home position. 24
S9 Toner Density (TD)
Sensor Detects the ratio of toner to carrier in the developer. 29
S10 Lower Tray Paper
End Sensor Informs the CPU when the lower paper tray runs out of paper. 32
Printed Circuit Boards
PCB1 Main Control Board Controls all copier functions. 1
PCB2 High Voltage Supply Board - C/G/B/T/S Provides high voltage to the charge corona, grid, development bias, transfer corona, and
discharge plate. 2
PCB3 AC Drive/DC Power Supply Board Drives the exposure lamp, fusing lamp, and main motor. Rectifies 30 Vac and 8 Vac input
and outputs 5 Vdc and 24 Vdc. 3
PCB4 Operation Panel
Board Informs the CPU of the selected modes and displays the situation on the panel. 6
Lamps
L1 Erase Lamp Discharges the drum outside of the image area. (Provides leading/trailing edge and side
erases.) 4
L2 Quenching Lamp Neutralizes any charge remaining on the drum
surface after cleaning. 5
L3 Exposure Lamp Applies high intensity light to the original for
exposure. 22
L4 Fusing Lamp Provides heat to the hot roller. 27
Others
CO1 Total Counter Keeps track of the total number of copies
made. 39
H1 Upper Tray Heater
(Option) Turns on when the main switch is off to keep paper in the upper paper tray dry. 38
H2 Optics
Anti-condensation
Heater (Option)
Turns on when the main switch is off to
prevent moisture from accumulating in the
optics. 44
ELECTRICAL COMPONENT DESCRIPTIONS 26 September 1997
8

Symbol Name Function Index No.
H3 Lower Tray Heater
(Option) Turns on when the main switch is off to keep paper in the lower paper tray dry. 37
TF1 Exposure Lamp
Thermofuse Provide back-up overheat protection around the exposure lamp. 23
TF2 Fusing Thermofuse Provide back-up overheat protection in the
fusing unit. 41
TH1 Fusing Thermistor Monitors the temperature around the exposure
lamp for overheat protection. 40
TH2 Optics Thermistor Monitors the temperature around the exposure
lamp for overheat protection. 21
TR Transformer Steps down the wall voltage to 30 Vac and 8
Vac. 17
Copier
26 September 1997 ELECTRICAL COMPONENT DESCRIPTIONS
9

6. PAPER FEED
6.1 OVERVIEW
There are two paper trays and a by-pass feed table [A].
The upper [B] and lower [C] paper trays each hold 250 sheets. The by-pass
feed table can hold 1, 10, or 80 sheets of paper, depending on the paper type.
The semicircular feed rollers [D] drive the top sheet of paper from the tray to
the registration rollers [E] through the relay rollers [F].
The tray has two corner separators (see [F] in the diagram in the "Paper Lift
Mechanism" section), which allow only one sheet to feed at a time. The
corner separators, along with the tray’s springs, also serve to set the height
of the paper stack.
When the tray is closed after the paper is loaded, the paper size actuator
located at the front right of the tray pushes the paper size sensor. This
informs the cpu what paper size is loaded in the tray and that the tray is in
place.
The by-pass feed table uses a feed roller and friction pad system to feed the
top sheet of paper to the registration rollers.
In humid environments, copy paper may crease as it comes out of the fusing
unit. The optional tray heaters [G] are available as service parts to keep copy
paper dry. It can be installed for both paper trays.
[A]
[F]
[D]
[B]
[C]
[G]
[E]
A245D500.wmf
PAPER FEED 26 September 1997
10

6.2 PAPER LIFT MECHANISM
When the paper tray [A] is closed after paper is loaded, the release slider [B],
which is mounted on the bottom part of the tray, is pushed by the projection
[C] on the main frame and the release slider comes off the bottom plate hook
[D].
Once the release slider comes off, the bottom plate is raised by the pressure
springs [E] and the top sheet pushes up the corner separators [F]. This keeps
the stack of paper at the correct height.
[F]
[D]
[E]
[C]
[B]
[A]
[F]
A245D501.wmf
Copier
26 September 1997 PAPER FEED
11

6.3 PAPER FEED AND DRIVE MECHANISM
Through several gears and a timing belt, main motor rotation is transmitted to
the tray paper feed clutch gear [A] and the relay roller clutch gear [B].
-Feed rollers-
The tray paper feed clutch gear is on the same shaft as the semicircular
feed rollers [C]. After the ! key is pressed, the tray paper feed clutch [D] is
energized for 250 milliseconds to release the stopper [E]. Then main motor
drive is transmitted, and the feed rollers make one complete rotation to feed
the top sheet of paper, which is enough for the leading edge of the paper to
be caught by the relay rollers [F]. The feed rollers stop when the stopper
drops back into the notch at the end of one complete turn.
-Relay rollers-
The relay roller clutch gear is on the same shaft as the relay rollers. The
rotation timing of the relay rollers is controlled by the relay roller clutch [G].
The CPU energizes the relay roller clutch after the ! key is pressed (at the
same time as the tray paper feed clutch). Paper is fed from the relay rollers to
the registration rollers.
[A]
[E]
[D]
[C]
A245D502.wmf
[B]
[G]
[F]
A245D503.wmf
PAPER FEED 26 September 1997
12

6.4 PAPER FEED AND MISFEED DETECTION TIMING
The registration sensor and the exit sensor are used for misfeed detection. If
the CPU detects a misfeed, the Check Paper Path and the Location
indicators turn on.
Just after the main switch is turned on, the CPU checks these sensors for
any jammed paper.
During the copy cycle, the CPU performs four kinds of misfeed detection. The
following explains jam detection timing for copying on A4 sideways paper
from the upper paper tray unit.
A (1): Checks whether the registration sensor is actuated within 2.05
seconds after the main motor starts rotating.
A
(2): Checks whether the exit sensor is actuated within 4.48 seconds after
the main motor starts rotating.
A
(3): Checks whether the copy paper has passed through the registration
sensor 6.50 seconds after the main motor starts rotating.
A
(4): Checks whether the copy paper has passed through the exit sensor
6.78 seconds after the main motor starts rotating.
NOTE:
A
(1) and
A
(2) are detected from the leading edge of the copy
paper.
A
(3) and
A
(4) are detected from the trailing edge of the
copy paper. The detection timing for
A
(3) and
A
(4) will vary with
the copy paper size in use.
Start Key
Main Motor
Upper Tray
Paper Feed Clutch
Upper Relay Roller
Clutch
Registration Clutch
Registration Sensor
Exit Sensor
0
0.30 0.55
0.10
2.13
2.05
4.48
6.50
6.78
(seconds)
0.30
A
(3)
A
(4)
A
(1)
A
(2)
A4 sideways
A245D508.wmf
Copier
26 September 1997 PAPER FEED
13

7. IMAGE FUSING
1. Both the hot roller and pressure roller for the A245 are different from the
A219. To distinguish between the two types of roller, check the end of the
roller shaft as described below.
HOT ROLLER
PRESSURE ROLLER
2. Due to the increase in copier CPM, the thickness of the metal core of the
hot roller has been increased for the A245 copier. This causes the ready
temperature to be higher, and the temperatures are as follows:
A245 copier A219 copier
172°C: 120 V machines 165°C: 120 V machines
177°C: 230 V machines 172°C: 230 V machines
Also, to achieve the same warm-up time as for the A219 copier in the 230 V
machines, the fusing lamp wattage has been increased from 650 W to 760 W.
For the 120 V machine, the warm-up time specification is slightly longer than
for the A219, so the lamp is not changed.
3. FUSING IDLING (SP116)
Fusing idling can be selected with SP116. This mode should be used
when the copier has fusing problems with copies which are made soon
after warm up. This problem is most likely to occur in low temperature
locations where the wall outlet condition is also not stable. Please note
that when this mode is selected, copier warm-up will take a couple of
seconds extra, and the first copy time will not be within specification.
When the start key is pressed, fusing idling is performed for 2 seconds. If
the temperature of the fusing unit is below the operating temperature by
up to 10°C, copying starts. If the detected temperature is more than 10°C
lower than the operating temperature, fusing idling will continue until the
detected temperature reaches 180°C. This will take 6 ~ 7 seconds longer
to warm up than if fusing idling is not used.
- A245 -
A245D504.wmf
- A219 -
A245D505.wmf
- A219 -
A245D506.wmf
- A245 -
A245D507.wmf
IMAGE FUSING 26 September 1997
14

8. INSTALLATION
8.1 COPIER ACCESSORY CHECK
Check the quantity and condition of the accessories in the box against the
followings list:
1. Model Name Decal (-10, -22 machines)
2. Symbol Explanation Decal - Multi-language
3. Installation Procedure - Multi-language (-10, -15, -22, -26 machines)
4. Operation Instructions English (-10, -15, -17, -19, -22, -26, -29, -39
machines)
5. NECR - English (-17 machines)
6. NECR - Multi-language (-27, -29, -39 machines)
7. Copy Tray
8. User Survey Card (-17 machines)
9. Paper Set Direction Deal - Multi-language (-22, -26, -27 machines)
Copier
26 September 1997 INSTALLATION
15

8.2 COPIER INSTALLATION PROCEDURE

CAUTION
Do not plug in the power cord before starting the following procedure.
1. Remove all strips of tape shown above.
2. Pull out the paper trays [A], and remove the cardboards [B].
3. Open the platen cover and remove the lock pin [C].
NOTE: Save the lock pin for future shipping.
4. Remove the left side scale [D] (2 screws) and remove the lock pins [E].
NOTE: Save the lock pins for future shipping.
5. Open the front cover and raise the toner bottle holder lever [F].
Then pull down the securing lever [G], and remove the toner bottle holder
[H].
[B]
[A] A245I500.wmf
[D]
[C]
[E] A245I506.wmf
[G]
[F]
[H] A245I501.wmf
INSTALLATION 26 September 1997
16

6. Turn the "B1" lever [A] counterclockwise to lower the transfer corona unit.
7. Remove the knob screw [B] and gently pull out the imaging unit [C].
Then place it on a clean sheet of paper.
8. Remove the cover [D] from the imaging unit (1 screw and 1 snap [E]).
9. Pour in the developer [F] evenly into the imaging unit. Then rotate the
outer gear [G] for one or two turns to distribute the developer as shown.
NOTE: When installing new developer or manually rotating the
development roller, always make sure to turn the gear in the
direction shown above. Also do not rotate the gear more than 3
turns to prevent damage to the unit.
10. Remount the cover on the imaging unit, and install the unit in the copier
(1 knob screw).
[B]
[C]
[A]
A245I502.wmf
[F]
[E]
[D]
[G]
A245I503.wmf
Copier
26 September 1997 INSTALLATION
17

11. Install the toner bottle holder [A] in the copier as shown.
12. Shake the toner bottle [B] well.
NOTE: Do not remove the bottle cap [C] of the toner bottle at this time.
13. Unscrew the bottle cap and insert the toner bottle into the holder, so that
the rib [D] rides the rail [E].
NOTE: Do not open the inner bottle cap [F].
14. Reposition the holder by making sure that the securing lever [G] clicks.
Then press down the holder lever [H] to secure the bottle. Close the front
cover.
[B]
[F]
[C]
[H]
[A]
[D]
[G]
[E]
A245I504.wmf
INSTALLATION 26 September 1997
18