Ricoh FT3320 Installation guide

SERVICE TRAINING
MANUAL
FT3320

Table of Contents
.
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-1
OPERATION PANEL . . . . . . . . . . . ●● “**” *D*” “*””
1-4
COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-6
FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-7
MECHANICAL COMPONENT LAYOUT . . . . . . . . . . . . . . . . . ...1-8
DRIVE IAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-9
ELECTRICAL COMPONENT IAYOUT . . . . . . . . . . . . . . . . . . . . .1-10
ELECTRICAL COMPONENT DESCRIPTIONS . . . . . . . . . . . . ...1-12
AC AND DC POWER DISTRIBUTION . . . . . . . . . . . . . . . . . . ...1-15
OVERALL MACHINE CONTROL . . . . . . . . . . . . . . . . . . . . . . ...1-16
DRUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1
1. SELENIUM DRUM . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1
2. HANDLING THE DRUM . . . . . . . . . . . . . . . . . . .......2-1
DRUM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-2
I. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-2
2. TEMPERATURE COMPENSATION . . . . . . . . . . . . . . ...2-3
3. CORONA WIRE CLEANER . . . . . . . . . . . . . . . . . . . . ...2-4
4. CHARGE CORONA CIRCUIT . . . . . . . . . . . . . . . . . . ...2-5
OPTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-6
I. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-6
2. SCANNER DRIVE MECHANISM . . . . . . . . . . . . . . . . ...2-7
3. SCANNER DRIVE CIRCUIT . . . . . . . . . . . . . . . . . . . . ...2-8
4. EXPOSURE IAMP CONTROL . . . . . . . . . . . . . . . . . . ...2-9
5.0 RIGINAL I. D. SENSING . . . . . . . . . . . . . . . . . . . . . . ...2-l0
6. SERVICE CALL CONDITIONS . . . . . . . . . . . . . . . . . . ...2-11
DEVELOPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-12
1. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-12
2. DRIVE MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . ...2-13
3. SEALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-14
4. CROSS-MIXING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-15
5. IMAGE DENSITY CONTROL . . . . . . . . . . . . . . . . . . . ...2-16
6. BIAS FOR ID SENSING . . . . . . . . . . . . . . . . . . . . . . . ...2-19
7. DEVELOPMENT SET SWITCH . . . . . . . . . . . . . . . . . ...2-20
i

TONER DENSITY DETECTION AND TONER SUPPLY . . . . . ...2-21
1 *
2 ●
3
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4 .
IMAGE
1 ●
2
●
3
.
,
4
●
5
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TONER DENSITY DETECTION . . . . . . . . . . . . . . . . . ...2-21
TONER DENSITY CONTROL . . . . . . . . . . . . . . . . . . . ...2-22
TONER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-23
TONER END DETECTION . . . . . . . . . . . . . . . . . . . . . ...2-25
PAPER
1
●
2.
3
●
4
●
5
●
6
●
7 ●
8
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PAPER
1 .
2 ●
IMAGE
1
●
2 ●
3
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4
9
5
.
6 ●
7 ●
ii

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SECTION 1
OVERALL MACHINE
INFORMATION

SPECIFICATIONS
Configuration:
Copying Process:
Original:
Original Size:
Copy Paper Size:
Copy Paper Weight:
Reproduction Ratio:
Copying Speed:
First Copy Time:
Warm-up Time:
Copy Number Input:
Manual Image Density
Selection:
Automatic Reset:
Paper Feed System:
Exposure System:
Lens:
Light Source:
Desk top (fixed platen)
Dry electrostatic transfer system
Book/sheet
Maximum: A4/811z” x 14”
Maximum: A4/8vz” x 14“
Minimum: A6/5112° x 81I2”
52 to 128 grams (14 lb to 34 lb)
1:1
12 copies/minute (A4/81/2° x 1 1”)
10 copies/minute (81/2” x 14“)
9 seconds (A4/8vz” x 11”)
Approximately 35 seconds (room temp.
20 C/68 F)
Numeral keys, 1 to 99
7 steps (development bias variable)
60 seconds. Quantity entered returns to “1”.
Manual image density
mode returns to Auto ID
mode. Interrupt mode returns to the previous
mode.
Feed and reverse roller.
Cassette feed, 250 sheets. Manual feed, 50
sheets.
Slit exposure, moving optics
Through lens, F10, f= 180 mm
Halogen lamp: 97 v, 300 w (115V)
180 V, 350 W (220/240V)

1 Nov. '87
Photoconductor:
Charge System:
Development System:
Toner Density Control:
Development Bias System:
Toner Replenishment:
Toner Consumption:
Cleaning System:
Quenching System:
Image Transfer:
Paper Separation:
Image Fusing:
Fusing Lamp:
Electronic Control System:
Copy Tray Capacity:
Self-diagnostics:
Power Source:
Average Power
Consumption:
Selenium drum (H type)
Single wire dc corona
Magnetic brush roller
Automatic (photosensor)
Pulse width modulation switching
Cartridge exchange (200 g/cartridge)
Approximately 4,500 copies/cartridge (A4, 7%
original)
Blade and brush
Photo quenching (neon lamp)
Single wire dc corona, pre-transfer lamp
Single wire ac corona and pick-off pawls
Heat and pressure rollers
Halogen lamp (850 W)
Microprocessor
100 sheets (standard copy paper)
8 codes, displayed in the copy counter
110 V/60 Hz . . . . . ..I2 A
115 V/60 Hz . . . . . ..I2 A
220 V/50 Hz . . . . . . . 6 A
240 V/50 Hz . . . . . . . 6 A
220 V/60 Hz . . . . . . . 6 A
Warm-up: 0.89 kW
Stand-by: 0.15 kW
Copying: 0.66 kW
(A4)
Max:
1.3 kW (110 V/l 15 V/220 V)

1 Nov. '87
Dimensions (WXDXH):
580 x 495 x 320 mm
22.8 x 19.5 x 12.6 inches
Weight:
38 kg (83.8 lb)
Optional Equipment: Key counter
●
Additional Cassette
Original Table

1 Nov. '87
1. Check Paper Path Indicator
Indicates that a misfeed has oc-
curred within the copier.
2. Load Paper Indicator
Lights when no paper is in the cas-
sette or the manual feed table
3. Manual ID Indicators
Show the manually selected
density.
4. Add Toner Indicator
image
Lights when it is time to change the
toner cartridge. When continuously
lit, the copier cannot be used until a
new cartridge is installed.
5. Copy Counter
Displays the number of copies
entered. While copying, it shows the
number of copies made.
6. Auto Image Density Indicator
Lights when the copier is automati-
cally controlling image density.
7. Ready Indicator
Lights when the machine is ready
to-make copies.
8. Wait Indicator
Indicates that the machine is not
ready to copy.
9. Manual Feed Indicator
Lights when the manual feed table
is open.

1 NOV. '87
- Letter Version -
10. Number Keys
The number keys are used to enter
the desired number of copies.
11. Interrupt Indicator
Lights when interrupt mode is
selected.
Also lights when the
manual feed table is open.
12. Interrupt Key
Press to make interrupt copies
during a copy run.
13. Start Key
Press to start operation.
14. Clear/Stop Key
Press to cancel the copy number
entered. While copying, press to
stop copy operation.
15. Auto Image Density Key
Press to select/deselect automatic
image density mode.
16. Manual Image Density Keys
Press to make copies lighter or
darker. Use these keys to cancel
automatic control and manually
select the image density level.
Note: The Manual Image Density
indicator or the Auto Image
Density indicator will start
blinking if the ID sensor’s
input becomes abnormal.
1-5

1 Nov. ’87
COPY PROCESS
1-6

1 Nov. '87
FUNCTIONAL OPERATION
1-7.

1 Nov. '87
MECHANICAL COMPONENT LAYOUT
I
I
1 .
2 8
3
1
4●
5
●
6
●
7 .
8
.
9
.
10 .
11 ✎
12
●
13 ●
14 ●
Third Mirror
Second Mirror
First Mirror
Exposure Lamp
Used Toner Tank
Cleaning Unit
Charge Corona Unit
Lens
Selenium Drum
Development Roller
15
16
17
18
19
20
21
22
23
24 .
Toner Cartridge
Manual Feed Table
Pick-up Roller
Reverse Roller
Feed Roller
Registration Roller
T/S Corona Unit
Transport Belt
Hot Roller
Pressure Roller
Paddle Roller
25. Fusing Lamp
Toner Shield Glass
26. Copy Tray
Fourth Mirror
27. Exit Rollers
Toner Agitator

1 Nov. '87
DRIVE LAYOUT
1
2
3
4
5
●
6
.
7 .
8
.
9
.
Paper Lift Drive Gear
Paper Feed Drive Gear
Reverse Roller Drive Gear
Toner Supply Clutch Drive
Gear
Reverse Clutch Drive Gear
Development Roller Drive Gear
Development Roller Gear
Registration Clutch Gear
Forward Clutch Drive Gear
10
11
12
13
14
15 ●
16 ✎
18 ●
Optics Drive Gear
Drum Gear
Main Motor Gear
Drum Drive Gear
Cleaning Brush Gear
Transport Belt Drive Gear
Rear Hot Roller Gear
Upper Exit Roller Gear
Timing Belt

1 Nov. '87
ELECTRICAL COMPONENT LAYOUT
■●

1 Nov. '87
1 9
2●
3●
4
.
5
●
6
●
7,
8
9.
10
●
11.
12.
13
14
15
16
17
.
18
✎
19
✎
20
.
21
●
Exposure Lamp - L2
Exhaust Blower - M4
Optics Thermoswitch - TS2
Toner Overflow Sensor - S9
Separation Power Pack - PI
Scanner Home Position
Sensor - S8
Transformer - TRI
Main Motor Capacitor - C
Optics Cooling Fan - M2
Quenching Lamp - LI
Cleaning Solenoid - SOL2
AC Drive PCB - PCB3
Drum Thermistor - TH2
Forward Clutch - MCI
Pulse Generator Sensor - S1
Reverse Clutch - MC2
Toner End Sensor - S2
Toner Supply Clutch - MC4
Paper Feed Solenoid - SOLI
Development Set Switch -
SW3
Main PCB - PCBI
22.
23
●
24
.
25 .
26 .
27 ●
28
●
29 ●
30 .
31 ●
32●
33 .
34
●
35
●
36
.
37 .
38
●
39 .
40
●
41
●
42 .
43
.
44 .
Key Counter - C02 (Option)
Manual Feed Sensor - S3
CTB Power Pack - P2
Paper Lift Clutch - MC5
Paper Lift Sensor - S11
Registration Clutch - MC3
Main Motor - Ml
Paper End Sensor - S5
Original ID Sensor - S12
Registration Sensor - S6
Total Counter - COI
Image Density Sensor - S4
Operation Panel PCB - PCB4
Vacuum Fan - M3
Pre-Transfer Lamp - L3
Fusing Thermistor - TH1
Paper Exit Sensor - S7
Fusing Lamp - L4
Oil End Sensor - S10
Fusing Thermoswitch - TSI
Door Switch - SW2
Lamp Control PCB - PCB2
Main Switch - SWI

1 Nov. '87
ELECTRICAL COMPONENT DESCRIPTIONS
SYMBOL NAME
Motors
Ml Main Motor
M2
Optics Cooling Fan
M3 Vacuum Fan
M4
Exhaust Blower
Magnetic Clutches
MCI
MC2
MC3
MC4
MC5
Solenoids
SOL1
SOL2
Switches
Swl
SW2
SW3
Sensors
S1
S2
S3
S4
S5
Forward Clutch
Reverse Clutch
Registration Clutch
Toner Supply Clutch
Paper Lift Clutch
*
Paper Feed Solenoid
Cleaning Solenoid
Main Switch
Door Switch
Development Set
Switch
Pulse Generator
Sensor
Toner End Sensor
Manual Feed Sensor
Image Density Sensor
Paper End Sensor
FUNCTION LOCATION
Drives all main unit components’
except fans and blower.
Keeps the optics cavity cool.
Provides suction so that paper is held
firmly on the transport belts.
Removes heat from around the fusing
unit.
Drives the scanner forward.
Returns the scanner to the home
position.
Drives the registration rollers.
Supplies toner to the development
unit.
Lifts the cassette bottom plate.
Feeds paper from the cassette.
Moves the cleaning blade against the
drum.
Supplies power to the copier.
Cuts power to ac components when
the door is open.
Senses whether or not the
development unit is properly set.
Supplies timing pulses to the main
PCB.
Detects when it is time to add toner.
Detects when the manual feed table
is open.
Senses the copy image density.
Informs the CPU when the cassette
runs out of paper.
28
9
35
2
14
16
27
18
25
19
11
44
42
20
15
17
23
33
29

1 Nov. '87
S6
Registration Sensor
S7
Paper Exit Sensor
s8
Scanner Home
Position Sensor
S9
Toner Overflow Sensor
Slo Oil End Sensor
Sll Paper Lift Sensor
S12 Original ID Sensor
Printed Circuit Boards
PCB1 Main PCB
PCB2
Lamp Control PCB
PCB3 AC Drive PCB
PCB4
Operation Panel PCB
Lamps
L1
Quenching Lamp
L2
Exposure Lamp
L3 Pre-Transfer Lamp
L4 Fusing Lamp
Power Packs
P1
Separation Power
Pack
P2 CTB Power Pack
Counters
Col
Total Counter
C02
Key Counter
Misfeed detector; also sets operation
timing.
Misfeed detector.
Informs the CPU when the scanner is
at the home position.
Detects when the used toner tank is
full .
Detects when the oil level is low.
Determines when the paper has
reached the correct feed position.
Senses the background density of the
original document.
Controls all copier functions both
directly and through other PCBS.
Maintains stable lamp output.
Drives the main motor, optics cooling
fan, and the neon lamps.
The operator controls the machine
through this
board.
Neutralizes any charge remaining on
the drum surface after cleaning.
Exposes the original with high
intensity light.
Reduces charge on the drum surface
before transfer.
Heats the fusing unit.
Provides ac voltage for the separation
corona.
Provides high voltage power for the
charge corona, transfer corona, and
the development roller bias.
Keeps track of the total number of
copies made.
Prevents the use of the copier until
installed. Keeps a separate count of
copies for administrative purposes.
(Option)
1-13
31
38
6
4
40
26
30
21
43
12
34
10
1
36
39
5
24
32
22

1 Nov. '87
Thermistors
TH1 Fusing Thermistor
TH2 Drum Thermistor
Others
c
Main Motor Capacitor
TRI Transformer
TS1 Fusing Thermoswitch
TS2
Optics Thermoswitch
Keeps track of the hot roller
37
temperature.
Keeps track of the drum temperature.
13
●
Start capacitor. 8
Steps down the wall voltage to 24
7
Vac and 10 Vat.
Cuts power for the fusing lamp at
220°c.
41
Cuts power for the exposure lamp at
3
130°c.

1 Nov. '87
AC AND DC POWER DISTRIBUTION
>
\
and
,.
-
Direct ac power drives all ac components in the copier.
illustration.
Power from the wall
outlet goes directly to the ac drive PCB and the lamp control PCB. The ac
drive PCB sends ac power to the main motor, the optics cooling fan, the
quenching lamp, and the pre-transfer lamp (PTL). The lamp control PCB
powers the fusing lamp and the exposure lamp.
The transformer receives wall voltage ac input from the ac drive PCB and out-
puts 24 volts ac and 10 volts ac to the main PCB. The main PCB has dc
power circuits that convert the ac input voltages to +24 volts and + 5 volts.
All sensors and the development set switch operate on + 5 volts. All other
dc components operate on +24 volts.