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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 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.

6. When the development unit, cleaning unit, drum unit, or the DF is

removed from the machine, the upper unit becomes lighter. If the upper

unit is released under this condition, it tends to open very abruptly. The

service engineer might be injured if he is leaning over the machine at this

time. Also, the machine might move due to the shock of the upper unit

opening abruptly. To avoid possible injury or machine damage, hold the

upper unit firmly when opening the unloaded upper unit.

7. Due to variation in the tolerance of the torsion springs, the upper unit

cannot be held at an angle of 16 degrees by itself when the DF is

installed. To avoid possible injury, always use the upper unit stand to

keep the upper unit open.

HEALTH SAFETY CONDITIONS

1. Never operate the copier without the ozone filter installed.

2. Always replace the ozone filter at 80K copy 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 pack has a lithium battery which can explode if handled

incorrectly. Replace only with same RAM pack. Do not recharge, or

burn this battery. Used RAM pack 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 photoconductors

according to local regulations. (These are non-toxic supplies.)

3. Dispose of replaced parts in accordance with local regulations.

4. When keeping used lithium batteries (main control boards) in order to

dispose of them later, do not store more than 100 batteries (main control

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: Desk top

Copy Process: Dry electrostatic transfer system

Original Type: Sheet/Book

Original Alignment: Left center

Original Size: Maximum: A3/11" x 17" (lengthwise) – A152

copier

B4/10" x 14" (lengthwise) – A151

copier

Copy Paper Size: Maximum: B4/10" x 14" (lengthwise)

Minimum:

Paper Tray: A5/51/2" x 81/2" (lengthwise)

Bypass Feed: A6/51/2" x 81/2" (lengthwise)

Copy Paper Weight: Paper tray feed – 64 to 90 g/m2(17 to 24 lb)

Bypass feed – 52 to 105 g/m2(14 to 28 lb)

Reproduction Ratios: 2 Enlargement and 3 Reduction (A152 copier only)

A4 Version Letter Version

Enlargement 141%

122% 129%

121%

Full size 100% 100%

Reduction 93%

82%

71%

93%

74%

65%

Zoom: From 61% to 141% in 1% steps

(A152 copier only)

Copying Speed: 13 copies/minute (A4/81/2" x 11" lengthwise)

10 copies/minute (B4/81/2" x 14")

Warm-Up Time: 30 seconds (at 20°C/68°F)

First Copy Time: 9 seconds (A4/81/2" x 11" lengthwise)

Copy Number Input: Number keys, 1 to 99

Manual Image Density

Selection: 7 steps

24 June 1994 SPECIFICATIONS

1-1

Automatic Reset: 1 minute standard setting; can also be set to 3

minutes or no automatic reset.

Energy Saver Function: Automatic

Paper Capacity: Paper tray – 250 sheets

Bypass feed table – 1 sheet

Toner Replenishment: Cartridge exchange (320 g/cartridge)

Copy Tray Capacity: 100 sheets (B4/10" x 14" or smaller)

Power Source: 110V/ 60Hz/ 15A (for Taiwan)

115V/ 60Hz/ 15A (for North America)

220V – 240V/ 50Hz/ 8A (for Europe)

220V/ 60Hz/ 8A (for Middle East)

220V/ 50Hz/ 8A (for Asia)

(Refer to the serial number plate (rating plate) to

determine the power source required by the

machine.)

Power Consumption: Copier Only With DF

Maximum 1.4 kVA 1.5 kVA

Warm-up 620 VA (average) 640 VA (average)

Copy cycle 810 VA (average) 860 VA (average)

Ready 160 VA (average) 180 VA (average)

Noise Emission: Copier Only With DF

Maximum 58 db 60 db

Copy cycle Less than 55 db Less than 55 db

Ready Less than 39 db Less than 39 db

Dimensions:

Width Depth Height

Copier with platen cover and

copy tray 713 mm (28.1") 592 mm (23.3") 400 mm (15.7")

Copier with document feeder

and copy tray 713 mm (28.1") 592 mm (23.3") 463 mm (18.2")

SPECIFICATIONS 24 June 1994

1-2

Weight: Copier only: 43 kg (94.8 lb)

With DF: 50 kg (110.2 lb)

Optional Equipment:

(Sales items) Document feeder (A152 copier only)

Key counter

Optional Equipment:

(Service items) Drum anti-condensation heater

Optics anti-condensation heater

Pre-transfer lamp

Optics cooling fan (for A151 copier only)

•Specifications are subject to change without notice.

24 June 1994 SPECIFICATIONS

1-3

2. COPY PROCESSES AROUND THE DRUM

4. DEVELOPMENT

5. IMAGE TRANSFER

6. PAPER

3. ERASE

2. EXPOSURE

1. DRUM CHARGE

8. QUENCHING

7. CLEANING

SEPARATION

COPY PROCESSES AROUND THE DRUM 24 June 1994

1-4

1. DRUM CHARGE

In the dark, the charge corona unit gives a uniform negative charge to the organic

photoconductive (OPC) drum. The charge remains on the surface of the drum because the

OPC drum has a high electrical resistance in the dark.

2. EXPOSURE

An image of the original is reflected to the OPC drum surface via the optics assembly. The

charge on the drum surface is dissipated in direct proportion to the intensity of the reflected

light, thus producing an electrical latent image on the drum surface.

3. ERASE

The erase lamp illuminates the areas of the charged drum surface that will not be used for

the copy image. The resistance of the drum in the illuminated areas drops and the charge on

those areas dissipates.

4. DEVELOPMENT

Positively charged toner is attracted to the negatively charged areas of the drum, thus

developing the latent image. (The positive triboelectric charge is caused by friction between

the carrier and toner particles.)

5. IMAGE TRANSFER

Paper is fed to the drum surface at the proper time so as 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 copy paper, producing an electrical force which pulls the toner particles from the

drum surface to the copy paper. At the same time, the copy paper is electrically attracted to

the drum surface.

6. PAPER SEPARATION

A strong ac corona discharge is applied to the back side of the copy paper, reducing the

negative charge on the copy paper and breaking the electrical attraction between the paper

and the drum. Then, the stiffness of the copy paper causes it to separate from the drum

surface. The pick-off pawl help to separate the paper from the drum.

7. CLEANING

The cleaning blade removes any toner remaining on the drum.

8. QUENCHING

Light from the quenching lamp electrically neutralizes the surface of the drum.

24 June 1994 COPY PROCESSES AROUND THE DRUM

1-5

3. COPY PROCESS CONTROL

Grid Voltage Exposure Lamp

Voltage Development Bias

Voltage Erase Lamp

Image

Density

Control

Standard image

density grid voltage

(–680 V)

Base exposure lamp

voltage (Manual or ADS

mode) (SP48)

Base bias voltage factor

(Manual or ADS mode

[SP34])

Depends on

paper size

and

reproduction

ratio

+ + +

Drum residual voltage

(Vr) correction factor

(SP67)

Lcorrection factor

Reproduction ratio

correction factor (A152

copier only)

Image bias voltage

adjustment factor

(SP37)

Auto image density

level factor (SP34) +

Drum residual voltage

(Vr) correction factor

Note:

Base bias voltage at

manual ID level 7 can be

adjusted by SP50

Toner

Density

Detection

Standard ID sensor

grid voltage

(–460 V)

Same as image density

control Depends on ID sensor

bias setting (SP33) ID sensor

pattern erase

(Vsg

detection:

Full erase)

Drum wear correction

factor (SP57) Note:

For initial 499 copies

bias voltage is increased

by –20 volts

Residual

Voltage

(Vr)

Detection

Standard ID sensor

grid voltage

(–460 V)

Drum wear correction

factor (SP57)

Same as image density

control 0 Volts (Fixed) Full erase

(All LEDs ON)

Between

Copies 0 Volts (Fixed) Exposure lamp turns off –160 Volts (Fixed)

+ Full erase

(All LEDs ON)

Image bias voltage

adjustment factor

(SP37)

Drum residual voltage

(Vr) correction factor

NOTE: The boxed items can be adjusted by SP mode.

COPY PROCESS CONTROL 24 June 1994

1-6

4. MECHANICAL COMPONENT LAYOUT

16 17 18 19 20 21 22 23 24 25 26 27

1. Semicircular Feed Rollers

2. Paper Tray

3. Registration Rollers

4. Transfer and Separation

Corona Unit

5. Pick-off Pawl

6. Cleaning Unit

7. Pressure Roller

8. Fusing Unit

9. Hot Roller

10. Exit Rollers

11. Copy Tray

12. Hot Roller Strippers

13. Exhaust Blower Motor

14. 3rd Mirror

15. 2nd Mirror

16. 1st Mirror

17. Ozone Filter

18. Used Toner Tank

19. Cleaning Blade

20. Quenching Lamp

21. Charge Corona Unit

22. Lens

23. 6th Mirror

24. Erase Lamp

25. Drum

26. 4th Mirror

27. 5th Mirror

28. Optics Cooling Fan Motor

(A152 Copier only)

29. Toner Supply Unit

30. Development Unit

31. 2nd Relay Rollers

32. By-pass Feed Table

33. 1st Relay Rollers

24 June 1994 MECHANICAL COMPONENT LAYOUT

1-7

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