Sharp AR 168S - Digital Imager B/W Laser User manual

CONTENTS
Parts marked with “ ” are important for maintaining the safety of the machine. Be sure to replace these parts
with the replacement parts specified to maintain the safety and performance of the machine.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SERVICE MANUAL
CODE : 00ZAR168D/A1E
DIGITAL MULTIFUNCTIONAL
SYSTEM
AR-168S
MODEL AR-168D
(AR-168D)
[ 1 ] GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
[ 2 ] SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
[ 3 ] CONSUMABLE PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
[ 4 ] EXTERNAL VIEWS AND INTERNAL STRUCTURES . . . . . . . . . 4 - 1
[ 5 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
[ 6 ] COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
[ 7 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
[ 8 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
[ 9 ] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1
[10] TEST COMMAND, TROUBLE CODES. . . . . . . . . . . . . . . . . . . . 10 - 1
[11] MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1
[12] USER PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 1
[13] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - 1
[14] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 - 1
[15] FIRMWARE DOWNLOAD PROCEDURES. . . . . . . . . . . . . . . . . 15 - 1

CAUTION
This laser radiation is not a danger to the skin, but when an exact focusing of the laser beam is achieved
on the eye’s retina, there is the danger of spot damage to the retina.
The following cautions must be observed to avoid exposure of the laser beam to your eyes at the time of
servicing.
1) When a problem in the laser optical unit has occurred, the whole optical unit must be exchanged as a
unit, not as individual parts.
2) Do not look into the machine with the main switch turned on after removing the developer unit, toner
cartridge, and drum cartridge.
3) Do not look into the laser beam exposure slit of the laser optical unit with the connector connected
when removing and installing the optical system.
4) The middle frame contains the safety interlock switch.
Do not defeat the safety interlock by inserting wedges or other items into the switch slot.
LASER WAVE – LENGTH : 770 –795nm
Pulse times : 10.24µsec
Out put power : 0.15mW ± 0.01mW
CAUTION
INVISIBLE LASER RADIATION,
WHEN OPEN AND INTERLOCKS DEFEATED.
AVOID EXPOSURE TO BEAM.
VORSICHT
UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GEÖFFNET UND
SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT.
NICHT DEM STRAHL AUSSETZEN.
VARO !
AVATTAESSA JA SUOJALUKITUS
OHITETTAESSA OLET ALTTIINA
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE ÄLÄ
KATSO SÄTEESEEN.
ADVARSEL
USYNLIG LASERSTRÅLNING VED ÅBNING, NÅR
SIKKERHEDSBRYDERE ER UDE AF
FUNKTION. UNDGÅ UDSAETTELSE FOR
STRÅLNING.
VARNING !
OSYNLIG LASERSTRÅLNING NÄR DENNA DEL
ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD.
BETRAKTA EJ STRÅLEN. – STRÅLEN ÄR
FARLIG.
This product is a class 1 laser product that complies with 21CFR 1040 of the CDRH standard and
IEC825. This means that this machine does not produce hazardous laser radiation. The use of controls,
adjustments or performance of procedures other than those specified herein may result in hazardous
radiation exposure.

At the production line, the output power
of the scanner unit is adjusted to 0.57
MILLI-WATT PLUS 20 PCTS and is
maintained constant by the operation of
the Automatic Power Control (APC).
Even if the APC circuit fails in operation
for some reason, the maximum output
power will only be 15 MILLI-WATT 0.1
MICRO-SEC. Giving and accessible
emission level of 42 MICRO-WATT
which is still-less than the limit of
CLASS-1 laser product.
The foregoing is applicable only to the 220V
model, 230V model and 240V model.
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA
KUIN TÄSSÄKÄYTTÖOHJEESSA MAINITULLA
TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN
TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅANNAT
SÄTT ÄN I DENNA BRUKSANVISNING
SPECIFICERATS, KAN ANVÄNDAREN UTSÄTTAS
FÖR OSYNLIG LASERSTRÅLNING, SOM
ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.
Caution
This product contains a low power laser
device. To ensure continued safety do not
remove any cover or attempt to gain access
to the inside of the product. Refer all
servicing to qualified personnel.
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT

CONTENTS
[1] GENERAL
1. Major functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. Note for servicing and handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[2] SPECIFICATIONS
1. Basic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2. Operation specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
3. Copy performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
4. SPLC printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
5. Scan function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
6. SPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
7. RSPF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
[3] CONSUMABLE PARTS
1. Supply list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
2. Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3. Production control number (lot No.) identification . . . . . . . . . . . . . . . . 3-1
4. TD cartridge replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES
1. Appearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2. Internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
3. Operation panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4. Motors and solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
5. Sensors and switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
6. PWB unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
7. Cross sectional view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
[5] UNPACKING AND INSTALLATION
1. Copier installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
2. Cautions on handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
3. Checking packed components and accessories . . . . . . . . . . . . . . . . . 5-1
4. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5. Removing protective packing materials . . . . . . . . . . . . . . . . . . . . . . . 5-2
6. Developer unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
7. Toner cartridge installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
8. Loading the paper tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
9. Power to copier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
10. Software for AR-168S/168D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
A. Before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
B. Installing the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
C. Setting up button manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
D. Connecting the machine to your computer . . . . . . . . . . . . . . . . . 5-11
11. Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
A. USB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
B. Parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
12. Moving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
[6] COPY PROCESS
1. Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
2. Outline of print process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
3. Actual print process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
[7] OPERATIONAL DESCRIPTIONS
1. Outline of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
2. Scanner section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
A. Scanner unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
B. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
C. Drive system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
3. Laser unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
A. Basic structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
B. Laser beam path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
C. Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
4. Fuser section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
A. General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
5. Paper feed section and paper transport section . . . . . . . . . . . . . . . . . 7-4
A. Paper transport path and general operations . . . . . . . . . . . . . . . . 7-4
6. SPF/RSPF section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
A. Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
B. Document transport path and basic composition . . . . . . . . . . . . . 7-7
C. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
D. Cases where a document jam is caused . . . . . . . . . . . . . . . . . . . 7-7
E. RSPF (SPF) open/close detection (book document detection) . . 7-7
7. D-D (Duplex to Duplex) mode paper/document transport
(Duplex model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
A. Initial state. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
B. Front copy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
C. Back copy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
8. Shifter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
[8] DISASSEMBLY AND ASSEMBLY
1. High voltage section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
B. Drum replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
C. Disassembly procedure (Transfer charger unit) . . . . . . . . . . . . . . 8-3
D. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
E. Charger wire cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
F. Charger wire replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
2. Operation panel section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
3. Optical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
4. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
5. Tray paper feed/transport section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14
6. Manual paper feed section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
D. Pressure plate holder attachment . . . . . . . . . . . . . . . . . . . . . . . . 8-16
7. Rear frame section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17
8. Power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
9. SPF section (SPF model only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
A. Sensor PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
B. Pickup solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
C. Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
D. Manual paper feed roller, pickup roller . . . . . . . . . . . . . . . . . . . . 8-20
E. Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
F. SPF motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
G. Paper entry sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
H. PS roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
I. Paper exit roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
10. Duplex motor section (RSPF model only) . . . . . . . . . . . . . . . . . . . . . 8-22
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
11. Reverse roller section (RSPF model only) . . . . . . . . . . . . . . . . . . . . 8-22
A. List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
B. Disassembly procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
C. Assembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
12. RSPF section (RSPF model only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
A. RSPF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
B. Intermediate tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
C. Upper cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
D. Pickup unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
E. Upper cover of the pickup unit. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
F. Sensor PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
G. Pickup solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
H. Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
I. Manual paper feed roller, pickup roller . . . . . . . . . . . . . . . . . . . . 8-25
J. Transport unit removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
K. Belt 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
L. Belt 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
M. SPF motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
N. Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
O. Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
P. Paper supply roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
Q. Paper entry sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-27
R. Transport roller 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-27
S. Paper exit roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28
T. Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29

[9] ADJUSTMENTS
1. Optical section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
A. Copy magnification ratio adjustment. . . . . . . . . . . . . . . . . . . . . . . 9-1
B. Image position adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
2. Copy density adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
A. Copy density adjustment timing . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
B. Note for copy density adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
C. Necessary tool for copy density adjustment . . . . . . . . . . . . . . . . . 9-4
D. Features of copy density adjustment . . . . . . . . . . . . . . . . . . . . . . 9-4
E. Copy density adjustment procedure . . . . . . . . . . . . . . . . . . . . . . . 9-4
3. High voltage adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
A. Main charger (Grid bias) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
B. DV bias check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
4. Duplex adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
A. Adjusting the paper reverse position in memory for
duplex copying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
B. Adjusting trailing edge void in duplex copy mode . . . . . . . . . . . . . 9-6
5. SPF (RSPF) scan position automatic adjustment. . . . . . . . . . . . . . . . 9-7
6. RSPF (SPF) mode sub scanning direction magnification
ratio adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
7. Automatic black level correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
[10] TEST COMMAND, TROUBLE CODES
1. Entering the test command mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
2. Key rule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
3. List of test commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
4. Descriptions of various test commands . . . . . . . . . . . . . . . . . . . . . . 10-3
5. Trouble codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-39
A. Trouble codes list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-39
B. Details of trouble codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-39
[11] MAINTENANCE
1. Maintenance table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
2. Maintenance display system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
3. Remaining toner indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
[12] USER PROGRAM
1. User programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
A. Copy mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
B. Print mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2
2. Selecting a setting for a user program . . . . . . . . . . . . . . . . . . . . . . . 12-3
[13] ELECTRICAL SECTION
1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
A. Overall block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
2. Circuit descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
A. Main PWB (MCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
B. DC power circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-11
[14] CIRCUIT DIAGRAM
1. MCU PWB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
2. OPERATION PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-26
3. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-27
4. ACTUAL WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-31
[15] FIRMWARE DOWNLOAD PROCEDURES
1. Initial setting (Serial number setting procedures) . . . . . . . . . . . . . . . 15-1
2. Download procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
3. Version acquisition procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
4. EEPROM data acquisition procedure . . . . . . . . . . . . . . . . . . . . . . . . 15-4
5. Installing procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5

AR-168S/168D GENERAL 1 - 1
[1] GENERAL
1. Major functions
Configurations
Descriptions of items
CPM: Copy speed (Copies Per Minute)
SB/MB: SB = Manual feed single bypass, MB = Manual feed multibypass
2 tray: Second cassette unit
SPF: Original feed unit
R-SPF: Duplex original feed unit
Color scanner: Color scanner function
GDI printer: GDI printer function
SPLC:SPLC printer function
E-SORT:Electrical sort
Duplex: Auto duplex copy function
Shifter: Job separator function
FAX: FAX function
Sharpdesk: Scanner utilities
IEEE1284: Interface port (parallel)
USB: Interface port (USB)
AR-NB2 External NIC
Descriptions of table
❍: Standard provision
✕: No function or no option available
Opt: Option
2. Note for servicing and handling
When the main unit power is repeatedly turned OFF/ON rapidly (for about 1sec), the IC (OA982) on the MCU PWB may malfunction to cause an error
(E1-00 Communication error), which does not boot the machine. In case of this error, the blank display is kept for several tens seconds and then "E1-
00" is displayed on the panel display.
<Countermeasure>
Turn off the power and keep it for more than 10sec. Then turn on the power.
When the machine is booted.: There is no problem in the MCU PWB.
When the machine is not booted.: The MCU PWB trouble
Item CPM /
PPM SB/
MB
2
Tray SPF R-SPF
Color
Scanner
(push)
GDI
printer SPLC E-SORT Duplex Shifter FAX Sharp
desk
IEEE
1284 USBARNB2
Model LT A4
AR-168S 16 15 MBOpt ❍✕❍❍ ❍❍✕❍Opt❍❍❍
(2.0)
Opt
AR-168D 16 15 MBOpt ✕❍❍❍ ❍❍❍❍Opt❍❍❍
(2.0)
Opt
(AR-168D)
(AR-168S)

AR-168S/168D SPECIFICATIONS 2 - 1
[2] SPECIFICATIONS
1. Basic Specifications
2. Operation specifications
Item
Type Desktop
Copy system Dry, electrostatic
Segment (class) Digital personal copier
Copier dimensions AR-168S 20.4"(W) x 19.8"(D) x 15.0"(H) (518mm(W) x 503mm(D) x 380mm(H))
AR-168D 20.4"(W) x 19.8"(D) x 15.0"(H) (518mm(W) x 503mm(D) x 380mm(H))
Weight (Approximately) AR-168S 42.3lbs.(19.2Kg) TD and drum cartridges included
AR-168D 44.1lbs.(20.0Kg)
Section, item Details
Paperfeed
section
Paper feed system 1 tray (250 sheets) + multi bypass (50 sheets)
AB system Tray paper feed
section
Paper size A4, B5, A5, 16K (Landscape)
Paper weight 56 - 80g/m2(15 - 21 lbs.)
Paper feed capacity 250 sheets
Kinds Standard paper, specified paper, recycled paper
Remark User adjustment of front paper guide available
Multi bypass paper
feed section
Paper size A4, B5, A5, B6, A6 (Post card), 16K (Landscape)
Paper weight 52 - 128g/m2(14 - 34.5 lbs.)
Paper feed capacity 50 sheets
Kinds Standard paper, specified paper, recycled paper, envelope,
OHP, Label (Single copy)
Remark User adjustment of side paper guide available
Inch system Tray paper feed
section
Paper size 8-1/2" x 14", 8-1/2 x 11", 8-1/2" x 5-1/2" (Landscape)
Paper weight 15 - 21 lbs.
Paper feed capacity 250 sheets
Kinds Standard paper, specified paper, recycled paper
Remark User adjustment of front paper guide available
Multi bypass paper
feed section
Paper size 8-1/2" x 14", 8-1/2 x 11", 8-1/2" x 5-1/2", 3-1/2" x 5-1/2"
(Landscape)
Paper weight 14 - 34.5 lbs.
Paper feed capacity 50 sheets
Kinds Standard paper, specified paper, recycled paper, OHP, Label,
Envelop (Single copy)
Remark User adjustment of side paper guide available
Paper exit section Exit way Face down
Capacity of output tray 200 sheets
Originals Original set Center Registration (left edge)
Max. original size A4 (8-1/2" x 14")
Original kinds sheet, book
Original size detection None
Optical
section
Scanning section Scanning system 3 CCDs (RGB) sensor scanning by lighting white lamp
CCD sensor Resolution 600 dpi
Lighting lamp Type CCFL
Voltage 560Vrms
Power consumption 2.8W
Output data R, G, B 1 or 8 bits/pixel / A/D 16bit
Writing section Writing system Writing to OPC drum by the semiconductor laser
Laser unit Resolution 600 dpi
Image forming Photoconductor type OPC (30ø)
Life 18k
Charger Charging system Saw -tooth charging with a grid, / (-) scorotron discharge
Transfer system (+) DC scorotron system
Separation system (-) DC scorotron system
Developing Developing system Dry, 2-component magnetic brush development system
Cleaning Cleaning system Counter blade system (Counter to rotation)

AR-168S/168D SPECIFICATIONS 2 - 2
*1) May fluctuate due to environmental conditions and the input voltage.
3. Copy performance
Fusing section Fusing system Heat roller system
Upper heat roller type Teflon roller
Lower heat roller type Silicon rubber roller
Heater lamp type Halogen lamp
Voltage 120V
Power consumption 800W
Electrical section Power source Voltage 120V
Frequency 60Hz
Rated current 8A
Power consumption Max. Less than 1000W
Average (during copying) 350 Wh/H *1)
Average (stand-by) 86Wh/H *1)
Pre-heat mode 25Wh/H *1)
Auto power shut-off mode 8.8Wh/H *1)
Section, item Details
Copy magnification Fixed magnification
ratios
4 Reduction + 3 Enlargement
(AB system : 25, 50, 70, 86, 100, 141, 200, 400%)
(Inch system : 25, 50, 64, 78, 100, 129, 200, 400%)
Zooming
magnification ratios
OC: 25 - 400%, SPF/RSPF: 50 - 200%
(376 steps in 1% increments)
Manual steps (text, photo) 5 steps
Copy speed First copy time Tray paper feed 9.6 sec. (Pre-heat mode: 25 sec. / Auto power-shut-off mode: 40 sec.)
A4 or Letter/100%/Auto Exposure
AB system
A4
(Landscape)
Copy speed (CPM) Same size 15
Enlargement 15
Reduction 15
AB system
B5
(Landscape)
Copy speed (CPM) Same size 15
Enlargement 15
Reduction 15
Inch system
8-1/2" x 14"
(Landscape)
Copy speed (CPM) Same size 12
Enlargement 12
Reduction 12
Inch system
8-1/2" x 11"
(Landscape)
Copy speed (CPM) Same size 16
Enlargement 16
Reduction 16
Max. continuous copy quantity 99
Void Void area leading edge 1 - 4mm
Trailing edge 4mm or less, 6mm or less (Duplex copying/both image)
Side void area 0.5mm or more (per side)
4.5mm or less (total of both sides)
Image loss leading edge Same size: 3.0mm or less (OC) / 4.0mm or less (SPF/R-SPF/Duplex)
Enlarge: 1.5mm or less (OC) / 3.0mm or less (SPF/R-SPF/Duplex)
Reduction (50%): 6.0mm or less (OC) / 8.0mm or less (SPF/R-SPF/Duplex)
Warm-up time 0 sec.
Power save mode reset time 0 sec.
Paper jam recovery time 0 sec.
Section, item Details

AR-168S/168D SPECIFICATIONS 2 - 3
4. SPLC printer
*1: Engine Resolution
*2: Running change
5. Scan function
*1: Running change
6. SPF
Print speed Max. 15ppm (A4 / with ROPM) / 16ppm (Letter / with ROPM)
First print time 9.6 sec. (without data transfer time)
Duplex Yes
ROPM Yes
CPU None
Memory Share the memory with E-SORT function
Interface RJ45 (10 base) / USB 2.0
Network Internal NIC
Emulation SPLC (JBIG GDI)
MIB support No
Resolution 600dpi *1
Supported OS Win 95 / 98 / Me / NT 4.0 / 2000 / XP
WHQL support Yes *2
Application Status window
Type Flat Bed Color Scanner
Scanning system Document glass / SPF (AR-168S) / RSPF (AR-168D)
Light source 3 CCDs (RGB) sensor scanning by lighting white lamp (2 pcs of CCFL)
Resolution Optical: 600 x 1200dpi
Setting range: 50 - 9600dpi (Preview resolution is fixed at 75dpi)
Originals Sheet type / Book type
Output data R, G, B 1 or 8 bits/pixel / A/D 16bit
Scan range OC / RSPF: 8.5" (297mm) (L) x 14" (431mm) (W)
Original position: Platen: Left center / SPF: Right center
Scan speed OC / SPF: Max. 2.88ms/line (Color/Gray scale), Max. 0.96 ms/line (B & W)
Protocol TWAIN / WIA (Only XP) / STI
Support file format RAW / JPEG
Interface USB2.0
Scanner utility Button Manager / Sharpdesk
Scan key/lamp Yes
Duplex scan No
Supported OS Win 98 / Me / 2000 / XP
Void area No (User settable by PC)
WHQL supported Yes *1
Original capacity 30 sheets (52 to 90g/m2) (14 to 23.9 lbs.)
Original size A4 to A5 / 8-1/2" x 14" to 5-1/2" x 8-1/2"
Original replacement speed 12CPM (A4/8-1/2" x 11"Landscape) (15CPM model)
Original placement Face up
Original weight 52 to 90g/m2(14 - 23.9lbs.)
Mixed feeding(Paper size) Performance Degraded
Original which cannot Thermal papers, originals with punch holes for files, be used folded paper, transparent originals such as OHP films,
stapled or clip used originals with cover up liquid used, Originals with tape sealed, originals with high level frictional
coefficient such as photos or catalogs.

AR-168S/168D SPECIFICATIONS 2 - 4
7. RSPF
Original capacity 30 sheets (52 to 90g/m2) (14 to 23.9 lbs.)
Original size A4 to A5 / 8-1/2" x 14" to 5-1/2" x 8-1/2"
Original replacement speed 12CPM (A4/8-1/2" x 11"Landscape)
Job speed (Tray1,Landscape) Single copy S to S 12CPM
S to D 5.6CPM
D to S 5.5CPM
D to D 5.2CPM
Multi copy S to S 16CPM
D to S 16CPM
Original placement Face up
Original weight 52 to 90g/m2(14 - 23.9lbs.)
Mixed feeding No
Original which cannot Thermal papers, originals with punch holes for files, be used folded paper, transparent originals
such as OHP films, stapled or clip used originals with cover up liquid used, Originals with tape
sealed, originals with high level frictional coefficient such as photos or catalogs.

AR-168S/168D CONSUMABLE PARTS 3 - 1
[3] CONSUMABLE PARTS
1. Supply list
A. SEC/SECL/LAG
Note: Printing of the master/individual cartons is made in 2 languages, English/French.
Packed together with the machine: DR 25K/Developer UN/Process UN
2. Environmental
The environmental conditions for assuring the copy quality and the
machine operations are as follows:
(1) Normal operating condition
Temperature: 20°C to 25
Humidity: 65 ±5%RH
(2) Acceptable operating condition
(3) Transportation condition
(4) Supply storage condition
3. Production control number (lot No.)
identification
<Toner cartridge>
∗: Destination code
No. Item Content Life Product name Package Remark
1 Toner CA (Black)
(with IC chip)
Toner
(Toner: Net Weight 243g)
×10 80K AR-152MT 1 ∗Life setup is based on A4
6%.
MT=NT ∗10
Polyethylene bag ×10
2 Developer Developer
(Developer: Net Weight 170g)
×10 250K AR-152MD 1 MD=ND ∗10
3 Drum kit Drum ×1 25K AR-152DR 10
Drum fixing plate ×1
Humidity (RH)
85%
60%
20%
10˚C 30˚C 35˚C
Humidity (RH)
90%
60%
15%
–25˚C30˚C40˚C
Classification No.
EX Destination A packed with machine G
B packed with machine H
Option Destination AP
BQ
Humidity (RH)
90%
20%
–5˚C45˚C
Production month
Production day
Destination code ∗
(Dealer, distributor, OEM, etc.)
Production place
(SOCC: Fixed to B.)
End digit of year
Version No.

AR-168S/168D CONSUMABLE PARTS 3 - 2
<Drum cartridge>
The label on the drum cartridge shows the date of production.
(SOCC production)
(JAPAN production)
∗1 The production control label is not attached to the cartridge of a
China product.
<Developer>
4. TD cartridge replacement
1) Open the front and side cabinets of the copier.
2) Keep holding Toner lover, and
3) Carefully pull out Toner unit from the copier.
4) Put Toner unit in a collection bag immediately after removing it
from the copier
Note: Never carry exposed Toner unit. Be sure to put it in the
collection bag.
Division No.
Option 2
Packed with machine 3
Production month
Production day
Destination code
(Dealer, distributor, OEM, etc.)
Production place
(SOCC: Fixed to B.)
End digit of year
Version No.
X000119Ver.A 1
Production month
(1 - 9 = Jan. - Sep. 0 = Oct. X = Nov. Y = Dec.)
Serial number of month
Fixed to 1.
Pack division
(See table below)
End digit of year
Version No.
Production control
label attachment position
Production control
label attachment position(*1)
Sub lot
Production day
Production month
End digit of year
Production place
1
3
2

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 1
[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES
1. Appearance
2. Internal
1 Document glass 2 Operation panel 3 Front cover
4 Paper tray 5 Side cover 6 Side cover open button
7 Bypass tray paper guides 8 Bypass tray 9 Reversing tray (RSPF only)
10 Original guides 11 Document feeder cover 12 Document feeder tray
13 Exit area 14 Paper output tray 15 Paper output tray extension
16 Power switch 17 Handles 18 Power cord
19 USB connector 20 Parallel connector 21 Paper holder arm
1 Front cover 2 Side cover 3 Fusing unit release lever
4 Transfer charger 5 Charger cleaner 6 Photoconductive drum
14
15
16
17
18
17
Interface
21
SPF/RSPF
2
3
4
1
5
7
6
8
9
20
19
11
12
13
10
3
4
5
2
1
Toner cartridge
6

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 2
3. Operation panel
1[MODE SELECT] key / Mode indicators
Press this key to select the mode. The indicator of the selected mode
lights (copy, printer, scanner, fax mode indicators).
2Display
This shows messages indicating the machine status and any
problems that occur, as well as user programs and function setting
menus.
3Numeric keys
Use these to enter the number of copies and other numerical
settings.
The keys can also be used to select items in function setting menus.
4[CLEAR] key ( )
Use this to clear the set number of copies, as well as cancel a job
that is in progress. When a setting menu appears, use this key to
move back to the previous menu level.
5Power save indicator
This lights up when the power save function is activated.
6SPF/RSPF indicator
This lights up when an original is placed in the SPF/RSPF.
7Error indicator
This lights steadily or blinks when a paper misfeed or other error
occurs.
8[TRAY SELECT] key ( )
Use to select the paper tray that has the desired paper for copying.
9Tray location indicator
Indicates the selected paper tray. The indicator blinks when the tray
is out of paper or is not closed.
10 [MENU] key
Press this key to select the paper size for copying, to configure a
user program or to display the total count.
11 [2-SIDED COPY] key (AR-168D only)
Press to select the automatic two-sided copying mode.
12 [E-SORT/SP.FUN] key
Press to select the sort function, 2 IN 1 copy function, or margin shift
function.
13 [ ] key ( ), [ ] key ( ), [ENTER] key
Press the [ ] key ( ) or [ ] key ( ) to select an item in a
function setting menu.
Press the [ENTER] key to enter a selection.
14 [EXPOSURE] key
Use to switch from auto exposure adjustment to text mode or photo
mode.
15 [COPY RATIO] key
Press to select an enlargement or reduction ratio.
To select a preset ratio setting, press the [COPY RATIO] key and
select the desired preset ratio. To select a ratio that is not preset,
press the [COPY RATIO] key, select the preset ratio that is closest to
the desired ratio, and then press the [ ] key ( ) or [ ] key ( )
to increase or decrease the ratio in increments of 1%.
16 [START] key ( ) / Ready indicator
The ready indicator lights up when copying or scanning is possible.
To begin copying, press the [START] key ( ).
The [START] key ( ) is also pressed to return to normal operation
from auto power shut-off mode.
17 [CLEAR ALL] key ( )
This returns all functions to the default settings. When pressed in a
setting menu, this returns the settings and display to the initial state.
18 Shows the current copy ratio.
19 Shows the selected paper size. 20 Shows the number of copies that has been entered with the numeric
keys.
21 A checkmark " " appears when the exposure has been changed, or
when two-sided copying, sort, 2 IN 1, or margin shift is selected.
READY TO COPY.
100% 8.5x11 0
Display
AR-168D
6 7 8 9 10 11 12 1314 15 16 17
18 19 20 21
12345

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 3
4. Motors and solenoids
No. Part name Control signal Function / Operation
1 Main motor MM Drives the copier.
2 Scanner motor MRMT Drives the optical mirror base (scanner unit).
3 Toner motor TM Supplies toner.
4 Cooling fan motor VFM Ventilate the fuser section.
5 Resist roller solenoid RRS Resist roller rotation control solenoid
6 Paper feed solenoid CPFS1 Cassette Paper feed solenoid 1
7 Multi paper feed solenoid MPFS Multi manual pages feed solenoid
8 SPF motor SPFM Drives the single pass feeder
9 Duplex motor DMT Devices the duplex paper transport section (Duplex model only)
10 Original feed solenoid SPUS Original pick up solenoid
11 SPF paper feed solenoid SPFS Original feed solenoid (RSPF only)
12 SPF gate solenoid SGS Controls the document reverse gate. (RSPF only)
13 Shifter motor SFTM Drives the shifter.
1
4
8
11
2
12
13
9
10
5
7
6
3

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 4
5. Sensors and switches
No. Name Signal Type Function Output
1 Scanner unit home position
sensor
MHPS Transmission sensor Scanner unit home position detection "H" at home position
2 POD sensor POD Transmission sensor Paper exit detection "H" at paper pass
3 PPD2 sensor PPD2 Transmission sensor Paper transport detection 2 "L" at paper pass
4 Cassette detection switch CED1 Micro-switch Cassette installation detection "H" at cassette insertion
5 PPD1 sensor PPD1 Transmission sensor Paper transport detection 1 "L" at paper pass
6 Door switch DSW Micro-switch Door open/close detection
(safety switch for 24V)
1 or 0V of 24V at door open
7 SPF sensor SPID/
SD SW
Transmission sensor Paper entry detection
Cover open/close detection
"L" at paper pass
8 SPPD sensor SPPD Transmission sensor Paper transport detection "L" at paper pass
9 PD1 sensor PD1 Micro-switch Paper width detect "H" at A4 size or less
"L" at A4 size or more
1
8
7
2
3
4
5
9
6

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 5
6. PWB unit
No. Name Function
1 Exposure lamp inverter PWB Exposure lamp (CCFL) control
2 Main PWB (MCU) Copier control
3 Operation PWB Operation input/display
4 Power PWB AC power input, DC voltage control, High voltage control
5 CCD sensor PWB For image scanning
6 LSU motor PWB For polygon motor drive (In the LSU)
7 TCS PWB For toner sensor control
8 LSU PWB For laser control (In the LSU)
9 FAX-operation PWB FAX operation input (AR-FX9 option)
10 Modem PWB FAX control (AR-FX9 option)
1
52
8
6
7
3
4
9
10

AR-168S/168D EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 6
7. Cross sectional view
No. Part name Function and operation
1 Scanner unit Illuminates the original with the copy lamp and passes the reflected light to the lens unit(CCD).
2 Exposure lamp Exposure lamp (CCFL) Illuminates original
3 LSU (Laser unit) Converts the original image signal into laser beams and writes onto the drum.
4 Paper exit roller Roller for paper exit
5 Main charger Provides negative charges evenly to the drum surface.
6 Heat roller Fuses toner on the paper. (Teflon roller)
7 Pressure roller Fuses toner on the paper. (Silicon rubber roller)
8 Drum Forms images.
9 Transfer unit Transfers images onto the drum.
10 Pickup roller Picks up the manual feed paper. (In multi feed only)
11 Manual paper feed tray Tray for manual feed paper
12 Manual paper feed roller Transport the paper from the manual paper feed port.
13 PS roller unit Takes synchronization between the lead edge and the rear edge of the paper.
14 Paper feed roller Picks up a sheet of paper from the cassette.
15 Pickup roller Picks up documents.
16 Separation roller Separates documents to feed properly.
17 PS roller Feeds documents to the scanning section.
18 Paper exit roller Discharges documents.
1 4
3 5 18 15
6
7
8
9
10
111214 13
16 17
2

AR-168S/168D UNPACKING AND INSTALLATION 5 - 1
[5] UNPACKING AND INSTALLATION
1. Copier installation
Improper installation may damage the copier. Please note the following
during initial installation and whenever the copier is moved.
Caution: If the copier is moved from a cool place to a warm place, con-
densation may form inside the copier. Operation in this condi-
tion will cause poor copy quality and malfunctions.
Leave the copier at room temperature for at least 2 hours
before use.
Do not install your copier in areas that are:
•damp, humid, or very dusty
•exposed to direct sunlight
•poorly ventilated
•subject to extreme temperature or humidity changes, e.g., near an
air conditioner or heater.
The copier should be installed near an accessible power outlet for easy
connection.
Be sure to connect the power cord only to a power outlet that meets
the specified voltage and current requirements.
Also make certain the outlet is properly grounded.
Be sure to allow the required space around the machine for servicing
and proper ventilation.
2. Cautions on handling
Be careful in handling the copier as follows to maintain the perfor-
mance of this copier.
Do not drop the copier, subject it to shock or strike it against any
object.
Do not expose the drum cartridge to direct sunlight.
Doing so will damage the surface (green portion) of the drum cartridge,
causing poor print quality.
Store spare supplies such as drum cartridges and TD cartridges in a
dark place without removing from the package before use.
If they are exposed to direct sunlight, poor print quality may result.
Do not touch the surface (green portion) of the drum cartridge.
Doing so will damage the surface of the cartridge, causing poor print
quality.
3. Checking packed components and
accessories
Open the carton and check if the following components and accesso-
ries are included.
8"(20cm)
8" (20cm)
4"
(10cm)
4"
(10cm)
Drum cartridge
(installed in machine)
Software CD-ROM
•Operation manual

AR-168S/168D UNPACKING AND INSTALLATION 5 - 2
4. Unpacking
Be sure to hold the handles on both sides of the machine to unpack the
machine and carry it to the installation location.
5. Removing protective packing materials
1) Remove all pieces of tape shown in the illustration below and then
open the SPF/RSPF and remove the protective materials. Take out
the bag containing the toner cartridge.
2) Release the scan head locking switch.
3) Open the bypass tray, and then open the side cover while pressing
the side cover open button.
4) Remove the CAUTION tape from the front cover and remove the
two protective pins from the fusing machine by pulling the strings
upward one at a time.
6. Developer unit installation
1) 2) 3) Open the side and front cabinets of the copier.
4) Remove the locking tape of the developer unit.
5) Remove the screw which is fixing the copier and Developer unit.
6) Remove Developer unit slowly from the copier.
7) Remove the screw (1 pc).
8) Remove Upper developer unit.
Lock Unlock
Grasp here and turn in
the direction of the arrow.
CAUTION tape
Protective pins
1
3
5
2
4