2004 Sharp AR-168S/D Multifunctional Service Manual (P/N 00ZAR168D/A1E)

This January 2004 Sharp factory service manual covers the AR-168S and AR-168D digital multifunction systems at component, diagnostic, adjustment, and circuit level. Sharp states that the publication is for after-sales service, and its use of service-mode commands, high-voltage measurements, and board-level schematics makes it best suited to qualified copier technicians. The file is a 185-page PDF: a 184-page Sharp publication identified by code 00ZAR168D/A1E, preceded by one separate collection notice page that is not part of the Sharp manual.

• Model-specific coverage distinguishes the AR-168S with its standard SPF and no duplex function from the AR-168D with its standard RSPF and automatic duplex copying. The configuration table also identifies the optional second cassette, AR-FX9 fax hardware, and AR-NB2 external network interface.
• Mechanical repair procedures cover the drum and main charger, transfer charger and charger wire, operation panel, scanner optics, fusing unit, tray and bypass feed systems, rear frame, power section, SPF/RSPF assemblies, duplex motor, reverse roller, and document transport components.
• Factory adjustment work addresses main- and sub-scan magnification, image position and center offset, copy density, grid and developer bias checks, duplex reverse position and trailing-edge void, SPF/RSPF scan position, feeder magnification, and automatic black-level correction. Sharp test charts UKOG-0162FCZZ, UKOG-0089CSZZ, and UKOG-0011QSZZ are identified where required.
• Service-mode diagnosis provides functional checks for the mirror drive, document feeder, motors, solenoids, lamps, sensors, charger outputs, fuser, polygon motor, counters, and memory. Trouble-code tables add cause, inspection, and repair guidance for communication, shading, laser, cartridge, fuser, scanner, motor, EEPROM, CRUM, fax-board, and operation-panel faults.
• Electrical documentation includes the overall block diagram; a 14-sheet MCU PWB schematic set covering the CPU, ASIC, memory, drivers, IMC2/USB 2.0, and interfaces; three operation-panel PWB sheets; the power-supply schematic; and a three-part actual wiring diagram for the MCU, SPF/RSPF, interface, and optional fax sections.
• Firmware service coverage explains serial-number setup, firmware download, version retrieval, EEPROM-data acquisition, and maintenance-driver installation through the USB service program. The required Maintenance.exe package, model files, drivers, and .dwl firmware data are separate service files, not content embedded in this PDF.

Print Engine, Optics, and Paper Handling

The process chapters trace the complete electrophotographic cycle through scorotron charging, laser exposure, two-component magnetic-brush development, transfer, separation, heat-roll fusing, cleaning, and optical discharge. Operational drawings identify the scanner carriage and drive, optical path, laser beam path, fuser thermal-control system, and the cassette and manual-feed paper routes. Separate descriptions follow SPF/RSPF document movement, jam-detection conditions, AR-168D duplex-to-duplex transport, switchback operation, and the output shifter.

The illustrated disassembly section goes beyond parts identification. It shows removal and reassembly relationships for the optical carriage, heater lamp, heat and pressure rollers, paper-feed clutches and solenoids, transport rollers, scanner feeder, and duplex drive. Motor, solenoid, sensor, switch, and PWB location drawings support fault isolation before parts are removed.

Repair References and Important Limits

Shop data covers AR-152MT toner, AR-152MD developer, the AR-152DR drum kit, production-lot markings, maintenance counters, user-program settings, connector signals, circuit operation, JFE552 grease (UKOG-0235FCZZ), adjustment tools, test-command behavior, and lead-free solder identification. The software chapters are period-specific, covering USB 2.0, IEEE 1284, and Windows 95, 98, Me, NT 4.0, 2000, and XP. The machine specifications are for 120 V/60 Hz, while the power-supply sheet is labeled 120 V/127 V. Although the AR-168D supports automatic two-sided copying, the PC scanner specification does not provide duplex scanning. This is a service manual rather than a full parts catalog; it supplies component names and service drawings, but not a complete orderable-parts breakdown.

Two repair cautions are especially specific. Connecting or disconnecting the MCU-to-LSU harness while power is present can destroy the IC inside the laser unit, while incorrect drum positioning against the sub-blade can break the blade edge. The manual also requires power isolation and a delay for residual voltage before harness work, and it prohibits defeating the laser safety interlock. Laser, high-voltage, hot-fuser, and powered diagnostic work should be performed only with the stated service precautions and appropriate test equipment.