
Do you have a question about the Onkyo FR-155 and is the answer not in the manual?
Details on general, amplifier, CD, MD, and tuner performance parameters.
Safety warnings and general precautions for handling the optical pickup.
Technical specifications including material, wavelength, and output of the laser diode.
Information on affixed laser warning labels and essential service procedures.
Diagram and labels for all controls, buttons, and display elements on the front panel.
Explanation of various indicators shown on the unit's multi-purpose display.
Instructions for connecting cassette decks, CD recorders, MD players, DVD players, and subwoofers.
Diagram and labels for all buttons on the remote controller.
Step-by-step guide to set the unit's clock and day of the week.
Functional overview and pinout for the TC9273N analog switch IC.
Functional overview and pinout for the TA7291S motor driver IC.
Functional overview and pinout for the TC9162AN analog switch IC.
Functional overview of the CXD2589Q CD digital signal processor.
Detailed pin numbers, I/O, and descriptions for the CXD2589Q IC.
Detailed pin numbers, I/O, and descriptions for the CXD2589Q IC.
Functional overview of the CXA1992BR RF signal processing servo amplifier.
Detailed pin numbers, I/O, and descriptions for the CXA1992BR IC.
Detailed pin numbers, I/O, and descriptions for the CXA1992BR IC.
Pinout and function descriptions for the LA6541D 4-channel BTL driver.
Pinout and function descriptions for the BU1923 RDS decoder.
Functional overview of the M66004F FL tube driver IC.
Pinout and function descriptions for the M66004F FL tube driver IC.
Visual examples of display patterns for various modes and indicators.
Table mapping pins to specific display segments and functions.
Diagram illustrating connections between the microprocessor and other system blocks.
Pinout and function descriptions for the MPD780058GC microprocessor.
Pinout and function descriptions for the MPD780058GC microprocessor.
Explanation of how the microprocessor interacts with the energy save function.
Details on how the microprocessor controls CD, Tuner, and MD mute functions.
Control logic for various other operations managed by the microprocessor.
Illustrated breakdown of the MD mechanism's upper assembly.
List of part numbers and descriptions for MD mechanism components.
Illustrated breakdown of the MD mechanism's lower assembly and electronic components.
List of part numbers and descriptions for MD mechanism components.
Illustrated guide for the first eight steps of MD mechanism disassembly.
Illustrated guide for disassembly steps nine through sixteen.
Illustrated guide for the final disassembly steps seventeen through twenty.
Important notes and precautions for reassembling the MD mechanism.
Instructions for entering, operating, and exiting the MD test mode.
List of available test modes and their corresponding display names.
Safety warnings and guidelines for checking laser emission.
Overview of adjustment types, required tools, and test discs.
Procedure for adjusting temperature compensation offset.
Procedure for checking and verifying laser power output.
Procedure for adjusting the EF balance of the optical pickup.
Diagrams showing the layout of components on MD mount boards.
Table explaining various messages displayed by the unit.
Illustrated breakdown of the CD mechanism's components.
Illustrated breakdown of the CD mechanism's components and parts.
List of part numbers and descriptions for CD mechanism components.
Procedure for adjusting the focus gain on the CD player.
Procedure for adjusting and calibrating the system clock frequency.
Step-by-step guide for safely handling and replacing the optical pickup.
List of part numbers and descriptions for chassis components.
List of PCB references, connectors, and fuses for the chassis.
Illustrated breakdown of the main chassis assembly and its components.
Block diagram showing connections for selector, tuner, and acoustic circuits.
Block diagram showing connections for display, microprocessor, and CD circuits.
Block diagram showing connections for power supply and MD mechanism.
Block diagram of the primary and power amplifier circuit boards.
Block diagram of the power supply and microprocessor circuit boards.
Detailed schematic showing the amplifier circuitry and component connections.
Detailed schematic showing the amplifier circuitry and component connections.
Schematic showing connections between the CD mechanism and microprocessor.
Layout diagram for the microprocessor and CD circuit PC board (NADG-6933).
Layout diagram for the speaker terminal PC board (NAETC-6932).
Layout diagram for the CD connector PC board (NAETC-6939).
Schematic diagram for the display circuit.
Schematic diagram for the power supply circuit.
Layout diagram for the display circuit PC board (NADIS-6935).
Layout diagram for the power supply circuit PC board (NAPS-6928).
Layout diagram for the control switch PC board (NASW-6936).
Layout diagram for the headphone jack PC board (NAETC-7034).
List of components for the Power Supply Circuit PC Board (NAPS-6928).
List of components for the Primary Circuit PC Board (NAPS-6929).
List of components for the Power Amplifier Circuit PC Board (NAAF-6930).
List of components for the Microprocessor and CD Circuit PC Board (NADG-6933).
List of components for the Acoustic Circuit PC Board (NAAF-6934).
Lists components for display, CD connector, headphone, control, and selector boards.
Wiring diagram for selector, tuner, acoustic, and power amplifier circuits.
Wiring diagram for display, microprocessor, CD, and MD mechanism circuits.
Wiring diagram for power supply, speaker terminal, and headphone circuits.
Illustrated view of the product's packing configuration.
List of all parts and accessories included in the product packaging.
Contact details for ONKYO CORPORATION sales and planning division.
Contact details for ONKYO U.S.A. CORPORATION.
Contact details for ONKYO EUROPE ELECTRONICS GmbH.
Contact details for ONKYO CHINA LIMITED.
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