Onkyo TX-SR702

TX-SR702
TX-SR702/E
SERVICE MANUAL
SERVICE MANUAL
Ref. No. 3826
092004
120V AC, 60Hz
230-240V AC, 50Hz
120/220-230V AC, 50/60Hz
220-230V AC, 50Hz
AV RECEIVER
MODEL
TX-SR702/E
Black, Golden and Silver models
BMDD,BMDC,SMDC
BMPP,SMPP,BMPA,GMPA,GMPT
GMWT
GMGK,GMGQ,GMGR
SAFETY-RELATED COMPONENT
WARNING!!
THE MARK FOUND ON SOME COMPONENT
PARTS INDICATES THE CRITICAL FOR RISK OF
FIRE AND ELECTRIC SHOCK.
WHEN REPLACING, BE SURE TO USE PARTS OF
IDENTICAL DESIGNATION.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
RC-588M

Onkyo TX-SR702 Specifications

General

Audio Channels	7.1
THD (Total Harmonic Distortion)	0.08%
Frequency Response	10 Hz - 100 kHz
Input Sensitivity	200 mV
Signal to Noise Ratio	100 dB
Digital Inputs	3 x Optical, 2 x Coaxial
Surround Sound Formats	Dolby Digital, DTS
Weight	35.3 lbs
Output Power per Channel	100W (8 ohms, 20Hz-20kHz, 0.08% THD)

Summary

Safety-Related Component Warnings

Specifications

Amplifier Section

Details amplifier performance metrics like power output, THD, and damping factor.

Video Section

Lists video input/output specifications and frequency response.

Tuner Section

Provides FM and AM tuning frequency range, sensitivity, and response.

General Specifications

Covers power supply, consumption, dimensions, weight, and connectivity.

Service Procedures

Replacing Fuses

Instructions for fuse replacement, including part numbers and ratings.

Initialize Unit

Procedure to reset the unit to factory settings by combining buttons.

Safety Check Procedures

Outlines safety checks like leakage current and voltage selector settings.

Exploded View

Block Diagrams

Amplifier Section

Illustrates the signal flow and components within the amplifier section.

Video Section

Depicts the signal processing for video inputs and outputs.

Schematic Diagrams

Preamplifier Section

Detailed circuit diagram of the preamplifier stage.

DSP Section

Circuit diagram illustrating the Digital Signal Processor components.

Power Amplifier Section

Circuit schematic for the power amplifier stage.

Power Supply Section

Circuit diagram detailing the power supply unit components.

Microprocessor Connection Diagram

Printed Circuit Board Views

View 1 - Component Side

Shows the component layout of the DSP and preamplifier PC board.

View 2 - Soldering Side

Illustrates the soldering side of the driver circuit PC board.

View 5 - Soldering Side

Component layout of the primary circuit and power switch PC boards.

IC Block Diagrams and Descriptions

ADV7172 KSTZ

Details the ADV7172KSTZ video encoder's function and pin configuration.

ADV7183 AKST

Block diagram and terminal descriptions for the ADV7183AKST video decoder.

CS42518

Block diagram and description for the CS42518 8-Ch Codec.

NJW1157

IC details for the NJW1157 8-channel electronic volume with input selector.

TC74 HCT7007 AF

Hex buffer block diagram and truth table.

Microprocessor Terminal Descriptions

Adjustment and Confirmation Procedures

Idling Current Adjustment

Procedure for adjusting idling current for front/center and surround channels.

Confirmation of Protection Circuit

Speaker Relay Confirmation

Checks speaker relay operation during power ON/OFF cycles.

Test Mode Entry and Operation

Guide on entering and navigating test modes for various functions.

Protection Circuit Confirmation

Verifies channel protection status through voltage and current detection tests.

Operation Check of Voltage Sensor and Thermal Protector

Test Mode for FL Tube

Procedure to enter specific test modes for FL tube display segments.

Packing Procedures

Exploded View - Parts List