Onkyo TX-SR503E Service Manual

TX-SR503/503E/8350
SERVICE MANUAL
SERVICE MANUAL
TX-SR503 Black and Silver and Golden models
120V AC, 60Hz
230-240V AC, 50Hz
120V/220-230V AC, 50/60Hz
220-230V AC, 50/60Hz
B MDD, B MDC, S MDC
B MPA, S MPA
B MWT, S MWT, G MWT
G MGR, G MGQ, G MGK
TX-SR503E
Black and Silver models
230-240V AC, 50HzB MPP, S MPP
TX-SR8350
Golden model
220-230V AC, 50/60HzG MGR
Ref. No. 3863
042005
MODEL TX-SR503
MODEL TX-SR503E
MODEL TX-SR8350
AV RECEIVER
AUDIO LR
TONE
+
STEREO LISTENING MODE DISPLAY DIGITAL INPUT DIMMER MEMORY TUNING MODE
RETURN
TUNING / PRESET
ENTER
SETUP
STANDBY
STANDBY/ON
CLEAR
PHONES
MULTl CH DVD VIDEO 1 VIDEO 2
VCR
VIDEO 3 TAPE TUNER CD
VIDEO
VIDEO 3 INPUT
MASTER VOLUME
A SPEAKERS B
MUTING
PREVIOUS
MENU
GUIDE
TOP MENU
SP A / B
SETUPRETURN
RANDOM
SUBTITLE
PLAY MODE
AUDIO REPEAT
RC
-
607M
--
/
---
TAPE /AM P
M
D
CDR
CABLE
ON STANDBY
DIMMER SLEEP
10 11 12
INPUT SELECTOR
DVD
HDD
REMOTE MODE
V 1 V 2 V 3
C DTAPE TUNE R
DVD
MULTI CH
LISTENING MODE
TV
DISPLAY
TEST TONE CH SEL
SURROUND STEREO
CINE FLTR
LEVEL
+
LEVEL
-
L NIGHT
VOL
VOL
SAT
VCR
TV
DVD
RECEIVER
C D
INPUT
+
10
0
CLR
123
456
789
ENTER
CH
DISC
RC-607M
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
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.

Onkyo TX-SR503E Specifications

General

Channels	7.1
Tuning range	FM/AM
Output power per channel	75 W (8 ohms, 20 Hz-20 kHz, 0.08% THD)
Impedance	6 ohms - 16 ohms
Frequency response	10 Hz-100 kHz
Input sensitivity	200 mV
Speaker load impedance	6 ohms - 16 ohms
Digital inputs	2 Optical, 1 Coaxial
Digital Audio Inputs	2 Optical, 1 Coaxial
Video Connections	Component, Composite, S-Video
Weight	10.5 kg
HDMI Inputs	No
Audio Formats Supported	Dolby Digital, DTS
Video Formats Supported	Composite video, S-Video
Total harmonic distortion	0.08 %
Input Sensitivity/Impedance	200 mV/47 kohms
Video Inputs/Outputs	Component, Composite, S-Video
Dimensions (W x H x D)	435 x 150 x 377 mm
Signal to noise ratio	100 dB (Line, IHF-A)
Signal-to-Noise Ratio	100 dB (Line, IHF-A)
Output	75 W per channel (8 ohms, 20 Hz-20 kHz, 0.08% THD)

Summary

AV Receiver Models and Safety Information

Safety-Related Component Warning

Critical components identified by mark for risk of fire and electric shock.

Specifications

Amplifier Section Specifications

Service Procedures

Fuse Replacement and Unit Initialization

Steps for replacing fuses and resetting the unit to factory settings.

Operation Check-1: Speaker Protect-1 (DC Voltage Detection)

DC Voltage Detection Procedure

Step-by-step guide to check speaker protection status using DC voltage detection.

Operation Check-2: Speaker Protect-2 (Current Detection)

Current Detection Procedure

Steps to check speaker protection status using current detection with dummy loads.

Operation Check-3: Control of Power Supply

Sensor Checks (Output and Thermal)

Procedures to verify output sensor and thermal sensor functionality.

Operation Check-4: DSP Debug Mode

DSP Debug Mode Operation

Instructions for entering, exiting, and understanding the DSP debug mode display.

Schematic Diagrams-1: Audio Input Section

Audio Input Circuitry

Detailed schematic of the audio signal processing path for inputs like CD, Tape, Video.

Schematic Diagrams-2: DSP Section

DSP Circuitry

Detailed schematic of the Digital Signal Processing (DSP) unit and its connections.

Schematic Diagrams-3: Power Amplifier Section

Power Amplifier Circuitry (Part 1)

Detailed schematics for the power amplifier stages for SL, SR, SBL, SBR channels.

Schematic Diagrams-3: Power Amplifier Section-2

Power Amplifier Circuitry (Part 2)

Detailed schematics for the power amplifier stages for FL, FR, C, SW channels.

Schematic Diagrams-4: Power Amplifier Section-2

Speaker Output Stage Schematics

Detailed schematics for speaker output stages and related components.

Schematic Diagrams-5: Speaker Terminal Section

Speaker Terminal Connections

Schematic showing connections to speaker terminals and related relays/protection circuits.

Schematic Diagrams-6: Power Supply Section

Power Supply Circuitry

Schematics for the power supply unit, including AC input and voltage distribution.

Schematic Diagrams-7: Display Section

Display Control Circuitry

Detailed schematic of the front panel display and its control circuits.

Schematic Diagrams-8: Video Section

Video Input/Output Circuitry

Schematics for composite, S-Video, and component video signal processing.

IC Block Diagram and Terminal Descriptions-1: Q111 BU1924FS (RDS Decoder)

IC Block Diagrams and Terminal Descriptions-2: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

IC Block Diagrams and Terminal Descriptions-3: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

IC Block Diagrams and Terminal Descriptions-4: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

IC Block Diagrams and Terminal Descriptions-5: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 3)

IC Block Diagrams and Terminal Descriptions-6: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 4)

IC Block Diagrams and Terminal Descriptions-7: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 5)

IC Block Diagrams and Terminal Descriptions-8: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 6)

IC Block Diagrams and Terminal Descriptions-9: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 7)

IC Block Diagrams and Terminal Descriptions-10: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 8)

IC Block Diagrams and Terminal Descriptions-11: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 9)

IC Block Diagrams and Terminal Descriptions-12: Q201 CS494003CQZ (Multi-Standard Audio Decoder)

Terminal Descriptions (Part 10)

IC Block Diagram and Terminal Descriptions-13: Q281 MX26LV040 (Flash Memory)

Block Diagram and Pin Layout

IC Block Diagrams and Terminal Descriptions-14: Q421 CS42518 (8-Ch Codec)

Block Diagram

IC Block Diagrams and Terminal Descriptions-15: Q421 CS42518 (8-Ch Codec)

Pin Layout and Terminal Descriptions

IC Block Diagrams and Terminal Descriptions-16: Q421 CS42518 (8-Ch Codec)

Terminal Descriptions (Part 1)

IC Block Diagrams and Terminal Descriptions-17: Q421 CS42518 (8-Ch Codec)

Terminal Descriptions (Part 2)

IC Block Diagram and Terminal Descriptions-18: Q802 M66005 (FL Tube Driver)

IC Block Diagrams and Terminal Descriptions-19: Q1503, Q1512, Q1513 LA7956 (Video Switch)

IC Block Diagrams and Terminal Descriptions-20: Q1519 NJM2585L (Video Amplifier)

Block Diagram and Truth Table

IC Block Diagrams and Terminal Descriptions-21: Q5501 NJW1157 (Electronic Volume)

Block Diagram (Part 1)

Visual representation of the NJW1157 electronic volume IC's functional blocks.

IC Block Diagrams and Terminal Descriptions-22: Q5501 NJW1157 (Electronic Volume)

Terminal Descriptions (Part 2)

Detailed explanations of the NJW1157 IC's various terminal functions.

IC Block Diagrams and Terminal Descriptions-23: Q5502 NJU7311AM (Analog Switch)

IC Block Diagrams and Terminal Descriptions-24: Q5640 AN34060A (Voltage Regulator)

Block Diagram and Terminals

Microprocessor Terminal Descriptions-1: Q701 M30622MGP-236FPU0

Terminal Functions (Part 1)

Microprocessor Terminal Descriptions-2: Q701 M30622MGP-236FPU0

Terminal Functions (Part 2)

Adjustment Procedure-1: Idling Current Adjustment

Idling Current Adjustment Steps

Step-by-step procedure for adjusting the idling current of the amplifier.

Adjustment Procedure-2: Idling Current Adjustment Fig-1

Adjustment Points Diagram

Visual guide indicating the location of trimming resistors and test points for adjustment.

Exploded View Parts List

Part Number and Description

PC Board Parts List

Component Details by Board Number