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Onkyo TX-SR503 Service Manual

Onkyo TX-SR503
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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.

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Onkyo TX-SR503 Specifications

General IconGeneral
Channels7.1
Power Output75 W per channel (8 ohms, 20 Hz-20 kHz, 0.08% THD)
HDMI Inputs0
HDMI Outputs0
Response Bandwidth10 Hz - 100 kHz
Signal-To-Noise Ratio100 dB
THD0.08%
Input Impedance47 kOhm
Input Sensitivity200 mV
Audio D/A Converter192 kHz/24-bit
Surround Sound EffectsTheater-Dimensional
Tuner Presets40
Width435 mm
Frequency Response10 Hz - 100 kHz
Speaker Impedance6 - 16 Ohm
Audio FormatsDolby Digital, DTS, Dolby Pro Logic II
Amplifier Output Details75W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
Tuning DisplayFluorescent
Video Inputs/OutputsComposite
Digital Audio InputsOptical, Coaxial
Analog Audio InputsRCA

Summary

Safety Related Component Warning

Critical Components for Safety

Components marked with a symbol are critical for fire and electric shock risk.

Service Procedures

Replacing Fuses

Instructions on replacing fuses, emphasizing using the correct type for fire hazard protection.

Operation Checks

Speaker Protect-1 (DC Voltage Detection)

Procedure for checking speaker protection status via DC voltage detection.

Speaker Protect-2 (Current Detection)

Procedure for checking speaker protection status via current detection using dummy loads.

Power Supply Control Checks

Procedures for checking output sensor and thermal sensor functions.

Diagrams and Schematics

Schematics - Power Amplifier and Speaker Terminals

Detailed circuit diagrams for the power amplifier and speaker terminal sections.

IC Block Diagrams and Terminal Descriptions

IC Q201: CS494003CQZ (Audio Decoder)

Block diagram, pin layout, and detailed terminal descriptions for the CS494003CQZ audio decoder IC.

IC Q421: CS42518 (Audio Codec)

Block diagram and detailed terminal descriptions for the CS42518 audio codec IC.

Microprocessor and Adjustment Procedures

Microprocessor Terminal Descriptions (Q701)

Detailed descriptions of the M30622MGP microprocessor pins (Part 1 & 2).

Idling Current Adjustment Procedures

Step-by-step guide for adjusting the idling current, including diagrams and specifications.

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