Onkyo TX-SR303 - Service Manual

TX-SR303/303E
SERVICE MANUAL
SERVICE MANUAL
TX-SR303 Silver model
Ref. No. 3862
042005
AV RECEIVER
120V AC, 60HzMDD
TX-SR303E Silver model
230-240V AC, 50HzMPP
MODEL TX-SR303
MODEL TX-SR303E
RC-605S
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/VCR VIDEO 2 VIDEO 3 TAPE TUNER CD
MASTER VOLUME
A SPEAKERS B
MUTING
MENUTOP MENU
SP A / B
SETUPRETURN
RANDOM
SUBTITLE
PLAY MODE
AUDIO REPEAT
RC
-
605S
--
/
---
TAPE /AM P
ON STANDBY
DIMMER SLEEP
INPUT SELECTOR
REMOTE MODE
V 1 V 2 V 3
C DTAPE TUNER
DVD
MULTI CH
LISTENING MODE
DISPLAY
TEST TONE CH SEL
SURROUND STEREO
CINE FLTR
LEVEL
+
LEVEL
-
L NIGHT
VOL
CDR
MD
DVD
RECEIVER
C D
+
10
0
CLR
123
456
789
ENTER
CH
DISC
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.

Summary

Specifications

Service Procedure

Fuse Replacement and Safety Checks

Procedures for fuse replacement, safety checks, initialization, and version check.

Exploded Views-1

Exploded Views-2

Schematic Diagrams-1: Audio Input Section

Schematic Diagrams-2: DSP Section

Schematic Diagrams-3: Power Amplifier Section-1

Schematic Diagrams-4: Power Amplifier Section-2

Schematic Diagrams-5: Speaker Terminal Section

Schematic Diagrams-6: Power Supply Section

Schematic Diagrams-7: Display Section

Schematic Diagrams-8: Video Section

Printed Circuit Board Views-1: U01 Display PC Board

Printed Circuit Board Views-5: U03 Switch PC Board

U04 Headphone Jack PC Board

Component layout for the headphone jack PC board.

Printed Circuit Board Views-8: U06 Speaker Terminal PC Board

U07 SBR Amplifier PC Board

Component layout for the SBR amplifier PC board.

U08 Thermal Sensor PC Board

Component layout for the thermal sensor PC board.

Printed Circuit Board Views-9: U11 Power Supply-1 PC Board

Printed Circuit Board Views-10: U13 Power Supply-2 PC Board

U14 Sec. Terminal-1 PC Board

Component layout for the speaker terminal section PC board.

Printed Circuit Board Views-11: U15 Speaker Terminal PC Board

Printed Circuit Board Views-12: U16 Video PC Board

IC Block Diagrams & Terminal Descriptions-1: BU1924 FS (RDS Decoder)

IC Block Diagrams & Terminal Descriptions-2: CS494003 CQZ (Multi-Standard Audio Decoder)

IC Block Diagrams & Terminal Descriptions-13: MX29 LV040 (Flash Memory)

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

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

IC Block Diagrams & Terminal Descriptions-18: M66005 FP (FL Tube Driver)

IC Block Diagrams & Terminal Descriptions-19: LA7956 (Video Switch)

IC Block Diagrams & Terminal Descriptions-20: NJW1157 (Volume;Input Selector)

IC Block Diagrams & Terminal Descriptions-23: NJU7311 AM (Analog Function Switch)

IC Block Diagrams & Terminal Descriptions-23: AN34060 A (3-Output Voltage Regulator)

FL Tube View: Q801 (16 BT127 GNK)

Microprocessor Terminal Descriptions-1: Q701 (M30622 MGP)

Adjustment Procedure-1: Idling Current Adjustment

Packing Procedure

Exploded View Parts List

Onkyo TX-SR303 Specifications

General

Brand	Onkyo
Model	TX-SR303
Category	Receiver
Language	English