Onkyo A-933 Service Manual

A-933
SERVICE MANUAL
SERVICE MANUAL
INTEGRATED AMPLIFIER
Silver and Black models
MODEL A-933
230-240V AC, 50Hz
230-240V AC, 50Hz
S UPP, S MPP
B UPP, B MPP
Ref. No. 3876
032005
RC-613S
STANDBY/ON
ON(G)
STANDBY(R)
TUNER
PHONO
CD
MD
TAPE /CDR
LINE
TAP E
/
CDR
PRESET
VOLUME
VOLUME
CD
MD
PRESET
CLOCK
CALL
SLEEP
INPUT
ON
STANDBY
R
C
-
613
S
FM AM CLEAR
78
9
10/ 0
>
10
4
56
231
GROUP
TIMER
ENTER
MEMORY REPEAT DISPLAY
RANDOM P MODE SCROLL
MUTING
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 A-933 Specifications

General

Frequency range	10 - 60000 Hz
Signal-to-Noise Ratio (SNR)	100 dB
Total Harmonic Distortion (THD)	0.08 %
Product color	Black
Dimensions (WxDxH)	275 x 103 x 328 mm
Power requirements	AC 220-240 V, 50 Hz
Power consumption (standby)	0.9 W
Power consumption (typical)	100 W

Weight and Dimensions

Weight	7500 g

Summary

Safety-Related Component Warning

Product Specifications

Service Procedures

Replacing the Fuses

Instructions for replacing fuses, emphasizing using identical types.

Unit Initialization Procedure

Steps to initialize the unit by pressing specific buttons and disconnecting power.

Pre-Shipment Setting Configuration

Specifies default settings for power, tone controls, and volume before shipping.

Exploded View Assembly

Schematic Diagrams - Pre-Amplifier and Power Supply

Schematic Diagrams - Microprocessor Section

Schematic Diagrams - Power Amplifier Section

U01 Power Amplifier PC Board Views

U01 Power Amplifier PC Board - Side A

Printed circuit board layout for the U01 Power Amplifier, component side.

U01 Power Amplifier PC Board - Side B

Printed circuit board layout for the U01 Power Amplifier, soldering side.

U02 Pre-Amplifier PC Board Views

U02 Pre-Amplifier PC Board - Side A

Printed circuit board layout for U02 Pre-Amplifier, NAAF-8499 & NAAF-8500, side A.

U02 Pre-Amplifier PC Board - Side B

Printed circuit board layout for U02 Pre-Amplifier, NAAF-8499 & NAAF-8500, side B.

U04 Volume PC Board Views

U04 Volume PC Board - Side A

Printed circuit board layout for U04 Volume PC Board, NAETC-8501 & NAETC-8502, side A.

U04 Volume PC Board - Side B

Printed circuit board layout for U04 Volume PC Board, NAETC-8501 & NAETC-8502, side B.

U06 Headphone Jack PC Board Views

U06 Headphone Jack PC Board - Side A

Printed circuit board layout for U06 Headphone Jack PC Board, NAETC-8503, side A.

U06 Headphone Jack PC Board - Side B

Printed circuit board layout for U06 Headphone Jack PC Board, NAETC-8503, side B.

U08 Microprocessor PC Board Views

U08 Microprocessor PC Board - Component Side

Printed circuit board layout for U08 Microprocessor PC Board, NADG-8505, component side.

U08 Microprocessor PC Board - Soldering Side

Printed circuit board layout for U08 Microprocessor PC Board, NADG-8505, soldering side.

U09 Power Supply PC Board Views

U09 Power Supply PC Board - Component Side

Printed circuit board layout for U09 Power Supply PC Board, NAPS-8506, component side.

U09 Power Supply PC Board - Soldering Side

Printed circuit board layout for U09 Power Supply PC Board, NAPS-8506, soldering side.

U10 Outlet PC Board Views

U10 Outlet PC Board - Component Side

Printed circuit board layout for U10 Outlet PC Board, NAPS-8507, component side.

U11 Power Switch PC Board Views

U11 Power Switch PC Board - Component Side

Printed circuit board layout for U11 Power Switch PC Board, NASW-8508, component side.

U13 Switch PC Board Views

U13 Switch PC Board - Component Side

Printed circuit board layout for U13 Switch PC Board, NAETC-8510, component side.

U13 Switch PC Board - Soldering Side

Printed circuit board layout for U13 Switch PC Board, NAETC-8510, soldering side.

IC Block Diagrams and Terminal Descriptions

Q204 NJU7313AM Block Diagram

Block diagram for the Q204 NJU7313AM Analog Function Switch IC.

Q204 NJU7313AM Terminal Descriptions

Detailed terminal descriptions for the Q204 NJU7313AM IC.

Microprocessor Terminal Descriptions - Part 1

Q701 MPD780022AGC-166-8BS Terminal Details

Terminal descriptions for the Q701 Microprocessor, part 1.

Microprocessor Terminal Descriptions - Part 2

Q701 MPD780022AGC-166-8BS Terminal Details (Continued)

Terminal descriptions for the Q701 Microprocessor, part 2.

Adjustment Procedure: DC Offset

When to Perform DC Offset Adjustment

Conditions requiring DC offset adjustment on the power amplifier PC board.

DC Offset Adjustment Procedure

Step-by-step guide to adjust DC offset on the power amplifier PC board.

Packing Procedure

Exploded View Parts List

PC Board Parts List - U01 Power Amplifier

U01 Power Amplifier PC Board Parts List

Comprehensive list of parts for the U01 Power Amplifier PC Board.

PC Board Parts List - U02, U04, U06

U02 Pre-Amplifier PC Board Parts List

Comprehensive list of parts for the U02 Pre-Amplifier PC Board.

U04 Volume PC Board Parts List

Comprehensive list of parts for the U04 Volume PC Board.

U06 Headphone Jack PC Board Parts List

Comprehensive list of parts for the U06 Headphone Jack PC Board.