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Sony MHC-790 - User Manual

Sony MHC-790
56 pages
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MHC-790
SERVICE
MANUAL
AEP
Model
«
MHC-790
is
composed
of
the
models
below.
Service
SPECIFICATIONS
manuals
are
issued
for
each
of
the
component
models,
Power
requirements
'
so
please
refer
to
each
of
the
manuals.
220
240V
AC,
50Hz
Power
consumption
COMPONENTS
MODEL
140W
.
Dimensions
Approx.
280
X
325
X
335
mm
(w/h/d)
TUNER,
DECK,
REMOTE
CD,
PLAYER,
AMp|
SPEAKER
incl.
projecting
parts
and
controls
HCD-H790
RM-S33
Mass
Approx.
8.3kg
SS-H790
Design
and
specifications
are
subject
to
change
without
notice.
MINI
Hi-Fi
COMPONENT
SYSTEM
SONY.
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Summary

Specifications

Parts List

Servicing Notes

Handling the Optical Pick-up Block

Precautions for handling the optical pick-up block to prevent electrostatic breakdown.

General Information

Index to Parts and Controls

Refers to pages for using controls and lists controls by function and location.

Disassembly Procedures

CD Mechanism Removal

Step-by-step procedure for removing the CD mechanism from the unit.

TC Mechanism Removal

Step-by-step procedure for removing the TC (Tape Cassette) mechanism.

Adjustments

Mechanical Adjustments

Precautions and procedures for mechanical adjustments like torque and tape tension.

Electrical Adjustments

Procedures for electrical adjustments like tape speed and playback level.

Record Bias Adjustment

Procedure for adjusting the record bias level for optimal recording performance.

Tuner Section

FM Tuned Indication Adjustment

Procedure to adjust the FM tuning indication lighting level.

CD Section

CD Focus Bias Adjustment

Procedure for adjusting the focus bias on the CD section.

CD Focus;Tracking Gain

Notes that this adjustment is not critical and has margin.

IC Terminal Explanations

IC101 Terminal Explanations

Details pin functions and descriptions for IC101.

IC110 Terminal Explanations

Details pin functions and descriptions for IC110.

IC501 Terminal Explanations

Details pin functions and descriptions for IC501.

Diagrams

CD Section Block Diagram

Illustrates the block diagram for the CD section of the unit.

Main Section Block Diagram

Illustrates the block diagram for the main section of the unit.

Panel Section Schematic Diagram

Provides the schematic diagram for the panel section of the unit.

BD Section Printed Wiring Boards

Shows the printed wiring board layouts for the BD section.

Audio Section Printed Wiring Boards

Shows the printed wiring board layouts for the audio section.

Audio Section Schematic Diagram

Provides the schematic diagram for the audio section of the unit.

IC Block Diagrams - Main Section

Illustrates IC block diagrams for the main section of the unit.

Exploded Views

Chassis Section Exploded View

Exploded view of the chassis section showing component parts.

Front Panel Section-1 Parts

Exploded view of the front panel section-1, listing component parts.

Front Panel Section-2 Parts

Exploded view of the front panel section-2, listing component parts.

TC Mechanism Section-1 Parts

Exploded view of the TC mechanism section-1, listing component parts.

TC Mechanism Section-2 Parts

Exploded view of the TC mechanism section-2, listing component parts.

CD Mechanism Section-1 Parts

Exploded view of the CD mechanism section-1, listing component parts.

CD Mechanism Section-2 Parts

Exploded view of the CD mechanism section-2, listing component parts.

Electrical Parts List

Electrical Parts List - Audio Board

Lists electrical components for the audio board, including capacitors, transistors, and resistors.

BD CD-LED Parts List

Lists components for the BD CD-LED section, including ICs, transistors, resistors, and switches.

HP;MIC Parts List

Lists components for the HP/MIC section, including capacitors, ICs, jacks, coils, and resistors.

HP;MIC, Karaoke, Leaf SW, Loading Parts List

Lists components for HP/MIC, Karaoke, Leaf SW, and Loading sections.

MAIN Board Parts List

Lists electrical components for the main board, including capacitors, ICs, and connectors.

MAIN Board Parts List (Continued)

Continues listing electrical components for the main board, including diodes and transistors.

MAIN Board Parts List (Front End, ICs, Transistors)

Lists front end components, ICs, and transistors for the main board.

MAIN Board Parts List (Resistors)

Lists various resistors for the main board, categorized by resistance value.

MAIN Board Parts List (Resistors - Continued)

Continues the list of resistors for the main board.

MAIN Board Parts List (Resistors, Variable Resistors, Relay, Transformer, Terminal)

Lists remaining components for the main board, including variable resistors, relays, transformers, and terminals.

AMS Encoder Panel Power Parts List

AMS Encoder Panel Power Parts List (Continued)

Continues the parts list for AMS Encoder Panel Power.

Power TC-SW Parts List

Power TC-SW Parts List (Resistors, Switches, Diodes)

Lists components for the Power TC-SW section, including resistors, switches, and diodes.

Transformer

Transformer Board Parts

Lists components for the Transformer Board, including connectors, fuses, and accessories.

Summary

Specifications

Parts List

Servicing Notes

Handling the Optical Pick-up Block

Precautions for handling the optical pick-up block to prevent electrostatic breakdown.

General Information

Index to Parts and Controls

Refers to pages for using controls and lists controls by function and location.

Disassembly Procedures

CD Mechanism Removal

Step-by-step procedure for removing the CD mechanism from the unit.

TC Mechanism Removal

Step-by-step procedure for removing the TC (Tape Cassette) mechanism.

Adjustments

Mechanical Adjustments

Precautions and procedures for mechanical adjustments like torque and tape tension.

Electrical Adjustments

Procedures for electrical adjustments like tape speed and playback level.

Record Bias Adjustment

Procedure for adjusting the record bias level for optimal recording performance.

Tuner Section

FM Tuned Indication Adjustment

Procedure to adjust the FM tuning indication lighting level.

CD Section

CD Focus Bias Adjustment

Procedure for adjusting the focus bias on the CD section.

CD Focus;Tracking Gain

Notes that this adjustment is not critical and has margin.

IC Terminal Explanations

IC101 Terminal Explanations

Details pin functions and descriptions for IC101.

IC110 Terminal Explanations

Details pin functions and descriptions for IC110.

IC501 Terminal Explanations

Details pin functions and descriptions for IC501.

Diagrams

CD Section Block Diagram

Illustrates the block diagram for the CD section of the unit.

Main Section Block Diagram

Illustrates the block diagram for the main section of the unit.

Panel Section Schematic Diagram

Provides the schematic diagram for the panel section of the unit.

BD Section Printed Wiring Boards

Shows the printed wiring board layouts for the BD section.

Audio Section Printed Wiring Boards

Shows the printed wiring board layouts for the audio section.

Audio Section Schematic Diagram

Provides the schematic diagram for the audio section of the unit.

IC Block Diagrams - Main Section

Illustrates IC block diagrams for the main section of the unit.

Exploded Views

Chassis Section Exploded View

Exploded view of the chassis section showing component parts.

Front Panel Section-1 Parts

Exploded view of the front panel section-1, listing component parts.

Front Panel Section-2 Parts

Exploded view of the front panel section-2, listing component parts.

TC Mechanism Section-1 Parts

Exploded view of the TC mechanism section-1, listing component parts.

TC Mechanism Section-2 Parts

Exploded view of the TC mechanism section-2, listing component parts.

CD Mechanism Section-1 Parts

Exploded view of the CD mechanism section-1, listing component parts.

CD Mechanism Section-2 Parts

Exploded view of the CD mechanism section-2, listing component parts.

Electrical Parts List

Electrical Parts List - Audio Board

Lists electrical components for the audio board, including capacitors, transistors, and resistors.

BD CD-LED Parts List

Lists components for the BD CD-LED section, including ICs, transistors, resistors, and switches.

HP;MIC Parts List

Lists components for the HP/MIC section, including capacitors, ICs, jacks, coils, and resistors.

HP;MIC, Karaoke, Leaf SW, Loading Parts List

Lists components for HP/MIC, Karaoke, Leaf SW, and Loading sections.

MAIN Board Parts List

Lists electrical components for the main board, including capacitors, ICs, and connectors.

MAIN Board Parts List (Continued)

Continues listing electrical components for the main board, including diodes and transistors.

MAIN Board Parts List (Front End, ICs, Transistors)

Lists front end components, ICs, and transistors for the main board.

MAIN Board Parts List (Resistors)

Lists various resistors for the main board, categorized by resistance value.

MAIN Board Parts List (Resistors - Continued)

Continues the list of resistors for the main board.

MAIN Board Parts List (Resistors, Variable Resistors, Relay, Transformer, Terminal)

Lists remaining components for the main board, including variable resistors, relays, transformers, and terminals.

AMS Encoder Panel Power Parts List

AMS Encoder Panel Power Parts List (Continued)

Continues the parts list for AMS Encoder Panel Power.

Power TC-SW Parts List

Power TC-SW Parts List (Resistors, Switches, Diodes)

Lists components for the Power TC-SW section, including resistors, switches, and diodes.

Transformer

Transformer Board Parts

Lists components for the Transformer Board, including connectors, fuses, and accessories.

Sony MHC-790 Specifications

General IconGeneral
BluetoothNo
CD PlayerYes
FM RadioYes
AM RadioYes
KaraokeYes
EqualizerYes
Speaker Type2-way
TypeMini Hi-Fi Component System

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