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MHC-GNX60/GNX70/GX9900
SERVICE MANUAL
Ver. 1.0 2005.03
• MHC-GNX60/GNX70/GX9900 are composed of following models.
As for the service manual, it is issued for each component model, then, please refer to it.
COMPONENT MODEL NAME
COMPACT DISC DECK RECEIVER SYSTEM
SPEAKER
SS-GNX70RS
SYSTEM
(MHC-GNX70)
SPECIFICATIONS
General
Power requirements
US model:
Australian model:
Argentina models:
Other models:
Power consumption
MHC-GNX60
MHC-GNX70
MHC-GX9900
Dimensions (w/h/d) (Approx.)
Mass (Approx.)
MHC-GNX60
MHC-GNX70
MHC-GX9900
Supplied accessories:
Design and specifications are subject to change without notice.
Sony Corporation
9-879-543-01
Audio Group
2005C02-1
Published by Sony Engineering Corporation
© 2005.03
FRONT SPEAKER
SURROUND SPEAKER
120 V AC, 60 Hz
230 – 240 V AC, 50/60 Hz
220 V AC, 50/60 Hz
120 V, 220 V or 230 –
240 V AC, 50/60 Hz
Adjustable with voltage selector
200 watts
225 watts
250 watts
280 x 360 x 398.5 mm
11.3 kg
12.1 kg
11.8 kg
Remote Commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Front speaker pads (8)
Surround speaker pads (8)
(MHC-GNX70/GX9900)
MHC-GNX60
MHC-GNX70
HCD-GNX60
HCD-GNX70
SS-GNX60
SS-GNX100
SS-RSX80
PARTS LIST
Ref. No.
Part No.
Description
ACCESSORIES
************
1-478-518-21 COMMANDER, STANDARD (RM-SC3)
1-501-374-12 ANTENNA, LOOP (AM)
1-793-184-23 CONNECTOR (F TYPE ADAPTOR) (FM)
2-547-453-11 MANUAL, INSTRUCTION (ENGLISH)
2-547-453-21 MANUAL, INSTRUCTION (FRENCH) (E2, E3)
2-547-453-31 MANUAL, INSTRUCTION (SPANISH) (E2, E51, AR)
4-210-254-02 CUSHION (FOOT) (7mm, 8pcs) (for SPEAKER)
• Abbreviation
E2
: 120 V AC Area in E model
E3
: 240 V AC Area in E model
E51
: Chilean and Peruvian model
AR
: Argentina model
MiNi Hi-Fi COMPONENT SYSTEM
US Model
MHC-GX9900
E Model
Australian Model
MHC-GNX60/GNX70
MHX-GX9900
HCD-GX9900
SS-GNX100
SS-RSX80
Remarks

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Summarization of Contents

SERVICE MANUAL
COMPONENT MODEL NAME
Lists component model names for different system configurations.
SPECIFICATIONS OVERVIEW
Details technical specifications for power, dimensions, and mass.
SAFETY CHECK-OUT
LEAKAGE MEASUREMENT
Specifies AC leakage limits and measurement methods for safety.
UNLEADED SOLDER HANDLING
Provides characteristics and handling notes for unleaded solder.
SERVICING NOTES
OPTICAL PICK-UP HANDLING
Precautions for handling sensitive optical pick-up components to prevent damage.
LASER DIODE CHECKS
Guidelines for safely checking laser diode emission and focus search operation.
GENERAL INFORMATION
LOCATING CONTROLS
Identifies button locations and corresponding reference pages on the main unit and front panel.
DISASSEMBLY PROCEDURES
DISASSEMBLY FLOWCHART
Outlines the step-by-step procedure for disassembling the unit.
TEST MODES
BASIC TEST MODES
GC Test, MC Test, and Cold Reset procedures for diagnostics.
ADVANCED TEST MODES
VACS, Tuner Step, CD Service, Aging, Error Codes, Repeat, and Ship Modes.
MECHANICAL ADJUSTMENTS
ADJUSTMENT PRECAUTIONS
General precautions for mechanical adjustments, including cleaning and demagnetizing.
TORQUE MEASUREMENT SPECIFICATIONS
Table listing torque specifications for various mechanical adjustments.
ELECTRICAL ADJUSTMENTS
DECK SECTION ADJUSTMENTS
Adjustment settings for the deck section, including test tape and signal levels.
HEAD AZIMUTH ADJUSTMENT
Procedure for adjusting the record/playback head azimuth.
CD SECTION ADJUSTMENTS
CD SECTION ADJUSTMENT NOTES
Notes on CD block adjustment, including using specific discs and oscilloscopes.
S-CURVE CHECK PROCEDURE
Procedure for checking the S-curve waveform for CD focus search.
SCHEMATIC DIAGRAMS
DIAGRAM CONVENTIONS & ABBREVIATIONS
Notes on schematic conventions, component identification, and abbreviations.
IC PIN FUNCTION DESCRIPTIONS
CD BOARD IC DETAILS
Pin functions for ICs on the CD board, including waveforms and block diagrams.
EXPLODED VIEWS
HARDWARE & ACCESSORY LIST
Lists hardware and accessories mentioned in the exploded views.
ABBREVIATIONS USED
Lists abbreviations used in the exploded views section.
CASE (TOP) & REAR PANEL
Exploded view of the case top and rear panel section with part numbers.
ELECTRICAL PARTS LIST
CD BOARD COMPONENTS
List of capacitors used in the CD board with part numbers and specifications.

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