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US Model
MHC-RG4SR/RG20/RG30T
Canadian Model
MHC-RG20/RG30T
AEP Model
UK Model
MHC-RG20
Australian Model
E Model
MHC-DX10
SERVICE MANUAL
MINI HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
9-873-226-01
2001F1600-1
© 2001.6
· MHC-DX10/RG4SR/RG20/RG30T are composed of following models.
As for the service manual, it is issued for each component model,
then please refer to them.
Ver 1.0 2001. 06
MHC-DX10/RG4SR/RG20/RG30T
COMPONENT MODEL NAME
PARTS LIST
Part No.
Description
Remarks
1-476-513-11 COMMANDER, STANDARD (RM-SR200)
1-501-374-11 ANTENNA, LOOP(AM)
1-501-659-41 ANTENNA (FM) (EXCEPT AEP, UK)
1-501-804-11 ANTENNA (FM) (AEP, UK)
0 1-569-007-11 ADAPTOR, CONVERSION 2P (E3)
0 1-569-008-21 ADAPTOR, CONVERSION 2P (E51, SP, TW)
0 1-770-019-11 ADAPTOR, CONVERSION PLUG 3P (UK)
4-210-254-01 CUSHION (FOOT)
4-228-953-01 COVER, BATTERY (FOR RM-SR200)
4-235-103-11 MANUAL, INSTRUCTION (ENGLISH)
4-235-103-21 MANUAL, INSTRUCTION (FRENCH) (CND)
4-235-103-31 MANUAL, INSTRUCTION (SPANISH) (E51, MX, AR)
4-235-103-41 MANUAL, INSTRUCTION (FRENCH, SPANISH)
(AEP, E2, E3, SP)
4-235-103-51 MANUAL, INSTRUCTION (GERMAN, DUTCH,
ITALIAN, SWEDISH, POLISH) (AEP)
4-235-103-61 MANUAL, INSTRUCTION (CHINESE) (E3, SP, TW)
4-235-103-71 MANUAL, INSTRUCTION (PERSIAN) (E3)
4-235-104-11 MANUAL, INSTRUCTION (DANISH, FINNISH) (AEP)
4-235-104-21 MANUAL, INSTRUCTION (PORTUGUESE) (AEP)
4-235-105-11 MANUAL, INSTRUCTION (GREEK) (AEP)
4-235-105-21 MANUAL, INSTRUCTION
(HUNGARIAN, CZECH) (AEP)
4-235-105-31 MANUAL, INSTRUCTION (TURKISH) (AEP)
4-235-105-41 MANUAL, INSTRUCTION (SLOVAK) (AEP)
·
Abbreviation
AR
: Argentine model
CND
: Canadian model
E2
: 120V AC Area in E model
E3
: 240V AC Area in E model
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
E51
: Chilean and peruvian model
MX
: Mexican model
SP
: Singapore model
TW
: Taiwan model
MHC-DX10
MHC-RG4SR
MHC-RG20
MHC-RG30T
COMPACT DISK DECK
HCD-DX10
HCD-RG4SR
HCD-RG20
HCD-RG30T
RECEIVER SYSTEM
FRONT SPEAKER
SS-DX10
SS-RG4
SS-RG20
SS-RG30T
REAR SPEAKER
--
SS-RS60
--
--


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MHC-DX10/RG4SR/RG20/RG30T
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver.
Date
Description of Revision
1.0
2001.06
New


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HCD-DX10/RG4SR/RG20/RG30T
US Model
HCD-RG4SR/RG20/RG30T
Canadian Model
HCD-RG20/RG30T
AEP Model
UK Model
HCD-RG20
E Model
Australian Model
HCD-DX10
SERVICE MANUAL
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-873-225-03
2003K16-1
© 2003.11
SPECIFICATIONS
Ver 1.2 2003. 11
Photo : HCD-DX10
· HCD-DX10/RG4SR/RG20/RG30T is the
tuner, deck, CD and amplifier section in
MHC-DX10/RG4SR/RG20/RG30T.
Model Name Using Similar Mechanism
NEW
CD
CD Mechanism Type
CDM58F-K6
Section
Optical Pick-up Name
KSM-213D
Tape deck
Model Name Using Similar Mechanism
NEW
Section
Tape Transport Mechanism Type
CWL44FF29
Amplifier section
Canadian models:
HCD-RG30T
Continuous RMS power output (reference)
75 + 75 watts (6 ohms at 1
kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 50 W)
HCD-RG20
Continuous RMS power output (reference)
60 + 60 watts (6 ohms at 1
kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 30 W)
European model:
HCD-RG20
DIN power output (rated) 40 + 40 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
50 + 50 watts (6 ohms at 1
kHz, 10% THD)
Music power output (reference)
95 + 95 watts (6 ohms
at 1 kHz, 10% THD)
Other model:
HCD-DX10
The following measured at AC 120, 220, 240 V
50/60 Hz
DIN power output (rated) 40 + 40 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
50 + 50 watts (6 ohms at 1
kHz, 10% THD)
Inputs
GAME (AUDIO) IN (phono jack):
voltage 450 mV,
impedance 47 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
Front speaker:
accepts impedance of 6 to
16 ohms
Surround speaker (HCD-RG4SR only):
accepts impedance of 6 to
16 ohms
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
=780 nm)
Emission duration:
continuous
Frequency response
2 Hz ­ 20 kHz (
±0.5 dB)
Wavelength
780 ­ 790 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Tape deck section
Recording system
4-track 2-channel stereo
Frequency response
40 ­ 13,000 Hz (
±3 dB),
using Sony TYPE I
cassette
AUDIO POWER SPECIFICATIONS:
(HCD-RG4SR USA model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from
120 ­ 10,000 Hz; rates 100 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 50 W)
(HCD-RG30T USA model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from
120 ­ 10,000 Hz; rates 75 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 30 W)
(HCD-RG20 USA model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from
120 ­ 10,000 Hz; rates 60 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 30 W)
MINI HIFI COMPONENT SYSTEM
-- Continued on next page --


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2
HCD-DX10/RG4SR/RG20/RG30T
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
To Exposed Metal
Parts on Set
0.15
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
General
Power requirements
North American models:
120 V AC, 60 Hz
European models:
230 V AC, 50/60 Hz
Australian models:
230 ­ 240 V AC,
50/60 Hz
Mexican models:
120 V AC, 50/60 Hz
Other models:
120 V, 220 V or
230 ­ 240 V AC,
50/60 Hz
Adjustable with voltage
selector
Power consumption
USA models:
HCD-RG4SR:
160 watts
HCD-RG30T:
115 watts
HCD-RG20:
95 watts
Canadian models:
HCD-RG30T:
115 watts
HCD-RG20:
95 watts
European model:
HCD-RG20:
85 watts
1.0 watts (at the Power
Saving Mode)
Other model:
HCD-DX10:
85 watts
Dimensions (w/h/d)
Approx. 280
× 325 × 421 mm
Mass
North American models:
HCD-RG4SR:
Approx. 8.7 kg
HCD-RG30T:
Approx. 8.2 kg
HCD-RG20:
Approx. 7.8 kg
European model:
HCD-RG20:
Approx. 8.1 kg
Other model:
HCD-DX10:
Approx. 8.2 kg
Design and specifications are subject to change
without notice.
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 ­ 108.0 MHz
Antenna
FM lead antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
Pan-American models:
530 ­ 1,710 kHz (with the
interval set at 10 kHz)
531 ­ 1,710 kHz (with the
interval set at 9 kHz)
European and Middle Eastern models:
531 ­ 1,602 kHz (with the
interval set at 9 kHz)
Other models:
531 ­ 1,602 kHz (with the
interval set at 9 kHz)
530 ­ 1,710 kHz (with the
interval set at 10 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz


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3
HCD-DX10/RG4SR/RG20/RG30T
PARTS No.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
TABLE OF CONTENTS
MODEL IDENTIFICATION
-- BACK PANEL --
· Abbreviation
CND : Canadian model
AUS
: Australian model
AR
: Argentina model
SP
: Singapore model
TW
: Taiwan model
MX
: Mexican model
MY
: Malaysia model
E2
: 120V AC Area in E model
E3
: 240V AC Area in E model
E51
: Chilean and Peruvian model
1. GENERAL ·········································································· 4
2. DISASSEMBLY ································································ 6
3. TEST MODE ···································································· 11
4. ELECTRICAL ADJUSTMENTS ······························· 13
5. DIAGRAMS ······································································ 15
5-1. Circuit Board Location ················································ 15
5-2. Block Diagrams ··························································· 16
Tuner/CD Section ························································ 16
Main Section ······························································· 17
5-3. Printed Wiring Board CD Section ····························· 18
5-4. Schematic Diagram CD Section ································ 19
5-5. Printed Wiring Board Main Section ·························· 20
5-6. Schematic Diagram Main Section (1/4) ···················· 21
5-7. Schematic Diagram Main Section (2/4) ···················· 22
5-8. Schematic Diagram Main Section (3/4) ···················· 23
5-9. Schematic Diagram Main Section (4/4) ···················· 24
5-10. Printed Wiring Board Address Sensor,
Driver Motor Section ··················································· 25
5-11. Printed Wiring Board Panel Section ·························· 26
5-12. Schematic Diagram Panel Section ···························· 27
5-13. Printed Wiring Board Power Section ························ 28
5-14. Printed Wiring Board Trans Section ·························· 29
5-15. Schematic Diagram Trans Section ···························· 30
5-16. IC Block Diagrams ······················································ 31
5-17. IC Pin Function Description ········································ 34
6. EXPLODED VIEWS
6-1. Main Section ······························································· 36
6-2. Front Panel Section ····················································· 37
6-3. Main Board Section ····················································· 38
6-4. CD Mechanism Deck Section ····································· 39
7. ELECTRICAL PARTS LIST ······································· 40
MODEL
RG20: US, CND models
RG20: AEP, UK models
DX10: E2, E3, E51, TW models
DX10: AUS, AR, MX models
RG30T
RG4SR
DX10: MY, SP models
PARTS No.
4-234-701-0s
4-234-701-1s
4-234-701-2s
4-234-701-3s
4-234-701-4s
4-234-701-5s
4-234-701-6s