Sony MHC-RG270 User manual

SERVICE MANUAL
Ver. 1.1 2005.04
US Model
Canadian Model
MHC-GX355/GX555
AEP Model
UK Model
Australian Model
MHC-RG270/RG475S
E Model
MHC-RG270/RG475S/RG575S
MHC-GX355/GX555/RG270/
RG475S/RG575S
9-879-534-02
2005D05-1
© 2005.04
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
MINI HI-FI COMPONENT SYSTEM
•MHC-GX355/GX555/RG270/RG475S/RG575S are
composed of the following models.
As service manuals are issued for each component
model, please refer to them.
ACCESSORIES
Part No. Description Remark
SPECIFICATIONS
COMPONENT MODEL NAME
1-754-102-31 ANTENNA, LOOP (LW.MW)
1-754-243-11 ANTENNA (FM)
1-751-619-13 CORD, CONNECTION (VIDEO CABLE) (MX)
2-055-382-01 BATTERY COVER (for RM-SC3)
2-159-896-01 CUSHION (FOOT) (SPEAKER PADS) (8 pieces)
(MHC-GX355/RG270)
2-580-011-13 MANUAL, INSTRUCTION (ENGLISH) (EXCEPT EE, MX)
2-580-011-23 MANUAL, INSTRUCTION (FRENCH)
(CND, AEP, E2, E3, SP, EA)
2-580-011-33 MANUAL, INSTRUCTION (SPANISH)
(AEP, E51, MX, E2, SP, AR)
2-580-011-42 MANUAL, INSTRUCTION (GERMAN, DUTCH) (AEP)
2-580-011-52 MANUAL, INSTRUCTION (ITALIAN, PORTUGUESE) (AEP)
2-580-011-62 MANUAL, INSTRUCTION (SWEDISH, DANISH, FINNISH)
(EE)
2-580-011-72 MANUAL, INSTRUCTION (POLISH, CZECH, HUNGARIAN,
GREEK) (EE)
2-580-011-82 MANUAL, INSTRUCTION (RUSSIAN) (RU)
2-580-011-92 MANUAL, INSTRUCTION (ARABIC) (E3, EA)
2-580-012-12 MANUAL, INSTRUCTION (TRADITIONAL CHINESE) (SP)
2-593-196-01 CUSHION (FOOT-12) (SPEAKER PADS) (12 pieces)
(MHC-GX555/RG475S/RG575S)
A-1060-760-A OVERALL ASSY (RM-SC3)
MHC-GX355 MHC-GX555 MHC-RG270 MHC-RG475S MHC-RG575S
Compact Disc Deck Receiver HCD-GX355 HCD-GX555 HCD-RG270 HCD-RG475 HCD-RG575
SS-RG475 SS-RG575
Front Speaker SS-GX555 (Except Mexican) SS-RG475 (Except Mexican)
SS-RG475AV SS-RG575AV
(Mexican) (Mexican)
Sub woofer – SS-WG555 – SS-WG475 SS-WG575
Power requirements
North American model: 120 V AC, 60 Hz
European and Russian models:
230 V AC, 50/60 Hz
Australian model: 230 – 240 V AC, 50/60 Hz
Argentine model: 220 V AC, 50/60 Hz
Mexican model: 127 V AC, 60 Hz
Saudi Arabian model: 120 – 127, 220 or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Other models: 120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
USA model:
MHC-GX555: 285 watts
MHC-GX355: 210 watts
Canadian model:
MHC-GX555: 380 VA
MHC-GX355: 290 VA
European and Russian models:
MHC-RG475S: 300 watts
0.25 watts (at the Power
Saving Mode)
MHC-RG270: 190 watts
0.25 watts (at the Power
Saving Mode)
Mexican model:
MHC-RG575S: 300 watts
MHC-RG270: 210 watts
Other models:
MHC-RG575S: 300 watts
MHC-RG475S: 300 watts
MHC-RG270: 210 watts
Dimensions (w/h/d) (excl. speakers)
Approx. 280 ×325 ×
430 mm
Mass (excl. speakers)
North American model:
MHC-GX555: Approx. 10.5 kg
MHC-GX355: Approx. 10.0 kg
Canadian model:
MHC-GX555: Approx. 10.5 kg
MHC-GX355: Approx. 10.0 kg
European and Russian models:
MHC-RG475S: Approx. 10.5 kg
MHC-RG270: Approx. 8.7 kg
Other models:
MHC-RG575S: Approx. 10.5 kg
MHC-RG475S: Approx. 10.5 kg
MHC-RG270: Approx. 10.0 kg
Supplied accessories Remote Commander (1)
R6(Size AA)batteries(2)
AM loop antenna (1)
FM lead antenna (1)
Video cable (Mexican
model only) (1)
Speaker pads
MHC-GX555/RG575S/
RG475S (12)
MHC-GX355/RG270 (8)
Design and specifications are subject to change
without notice.
•Abbreviation
CND: Canadian model
AR : Argentine model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E51 : Chilean and Peruvian model
EA : Saudi Arabia model
EE : East European model
MX : Mexican model
RU : Russian model
SP : Singapore model

2
MHC-GX355/GX555/RG270/RG475S/RG575S
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 2005.03 New
1.1 2005.04 Addition of Argentine and Saudi Arabia models(MHC-RG270)
Addition of Argentine and Singapore models(MHC-RG575S)

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
US Model
Canadian Model
HCD-GX355/GX555
AEP Model
UK Model
Australian Model
HCD-RG270/RG475
E Model
HCD-RG270/RG475/RG575
HCD-GX355/GX555/
RG270/RG475/RG575
Ver. 1.4 2005.10
SPECIFICATIONS
9-879-533-05
2005J05-1
© 2005.10
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
Photo: HCD-RG575
•HCD-GX355 is the amplifier, CD player, tape
deck and tuner section in MHC-GX355.
•HCD-GX555 is the amplifier, CD player, tape
deck and tuner section in MHC-GX555.
•HCD-RG270 is the amplifier, CD player, tape
deck and tuner section in MHC-RG270.
•HCD-RG475 is the amplifier, CD player, tape
deck and tuner section in MHC-RG475S.
•HCD-RG575 is the amplifier, CD player, tape
deck and tuner section in MHC-RG575S.
Amplifier section
AUDIO POWER SPECIFICATIONS
(HCD-GX555/GX355 USA model only)
HCD-GX555
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, both channels driven, from
120 – 10,000 Hz: rated 145 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
HCD-GX355
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, both channels driven, from
120 – 10,000 Hz: rated 150 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
HCD-GX555
Front speaker
Continuous RMS power output (reference):
145 + 145 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
1kHz,80W)
Sub woofer
Continuous RMS power output (reference):
170 watts (6 ohms at
80 Hz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
80 Hz, 90 W)
HCD-GX355
Continuous RMS power output (reference):
150 + 150 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
1kHz,80W)
European and Russian models:
HCD-RG475
Front speaker
DIN power output (rated): 110 + 110 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
140 + 140 watts (6 ohms at
1 kHz, 10% THD)
Music power output (reference):
280 + 280 watts (6 ohms at
1 kHz, 10% THD)
Sub woofer
DIN power output (rated): 130 watts (6 ohms at
80 Hz, DIN)
Continuous RMS power output (reference):
160 watts (6 ohms at
80 Hz, 10% THD)
Music power output (reference):
320 watts (6 ohms at
80 Hz, 10% THD)
– Continued on next page –
Model Name Using Similar Mechanism NEW
CDM74KFS-F1BD81C (Except Mexican model) or
CD Mechanism Type CDM74KF-K6BD83S (US, Canadian, AEP, UK, East European,
CD Russian, E2, E51 models)/CDM74KFS-F1BD84 (Mexican model)
Section BU-F1BD81C (Except Mexican model) or
Base Unit Name BU-K6BD83S-WOD (US, Canadian, AEP, UK, East European,
Russian, E2, E51 models)/BU-F1BD84 (Mexican model)
Optical Pick-up Block Name KSM-215DCP or KSM-213DCP
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CWM43FF13
•Abbreviation
E2 : 120VAC Area in E model
E51: Chilean and Peruvian models

2
HCD-GX355/GX555/RG270/RG475/RG575
Other models:
HCD-RG575
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
Front speaker
DIN power output (rated): 100 + 100 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
125 + 125 watts (6 ohms at
1kHz, 10% THD)
Sub woofer
DIN power output (rated): 120 watts (6 ohms at
80 Hz, DIN)
Continuous RMS power output (reference):
150 watts (6 ohms at
80 Hz, 10% THD)
HCD-RG475
Front speaker
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 100 + 100 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
120 + 120 watts (6 ohms at
1kHz, 10% THD)
Sub woofer
DIN power output (rated): 120 watts (6 ohms at
80 Hz, DIN)
Continuous RMS power output (reference):
150 watts (6 ohms at
80 Hz, 10% THD)
HCD-RG270
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 100 + 100 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
125 + 125 watts (6 ohms at
1kHz, 10% THD)
Inputs
AUDIO IN (stereo mini jack):
voltage 250 mV,
impedance 47 kilohms
MIC (phone jack) (Latin American model only):
sensitivity 1 mV,
impedance 10 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8ohmsormore
VIDEO OUT (phono jack) (Mexican model only):
max. output level 1Vp-p,
unbalanced, Sync
negative, load impedance
75 ohms
SPEAKER: accepts impedance of 6 to
16 ohms
SUBWOOFER OUT (HCD-GX555/RG575/
RG475 only): accepts impedance of 6 to
16 ohms
CD player section
System Compact disc and digital
audio system
Laser Diode Properties Emission duration:
continuous
Laser Output*:
Less than 44.6µW
*Thisoutput is the value measurement at a distance of
200mm from the objective lens surface on the
Optical Pick-up Block with 7mm aperture.
Frequency response 2 Hz – 20 kHz (±0.5 dB)
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 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model: 87.5 – 108.0 MHz
(100 kHz step)
Other models: 87.5 – 108.0 MHz
(50 kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Pan-American models: 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)
European, Russian and Saudi Arabian models:
531 – 1,602 kHz (with the
tuning interval set at
9kHz)
Other models: 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna
Intermediate frequency 450 kHz
General
Power requirements
North American model: 120 V AC, 60 Hz
European and Russian models:
230 V AC, 50/60 Hz
Australian model: 230 – 240 V AC, 50/60 Hz
Argentine model: 220 V AC, 50/60 Hz
Mexican model: 127 V AC, 60 Hz
Saudi Arabian model: 120 – 127, 220 or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Other models: 120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
USA model:
HCD-GX555: 285 watts
HCD-GX355: 210 watts
Canadian model:
HCD-GX555: 380 VA
HCD-GX355: 290 VA
European and Russian models:
HCD-RG475: 300 watts
0.25 watts (at the Power
Saving Mode)
HCD-RG270: 190 watts
0.25 watts (at the Power
Saving Mode)
Other models:
HCD-RG575: 300 watts
HCD-RG475: 300 watts
HCD-RG270: 210 watts
Dimensions (w/h/d) (excl. speakers)
Approx. 280 ×325
430 mm
Mass (excl. speakers)
North American models:
HCD-GX555: Approx. 10.5 kg
HCD-GX355: Approx. 10.0 kg
Canadian model:
HCD-GX555: Approx. 10.5 kg
HCD-GX355: Approx. 10.0 kg
European and Russian models:
HCD-RG475: Approx. 10.5 kg
HCD-RG270: Approx. 8.7 kg
Other models:
HCD-RG575: Approx. 10.5 kg
HCD-RG475: Approx. 10.5 kg
HCD-RG270: Approx. 10.0 kg
Design and specifications are subject to change
without notice.
HCD-RG270
DIN power output (rated): 80 + 80 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
100 + 100 watts (6 ohms at
1kHz, 10% THD)
Music power output (reference):
200 + 200 watts (6 ohms at
1kHz, 10% THD)

3
HCD-GX355/GX555/RG270/RG475/RG575
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 the 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.
CAUTION
Use of controls or adjustments or performance of procedures
otherthanthose specifiedhereinmay result in hazardousradiation
exposure.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40 ˚C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0ON 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 IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals,metal trim, “metallized” knobs, screws,
and all other exposed metal parts forAC leakage.
Check leakage as described below.
LEAKAGE TEST
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-operatedAC 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-operatedACvoltmeter.The “limit”indication
is 0.75V, 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 2VAC range are suitable. (See
Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
This appliance is classified as
a CLASS 1 LASER product.
This marking is located on the
rear exterior.

4
HCD-GX355/GX555/RG270/RG475/RG575
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 5
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 8
3-2. Case (Top) ....................................................................... 9
3-3. Door (CD)........................................................................ 9
3-4. Front Panel Section ......................................................... 10
3-5 Mechanical Deck (CWM43FF13)................................... 10
3-6. CD Mechanism Deck (CDM74KFS-F1BD81C (Except
MX model)/CDM74KFS-F1BD84 (MX model)) ........... 11
3-7. Back Panel Section .......................................................... 11
3-8. MAIN Board.................................................................... 12
3-9. BD Board/CD Board ....................................................... 12
3-10. DRIVER Board, SW Board............................................. 13
3-11. Optical Pick-up Block (KSM-215DCP).......................... 13
3-12. SENSOR Board ............................................................... 14
3-13. MOTOR (TB) Board ....................................................... 14
3-14. MOTOR (LD) Board ....................................................... 15
4. TEST MODE.............................................................. 16
5. ELECTRICAL ADJUSTMENT ............................ 20
6. DIAGRAMS
6-1. Block Diagram – CD SERVO Section – ........................ 21
6-2. Block Diagram – AUDIO/VIDEO Section – ................. 22
6-3. Block Diagram – AMP Section – ................................... 23
6-4. Block Diagram
– PANEL, POWER SUPPLY Section – .......................... 24
6-5. Printed Wiring Board
– CD Board – (Except MX model) ................................. 26
6-6. Schematic Diagram
– CD Board – (Except MX model) ................................. 27
6-7. Printed Wiring Board – BD Board – (MX model) ......... 28
6-8. Schematic Diagram – BD Board – (MX model)............ 29
6-9. Printed Wiring Boards – CHANGER Section –............. 30
6-10. Schemtic Diagram – CHANGER Setion –..................... 31
6-11. Printed Wiring Board – MAIN Board – ......................... 32
6-12. Schematic Diagram – MAIN Board (1/3) – ................... 33
6-13. Schematic Diagram – MAIN Board (2/3) – ................... 34
6-14. Schematic Diagram – MAIN Board (3/3) – ................... 35
6-15. Printed Wiring Board – POWER Board – ...................... 36
6-16. Schematic Diagram –POWER Board –.......................... 37
6-17. Printed Wiring Board – SUB WOOFER Board –
(GX555/RG475/RG575 only) ......................................... 38
6-18. Schematic Diagram – SUB WOOFER Board –
(GX555/RG475/RG575 only) ......................................... 39
6-19. Printed Wiring Boards
– AUDIO, MIC, HEADPHONE Boards – ...................... 40
6-20. Schematic Diagram
– AUDIO, MIC, HEADPHONE Boards – ...................... 41
6-21. Printed Wiring Boards – CD-G Section –
(MX model only)............................................................. 42
6-22. Schematic Diagram – CD-G Section –
(MX model only)............................................................. 43
6-23. Printed Wiring Board – PANEL Section (1/2) ............... 44
6-24. Printed Wiring Board – PANEL Section (2/2) ............... 45
6-25. Schematic Diagram – PANEL Section (1/2) .................. 46
6-26. Schematic Diagram – PANEL Section (2/2) .................. 47
6-27. Printed Wiring Boards – TRANS Section – ................... 48
6-28. Schematic Diagram – TRANS Section – ....................... 49
7. EXPLODED VIEWS
7-1. Overall Section ................................................................ 66
7-2. Back Panel Section .......................................................... 67
7-3. Front Panel Section ......................................................... 68
7-4. Key Section ..................................................................... 69
7-5. Chassis Section................................................................ 70
7-6. Transformer Section ........................................................ 71
7-7. CD Mechanism Deck Section-1
(CDM74KFS-F1BD81C) (Except MX model)/
(CDM74KFS-F1BD84) (MX model).............................. 72
7-8. CD Mechanism Deck Section-2
(CDM74KFS-F1BD81C) (Except MX model)/
(CDM74KFS-F1BD84) (MX model).............................. 73
8. ELECTRICAL PARTS LIST................................ 74
•Abbreviation
MX: Mexican model
Ver. 1.1

5
HCD-GX355/GX555/RG270/RG475/RG575
SECTION 1
SERVICING NOTES
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the“S curvecheck” in “CDsection adjustment” andcheck
that the S curve waveforms is output three times.
•MODEL IDENTIFICATION
– Back Panel –
Label indication Model
2-348-857-01 CA GX355: CND
2-560-970-01 U GX555: US
2-560-971-01 CA GX555: CND
2-560-972-01 CED RG475: AEP, UK, EE, RU
2-560-974-01 E3 RG475: E3
2-560-975-01 AU RG475: AUS
2-560-979-01 U GX355: US
2-560-980-01 CED RG270: AEP, UK, EE, RU
2-560-982-01 E3 RG270: E3
2-560-982-11 E2 RG270: E2
2-560-983-01 EA3 EA
2-560-984-01 SP2 RG475: SP
2-560-985-01 AU RG270: AUS
2-560-986-01 E51 RG270: E51
2-560-987-01 MX4 RG270: MX
2-560-987-11 MX4
2-560-988-01 AR RG270: AR
2-560-995-01 SP2 RG575: SP
2-580-005-01 E2 RG575: E2
2-580-005-11 E3
2-580-007-01 E51 RG575: E51
2-580-008-01 MX4 RG575: MX
2-580-008-11 MX4
2-580-009-01 AR RG575: AR
•Abbreviation
AR : Argentine model
AUS:Australian model
CND : Canadian model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
EE : East European model
MX : Mexican model
RU : Russian model
SP : Singapore model
Model number labe
l
Ver. 1.1

6
HCD-GX355/GX555/RG270/RG475/RG575
SECTION 2
GENERAL This section is extracted from
instruction manual.
•Location of Controls
Main unit
ALBUM +/– qs
AUDIO IN wl
AUDIO IN jack wf
CD es
CD SYNC wj
Deck A wg
Deck B qk
DISC 1 – 3 qa
DISC SKIP/EX-CHANGE qd
Disc tray 0
DISPLAY 3
Display window 5
ECHO LEVEL1) wa
EFFECT ON/OFF 4
ENTER 4
EQ BAND qs
GROOVE 4
ILLUMINATION 2
MIC jack2) wd
MIC LEVEL2) ws
MULTIPLEX1) 6
Operation Dial
(– EQ +/l L/
– TUNING +) qj
P FILE 4
PHONES jack w;
PLAY MODE 8
Power illuminator qg
PRESET EQ 4
REC PAUSE/START wl
Remote sensor 7
SUBWOOFER ON/OFF3) 9
SURROUND 4
TAP E A/B e;
TUNER/BAND ea
TUNING MODE 8
VOLUME control ql
?/1 (power) 1
X(pause) qs
x(stop) qs
M(fast forward) qs
N(play) qs
m(rewind) qs
Z(eject) qf
PUSH Z(deck B) (eject) qh
ZPUSH (deck A) (eject) wh
1) Mexican model only
2) Latin American model only
(Mexican model comes with
2microphone jacks)
3) HCD-GX555/RG575/
RG475 only
ALPHABETICAL ORDER
A – O P – Z
BUTTON DESCRIPTIO
j
s
S
H
l
L
AB
wd
123456789q
;
qf
qa
qs
qd
w;
ql
wa
ws
qg
qh
qk
wf
wg
wj
wh
wk
ea
e;
es
wl
qj
NS

7
HCD-GX355/GX555/RG270/RG475/RG575
Remote control
ALBUM + qa
ALBUM – qd
CD qk
CLEAR qg
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
DISC SKIP q;
DISPLAY wa
ENTER 9
EQ qf
FM MODE 4
FUNCTION 6
PLAY MODE w;
REPEAT 4
SLEEP ws
TAPE qj
TUNER BAND 5
TUNER MEMORY ql
TUNING MODE w;
VOLUME +/– qs
?/1 (power) 1
m/M (rewind/fast forward)
7
N(play) 8
X(pause) 8
x(stop) 8
+/– (tuning) qh
./> (go back/go forward)
qh
ALPHABETICAL ORDER
A – E F – Z
BUTTON DESCRIPT
IONS
4
5
6
7
8
9
q;
ws 1
qd
qg
qf
wa
w;
ql
qk
qj
qh
qa
qs
3
2

HCD-GX355/GX555/RG270/RG475/RG575
8
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. CASE (TOP)
(Page 9)
3-3. DOOR (CD)
(Page 9)
3-8. MAIN BOARD
(Page 12) 3-13. MOTOR (TB) BOARD (Page 14)
3-14. MOTOR (LD) BOARD
(Page 15)
3-10. DRIVER BOARD,
SW BOARD
(Page 13)
3-4. FRONT PANEL SECTION
(Page 10)
3-5. MECHANICAL DECK
(CWM43FF13)
(Page 10)
3-6. CD MECHANISM DECK
(CDM74KFS-F1BD81C
(EXCEPT MX MODEL)/
CDM74KFS-F1BD84
(MX MODEL))
(Page 11)
3-9. BD BOARD/
CD BOARD
(Page 12)
3-11. OPTICAL PICK-UP BLOCK
(KSM-215DCP)
(Page 13)
3-12. SENSOR BOARD
(Page 14)
3-7. BACK PANEL SECTION
(Page 11)
Ver. 1.1

HCD-GX355/GX555/RG270/RG475/RG575
9
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (TOP)
1 three screws
(case 3 TP2)
2 two screws (B3)
7 two screws
3 case (side-R)
4 three screws
(case 3 TP2)
6 case (side-R)
5 two screws (B3)
0 case (top)
8
8
9
9
3-3. DOOR (CD)
2 Pull-out the disc tray.
3 two claws
4 door (CD)
1 Turn the pulley in the direction of the arrow.
Front panel side
CD mechanism deck
–BOTTOM VIEW–

HCD-GX355/GX555/RG270/RG475/RG575
10
3-4. FRONT PANEL SECTION
3-5. MECHANICAL DECK (CWM43FF13)
(E2, E51, AR, MX)
1 connector
(CN061)
5 connector
(CN066)
8 screw (B3)
7 screw
(B3)
6 four screws (B3)
9 front panel section
4 connector (CN065)
• Abbreviation
AR : Argentina model
E2 : 120V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
3 connector (CN201)
2 connector
(CN203)
(MX)
4 two screws
(+BVTP 2.6
× 8)
6 screw
(+BVTP 2.6 × 8) (except MX
)
(+BVTP 2.6 × 10) (MX)
5 two screws
(+BVTP 2.6
× 8) (except MX)
(+BVTP 2.6
× 10) (MX)
8 mechanical deck
(CWM43FF13)
7 cover (TCM)
1 screw
(+BVTP 2.6
× 8) (except MX)
(+BVTP 2.6 × 10) (MX)
2 harness
3 coating clip
(except MX)
• Abbreviation
MX : Mexican model

HCD-GX355/GX555/RG270/RG475/RG575
11
1 connector
(CN906)
2 connector
(CN903)
3 connector
(CN901)
5 connector
(CN041)
6 two screws (B3)
7 two screws (B3)
8 back panel section
4 wire (flat type) (15 core)
(CN381)
3-6. CD MECHANISM DECK
(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL))
3-7. BACK PANEL SECTION
(MX)
(MX)
1 three screws (B3)
3 wire (flat type) (13 core) (CN701)
6 connector
(CN1004)
7 CD mechanism deck
(CDM74KFS-F1BD81C (except MX)/CDM74KFS-F1BD84 (MX))
4 wire (flat type) (27 core) (CN201) (Except MX)
wire (flat type) (31 core) (CN201) (MX)
5 wire (flat type)
(13 core) (CN331)
2
• Abbreviation
MX : Mexican model
Ver. 1.1

HCD-GX355/GX555/RG270/RG475/RG575
12
3-8. MAIN BOARD
3-9. BD BOARD/CD BOARD
1 connector
(CN907)
2 connector
(CN905)
3 two screws (B3)
5 MAIN board
4 connector
(CN441)
MAIN board
5 BD board (MX)/
CD board (except MX)
2 screw
(+BVTP 2.6)
4 Remove soldering from the four points.
1 wire (flat type) (16 core) (CN101
)
3 gap tube
• Abbreviation
MX : Mexican model

HCD-GX355/GX555/RG270/RG475/RG575
13
3-11. OPTICAL PICK-UP BLOCK (KSM-215DCP)
3-10. DRIVER BOARD, SW BOARD
3 connector
4p (CN703)
4 DRIVER board
6 SW board
2 wire (flat type) 5p (CN702)
1 two screws
(+BTTP (M2.6))
5 screw
(+BTTP (M2.6))
4 two coil springs
(insulator)
7 two coil springs
(insulator)
5 two insulators
8 two insulators
0 s crew (+BVTP 2.6 × 8 )
qa gap tube
6 two floating screws
(+PTPWH M2.6)
2 h older (213) ASSY
qs Remove the four solders of motor.
qd wire (flat type)
(CN101)
qf B D board (MX)/
C D board (except MX)
qg optical pick-up block
(KSM-215DCP)
1 floating screw
(+PTPWH M2.6)
3 two floating screws
(+PTPWH M2.6)
9
• Abbreviation
MX : Mexican model
Ver. 1.1

HCD-GX355/GX555/RG270/RG475/RG575
14
2 t ray
3 b elt (table)
5 p ulley (table)
8 s crew
(+BTTP (M2.6))
0 SENSOR board
7 g ear (geneva)
9 connector
(
CN731)
1 floating screw
(+PTPWH M2.6)
6 floating screw
(+PTPWH M2.6)
4 floating screw
(+PTPWH M2.6)
6 Remove the two solderings of motor.
7 MOTOR (TB) board
5 t able motor assy (M741)
5 two screws
(+BTTP (M2.6))
4
3
wire (flat type) 5 core (CN742)
1 stopper
2 stopper
3-12. SENSOR BOARD
3-13. MOTOR (TB) BOARD

HCD-GX355/GX555/RG270/RG475/RG575
15
4 Remove the two solderings of motor.
3 MOTOR (LD) board
1 b elt (loading)
5 l oading motor assy (M751)
2 two screws
(+BTTP (M2.6))
3-14. MOTOR (LD) BOARD

16
HCD-GX355/GX555/RG270/RG475/RG575
SECTION 4
TEST MODE
MC COLD RESET
The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning the
set to the customer.
Procedure:
1. Press three buttons of x, [ILLUMINATION] and [DISC 1]
simultane-ously.
2. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
AM TUNING INTERVAL CHANGE-OVER
(Except AEP, UK, East European, Russian models)
A step of AM tuning interval can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [TUNER/BAND] button to select “AM”.
3. Press the I/1button to turn the power off.
4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1
simultaneously.
5. Themessage “AM9K STEP” or “AM 10K STEP” is displayed
on the fluorescent indicator tube, and thus the channel step is
changed over.
CD SHIP (LOCK) MODE
This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press two buttons of [CD] and [POWER] simultaneously.
4. Themessage “LOCK” isdisplayed on the fluorescentindicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESET
This mode is used to perform CD chip (lock) mode and cold reset
simultaneously.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Pressthree buttonsof x,[CD] and [DISPLAY] simultaneously.
4. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
CD TRAY LOCK MODE
This mode is used to unable to take sample disc out of tray in the
shop.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Load a disc and press two buttons of xand Zfor 5 seconds.
4. The message “LOCKED” is displayed on the fluorescent
indicator tube and the CD tray is locked. (Even if pressing
the Zbutton, the message “LOCKED” is displayed on the
fluorescent indicator tube and the CD tray is locked)
5. To release this mode, press two buttons of xand Zfor 5
seconds.
6. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the CD tray is unlocked.
AMP TEST MODE
This mode is used to display the parameter of amplifier IC and
display the VACS status.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, [ILLUMINATION] and [PRESET EQ]
simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplifier adjustment mode is displayed on
the fluorescent indicator tube.
4. Press the [DISPLAY] button to changed over between VACS
status display mode and the amplifier IC parameter display
mode.
5. In this mode, press the [GROOVE] button to changed over
DBFB on/off, and “DBFB ON” or “DBFB OFF” is displayed
on the fluorescent indicator tube.
6. In this mode, press the [SURROUND] button to changed over
surround on/off, and “SURROUND ON” or “SURROUND
OFF” is displayed on the fluorescent indicator tube.
7. In this mode, press the [EQ BAND] button to enter the equalizer
adjustment mode.
In the equalizer adjustment mode, press the [EQ BAND] button
to change over the adjustment band as LOW/MID/HIGH.And
turn the
[ --- EQ + ]Ll
knob to adjust the equalizer level of
each bands.
8. To releasethe amplifierIC parameter displaymodeor equalizer
adjustment mode, press the I/1button to the power off.

17
HCD-GX355/GX555/RG270/RG475/RG575
AGING MODE
This mode can be used for operation check of CD section and tape
deck section.
CD section and tape deck section work in parallel.
If an error occurred:
Theaging operation stops onlyanerror occurred sections anddisplay
then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Load three discs and insert two tape to the deck A and B.
4. Pressthree buttonsof x, [ILLUMINATION] and[DISC SKIP/EX-
CHANGE] simultaneously.
5. Aging operations of CD and tape are started at the same time.
6. To release this mode, press the I/1button to turn the power
off or press the function buttons to change the function.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“TAPE AAG-1 or TAPE BAG-2”
Shut off
FWD play the tape A
“TAPE AAG-3”
2 minutes
Rewind the tape A
“TAPE AAG-6”
Shut off
FWD play the tape B
“TAPE BAG-3”
2 minutes
Rewind the tape B
“TAPE BAG-6”
Shut off
Note: “TAPE *AG-*” is display of each step.
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs
and buttons.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, [ILLUMINATION] and [GROOVE]
simultaneously.
3. Fluorescent indicator tube and LEDs are all turned on.
4. Presstwobuttonsof [ALBUM ---] and [ENTER] simultaneously,
mode is changed over.
5. In the key check mode, press each key, the defined key number
of every each key list is displayed on the fluorescent indicator
tube.
6. In the key count check mode, “KEYCNT 0” is displayed on
the fluorescent indicator tube. Each time a key is pressed, “K”
value increases. However, once a key is pressed, it is no longer
taken into account.
7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message
“H_P OFF” is displayed on the fluorescent indicator tube.
8. In the volume check mode, “VOLUME FLAT” is displayed
on the fluorescent indicator tube. Turn the [MASTER
VOLUME] knob clockwise, the message “VOLUME UP”
is displayed on the fluorescent indicator tube momentarily
and turn the [MASTER VOLUME] knob counterclockwise,
the message “VOLUME DOWN” is displayed on the
fluorescent indicator tube momentarily.

18
HCD-GX355/GX555/RG270/RG475/RG575
MC TEST MODE
This mode is used to check operations of microprocessor.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, [ILLUMINATION] and [DISC 3]
simultane-ously.
3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.
4. Turn the
[ --- EQ + ]Ll
knob clockwise, the message
“ALL EQ MAX” is displayed on the fluorescent indicator
tube momentarily and turn the
[ --- EQ + ]Ll
knob
counter-clockwise, the message “ALL EQ MIN” is
displayed on the fluorescent indicator tube momentarily.
5. Press the [PRESET EQ] button, the message “ALL EQ FLAT”
is displayed on the fluorescent indicator tube momentarily.
6. Turn the [MASTER VOLUME] knob clockwise, the message
“VOLUME MAX” is displayed on the fluorescent indicator
tube momentarily and turn the [MASTER VOLUME] knob
counterclockwise, the message “VOLUME MIN” is displayed
on the fluorescent indicator tube momentarily.
7. Press the [GROOVE] button to changed overVACS on/off.
8. When the [CD SYNC] key is pressed with the test tape (AMS-
100,AMS-110A) in the deck, number of space between tunes
is counted, then ifAMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
9. Press the I/1button to release from this mode, then cold reset
is performed.
VERSION DISPLAY MODE
This mode is used to check the model, destination and software
version.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, [ILLUMINATION] and [DISC 2]
simultane-ously.
3. Whenthismode is activated, model and destinationisdisplayed
on the fluorescent indicator tube.
4. Press the [DISPLAY] button to changed over between software
version and year, month, day of the software creation display
mode and model and destination display mode.
5. To release this mode, press three buttons of x, [ILLUMI
NATION] and [DISC 2] simultaneously.
CD ERROR CODE DISPLAY MODE
This mode can be used for error code display of CD section.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] key to select “CD”.
3. Press three buttons of x, [CD] and [DISC 1] simultaneously.
4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.
5. Press the [GROOVE] button to changed over between optical
pick-up error code display mode and mechanism deck error
code mode.
6. Turn the
[ --- EQ + ]Ll
knob to change over display of error
history.
7. To release this mode, press the I/1button to turn the power
off.
1. Mechanism Deck Error Code Mode
When this mode is entered, mechanism deck error code is displayed
with the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The second digit from the left indicates:
(Error history number display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
00 No error
08 Table operation time-out (Table does not move to the target
position within the specified time)
16 In the chucking down operation, the operation was retried
by the maximum number of times but the operation could
not be completed
17 In the chucking up and down operation, the reverse
recovery processing was attempted but it could not be
recovered
18 In the chucking up operation, the operation was retried by
the maximum number of times but the operation could not
be completed
20 Loading operation time-out (Table does not move to the
target position within the specified time)
22 As the chuck was in the ex-open status at the initialization,
the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
Display Status
01 Open completion status
02 From open status, the movement to chucking down position
is under way
03 From chucking down position, the open operation is under
way
04 Chucking down completion status
10 The chucking down operation is under way
11 The chucking up operation is under way
12 Close completion status
13 From close status, the ex-open operation is under way
14 From ex-open status, the close operation is under way
18 Ex-pen completion status