HCD-GX470, HCD-GX570, MHC-GX470, MHC-GX570XM — Sony Audio Service Manual (repair manual)

Model
HCD-GX470 HCD-GX570 MHC-GX470 MHC-GX570XM
Pages
87
Size
6.25 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gx470-hcd-gx570-mhc-gx470-mhc-gx570xm.pdf
Date

View Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM Service Manual online

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
US Model
Canadian Model
Ver. 1.3  2008.09
SPECIFICATIONS
9-887-123-04
2008I05-1
© 2008.09
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
Photo: HCD-GX470
HCD-GX470 is the amplifier, CD player, tape
deck and tuner section in MHC-GX470.
HCD-GX570 is the amplifier, CD player, tape
deck and tuner section in MHC-GX570.
Main unit
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC 
DISTORTION: (The United States model only)
With 6 ohm loads, both channels driven, from 
120 
 10,000 Hz; rated 125 watts per channel 
minimum RMS power, with no more than 10% 
total harmonic distortion from 250 milliwatts to 
rated output.
Amplifier section
GX470
GX570
Front speaker
Continuous RMS power output 
(reference): 125 + 125 watts (6 ohms at 
1 kHz, 10% THD)
Total harmonic distortion: less than 0.07% 
(6 ohms at 1 kHz, 80 W)
Subwoofer
Continuous RMS power output 
(reference): 150 watts (6 ohms at 80 Hz, 
10% THD)
Total harmonic distortion: less than 0.07% 
(6 ohms at 80 Hz, 90 W)
Front speaker:
Continuous RMS power output (reference): 
145 + 145 W (6 ohms at 1 kHz, 10% THD)
Total harmonic distortion: less than 0.07% 
(6 ohms at 1 kHz, 80 W)
Subwoofer:
Continuous RMS power output (reference): 
170 W (6 ohms at 80 Hz, 10% THD)
Total harmonic distortion: less than 0.07% 
(6 ohms at 80 Hz, 90 W)
Inputs
AUDIO IN (stereo mini jack): voltage 250 mV, 
impedance 47 kilohms
Outputs
PHONES (stereo mini jack): 
accepts headphones of 8 ohms or more
SPEAKER: accepts impedance of 6 to 16 ohms
SUBWOOFER OUT: 
accepts impedance of 6 to 16 ohms
Inputs:
AUDIO IN (stereo mini jack): voltage 
250 mV, impedance 47 kilohms
Outputs:
PHONES (stereo mini jack): accepts 
headphones of 8 ohms or more
SPEAKER: accepts impedance of 6 to 
16 ohms
SUBWOOFER OUT: 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 44.6
µ
W
*This output 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: 20 Hz 
 20 kHz
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
– Continued on next page –
Model Name Using Similar Mechanism
HCD-GX555
CD
CD Mechanism Type
CDM74KF-K6BD83S
Section
Base Unit Name
BU-K6BD83S-WOD
Optical Pick-up Block Name
KSM-213DCP
TAPE
Model Name Using Similar Mechanism
NEW
Section
Tape Transport Mechanism Type
CWN42FF609
HCD-GX470/GX570
2
HCD-GX470/GX570
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.
General
Power requirements
AC 120 V, 60 Hz 
Power consumption
USA model:
GX470: 240 watts
GX570: 270 watts
GX470: Approx. 280 
×
 328 
×
 412.3 mm
GX570: Approx. 280 
×
 348 
×
 412.3 mm
Canadian model:
GX470: 320 VA
GX570: 360 VA
Dimensions (w/h/d) (excl. speakers): 
Mass (excl. speakers): Approx. 9.4 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 (100 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
530 
 1,710 kHz (with 10 kHz tuning interval)  
531 
 1,710 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna 
terminal
Intermediate frequency: 450 kHz
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0
  SUR
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-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.
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 for AC 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-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 2 V AC range are suitable.  (See
Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
3
HCD-GX470/GX570
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
4
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
9
3-2.
Case (Side-L), Case (Side-R) .......................................... 10
3-3.
Case (Top) ....................................................................... 10
3-4.
Lid (CD) .......................................................................... 11
3-5
CD Mechanism Deck (CDM74KF-K6BD83S) .............. 11
3-6.
Front Panel Block ............................................................ 12
3-7.
Mecha Deck (CWN42FF609) ......................................... 12
3-8.
Back Panel Section .......................................................... 13
3-9.
MAIN Board .................................................................... 13
3-10. CD Board ......................................................................... 14
3-11. DRIVE Board, SW Board ............................................... 14
3-12. Optical Pick-up Block ..................................................... 15
3-13. SENSOR Board ............................................................... 15
3-14. MOTOR (TB) Board ....................................................... 16
3-15. MOTOR (LD) Board ....................................................... 16
4.
TEST  MODE
.............................................................. 17
5.
MECHANICAL  ADJUSTMENTS
....................... 20
6.
ELECTRICAL  ADJUSTMENTS
......................... 21
7.
DIAGRAMS
7-1.
Block Diagram – CD SERVO Section – ......................... 23
7-2.
Block Diagram – MAIN Section – .................................. 24
7-3.
Block Diagram – AMP Section – .................................... 25
7-4.
Block Diagram
– PANEL, POWER SUPPLY Section – .......................... 26
7-5.
Printed Wiring Board – CD Board – ............................... 28
7-6.
Schematic Diagram – CD Board – .................................. 29
7-7.
Printed Wiring Boards – CHANGER Section – .............. 30
7-8.
Schematic Diagram – CHANGER Section – .................. 31
7-9.
Printed Wiring Board – DECK Board – .......................... 32
7-10. Schematic Diagram – DECK Board – ............................. 33
7-11. Printed Wiring Board – MAIN Board – .......................... 34
7-12. Schematic Diagram – MAIN Board (1/3) – .................... 35
7-13. Schematic Diagram – MAIN Board (2/3) – .................... 36
7-14. Schematic Diagram – MAIN Board (3/3) – .................... 37
7-15. Printed Wiring Board – XM Board (GX570) – ............... 38
7-16. Schematic Diagram – XM Board (GX570) – .................. 39
7-17. Printed Wiring Board – MIC. AUX. HP Board – ............ 40
7-18. Schematic Diagram – MIC. AUX. HP Board – ............... 41
7-19. Printed Wiring Board – POWER Board – ....................... 42
7-20. Schematic Diagram – POWER Board – .......................... 43
7-21. Printed Wiring Boards – SUB WOOFER Section – ........ 44
7-22. Schematic Diagram – SUB WOOFER Section – ............ 45
7-23. Printed Wiring Board – PANEL Board – ........................ 46
7-24. Printed Wiring Boards – KEY Section – ......................... 47
7-25. Schematic Diagram – PANEL Section – ......................... 48
7-26. Printed Wiring Board – TRANSFORMER Board – ....... 49
7-27. Schematic Diagram – TRANSFORMER Board – .......... 50
8.
EXPLODED  VIEWS
8-1.
Case Section .................................................................... 63
8-2.
PANEL Board Section ..................................................... 64
8-3.
Lid (Top) Section ............................................................. 65
8-4.
Front Panel Section ......................................................... 66
8-5.
MAIN Board Section ....................................................... 67
8-6.
POWER Board, SUB WOOFER Board Section ............. 68
8-7.
Chassis Section ................................................................ 69
8-8.
CD Mechanism Deck Section-1
(CDM74KF-K6BD83S) .................................................. 70
8-9.
CD Mechanism Deck Section-2
(CDM74KF-K6BD83S) .................................................. 71
9.
ELECTRICAL  PARTS  LIST
................................ 72
4
HCD-GX470/GX570
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.
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.
RELEASING  THE  ANTITHEFT  LOCK
The disc table lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
1. Press the  
I
/1
  button to turn the power on.
2. While pressing the
s
button, press the 
A
button until
“UNLOCKED” displayed on the fluorescent indicator tube
(around 5 seconds).
Note:
When “LOCKED” is displayed, the antitheft lock is not released by
turning power on/off with the
I/
1
button.
MODEL  IDENTIFICATION
– Back Panel –
Label indication
Model
2-664-530-0[]
GX570: US
2-664-531-0[]
GX570: Canadian
2-664-532-0[]
GX470: US
2-664-533-0[]
GX470: Canadian
Model number label
5
HCD-GX470/GX570
SECTION  2
GENERAL
This section is extracted from
instruction manual.
– GX470 –
This manual mainly explains operations using 
the remote, but the same operations can also be 
performed using the buttons on the unit having 
the same or similar names.
1
?/1
 
(power) button
Press to turn on the system.
STANDBY indicator
Lights up when the system is turned off.
CD button
Press to select the CD function.
 
TUNER/BAND button
Press to select the TUNER function. Press 
to select FM or AM reception mode.
 
Unit: TAPE A/B button
Remote: TAPE button
Press to select the TAPE function. Press to 
select TAPE A or TAPE B.
 
AUDIO IN button
Press to select the AUDIO IN function.
 
FUNCTION button
Press to select the function.
SUBWOOFER indicator
Lights up when the subwoofer is turned 
on.
SUBWOOFER button
Press to turn on and off the subwoofer.
Guide to parts and 
controls
Unit
Remote
 
DISPLAY button
Press to change the information on the 
display.
7
 
PLAY MODE/TUNING MODE 
button
Press to select the play mode of a CD, 
MP3 or tape. Press to select the tuning 
mode.
Buttons for synchro recording or 
manual recording
REC PAUSE/START button, 
CD SYNC button
Press to record on a tape.
PUSH 
A
 utton
Press to insert or eject a tape.
q; 
Playback buttons  
Unit: 
HS
 (play/pause) button 
Remote: 
N
 (play) button, 
X
 (pause) button
Press to start or pause playback.
 
(stop) button
Press to stop playback.
.
/
>
 (go back/go forward) 
button
Press to select a track or file.
 
Unit: TUNING +/– button 
 
Remote: +/– (tuning) button 
 Press to tune in the desired station.
 
(page 11)
Press to select a folder on an MP3 disc.
 
m
/
M
 
(rewind/fast forward) 
button
Press to find a point in a track or file.
 
MULTI JOG dial (
.
/
>
 
(go 
back/go forward), +/– (tuning)) 
Turn to select a track or file. Turn to 
tune in the desired station. (Same as the 
./>, +/
− buttons on the remote) 
qa 
PHONES jack
Connect the headphones.
qs 
AUDIO IN jack
Connect to an audio component.
qf 
Unit: VOLUME control
Turn to adjust the volume.
Remote: VOLUME +/– button 
Press to adjust the volume.
qg 
EQ BAND button
Press to select the frequency band.
qh 
ENTER button
Press to enter the settings.
qj 
Sound buttons
Unit: GROOVE button, 
SURROUND button 
Remote: EQ button
Press to select the sound.
qk 
A
 
(open/close) button
Press to insert and eject a disc.
ql 
DISC 1 – 3 button
Press to select a disc. Press to switch to 
the CD function from other function.
 
Unit: DISC SKIP/EX-CHANGE 
button
Press to select a disc. Press to exchange 
a disc while playing.
 
Remote: DISC SKIP button 
Press to select a disc.
w; 
Remote sensor
wa 
CLOCK/TIMER SELECT button 
CLOCK/TIMER SET button 
Press to set the clock and the timers.
ws 
REPEAT/FM MODE button
Press to listen to a disc, a single track 
or file repeatedly. Press to select the FM 
reception mode (monaural or stereo).
wd 
Battery compartment lid 
wf 
CLEAR button
Press to delete a pre-programmed track.
wg 
TUNER MEMORY button 
Press to preset the radio station.
wh 
PLAY MODE/TUNING MODE 
button
Press to select the play mode of a CD, 
MP3 or tape.
Press to select the tuning mode.
wj 
SLEEP button
Press to set the Sleep Timer.
 +/– (select folder) button 

Download Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM Service Manual (Repair Manual)

Here you can view online or download Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM Audio. Information contained in Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).