HCD-RG295, HCD-RG495, HCD-RG595, MHC-RG295, MHC-RG495, MHC-RG595 - Sony Audio Service Manual (repair manual)

Photo: HCD-RG495

– Continued on next page –

2008I05-1
© 2008.09

AEP Model

E Model

HCD-RG295/RG495/RG595

UK Model

HCD-RG295/RG595

Australian Model

HCD-RG295/RG495

• HCD-RG295 is the amplifier, CD player, tape

deck and tuner section in MHC-RG295.

• HCD-RG495 is the amplifier, CD player, tape

deck and tuner section in MHC-RG495.

• HCD-RG595 is the amplifier, CD player, tape

deck and tuner section in MHC-RG595.

Model Name Using Similar Mechanism

HCD-RG490/RG590

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

HCD-RG490/RG590

Section

Tape Transport Mechanism Type

CWN42FF609

European model:
HCD-RG595
Front speaker

Power output (rated): 110 W + 110 W 
(at 6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 180 W + 
180 W (per channel at 6 

Ω, 1 kHz, 10% 

THD)

Subwoofer

RMS output power (reference): 180 W 
(at 6 

Ω, 80 Hz, 10% THD)

HCD-RG495
Front speaker

Power output (rated): 95 W + 95 W (at 
6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 155 W + 
155 W (per channel at 6 

Ω, 1 kHz, 10% 

THD)

Subwoofer

RMS output power (reference): 155 W 
(at 6 

Ω, 80 Hz, 10% THD)

HCD-RG295

Power output (rated): 95 W + 95 W (at 
6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 155 W + 
155 W (per channel at 6 

Ω, 1 kHz, 10% 

THD)

Other models:

HCD-RG495

HCD-RG595

The following are measured at AC 120, 127, 
220, 240 V 50/60 Hz
Front speaker

Power output (rated): 95 W + 95 W (at 
6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 155 W + 
155 W (per channel at 6 

Ω, 1 kHz, 10% 

THD)

Subwoofer

RMS output power (reference): 155 W 
(at 6 

Ω, 80 Hz, 10% THD)

HCD-RG295
The following are measured at AC 120, 127, 
220, 240 V 50/60 Hz

Power output (rated): 95 W + 95 W (at 
6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 155 W + 
155 W (per channel at 6 

Ω, 1 kHz, 10% 

THD)

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 (HCD-RG595/
RG495 only): accepts impedance of 6 to 
16 ohms

The following are measured at AC 120, 127, 
220 or 240 V, 50/60 Hz
Front speaker:

Power output (rated): 110 W + 110 W 
(at 6 

Ω, 1 kHz, 1% THD)

RMS output power (reference): 180 W + 180 W 
(per channel at 6 

Ω, 1 kHz, 10% THD)

Subwoofer:

RMS output power (reference): 180 W 
(at 6 

Ω, 80 Hz, 10% THD)

2

•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be

damaged by heat.

•

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.

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

 0

0

is classified 
as a CLASS 1 
LASER product. 
This marking is 
located on the rear 
exterior.

This appliance 

FM stereo, FM/AM superheterodyne tuner

FM tuner section:

Tuning range:
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
European and Saudi Arabian models: 
531 

−

 1,602 kHz (with 9 kHz tuning interval)

Other models:  
530 

−

 1,710 kHz (with 10 kHz tuning interval) 

531 

−

 1,602 kHz (with 9 kHz tuning interval)

Antenna: AM loop antenna, external antenna 
terminal
Intermediate frequency: 450 kHz

Power requirements

European model: AC 230 V, 50/60 Hz
Australian model: AC 230 

−

 240 V, 

50/60 Hz
Saudi Arabian model: AC 120 

−

 127, 

220  or 230 

−

 240 V, 50/60 Hz, 

Adjustable with voltage selector
Other models: AC 120, 220 or 230 

−

 240 V, 

50/60 Hz, Adjustable with voltage selector

Power consumption

European model:
HCD-RG595: 205 watts
0.5 W (in Power Saving Mode)
HCD-RG495: 245 watts
0.5 W (in Power Saving Mode)
HCD-RG295: 185 watts
0.5 W (in Power Saving Mode)
Other models:

HCD-RG495: 245 watts
0.5 W (in Power Saving Mode)
HCD-RG295: 200 watts
0.5 W (in Power Saving Mode)

Dimensions (w/h/d) (excl. speakers): 

Except HCD-RG595: E, Saudi Arabian models:
Approx. 280 

×

 328 

×

 412.3 mm

HCD-RG595: E, Saudi Arabian models: 
Approx. 280 

×

 348 

×

 412.3 mm

Mass (excl. speakers)

European model:
HCD-RG595: Approx. 9.5 kg
HCD-RG495: Approx. 9.5 kg
HCD-RG295: Approx. 9.3 kg
Other models:

HCD-RG495: Approx. 9.5 kg
HCD-RG295: Approx. 9.3 kg

Design and specifications are subject to change 
without notice.

HCD-RG595: 205 watts

HCD-RG595: Approx. 9.7 kg

Recording system: 4-track 2-channel, stereo
Frequency response: 50 

−

 13,000 Hz (

±

3 dB), 

using Sony TYPE I cassettes

System: Compact disc and digital audio system
Laser: Semiconductor laser (

λ

=790 nm)

Emission duration: continuous
Frequency response: 20 Hz 

−

 20 kHz

Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB

3

...............................................

4

...................................................................

5

3-1.

Disassembly Flow ...........................................................

8

3-2.

Case (Side-L), Case (Side-R) ..........................................

9

3-3.

Case (Top) .......................................................................

9

3-4.

LID (CD) ......................................................................... 10

3-5

CD Mechanism Deck (CDM74KF-K6BD83S) .............. 10

3-6.

Front Panel Block ............................................................ 11

3-7.

Mecha Deck (CWN42FF609) ......................................... 11

3-8.

Back Panel Block ............................................................ 12

3-9.

MAIN Board .................................................................... 12

3-10. CD Board ......................................................................... 13
3-11. DRIVER Board, SW Board ............................................. 13
3-12. Optical Pick-up Block (KSM-213DCP) .......................... 14
3-13. SENSOR Board ............................................................... 14
3-14. MOTOR (TB) Board ....................................................... 15
3-15. MOTOR (LD) Board ....................................................... 15

.............................................................. 16

....................... 19

......................... 20

7-1.

Block Diagram – CD SERVO Section – ......................... 23

7-2.

Block Diagram – MAIN Section – .................................. 24

7-3.

Block Diagram – AMP/VIDEO 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 Section (1/3) – .................. 35
7-13. Schematic Diagram – MAIN Section (2/3) – .................. 36
7-14. Schematic Diagram – MAIN Section (3/3) – .................. 37
7-15. Printed Wiring Board – MIC. AUX. HP Board – ............ 38
7-16. Schematic Diagram – PANEL/KEY Section – ............... 39
7-17. Printed Wiring Board – PANEL Board – ........................ 40
7-18. Printed Wiring Boards – KEY Section – ......................... 41
7-19. Printed Wiring Board

– POWER Board (RG295/RG495) – .............................. 42

7-20. Schematic Diagram

– POWER Board (RG295/RG495) – .............................. 43

7-21. Printed Wiring Board – POWER Board (RG595) – ........ 44
7-22. Schematic Diagram – POWER Board (RG595) – .......... 45
7-23. Printed Wiring Boards

– SUB WOOFER Section (RG495/RG595) – ................. 46

7-24. Schematic Diagram

– SUB WOOFER Section (RG495/RG595) – ................. 47

7-25. Printed Wiring Board

– TRANSFORMER Board (RG295/RG495) – ............... 48

7-26. Schematic Diagram

– TRANSFORMER Board (RG295/RG495) – ............... 49

7-27. Printed Wiring Board

– TRANSFORMER Board (RG595) – ........................... 50

7-28. Schematic Diagram

– TRANSFORMER Board (RG595) – ........................... 51

8-1.

Case Section .................................................................... 60

8-2.

PANEL Board Section ..................................................... 61

8-3.

Lid (Top) Section ............................................................. 62

8-4.

Front Panel Section ......................................................... 63

8-5.

MAIN Board Section ....................................................... 64

8-6.

POWER Board, SUB WOOFER Board Section ............. 65

8-7.

Chassis Section ................................................................ 66

8-8.

CD Mechanism Deck Section
(CDM74KF-K6BD83S) .................................................. 67

8-9.

Optical Pick-up Section (KSM-213DCP) ....................... 68

................................ 69

4

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)

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.

1. Press the  

I/1

  button to turn the power on.

2. While pressing the

x

button, press the 

Z

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.

Label indication

Model

2-897-731-0[]

RG595: AEP, UK

2-897-733-0[]

RG595: E

2-897-734-0[]

RG595: EA

2-897-736-0[]

RG495: AEP

2-897-738-0[]

RG495: E

2-897-739-0[]

RG495: EA

2-897-740-0[]

RG495: AUS

2-897-741-0[]

RG295: AEP, UK

2-897-743-0[]

RG295: E

2-897-744-0[]

RG295: AUS

• Abbreviation

AUS

: Australian model

EA

: Saudi Arabia model

Model number label