HCD-GT220, HCD-GT440, HCD-GT660, MHC-GT220, MHC-GT440, MHC-GT660 — Sony Audio Service Manual (repair manual)

Model
HCD-GT220 HCD-GT440 HCD-GT660 MHC-GT220 MHC-GT440 MHC-GT660
Pages
94
Size
5.57 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gt220-hcd-gt440-hcd-gt660-mhc-gt220-mhc-gt440-.pdf
Date

View Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Service Manual online

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
HCD-GT220/GT440/GT660
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
9-889-415-02
2012B33-1
© 
2012.02
E Model
Ver. 1.1  2012.02
•  HCD-GT220 is the amplifer, USB, CD player, tape 
deck and tuner section in MHC-GT220.
•  HCD-GT440 is the amplifer, USB, CD player, tape 
deck and tuner section in MHC-GT440.
•  HCD-GT660 is the amplifer, USB, CD player, tape 
deck and tuner section in MHC-GT660.
Photo: HCD-GT660
CD 
Section
Model Name Using Similar Mechanism
HCD-GT22
CD Mechanism Type
CDM74KF-K6BD91UR-WOD
Base Unit Name
BU-K6BD91UR-WOD74
Optical Pick-up Block Name
KSM-213DCP
TAPE
Section
Model Name Using Similar Mechanism
HCD-GT22
Tape Transport Mechanism Type
CWN42FF609
• “WALKMAN” and “WALKMAN” 
logo are registered trademarks of Sony 
Corporation.
• MICROVAULT is a trademark of Sony 
Corporation.
• MPEG Layer-3 audio coding 
technology and patents licensed from 
HCD-GT660
240V 50/60Hz
Front speaker
Power output (rated): 110 W + 110 W 
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference): 
200 W + 200 W (per channel at 6 Ω, 
1 kHz, 10% THD)
Subwoofer
RMS output power (reference): 200 W 
(at 6 Ω, 80 Hz, 10% THD)
HCD-GT440
240V 50/60Hz
Front speaker
Power output (rated): 90 W + 90 W 
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference): 
160 W + 160 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-GT220
240V 50/60Hz
Power output (rated): 110 W + 110 W 
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference): 
205 W + 205 W (per channel at 6 Ω, 
1 kHz, 10% THD)
Inputs
AUDIO (phono jack): voltage 250 mV, 
impedance 47 kilohms
MIC (phone jack): sensitivity 1 mV, 
impedance 10 kilohms
 (USB) port: Type A
Outputs
PHONES (stereo mini jack): accepts 
headphones of 8 Ω or more
SPEAKER: accepts impedance of 6 to 16 Ω
SUB WOOFER OUT (MHC-GT660/GT440 
only): accepts impedance of 6 to 16 Ω
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3): 
32
   320 kbps, VBR
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3): 
32/44.1/48 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
CD player section
System: Compact disc and digital audio 
system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6μW
*
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 88 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:
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
530
   1,610 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
General
Power requirements
AC 120, 220 or 230
   240 V, 
50/60 Hz, Adjustable with voltage 
selector
Power consumption
HCD-GT660: 225 W
HCD-GT440: 250 W
HCD-GT220: 150 W
Dimensions (w/h/d) (excl. speakers)
HCD-GT660:
Approx. 280 × 365 ×425 mm
HCD-GT440/GT220:
Approx. 280 × 325 ×425 mm
Mass (excl. speakers)
HCD-GT660: 10.5 kg
HCD-GT440/GT220: 10.0 kg
change without notice.
HCD-GT220/GT440/GT660
2
NOTES  ON  CHIP  COMPONENT  REPLACEMENT
• 
Never reuse a disconnected chip component.
• 
Notice that the minus side of a tantalum capacitor may be dam-
aged 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.
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.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
This appliance is classifi ed as 
a CLASS 1 LASER product.
This marking is located on the 
rear exterior.
HCD-GT220/GT440/GT660
3
1. 
SERVICING  NOTES
  .............................................   4
2. GENERAL
  ..................................................................   6
3. DISASSEMBLY
3-1.   Disassembly Flow ...........................................................   7
3-2.   Case (Side-L), Case (Side-R) ..........................................   8
3-3.   Case (Top) .......................................................................   8
3-4.   LID (CD) .........................................................................   9
3-5.   CD Mechanism Deck, USB R Board ..............................   9
3-6.   Front Panel Block ...........................................................   10
3-7.   Mecha Deck (CWM42FF609) ........................................   10
3-8.   Back Panel Block ............................................................   11
3-9.   MAIN Board, POWER Board ........................................   11
3-10.  CD Board ........................................................................   12
3-11.  DRIVER Board, SW Board ............................................   12
3-12.  Optical Pick-up Block (KSM-213D) ..............................   13
3-13.  SENSOR Board ..............................................................   13
3-14.  MOTOR (TB) Board.......................................................   14
3-15.  MOTOR (LD) Board ......................................................   14
4. TEST 
MODE 
 .............................................................   15
5. MECHANICAL 
 
ADJUSTMENTS 
 ......................   19
6. ELECTRICAL 
 
ADJUSTMENTS 
 ........................   20
7. DIAGRAMS
7-1.  Block Diagram - CD SERVO, USB 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 - CHANGE Section - .................   30
7-8.  Schematic Diagram - CHANGE Section - .....................   31
7-9.  Printed Wiring Board - USB R Board - ..........................   32
7-10.  Schematic Diagram - USB R Board - .............................   33
7-11.  Printed Wiring Board - TC Board - .................................   34
7-12.  Schematic Diagram - TC Board - ...................................   35
7-13.  Printed Wiring Boards - MAIN Section - .......................   37
7-14.  Schematic Diagram - MAIN Section (1/4) - ...................   38
7-15.  Schematic Diagram - MAIN Section (2/4) - ...................   39
7-16.  Schematic Diagram - MAIN Section (3/4) - ...................   40
7-17.  Schematic Diagram - MAIN Section (4/4) - ...................   41
7-18.  Printed Wiring Board - MIC Board - ..............................   42
7-19.  Schematic Diagram - MIC Board - .................................   43
7-20. Printed Wiring Board 
 
- AMP Board (GT220/GT660) - .....................................   44
7-21.  Schematic Diagram - AMP Board (GT220/GT660) - .....   45
7-22.  Printed Wiring Board - AMP Board (GT440) - ..............   46
7-23.  Schematic Diagram - AMP Board (GT440) - .................   47
7-24. Printed Wiring Boards 
 
- SUB WOOFER Section (GT440/GT660) - ..................   48
7-25. Schematic Diagram 
 
- SUB WOOFER Section (GT440/GT660) - ..................   49
7-26.  Printed Wiring Boards - PANEL Section - .....................   50
7-27.  Schematic Diagram - PANEL Section - ..........................   51
7-28.  Printed Wiring Boards - KEY Section - ..........................   52
7-29.  Schematic Diagram - KEY Section - ..............................   53
7-30. Printed Wiring Board 
 
- TRANSFORMER Board (GT220/GT660) - ................   54
TABLE  OF  CONTENTS
7-31. Schematic Diagram 
 
- TRANSFORMER Board (GT220/GT660) - ................   55
7-32. Printed Wiring Board 
 
- TRANSFORMER Board (GT440) -.............................   56
7-33. Schematic Diagram 
 
- TRANSFORMER Board (GT440) -.............................   57
8. 
EXPLODED  VIEWS
8-1.   Case Section ....................................................................   66
8-2.   KEY TOP Board Section ................................................   67
8-3.   TC Mecha Deck Section .................................................   68
8-4.   PANEL Board Section ....................................................   69
8-5.   Front Panel Section .........................................................   70
8-6.   MAIN Board Section ......................................................   71
8-7.   POWER Board, SUB WOOFER Board Section ............   72
8-8.   Chassis Section ...............................................................   73
8-9.   CD Mechanism Deck, Section-1 
 (CDM74KF-K6BD91UR-WOD) 
...................................  
74
8-10.  CD Mechanism Deck, Section-2 
 (CDM74KF-K6BD91UR-WOD) 
...................................  
75
9. 
ELECTRICAL  PARTS  LIST
  ..............................   76
Accessories are given in the last of the electrical parts list.
HCD-GT220/GT440/GT660
4
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 electrostat-
ic 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 fl exible 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 refl ective surface by the objective lens in the optical 
pickup 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 viscous (sticky, less prone to fl ow) 
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 [
?/1
] button to turn the power on.
2.  Press the [CD] button to select “CD”.
3.  While pressing the [
x
] button, press the [
Z
] button until “UN-
LOCKED” displayed on the fl uorescent indicator tube (around 
5 seconds).
Note: When 
LOCKED
 is displayed, the antitheft lock is not released 
by turning power on/off with the
 [
?/1
]
 button.
HOW  TO  OPEN  THE  TRAY  WHEN  POWER  SWITCH  
TURN  OFF
Note:  Work after removing the side panel refering to SECTION 3 DIS-
ASSEMBLY (page 7).
  Turn the gear (loading A)
 
to the direction of the arrow.
Page of 94
Display

Download Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Service Manual (Repair Manual)

Here you can view online or download Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Audio. Information contained in Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 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).