DOWNLOAD Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Service Manual ↓ Size: 5.57 MB | Pages: 94 in PDF or view online for FREE

HCD-GT220/GT440/GT660

OUT

BUFFER

IC251

C

BASS AGC

E

SW OUT

D

POWER AMP

MUTING

Q251

OVER LOAD

DETECT

Q441

OVER LOAD

DETECT

Q501

R-CH

MUTING

Q272

BUFFER

Q121

LINE AMP

IC252

STANDBY SWITCH

Q489

DC DETECT

Q481, 482

IC441 (GT220/GT660)

IC441 (GT440)

+

+

TEMPERATURE

DETECT

Q483, 484

TEMPERATURE

DETECT

Q503, 507

R-CH

R-CH

R-CH

TH441

+

+

+

POWER AMP

IC501

MUTING

CONTROL SWITCH

Q261

O-SYS-MUTE

1

O-STK-MUTE

36

O-SWR

2

+

R-CH

PROTECTOR

Q485

RELAY DRIVE

Q486, 488 (GT220)

Q480, 486, 488 (GT440/GT660)

+

PROTECT

DETECT

Q487

FAN MOTOR

DRIVE

Q043 – 045

FAN MOTOR

DETECT

Q046

RY441

B

HP IN

F

PROTECT

–1

–2

R

L

+

–

–
+

RY501

D037

M

M001

(FAN)

SPEAKER

PHONES

JK441

+

–

SUB WOOFER OUT

JK501

RELAY DRIVE

Q502

SUB WOOFER

SWITCH

Q274

R-CH

AUDIO+9V

J803

SYSTEM CONTROLLER

IC901 (3/4)

: TUNER (FM/AM)

SIGNAL PATH

R-ch is omitted due to same as L-ch.

DC DETECT

Q505, 506

(GT440/GT660)

(Page 24)

(Page 24)

(Page 24)

(Page 26)

(Page 24)

HCD-GT220/GT440/GT660

REMOTE CONTROL

RECEIVER

IC601

FL701

FLUORESCENT

INDICATOR

TUBE

76 O-SWR-LED

I-KEY0 –I-KEY3

KEY0 – KEY4

KEY0 – KEY3

KEY0

KEY4

FLUORESCENT INDICATOR

TUBE DRIVER

IC701

SYSTEM CONTROLLER

IC901 (4/4)

F906

RECT

D902 – 905

PROTECT

DETECT

Q011

RECT

D001

RECT

D910

D006

O-S-LED1 –

O-S-LED6

S601 – 608 (KEY0),
S611 – 616 (KEY1),
S621 – 628 (KEY2),
S631 – 638 (KEY3),

S641 – 649 (KEY4)

S608 (GT440/GT660),

S641 – 649 (GT660)

5

O-POWER-RELAY

35

I-AC-CUT

RESET SIGNAL

GENERATOR

IC902

RESET SWITCH

Q903 – 905

D902

+3.3V

BD+3.3V

UNREG +16V

VBUS+5V

EVER +10V

LEVEL SHIFT

Q908

57

I-PROTECTOR

90

RESET

83 I-WAKEUPKEY

56 I-KEY4

66 I-VOL

2 – 13,

15, 16

DR35 [S0] –

DR16 [S19]

38 – 19

DR0 [T0] –

DR13 [T13]

70 – 75

 61 – 64

LED DRIVE
Q601 – 606

GRID DRIVE

Q701 – 714

D601 – 606

(STREAM)

O-G-LED,
O-V-LED,
O-B-LED

38 – 40

LED DRIVE
Q921 – 923

LED DRIVE

Q607

D612

SUBWOOFER

77 O-STBY-LED

81 I-SIRCS-IN

D611

I

/ 

STANDBY

ROTARY

ENCODER

MASTER
VOLUME

OPERATION

DIAL

S651

BASS

D609

VOCAL

D608

GUITAR

D607

65 I-JOG

ROTARY

ENCODER

S652

94 X2

95 X1

X902

20MHz

91 XT2

92 XT1

X901

32.768kHz

SI

O-NJM3427A-DATA

49

84

SCK

O-NJM3427A2-CLK

48

86

CSb

O-NJM3427FA2-CS

51

68

RSTb

O-NJM3427FA2-RESET

52

69

(AC IN)

RY901

POWER ON/OFF

RELAY DRIVE

Q903

VOLTAGE

SELECTOR

S901

D+1.5V

+1.5V

REGULATOR

IC201

USB+3.3V

D008

D009

D301, 302

D908

AUDIO+9V

M+9V
M+7V

F907

RECT

D011 – 014

RECT

D021 – 024

F904
F905

RECT

D402

F908
F909

RECT

D401

D007

F

PROTECT

+9V

REGULATOR

IC021

+9V

REGULATOR

IC011

+3.3V

REGULATOR

IC006

+5V

REGULATOR

IC007

+4V

REGULATOR

Q901, 902

RELAY B+

3

O-FRONT-SP-RELAY

52

I-USB-MONI

8

O-USB-POWER

4

O-CD-POWER

B+ SWITCH

Q041, 042

B+ SWITCH

Q301, 302

B+ SWITCH

Q303, 304

–27V

REGULATOR

Q902

AMP

SECTION

B+

AMP

SECTION

B+

FOR

FLUORESCENT

INDICATOR

TUBE

(GT220/GT660)

(GT440)

–VFL

VF
VF

PT902

SUB POWER

TRANSFORMER

PT901

MAIN POWER

TRANSFORMER

(GT440/GT660)

(GT660)

45

46

XT

XTb

OSC

VDD+3.3V

D+3.3V,

VREF+3.3V

+VH
–VH

+VL
–VL

F909
F904

RECT

D401

+VCC
–VCC

(Page 25)

HCD-GT220/GT440/GT660

Note:
•  All capacitors are in μF unless otherwise noted. (p: pF) 50 

WV or less are not indicated except for electrolytics and 
tantalums.

•  All resistors are in Ω and 1/4 W or less unless otherwise 

specifi ed.

•      f : 

internal 

component.

•  2 : nonfl ammable resistor.

•  5 : fusible resistor.

•  C : panel designation.

•  A : B+ Line.

•  B : B– Line.

•  Voltages and waveforms are dc with respect to ground 

under no-signal (detuned) conditions.

  – CD Board –
  no mark : CD PLAY
  [         ] : USB
  – USB R Board –
  no mark : USB
  – TC Board –
  no mark : TAPE PLAY
  (         ) : TAPE REC
  ‹‹      ›› : TAPE A
  {         } : TAPE B
  – Other  Board –
  no mark : TUNER (FM/AM)
  (         ) : CD PLAY
  [         ] : TAPE PLAY
       

*

  : Impossible to measure

•  Voltages are taken with VOM (Input impedance 10 M

Ω).

  Voltage variations may be noted due to normal production 

tolerances.

•  Waveforms are taken with a oscilloscope.
  Voltage variations may be noted due to normal production 

tolerances.

•  Circled numbers refer to waveforms.

• Signal path.
  F : 

TUNER 

(FM/AM)

  J 

: CD PLAY

 

 : 

USB

  E 

: TAPE PLAY (DECK-A)

  d 

: TAPE PLAY (DECK-B)

  G : 

TAPE 

REC

  f : 

AUDIO 

IN

  N : 

MIC

Note:
•  X : parts extracted from the component side.

•  Y : parts extracted from the conductor side.

•   W  : indicates side identifi ed with part number.

•      f : 

internal 

component.

• 

 : Pattern from the side which enables seeing.

  (The other layers' patterns are not indicated.)

•  Indication of transistor.

 

 

Note: The components identifi ed by mark 0 or dotted 

line with mark 0 are critical for safety. 

 

Replace only with part number specifi ed.

Caution:
Pattern face side:
(Conductor Side)
Parts face side: 
(Component Side)

Parts on the pattern face side seen from 
the pattern face are indicated.
Parts on the parts face side seen from 
the parts face are indicated.

HCD-GT220/GT440/GT660

R402

C404

C403

R405

R408

IC401

R108

R109

C136

C135

R128

R130

R134

R13

5

R136

R129

R139

R143

R142

R140

C124

C125

C122

C123

R151

C138

C137

C140

C139

C142

C141

C143

R144

C100

C107

R414

C144

C146

C145

C147

C148

C149

C150

R148

R146

C105

C104

R145
R147

R149
R150

C118

C117

CN301

C30

3

C302

C301

R102

C127

C126

R101

C103

C113

C102

C10

1

C119

C12

0

R105

R106

C132

R104

R15

4

C116

R153

C109

C110

R110

IC101

R210

R209

R218

R208

R219

R207

R220

R206

R221

R205

R222

R204

R223

R203

R157

R156

R202

CN202

C152

C151

R224

M401

S201

M402

C405

C401

R415

R114

C153

R118

R212

R213

C10

6

C306

R303

R304

R302

R301

C30

7

Q301

C309

C128

C130

R155

C115

R111

R112

C133

R119

C112

C108

R214

R216
R121

C201

C202

C204

C205

R201

C206

IC201

C207

R211

X102

CD BOARD

(CONDUCTOR SIDE)

1-872-620-

11

(11)

(LIMIT)

M

(SPINDLE)

M

(SLED)

A

MAIN BOARD

CN302

TP124(VC)

TP121

(RFI)

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

1

3

5

4

CD BOARD

(COMPONENT SIDE)

1-872-620-

11

(11)

E

A

B

C

D

E

F

1

2

3

4

5

6

7

8

9

10

X102

(Page 37)