Sony HCD-GT220 / HCD-GT440 / HCD-GT660 / MHC-GT220 / MHC-GT440 / MHC-GT660 Service Manual ▷ View online
HCD-GT220/GT440/GT660
21
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent when
the signal level is low than specifi ed value with the following
checks.
checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
–
CD board
TP121 (RFI)
TP124 (VC)
TP124 (VC)
oscilloscope
(DC range)
Procedure :
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the [
?/1
] button to turn the power on.
3. Set disc (YEDS-18) on the tray and press the [
u
] button to
playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.2
1.2
± 0.3 Vp-p
Checking Location:
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101
FM TUNE LEVEL CHECK
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C sig-
4. Confi rm “TUNED” is lit on the display for A, B and C sig-
nals.
When the selected station signal is received in good condition,
“TUNED” is displayed.
“TUNED” is displayed.
TUNER SECTION
CD SECTION
HCD-GT220/GT440/GT660
22
MEMO
HCD-GT220/GT440/GT660
HCD-GT220/GT440/GT660
23
23
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM - CD SERVO, USB Section -
SYSTEM CONTROLLER
IC901 (1/4)
CD-MP3 PROCESSOR
IC101
MUTE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
95
89
A
BD+3.3V
DETECTOR
FNi1 (A)
RFo
97 FPi1 (B)
88
2
AGCi
3
RFRP
RFZi
7
6
TEi
TEZi
83
RFEQo
81 RFi
82 RFRPi
82 RFRPi
30
LO
27
RO
65
AIN (PI4)
66
BCKi (PI5)
BCK
A-IN
BUS1-U
BUS0-U
BUS2-U
BUS3-U
BUCK-U
67
LRCKi (PI6)
LRCK
51
PIO3
GATE
46
AoUT3 (PO4)
ST-REQ
38
BUS0
R-CH
94 FNi2 (C)
96 FPi2 (D)
100 TNi (E)
98 TPi (F)
91 LDo
92
MDi
2 VO1+
1 VO1–
13 DMo
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
B
C
D
E
F
12 FMo
10 TRo
9 FOo
20 IO0 (/HSO)
I-V AMP
M401
(SPINDLE)
M402
(SLED)
12 VO2–
11 VO2+
18 VO3+
17 VO3–
26 VO4+
27
7
IN4’ 24
IN3’ 20
IN2’ 9
IN1 3
BIAS 23
84 VRo
VO4–
M
M
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
S201
(LIMIT)
BD+3.3V
24 XO
23 XI
X102
16.9344MHz
7 CD-M-MUTE
A
CD-L
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: USB
VCC
A
B
C
D
E
F
LD
PD
SP+
VC
SP–
SL+
SL–
T+
T–
F+
F–
47
AOUT2 (PO5)
63
BCK (PO8)
CLK
DATA
1
2
17 CD-BUS0 (I/O)
13
39
BUS1
3
4
16 CD-BUS1 (I/O)
5
40
BUS2 (SO)
9
8
15 CD-BUS2 (I/O)
12 CD-BUCK
6
41
BUS3 (SI)
11
10
14 CD-BUS3 (I/O)
19 CD-SEL1
19 CD-SEL1
12
BUS SWITCH
IC301
1
2
13
3
4
5
5
9
8
6
6
11
10
12
12
BUS SWITCH
IC302
DATA SELECTOR
IC303
SELECT
42
BUCK (CLK)
4
2
3
CCE-U
13 CD-CCE
43
XCCE
54
SBSY
48
PIO0
7
18 MP3 IREQ
21 CD-SEL2
29 I-SBSY
37
XRST
6 CD XRST
5
REQ-U
6
12
14
13
9
10
11
1
CLK
DATA
LB
I/O0 – I/O15
D0 – D15
S-RAM
IC921
39
UB
40
OE
41
WE
17
CE
6
79
D+
80
D–
77
USBOC
USB CONTROLLER
IC901
CN803
(USB)
3
2
1
D+
D–
78
USBPON
70
CS2
64
RD
65
WR
66
SRLLB
67
SRLUB
VBUS
VBUS POWER
ON/OFF SWITCH
IC915
5
1
4
OUT
EN
3
FLG
IN
VBUS
+5V
93 DATA
92 BCK
92 BCK
85 DATA
86 CLOCK
86 CLOCK
71 LRCK
94 GATE
97 ST-REQ
94 GATE
97 ST-REQ
55 BUS0
56 BUS1
56 BUS1
88 RXD1
87 TXD1
87 TXD1
2 DI
84 DO
1 /RESET
57 BUS2
58 BUS3
59 /BUCK
60 /CCE
96 REQ
58 BUS3
59 /BUCK
60 /CCE
96 REQ
7 – 10, 13 – 16,
29 – 32, 35 – 38
18 – 25, 28 – 35
A0 –
A15
A1 –
A16
44 – 42, 27 – 24,
21 – 18, 5 – 1
37 – 43, 46 – 54
73 X2
75 X1
X901
9MHz
AUTOMATIC
POWER
CONTROL
Q301
BCK
A-IN
LRCK
GATE
ST-REQ
GATE
ST-REQ
BUS1-U
BUS0-U
BUS2-U
BUS3-U
BUCK-U
CCE-U
REQ-U
BUS3-U
BUCK-U
CCE-U
REQ-U
43
O-USB-TXD (SO)
42
I-USB-RXD (SI)
10
O-USB-RST (DO)
9
I-USB-CTS (DI)
11
O-USB-RESET
LOADING MOTOR DRIVE
IC701
FIN
RIN
RIN
O-LM-F
S751
LEVEL SHIFT
Q731
DISC TABLE
ADDRESS SENSOR
IC731
23
OUT1 4
OUT2 2
OUT2 2
7
9
9
O-LM-R 22
M
M751
(LOADING)
TABLE MOTOR DRIVE
IC712
FIN
RIN
RIN
O-TM-F 25
OUT1 4
OUT2 2
OUT2 2
7
9
9
O-TM-R 24
I-CD-SENS 26
I-ENCD 55
I-OPEN-SW 27
M
M741
(TABLE)
ROTARY
ENCODER
S711
DISC TABLE
ADDRESS DETECT
OPEN
CLOSE
DISC TABLE
OPEN/CLOSE
DETECT
REC/
ERASE
D801
(USB)
O-USB-LED 37
LED DRIVE
Q931
(Page 24)
HCD-GT220/GT440/GT660
HCD-GT220/GT440/GT660
24
24
7-2. BLOCK DIAGRAM - MAIN Section -
R-CH
HP IN
B
CD-L
A
T001
BIAS OSC
MUTING
Q305
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(PB)
(DECK-A)
L-CH
R-CH
R-CH
L-CH
R-CH
R-CH
R-CH
R-CH
MUTING
Q307
MUTING CONTROL
SWITCH
Q305, 306
MUTING
Q401, 403
R-CH
MUTING
CONTROL SWITCH
Q407
REC CONTROL
SWITCH
Q409, 410
R-CH
REC AMP
IC401
PB AMP
IC301
ERASE
BIAS OSC
Q453
REC SWITCH
Q405
PB SWITCH
(DECK-B)
Q303
REC BIAS
SWITCH
Q454, 455
AUDIO
+9V
+9V
R-CH
PB SWITCH
(DECK-A)
Q301
R-CH
+
DECK-A/B
SELECT SWITCH,
REC/PB
SELECT SWITCH
Q408
TUNER (FM/AM)
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
PLL DO
R-CH
PLL DI
PLL CLK
PLL CE
FM 75
Ω
(COAXIAL)
ANTENNA
31 I-LV23004T-DI
TUNED
34 I-TUNED
39 TAPE-L
1 TUNER-L
2
5
LIN
DA
TA
6
CLK
16
DA
TA
15
CLK
2
10
AUX-L
37 MIX2
11 VOL IN-L
TONE OUT-L
14
OUT-L
9
LOUT
40 CD-L
O-BIAS
33 O-LV23004T-DO
32 O-LV23004T-CLK
28 O-LC72121-CE
32 O-LV23004T-CLK
28 O-LC72121-CE
49
O-REC/PB
46
O-REC-MUTE
48
O-F-DA
TA
41
4
SAOUT
I-STREAM
67
O-AUDIO-CLK
45
O-P-DA
TA
44
I-HP/MIC
58
12
BB12
13
BB22
D
SW OUT
C
OUT
E
BASS AGC
3
REC OUT-L
I-V
ACS
I-TAPE-STAT
59
D213
D211
BAND-PASS
FILTER
Q111, 112
+4.1V
REGULATOR
Q701
+
R-CH
R-CH
M+9V
BASS AGC
Q113
BUFFER
Q702
D031
3
PARAMETRIC EQUALIZER
IC102
(GT660)
(GT220/GT440)
INPUT SELECTOR, TONE CONTROL,
ELECTRICAL VOLUME
IC103
CAMP+
M
TAPE MECHANISM
DECK BLOCK
A-HALF
B-SOL
B-HALF
A-PHOTO
B-PHOTO
B-REC-F
B-PHOTO
B-REC-F
CAPSTAN/REEL
MOTOR DRIVE
Q911, 914
TRIGGER PLUNGER
DRIVE (DECK-B)
Q912, 915
60
O-B-SOL 87
A-SOL
TRIGGER PLUNGER
DRIVE (DECK-A)
Q913, 916
O-A-SOL 88
O-MOTOR 85
I-RELL-A 78
I-RELL-B 79
SYSTEM CONTROLLER
IC901 (2/4)
: TUNER (FM/AM)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK-A)
: TAPE PLAY (DECK-B)
: MIC
: TAPE REC
: AUDIO IN
(GT440/GT660)
AUDIO+9V
J801
MIC
RV801
MIC LEVEL
MUTING
Q801
MIC AMP
IC801 (1/2)
MIC AMP
IC801 (2/2)
4
L+R SIGNAL
D-LIGHT B+
D-LIGHT
SYNC OUT
J701
R
J802
AUDIO
INPUT
L
(Page 25)
(Page 23)
(Page 25)
(Page 25)
(Page 25)
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