Sony HCD-GRX50 / HCD-R770 / HCD-RXD7 / MHC-GRX50 / MHC-R770 / MHC-RXD7 Service Manual ▷ View online
HCD-GRX50/R770/RXD7
– 23 –
– 24 –
7-3.
BLOCK DIAGRAM – MAIN Section –
DBFB CONTROL
SWITCH
Q111
BASS FREQUENCY
CONTROL SWITCH
Q201
RESET SIGNAL
GENERATOR
IC502
POWER AMP
IC801
CD-L
J101 (1/2)
A
(Page 20)
(Page 22)
C
(Page 22)
PB-L
B
(Page 25)
SPEANA
D
R-CH
R-CH
R-CH
05
FM/AM TUNER UNIT
VOLUME
CONTROL
CPU
INTERFACE
BASS BOOST
CONTROL
CIRCUIT
INPUT
SELECT
SWITCH
SOUND
CONTROL
CIRCUIT
GRAPHIC EQUALIZER
CONTROL CIRCUIT
R-CH
FEED BACK
SWITCH
Q112
R-CH
COMMAND
F OUT2
BUF
OUT2
VOL
IN2
IN2
+
+
R-CH
R-CH
R-CH
R-CH
D141
R-CH
+
+
+
MIC LEVEL
RV712
ECHO LEVEL
RV711
MIC AMP
IC712 (2/2)
MUTING
Q113
OVER LOAD
DETECT
Q801
TEMPERATURE
DETECT SWITCH
Q831, 832
DC DETECT
SWITCH
Q433, 434
RESET SWITCH
Q501
RELAY
DRIVE
Q431
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC101
IN E2
IN D2
IN B2
IN A2
IN C2
IN A2
IN C2
KEY IN2
KEY IN1
KEY OUT 2
KEY OUT 1
L+R
DATA
CLOCK
LATCH
493-DATA
493-CLK
493-LATCH
DBFB-H/L
BASS FREQ.
PROTECTOR
XC-OUT
X613
16MHz
X601
32.768kHz
XC-IN
X-OUT
X-IN
BB B2,
BB A2
MIC IN
SUPER
WOOFER
REC A2
REC-L
D191
REC B2
• SIGNAL PATH
: CD PLAY
: TAPE PLAY
: RECORD
: TUNER (FM/AM)
: MIC INPUT
TH831
+5V
R-CH
+
R-CH
R-CH
M501
(FAN)
(FAN)
R-CH
–1
–2
+
MUTING
Q191
MUTING
Q411, 471
FAN MOTOR
DRIVE
Q401, 402
PROTECT
SWITCH
Q192
R-CH
R-CH
OVER LOAD
DETECT SWITCH
Q432
PROTECT SWITCH
Q439
PROTECT SWITCH
Q435, 436
OVER LOAD
DETECT SWITCH
Q437
STANDBY SWITCH
Q803, 804, 881
MUTING CONTROL
SWITCH
Q508, 509
MUTING CONTROL
SWITCH
Q412
J701
PHONES
TM401
SPEAKER
IMPEDANCE USE 6 – 16
Ω
J711
MIX MIC
L
L
R
R
VIDEO
(AUDIO) IN
MD IN
J101 (2/2)
L
R
MD OUT
J191
SUPER
WOOFER
ANTENNA
ST-L
FM ANT
FM ANT
AM ANT
AM ANT
ST-R
ST-MUTE
STEREO
TUNED
ST-DIN
ST-DOUT
RDS-DATA
RDS-INT
ST-CLK
ST-CE
ST-MUTE
STEREO
TUNED
STEREO
TUNED
ST-DOUT
ST-DIN
ST-CLK
ST-CLK
ST-CE
RDS-DATA
RDS-INT
FM
75
Ω
FM 75
Ω
COAXIAL
AM
38, 39
D607
D644
D803
RY401
+
–
–
+
SYSTEM CONTROLLER
IC501 (3/4)
+
MIC AMP
IC712 (1/2)
DIGITAL ECHO
IC711
(Page 25 )
RESET
E
(GRX50: Saudi Arabia)
(GRX50/RXD7: Canadian)
(EXCEPT RXD7: Canadian)
(EXCEPT RXD7: Canadian)
(GRX50/RXD7: Canadian)
27
F-RELAY
3
11
10
13
15
7
44
STK-MUTE
1
LINE-MUTE
RESET
6
12
AC-CUT 22
RY-SW 36
47
48
38
60 5
59 6
30
2
58
57
42
41
72
36
34
BUF IN2
37
32
33
49
50
51
54
53
52
55
20
21
65
66
68
69
67
(R770/RXD7: AEP)
(R770/RXD7: AEP)
M
L
R
HCD-GRX50/R770/RXD7
7-4.
BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
– 25 –
– 26 –
REGULATOR
CONTROL SWITCH
Q903, 923
D925
D501, 502
+7V
REGULATOR
IC901
–26V
(FL DRIVER (IC601) B–)
+12V
REGULATOR
IC903
+10V
REGULATOR
Q909
–7V
REGULATOR
Q914, 951, 952
+7V
REGULATOR
Q901, 902, 913
ST +10V
(FM/AM TUNER UNIT B+)
TC M+12V
(TC MOTOR SECTION B+)
CD M+7V
(CD MOTOR SECTION B+)
B+ SWITCH
Q907, 908
D509
B+ SWITCH
Q904, 905
+5V
REGULATOR
IC902
+5V REGULATOR
IC11
RECT
D907 – 910
RECT
D901 – 904
RECT
D12 – 15
AC IN
POWER AMP (IC801),
PROTECTOR CIRCUIT
PROTECTOR CIRCUIT
POWER TRANSFORMER
T951
RECT
D17 – 20
RECT
D832
D832
RECT
D831
D831
VOLTAGE
SELECTOR
S951
RECT
D971
D971
RELAY DRIVE
Q11
FL ON/OFF
SWITCH
Q12, 17
FL ON/OFF
SWITCH
Q14 – 16
–26V REGULATOR
Q13
–26V REGULATOR
Q971
AC IN
SUB POWER TRANSFORMER
T11
RY11
+7V
TC, PANEL,
AUDIO
–7V
FAN MOTOR B–
VF1
TO FLUORESCENT
INDICATOR TUBE
(FL601)
VF2
B+
B–
B+
B–
REMOTE CONTROL
RECEIVER
IC602
GRID DRIVE
Q607 – 612
FLUORESCENT INDICATOR TUBE DRIVER,
KEY CONTROL
IC601
SYSTEM CONTROLLER
IC501 (4/4)
LED DRIVER
IC604
BAND-PASS FILTER
IC603
Q603
LED +5V
S LOW FREQ (BPF0)
18
BPF2
19
BPF3
20
BPF4
GRID DRIVE
Q613
DET
DET
B.P.F.
21
ALL BAND (L+R)
REC IN
LINE
IN
1
SIRCS
ROTARY
ENCODER
S601
ROTARY
ENCODER
S602
2
JOG-A
9
VOL-A
8
JOG-B
10
72
70
VOL-B
XOUT
XIN
B+ SWITCH
Q601, 602
LED DRIVE
Q606
KEY0 – KEY3
BPF1
F01
F04
F05
F06
F05
F06
F02
GR1
(Page 23)
(Page 23)
D
D611 – 616, 619 – 622, 624,
D627 – 631, 751 – 753
SPEANA
L SEL
7
TIMER LED 26
LED DATA
5
LED SCK
3
LED LAT
DATA
CLK
4
13
14
15
45
I2C DATA
I2C CLK
IIC-DATA
FL SW
IIC-CLK
RESET
RESET
17
79
78
29
WAKE UP
WAKE UP
22
18
30
42
STBY RELAY 43
CD-POWER
5
POWER
2
73
16
14
13
12
L+R
11
16
17
4
6
11 – 14
S1 – S22
46 – 67
G13 – G18
32 – 27
G2 – G12
44 – 42, 40 – 33
17, 19 – 23, 2, 3, 5, 7, 10, 11
P1 – P6, P8, P9, P11, P12, P15, P16
S601
(JOG DIAL)
S611 – 621, 625 – 630,
S638 – 651, 751 – 757
05
S602
VOLUME
X601
12.5MHz
E
STB
LED DRIVE
Q604, 605
STBY LED 39
D632
TIMER SELECT
D754
I/u
(R770/RXD7)
(GRX50)
(GRX50)
(GRX50)
(GRX50)
(GRX50)
(R770/RXD7)
(R770/RXD7)
(R770/RXD7)
(R770/RXD7)
EXCEPT E2, E3, Saudi Arabia,
Argentina, Singapore, Taiwan
Argentina, Singapore, Taiwan
E2, E3, Saudi Arabia, Argentina,
Singapore, Taiwan
Singapore, Taiwan
CD D+5V, CD A+5V
CD MECHANISM DECK
SECTION B+
+5V
SYSTEM CONTROLLER
(IC501) B+
D+5V
M62493FP (IC101),
CD SENSOR CIRCUIT B+
D923
D405 – 407
(GRX50)
(R770/RXD7)
D+5V
(TAPE DECK SECTION B+)
+5V (STBY)
(PANEL SECTION B+)
LED +5V
(PANEL SECTION B+)
D922
(GRX50)
(EXCEPT RXD7: Canadian)
(R770/RXD7)
D924
(GRX50)
(R770/RXD7)
FLUORESCENT INDICATOR TUBE
FL601
HCD-GRX50/R770/RXD7
– 27 –
– 28 –
7-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
p
: parts mounted on the conductor side.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
Indication of transisitor.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: TUNER (FM/AM)
E
: PLAYBACK (DECK A)
d
: PLAYBACK (DECK B)
G
: RECORD
J
: CD PLAY (ANALOG OUT)
c
: CD PLAY (DIGITAL OUT)
N
: MIC INPUT
• Abbreviation
AED
: North European model.
AR
: Argentine model.
AUS
: Australian model.
CND : Canadian model.
E2
E2
: 120 V AC Area in E model.
E3
: 240 V AC Area in E model.
EA3
: Saudi Arabia model.
EA4
: Israel model.
G
: German model.
KR
: Korean model.
MX
: Mexican model.
SP
: Singapore model.
TH
: Thai model.
TW
: Taiwan model.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
• Circuit Boards Location
• Abbreviation
AR
: Argentine
AUS
: Australian
CND : Canadian
E2
E2
: 120 V AC Area in E model
E3
: 240 V AC Area in E model
EA3
: SaudiArabia
EA4
: Israel
KR
: Korean
MX
: Mexican
SP
: Singapore
TH
: Thai
TW
: Taiwan
CD SW board
SUB TRANS board
(RXD7/R770)
(RXD7/R770)
TRANS board
MAIN board
PANEL board
TUNER PACK
(CND, E2, MX)
TUNER (FM/AM)
(AEP, UK, EA4, TH, AR, KR, AUS)
TUNER (FM/MW/SW)
(E3, EA3, SP, TW)
(CND, E2, MX)
TUNER (FM/AM)
(AEP, UK, EA4, TH, AR, KR, AUS)
TUNER (FM/MW/SW)
(E3, EA3, SP, TW)
CONNECTOR board
SENSOR board
MOTOR (TURN) board
MOTOR (SLIDE) board
LEAF SW board
AUDIO board
BD board
HCD-GRX50/R770/RXD7
– 29 –
– 30 –
7-6.
PRINTED WIRING BOARD – BD Board –
•
See page 28 for Circuit Boards Location.
• Semiconductor
Location
(Side A)
(Side A)
Ref. No.
Location
Q101
C-3
• Semiconductor
Location
(Side B)
(Side B)
Ref. No.
Location
IC101
C-2
IC102
B-1
IC103
B-1
(Page 43)
05
05
KSS-213D/Q-NP
19
)
(
)
(
)
(
TP(VC)
TP(RF)
TP(TE)
TP(FE1)
TP(FE)
TP
(AGCCON)
TP(GND)
21
21
31
31
,
,
21
21
31
31
,
,
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