Sony HCD-LX7 / HCD-LX8 / LBT-LX7 / LBT-LX8 Service Manual ▷ View online
HCD-LX7/LX8
21
21
– MAIN (2/2) SECTION –
MAIN CONTROL
IC501 (2/2)
1
27
93
42
43
18
29
30
81
80
84
82
83
86
85
87
88
90
89
100
91
1
27
93
42
43
STK-POWER
PROTECT
FL OFF
STBY RELAY
HP MUTE
18
29
30
WAKE UP
IIC-CLK
IIC-DATA
93
43
42
42
1
27
29
30
18
POWER
ECO
STK POWER
PROTECT
HP MUTE
DATA
CLOCK
WAKE UP
IC933
M+7V (UNSW)
PL A+10V
7V
ST +10V
TC MOTOR+12V
FAN
1
3
1
3
+10V
REG
+12V
REG
IC931
IC932
FAN SWITCH
Q961, 963
+UNREG, 17V
M901
2
Q931
SWITCH
Q932
SWITCH
SWITCH
+7V
REG
1
3
ST A-7V
2
3
–7V
REG
IC951
UN–12V
Q903
SWITCH
Q904
SWITCH
SWITCH
1
3
+7V
REG
IC901
UN+12V
2
Q911
SWITCH
Q912
SWITCH
SWITCH
DETECTOR
Q905
TC–7V
–7V
LED-7V
ST A+7V
TC+7V
+7
LED+7V
(LED+7V)
1
3
+5V
REG
IC911
LED 5V
RDS D+5V UNSW
D+5V UNSW
2
Q911
SWITCH
Q912
SWITCH
SWITCH
5V
AU D+5V
Q913
SWITCH
D+5V (SW)
A+5V (SW)
EVER +5V
(CD D+5V SW)
(CD A+5V SW)
(D+5V SW)
5
Q914
SWITCH
POWER
SECTION
POWER
SECTION
I
DISPLAY
SECTION
SECTION
J
72
69
75
73
74
77
76
78
79
57
56
58
59
63
61
65
68
19
33
32
35
37
20
50
21
49
52
51
53
54
54
55
BIAS
REC-MUTE
ALC
EQ-H/N
PB-A/B
A-PLAY-SW
B-PLAY-SW
A-HALF
B-HALF
A-SHUT
B-SHUT
TC-RELAY
A-TRG
B-TRG
CAP-M-H/L
CAPM-CNT 2
CAPM-CNT 1
TC-MUTE
AMS IN
R/PB/PAS
NR-ON/OFF
NR-ON/OFF
HOLD
SENS
DISC-SENS
XLT
XRST
TBL-R
TBL-L
ENC 3/UP-SW
ENC 2/DISC-LED
SCOR
SQ-CLK
SQ-DATA
CD-DATA
CD-CLK
RDS-INT
STEREO
RDS-DATA
ST-MUTE
ST-CE
TUNED
ST-DOUT
ST-DIN
ST-DIN
ST-CLK
36
H/P IN
5
CD-POWER
2
POWER
10
XC-IN
11
XC-OUT
13
X-OUT
15
X-IN
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
NORM/HIGH
PB A/B
A PLAY
B PLAY
A-HALF
B-HALF/REC A/REC B
A SHUT
B SHUT
RELAY
A TRG
B TRG
CAP-M-H/L
CAPM-CNT 2
CAPM-CNT 1
LM ON/OFF
MS OUT
REC/PB/PASS
NR ON/OFF
HOLD
SENS
TRAY.SENS
XLT
X-RST
TBL.R
TBL.L
UP SW
LED
SCOR
SQCK
SQSO
DATA
CLOK
RDS-INT
STEREO
RDS-DATA
ST-MUTE
ST-CE
TUNED
ST-DOUT
ST-DIN
ST-CLK
FAN DET
HP.SW
POWER
SECTION
H
BD (CD)
SECTION
A
DECK
SECTION
B
X501
32.768kHz
X502
16MHz
LX7
L
09
(Page 22,
23)
(Page 18)
(Page 19)
(Page 22, 23)
(Page 24)
(Page 22, 23)
FM/AM TUNER
TUNER UNIT IS
SUPPLED AS THE
ASSEMBLED
BLOCK
TUNER UNIT IS
SUPPLED AS THE
ASSEMBLED
BLOCK
• R CH : Same as L ch
Q902
SWITCH
SWITCH
HCD-LX7/LX8
22
22
– POWER SECTION – (LX8 model)
F-RELAY
L-CH IN
EVER +5V
GUITAR LEVEL
RV851
GUITAR AMP
IC852 (1/2)
STK-POWER
11
6 3
4
VOLUME
CONTROL
18
POWER AMP & VOLUME CONTROL
IC801
VOLUME
CONTROL
D802, 852
THERMAL
SENSOR
Q831-832
PROTECT
DC AMP
Q433-434
L-CH THERMAL
PROTECT SWITCH
Q801
LATCH
DRIVER
Q432
MUTE
CONTROL
Q834
MUTE
SWITCH
Q803
HEAD PHONE
MUTE
Q833
MUTE
DRIVE
Q804
HP-MUTE
PROTECT
09
D804
MIC-SIG
J803
TM401
PHONES
L
R
FRONT
RELAY
DRIVER
Q401-402
PROTECT
SWITCH
Q439
R-CH
RY401
LATCH
DRIVER
Q437
PROTECT
SWITCH
Q431
SWITCH
Q904
–35V REG
Q903
RECT
D831
D831
VF (–35V)
+VH
VF
VF
RECT
D833-836
+UNREG. 12V
UN +10V
UN –10V
RECT
D841-844
AC-L
AC-L
RECT
D832
D832
POWER
TRANSFORMER
T951
VOLTAGE
SELECTOR
VS901
AC
IN
MAIN 1
SECTION
G
(Page 20)
MAIN 2
SECTION
I
(Page 21)
MIC-SIG
HP.SW
DISPLAY
SECTION
K
(Page 24)
MAIN 1
SECTION
C
(Page 20)
MAIN 2
SECTION
H
(Page 21)
EXCEPT MX,AUS
EXCEPT
MX,AUS
JW971
240V
230V
120V
F951
JW967
JW969
JW965
EXCEPT
MX,AUS
AUS
ONLY
MX ONLY
AUS ONLY
MAIN 1
SECTION
E
(Page 20)
MAIN 2
SECTION
L
(Page 21)
• SIGNAL PATH
: FM
: FM
• R CH : Same as L ch
MUTE
SW
Q805
FAN DET
FAN DETECTOR
D405
GUITAR AMP
IC852 (2/2)
J802
GUITAR
DBFB
MIC AMP
IC850 (1/2)
MIC VOLUME
RV850
MIC AMP
IC850 (2/2)
J801
MIX MIC
R-ch
TH831
HCD-LX7/LX8
23
23
– POWER SECTION – (LX7 model)
GUITAR AMP
IC852 (2/2)
J802
GUITAR
DBFB
F-RELAY
L-CH IN
EVER +5V
MIC AMP
IC850 (1/2)
MIC VOLUME
RV850
MIC AMP
IC850 (2/2)
GUITAR LEVEL
RV851
GUITAR AMP
IC852 (1/2)
STK-POWER
6
POWER AMP & VOLUME CONTROL
IC801
VOLUME
CONTROL
D802, 852
PROTECT
DC AMP
Q433-434
LATCH
DRIVER
Q432
MUTE
CONTROL
Q834
MUTE
SWITCH
Q803
HEAD PHONE
MUTE
Q833
MUTE
DRIVE
Q804
HP-MUTE
D804
TM401
L
R
FRONT
RELAY
DRIVER
Q401-402
PROTECT
SWITCH
Q439
R-CH
RY401
LATCH
DRIVER
Q437
PROTECT
SWITCH
Q431
RECT
D907-910
SUB-TRANSFORMER
T901
AC
IN
POWER
ECO
09
POWER
SWITCH
Q902
RECT
D902-905
+5.6V
REG
IC901
+5.6V
1
3
SWITCH
Q907
–30V REG
Q903, 908
Q903, 908
SWITCH
Q904-905
SWITCH
Q906
VF
VF
RECT
D831
D831
+VH
RECT
D841-844
+VL
–VL
RECT
D832
D832
POWER
TRANSFORMER
T951
RECT
D833-836
+UNREG. 12V
UN +10V
–VH
STANDBY
RELAY CONTROL
Q901
STANDBY
RELAY
RY901
RY901
JW954
230V
J801
MIX MIC
PROTECT
MIC-SIG
J803
PHONES
MIC-SIG
FAN DET
HP.SW
DISPLAY
SECTION
K
MAIN 1
SECTION
MAIN 2
SECTION
H
11
18
3
4
VOLUME
CONTROL
THERMAL
SENSOR
Q831-832
L-CH THERMAL
PROTECT SWITCH
Q801
UN –10V
VG
ONLY
MAIN 1
SECTION
G
(Page 20)
MAIN 1
SECTION
E
(Page 20)
MAIN 2
SECTION
L
(Page 21)
MAIN 2
SECTION
I
(Page 21)
(Page 24)
(Page 20)
(Page 21)
C
• SIGNAL PATH
: FM
: FM
• R CH : Same as L ch
MUTE
SW
Q805
FAN DETECTOR
D405
R-ch
TH831
HCD-LX7/LX8
24
24
– DISPLAY SECTION –
6
4
3
5
79
78
73
22
70
X601
12.5MHz
72
13
12
11
14
16
17
19
20
21
18
17
16
43
28
27
LINE NF
REC LEVEL
OUTPUT
DISPLAY CONTROL (FOR MIC)
IC603
REC LEVEL
F06
F05
F04
F02
F01
RESET
DATA
CLOCK
WAKE UP
MIC–SIG
SPEANA
09
MAIN 1 SECTION
MAIN 2 SECTION
POWER SECTION
MAIN 1 SECTION
LINE IN
REC IN
REC NF
BPF 4
ALL BAND
BPF 3
BPF 2
I
2
C DATA
RESET
I
2
C CLK
WAKE UP
X IN
DISPLAY CONTROL
IC601
X OUT
BPF 1
BPF 0
45
67
SEG-1
FLUORESCENT INDICATOR TUBE
FL601
23
29
VF
40, 42
GR-3
14, 2
DRIVER
74
75
77
9
10
3
4
5
14
15
13
LED DRIVER
KEY MATRIX
VOLUME
D601 – D603
7
80
Q601 – Q603
Q605 – Q607
Q608 – Q610
D604 – D607, D611, D612, D616 – D621,
D623 – D627, D635 – D638
D623 – D627, D635 – D638
D700
D631, D632, D641
11
15
LED POWER
SWITCH
1
REMOTE
CONTROL
RECIEVE
IC702
S701
2
8
.
AMS >
S701
JOG
S691
Z
OPEN
SIRCS
JOG A
JOG B
VOLUME A
VOLUME B
KEY 0
KEY 4
LED SCK
LED LATCH
LED DAT
DAILY LED
REC LED
LED-EC0
GR-1
GR-15
GR-16
LED SEL
D-SW
1
3
5
7
11
20
22
•
•
•
P3
P5
P7
P9
P16
•
•
•
17
19
P1
P2
CLK
STB
DATA
SERIAL
PARALLEL
CONVERTER
IC701
•
F
J
K
D
(Page 22, 23)
(Page
21)
(Page 20)
(Page
20)
+5VL
+5VH
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