Read Sony STR-LV500 Service Manual online
STR-LV500
15
15
– DISPLAY/POWER SECTION–
•Signal Path
: FM
HP-L (+)
HEADPHONE
AMP
IC402
HP-L (–)
HP-R (+)
HP-R (–)
6
5
2
3
FL (+)
DIGITAL POWER AMP
IC404
FR (+)
FR (–)
FL (–)
6
7
8
16
9
19
17
18
INA
OUTA
OUTB
ENA
DIAGA
INB
INB
ENB
DIAGB
DIGITAL POWER AMP
IC406
6
7
8
16
9
19
17
18
INA
ENA
DIAGA
INB
INB
ENB
DIAGB
OUTA
OUTB
C (+)
C (–)
WO (+)
WO (–)
DIGITAL POWER AMP
IC407
WOOFER AMP
IC409
6
7
8
16
9
19
17
18
INA
ENA
DIAGA
INB
INB
ENB
DIAGB
OUTA
OUTB
SL (+)
SL (–)
DIGITAL POWER AMP
IC410
6
7
8
16
9
19
17
18
INA
ENA
DIAGA
INB
INB
ENB
DIAGB
OUTA
OUTB
SR (+)
SR (–)
EN
DIGITAL POWER AMP
IC412
6
7
8
16
9
19
17
18
INA
ENA
DIAGA
INB
INB
ENB
DIAGB
OUTA
OUTB
7
1
PHONES
J401
J402
PROTECT
Q402,403
Q402,403
PROTECT
Q404,405
Q404,405
RY401
RELAY
DRIVE
Q401
D420
D421
PROTECT
Q406,407
Q406,407
D423
PROTECT
Q409,410
Q409,410
D424
PROTECT
Q411,412
Q411,412
D425
+
-
-
-
+
+
-
-
+
+
7
3
6
5
J403
1
RY402
RELAY
DRIVE
Q408
56
41
Q413
POWER KEY
KEY_INPUT (A/D3)
INPUT
SELECTOR
S802
SOUND
FIELD
S803
MUTING
S804
=/1
S801
S805
TUNING
-
TUNING
+
S806
55
25
DIAG
HP DETECT
17
HEADPHONE RELAY
16
WOOFER RELAY
67
VOL (A)
66
VOL (B)
+5V
+1.8V
+1.8V
REG
IC401
1
3
SW-RY
HP SW
HP -RY
SW-RY
HPSW
HP-RY
FRONT
L
FRONT
R
REAR
L
ERONT
R
SUB
WOOFER
AUDIO
OUT
VOLUME
CENTER
SPEAKERS
IMPEDANCE
USE 4–16
USE 4–16
Ω
(
(
RV801
IC801
54
1
VOUT
34
SIRCS
g
33
5
6
EEPROM
IC117
REGULATOR
IC903
IC906
SCL
SDA
SCL
SDA
EEPROM
FL DRV/
LED DRV
3
1
+3.3V
REG.
IC908
3
1
+3.3V
REG.
2
4
5
1
REGULATOR
IC907
SWITCHING REGULATOR
IC901
LEVEL
DETECT
IC902
2
4
5
1
3
2
1
BUFFER
IC904
FL DRIVER
IC802
BUFFER
IC803
+3.3V
(STBY)
+10V
+3.3V
+6.5V
+5V
L909
L906
Q901
Q912
(–30V)
RECT
D801,802
D804,805
D804,805
D803
+3.3V
+6.5V
PC901
D912
D905
D902
D902
D933
D906
D916,D917
D911
T901
POWER
TRANSFORMER
61 62 63
8 10 12 48
DIN
CLK
STB
VCONT
PWCONT2
PWCONT1
STOP
DIN
CLK
FL_STB
VCONT
PWCONT2
PWCONT1
STOP
77
28
27
49
51
FLASH2
MD0
MD2
MD0
MD2
FLASH1
RSTX
1
2
IC119
RESET
RESET
2
1
5
7
6
FLASH1
FLASH2
+3.3V (STBY)
5
4
6
1
2
3
10
9
8
Q908
Q903
PWCONT2
PWCONT1
VCONT
STOP
DIN
CLK
STB
+5V
3
1
BUFFER
Q912,913
FLUORESCENT
INDICATIOR
TUBE
FL801
DC/DC
CONVERTOR
Q801,802
+21V
REG.
Q905
REG.
Q905
+7.2V REG.
Q902
RECT
D109
D109
LF902
D919
D920
LF901
F1
L
N
AC IN
PC902
T801
3
2
1
4
5
D
VCC
FB/
OLP
OCP/
SYNC
7
8
9
30
DIN
CLK
STB
VEE
14
I
29
42
I
31
GRID1
I
GRID2
SEG1
I
SEG16
50
I
65
4
I
15
1
68
SYSTEM CONTROL
IC118 (2/2)
A
TUNER/DSP
SECTION
(Page 15)
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