Read Sony HT-DDW790 / HT-DDW795 / STR-K790 Service Manual online
15
15
STR-K790
STR-K790
4-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
• R-CH is omitted due to same as L-CH.
• Signal Path
: FM
IN2
8
12
+V OUT2
POWER AMP
IC501
POWER AMP
IC601
9
NF2
LIMITER
Q501,502
11
-V OUT2
IN2
12
+V OUT2
9
NF2
11
-V OUT2
BOOSTER
Q503
BOOSTER
Q504
CURRENT
DETECT
Q505,506
AF POWER
PROTECT
Q507
LIMITER
Q601,602
BOOSTER
Q603
BOOSTER
Q604
CURRENT
DETECT
Q605,606
IN2
8
12
+V OUT2
POWER AMP
IC701
9
NF2
LIMITER
Q701,702
11
-V OUT2
BOOSTER
Q703
BOOSTER
Q704
CURRENT
DETECT
Q705,706
2
+V OUT1
5
NF1
LIMITER
Q751,752
3
-V OUT1
BOOSTER
Q753
BOOSTER
Q754
CURRENT
DETECT
Q755,756
D1001
PROTECT
SWITCH
Q881-883
RELAY
DRIVE
Q509
RY502
RELAY
DRIVE
Q608
RY551
D1111
RY601
D1110
RELAY
DRIVE
Q708
RY701
D1107
L
R
R
L
R-CH
R-CH
SR-CH
R-CH
R-CH
SR-CH
SR-CH
R-CH
R-CH
PHONES
TM602(1/2)
61
PROTECTOR
62
HP_RY
66
FRONT_A_RY/DG51_FB
69
C/REAR/SB_RY
RV102
ENCODER
3
2
VOL_ENCODER(B)
64
VOL_ENCODER(A)
65
POWER_KEY
56
?/1
S152
77
RSTX
48
STOP
54 SIRCS
63
FUSE DETECT
REMOTE
CONTROL
RECEIVER
1
IC102
D910-913
AC
IN
T900(AEP,UK)
T902(US,CND)
T902(US,CND)
RY901
D915
F901
D914
RELAY
DRIVE
Q901
D920-923
23
VCC5
84
VCC3
-7V
REG
3
2
+7V
REG
1
3
AUDIO
+7V
IC821
IC822
POWER_RY 58
RELAY
+B
D804-807
82
83
X0
X1
X1101
24MHz
F1
F2
L
SL
SL
C
A
IN1
6
SW
J790
FLUORESCENT
INDICATOR TUBE
FL101
9
FL_LAT
7 DIN
8 CLK
9 STB
16
FL_CLK
17
FL_DATA
14
29
31
31
SEG1-17
42
32
GRID1-11
F1
F2
FL DRIVE
IC100
ADCC
38
DC-CONTROL
68
S114-119
FUNCTION
KEY
A/D1
39
FUNCTION
KEY
A/D2
40
S103,104
SYSTEM CONTROL
IC1101(2/2)
AF POWER
PROTECT
Q607
AF POWER
PROTECT
Q707
FRONT
SURROUND
55
HP_DETECT
BUFFER
IC101
35
AVCC
36
AVRH
+3.3V
REG
3
1
IC1904
AUDIO
-7V
+10V
REG
3
1
TUNER
+10V
IC1902
T901
Q911
AC DET
1
2
IC1111
D811
R803
+B
-B
-B
SWITCH
Q851,852
-20V REG
Q801
FL101
-20V
POWER AMP
-B
+5V
REG
3
1
IC1031
PROTECT
DET
2
7
IC850
+5V
+2.5V
REG
5
+2.5V
+3.3V
REG
2
4
IC1901
+3.3V
+5V
REG
3
1
IC1001
AUDIO
+5V
SPEAKERS
IMPEDANCE USE 6-16
Ω
MASTER
VOLUME
VOLUME
RV101
ENCODER
3
2
ENC_B
32
ENC_A
31
INPUT
SELECTOR
8
RESET
5
1
IC2000
AMP
+3.3V
(STBY)
MAIN
SECTION
CENTER
SUB
WOOFER
(Page 14)
B
MAIN
SECTION
(Page 15)
AUTO CAL MIC
+7V
TM604(1/2)
TM602(2/2)
TM604(2/2)
DC
CONTROL
Q2001,2002
VACS
CONTROL
D841
R-CH
45
VAX CTRL
+5.8V
REG
4
1
2
IC5006
HDMI
+5.8V
+5.8V
+3.3V
REG
3
1
IC5003
HDMI
+3.3V
+3.3V
89
HDMI_CTRL
AEP,UK
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