Sony STR-DE375 Service Manual ▷ View online
16
16
STR-DE375
3-9. PRINTED WIRING BOARD – POWER SECTION –
CND MODEL ONLY
4
IC 950
17
17
STR-DE375
3-10. SCHEMATIC DIAGRAM – POWER SECTION –
IC B/D
18
18
STR-DE375
3-11. IC BLOCK DIAGRAMS
3-12. IC PIN FUNCTION DESCRIPTION
IC103
µPD780206GF-092-3BA (DISPLAY BOARD)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
I
O
O
O
—
—
O
O
O
I
—
—
—
—
I
—
O
O
O
O
I
O
I
I
—
I
—
I
I
I
I
I
I
—
—
—
—
I
I
—
—
—
—
—
O
—
I
O
I
I
Description
Power supply to
µ-com
Control Video IC switching (Not used)
Control Video IC switching (Not used)
Control mute of Video IC (Not used)
Not used
Not used
Volume IC data
Volume IC clock
Volume IC enable
Read
µ-com reset signal
Connection to a crystal resonator
Connection to a crystal resonator
Programming pow. supply (Cnnected to ground)
Not used
Read decoded RDS data
Power supply to
µ-com
Chip enable for ICs
Output clock signal
Output data signal
Chip enable for ICs
Tuner has tuned to a freq.
Muting tuner during scanning
Tuned freq. has stereo
Input tuner freq. data
Analog ground
Read remote sensor signal
Not used
Detect RDS signal level
Read version setting
Read key push signal
Read key push signal
Read key push signal
Read key push signal
Analog Power Supply
Analog reference voltage
Not used
Not used
Read decoded RDS clock
Read signal when AC off
µ-com ground
Not used
Not used
Not used
Not used
Control MUTING LED
Power supply to
µ-com
Detect Protector Status
Control Power relay
Read volume encoder changing
Read volume encoder changing
Pin Name
VDD +5V
S1
S2
IC.MUTE
P34
P33
S.DATA (M61501FP)
S.CLK (M61501FP)
S.CE (M61501FP)
RESET
X2
X1
VSS
—
RDS.DATA.IN
VDD +5V
S.CE (LV1050M)
S.CLK(DOLBY.TUNER)
S.DATA(DOLBY.TUNER)
S.CE (TUNER)
AUTO-STOP
T.MUTE
STEREO-IN
PLL.DATA
AVSS
SIRCS
P16
SIGNAL
VERSION
A/D IV
A/D III
A/D II
A/D I
AVDD +5.0V
AVREF
P03
P02
RDS.CLK.IN
STOP
VSS
P74
P73
P72
P71
MUTING LED
VDD +5.0V
PROTECT
POWER-RY
ENCODER
ENCODER
IC701, IC702 uPC2581V (MAIN BOARD)
PROTECTOR
DRIVE
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
PRE
DRIVE
PRE
DRIVE
BIAS CIRCUIT
REG
MUTE
+VOUT1
–
VOUT1
COMP1
NF1
IN1
GND
IN2
NF2
COMP2
–
VOUT2
+VOUT2
VCC1
VCC2
VEE
DRIVE
IC501 STK350-230 (MAIN BOARD)
1
2
3
4
5
6
7
8
9
TR3
R1
R2
TR4
TR6
TR7
R4
R9
TR5
TR1
TR2
R6
D4 D3
R7
R8
TR8
D1 D2
R5
R3
INPUT
NF
-VEOUT
+VEOUT
V
SS
GND
V
CC
SUB
IC1
BU1924 (MAIN BAORD)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
QUAL
R
D
ATA
VREF
VDD1
VSS1
MUX
VSS3
CMP
RCLK
XO
XI
(NC)
VDD2
VSS2
T1
T2
8TH SWITCHED
CAPACITOR
FILTER
PLL 57KHz
RDS/ARI
BIPHASE
DECODER
DEFFERENTIAL
DECODER
PLL
1187.5Hz
TEST
CLOCK
IC950 NJM2103 (POWER BOARD)
1
2
3
4
5
6
7
8
V+
VSB/SESIN
VSA
RESET
GND
OUTC
VSC
CR
VREF
+
–
–
+
–
+
–
+
Q
R
S
19
STR-DE375
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71 – 74
75 – 78
79
80 – 90
91 – 100
Pin Name
REAR-RY
CTR-RY
FRONT-RY
H/P-RY
WOOFER RY
SYS.POWER
P115
P114
FUNC.MUTE
P112
HP SW
P110
SET UP LED
NAME LED
LEVEL LED
SURR LED
P103
S.FIELD LED
B.B. LED
P100
P97 – P94
S15 – S12
VLOAD
S11 – S1
DIG10 – DIG1
Description
Control rear relay on/off
Control center relay
Control speaker relay
Control Headphone relay
Control Woofer relay
Detect power switch key
Not used
Not used
Control muting circuit
Not used
Detect headphone insert
Not used
Control Setup LED
Control Name LED
Control LEVEL LED
Control SURR LED
Not used
Control SF LED
Control Bass Boost LED (Not used)
Not used
Not used
Output signal to FL tube
Negative power supply
Output signal to FL tube
Output signal to FL tube
I/O
O
O
O
O
O
I
—
—
O
—
I
—
O
O
O
O
—
O
O
—
—
O
I
O
O
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