Yamaha RX-397 Schematic
RX-397
■ BLOCK DIAGRAM
FM/AM
FM/AM
PHONO
TUNER
7.2MHz
PHONO EQ
IC301
OPERATION
• See page 30 → SCHEMATIC DIAGRAM
CD/DVD
AUX
Analog
MD
TAPE
OPERATION
• See page 30 → SCHEMATIC DIAGRAM
IR REMOTE
U801
SPEAKER SW/STANDY SW
SW823/SW828/SW825
VOLUME
VR431, IC431
INPUT SELECTOR
SW827
FUNCTION
75
74,18
78,79
84,85
2,29
3,28
Switch
7,24
5,26
4,27
11,20
• See page 29 → SCHEMATIC DIAGRAM
PRD
PRV
PRI
80
91
90
THMR
93
POWER
20
Microprocessor
M30626
IC602
12,19
IC501
NJU7313AM
8,23
6+9,22+25
/RESET
DETECT
12
Motor Volume
VR431/IC431
70
72
76,77
65
81
OPERATION
• See page 30 → SCHEMATIC DIAGRAM
IC401
Pure Direct SW
SW402
Tone
Con/Balance
VR751-754
MD
TAPE
POWER RELEY
HP RERAY
SPEAKER RELEY
MUTE CONTROL
POWER SAVE
REC OUT
Muting
Q401,402
/MIMT
RY251
F251/J252
TE251
F252
MAIN
Power
Amp
• See page 31 → SCHEMATIC DIAGRAM
ACH
ACL
ACL
ACH
ACL
ACL
ACL
C135C144
C803
SW101
SW101
+
C140
C141
D112-115
–22V
Q801
RY103
RY101
RY102
D806
C834,835
C157,158
C156,159
+15V
Q121
–15V
Q128
D111
D109
D110
Head Phone
Front A
Front B
+B
G
–B
+15
G
–15
VP
G
FL1
FL2
28
KEY
SW801-818
FL DISPLAY
V801
FL DRIVER
IC801
94,95
83,100,1,2
SERIAL
CONTROL
13
XL601
16MHz
15
TUNER/RDS
ANALOG
D259
IC251,252,253
Q254
Power
Detector
/Reset
C261
s10
RY251
D261
Q252
POWER RELAY
+5.5V
IC601
D605
D604
Q605
D603
POWER SAVE
+5BU
+5M
+5S
G
ABCDEFGH
IJK
RX-397
1
■ SCHEMATIC DIAGRAM (FUNCTION)
I
C501
: NJU7313AM
Analog Function Switch
L1
2
L2
3
L3
4
L4
5
L-COM1
6
L5
7
8
L6
L-COM2
9
10
L7
11
2
L-COM3
VDD
VEE
NC
L8
12
14
ST
30
1
13
LEVEL SHIFTER
LATCH
CONTROL
LATCH
LEVEL SHIFTER
29
28
27
26
25
24
23
22
21
20
19
17
16
15
18 NC
R1
R2
R3
R4
R-COM1
R5
R6
R-COM2
R7
R8
R-COM3
DATA
CK
VSS
Page 31 C-2
TO MAIN (1) W103
Page 30 A-7
TO OPERATION (1) CB801
Page 30 J-6
TO OPERATION (13) CB301
3
0
0
0
4
CD/DVD
0
0
0
0
0
0
0
0
AUX
0
0
0
0
0
0
0
5
0
Page 30 A-2
TO OPERATION (2) CB407
Page 30 A-3
TO OPERATION (2) CB401
10.1 5.4 5.4
0
4.8
5.4
4.8
4.7
5.4
4.8 4.8
4.2
0.1
0.1
0
5.2 11.9
5.6
4.8
4.7
5.6
11.9 14.5
12.3
12.3
00
IC603 : LC72722PM
VDDA
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
RDS Decoder
VREF
3
REFERENCE
4
2
20
21
22
23
7
8
9
10
VOLTAGE
ANTIALIASING
1 5 6
57kHz
SMOOTHING
CCB
TEST
bpf
(SCF)
RAM
(24 BLOCK DA TA)
MEMORY
CONTROL
FILTER
11 16 17 13 12
T5T6T7
Point q (Pin 13 of IC602)
FL OUT
C IN
+
VREF
FILTER
ERROR CORRECTION
(SOFT DECISION)
CLK(4.332MHz)
OSC/DIVIDER
X IN
PLL
(57kHz)
X OUT
CONTROLLER
SYNC
DETECT -1
CLOCK
RECOVERY
(1187.5Hz)
DAT A
DECODER
SYNC/EC
DETECT -2
SYNC
14
15
19
18
24
VDDD
VSSD
RDS-ID
SYNC
SYR
MD IN
MD OUT
6
TAPE PB
7
TAPE
REC OUT
0
0
0
-0.6
0
0
14.2
-14.5
-0.6
0
0
0
4.7
4.7
0
4.8
1.6
1.8
1.7
0.9
4.8
0
1.7
4.7
4.7
4.7
4.8
4.7
0
4.7
4.7
4.8
4.8
4.4
4.7
0
000
4.7
4.6
000
0
0
0
4.7
4.7
0
2.3
2.2
0
4.7
0
4.7
0
0
4.7
4.8
4.7
4.7
4.7
4.7
0
0
0
4.7
4.7
0
0
0
0
0
0
0
4.6
0
4.7
4.7
4.8
4.7
-14.4
8
1
*
All voltages are measured with a 10MΩ/V DC electronic volt meter.
* Components having special characteristics are marked Zand
must be replaced with parts having specifications equal to
those originally installed.
* Schematic diagram is subject to change without notice.
29
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