Page 1
RX-797
■ BLOCK DIAGRAM
XM
• See page 34 → SCHEMATIC DIAGRAM
U, C models
XM
FM/AM
PHONO
OPERATION
• See page 32 → SCHEMATIC DIAGRAM
CD
DVD
DTV
VCR
Analog
MD/TAPE
FUNCTION
DVD
DTV/CBL
Composite
VCR-PB
OPERATION
• See page 32 → SCHEMATIC DIAGRAM
IR REMOTE
U801
POWER SW/STANDY SW/ZONE2 SW
SW830/SW825/SW826
VOLUME
VR431, IC431
INPUT SELECTOR
SW827
KEY
SW801-818
FL DISPLAY
V801
3
XMDT
PHONO EQ
FL DRIVER
IC801
AK4384ET
I2S
IC1
FM/AM
TUNER
7.2MHz
IC301
IC302
IC505
IC506
IC507
IC508
• See page 31 → SCHEMATIC DIAGRAM
2ch DAC
IC25
11,10
Muting
Q301,302
11dB
ATT
IC509
/CDMT
74,18,19
78,79
84,85
94,95
83,100,1,2
IC26
75
PRI
80
90
13
8,23
2,29
3,28
10,21
7,24
5,26
4,27
11,20
1,2
INA
3,4
INB
5,6
INC
IND
7,8
9,10
INE
11,12
INF
ING
13,14
15,16
INH
VCR
4
DVD
6
DTV
8
6
DVD
8
DTV
VCR
4
DVD
6
8
DTV
THML
PRD
PRV
91
92
Micro Processor
M30622
IC602
XL601
16MHz
19,22,25
8,9,12
IC501
Switch
NJU7313AM
25,26 REC A
23,24 REC B
IC502
BD3841FS
19,20
RecOut/Zone2 Selector
Input
Selector
LA7956
IC451
RecOut
Selector
LA7956
IC452
Zone2
Selector
LA7956
IC453
THMR
93
15
1
1
1
POWER
DETECT
20
13,24
/RESET
12
Motor Volume
VR431/IC431
Volume IC
YAC526
IC503
70
72,76,77
24,25,63,65
81
27
55-60
SERIAL
CONTROL
CD Direct SW
SW401
CD Direct On
CD Direct Off
+10.6dB/
+16dB
15,21
Q501-504
POWER RELEY
SPEAKER RELEY
MUTE CONTROL
POWER SAVE
XMPWR
VIDEO SELECTOR
• See page 32 → SCHEMATIC DIAGRAM
IC401
Pure Direct SW
SW402
Tone
Con/Balance
VR751-754
/Z2MT
Muting
ZONE2 VOLUME
TUNER/RDS/XM
ANALOG
OPERATION
Pure Direct Off
VCR
MD/TAPE
ZONE2
MONITOR OUT
VCR-REC
Zone2
LPF/MIX
IC510,504
REC OUT
Composite
Muting
Q401,402
Muting
Q351,356
IC351
–6dB
Muting
Q354-355
/MIMT
/POMTMIMT
RY251
SubWoofer OUT
MAIN IN
PRE OUT
F251/J252
TE251
IC251,252,253
Q254
D259
Power
Amp
F252
RY103
C834,835
RY101
RY102
C121,122
MAIN
ACH
ACL
ACL
ACH
R171
ACL2
R227
ACL2
ACL
C160C161
R172
XM
• See page 34 →
SCHEMATIC DIAGRAM
U, C models
C33
Power
Detector
/Reset
C261
D21
Head Phone
D116-119
+5V
IC27
C143
C144
–22V
Q102
Front A
Front B
+5V
IC22
+5.5V
IC601
D110
+15V
Q130
–15V
Q131
D120
D121
D122
+3.3V
IC21
D605
D604
D603
POWER SAVE
C119,120
• See page 33 → SCHEMATIC DIAGRAM
SW101
SW101
+
C803
s10
RY251
D261
Q252
POWER RELAY
+B
G
–B
+15
G
–15
VP
G
+5BUS
+5X
+3.3X
G
FL1
FL2
XMPWR
+5BU
+5M
Q605
+5S
G
30
Page 2
ABCDEFGH
IJK
RX-797
■ SCHEMATIC DIAGRAM (FUNCTION)
C351, 504–510
Dual OP-Amp
: NJM2068MD-TE
I
C451–453
: LA7956
Video Switch
I
1
0.1
0.1
0
0
0.1 0.2
0.2
2
0
0
0.3
15.1
0.3
0.3
4.8
14.7
0
0
0
0
0
0
-14.4
6.1
0.1
4.8
3.9
0
3.9
11.8
3.9
3.9
11.9
6.2
0.1
0.1
3.9
0
3.9
11.8
3.9
3.9
6.2
0.1
0.1
3.9
0
3.9
11.8
3.9
3.8
14.3
12.2
11.8
0
OUT
–V
1
1
2
–IN
1
–+
3
+IN
1
4
CC
–+
+V
CC
8
OUT
2
7
–IN
2
6
5
+IN
2
L-COM1
L-COM2
L-COM3
ST
VDD
0
-14.7
3
0
0
-14.7
0
CD DIRECT AMP OFF
VEE
NC
IC502 : BD3841FS
Function Switch
DGND
CL
DA
VEE
GND
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
VCC
0
-14.7 -14.7
0
CD DIRECT AMP ON CD DIRECT AMP OFF
0
0
6 dB
AMP
DRIVER
1A2B3
VIDEO
OUT
I
C501
CONTROL
VIN14GND5VIN26VCC7VIN38VIN4
: NJU7313AM
Analog Function Switch
L1
2
L2
3
4
L3
5
L4
6
7
L5
L6
L7
L8
RECA1
8
9
10
11
12
14
30
1
13
RECA2
LEVEL SHIFTER
RECB1
LATCH
CONTROL
RECB2
RECC1
LATCH
RECC2
4-INPUT 1-OUTPUT
VIDEO SWITCH
29
28
27
26
25
24
23
LEVEL SHIFTER
22
21
20
19
17
16
15
18 NC
OUT1
OUT2
R1
R2
R3
R4
R-COM1
R5
R6
R-COM2
R7
R8
R-COM3
DATA
CK
VSS
INI1
9
INI2
Page 34 I-5
TO XM CB23
Page 33 B-1
TO MAIN (4) CB284
Page 32 A-7
TO OPERATION (1) CB801
Page 32 K-6
TO OPERATION (13) CB301
LOGIC
F-SW1: INPUT FUNCTION 1
F-SW2: INPUT FUNCTION 2
+–+
–
+–+
–
4
Page 32 A-2
TO OPERATION (2) CB407
F-SW2
F-SW1
13.2
0
0
0
0
0
0
-13.2
13.2
0
0
5
0
0
0
0
-13.2
13.2
0
0
0
0
0
0
-13.2
6
13.4
0
0
0
0
0
0
-13.2
7
0
0.7
0
0
0.7
0
0
0.7
0
0
0.7
0
0
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6.2
-6.1
-6.1
6.2
0
0
0
0
00
0
0
0
0
0
0
0
0
-7.1
0
7.2
0
0
0
0
0
0
0
0
0
0
0
0
-6.1
0
4.8
6.2
00
14.3
14.3
0
0
0
0
0
0
-14.1
0
0
0
0
0
0
-14.1
Page 32 A-4
TO OPERATION (2) W401
Page 32 A-3
TO OPERATION (2) CB401
CD DIRECT AMP OFF
14.9
0
0
0
0
0
0
-14.5
0
0
0 -14.9
0
0
6.2
-7.1
0
7.2
7.9
7.9
0
0
0.1
15.1
15.1 15.1
6.2
6.8
6.8
0
0
0.5
0.5
-6.1
-14.9 -14.9
TO XM CB24
Page 34 I-3
CD DIRECT AMP ON
5.6
9.8
5.6
5.6
0
5.6
1.73.6
00
4.8
-14.7
4.8
4.1
4.8
-14.7
4.8
4.8
4.9
4.9
4.8
4.9
4.8
4.8
4.1
4.8
4.2
0.1
4.8
0.1
4.8
0
0
0
0
4.8
4.8
4.9
3.0
3.6
1.7
0.9
4.8
0
0.1
4.8
4.8
4.8
4.8
4.8
4.8
4.8
0
0.9
4.8
4.8
4.8
00000
11.9
5.2
5.5
5.5
0
4.700
4.8
0
4.8
0
4.8
0
4.8
2.4
0
15.1
11.9
12.4
11.2
0
4.8
4.8
4.5
4.1
4.1
0.3
0.3
0.3
0.3
0.3
0
4.8
4.8
4.8
4.8
0
4.8
2.4
0.3
0
4.8
4.8
4.8
0.1
4.8
4.8
4.8
0.1
0.1
0.1
4.8
0.1
0.5
0.1
0.1
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
4.8
0.1
5.1
4.8
1
4.1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
INF1
INA1
INA2
INB1
INB2
INC1
INC2
IND1
IND2
INE1
INE2
INF2
ING1
ING2
IC503 : YAC526-EZE2
2 Channel High Grade Digital Volume
REF1B
REF1A
AVDD
DGND
REF
AVSS
DVSS
REF2A
REF2B
24
IN1
Vol B: 10k
22
23
Zero
Crossing
Detector
5
6
Zero
Crossing
7
Detector
14
15
Vol B: 10k
13
IN2
0 ~ -95dB
Vol A: 15k
Control
Register
Vol A: 15k
0 ~ -95dB
0 ~ +31.5dB
16
0 ~ +31.5dB
OP Amp
S/P
Register
OP Amp
100
100
21
OUT1
10
TE1
11
TE2
12
TE3
1
ZCEN1
2
ZCEN2
9
SDATAO (Open Drain)
4
SDATAI
8
SCLK
3
CSN
16
OUT2
IC603 : LC72722PM
RDS Decoder
VDDA
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
VREF
3
REFERENCE
4
2
20
21
22
23
7
8
9
10
VOLTAGE
ANTIALIASING
1 5 6
FILTER
CCB
TEST
57kHz
bpf
(SCF)
(24 BLOCK DA TA)
MEMORY
CONTROL
11 16 17 13 12
T5T6T7
RAM
FL OUT
VREF
SMOOTHING
FILTER
ERROR CORRECTION
C IN
+
(SOFT DECISION)
CLK(4.332MHz)
OSC/DIVIDER
X IN
PLL
(57kHz)
X OUT
CONTROLLER
SYNC
DETECT -1
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
SYNC/EC
DETECT -2
SYNC
Point q (Pin 13 of IC602)
INH1
14
15
19
18
24
INH2
VDDD
VSSD
RDS-ID
SYNC
SYR
4.8
4.1
4.8
*
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.
31
Page 3
ABCDEFGH
RX-797
IJKL
1
■ SCHEMATIC DIAGRAM (OPERATION)
I
C301, 302, 401, 751
CD DIRECT AMP ON
15.1
13.7
15.1
11.7
0
0
13.9
0
0
13.7
NJM2068MD-TE
Dual OP-Amp
1
OUT
1
2
–IN
1
–+
3
+IN
1
4
–V
CC
CD DIRECT AMP OFF
2
Page 31 E-4
TO FUNCTION (2) CB611
PURE DIRECT OFF
0
13.0
3
0
0
0
-14.6
0
0
-14.6
0
PURE DIRECT ON
Page 33 A-6
TO MAIN (1) CB103
:
+V
CC
8
OUT
2
7
– +
–IN
2
6
5
+IN
2
14.4
0.1
0
-14.3
PURE DIRECT OFF
0.1
0.1
0.1
0.7
Page 31 E-5
TO FUNCTION (2) W601
I
C431
: LB1641
Motor Driver
P1
0
0.6
0.8
0.8
0
4.7
4.7
Page 31 E-5
4
TO FUNCTION (1) CB503
0
-12.8
0
0
CD DIRECT AMP OFF
-15.3
-14.6
-16.2
-16.2
-17.8
-17.8
-19.5
-16.2
-16.2
-21.1
-21.1
-21.1
-21.1
-16.2
-16.2
-21.1
-21.1
-16.2
-16.2
-21.1
-21.1
-21.1
-16.3
-16.2
-21.1
-19.5
-21.1
-16.2
-17.8
-19.4
-17.8
-16.0
-16.1
-16.2
-17.8
-21.1
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-15.3
15.1
13.4
0.8
0.6
IN 1
GND
5
1
OUT 18VCC 210OUT 2
23
INPUT LOGIC
5
-21.1
-16.2
-16.3
-21.1
-21.1
-21.1
-16.2
-16.2
-21.2
-21.1
-16.3
-21.1
-16.2
-21.1
4.8
-21.1
P2
9
VCC 1
7
4
VZ
PRE DRIVER
IN 2
6
I
Display Driver
2
CS
3
SCK
4
SDATA
7
XIN
6
XOUT
1
RESET
8
Vcc1
18
Vcc2
5
Vss
64
Vp
C801
: M66003-0131FP
Serial
receive
circuit
Clock
generator
Display code
RAM
(8-bit x 60)
Code
write
data
Code/
command
control
circuit
timing
Display
clock
controller
code
select
dot data
write
scan pulse
CGROM
(35 bit x 166)
CGROM
(35 bit x 16)
Segment
output
circuit
Segment
digit
select/
output
circuit
Digit
output
circuit
44
19
17
45
52
51
50
49
48
47
46
9
63
53
SEG00
SEG25
SEG26
SEG34
SEG35
DIG11/
SEG42
DIG12/
SEG41
DIG13/
SEG40
DIG14/
SEG39
DIG15/
SEG38
DIG16/
SEG37
DIG17/
SEG36
DIG00
DIG10
-19.5
-19.5
-21.3
-16.2
-16.2
-16.2
-19.5
-17.8
-16.2
-16.2
-14.6
-15.7
-18.5
2.1
2.2
0
4.8
4.8
4.8
4.8
-18.5
-21.3
14.7
0
00
0
0
14.7
0
0
0
0
0
-14.5
0
0
-14.5
CD DIRECT AMP OFF
0
0.8
0
0
0.8
0
CD DIRECT AMP ON
Page 31 H-4
TO FUNCTION (2) CB607
-21.1
-19.5
-21.1
-16.2
-17.8
-19.4
-17.8
-16.0
-16.1
-16.2
-17.8
-21.2
6
-19.4
4.8
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
0000
7
0
4.8
4.8
Page 31 G-4
TO FUNCTION (2) CB606
8
*
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
Page 33 B-1
TO MAIN (4) CB283
32
those originally installed.
* Schematic diagram is subject to change without notice.
Page 4
ABCDEFGH
IJK
RX-797
1
Page 32 E-8
TO OPERATION (1) W802
Page 31 F-4
TO FUNCTION (2) CB605 TO POWER TRANSFORMER
■ SCHEMATIC DIAGRAM (MAIN)
Temperature Sensor
+Vs
GND
Vout
2
IC101, 102 : LM61CIZ
0.9
3
0.9
4
6.0
0
15.1
6.0
0
-14.9
15.6
15.6
-15.5
-15.5
19.1
0
0
-19.6
0.1
0.7
-19.0
-14.8
19.1
19.0
-21.5
0
-21.6
-21.6
-32.6
0.1
0.7
0
19.2 19.2
19.1
0
19.1
0
19.1
-5.7 -19.6
-19.6
-19.6
-33.2 0.1
19.1
0
0
-19.6
55.7 (45.1)
00
-55.8
(-45.1)
AC81.4
AC66.0
AC30.9
TO POWER TRANSFORMER
Point w
CH 1 : (+) of C272
CH 2 : Collector of Q271
Page 33 K-6
TO MAIN (2) CB257
↑
TO POWER TRANSFORMER
2
55.2
55.7
55.6
0
55.4
0
0
0
2
CH2
4.7
0
0
0
0
6.9
-54.8
55.2
-54.1
-54.7
55.2
54.6
1.2
-54.7
1.2
-0.4
-1.0
-1.1 -1.1
55.7
1.1
0.6
-0.5
-55.8
55.2
54.6
0.6
5
0.60.6
0.10.1
-54.7
-54.7
-54.7
-54.7
-54.7
-54.8
-54.8
6
-54.8
-55.3
55.7
1.6
0
0
-0.5
-55.8
55.7
0.6
00
0
-0.5
-55.8
CH1
5.4
4.8
4.9
0.2
4.9
0
0
3.4
9.8
0
3.7
TO POWER TRANSFORMER
Page 33 I-4
TO MAIN (5) W291
AC POWER ON
(Connect the power cable)
AC POWER ON
(Connect the power cable)
or
↑
AC POWER OFF
(Disconnect the power cable)
↑
SPEAKERS
Page 32 E-2
TO OPERATION (2) W404
-54.8
7
-54.8
-54.8 -54.7
0.7 0.7
8
-54.7
0.7
-54.7
54.6
-55.3-55.3
-54.7
-54.8
54.6
55.2
55.7
-54.8
-54.2
-1.0
-1.0
-0.5
1.2
1.2
54.6
55.2
-54.8
0.10.1
-54.2
-1.0
-0.5
0.6
1.2
55.7
-54.2
-0.5
0
0
0.6
55.7
-54.2
-0.5
0
0
0.6
55.7
0
0
0.1
0
55.4
~
-28.3
0.2
-28.2
0
-29.1
-22.8
-28.5
-29.1
~
~
~
~
~
-29.1
~
0
0.8
0.1
23.9
-18.3
-29.1
~
-29.1
-29.1
-29.1
-29.1
0
0.1
*
23.9
0
-29.1
AC6.5
~~
9.9
9.9
IC252 : TC4013BP
Dual D Flip Flop
1
1Q
Q
2
1Q
Q
3
CP
1CP
4
CL
1CL
5
1PR
VSS
D
6
PR
7
1DATA
14
VDD
13
2Q
Q
12
2Q
Q
11
CP
2CP
10
CL
2CL
9
D
2DATA
PR
8
2PR
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.
33
Page 5
ABCDEFGH
RX-797
IJKL
1
■ SCHEMATIC DIAGRAM (XM)
3
2
1.2
1.2
0
0
1.6
3.3
1.6
3
0
0
0
3.3
0
0
~
0
4
003.3
3.3
~
0
1.2
~
1.2
3.3
0
0
1.2
0
3.3
0
0
3.3
3.3
3.3
0
3.3
3.3
5.1
5.1
0
4.8
4.8
0
3.3
1.2
0
Page 31 E-8
TO FUNCTION (2) CB604
~
~
3.3
0
0
~
0
0
0
~
2.1
0
0
3.3
0
~
~
0
~
4.8
0
0
5.1
0
2.6
2.6
2.6
5.1 5.1
5
11.0
5.3
0.4
4.8
5.15.13.3
6
5.3
0.4
00
3.3
3.3
5.1
0
0
11.0
0
5.1
0
7.2
0
0
Page 31 C-4
0
0
-7.1
0
11.0
5.0
AC9.2
5.0
0
TO FUNCTION (1) W506
TO POWER TRANSFORMER
7
IC24 : SN74LV245APWR
Octal 3-State Bus Transceivers
DIR
1
A1
2
A2
3
A3
GND
4
5
A4
6
A5
A6
7
8
A7
9
A8
10
8
IC23 : SN74AHCT1G32DCKR
Single 2 Input OR
GND
1
A
2
B
3
VCC
5
Y
4
V
CC
20
19
ENG
B1
18
B2
17
B3
16
B4
15
B5
14
13
B6
12
B7
B8
11
IC26 : NE5532DR
Dual OP-Amp
1
OUT
1
2
–IN
1
–+
3
+IN
1
4
–V
CC
IC27 : PQ05RD11
Rgulator
+V
CC
8
OUT
2
7
– +
–IN
2
6
5
+IN
2
VIN VO
I C
3
GND
21
4
CV
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
34
IC25 : AK4384ET
D/A Convertter
6
7
8
LRCK
4
2
BICK
3
SDTI
P/S
9
µP
INTERFACE
AUDIO
DATA
INTERFACE
5
PDN
ATT
ATT
DE-EMPHASIS
CONTROL
8X
INTERPOLATOR
8X
INTERPOLATOR
MCLK
1
CLOCK
DIVIDER
∆ ∑
MODULATOR
∆ ∑
MODULATOR
SCF
SCF
14
13
12
15
12
11
10
VDD
VSS
VCOM
DZFR
DZFL
AOUTL
AOUTR
Point e (Pin 28 of IC1)
*
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.
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