2
A
B
C
D
E
F
G
H
I
J
1
3
4
5
7
RX-V550/HTR-5750
RX-V450/HTR-5740/DSP-AX450
6
124
K12
K14
K16
K10
K11
K13
K15
K49
K54
K56
K50
K51
K61
K63
K36
K53
K55
K52
K28
K30
K32
K26
K29
K31
K25
K27
K20
K18
K19
K21
K23
K57
K60
K62
K64
K58
K59
K34
K37
K39
K38
K40
–
3
AV POWER
4
STANDBY
7A-1E
5
SYSTEM POWER
7A-1D
6
CD
7A-15
7
7A-C9
8
TUNER
7A-16
9
SLEEP
MD/CD-R
7A-57
10
DVD
7A-C1
11
V-AUX
7A-55
12
MULTI CH INPUT
7A-87
13
VCR
★
★ ★
7A-0F
AMP
–
14
7A-13
37
+10
–
38
ENTER
–
39
TITLE
–
15
–
16
17
D-TV/CBL
7A-54
18
TV VOL +
19
TV CH +
20
–
–
7A-1A
21
TV VOL –
–
22
TV CH –
–
23
VOLUME –
24
TV MUTE
25
TV INPUT
26
MUTE
7A-1B
–
–
7A-1C
27
1
28
2
29
3
30
4
31
5
32
6
–
–
–
–
–
–
33
7
–
34
8
–
35
9
–
36
0
–
K33
K35
K24
K41
K44
K46
K48
K42
K43
K45
K47
45
RETURN
46
–
–
47
DISPLAY
48
REC
49
REW
50
FF
51
AUDIO
52
PAUSE
–
–
–
–
–
–
53
SKIP –
–
54
SKIP +
–
55
STOP
–
K17
K9
–
Schematic
Key No.
YPC
Key
No.
Function
1
CODE SET
2
TV POWER
–
K22
56
PLAY
–
42
<
–
43
SELECT
–
44
>
–
40
–
41
MENU
–
–
7E-7F
7E-7E
7A-15
7A-C9
7A-16
7A-57
7A-C1
7A-55
7A-87
7A-0F
–
7A-13
–
–
–
–
7A-54
–
–
7A-1A
–
–
7A-1B
–
–
7A-1C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
MAIN
–
–
–
–
–
–
–
–
–
7E-BB
7E-BA
7A-D1
7A-CF
7A-D2
–
7A-CD
7A-D8
–
7A-D6
–
7A-D7
–
–
–
–
7A-D9
–
–
–
–
–
–
–
–
7A-DC
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ZONE2
–
ZONE2
–
–
–
–
–
–
–
–
7A-1E
7A-1D
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
SYSTEM
–
–
–
–
–
–
–
–
7C-80
–
–
–
–
–
–
–
–
–
–
–
–
7C-9D
7C-9E
7C-B1
–
–
–
–
–
–
–
–
7C-94
7C-95
7C-96
7C-97
7C-98
7C-99
7C-9A
7C-9B
7C-9C
7C-93
7C-B7
7C-B3
7C-A6
7C-8B
7C-86
7C-87
7C-AD
7C-83
7C-B9
7C-BA
7C-85
Yamaha1
–
–
7C-82
7C-B5
7C-B8
7C-B6
7C-B4
7C-B2
004.012
–
–
–
–
–
–
–
–
–
–
–
–
004.120
–
004.113
–
–
–
–
–
–
–
–
004.001
004.002
004.003
004.004
004.005
004.006
004.007
004.008
004.009
004.000
004.131
004.089
004.015
004.127
004.041
004.040
004.078
004.048
004.033
004.032
004.049
Yamaha3
–
DVD
–
004.044
004.090
004.092
004.091
004.088
004.084
048.012
–
–
–
–
–
–
–
–
–
–
–
–
–
–
048.200
–
–
–
–
–
–
–
–
048.001
048.002
048.003
048.004
048.005
048.006
048.007
048.008
048.009
048.000
048.131
048.089
048.015
048.055
048.041
048.040
048.078
048.048
048.033
048.032
048.049
Yamaha4
–
–
048.044
048.090
048.092
048.091
048.088
048.084
–
–
–
–
–
–
–
–
–
–
–
–
–
7C-5D
7C-15
–
–
–
–
–
–
–
–
–
7C-17
7C-18
7C-19
7C-1A
7C-1B
7C-1C
7C-1D
7C-1E
7C-1F
7C-16
–
–
7C-13
–
7C-06
7C-07
7C-12
7C-5A
7C-02
7C-03
7C-5B
Yamaha
–
LD
–
7C-05
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
79-1A
79-0B
–
–
–
–
–
–
–
–
–
79-11
79-12
79-13
79-14
79-15
79-16
79-17
79-18
79-19
79-10
–
–
79-0A
7A-4F
7A-0D
7A-0C
–
7A-09
7A-0B
7A-0A
7A-09
Yamaha1
–
CD
–
7A-08
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
79-1A
79-0B
–
–
–
–
–
–
–
7A-1B
–
–
79-11
79-12
79-13
79-14
79-15
79-16
79-17
79-18
79-19
79-10
–
–
79-0A
79-4F
79-05
79-06
–
79-55
79-04
79-07
79-56
Yamaha2
–
–
79-02
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7F-9A
7F-8A
–
–
–
–
–
–
–
–
–
7F-91
7F-92
7F-93
7F-94
7F-95
7F-96
7F-97
7F-98
7F-99
7F-90
–
–
7F-9E
–
7F-88
7F-89
–
7F-83
7F-86
7F-87
7F-84
Yamaha
–
CD-R
–
7F-82
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
79-8F
–
–
–
–
–
–
–
–
–
–
79-85
79-86
79-87
79-88
79-89
79-8A
79-8B
79-8C
79-8D
79-8E
–
–
79-A5
79-AF
79-AC
79-AD
–
79-A9
79-AB
79-AE
79-AA
Yamaha1
–
MD
–
79-A8
–
–
–
–
–
79-B5
–
–
–
–
–
–
–
–
–
–
–
–
79-8F
–
–
–
–
–
–
–
–
–
–
79-B7
79-B8
79-B9
79-BA
79-BB
79-BC
79-BD
79-BE
79-BF
79-C0
–
–
79-A5
79-B1
79-AC
79-AD
–
79-A9
79-AB
79-AE
79-AA
Yamaha2
–
–
79-A8
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7A-04
7A-01
7A-02
7A-06
–
7A-07
7A-40
7A-03
Yamaha1
–
TAPE
–
7A-00
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7A-1A
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7F-04
7F-01
7F-02
7F-06
–
7F-07
7F-08
7F-03
Yamaha2
–
–
7F-00
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7A-E5
7A-E6
7A-E7
7A-E8
7A-E9
7A-EA
7A-EB
7A-EC
–
–
–
7A-11
–
–
–
–
–
–
–
–
–
Yamaha1
–
–
–
–
–
–
7A-10
7A-12
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
D1-0E
D1-0F
D1-10
D1-11
D1-12
D1-13
D1-14
D1-15
–
–
D1-0D
7A-11
–
–
–
–
–
–
–
–
–
Yamaha2
–
TUNER
–
–
–
–
–
7A-10
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7A-97
7A-56
7A-86
–
–
–
–
–
–
–
–
7A-1C
7A-88
7A-89
7A-8A
7A-8B
7A-8C
7A-8D
7A-8E
7A-8F
7A-90
7A-96
7A-85
7A-99
7A-C2
–
–
–
–
–
–
–
–
FIX
–
AMP
–
–
7A-53
–
7A-52
7A-98
7A-9C
>
>
NC
VB2
VDD
VDD
VDD
+
X1
20
11
21
22
19
18
16
VDD
PA7
PA5
PA4
PA3
PA2
PA1
PA0
PB7
PB6
PB5
PB4
PB3
PB2
PC2
PB1
25
26
3
4
5
6
PA5
PA6
24
PA6
23
PA7
PA4
PA3
PA2
PA1
PA0
27
28
1
2
7
8
PB7
PB6
PB5
PB4
PB3
PB2
PC1
PC0
NC
14
13
PC1
15
9
PB0
10
VSS
OSC1
OSC2
RES
PC5
PC3
D1
VBAT
D2
D3
OPTION
OPTION
VB1
PB7
IC1
PF0
12
VB2
VBAT
VDD
BATT
AAA x 4
17
PC4
NC
K58
K59
K60
K61
K62
K63
K57
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
9
0/10
6
+10
7
ENTER
5
PB6
K50
K51
K52
K56
K53
K54
K55
K49
VCR 1
✩
D-TV/CBL
MULTI CH INPUT
✩✩
V-AUX
AMP
DVD
PB5
K42
K43
K44
K48
K45
K46
K47
K41
PAUSE
REW
AUDIO
FF
STOP
REC
PB4
K34
K35
K36
K40
K37
K38
K39
K33
TITLE
MENU
LEFT
DOWN
SELECT
RIGHT
UP
RETURN
PB3
K26
K27
K28
K32
K29
K30
K31
K25
TV VOL -
TV INPUT
TV VOL +
VOL +
CH -
CH +
VOL -
TV MUTE
PB2
K18
K19
K20
K24
K21
K22
K23
K17
1
2
MUTE
DISPLAY
3
PLAY
4
CODE SET
PC1
K10
K11
K12
K16
K13
K14
K15
K9
CD
MD/CD-R
AV POWER
SYS_POW
TUNER
STANDBY
SLEEP
TV POWER
D4
VB1
D5
VB2
K64
8
D6
C1
470
µ
C2
0.1
µ
C5
0.01
µ
C6
0.1
µ
Q3
KST3904
Q2
KST3904
100k
R13
R12
56k
R2
100k
R4
18k
R3
56k
R1
470k
R14
1M
R8
10
R9
10
Q1
8050D
R7
1K
R10
100
R6
1M
R5
220K
C7
0.01
µ
SKIP –
SKIP +
■
REMOTE CONTROL RAV250: RX-V550 (U, C, A, L, R, T, K models), HTR-5750, RX-V450/HTR-5740 (U, C, A, L, R, T, K models), DSP-AX450
RAV251: RX-V550 (B, G, E models)
●
SCHEMATIC DIAGRAM