Service manual
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
117
MAIN 2/2
RX-V665/HTR-6260
IC153
CB153
CB154
CB155
CB152
IC152 IC152
IC152 IC152
IC152
IC152
IC154
W3
CB156
IC154
00
5.1
0.2 0
5.1
0
0
5.1
2.62.2
5.1
4.7
0
00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-6.8
0
0
0
6.9
0
0.80.8
000
0
0.8
0.8
000
0
-6.8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6.9
2.6
2.2
4.7
5.1
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
0
0
11.4
0
0
0
0
-11.8
-12.1
0
0
-12.1
0
0
-12.1
0
0
-12.1
0
0
ANALOG IN
ANALOG IN
FRONT L
CENTER
SURROUND L
SURROUND
BACK L
SUBWOOFER
DIGITAL IN
IC154: NJM4565M
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
IC152: TC74VHCU04FT
Hex inverters
VCC
6A
5A
4A
6Y
5Y
4Y
GND
3Y
3A
2A
1A
2Y
1Y
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IC153: R2A15220FP
8-channel electronic volume with 11 input selector and tone control
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
80
81
79
MUTE
A VEE
ADCL
ADCR
AGND
INR1
INR2
INR3
INR4
INR5
INR6
INR7
INR8
INR9
INL1
INL2
INL3
INL4
INL5
INL6
INL7
INL8
INL9
INR12
INL12
INL14
RECR3
RECL3
INL11/RECL5
INR13
INR14
INL13
FLIN1
FRIN1
CIN1
SWIN1
SLIN1
SRIN1
SBLIN1
SBRIN1
SBLC
SBL Pre-OUT
SBL OUT
INRA/RECR1
INLA/RECL1
INRB/RECR2
INR10/RECR4
INR10/RECL4
INR11/RECR5
INLB/RECL2
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
1
2
FRC
FROUT
FLOUT
FLC
CC
COUT
SWOUT
SROUT
SLOUT
SBR OUT
SBR Pre-OUT
SL Pre-OUT
SR Pre-OUT
FL Pre-OUT
FR Pre-OUT
SBRC
SWC
SRC
SLC
AGND
AGND
A GND
AGND
AGND
TREL
TRER
BASSL2
BASSR1
BASSR2
BASSL1
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
50
AVEE
0/-6/-12/-18dB
AT T
SUB
SUB2
0~95dB,
-∞
(0.5dBstep)
MAIN
MAIN
MAIN
SUB
SUB
CLOCK
DATA
DGND
SUBR1
SUBL1
SBLCIN
SBRCIN
FRIN2
FLIN2
SRIN2
SLIN2
SWIN2
SBRIN2
SBLIN2
SLCIN
SRCIN
SUBR2
SUBL2
AVCC
CIN2
49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
MCU
I/F
AVCC
REC
Tone
Tone
Bass/Treble
-14~+14dB
(2dBstep)
+42~0dB
(0.5dBstep)
+42~0dB
(0.5dBstep)
+42~-95dB
-(0.5dBstep)
+42~-95dB
-∞(0.5dBstep)
+42~-95dB
-∞(0.5dBstep)
+42~-95dB
-∞(0.5dBstep)
+42~-95dB
-∞(0.5dBstep)
+42~-95dB
-∞(0.5dBstep)
Bass/Treble
-14~+14dB
(2dBstep)
0~-95dB,
-∞
(0.5dBstep)
Bypass
Bypass
Tone+MIX
Tone+MIX
Tone
Tone
ZONE2
OUT
AUDIO 2AUDIO 1AV OUTAV 6AV 5AV 1
OPTICAL
(TV)
OPTICALCOAXIAL COAXIAL
(CD)
AV 3AV 2 AV 4
AUDIO
OUT
MULTI CH INPUT PRE OUT
SUBWOOFER 2SUBWOOFER 1SUBWOOFERSURROUND BACK SURROUND BACKSURROUNDSURROUND FRONTFRONT
RLRLRL RLRLRL
CENTERCENTER
MAIN (1)
BUFFER
RX-V665, HTR-6260 (U model)
to DIGITAL_CB23
Page 110
E2
to OPERATION (2)_CB451
Page 115
B8
to OPERATION (2)_CB456
Page 115
D8
to OPERATION (2)_CB454
Page 115
C8
to OPERATION (2)_CB457
Page 115
E8