Yamaha AX-V765, Service Manual

Page: 118 / 156

A
1
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5
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8
9
10
B C D E F G H I J K L M N
RX-V765/HTR-6270/AX-V765
118
OPERATION 1/2
★
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.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● ⚠印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがございます。
CB401 CB402
CB403
CB404
JK471
W4405
W4404
W4408
CB476
IC401
IC401
JK401
IC402
JK472 W4407
CB475
CB477
JK472
CB474
-29.8 -29.8
-35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3
-35.2 -35.2 -35.2
-37.4 -33.2 -33.1 -33.1 -31.0 -33.0 -31.0 -33.1
-31.0 -29.8 -29.8
-33.1 -33.0 -33.0 -37.3 -33.0 -33.0 -33.0 -33.1 -33.1 -28.9 -32.5 -33.1 -31.0 -31.2 -33.1 -35.2 -35.2
-31.0
-35.2 -35.2 -35.2 -35.2 -35.2 -37.4
-35.1 -35.1
-28.9
-35.2
-35.3
-33.1
-33.0
3.4
-33.0
-37.3
-33.0
-33.1
-33.1
-33.0
-33.1
-31.0
3.4
3.2
3.4
3.3
-35.3
-35.2
-35.2
-35.2
3.4
3.3
2.0
-30.5
-34.1
-37.6
0
0
5.1
0
12.0
11.7
11.7
0
0
0
0
0
0
0
0
12.0
-11.9
0
0
0
0
0
0
0
0
0
0
0
0
0
5.0
2.9
2.9
3.4
-31.0
-31.0
3.4
-31.1
-31.0
3.4
-35.3
-35.1
3.4
-35.2
-35.1
2.0
0
0
12.0
12.0
0
0
12.0
0
0
0 0
0
3.4
-35.8
-35.2
3.4
-35.3
-35.2
1.6
0
3.2
1.6
-33.0
-35.2
-31.2
-35.2
-33.1
-35.2
-35.8
-35.3
-33.2
-35.2
-37.4
-28.9
-33.1
-35.2
-37.4
-35.2
-33.0
-35.2 -31.1 -31.0 -28.9 -31.0 -31.0 -35.3 -33.1 -35.2 -33.1 -32.5 -35.2
-35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -35.3 -37.7
3.3 3.3 0
0
0 0 0
0
3.4 3.4 3.4 3.4 3.4 3.4 0
-11.9 12.0 0 0 0 0
-37.7 3.3 0 0 -29.9 -29.9
0 0 0
0 3.4 5.0 3.3
3.3
3.3 3.3
0.2 4.9
3.3 3.3 3.3 3.3
0
-29.9
-29.9
0
0
3.3
-37.7
0
0
0
0
52
Display
controller
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51
DIG12/
SEG41
50
DIG13/
SEG40
49
DIG14/
SEG39
48
DIG15/
SEG38
47
DIG16/
SEG37
46
DIG17/
SEG36
45 SEG35
XOUT 6
Vcc1 8
Vcc2 18
Vss 5
Vp 64
XIN 7
CS
SCK 3
SDATA 4
RESET 1
SEG00 44
9 SEG34
SEG26 17
19 SEG25 Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35-bit x 166)
CGROM
(35-bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00 63
53 DIG10
IC402 : M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
2 data
timing
clock
dot data
write
scan pulse
Segment/
Digit
select/
output
circuit
IC401 : NJM4565M
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
AUDIO
VIDEO
PHONES
VOLUME
OPTIMIZER
MIC
SCENE
HDMI
THROUGH
indicator
PURE
DIRECT
indicator
VIDEO
AUX
PORTABLE
OPERATION (3)
OPERATION (7)
OPERATION (10)
OPERATION (6)
OPERATION (1)
MAIN ZONE ON/OFF
STANDBY/ON
BD/DVD
J model
U, C, R, T, K, A, B, G, E, F, L models
TV CD
INPUT
PROGRAM
(J model)
(U, C, R, T, K, A, B, G, E, F, L models)
to DIGITAL_CB20
Page 114 B2
to OPERATION (2)_CB461
Page 119 I5
to VIDEO (6)_CB333
Page 123 L7
to VIDEO (1)_W3401
Page 123 A3
Ohm 0 +1.0k +1.0k +1.5k +1.8k +2.2k +3.3k +4.7k +6.8k +10.0k +22.0k +68.0k
V 0 – 0.15 0.15 – 0.42 0.43 – 0.70 0.71 – 0.99 1.0 – 1.27 1.28 – 1.56 1.57 – 1.86 1.86 – 2.14 2.14 – 2.4 2.4 – 2.65 2.66 – 2.91 2.92 – 3.17
A/D value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 77 78 – 98 99 – 120 121 – 143 144 – 165 166 – 185 186 – 205 206 – 225 226 – 245
KEY2
(134 pin)
PURE
DIRECT
STRAIGHT /
EFFECT
INFO MEMORY
PRESET
<
PRESET
>
FM AM
TUNING
<
TUNING
>
— —
Ohm 0 +1.0k +1.0k +1.5k +1.5k +2.2k +3.3k +4.7k +22.0k +33.0k
V 0 – 0.15 0.15 – 0.42 0.43 – 0.70 0.71 – 0.97 0.98 – 1.24 1.25 – 1.53 1.54 – 1.84 1.84 – 2.1 2.34 – 2.55 2.55 – 2.97
A/D value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 75 76 – 95 96 – 118 119 – 142 143 – 162 181 – 197 198 – 229
KEY1
(133 pin)
SCENE
RADIO
SCENE
CD
SCENE
TV
SCENE
BD/DVD
ZONE2
ON/OFF
ZONE2
CONTROL
— —
MAIN ZONE
ON/OFF
TONE
CONTROL
Ohm 0 +1.0k +1.0k +1.5k +1.5k +2.2k +3.3k +4.7k +22.0k +33.0k
V 0 – 0.15 0.15 – 0.42 0.43 – 0.70 0.71 – 0.97 0.98 – 1.24 1.25 – 1.53 1.54 – 1.84 1.84 – 2.1 2.34 – 2.55 2.55 – 2.97
A/D value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 75 76 – 95 96 – 118 119 – 142 143 – 162 181 – 197 198 – 229
KEY1
(133 pin)
SCENE
RADIO
SCENE
CD
SCENE
TV
SCENE
BD/DVD
SLEEP MUTE — —
STANDBY/
ON
TONE
CONTROL
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
RX-V765/HTR-6270
AX-V765
Ohm 0 +1.0k +1.0k +1.5k +1.8k +2.2k +3.3k +4.7k +6.8k +10.0k +22.0k +68.0k
V 0 – 0.15 0.15 – 0.42 0.43 – 0.70 0.71 – 0.99 1.0 – 1.27 1.28 – 1.56 1.57 – 1.86 1.86 – 2.14 2.14 – 2.4 2.4 – 2.65 2.66 – 2.91 2.92 – 3.17
A/D value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 77 78 – 98 99 – 120 121 – 143 144 – 165 166 – 185 186 – 205 206 – 225 226 – 245
KEY2
(134 pin)
PURE
DIRECT
STRAIGHT /
EFFECT
INFO MEMORY
PRESET
<
PRESET
>
CATEGORY
<
FM
CATEGORY
>
AM
TUNING CH
<
TUNING CH
>
— —