Yamaha RX-V771, Service Manual

Page: 114 / 148

A
1
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4
5
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8
9
10
B C D E F G H I J K L M N
115
OPERATION 1/2
RX-V771
● ⚠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あります。
★
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.
IC401
CB472
CB471
CB407
W4002
CB401
CB402
IC471
IC471
JK471
JK472
W4482
W4481
CB446
CB475 CB406
W4006
W4005
W4004
CB404 CB473
IC481
CB405 CB474
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
IC401 : 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
IC471 : NJM4565M (TE1)
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
V
DD
CE
Vref
4 3
1 2
Current Limit
V
OUT
GND
Pin No.
1
2
3
4
Symbol
V
OUT
GND
CE
V
DD
Description
Output Pin
Ground Pin
Chip Enable ("H" Active)
Input Pin
IC481 : RP130Q331D-TR-F
Voltage regulator
FL DRIVER
OPERATION (5)
OPERATION (1)
OPERATION (4)
OPERATION (6)
OPERATION (7)
OPERATION (3)
OPERATION (11)
OPERATION (12)
YPAO
MIC
MAIN ZONE
INPUT
VOLUME
PURE DIRECT
indicator
USB
iPod/iPhone
PHONES
SILENT CINEMA
VIDEO AUX
VIDEO
AUDIO
L
R
Remote control
sensor
POWER
indicator
to DIGITAL (1)_CB81
Page 111 K8
to DIGITAL (1)_CB902
Page 112 K8
to DIGITAL (1)_CB951
Page 114 M8
to VIDEO (1)_W3401
Page 120 B4
to OPERATION (2)_CB458
Page 116 K8
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm 0 + 1.0 k + 1.0 k + 1.5 k + 1.8 k + 2.2 k + 3.3 k + 4.7 k + 6.8 k + 10.0 k
V 0 – 0.15 0.16 – 0.42 0.43 – 0.70 0.71 – 0.99 1.00 – 1.27 1.28 – 1.56 1.57 – 1.86 1.87 – 2.14 2.15 – 2.39 2.40 – 2.65
A/D conversion value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 77 78 – 99 100 – 121 122 – 144 145 – 166 167 – 186 187 – 205
KEY2
(170 pin)
PURE DIRECT
TUNING
>>
TUNING
<<
AM FM
PRESET
>
PRESET
<
MEMORY INFO STRAIGHT
Ohm 0 + 1.0 k + 1.0 k + 1.5 k + 1.5 k + 2.2 k 22.0 k 33.0 k
V 0 – 0.15 0.15 – 0.42 0.43 – 0.70 0.71 – 0.97 0.98 – 1.24 1.25 – 1.53 2.23 – 2.62 2.63 – 3.04
A/D conversion value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 75 76 – 96 97 – 119 182 – 197 198 – 209
KEY1
(171 pin)
RADIO
(SCENE4)
CD
(SCENE3)
TV
(SCENE2)
BD/DVD
(SCENE1)
ZONE2
CONTROL
ZONE2
ON/OFF
MAIN ZONE
(power)
TONE
CONTROL