Yamaha RX-V681 Service Manual page 118

A B C
RX-V681/RX-A760
1
OPERATION 1/3
1 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2
2
3
Q 3 0 0 1 Q 3 0 0 2 Q 3 0 0 3 Q 3 0 0 4 Q 3 0 0 6
4
3.294V
+ 3 . 3 M
5
P S W _ D E T
R 3 0 1 0 R 3 0 1 4 R 3 0 1 8 R 3 0 2 2
K E Y 1
1 K 1 K 1 . 5 K 1 . 5 K
F G 1
6
D G N D
K E Y 2 R 3 0 0 7 R 3 0 1 1 R 3 0 1 5 R 3 0 1 9 R 3 0 2 3
1 K 1 K 1 . 5 K 1 . 8 K 2 . 2 K
T U N I N G A M F M
7
R 3 0 0 5 R 3 0 1 2
J K 3 0 1
1 K 1 K
C 3 0 0 3
R 3 0 1 3
YPAO
2 2 0
1 0 / 1 6
MIC R 3 0 0 4 R 3 0 2 0
M S J - 2 2 0 0 C _ A G
4 . 7 K
4 . 7 K
N J M 4 5 6 5 M V +
3
I C 3 0 3
2
O P E ( 6 )
R 3 0 2 4
1 2 K
N J M 4 5 6 5 M
C 3 0 0 9
5
7
I C 3 0 3 3 3 P ( C H )
6
V -
8
L = 8 5 m m
to chassis
S R A - 2 1 T - 3 / 5 2 9 8 T
F G 2
OPERATION (6)
9
N O T I C E R E S I S T O R
( m o d e l )
R E M A R K S P A R T S N A M E
J J A P A N
U U . S . A N O M A R K C A R B O N F I L M R E S I S T O R ( P = 5 )
C C A N A D A C A R B O N F I L M R E S I S T O R ( P = 1 0 )
M E T A L O X I D E F I L M R E S I S T O R
R G E N E R A L
★ All voltages are measured with a 10M Ω /V DC electronic voltmeter.
T C H I N A M E T A L F I L M R E S I S T O R
K K O R E A M E T A L P L A T E R E S I S T O R ★ Components having special characteristics are marked ⚠ and must be replaced
F I R E P R O O F C A R B O N F I L M R E S I S T O R
A A U S T R A L I A
B B R I T I S H C E M E N T M O L D E D R E S I S T O R
★ Schematic diagram is subject to change without notice.
G S T A N D A R D S E M I V A R I A B L E R E S I S T O R
C H I P R E S I S T O R
L S I N G A P O R E
E S O U T H E U R O P E
C A P A C I T O R
V T A I W A N
R E M A R K S P A R T S N A M E
F R U S S I A N
Details of colored lines
N O M A R K E L E C T R O L Y T I C C A P A C I T O R
P L A T I N A M E R I C A
T A N T A L U M C A P A C I T O R
S B R A Z I L
10 N O M A R K C E R A M I C C A P A C I T O R
H T H A I
C E R A M I C T U B U L A R C A P A C I T O R
P O L Y E S T E R F I L M C A P A C I T O R
P O L Y S T Y R E N E F I L M C A P A C I T O R
M I C A C A P A C I T O R
P P O L Y P R O P Y L E N E F I L M C A P A C I T O R
S E M I C O N D U C T I V E C E R A M I C C A P A C I T O R
P O L Y P H E N Y L E N E S U L F I D E F I L M
S
C A P A C I T O R
118
D E F
V 3 0 1 0 2 0 M T 0 0 8 G N K
2 3 2 4 2 9 3 0 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 0 6 1 6 2 6 3 6 4 6 5
+ V P
38.86V
2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
2 1 8 0
D G
P 1 9
2 2
7 9
P 2 0 L G
2 3
7 8
P 2 1 V D D
2 4 7 7
C 3 0 2 4
P 2 2 O S C 1
FL DRIVER
2 5 7 6
P 2 3 O S C 0 3 3 P ( C H )
2 6 7 5
X L 3 0 1
C 3 0 2 5
P 2 4 I S Y N C 4 . 0 0 0 M H Z
2 7 7 4
P 2 5 D M Y - G N D 3 3 P ( C H )
2 8 7 3
P 2 6 M / S
2 9 7 2
P 2 7 D M Y - V D D
3 0 7 1
Q 3 0 0 7
D O
P 2 8 M L 9 2 8 6 - 0 3 G A Z 0 A R
3 1 7 0
P 2 9 / R E S E T
3 2 I C 3 0 1
6 9
P 3 0 / C P
3 3 6 8
P 3 1 D A
3 4 6 7
P 3 2 / C S
3 5 6 6
S Y N C O
P 3 3
3 6 6 5
P 3 4 X O U T
3 7
6 4
P 3 5 V D D
3 8 6 3
G 2 0 L G
3 9
6 2
G 1 9
D G
4 0 6 1
4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 0
3.294V
+ 3 . 3 M R P M 7 2 3 8 - H 9 R
Remote control
R 3 0 4 8
U 3 0 1
1 0 K
D 3 0 0 5
S I R - 5 0 5 S T A 4 7
R 3 0 5 0
T O N E
I N P U T
C O N T R O L 4 7
R 3 0 2 6 R 3 0 3 4 R 3 0 3 7
2 . 2 K 3 . 3 K 4 . 7 K
D G N D
C 3 0 1 7
F G 1
1 0 0 0 P
R 3 0 2 7 R 3 0 2 8 R 3 0 3 1 R 3 0 3 3 R 3 0 3 8 R 3 0 4 4
W 3 0 2 F G 1
3 . 3 K 4 . 7 K 6 . 8 K 1 0 K 2 2 K 6 8 K
n o _ u s e
P R E S E T M E M O R Y I N F O P R O G R A M
C o u n t e r m e a s u r e s o f D i s c h a r g e t e s t .
+ 1 2 V - 1 2 V
W 3 0 3
C B 3 0 1 C B 3 0 2
M F 0 0 5 1 2
+ 1 2 V + 1 2 V
12.151V
M I C M I C M I C
0V
E E
0V
- 1 2 V - 1 2 V
-12.061V
M I C _ N _ D E T M I C _ N _ D E T M I C _ N _ D E T
3.215V
P S W _ D E T P S W _ D E T P S W _ D E T
Standby indicator
3.285V
R 3 0 2 5 H D _ L E D H D _ L E D
C 3 0 1 4
1
0V
+ 3 . 3 M + 3 . 3 M
8 . 2 K 1 0 / 1 6
3.279V
D G N D D G N D
0V C 3 0 3 1
F G F G
0V
1 0 0 0 P ( B )
C 3 0 3 2
1 0 0 0 P ( B )
F G 2
F G 1
MAIN ZONE
Q 3 0 0 5
E
D T C 0 1 4 E U B T L
D G N D
IC303: NJM4565M (TE1)
Dual operational amplifier
V+
with parts having specifications equal to those originally installed.
8
2, 6
–INPUT
+INPUT
3, 5
Red / full line: Power supply (+)
Red /dashed line: Power supply (-)
Orange: Signal detect V–
4
Yellow: Clock
Green: Protection detect
Brown: Reset signal
Blue: Panel key input
G H
RX-V681
VOLUME
AC 5.691Vrms
F 1 F 2
E C 1 2 E 2 4 6 0 8 1 4
M A I N V O L U M E n o _ u s e
6 9 W 3 0 6
S W 3 2 3
B C O M A
R 3 0 6 2
4 7 K
R 3 0 6 1
+ 3 . 3 F L D
4 7 K
3.314V
+ 3 . 3 M
W 3 0 5
C B 3 0 4 C B 3 0 5
M F 0 0 9 1 0
3.295V
V O L _ R A V O L _ R A
0V
V O L _ R B V O L _ R B
0V
K E Y 2 K E Y 2
3.298V
P D _ L E D P D _ L E D
0V
+ 5 . 6 + 5 . 6
5.533V
D G N D D G N D
0V
F G F G
0V
F G F G
0V
5 1 0 4 8 5 1 0 4 8
F G 3 PURE
DIRECT
Q 3 0 1 4
D T C 0 1 4 E U B T L
O P E ( 5 )
OPERATION (5)
SILENT CINEMA
D G N D
sensor
5.514V
+ 5 . 6
Q 3 0 1 1 2 N 5 5 5 1 C - A T / P
R A L 0 3 5 P 0 1 D 3 0 1 4 Q 3 0 1 5
L 3 0 1 R 3 0 7 3
4 5 6 1 . 0
1 0 0 U H 1 S S 3 5 5 V M
D 3 0 1 6
S C 5 9 6 4 - T D - E
T 3 0 1
Q 3 0 1 2
2 1 0
1 S S 3 5 5 V M
3 2 1 R 3 0 7 4
3 1
D 3 0 1 5
4 . 7 K
4 7
Q 3 0 1 0 1 S S 3 5 5 V M
6 8
D 3 0 1 7
5 9
1 S S 3 5 5 V M
Q 3 0 1 3
S C 5 9 6 4 - T D - E Z J 3 7 5 6 0
D T C 0 1 4 E U B T L
F 2 F 1
AC 5.694Vrms D C - D C / A C C o n v e r t e r f o r V F D
D G N D
+ 3 . 3 F L D
+ 5 . 6
+ 3 . 3 F L D
5.542V 3.314V
I C 3 0 2
R P 1 3 0 Q 3 3 1 D - T R - F
4 3
Y C 2 8 8 A 0
1 2
+ 3 . 3 M
+ 5 . 6
D G N D
C 3 0 4 0
0 . 1 / 1 6
C 3 0 4 6
0 . 1 / 1 6
E
+ V P
C 3 0 5 1
C 3 0 4 2
n o _ u s e
J 3 0 0 2
C 3 0 3 9 1 0 0 0 P
n o _ u s e
1 0 0 P ( S L )
C 3 0 4 3
1 0 0 P ( S L ) C 3 0 5 2
R 3 0 5 5 1 0 0 0 P
1 0 0 K
E
F G 1
t o D i g i t a l
Page 114 K9
to DIGITAL (1)_CB82
IC302: RP130Q331D-TR-F
Voltage regulator
V V
DD 4 3 OUT
OUTPUT
1, 7
Vref
Current Limit
CE 1 2 GND
Pin No. Symbol Description
1 CE Chip Enable ("H" Active)
2 GND Ground Pin
3 V Output Pin
OUT
4 V Input Pin
DD
I J K
3 0 0 1 - 3 4 0 0
3 0 1 - 3 4 0
PURE DIRECT
indicator
OPERATION (7)
to chassis
O P E ( 7 )
W 3 0 7
S T 3 0 1 C B 3 0 8
H P _ N _ D E T
R 3 0 7 5 3.273V
J K 3 0 2 R 3 0 8 0
H P L
0V
1 K 1 K
t o M A I N
3 3 0 0 P / 1 0 0 H P E
0V
PHONES L
H P R
R 0V
3 3 0 0 P / 1 0 0 F r o m
P H L
V I D E O ( 1 )
G N D
H e a d P h o n e
38.87V O P E ( 1 )
+ V P
OPERATION (1)
Q 3 0 1 7
C 4 4 8 8 ( S / T )
Q 3 0 1 6
D T C 0 1 4 E U B T L
R 3 0 4 2
3 3 K
U S B S C N - X H
G N D
0V
G N D
0V
to DIGITAL (1)_CB941
V B u s
5.169V
V B u s
D G N D 5.169V
W 3 0 9
C 3 0 6 0
1 0 0 0 P ( B )
S A N - P H
F G
0V
G N D
0V
+ D a t a
0V
to DIGITAL (1)_CB951
USB jack C 3 0 5 8 - D a t a
0V
1 0 / 1 0
V B u s
5.169V
C 3 0 5 9
W 3 1 0
1 0 0 P ( S L )
F G 3
+ 1 2 V - 1 2 V
t o O P E ( 2 )
Page 119 F1
to OPERATION (2)_CB343
Key detection for A/D port
Key input (A/D) pull-up resistance: 10 k-ohms
0 Ω + 1.0 kΩ + 1.0 kΩ + 1.5 kΩ + 1.5 kΩ
Detected voltage value
0 – 0.15 V 0.15 – 0.42 V 0.43 – 0.70 V 0.71 – 0.97 V 0.98 – 1.24 V
at 91 pin
A/D value
0 – 11 12 – 32 33 – 54 55 – 75 76 – 95
(3.3 V=255)
RADIO NET TV BD/DVD
KEY1
(SCENE4) (SCENE3) (SCENE2) (SCENE1) CONTROL
0 Ω + 1.0 kΩ + 1.0 kΩ + 1.5 kΩ + 1.8 kΩ
Detected voltage value
0 – 0.15 V 0.15 – 0.42 V 0.43 – 0.70 V 0.71 – 0.99 V 1.00 – 1.27 V
at 92 pin
A/D value
0 – 11 12 – 32 33 – 54 55 – 77 78 – 98
(3.3 V=255)
PURE TUNING TUNING
KEY2 AM
DIRECT >> <<
L M N
IC301: ML9286-03GAZ0ARL
VFD controller/driver
V
DISP
V
DD
D-GND
SEG1
DCRAM CGRAM
L-GND
24w x 8b 240w x 35b
Segment
Driver
CGRAM
16w x 35b
RESET
SEG35
DA
8-bit
Shift
CP
Register
ADRAM AD1
CS
AD
24w x 2b
Driver
AD2
CGRAM
24w x 20b
Address
Selector
Command
Decoder
Write Read
Address Address
Counter Counter
Control
DO
Circuit
COM1
Digit
Control
Grid
Driver
Duty
Control
COM20
Timing Timing
SYNCO
Generator 1 Generator 2
OSC0
XOUT
Oscillator
OSC1
M/S
SYNCI
Page 124 H1
to MAIN (1)_W106
Page 117 B8
Page 115 B7
+ 2.2 kΩ + 3.3 kΩ + 4.7 kΩ 22 kΩ 33 kΩ
1.25 – 1.53 V 1.54 – 1.84 V 1.85 – 2.22 V 2.23 – 2.62 V 2.63 – 3.04 V
96 – 118 119 – 142 143 – 162 178 – 197 198 – 229
INPUT > INPUT <
ZONE MAIN ZONE z TONE
ZONE2
(power) CONTROL
(RX-V681 models)
+ 2.2 kΩ + 3.3 kΩ + 4.7 kΩ + 6.8 kΩ + 10 kΩ + 22 kΩ + 68 kΩ
1.28 – 1.56 V 1.57 – 1.86 V 1.87 – 2.14 V 2.15 – 2.39 V 2.40 – 2.65 V 2.66 – 2.91 V 2.92 – 3.17 V
99 – 120 121 – 143 144 – 165 166 – 185 186 – 205 206 – 225 226 – 245
PRESET PRESET PROGRAM PROGRAM
FM MEMORY INFO STRAIGHT
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