Yamaha HTR-6280, Service Manual

Page: 128 / 166

A
1 2 3 4 5 6 7 8 9
10
BCD
E
F
G
H
I
J
K
L
M
N
RX-V1065/HTR-6280/AX-V1065
128
VIDEO 1/3
★
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。
IC308
IC307
IC306
IC303 IC303 IC303
IC303 IC302 IC301
IC301
IC301
CB301
IC305
IC305
IC301
IC302
IC302
IC302
CB305
CB304 CB303
IC304
IC310
IC309
CB302
W3001
IC310 IC310
IC305
IC305
IC305
IC305
IC305
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 5.0
4.8 0 0 0 0 -4.8 5.0
5.0 5.0 5.0
0 0 0
0 0 0 5.0 5.0 5.0
0
-4.8
0
0
0 0
-4.8
0 0
-4.8
0
0
0 0
0 0
0
0 0
0
0 0
0
5.0
0 0
0
0 0
0
0
0 0
0
0 0
0 0
5.0
0
0
0
4.9
0
0
-4.7
0
0
4.9
4.9
-4.7
-4.7
-4.7
4.9
0
0
0
4.9
0
0
0
4.9
-4.8
0
0
0
0
5.0
5.0
5.0
5.0
0
0
0
0
0
0
0
0
0
5.0 5.0 3.4 3.4
0 0 0 0 0 0
0.6
0 0 0 0 0 0 0 0
4.9
0 0
0 0
0
-4.8
-0.3
-0.9
0 5.0 4.8 0 0 5.0 5.0
5.0
0 0 0
0
0 0
0 0
-4.8
0 0 0 0 0
0 0
5.0
0 0
5.0
0 0
0
0 -4.8 -4.8 0 -4.8
0
0
0
5.0 5.0 5.0
0 0
5.0 5.0 5.0
0
3.4
3.4 5.0 0.6 5.0
IC310
: FHP3350IM14X
Triple voltage feedback amplifier
1 2 3 4 5 6 7
8 14 13 12 11 10 9
NC or DISABLE1 NC or DISABLE2 NC or DISABLE3
+Vs
+IN1 -IN1
OUT1
OUT3 OUT2 -IN3 +IN3 +IN2 -IN2 -Vs
IC305
: LA73050-TLM-E
6-channel 75 ohms video driver
IC308
: LC709004A-TLM-E
I/O-expander for microcontroller
Contr ol logic
por
t 0 I/O b
u
ffer
Ser
ial/par
allel con
ve
rt
er/shif
t r
egist
er
I/O contr
ol/output r
egist
er
DIN
VDD DOUT VSS
CLK#
CS#
RES#
P00
P07
2
14 15 19
3 4
21
24
17
por
t 1 I/O b
u
ffer
P10
P17
15
8
IC306
: NJM2581M
Video amplifier
13
VOUT1
11
VOUT2
9
VOUT3
8
GND
10
V+3
14
V+1
12
V+2
2
NEE1
4
VEE2
6
VEE3
7
PowerSave
5
VIN3
1
VIN1
3
VIN2
75 Driver
6dB AMP
BIAS
75 Driver
6dB AMP
BIAS
75 Driver
6dB AMP
BIAS
REF
41 62
COM
3
74 55
INH
6
V
EE
7
GND
8
Vcc
16
2
15
1
14
0
13
3
12
A
11
B
10
C
9
IC307
: TC74HC4051AFEL
8-channel analog multiplexer/demulitiplexer
Logic Level Converter
OUT
C
IN
OUT
C
IN
A B C
INH
COM
0 1 2 3 4 5 6 7
IC301-303
: TC74HC4053AF
Analog multiplexer/demultiplexer
INPUT S
T
A
TES
INHIBI
T
0 0 0 0 0 0 0 0 1
"ON" CHANNEL (S)
0X, 0Y
, 0Z
1X, 0Y
, 0Z
0X, 1Y
, 0Z
1X, 1Y
, 0Z
0X, 0Y
, 1Z
1X, 0Y
, 1Z
0X, 1Y
, 1Z
1X, 1Y
, 1Z
NONE
C 0 0 0 0 1 1 1 1 X
B 0 0 1 1 0 0 1 1 X
A 0 1 0 1 0 1 0 1 X
BINAR
Y
T
O
1
-OF
-8
DECODER WI
TH
INHIBI
T
LEVEL
CONVER
TER
VC
C
INHIBI
T
A B C
GND
VEE
0X 1X 0Y 1Y 0Z
X-COM Z-COM Y
-COM
SW
SW
SW
SW
SW
SW
11
61
6
10
9 8 7
12 13
2 5 3 1
14 15 4
VIDEO IN
COMPONENT
VIDEO IN
VIDEO (1)
AV 2 AV 1 AV 3 AV 4 AV 5 AV 6
AV OUT
MONITOR
OUT
COMPONENT
VIDEO
VIDEO
OUTPUT
SELECTOR
OUTPUT AMP
VIDEO
INPUT SELECTOR
EXTERNAL I/O PORT
COMPONENT
INPUT SELECTOR
to DIGITAL_CB71
P
age 123
H2
to OPERATION (2)_CB459
P
age 125
G7
to VIDEO (1)_CB354
(J model)
P
age 130
H6