Yamaha DSP-AX1800, Service Manual

Page: 130 / 181

W2002
CB210
CB203
JK201
IC211
W2001
IC213
IC222
CB204
IC223
IC215
IC218
IC220
IC220
IC218
IC218
IC218
IC224
IC219
IC218
IC218
IC218
IC225
IC219
IC219
IC219
IC221
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
RX-V1800/HTR-6190/DSP-AX1800
130
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★
Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
A-VIDEO 2/2
0 5.0
0
0
0
0
0 4.9
0
0
0
1.6
0
4.6
4.6 5.0
5.0
4.9
4.9
4.6
0
0
5.0
3.6
3.6
4.9
4.9
4.9
0.1
0.1
4.9
2.5 2.5
2.5
2.5 2.5 2.5
0
0
0 5.0
5.0 0 0 0
0
0
0
0
0
0
0
0
0 4.9
4.3
4.3
1.7
-0.4
-0.4
0.3
0.9 0
0
0
0.9
0.9
0
0
2.4
2.5
4.9
2.4
2.5
4.9
0.1
5.0 1.7
5.0
5.0
0.5
-0.2
1.0
1.7
0
0.9
0.5
2.0
0
0
5.0
5.0
4.9
5.0
0
1.6
-0.6
-0.6
0.5
-1.0
5.0
0.9
0
0
0
0
0
0
5.0
-4.8
5.0
4.9
0.1
0.1
5.0
0
0
0
0
4.9
0.1
0.1
9.0
9.0
9.0
0.2
0.2
0.1
0.1
4.9
5.0
5.0
5.0
5.0
0
0
0
0
0.2
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-4.8
-4.8
-4.8
0
0
0
-4.7
0.1 3.6
0
0
-0.6
0
0
0
3.1
3.6
3.6
3.1 3.6
0
0
0
0
0
-4.7
-4.7
4.9
-0.6
5.0
-4.8
0
0
0
0 0
0
0
4.9
0
0
-0.6
0
0
3.6
0
3.6
3.6
0
0
3.6
3.6
3.6
0
0
0.7
0.7
5.0
0.7
0.5
0.5
4.9
4.9
4.9
0
0
0.5
0.1
0
0
-4.8
0.5
0
0
0
4.9
3.1
3.6
3.6
3.6
-4.7
4.9
0
-4.7
-4.7
4.9
A-2
4.7K
INPUT SELECTOR
SIGNAL DETECT
OSD IC
to A-VIDEO 1/2
to A-VIDEO 1/2
to OPERATION (3)_CB807
Page 126 E4
to FUNCTION (1)_CB410
Page 122 I9
to POWER (3)_CB23
Page 128 H5
to D-VIDEO_CB185
Page 135 L3
POINT A-2 Pin 3 of IC225
IC215 : CD4051BNSR
Single 8-channel multiplexer
CD4051B
11
10
9
6
A †
B †
C †
INH †
13 4 2 5 1 12 15 14
TG
TG
TG
TG
TG
TG
TG
TG
3
COMMON
OUT/IN
0 1 2 3 4 5 6 7
BINARY
TO
1 OF 8
DECODER
WITH
INHIBIT
LOGIC
LEVEL
CONVERSION
8 7
VSS VEE
16
VDD
CHANNEL IN/OUT
† All inputs are protected by standard CMOS protection network.
IC219 : LA7106M-TLM-E
Analog dual operational amplifier
15 VOUT1
13 VOUT2
11 VOUT3
10 MUTE2
9 -VCC2
12 DR CTL
16 +VCC
14 GND
2 NFB1
4 VIN2+
6 -VCC1
7 VIN3+
8 NFB3
5 NFB2
1 VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
IC218 : LA73050-TLM-E
6-channel 75-ohm video driver
IC222 : LC709004A-TLM-E
I/O-expander for microcontroller
Control logic
port 0 I/O buffer
Serial/parallel converter/shift register
I/O control/output register
DIN
VDD
DOUT
VSS
CLK#
CS#
RES#
P00 P07
2 14
15
19
3
4
21
24 17
port 1 I/O buffer
P10 P17
15 8
Serial 8-bits
latch
command
decoder
Horizontal
character
size
register
Horizontal
size
counter
+
parallel
converter
IC225 : LC74782JM-8A16-TLMC
The on-screen display controller LSI
RST
CTRL3
CTRL2
SEPIN
SYNIN
CVIN
CVOUT
SEPOUT
SEPC
VDD1
VDD1
NC
1
2
3
4
24
23
22
21
XtalIN
XtalOUT
CTAL1
BLANK
OSCIN
CHARA
SCLK
SIN
VDD2
CS
OSCOUT
VSS1
5
6
7
8
9
10
11
12
20
19
18
17
16
15
14
13
Vertical
character
size
register
Vertical
size
counter
Horizontal
display
position
register
Horizontal
character
size
register
Horizontal
dot counter
31 inking
3nd inversion
control
register
31 inking
3nd inversion
control
register
31 inking
3nd inversion
control
register
Character
control
counter
Timing generator
Line
control
counter
31 inking
3nd inversion
control
register
Vertical
display
position
register
Vertical
dot counter
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Display
control
register RAM write
address
counter
Display RAM
Decoder
Decoder
Font RAM
Shift
register Character output
control
Background control
Video output control
Synchronization
signal generator
13 15 5 2 4 21
22
20
19
18
17
3
7
6
12
24
23
10
11
9
1
8
IC211, 213 : MM74HC4051SJX
8-channel analog multiplexer
16
11
10
9
7
VEE
8
GND
C
B
A
VCC
4
Y7
1
Y4 Y5 Y6
12
Y3
2 5 15
Y2
CHANNEL IN/OUT
14
Y1
13
Y0
COMMON
OUT/IN
6 INH
Logic
Level
Conversion
Binary
to
1 of 8
Decoder
with
INHIBIT
TG
TG
TG
TG
TG
TG
TG
TG
3
IC221, 224 : MM74HC4053SJX
Triple 2-channel analog multiplexer
16
11
10
9
7
VEE
8
GND
C
B
A
VCC
5
CX CY
1
BY
3 2
BX
IN/OUT
13
AY
12
AX
6 INH
Logic
Level
Conversion
Binary to
1 of 2
Decoders
with
INHIBIT
Logic
Level
Conversion
Logic
Level
Conversion
Logic
Level
Conversion
Binary to
1 of 2
Decoders
with
INHIBIT
Binary to
1 of 2
Decoders
with
INHIBIT
TG
TG
TG
TG
TG
TG
OUT/IN
BX or BY
15
OUT/IN
CX or CY
4
OUT/IN
AX or AY
14
VCC
6A
5A
4A
6Y
5Y
4Y
A
L
H
H
L
Y
GND
3Y
3A
2A
1A
2Y
1Y
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IC223 : TC74VHCU04FT
Hex inverter
IC220 : TK15420M
Video amplifier
OUT A
1
2
3
4
8
7
6
5
–IN A
+IN A
VEE
VCC
OUT B
–IN B
+IN B
+ – + –