Yamaha RX-V661 Service Manual page 100

A B C
RX-V661/HTR-6060/DSP-AX761
VIDEO
1
Page 97 G6
Page 99 J9
to FUNCTION (5)_CB296
to MAIN (2)_W110
2
JK301
3
0
4.9
0
0.1
0
0
0
5.0
0
4
4.9
0
JK302
0
0
0
0
5.0
0
4.9
0
4.9
5
0 4.9
VIDEO/
S VIDEO
JK303
0
4.9
0
0
0
0
0
6
5.0
RECOUT AMP
4.9
0.1
IC308
0.1 IC308
4.9
4.9
0.1
IC308
7
0.1 IC309
0.1
IC309
0.1
0.1
0.1 IC309
0.1
OUTPUT AMP
8
9
IC301-303: TC74HC4051AFEL
8-channel analog multiplexer/demulitiplexer
A
B
C
INH
10
# All voltages are measured with a 10MΩ/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.
100
D E F
Page 95 K4 Page 93 D2 Page 96 B4
to DSP_CB88 to DSP_CB43 to FUNCTION (1)_CB202
INPUT
SELECTOR
0
-4.9
0
0
0
0
0
0.9
0 0
-4.9
0
-4.9
0
0
0
0
0.9
0.2
0
0
-4.9
0
IC308
0
0 0.6
0
IC308
-4.9
0
IC308
0
0
-4.9
0 0.6 0
0 0.6 -4.9
0 0.6 0
0 0.7 0.4
0 0.6 0.4
0 0.9
0.4
0.6 0.4
5.0
BYPASS
0
SWITCH
0
0
0
0 IC310
2.5 2.5
0
0
IC310
0
0 0
0
0
0
0
5.0
S-DETECTOR
0
0
IC309 IC308
IC304: MM74HC4053SJX
Triple 2-channel analog multiplexer
IN/OUT
VCC CY CX BY
COM 16 3 5 1
OUT C IN 0
Binary to
1 Logic
1 of 2
Level
4 1 16 Vcc A 11 Conversion Decoders
2
with
6 2 15 2
INHIBIT
3 Logic
COM 3 14 1
Level
B 10 Binary to
4 7 4 13 0 Conversion
1 of 2
5 5 12 3 Decoders
5 with
Logic
INH 6 11 A INHIBIT
C 9 Level
6
V EE 7 10 B Conversion
Binary to
OUT C IN 7 GND 8 9 C 1 of 2
Logic Decoders
INH 6 Level
with
Conversion
INHIBIT
8 7
GND VEE
G H
4.9 3.3 4.9 1.8
IC306 IC307
4.9 3.3 4.9 1.8
0 0
0
0.7
0.1
DECODER
0
1.1
0.6
1.8
0
0.3
OSD
0.1
0.2
5.0
1.5
-4.9
IC305
0 0
4.9 4.9
5.0 4.9
0.4
0
4.9
0.4
0.4
2.5
0 3.3
2.5 0 2.4
0.4
IC309
0 5.0
0
0.4
3.3
0.2
5.9
2.1
0 0
0.4
0
IC309
0 5.0
0
0.2
IC309
0
5.0
0
OUTPUT AMP
IC312: ADV7172KSTZ
Digital PAL/NTSC video encoder
CSO_HSO VSO CLAMP ALSB
CLOCK PAL NTSC SCLOCK SDATA
BX AY AX
2 13 12 HSYNC
FIELD/ 2
VIDEO TIMING I C MPU PORT
VSYNC GENERATOR
TG BLANK
OUT/IN
14
AX or AY
TG
RESET
TG TTX
OUT/IN TELETEXT
15
BX or BY TTXREQ INSERTION BLOCK
TG
V
AA BRIGHTNESS AND LUMA
TG CONTRAST CONTROL PROGRAMMABLE
10
OUT/IN + FILTER
4
CX or CY ADD SYNC +
TG 8 Y 8
+ SHARPNESS
INTERPOLATOR FILTER
P0
4:2:2 TO YCrCb
4:4:4 8 TO U
COLOR 10
YUV SATURATION CONTROL
DATA INTER-
MATRIX 8 + PROGRAMMABLE
POLATOR
ADD BURST CHROMA
10
P7 +
8 V 8 FILTER
INTERPOLATOR
REAL-TIME
ADV7172/ADV7173
CONTROL CIRCUIT
SCRESET/RTC GND
I J K
3.3
4.5 3.0
3.3
4.5 3.0
3.3
4.9 3.3
4.9 3.3
3.3
3.3
A/D
3.3
0.6
3.3
0
3.1
IC311
0.8
0.1
0.1
0.1
3.3
0
3.3
3.3
0
A/D 3.3
3.1
3.3
1.6
ENCODER
0.1
0.1
IC312
1.6
0
0.1
3.3
0.1
0.1
0.8
3.3
VIDEO
M
10 10
YUV TO U 10-BIT
DAC A
L DAC 48 47 46 45 44 43 42 41 40 39 38 37
RBG
T
MATRIX
10 I 10
+ 10-BIT V 1
DAC B AA 36 COMP1
YUV P DAC PIN 1
L P0 2 IDENTIFIER 35 DAC A
LEVEL
10 E 10
CONTROL 10-BIT P1 3
X DAC C 34 V AA
BLOCK DAC
E P2 4 33 DAC B
R
V P3 5 32 V AA
DAC REF
ADV7172/ADV7173
CONTROL R P4 6 31
SET2 GND
M BLOCK
TOP VIEW
U COMP2 P5 7 30 V
(Not to Scale) AA
L P6 8
10 10-BIT 29 DAC C
T
DAC E
10 I DAC P7 9 28 DAC D
P
CSO_HSO 10
MODULATOR L 10 10-BIT 27 V AA
10
+ DAC F
E DAC V 11 26 GND
AA
HUE X
CONTROL 10 E 10 10-BIT GND 12 25 DAC E
R DAC D
DAC
13 14 15 16 17 18 19 20 21 22 23 24
10 10
SIN/COS DAC
CONTROL R
DDS BLOCK SET1
BLOCK
COMP1
L M N
IC305: LC74782JM-8A16-TLM
The on-screen display controller LSI
9 Serial 8-bits
latch
11 parallel +
command
converter
10 decoder Horizontal Vertical Horizontal Vertical 31 inking Display RAM write
character display
character display 3nd inversion control address
size size position position control
register counter
register register register register register
23 Vertical 31 inking
Horizontal
size size Horizontal Vertical 3nd inversion Display RAM
dot counter
counter counter dot counter control
register
24
31 inking 31 inking
3nd inversion 3nd inversion
1 control control
register register
12
Character Line Decoder
8
control control
counter counter
Horizontal
character
size Font RAM
Horizontal register
6
character
size
7 register
Character output Shift
Timing generator Synchronization
control register
signal generator Background control
17
Horizontal Horizontal Video output control
character character
18
size size
register
19 register
20
22
21 4 2 3 5 15 13
VSS1 1 24 VDD1
Xtal 2 23 RST
IN
Xtal OUT 3 22 CTRL3
CTAL1 4 21 CTRL2
BLANK 5 20 SEP
IN
OSCIN 6 19 SEP OUT
OSC 7 18
OUT SEPC
CHARA 8 17 SYN IN
CS 9 16 VDD1
SCLK 10 15 CV IN
SIN 11 14 NC
VDD2 12 13 CV OUT
IC311: ADV7180BSTZ
10-bit, 4 x oversampling SDTV video decoder
CLOCKPROCESSINGBLOCK
XTAL1
LLC
XTA L PLL ADLLTPR OCESSING
16-BIT
PIXELDATA
DIGITAL
10-BIT,86MHz
PROCESSING
ADC P15TOP0
BLOCK
A IN 1 AA
A 2 FILT ER
IN 2DCOMB
HS
ANALOG
A 3 AA
VIDEO IN SHA A/D
VS
INPUTS FILT ER VBISLICER
A IN 4
FIELD
A 5 AA
IN
COLOR GPO0TO GPO3
FILT ER
A IN 6 DEMOD
SFL
INTRQ
REFERENCE I 2 C/CONTROL
SCLK SDATA ALSB RESET PWRDWN
IC308, 309: LA73050-TLM-E
6-channel 75-ohm video driver
IC306: NJM2885DL1-33
Low dropout voltage regulator
V IN 1 3 V OUT
Thermal
Protection
Bandgap
Reference
2
GND
IC307: NJM2885DL1-18
Low dropout voltage regulator
IC310: TC74VHCU04FT
Hex inverters
V IN 1 3 V OUT
Thermal
1A 1 14 VCC
Protection
Bandgap 2 13 6A
1Y
Reference
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 9 4A
GND 2
GND 7 8 4Y