Yamaha RX-V2500 Service Manual page 81

A B C
SCHEMATIC DIAGRAM (CONTROL 2/2)
1
Page 74 C8
from FUNCTION (6) – V-CNCT –
CB502_11Pin
2
0 0 0
0 0 0
3
0 0 0
0 0 0
0 0 0
0 0 0
4
INPUT
SELECTOR
0 4.9
0 0
0 0
0
0
0 0
0 0
-4.9 0
0 0
5
0 4.9
0 0
0 0
0
0
0 0
0 0
-4.9 0
0 0
0 4.9
0 0
0 0
6
0 0
0 0
0 0
-4.9 0
0
0
7
8
IC601: TA1270BF
Sync Processing System
I 2 C GND
DAC2 Y OUT GND DAC TEST SDA SCL Ys R-Y1 IN B-Y1 IN Y1 IN
38 37 36 35 34 33 32 31 30 29 28
Y OFFSET DAC PEDESTAL
DAC2 I2C BUS Ys
SW TEST CLAMP
CONTROL
DAC1 39
DAC1
OFFSET
SW
SUB.
Y DL
CONTRAST
Y IN 40
9
PEDESTAL
CLAMP
SW
DAC Vcc 41
(5V)
fsc
Y DL
TRAP
C Vcc 42
(5V)
YUV → RGB
MATRIX
43
UV/CbCr SW SYSTEM
CW
TINT
MATRIX
fsc OUT 44 fsc
DEMO
1H DL
1HDL CONT 45
CONTROL P/N ID
CHROMA
SECAM LPF / fsc BLK NOSE
SECAM CONT 46
CONTROL TRAP DET
10
SW
B-Y/Cb OUT 47
CbCr / UV BPF TOF V
H. AFC
SW APC SEP
48
R-Y/Cr OUT
SYNC
SEP
VCX0
ACC
SUB
COLOR
1 2 3 4 5 6 7 8 9 10 11
4.43MHz M-X'tal 3.58MHz APC C GND C IN V-SEP SYNC SYNC H. AFC SYNC
X'tal X'tal IN OUT GND
D E F
SEPARATOR
0
3.0
2.5 0
0 3.0
1.5
1.5
0
0.1
0
0
0
-4.9
0
0
0
4.9
0 0
-4.9 5.1
0 0 5.0
0
0
1
4.9
2.6
2.6 2.6 2.6 0 0 0 0
2.6
2.6 2.5
0
0
-4.9
0 0 0
0
0 0 0
4.9
0
0 0
0
0 0
0
0 0
0 4.9
4.9 -4.9 0
0 4.9
-4.9 0
0 5.1 0 4.9
-4.9 5.1 -4.9
0
5.1 0
0
4.4
IC602: TA8772AN
Delay Syatem for Color TV or VCR
R-Y2 IN B-Y2 IN Y2 IN B-Y CLAMP B-Y FROM
R-Y OUT B-Y OUT DET. R-Y IN B-Y IN MODE SW2 MODE SW1 CCD
27 26 25
30 29 28 27 26 25 24 23
PEDESTAL
CLAMP
Clamp Clamp LPF
24 SW GND
x1 or x1/2 x1 or x1/2
AGC AGC
Pulse Pulse
HI : 2ch/LOW : 24h Det
Ins. Ins.
23 ADRS SW Pulse Pulse
Remove Remove
Clamp
AGC
22 R-V/R OUT Det
SW 21 B-Y/B OUT
SW
20
Y/G OUT
19 SW Vcc
(9V)
Pulse
HP. GP
18 SYNC Vcc
(9V)
1 2 3 4 5 6 7
CP/HP
17 CP/HP IN
IN R-Y CLAMP R-Y TO B-Y TO R-Y AGC VCC FILTER S.C.P. IN B-Y AGC
DET. CCD CCD DET. ADJ. DET.
16 Dig GND
H C/D V C/D
15
SCP SCP OUT
32fH
VCO
12 13 14
32fH VD OUT HD OUT
VCO
G H
4.9
4.9
4.3
4.9
4.9 2.2
1.4
1.9 2.2 4.3 0.9
1.2
1.4 1.5 0.9
3.1
0
0.1 -0.5
0.6
2.2 2.5
0 0
4.9 4.9
0 0.1
1.4 4.9
2.5
0.8 4.9
4.9 0.1
4.9 0
-4.9
4.9
2.5
4.9
4.9
1.8
4.3
1.4
0.9
0.8 0
-0.5
0
0
0.9
-4.9
0.6
5.0
0
0
0 0
0
0
4.9
-4.9
0
4.9
4.9 0
0 0
4.9
4.4
-1.4 4.9
4.9 4.4
-0.4 0 0
-0.4 0
9.1
0
-4.9
9.1
A-2 A-3
0
2.1
2.1
2.1
IC603: TC90A49F
3 Line Digital Y/C Separator
R-Y FROM
CCD GND VGG VOUT1 VDB1 VDB2 VOUT2
22 21 20 19 18 17 16
VERTICAL EDGE
REF REF
ENHANCEMENT CIRCUIT
LPF
LINE LINE
5
AIN ADC
MEMORY MEMORY
AGC
S/H S/H
CLAMP C-BPF C-BPF C-BPF
Clamp
4 fsc DYNAMIC COMB FILTER
CCD 1H CCD 1H
8 fsc
1/2
PLL
Ave
Bias
15 17
1/225 CKIN FIL
225fH
Det Clock
VCO
8 9 10 11 12 13 14 15
PLL CLOCK CLOCK IN VSS VIN1 VDD VIN2
DET.
I J K
POINT A-2 Pin 3 of IC601 POINT A-3 Pin 12 of IC601
1.4
0.6
O : USED / APPLICABLE
X : NOT USED
Key Input (A-D) Pull-Up Resistance 10 k-ohms
U, C, A models
O 0 + 1.2k + 1.2k + 1.8k + 2.7k + 3.3k + 4.7k + 8.2k + 18.0k + 47.0k
V ~ 0.27 ~ 0.75 ~ 1.22 ~ 1.76 ~ 2.28 ~ 2.76 ~ 3.24 ~ 3.76 ~ 4.26 ~ 4.75
PRESET/TUNING PRESET/TUNING PRESET/TUNING TUNING ZONE ON/OFF ZONE ON/OFF
KEY0 FM/AM MEMORY – –
< > EDIT MODE MAIN ZONE2
SPEAKERS SPEAKERS PURE TONE STRAIGHT
KEY1 – INPUT MODE A/B/C/D/E – –
A B DIRECT CONTROL EFFECT
R, T, K, L, J models
O 0 + 1.2k + 1.2k + 1.8k + 2.7k + 3.3k + 4.7k + 8.2k + 18.0k + 47.0k
V ~ 0.27 ~ 0.75 ~ 1.22 ~ 1.76 ~ 2.28 ~ 2.76 ~ 3.24 ~ 3.76 ~ 4.26 ~ 4.75
PRESET/TUNING PRESET/TUNING PRESET/TUNING TUNING
KEY0 FM/AM MEMORY – – – –
< > EDIT MODE
SPEAKERS SPEAKERS PURE TONE STRAIGHT
KEY1 – INPUT MODE A/B/C/D/E – –
A B DIRECT CONTROL EFFECT
B, G models
O 0 + 1.2k + 1.2k + 1.8k + 2.7k + 3.3k + 4.7k + 8.2k + 18.0k + 47.0k
V ~ 0.27 ~ 0.75 ~ 1.22 ~ 1.76 ~ 2.28 ~ 2.76 ~ 3.24 ~ 3.76 ~ 4.26 ~ 4.75
PRESET/TUNING PRESET/TUNING PRESET/TUNING TUNING RDS PTY PTY
KEY0 FM/AM MEMORY EON
< > EDIT MODE MODE MODE START
SPEAKERS SPEAKERS PURE TONE STRAIGHT
KEY1 – INPUT MODE A/B/C/D/E – –
A B DIRECT CONTROL EFFECT
IC604: BA7071F
Multimedia
ANALOG
THROUGH MODE SYNC
V 1 8 Sync-OUT
IN SEPA
COLOR
Vsepa
HD-OUT 2 7 VD-OUT
24
+ Y OUT
Y-LPF Y DAC
– GND 3 6 V CC
KILLER
PD
PD-OUT 4 5 HOSC-R
COMP VCO
20 C OUT
C-BPF Trap C-LPF C DAC
I 2 C BUS
11 12 13 14
SDA SCL TEST KILLER
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ 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.
L M N
RX-V2500/DSP-AX2500
IC606, 607, 611: TC74HC4053AF(EL)
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
A 11
LEVEL BINARY TO 1-OF-8
B 10
CONVERTER DECODER WITH INHIBIT
C 9
VSS 8
VEE 7
0X
12 SW
X-COM
14
1X 13 SW
0Y 2 SW
15 Y-COM
1Y 1 SW
0Z 5 SW
4 Z-COM
1Z 3 SW
INPUT STATES
"ON" CHANNNEL (S)
INHIBIT C B A
0 0 0 0 0X, 0Y, 0Z
0 0 0 1 1X, 0Y, 0Z
0 0 1 0 0X, 1Y, 0Z
0 0 1 1 1X, 1Y, 0Z
0 1 0 0 0X, 0Y, 1Z
0 1 0 1 1X, 0Y, 1Z
0 1 1 0 0X, 1Y, 1Z
0 1 1 1 1X, 1Y, 1Z
1 X X X NONE
IC608, 617: AD8056AR
OP-Amp
OUT 1 +V
1 8 S
–IN 1 2 7 OUT
+ – + –
+IN 3 6 –IN
1 2
–V 4 5 +IN
S 2
IC609: NJM2581M
Video Amp
6dB 75Ω
VIN1 1 14 V+1
AMP Driver
BIAS
NEE1 2 13 VOUT1
3 6dB 75Ω
VIN2 Driver 12 V+2
AMP
BIAS
VEE2 11 VOUT2
4
6dB 75Ω
VIN3 5 10 V+3
AMP Driver
BIAS
VEE3 6 9 VOUT3
PowerSave 7 REF 8 GND
IC612 - 614: TC74HC4052AF
Analog Multiplexer/Demultiplexer
INH VCC
6 16
A 10 LEVEL BINARY TO 1-OF-4
B CONVERTER DECODER WITH INHIBIT
9
GND 8
VEE 7
0X SW
12
1X 14 SW
13 X-COM
2X
15 SW
3X 11 SW
0Y 1 SW
1Y 5 SW
Y-COM
3
2Y 2 SW
3Y 4 SW
INHIBIT B A
0 0 0 0x, 0y
0 0 1 1x, 1y
0 1 0 2x, 2y
0 1 1 3x, 3y
1 X X NONE
IC615: TC74HCU04AFEL
Hex Inverters
1A 1 14 VCC
1Y 2 13 6A
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 9 4A
GND 7 8 4Y
81