A-Video - Yamaha RX-V3800 Service Manual

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A-VIDEO 1/2

1
J model
2
3
4
5
6
7
8
J model
9
IC203
0
0.1
5.1
0
5.1
0
5.1
10
D E F
Page 136 A5
to D-VIDEO_CB122
9.0
9.0
INPUT and LINE
0
9.0
0dB
0
SELECTOR
0
9.0 IC201
0
9.0
LINE
0.1
0
SELECTOR 0.1
0.4
0.4 0.1
0 0.1
0
0
A-1
0
9.0
5.0 0
5.1
5.0
0 0
6.3
0
2.1 0
0
FREQUENCY
COUNTER
IC201
3.7
4.5
4.5
4.5
3.7
4.3
IC201
3.7
4.3
4.5
4.4
4.4 3.7
IC201
4.4 3.7
4.5
4.5
4.4 3.7
3.5 3.0
3.5
3.5 4.9
-5.0
0
-5.0
0
-5.0
0
G H I
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to D-VIDEO_CB121
to A-VIDEO 2/2
3.0
2.5
5.1
2.5
1.7 1.4
0 5.1
1.7 1.4
0
1.7 1.4
5.1 5.1
2.6
0
2.5 0
3.0 2.6
2.5 0
to A-VIDEO 2/2
J K L
IC201: NJW1321FP1
Wide band video switch with I
Y/R IN1
Y/R IN2
Y/R IN3
Y/R IN4
Pb/G IN1
Pb/G IN2
Pb/G IN3
Pb/G IN4
Pr/B IN1
Pr/B IN2
Pr/B IN3
Pr/B IN4
PORT 0
PORT 1
PORT 2
PORT 3
V+
GND BIAS
VREF
IC202: TA1318AF
SYNC processor, frequency counter IC for TV component signals
DAC3 VD2-OUT
30 29
DAC3 INV
SW SW
TEST DAC3
DV2-OUT
SW
H/V-
FREQ
Counter
H/C-
SYNC
H-FREQ
DET SW
1 2
HD2-IN VD2-IN
IC203: NJM2581M
Video amplifier
VIN1 1
NEE1 2
VIN2 3
VEE2 4
VIN3 5
6
VEE3
PowerSave 7
IC204, 205: TC74HC4052AF
Analog multiplexer/demultiplexer
INH VCC
6 16
A LEVEL BINARY TO 1-OF-4
10
CONVERTER DECODER WITH INHIBIT
B 9
GND 8
VEE 7
0X
12 SW
1X 14 SW
2X 15
3X 11
0Y 1 SW
1Y SW
5
2Y 2
3Y
4
POINT A-1 Pin 9 of IC202 INHIBIT
0
0
0
0
1
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
# Schematic diagram is subject to change without notice.
M N
RX-V3800/DSP-AX3800
2
C bus
6dB Y/R OUT1
6dB Y/R OUT2 38 25
GND 39 24 Pb OUT2
Pr IN4 PORT0
V+ PORT1
Y IN3 Pr OUT2
6dB Pb/G OUT1 GND V+
Pb IN3 VREF
V+ DGND
Pr IN3
GND
6dB Pb/G OUT2
GND SDA
Y IN2 48 15 SCL
1 14
6dB Pr/B OUT1
6dB Pr/B OUT2
ADDRESS
SDA
SCL
2
I C BUS
AUX 0
AUX 1
AUX 2
AUX 3
DGND
VD1-OUT NC SYNC1-IN DAC1 SYNC2-IN Address SW SCL SDA NC HD2-OUT Digital GND NC HD1-OUT
28 27 26 25 24 23 22 21 20 19 18 17 16
2
INV SYNC DAC1 SYNC I CBUS INV INV
SW SEPA SW SEPA Decoder SW SW
DAC1
DV1-OUT HD2-OUT HD1-OUT
SW SW SW
V-Input V-FREQ
V C/D
SW SW
V-FREQ
V-SYNC DET SW
Clamp
CP
Pulse
DAC2 SW
DAC2 V HD
2 υ f
H
SW Integral Polarity
H-INPUT
H-AFC H C/D H-Ramp
SW
H-FREQ
HVCO
SW
3 4 5 6 7 8 9 10 11 12 13 14 15
HD1-IN VD1-IN Analog GND NC AFC Filter NC HVCO V NC CC DAC2 VD3-IN HD3-IN CP-OUT
6dB 75
14 V+1
AMP Driver
BIAS
13 VOUT1
6dB 75 V+2
AMP Driver 12
BIAS
11 VOUT2
6dB 75
10 V+3
AMP Driver
BIAS
9 VOUT3
REF 8 GND
IC207: NJM2566AV
6-channel video amplifier for DVD
V+ GND
S1
SDC SDC OUT
S2
6dB 75 ohms Driver
6.75MHz
SCIN SC OUT
LPF
BIAS
MIX 6dB 75 ohms Driver
X-COM
13 V OUT
SW
6.75MHz
VIN
SW LPF
CLAMP
6dB 75 ohms Driver
6.75MHz
SYIN SY OUT
LPF
3 Y-COM
SW CLAMP
6dB 75 ohms Driver
SW 13.5MHz
Y IN
Y OUT
LPF
CLAMP
30MHz
\ BIAS
LPF
B A
0 0 0x, 0y 6dB 75 ohms Driver
13.5MHz
Pb IN
0 1 1x, 1y Pb OUT
LPF
1 0 2x, 2y BIAS
30MHz
1 1 3x, 3y
LPF
X X NONE
6dB 75 ohms Driver
13.5MHz
Pr IN
Pr OUT
LPF
BIAS
30MHz
LPF
MIX CB LPF PS1 PS2
SW SW SW
with parts having specifications equal to those originally installed.
133