Frequency Counter - Yamaha RX-V1800 Service Manual

A B C
A-VIDEO 1/2
1
J model
2
3
4
5
6
7
8
J model
9
IC203
0
0 -4.9
5.1
0 -4.9
5.1
0 -4.9
5.1
10
D E F
Page 132 A4
to D-VIDEO_CB122
8.9
8.9
INPUT & LINE
0
8.9
0dB
0
SELECTOR
0
8.9
IC201
0
8.9
LINE
0
0
SELECTOR
0.1
0.4
0.4 0.1
0 0.1
0
0
D-1
0 9.0
5.0 0
5.0
4.9
0 0
6.3
0
0
2.1
0
FREQUENCY
COUNTER
IC201
4.3
4.4
4.4
4.3
3.7
IC201
4.3
5.0
4.4 2.7
3.6
4.4 5.0
4.3 5.0
0
3.7
2.9
0
2.7
0
0
0
0
0
2.9
IC201 0
4.3 2.6
4.4 0
3.7
4.4
4.3
3.7
3.6 3.1
3.6
3.6 4.9
0
0
0
G H I
Page 132 A3
to D-VIDEO_CB121
to A-VIDEO 2/2
IC206
0
5.0
5.0
2.1
0
2.5
0
2.5
0
0
2.5
5.0
2.5
0
2.5
0
5.0
POINT D-1 Pin 9 of IC202
to A-VIDEO 2/2
J K L
IC201: NJW1321FP1
2
Wide band video switch with I C bus
Y/R IN1
6dB
Y/R IN2
Y/R IN3
Y/R IN4
6dB
Pb/G IN1
6dB
Pb/G IN2
Pb/G IN3
Pb/G IN4
6dB
Pr/B IN1
6dB
Pr/B IN2
Pr/B IN3
Pr/B IN4
6dB
PORT 0
PORT 1
PORT 2
I 2 C BUS
PORT 3
V+
GND BIAS
VREF
IC202: TA1318AF
SYNC processor, frequency counter IC for TV component signals
DAC3 D2-OUT VD1-OUT NC SYNC1-IN DAC1 SYNC2-IN Address SW
30 29 28 27 26 25
DAC3 INV INV SYNC DAC1
SW SW SW SEPA SW
TEST DAC3 DAC1
DV2-OUT DV1-OUT
SW SW
V-Input
SW
H/V-
V-FREQ
FREQ
Counter V-SYNC DET SW
DAC2
DAC2 V
H/
SYNC SW Integral
H-FREQ H-INPUT
DET SW SW
1 2 3 4 5 6
HD2-IN VD2-IN HD1-IN VD1-IN Analog GND NC AFC Filter
IC204, 205: TC74HC4052AF
Analog multiplexer/demultiplexer
INH VCC
6 16 INHIBIT B A
0 0 0 0x, 0y
BINARY TO 1-OF-4 0 0 1 1x, 1y
A 10 LEVEL
CONVERTER DECODER WITH INHIBIT 0 1 0 2x, 2y
B 9
0 1 1 3x, 3y
GND 8
1 X X NONE
VEE 7
0X 12 SW
1X 14 SW
13 X-COM
2X 15 SW
3X 11 SW
0Y 1 SW
1Y 5 SW
Y-COM
3
2Y SW
2
3Y
4 SW
IC206: MM74HC4053SJX
Triple 2-channel analog multiplexer
IN/OUT
VCC CY CX BY BX AY AX
16 3 5 1 2 13 12
Binary to
Logic
1 of 2 TG
Level OUT/IN
11 14
A Conversion Decoders
AX or AY
with TG
INHIBIT
Logic
Level TG
B 10 Binary to
OUT/IN
Conversion 1 of 2 15
BX or BY
Decoders
TG
with
Logic
INHIBIT
C 9 Level
TG
Conversion OUT/IN
4
Binary to CX or CY
1 of 2 TG
Logic Decoders
INH 6
Level with
Conversion INHIBIT
8 7
GND VEE
# 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.
M N
RX-V1800/HTR-6190/DSP-AX1800
Y/R OUT1
Y/R OUT2
38 25
39
GND 24 Pb OUT2
Pb/G OUT1
Pr IN4 PORT0
V+ PORT1
Y IN3 Pr OUT2
GND V+
Pb/G OUT2
Pb IN3 VREF
V+ DGND
Pr IN3
GND
GND SDA
Y IN2 48 15 SCL
Pr/B OUT1
1 14
Pr/B OUT2
ADDRESS
SDA
SCL
AUX 0
AUX 1
AUX 2
AUX 3
DGND
SCL SDA NC HD2-OUT Digital GND NC HD1-OUT
24 23 22 21 20 19 18 17 16
2
SYNC I CBUS INV INV
SEPA Decoder SW SW
HD2-OUT HD1-OUT
SW SW
V-FREQ
V C/D
SW
Clamp
CP
Pulse SW
HD
2 u f H
Polarity
H-AFC H C/D H-Ramp
H-FREQ
HVCO
SW
7 8 9 10 11 12 13 14 15
NC HVCO NC V DAC2 VD3-IN HD3-IN CP-OUT
CC
IC203: NJM2581M
Video amplifier
75
VIN1 1 6dB 14 V+1
AMP Driver
BIAS
NEE1 2 13 VOUT1
6dB 75
VIN2 3 Driver 12 V+2
AMP
BIAS
VEE2 VOUT2
4 11
6dB 75
VIN3 5 10 V+3
AMP Driver
BIAS
VEE3 6 9 VOUT3
PowerSave 7 REF GND
8
IC207: LA73054-TLM-E
Analog dual operational amplifier
1 36
2 35
CLAMP
2Step
LPF
Amp1
C_OFFSET
3 34
DC_CTL
4 75 ohms 33
DRIVER
5 32
2Step 75 ohms
6 LPF1 31
Amp2 DRIVER
7 Y/C 30
MIX
2Step
8 CLAMP LPF1 75 ohms 29
Amp3 DRIVER
9 28
SYNC
SEP
10 27
PEDESTAL
CLAMP LPF2
2Step 75 ohms
11 26
Amp4 DRIVER
CLAMP LPF1
12 25
13
24
LPF2
PEDESTAL 2Step 75 ohms
14 23
CLAMP Amp5 DRIVER
LPF1
15 22
LPF2
2Step
16 PEDESTAL 75 ohms 21
Amp5
CLAMP DRIVER
LPF1
17 VCC 20
18 REG 19
129