Yamaha RX-V350, Service Manual

Page: 35 / 53

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-V350/HTR-5730
SCHEMATIC DIAGRAM (MAIN 2/2)
56
★
All voltages are measured with a 10M
Ω
/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.
FREQUENCY STEP
INPUT
SELECTOR
MUTE
CONTROL
RDS
DECODER
MICRO COMPUTER
POWER DETECTOR
& RESET
LEVEL
SHIFT
P
age 54
to FUNCTION (4)
H7
P
age 52
to DSP
G1
IC241: LC72722PM
RDS Signal Processor
REFERENCE
VOLTAGE
57 kHz
bpf
(SCF)
CCB
TEST
PLL
(57 kHz)
ANTIALIASING
FILTER
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
SYNC / EC
CONTROLLER
SYNC
DETECT-1
DATA
DECODER
CLOCK
RECOVERY
(1187.5 Hz)
MEMORY
CONTROL
OSC/DIVIDER
VREF
CLK (4.332 MHz)
SYNC
DETECT-2
VDDA
VSSD
VDDD
RDS-ID
SYNC
SYR
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
T5 T6 T7
X IN
VREF FL OUT C IN
X OUT
3 14
15
19
18
24
1 5 6
4
2
20
21
22
23
7
8
9
10
11 16 17 13 12
IC391: LA7956
Video Switch
1 2 3 4 5 6 7 8 9
VIDEO
OUT
A B VIN1 GND VIN2 VCC VIN3 VIN4
DRIVER
6dB
AMP
CONTROL
4 INPUT 1 OUTPUT
VIDEO SWITCH
x: NOT USED
O: USED / APPLICABLE
Point 4 emitter of Q258
and collector of Q259
POWER ON
(Connect the power cable)
POWER OFF
(Disconnect the power cable)
A Q258 E
B Q259 C
Point 2 Pin 12 of IC241 Point 3 Pin 13 of IC242
Page 53
to FUNCTION (1)
G1
Page 55
to MAIN (1) Power Section
A7
Page 52
to DSP
L7
MAIN (1)
µ
-COM Section
MAIN (3)
2
3
4
A
B
12.0 4.9
5.6
0
5.1
12.0
2.2
0 0 0 0 4.9 4.9
1.7
2.2 4.4
0
2.2
0
0 0
1.9 5.7
5.6
4.8
0 4.8 4.8
4.8
0
0
4.9
11.7 0 0
4.8
4.2
4.9
4.9
13.4
13.4
13.4
6.8
0 0
0
0
0
4.8
13.4
13.3
7.4
0
5.6
6.2
5.6
6.2
5.6
5.0 5.6
4.9
0
0
0
0
0
0 0
4.8
1.1
0
0
0
1.1
0.4 0.4
0.8
4.9
4.9 4.9 4.9 5.1
0 0 0 0 0
0
0 0
0
4.9 4.8 4.8 4.9
0 0
4.9
0
4.9
0
4.9
4.8
4.8
1.1
0
0
1.1
4.8
0.4
0.4
0
0.8
4.8
4.9
4.8
0 4.8
4.7
0
4.9 0.3 0.1 4.9
0 0
4.7 4.9 4.8 2.4
0
2.3 4.9 4.9
0 0
5.0
4.9 0.4
4.9
4.9 0.4
4.9
4.9
4.9
4.9
0
0.9
0
0
0
0
0
0
4.9
0
0
11.7
12.1
4.8
-12.0
-12.3
0
0.1
0.7
4.9
4.8
-12.0 4.9
4.8
-12.0 4.9
4.8
-12.1 4.9
4.8
-12.1 4.9
12.1
5.5
6.9
3.9 3.9 12.0 3.9
0
3.9 4.8 4.8 6.2
0
6.3
6.3 6.3
7.2
0