Ic Block Diagram - Yamaha RX-V420 Service Manual

A B
RX-V420/RX-V420RDS/HTR-5440/HTR-5440RDS/DSP-AX420
1
I IC BLOCK DIAGRAM
IC351: LA7956
Video Switch
6dB
AMP
4 INPUT 1 OUTPUT
DRIVER CONTROL
VIDEO SWITCH
2
1 2 3 4 5 6 7 8 9
VIDEO A B VIN1 GND VIN2 VCC VIN3 VIN4
OUT
IC371, 373: NJM7812FA
IC374: NJM7805FA
Voltage Regulator
INPUT
3
OUTPUT
COMMON
IC372: NJM79M12FA
Voltage Regulator
4
COMMON
OUTPUT
INPUT
5
IC441: LC78211
Analog Function Switch
1 30
L1 R1
2 29
L2 R2
L3 3 28
R3
L4 4 27 R4
5 26
LCOM1 RCOM1
6 25
L5 R5
L6 7 24 R6
6
8 23
LCOM2 RCOM2
9 22
L7 R7
L8 10 21
R8
11 20
LCOM3 RCOM3
19
V DD LEVEL SHIFTER
V 16
SS
14
D1
ZZ
LATCH
12
V
EE
15
ZZ CL
18
RES
SHIFT REGISTER
17 13
S ZZ CE
7
E-53/J-49
C D
IC442: LC78213 IC446, 447: M5220L
Analog Function Switch Dual OP-Amp.
1 30
L1 R1
2 29
L2 R2
LCOM1 3 28 RCOM1
4 27
L3 R3
5 26
L4 R4
1 2
LCOM2 6 25 RCOM2
7 24
L5 R5
8 23
L6 R6
IC731~733: µPC4570C
LCOM3 9 22 RCOM3
Dual OP-Amp
10 21
L7 R7
11 20
LCOM4 RCOM4
V 19 LEVEL SHIFTER
DD
OUT 1
1
V 16
SS
14
ZZ D1
LATCH
V 12
EE
I 11 2
15
ZZ CL
18
RES
SHIFT REGISTER
17 13
S ZZ CE IN 3
1
V– 4
IC443: LC78212
Analog Function Switch
1 30
L1 R1
IC734: LB1641
Motor Driver
L2 2 29 R2
3 28
L3 R3
LCOM1 4 27 RCOM1
L4 5 26 R4
6 25
L5 R5
L6 7 24 R6
LCOM2 8 23 RCOM2
L7 9 22 R7
10 21
L8 R8
LCOM3 11 20 RCOM3
19
V DD LEVEL SHIFTER
16
V SS
14
D1
ZZ
LATCH
12
V EE
IN 1
5
15
ZZ CL
18
RES
SHIFT REGISTER
GND
1
17 13
S ZZ CE
IC771, 772: NJM2068L-D
IC444: µPC4570HA
Dual OP-Amp
Dual OP-Amp
1 2
- + + -
1
1 2 3 4 5 6 7 8 9
Vcc Vo -Vm +Vm V +Vm -Vm Vo Vcc
1 1 1 EE 2 2 2
IC445: LC72722
RDS Decoder
1 5 6
VDDA 3 CLOCK
+ PLL
RECOVERY
(57kHz)
REFERENCE
(1187.5Hz)
VOLTAGE
VSSA 4
VREF
57kHz
DATA
ANTIALIASING SMOOTHING
MPX IN 2
bpf
FILTER DECODER
FILTER
(SCF)
DO 20
CL 21
RAM ERROR CORRECTION SYNC/EC
DI CCB (24 BLOCK DATA) (SOFT DECISION) CONTROLLER
22
CE 23
CLK(4.332MHz)
T1
7 MEMORY
CONTROL
T2 8
TEST SYNC SYNC
T3 DETECT-1 DETECT-2
9 OSC/DIVIDER
T4 10
11 16 17 13 12
E F
IC802: MSM514260C-60JS
4Mbit DRAM
Timing
RAS 14
Generator
LCAS 29
UCAS 28
3 4 5 6 7 8
Column
9 Address
Buffers
Internal
Refresh
A0~A8
Addess
Control Clock
Counter
Row
Row
9 Address 9
Deco-
Buffers
8 V+ ders
7 OUT 2
+ – + –
VCC
20
6 I
12
On Chip
VBB Generater
5 IN
2
VSS
21
IC803: PQ025EZ5MZP
Regulator
Vin Vo
1 3
3 2 8 10 9 7
Vc
2
5
GND
4 VZ
INPUT LOGIC IN 2
6
IC805: TC74HC00AF
IC808: TC74HCU04AF
Quad 2-Input Nand Gate
1A 1
1B 2
1Y 3
2A 4
2B 5
2 3 4 5 6 7 8
2Y 6
GND 7
IC812: AK4527VQ
24bit CODEC
Audio
LIN+
30
I/F
ADC HPF
14 VDDD
LIN- 29
RIN+ 32
ADC HPF
RIN- 31
15 VSSD
RDS-ID
19
LOUT1 LPF DAC DATT MCLK
27
LRCK
BICK
LPF DAC DATT
ROUT1 28
18 SYNC
24 SYR
LOUT2 25 LPF DAC DATT
ROUT2 LPF DAC DATT
26
6DOUT
LOUT3 23 LPF DAC DATT
SDIN1
ROUT3 LPF DAC DATT
24
SDIN2
SDIN3
E-54/J-50
G H
WE OE
13 27
I/O
Controller
Output
8 8
I/O Buffers
Controller
DQ1~DQ8
Input
9 Column Decoders
8
8
Buffers
I/O
Sense Amplifiers
16 16
Selector
Input
8
8
Buffers
Word Memory
DQ9~DQ16
Drivers Cells
Output
8
8
Buffers
IC804: µPC29M33T-E1
Voltage Regulator
1 INPUT
Safety Drive
Limiter
Amp.
3 OUTPUT
Excessive Electric
Current Protection
2 GND
IC806: TC74VHCT08AF
Quad 2-Input And Gate
IC903: NJM78L05A-T3
Voltage Regulator
1A 1 14 Vcc
14 Vcc
1B 2 13 4B
13 4B
1Y 3 12 4A
12 4A
2A 4 11 4Y
11 4Y
2B 5 10 3B
10 3B
2Y 6 9 3A
9 3A
GND 7 8 3Y
8 3Y
MCLK
39
6 LRCK
4 BICK
DAUX
10
Format
Converter
1 SDOS
9 SDTO
SDTI1
6
7 SDTI2
8 SDTI3
I J
IC813~817 : M5220FP
OUT 1 8 +V
1 CC
–IN 2 7 OUT
1 2
+ – + –
+IN 3 6 –IN
1 2
–V CC 4 5 +IN
2
IC901: LC75725E
LCD Driver
DIGIT SEGMENT DRIVER
DRIVER
MPX
BLK 61
VFL 13
LATCH
DIMMER
GRID
TIMING
CONTROL
GENERATOR
SHIFT REGISTER
TIMING
GENERATOR
ADDRESS
DIVIDER
DETECTOR
OSCI 59
CLOCK
GENERATOR
OSCO 58
INPUT
OUTPUT
GND