Yamaha RX-V459 Service Manual page 70

A B C
RX-V459/HTR-5940/HTR-5935/DSP-AX459
DSP 2/3
1
DSP
1.3 3.1 3.3 5.0
1.3 3.1
0 0 3.3 5.0
0
3.1
2
0.1
5.0
0
4.0
0
4.9
3
DIGITAL IN
0.3
0
4.9
0.3
0
4.9
4
5.0
2.4 2.4 0.6
0
BUFFER
0 4.9 0
0 4.9 0
5
0 0
5.4 0.1
XM
0.1
0
6
0
1.9 A-1
3.5
3.5
1.8
0
0
0.2
0
XMDT
3.5
0
7
8
9
# 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.
10
70
D E F
0.1
3.3
0 3.3
0 3.3
4.0 0
0.3 0
0 DIR 0
3.3 3.3
0.3
1.6
0.6
1.5
0 A-2 1.7
3.3
3.3
0 0
SELECTOR
0
1.7
0.1
0
0
0
0
1.2
1.7
3.3
0
1.7
0
3.3
0
1.2
0 3.3 1.7
3.3
0
0
0 3.3
0
0
1.2
3.5 0
0
0 0
3.5 1.2
3.5
3.5 0
0 3.3
3.3
3.3
0
3.3
3.3
1.2
3.3
3.3
0
IC53 : R1172S121D-E2-F
IC52 : SN74LVU04APWR
Power supply
Hex inverters
1A 1 14 VCC
1Y 2 13 6A V
DD
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 9 4A
GND 7 8 4Y
CE
G H
POINT A-1 Pin 28 of IC55 POINT A-2 Pin 29 of IC56
FL/FR
C/SW
PL/PR SL/SR
ANALOG IN SBL/SBR
0
0
0
0
3.3
3.3
1.2
3.3
0
3.3
0
3.3
0
3.3
0.4
3.3
0.1
1.2
0.1
0.1
0
3.0
1.2
1.6
1.8
No replacement part available.
0
3.3
2.8
2.9
0
1.2
0.1
0.1
0.1
3.3
IC54 : NJM2885DL1-33
Low dropout voltage regulator
V 1
IN
V
OUT
Bandgap
Reference
GND 2
Vref
Current Limit
GND
I J K
16M SDRAM 4M ROM
3.3 0
0.2 0.1 0.1 0
0.1 0.1 0 3.3
0 0 0 0
0.2 0.2 0.1 0.1
0.2 0.2 0.4 0.1
3.3 3.3 0.1 0.1
0.2 0.1 0.1 0.1
0.1 0.2 2.9 0.2
0 0 0.1
0.1 0.2 0.2
0.1 0.2 3.3 0.2
3.3 3.3 3.3
3.3
2.9 0.1
3.3 2.9 0.2
0.2
3.3 1.7
3.3 3.3 0 0.2
0 0 0.2
3.3 0.1 2.8 0.1
0.4 0.1 1.8 0.2
0.1 2.9 1.6 0.2
0.1 2.8 3.0 3.3
0.1 1.8 0.1 0
3.0 1.6 0.1 3.3
3.3 0 0.1 3.3
IC56 : LC89057W-VF4A-E
Digital audio interface transceiver
EMPHA/UO AUDIO/VO INT CL CE CI XMODE
32 33 35 48 39 38 41
RXOUT 1 Microcontroller
Cbit, Ubit 37 DO
I/F
3 V RX0 2
OUT
36 RERR
3
RX1
RX2 4
Thermal
Input Demodulation
Data
Protection RX3 5 21 RDATA
Selector &
Selector
Lock detect
RX4 8
RX5/VI 9
SDIN
24
RX6/UI 10
16 RMCK
LPF 13 PLL
17 RBCK
Clock 20 RLRCK
TMCK/PIO0 44
Selector
22 SBCK
TBCK/PIO1 45 Modulation
1/N
& 23 SLRCK
TLRCK/PIO2 46
Parallel Port
TDATA/PIO3 47
TXO/PIOEN 48
29 28 27 34
XIN XOUT XMCK CKST
L M N
IC61, 62 : SN74AHCT1G32DCKR IC63 : SN74AHCT08PWR
Single 2-input positive-OR gate Quadruple 2-input positive-AND gates
A 1 5 Vcc
1A 1 14 Vcc
B 2
1B 2 13 4B
GND 3 4 Y
1Y 3 12 4A
2A 4 11 4Y
2B 5 10 3B
2Y 6 9 3A
GND 7 8 3Y
IC64 : W9816G6CH -7
512K x 2 banks x 16 bits SDRAM
CLK 35 CLOCK
BUFFER
CKE 34
COLUMN DECODER
CS 18 CONTROL
SIGNAL
R
RAS 17 GENERATOR O
COMMAND
W
CAS 16 DECODER
D CELL ARRAY
2 DQ0
E
WE 15 BANK #0
C
O 3 DQ1
D
5 DQ2
E
R
A10 20
6 DQ3
SENSE AMPLIFIER
8 DQ4
9 DQ5
A0 21 MODE 11 DQ6
REGISTER
A3 24 ADDRESS 12 DQ7
REFRESH DQ
BUFFER
A4 27 COUNTER BUFFER 39 DQ8
40 DQ9
A9 32
42 DQ10
BA 19
43 DQ11
45 DQ12
46 DQ13
REFRESH COLUMN
COLUMN DECODER
48 DQ14
COUNTER COUNTER
R
49 DQ15
O
W
D CELL ARRAY
E BANK #1
C
O
D
E
14 LDQM
R
SENSE AMPLIFIER 36 UDQM
IC66 : S29AL004D70TF1020
4M-bit COMS 3.0 volt-only boot sector flash memory
DQ0–DQ15 (A- 1)
RY/ BY#
V
CC
Sect or Sw itc hes
V
SS
Erase V olt ag e In put/ Out put
RESET# Generat or
Buff ers
WE# State
Contr ol
BYTE#
Comm and
Regi st er
PGM Vo ltage
Generator
Data
Chip Enab le
Out put Enable STB Lat ch
CE#
Logic
OE#
Y-Decoder
Y- Gating
STB
V De te ct or Tim er
CC
Cell M atrix
X- Decoder
A0– A17
A15 1 48 A16
A14 2 47 BYTE#
A13 3 46 V SS
A12 4 45 DQ15/A-1
A11 5 44 DQ7
A10 6 43 DQ14
A9 7
42 DQ6
A8 8 41 DQ13
NC 9 40 DQ5
NC 10 39 DQ12
WE# 11 38 DQ4
RESET# 12 37 V CC
NC 13 36 DQ11
NC 14 35 DQ3
RY/BY# 15 34 DQ10
NC 16 33
DQ2
A17 17 32 DQ9
A7 18 31 DQ1
A6 19 30 DQ8
A5 20 29 DQ0
A4 21
28 OE#
A3 22 27 V SS
A2 23 26 CE#
A1 24 25 A0
IC65 : SN74LV245APWR
Octal bus transceiver with 3-state outputs
DIR 1 20 Vcc
A1 2 19 OE
A2 3 18 B1
A3 4 17 B2
A4 5 16 B3
A5 6 15 B4
A6 7 14 B5
A7 8 13 B6
A8 9 12 B7
GND 10 11 B8
IC58 : SN74LV157APWR IC59 : SN74AHC1G08DCKR
Quadruple 2-line to 1-line data selectors/multiplexers 2-input positive-AND gate
1A
2
A 1 5 Vcc
1Y
4
1B 3
B 2
A/B 1 16 V CC
2A 5 GND 3 4 Y
1A 2 15 G
7 2Y
2B 1B 3 14 4A
6
1Y 4 13 4B
3A 2A 5 12 4Y
11
2B 6 11 3A
9 3Y
3B 10 2Y 7 10 3B
GND 8 9 3Y
4A 14
12 4Y
4B
13
G 15
A/B
1