Yamaha YHT-196 Service Manual page 80

A B C
HTR-2064/NS-B20/NS-C20/NS-SWP20
DIGITAL 4/4
1
2
to DIGITAL 2/4
to DIGITAL 1/4
3
4
to DIGITAL 3/4
5
to DIGITAL 2/4
6
7
8
9
10
★ Components having special characteristics are marked
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
80
D E F
DIGITAL IN
IC261
DIR
IC268
IC266
IC264
to DIGITAL 3/4
IC265
to DIGITAL 2/4
CB262
Page 82 B8
to OPERATION (2)_CB131
G H
CB261
ADC
to DIGITAL 2/4
FL/FR
C/SW
SL/SR
DAC
IC267 IC267
to DIGITAL 2/4
IC266: NJM2830U1-05 (TE1)
Low dropout voltage regulator
V 5
IN
CONTROL 1
GND 2
I J K
DIGITAL IN
FRONT L
CENTER
SUBWOOFER
SURROUND L
IC267 IC267
IC268: NJM2867F3-05
Low dropout voltage regulator
V V
4 V 5 4
OUT IN OUT
Thermal Control 1
Thermal
Protection
Protection
Bandgap
Bandgap
Reference
Reference
GND
2
L M N
IC261: LC89058WD-E
Digital audio interface receiver
MOUT INT AUDIO
32 35 33
41 XMODE
Fs calculator
GPIO0 44 Microprocessor
40 CL
GPIO1 45 I/F
39 CE
46
GPIO2
Cbit, Pc 38 DI
GPIO3 47
37 DO
RXOUT2 48
RXOUT1 1
RX0 2
Input 36 RERR
Demodulation
RX1 3
Selector and
24 SDIN
RX2 4 Lock detect Data
Selector
RX3 5
21 RDATA
RX4 8
RX5 9
PLL
Clock
RX6 10 Clock 16 RMCK
Selector
Divider
17 RBCK
LPF 13
20
RLRCK
XIN 29
Oscillation
22 SBCK
XOUT 28
Amplifier
23 SLRCK
27
XMCK
34
CKST
IC262: PCM1803DBR
Stereo A/D converter
Delta-Sigma BCK
V L
IN Modulator
LRCK
DOUT
Serial
x 1/64, x 1/128
Interface
V 1
REF Decimation
Reference Filter
V 2 With Mode/
REF
High-Pass Filter Format FMT0
Control FMT1
Delta-Sigma MODE0
V IN R
Modulator MODE1
BYPAS
TEST
OSR
Clock and Timing Control PDWN
Power Supply
SCKI
V CC AGND DGND V DD
V L 1 20 MODE1
IN
V IN R 2 19 MODE0
3 18
V REF 1 FMT1
V 2 4 17 FMT0
REF
V 5 16 OSR
CC
AGND 6 15 SCKI
PDWN 7 14 V
DD
BYPAS 8 13 DGND
TEST 9 12 DOUT
LRCK 10 11 BCK
Page 82 E4
to OPERATION (4)_CB196
IC263: PCM1681PWPR
Audio digital-to-analog converter
Output Amp and V OUT 1
DAC
Low-Pass Filter
BCK
LRCK
Output Amp and V OUT 2
DAC
Serial Low-Pass Filter
DATA1 (1, 2) Input
I/F
Output Amp and V 3
DATA2 (3, 4) DAC OUT
Low-Pass Filter
DATA3 (5, 6)
DATA4 (7, 8)
8 x Output Amp and V
DAC COM
Oversampling Enhanced
Low-Pass Filter V 4
Digital Filter Multilevel OUT
With
Delta-Sigma
Output Amp and
Function Modulator DAC
Controller Low-Pass Filter V 5
OUT
MS/ADR/FMT1
Output Amp and
MC/SCL/DEMP DAC
Low-Pass Filter V 6
OUT
MD/SDA/MUTE Function
Control
Output Amp and
I/F DAC
Low-Pass Filter V 7
OUT
MSEL Output Amp and
DAC
Low-Pass Filter V 8
OUT
System Clock
System Clock
SCK Zero Detect Power Supply
Manager
28
ZR1/ZR1/FMT0 1 ZR2
2 27 V OUT 1
MS/ADR/FMT1
MC/SCL/DEMP 3 26 V OUT 2
4 25 V COM
MD/SDA/MUTE
SCK 5 24 AGND2
V CC 2
DATA1 6 23
BCK 7 22 V OUT 3
8 21 V OUT 4
LRCK
V DD 9 20 V OUT 5
V OUT 6
DGND 10 19
DATA2 11 18 AGND1
DATA3 12 17 V CC 1
Page 82 E2
DATA4 13 16 V OUT 7
14 15 V OUT 8
to OPERATION (4)_CB195 MSEL
IC264, 265: BD9325FJ
2A output current integrated MOSFET step down regulator
VCC
EN 5V
OPEN
7 VREF OSC VREG
SHUTDOWN
BST
1
OCP
12V
VIN
UVLO
2
IBIAS
TSD
S LVS
FB
ERR OUTPUT
5 DRV SW
3
LOGIC
COMP SLOPE
PWM R
LVS
6
SS
8 Soft Start
4
GND