Schematic Diagrams - Yamaha YHT-S300 Service Manual

A B C

SCHEMATIC DIAGRAMS

INPUT
1
2
CB603
3.3
3.3
0.2
3.3
To FM TUNER 0
0
8.9
3.3
0
3
POINT A XL601 (Pin 14 of IC603)
4
0
3.4
5 0
0
0.4
0
0
0
3.4
0
0
0
DOCK
0
0
0
0
0
0
3.4
6
0
0
0
No replacement part available.
サービス部品供給なし
7
ANALOG INPUT
8
4.0
0
TV
5.0
IC602: TPS54331DR
3A, 28V input, STEP DPWN SWIFT
with ECO-MODE
9
IC601: NJM2750M-TE2
4 input /1 output stereo audio selector
VSENSE 5
GND
IN1a 1 16
CNT1 2 15 OUTa
V+
IN2a SS 4
3 14 V+
10
CNT2 4 LOGIC 13 IN3a
IN4a 5 bias 12 Vref
IN1b 6 11 OUTb
COMP 6
(N.C.)
IN2b 7 10
IN4b 8 9 IN3b
D E F
IC603
12.3
3.0
2.4
IC601
AUDIO INPUT SELECTOR
0
13.5
0
0
0
3.4
0
TM
DC/DC converter
TM
EN VIN
3 2
165C
Thermal
Shutdown
1 μA 2 μA
Shutdown
Shutdown
Logic
1.25V
Enable IC603 LC72725KM-UY-TLM-E
Enable
Comparator
Threshold Boot
RDS signal demodulation IC
Charge
ECO-MODE ™ Boot
1 BOOT
Minimum Clamp UVLO
+3V
2.1V
Error
PWM 12A/V Vdda
– PWM
Amplifier Current
Comparator
Latch Sense
+
80m-ohms
2 μA + gm = 92μA/V Gate R Q Vssa
Logic
DC gain = 800 V/V
BW = 2.7MHz Drive S
MPXIN
Voltage
Reference
Slope
2 k-ohms ∑
0.8V Compensation
Shutdown
Discharge 8 PH
Logic
VSENSE Frequency
Oscillator
Shift
TEST
7 GND
Maximum
Clamp
G H
RDS
A
(G, F models) 12.3 8.9
9.7
9.7
0
5.1 12.3
IC605
5.1 12.3
0
LEGULATOR
ADC
2.6 0
2.6 0
2.6 0
4.9 3.3
5.1 3.3
0 1.7
3.3
3.4
0 0
0
0 0 1.3
1.7
1.7
0
0
0
0
IC604: PCM1803DBR
Stereo A/D converter
V IN L
V 1
REF
V REF 2
V R
VREF FLOUT CIN +3V IN
Vddd
CLOCK
PLL
RECOVERY
REFERENCE (57kHz)
(1187.5Hz)
VOLTAGE
Vssd
VREF
57kHz
BPF DATA RDDA
ANTIALIASING SMOOTHING
(SCF) DECODER
FILTER FILTER
RDCL
RDS-ID/READY 1 16 RDCL
RAM
MODE RDDA 2 15 RST
(128bits)
VREF 3
14 XOUT
RST MPXIN 4 13
CLK(4.332MHz) XIN
RDS-ID RDS-ID/ Vdda 5 12 Vddd
TEST
OSC DETECT READY Vssa 6 11 Vssd
FLOUT 7 10 MODE
CIN 8 9 TEST
XIN XOUT
I J K
Delta-Sigma BCK
Modulator LRCK
DOUT
Serial
x 1/64, x 1/128 Interface
Decimation
Reference Filter
With Mode/
FMT0
High-Pass Filter Format
Control FMT1
V L 1 20 MODE1
IN
V R 2 19 MODE0
Delta-Sigma MODE0 IN
Modulator V REF 1 3 18 FMT1
MODE1
V REF 2 4 17 FMT0
V 5 16 OSR
BYPAS CC
AGND 6 15 SCKI
TEST
PDWN 7 14 V
DD
OSR
BYPAS 8 13 DGND
Clock and Timing Control
Power Supply PDWN
TEST 9 12 DOUT
SCKI
LRCK 10 11 BCK
V AGND DGND V
CC DD
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ 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.
L M N
SR-300/NS-BR300/NS-P705/NS-B380
5.0
12.3
0
0
Page 83 K4
13.5
13.5 to POWER (1)_CB705
0
0
W1601
0
0
0
0
3.4
0
0
0
1.8
0
3.4
3.4
0
Page 82 B8
3.4
to MAIN_CB310
0.5
3.3
0
3.3
3.3
3.3
0.2
0
1.8
0
0
0
0
CB604
CB606
3.3
3.3
0
1.7
0
1.7
0
Page 81 B6
1.7
to MAIN_CB305
0
1.3
0
4.0
0
0
IC605: KIA78L05F-RTF/P
Three terminal positive voltage regulator
3 INPUT
Q14
Q3 Q5
Q1
Q12
Q13
Q11
Q4 Q6
C1
Z1 Q16
Q10
1 OUTPUT
Q9
Q2 Q7 Q8
Z2
2 COMMON
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● 印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがございます。
79