Yamaha HTR-4064 Service Manual page 93

A B C
DIGITAL 3/6
1
CB41
2
3
4
5
6
7
CB42
8
9
10
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
★ Components having special characteristics are marked
and must be replaced ● 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、
with parts having specifications equal to those originally installed. 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。
★ Schematic diagram is subject to change without notice.
● 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あります。
D E F
to DIGITAL 4/6
to DIGITAL 5/6
POINT B XL41 (Pin 48 of IC46)
IC47
1.3 3.4
IC42: R1172H121D-T1-F
IC42
CMOS-based positive-voltage regulator IC
3.3 0
V DD 4 5 V OUT
Vref
Current Limit
CE GND
1 2
Pin No. Symbol Description
1 CE Chip Enable Pin
2 GND Ground Pin
NC No Connection
3
V Input Pin
4 DD
V Output Pin of Voltage Regulator
5 OUT
G H I
3.4
3.4
0
1.6
0 B
3.4 0
3.4 0
USB HOST
3.4
3.4
3.4
3.4
3.4
IC46
3.4
3.4
3.4
3.4
3.4 0
3.4
No replacement part available.
0
サービス部品供給なし
0
1.6 3.4
3.4
3.3
0 3.4
5.2
1.1
0 0
0
5.1 0
5.6 3.3
IC44 IC45
J K L
Page 97 M3
to OPERATION (5)_W4301
IC46: BU94607KV
WAV/AAC/WMA/MP3 decoder IC
CB44
5.2
0
0
60
0
3.3 LED_ERROR/SS_CS 61
LED_PLAY/SS_DI 62
LED_PSD/SS_CLK 63
LED_PUSB/SS_DO 64
LED_ACCESS/LRCKO 65
LED_RANDOM/BCKO 66
LED_REPEAT/SDATAO 67
DVDDIO 68
TEST13 69
TEST14 70
SEL_USB 71
TEST4 72
73
TEST3
TEST2 74
75
TEST1
TMODE 76
DVSS 77
DVDD_M1 78
79
DVDDIO
TEST0 80
1
to DIGITAL 4/6
V
IC49
3.3
to DIGITAL 4/6
0
Page 103 H3
0
5.6
to VIDEO (3)_W3703
5.6
CB43
0
0
Page 97 K2
0
to OPERATION (5)_W4302
5.6
5.6
CB45
IC44, 45: BD9329AEFJ-E2
1ch step-down DC/DC converter
VCC
OPEN EN
SHUTDOWN 7 VREF
IBIAS
FB
ERR
5
COMP SLOPE
6
SS
8 Soft Start
M N
RX-V471/HTR-4064
59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
40 AVDDC
USB
Audio DAC PLL
PHY 39 ATEST1
38 DVDD_M2
37 DVSS
Audio
Sound Effecter USB
36 TEST10
Controller
Controller
35 TEST9
34 TEST8
AAC / WMA / MP3
33 DVDDIO
Decoder
IPL 32
TEST7
FAT
31 TEST6
SIO I/F
File system
Controller
30 TEST5
29 TEST/CKL12MO
SD I/F
28 FL_CS
Controller
27 DVSS
26 SD_CS
25 SD_DI
System I2C I/F
CD-ROM I/F
LDO Controller Controller
24 SD_CLK
23 SD_DO
22 SD_CON
21 SD_PW
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
IC48: RP130Q501D-TR-F
Voltage regulator
DD 4 3 V OUT
Vref
Current Limit
CE GND
1 2
Pin No. Symbol Description
1 CE Chip Enable ("H" Active)
2 GND Ground Pin
3 V OUT Output Pin
4 V Input Pin
DD
5V
OSC VREG
BST
1
OCP
12V
VIN
UVLO
2
TSD
S LVS
DRV SW OUTPUT
3
LOGIC
PWM
R LVS
4
GND
93