Yamaha HTR-6230, Service Manual

Page: 83 / 99

★
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.
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
83
HDMI
RX-V365/HTR-6230
IC903
IC902
CB901
CB903 CB903
IC907
CB904
CB905
IC908
IC908
IC905
IC904
IC906
IC901
0
0
0
1.0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1.2
0
0
0
0
0
0
0
0
0
0
0
3.3
0
0
0
0
0
0
0
0
0
0 0 0 0
3.3 3.3
0 0 0 0 0
3.3
0
0
3.3
0
0 0 0 3.3 0 0
3.3 0
3.3
3.3 3.3 3.3
0
0
0
0
0
0
0
3.3
0
3.3
3.3
3.3
0
0
0
3.3
0
3.3
0
0
0
0
0
0
0
1.4
1.2
1.0
0
0
0
0
0
5.3
0
0
0
3.3
3.3
5.3 3.3 3.3
0
0
0
0
0
0
3.3 0
0
0.8
0
0 5.3
5.3
0
0
0
0
IC903 : CXB1442AR-T4
Cable equalizer with 2-system switching function
ADTnP
ADTnN
ACKP
ACKN
BCKP
BCKN
SEL
CE
YDTnP
YDTnN
EQ outputs
BDTnP
BDTnN
YCKP Equalizer
Quantizer
Quantizer
Input switching
circuit
Equalizer
Input switching
circuit
Termination
resistor
Output buffer
Output buffer
n= 0, 1, 2
YCKN
REXT
EQ inputs
CMOS inputs
Control Logic
Clock
Detector
Output Current
Control Circuit
Output
Termination
Detector
Output
Termination
Detector
1 2 3 4 5 6 7 8 9 10 11 12
24
25 26 27 28 29 30 31 32 33 34 35 36
SEL Vcc ADT1P ADT1N GND ADT0P ADT0N GND A
CKP
A
CKN
Vcc CE
TES
T
Vcc
BDT0N
BDT0P
GND
BDT1N
BDT1P
GND
BDT2N
BDT2P
Vcc
REXT
YCKN
YCKP
GND
YDT0N
YDT0P
Vcc
Vcc
YDT1N
YDT1P
GND
YDT2N
YDT2P
Vcc
Vcc
ADT2N
ADT2P
GND
Vcc
Vcc
GND
BCKN
BCKP
Vcc
Vcc
37
38
39
40
41
42
43
44
45
46
47
48
23
22
21
20
19
18
17
16
15
14
13
IC907 : SN74CB3Q3257PWR
Low voltage high-bandwidth bus switch
1B1 1A
OE
1B2
SW
SW
2B1 2A
2B2
SW
SW
3B1 3A
3B2
SW
SW
4B1 4A
4B2
SW
SW
S
4
7
9
12
1
15
2
3
5
6
11
10
14
13
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S
1B1
1B2
1A
2B1
2B2
2A
GND
V
CC
OE
4B1
4B2
4A
3B1
3B2
3A
V
OUT
V
IN
Control
GND
1
4 5
2
IC902 : NJM2867F3-05
Low dropout voltage regulator
IC901 : PCA9517DP
Level translating I 2 C-bus repeater
Bandgap
Reference
Thermal
Protection
IC905 : NJM2885DL1-33
Low dropout voltage regulator
V OUT V IN
GND
1 3
2
Bandgap
Reference
Thermal
Protection
IC906 : SN74LVC1G08DCKR
Single 2-input positive-AND gate
1
2
3
5
4
A
B
GND
V
CC
Y
IC908 : SN74LVC2G17DCKR
Dual schmitt-trigger buffer
1
2 5
3
1A
GND
2A 4
6 1Y
VCC
2Y
IC904: SN74LVC3G04DCTR
Triple inverter gate
1
2
3
4
8
7
6
5
1A
3Y
2A
GND
VCC
1Y
3A
2Y
GND
EN
SDAB
SCLB
SDAA
SCLA
CCA
V
CCB
V
CCB
pull-up
resistor
V
3
1 8
4
6
7 2
5
HDMI
OUT DVD DTV/CBL
to OPERATION (4)_W182
Page 80 I4
to OPERATION (2)_W2154
Page 80 A8