Yamaha MCX-C15 - MusicCAST Network Audio Player, Service Manual

Page: 42 / 52

A B C D E F G H
1
2
3
4
5
6
I J K L
7
8
MCX-C15/MCX-CA15
42
Point 8 (Pin 14 of IC201)
V: 2V/div, H: 200nsec/div
DC, 1 : 1 probe
0V
Point 9
CH1: Pin 2 of IC206
CH2: Pin 1 of IC206
V: 5V/div, H: 4.0sec/div
DC, 1 : 1 probe
CH1
AC POWER ON
(Connect the power cable)
AC POWER OFF
(Disconnect the power cable)
CH2
0
-0.1
0
0
0
5.0
5.0
5.0
0 0.1
0
0
0.1
0.1
0
0
0
0.1
0.1
0
4.8
4.8
9.6
4.8
0
4.8
4.8
4.8
4.8 4.8 4.8 4.8
4.8 4.8 4.8 4.8
4.8
4.8
4.8
4.8 4.8
4.8
0
9.6
0
4.8
4.8
4.8
4.8 4.8
4.8 0
0
0 0
0
0 0
0
0 5.0 5.0
5.0
0
-0.1
5.0
5.0
5.0
5.0 5.0
5.0
5.0
0
0
0
5.0
5.0
0.1
0
0
0
0
5.0
5.0
5.0
0.1
0.1
0.2
5.0
5.0
0
0
0
0
0
0
5.0 5.0 0 5.0 5.0 5.0 5.0 0.1 0.1 0
0.1 2.9 0 2.4 0 5.0 0 0 0 4.4
5.0
0
0.1
0
0
0
0
5.0
0
3.4
0
3.4
0
5.0
0.1
0
4.9
11.9
0
0
0
0
0
0
0
0
0
6.0
6.0
6.0
6.0
0
5.9
12.0
6.2
6.0
6.0
6.0
6.0
0
5.9
12.0
6.2
6.0
6.0
6.0
6.0
0
5.8
12.0
6.2
6.0
6.0
6.0
6.0
0
5.8
12.0
6.2
0
2.9
0.1
0
0
2.9
0
0
2.9
0
6.2
6.2
6.2
6.2
0
5.9
5.9
5.8
5.8
2.5
0
0
0
2.5
0.1
0.1
0
0.4
2.5 2.6 2.6 2.5
12.0
2.5 5.0
0
12.0
2.5
2.5 2.6 2.5 2.5 12.0 2.5 5.0 0 12.0 2.5
12.2
12.0
11.2 12.0 -0.1
4.9
-0.1 4.9 5.1
4.9
5.1
0 5.1
4.9
0
-0.1 0 0
0 0
0
2.7
2.7
5.5
0
0
5.0
5.0
0
0
2.3
5.0
4.8
4.8
4.8
4.8
4.8
3.0
0
9.6
0
4.9 5.9
4.8
5.0
3.0 5.5
0
0
0
9.6
0
0
4.8
5.0
9.6 11.9
12.2
12.0
0
0
5.0 12.0
5.0 12.0
9 CH1
9
CH2
8
AV IN
CONTROL IN/OUT
IR/CTRL AUDIO IN VIDEO OUT
PN401
D-AMP (4) [LAN]
470
AUDIO
OUT
SW OUT
DC IN/OUT
SPEAKER OUT
(4 – 16
Ω
)
D-AMP (3) [POWER]
D-AMP (1) [D-AMP]
D-AMP (2) [CPU]
120 120
3.3K 3.3K
1000P
1000P
C283
C282
330P
330P
330P
330P
3300P
470
IC201
UPD789022GB
MASK ROM
6.8K
BA10393F-E2
BA10393F-E2
R333 820K
YKC21-4716N
5.6K 5.6K
5.6K
5.6K 5.6K
5.6K
J112
0.0
J111 0.0
YKC-3913N
■
MCX-CA15 SCHEMATIC DIAGRAM (D-AMP)
* All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to
those originally installed.
* Schematic diagram is subject to change without notice.
* 電圧は、内部抵抗10MΩの電圧計で測定したものです。
*
Z
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。
IC203, 302 : NJM4580V-TE2
IC304 : BA10393F-E2
Dual OP-Amp
– +
OUT
1
–IN
1
–V CC
+V
CC
OUT
2
1
2
3
4 5
+IN 1 –IN 2
+IN 2
– +
6
7
8
IC105 : YDA135-VZ
Stereo 5W-20W Digital Audio Power Amplifier
Controller
46
41 42
20 19
45
34
33
31
32
44
39
37
22
24
8
4
5
6
9
16
27
28
30
29
17
47
2
38
36
48
3
13
10
23
25
11
14
15
CDIL
BALANCED
PULSE WIDTH
MODULATION
UNIT
(L CH)
BALANCED
PULSE WIDTH
MODULATION
UNIT
(R CH)
CDOL
CDIR CDOR
INL
NFINL
NFPL
NFNL
TPP
MUTE
SLEEP
PORT
TEST
SENSEPL
SENSENL
SENSEPR
SENSENR
HP_L
HN_L
LP_L
LN_L
NFPR
NFNR
HP_R
HN_R
LP_R
LN_R
VREFL
PVDDL
PVSSL
VDDL
VSSL
VDDR
VSSR
PVDDR
PVSSR
VREFR
INR
NFINR
POWER
SUPPLY
VOLTAGE
DETECTION
OVERHEAT
DETECTION
OVER
CURRENT
DETECTION
CONTROL
BLOCK
+
+
–
–
+
+
–
–
28 27 29 30 1 2 3 4
14 13 12 11 15 16
5
7
9
10 21
17 18 19 20
8
6
26
23
25
24
22
CCB
INTERF
A
C
E
CONTR
OL
CIRCUIT
CONTR
OL
CIRCUIT
CONTR
OL
CIRCUIT
LVREF
R
VREF
+ –
– +
+ –
+ –
+ –
– +
+ –
+ –
+ – + –
LOUT
LBASS2
LBASS1
LTRE
LIN
LSELO
ROUT
TEST VSS CE DI CL VDD VREF NC
RBASS2
RBASS1
RTRE
RIN
RSELO
L4 L3 L2 L1
NC NC
R1 R2 R3 R4
IC202 : LC75342M-TLM
Input Selector & Electric Controlled Volume
IC101–104 : FW332-TL
FET
1 2 3 4
8 7 6 5
S1 G1 S2 G2
D1 D1 D2 D2
MCX-CA15
IC204 : SN74LVC1G17DCKR
Single Schmitt-Trigger Buffer
5
4
1
2
3
Vcc
Y
NC
A
GND
IC205 : SN74AHCT1G00DCK
Single 2-Input Positive-NAND Gate
5
4
1
2
3
Vcc
Y
A
B
GND
IC206, 303 : BD4845G
Reset
Vref
1
3
V
OUT
V
DD
GND
2