Mcx-Ca15 Schematic Diagram - Yamaha MCX-C15 Service Manual

A B
MCX-C15/MCX-CA15
MCX-CA15 SCHEMATIC DIAGRAM (D-AMP)
1
CONTROL IN/OUT
AV IN
2
PN401
D-AMP (4) [LAN]
VIDEO OUT
3
4
9.6
4.8
4.8
4.8
330P
330P
4.8
4.8
4.8
0
5
9
CH1
5.0
5.0
0 -0.1
9
5.0
0
0
0
0
6
5.0
5.0 5.0
5.0
0 5.0
0
0
5.0
5.0
5.0
5.0
7 0 UPD789022GB
0 MASK ROM
0
8
0
0
0
IC204 : SN74LVC1G17DCKR
Single Schmitt-Trigger Buffer
NC Vcc
1 5
A 2
8
Y
GND 3 4
42
C D E
IC203, 302 : NJM4580V-TE2 IC206, 303 : BD4845G
IC304 : BA10393F-E2 Reset
Dual OP-Amp
OUT 1 8 +V
1 CC
–IN 1 2 7 OUT 2
+ – + –
+IN 3 6 –IN
1 2
Vref
–V 4 5 +IN
CC 2
0.1 0
0
0
IR/CTRL AUDIO IN
0
-0.1
5.0
3.3K 3.3K
5.0
1000P
5.0
0
1000P
0
0
0.1
0
0
0
0.1
0.1
0
0.1
CH2
0.1
0
3.4 3.4
0
0 5.0
0 0
IC201 0
0.1
470 0
5.0
0.2
5.0
5.0
0
0.1
0 0
0
5.0
0.1
IC205 : SN74AHCT1G00DCK
Single 2-Input Positive-NAND Gate
A 1 5 Vcc
B
2
GND 3 4 Y
F G
MCX-CA15
V
DD
2
1 V
OUT
3
GND
0 5.0
5.0
0
6.8K
4.8
4.8
4.8
BA10393F-E2
4.8
4.9 3.0 5.9 5.5
4.8
3.0
9.6 0
0
5.6K 5.6K
2.9
0
0.1
0
2.9
0
2.9
0
2.5
0
0
0.1
0.1
0
0.4
0
0
2.5
5.0
0
5.6K 5.6K
D-AMP (2) [CPU]
H I
12.2
12.0
-0.1 -0.1 4.9 4.9 5.1 11.2 12.0
4.9
5.1
4.9 5.1 0
5.0
2.3
0
-0.1 0 0
0 2.7
0 0
0
5.0 12.0
9.6 5.0 12.0
0
0
5.0
4.8
0
5.0 9.6 11.9
4.8
12.2
0
12.0
0 0
BA10393F-E2
0
D-AMP (3) [POWER]
0
0
0
0
0
0
0
11.9
0
0
0.1
4.9
0
0 6.0
5.9 6.0
12.0 6.0
6.2 6.0
0
0 6.0
5.9 6.0
6.2
12.0 6.0
5.9
6.2 6.0
5.9
6.2
6.2
5.8
0 6.0
5.8
5.8 6.0
6.2
12.0 6.0
6.2 6.0
0
0 6.0
5.8 6.0
12.0 6.0
6.2 6.0
* 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.
J K
Point 8 (Pin 14 of IC201)
V: 2V/div, H: 200nsec/div
DC, 1 : 1 probe
DC IN/OUT
0V
SPEAKER OUT
(4 – 16 Ω)
Point 9
CH1: Pin 2 of IC206
CH2: Pin 1 of IC206
V: 5V/div, H: 4.0sec/div
DC, 1 : 1 probe
CH1
CH2
AC POWER ON AC POWER OFF
(Connect the power cable) (Disconnect the power cable)
IC101–104 : FW332-TL D1 D1 D2 D2
8 7 6 5
FET
1 2 3 4
S1 G1 S2 G2
IC105 : YDA135-VZ
Stereo 5W-20W Digital Audio Power Amplifier
Controller
CDIL CDOL
41 42
45
NFPL
AUDIO
34
46 HP_L
NFINL
OUT
BALANCED
47
INL 33
– PULSE WIDTH
+ HN_L
MODULATION
UNIT
31
(L CH)
– LP_L
+
2
VREFL 32
LN_L
44
NFNL
38 39
PVDDL SENSEPL
SW OUT
36 OVER 37
PVSSL SENSENL
OVERHEAT
CURRENT
22
DETECTION
YKC21-4716N 48 DETECTION SENSEPR
VDDL
POWER 24
3 SENSENR
SUPPLY
VSSL
VOLTAGE
8
13 DETECTION TPP
VDDR
10
4
VSSR MUTE
5
23 CONTROL SLEEP
PVDDR
BLOCK 6
PORT
25
PVSSR
9
TEST
16
NFPR
27
11 HP_R
VREFR
BALANCED 28
+
PULSE WIDTH HN_R
–
MODULATION
UNIT 30
+ (R CH) LP_R
14
INR –
29
LN_R
17
15
NFINR NFNR
20 19
CDIR CDOR
IC202 : LC75342M-TLM
Input Selector & Electric Controlled Volume
4 3 2 1 30 29 28 27
LOUT 5 26 ROUT
– + + –
– + + –
LBASS2 6 25 RBASS2
– + + –
LBASS1 7 24 RBASS1
– + + –
LTRE 8 23 RTRE
LIN 9 22 RIN
D-AMP (1) [D-AMP]
LSELO 10 21 RSELO
– + + –
11 12 13 14 15 16 17 18 19 20
* 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。
L