Printed Circuit Boards - Yamaha MCR-B043 Service Manual

A B
MCR-B043/MCR-B043D/NS-BP83

■ PRINTED CIRCUIT BOARDS

1
Note:
Precaution for handling measuring instrument
Since the speaker output of this unit is BTL connected, the ground side
of the measuring instrument to be connected to the speaker terminal
MUST be kept in floating condition.
注意：
計測機器取り扱い上の注意
本機のスピーカー出力は BTL 接続となっていますので、スピーカー端子
2
に接続する計測器のアース側はフローティング状態に保つ必要がありま
す。
3
No replacement part available.
サービス部品供給なし
4
Power supply module
(CON2)
5
1
3 4
5 k-ohms
5
10 W
+5U
+5U
+5U
GND
8 5
GND 9 4
GND 12
1
13 16
USB_D-
USB_D+
HP_L
GND
6
HP_R
HP_DET
LED_CTRL
+34D_PRT
OPERATION
(CB501)
7
52
C D E
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such
as wearing insulating gloves.
• Note that the capacitors indicated below are dangerous even after the power is turned off because an electric charge remains and a
high voltage continues to exist there. Before starting any repair work, connect a discharging resistor (5 k-ohms/10 W) to the terminals
of each capacitor indicated below to discharge electricity. The time required for discharging is about 30 seconds per each.
C2006 on MAIN (1) P.C.B.
MAIN (1)
(Side A)
SPEAKERS
L R
AUX IN
MCR-B043
JK301
IC205
1 5
25 17
26 16
IC206
32 10
1 9
3
4
5
1
W2001
4 1
IC203
5
8
8
5
IC208
1 4
1
8
36
4 5
1
IC210
W301
No replacement part available.
サービス部品供給なし
F G
MCR-B043 MCR-B043D
安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、絶縁性の手袋を使用するなどの安全対策を行ってください。
・ 下記のコンデンサには電源を OFF にした後も電荷が残り、高電圧が維持されており危険です。修理作業前に放電用抵抗
（5 k Ω /10 W）を下記の各コンデンサの端子間に接続して放電してください。放電所用時間は各々約 30 秒間です。
BT_5V
BT_N_RST
BT_MISO
UART_TX_IND
BT_MFB
BT_BCLK
GND
BT_SDO
MCR-B043D
Writing port
CB107
30 1
100
31
IC104
1 8
4
5
1 16
IC102
50 80 81
51
8 9
3 1
25
24
4 5
IC304
1
48
192 129
193 128
IC302
65
256
64
1
MCR-B043D
19
IC301
18
CB301
Loader mechanism unit
H I
MAIN（1）P.C.B. の C2006
Bluetooth module
GND
BT_MOSI
GND
AMP_EN
GND
NC
BT_LRCLK
U, K, A, B, G, L, V, J models
AM/FM TUNER
(U, J models)
FM TUNER
(T, K, G, L, V, S, H models)
DAB
(CB502)
(A, B, G models)
TUN/DAB_N_RST
TUN_SDA
TUN_SCL
TUNE
NC/GND
KSE-GND/Z-VCC
ROUT
VCC
LOUT
KEY0
VOL_RB
VOL_RA
P_SW
GND
+3.3M
REMOTE • Semiconductor Location
+3.3S
Ref no. Location Ref no. Location
FL_N_RST
FL_N_CS
D101 G4 IC205
FL_SCK
D102 D4 IC206
FL_MOSI
FLGND
D103 D4 IC207
+VPFL
D106 E3 IC208
D107 E3 IC209
OPERATION
D180 D4 IC210
(CB503)
D181 B6 IC301
D182 B6 IC302
IC304
D2001 D5
MCR-B043
D2002 D5 IC305
D2003 D4 Q101
D2004 D4 Q104
D2006 C5 Q105
D2007 B5 Q2005
IC102 F3 Q2006
IC103 G4 Q2007
IC104 E3 Q2008
Q2011
IC105 E4
IC203 C5 Q2012
CB301 IC204 D4 Q301
Loader mechanism unit
J
MAIN (2)
(Side A)
D3
C4
B5
D6
D6
C6
E6
F5
F4
B6
G4
E4
E3
D5
C5
C5
D6
C6
C6
F6