Schematic Diagrams - Yamaha BRX-610 Service Manual

A B
BRX-610/NS-PZ20

■ SCHEMATIC DIAGRAMS

1
FOR INFORMATION ONLY (COMPONENT PARTS NOT AVAILABLE)
MAIN 1/14
D5V
NC1
VCC_1.15
FB1 BLM21P
BEAD/SMD/0805
NC0805/SMD
C2 0.1uF/10V
C4 0.1uF/10V
R1
2.4K
2
EN_1.15
C12
R3 0.1uF/10V/NC
10K
10uF/10V/X5R
C0805/SMD
3
CON5
5
FB7 BLM21P
Page 55 B3 4
FB2 BLM21P
3
2 FB4 BLM21P
to AMP_JP703
1
JP1
To AMP Baord
4
5
6
7
40
C D
Close to DC-DC
C1 10uF/10V/X5R
P1_GND
C0805/SMD
C3 10uF/10V/X5R
TDK VLC6045T-2R2N 2.2uH
C0805/SMD
U1
Close to DC-DC
RP1 LP1 2.2uH_6A
7 2
PVIN LX
10 L/IND/SMD/VLC6045
R0603/SMD
C5 C6
6
SVIN
10uF/10V/X5R 10uF/10V/X5R
4 C0805/SMD C0805/SMD
EN
FB_1.15
3 5
NC FB
1 NC4
NC
C13 9 8
NC0805/SMD
TP PGND
P1_GND P1_GND
G5676 P1_GND
A9V
D12V
D5V
D3.3V NC5
VCC_1.5 FB3 BLM21P
BEAD/SMD/0805
NC0805/SMD
RP2
R5 100K
10 U2
R0603/SMD
1 8
VCC VIN
7
LX
C28 EN_1.5
5
EN
4 FB_1.5
FB
3
GND
R6 C30
2
REF
51K
0.1uF/10V/NC
9 6
TP PGND
P2_GND G5693 P2_GND
D5V D5V
Select drop off quickly
normal power net
R9 R10
15K_1%
3.3K
Resistor value can tune
for best power sequence;
R13 100
OFF_MUTE for quickly audio
mute when AC OFF;
1 Q1 Q1 R15 R15 1 Q2 Q2
R14 2N3904 2N3904 1K 1K 2N3904 2N3904
2.74K_1%
VCC R/R to Q1.b
5.000V 0.772V
4.532V 0.700V
3.885V 0.600V
3.237V 0.500V
D5V 3.3V
Select drop off quickly
standby power net
R17 R18 R19
15K_1% 3.3K 10K
Resistor value can tune
for best power sequence;
R20 100
R21 1 Q3 1 Q4
2.74K_1% 2N3904 2N3904
VCC R/R to Q3.b
5.000V 0.772V
4.532V 0.700V
3.885V 0.600V
3.237V 0.500V
E F
NC2 NC0805/SMD
NC3 NC0805/SMD
C7 C8 C9 C10 C11
R2 0.1uF/6.3V 0.1uF/6.3V 0.1uF/6.3V 10uF/6.3V/X5R 10uF/6.3V/X5R
27.5K_1% C0805/SMD C0805/SMD
FB_1.15
R4
30K_1%
AIM 1.15V: 0.6*(27.5+30)/30=1.15V
1.15V power range: 1.0V~1.195V;
C14 0.1uF/10V
C15 0.1uF/10V
Close to DC-DC
C16 10uF/10V/X5R
P2_GND
C0805/SMD
C17 10uF/10V/X5R NC6 NC0805/SMD
C0805/SMD
L2 2.2uH/LQH6PPN2R2N43 NC7 NC0805/SMD
DC Current: 4.1A
Saturation Current: 6.4A
C24 C25
DC resistor: 15mOHM
C22 C23 R7 0.1uF/6.3V 0.1uF/6.3V
10uF/10V/X5R 10uF/10V/X5R 13.3K_1%
C31 C0805/SMD C0805/SMD
0.1uF/10V
FB_1.5 AIM 1.5V: 0.8*(13.3+15)/15=1.509V
1.5V power range: 1.425V~1.575V;
NC8 NC0805/SMD
R8
15K_1%
P2_GND
DC disable
CIRCUIT
C32 10uF/10V/X5R
C0805/SMD
D5V U3 G966A
R11
NC9 4 5
100K
VPP NC
NC0603/SMD
3 6
VIN VO
DC_EN
TP5 TP5
DC_EN AIM 3.3V: 0.8*(15+4.75)/4.75=3.326V
DC_EN for 3.3V drop off 2 7
VEN ADJ
faster than 1.15V; 3.3V power range: 3.0V~3.6V;
C36 C36 33V_OK 1 8
POK GND
0.1uF/10V 0.1uF/10V
9
TP
RESET
CIRCUIT
H13 H14 H7
H1
1 8
TP1
2 7
3 6
RESET# 4 5
MTH157
C37 C38
10uF/6.3V_NC 0.1uF/6.3V
C0805/SMD close to IC
G H
1.15V
POWER
33V_OK
33V_OK
RESET#
RESET#
D1.15V
TP2
CE1
+ +
220uF/6.3V
1.5V
POWER
D1.5V
TP3
C26 C27 C29
0.1uF/6.3V 10uF/6.3V/X5R 10uF/6.3V/X5R + + CE2
C0805/SMD C0805/SMD 220uF/6.3V
3.3V
POWER
3.3V
D3.3V TP4
FB5 BLM21P
R12 C33 C34 C35 + + CE3
15K_1% 0.1uF/6.3V 10uF/6.3V/X5R 10uF/6.3V/X5R 220uF/6.3V
C0805/SMD C0805/SMD
R16
4.75K_1%
PRODUCIBILITY
PARTS
H8 H9 H10 H11 MARK1 MARK2 MARK3 MARK4
H6
H2 H3 H4 H5
1 8 1 8 1 8 1 8
2 7 2 7 2 7 2 7
3 6 3 6 3 6 3 6
2
4 5 4 5 4 5 4 5
MTH157 MTH157 MTH157 MTH157 Heatsink-MT8555/NC
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
I J
4/14
9/14
1
1
2
and must be replaced