Yamaha R-N500, Service Manual

Page: 77 / 100

A
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10
B C D E F G H I J K L M N
77
OPERATION 3/3
R-N500
★
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.
Primary side ground
140.0
189.6
189.2
140.1
17.5 17.5
16.8
1.3
5.4
4.4
2.5
5.6
5.6
5.5
0
T H 5 4 1
N T P A D 5 R 1 L D N B 0
D5404
RB215T-90
I C 5 4 4
T L P 7 8 1 ( D 4 - G R )
C5409
no_use
D 5 4 0 1
D B L 1 5 5 G
C5414
2200/25
C 5 4 0 5
0 . 0 1 / 2 5 0
C5413
1000P/630
C5406
0.015/100
R 5 4 0 9
2 2
R5401
1/4P4.7K
R5415 8.2K
R540
2
1/4P4.7K
F5401
T2.0A250V
D 5 4 0 5
1 S S 3 5 5 V M
R5406
1/2P150K
CB541
VHIS
D 5 4 0 7
1 S S 3 5 5 V M
C 5 4 0 4
0 . 2 2 / 2 5 0
L 5 4 0 1
1 . 5 U H
C5417
330P(SL) no_use
D 5 4 0 8
1 S S 3 5 5 V M
D 5 4 0 3
S A R S 0 5
IC543
TL431ACLPR
A
R
K
CB544
VHIS
2 4 5 T S
C 5 4 0 3
1 0 0 0 P / 2 5 0
C5410
3300P/250
R5411
180
F G
R54
10
10
RY541
DLS5D1-O(M)0.25
I C 5 4 2
T L P 7 8 1 ( D 4 - G R )
I C 5 4 1
S T R 2 A 1 5 3
1
S/OCP
2
VCC
3
GND
4
FB/OLP
5
D/ST
6
D/ST
7
D/ST
8
D/ST
R5417
68
no_use
R 5 4 1 3
2 2 K
R 5 4 0 8
1 K
W B 0 8 5 2 0
H S 5 4 1
R5414 1.8K
C B 5 4 3
D5409
1SS355VM
T 5 4 0 1
Y D 3 2 5
9
1 0 1
2
3
5
7 4
8
6
D 5 4 0 2
R F 1 0 1 L 2 S
D 5 4 0 6
1 S S 3 5 5 V M
C 5 4 1 6
0 . 0 4 7 / 1 6
C5418
220/10
R5405
no_use
C5415
2200/25
C5419
1000P/100
D L S 5 D 1 - O ( M ) 0 . 2 5
R Y 5 4 1
R5404
1P0.75
R5412 1.5K
R 5 4 0 3
1 / 2 P 3 M
C B 5 4 2
C 5 4 0 2
1 0 0 0 P / 2 5 0
R5416 8.2K
R 5 4 0 7
1 P 4 7
F I 5 4 1
E L F 1 7 N 0 1 0 A K
1
4 3
2
S T 5 4 1
C5401
s542
C5407
s543
C 5 4 1 1
s 5 4 5
C 5 4 1 2
s 5 4 2
F 5 4 0 2
s 5 4 1
R 5 4 1 8
s 5 4 4
C B 5 4 5
5 3 2 9 0 - 0 8 8 0
C B 5 4 6
5 3 2 9 0 - 0 4 8 0
C5408 22/50
U C
6 A 1 2 5 V
D E S T
U C
5401 5600
541 560
POWER CORD
W Y 6 8 5 5 0
W Y 0 0 1 3 0
U C R S
G N D
P R I < -
W M 9 3 3 1 0
to MAIN(3) (AC-DC 2)
3 3 0 0 / 2 5 0 U C
W Q 2 1 1 1 0
TRANSFORMER
D G N D
2 2 0 0 / 2 5 0
V V 0 7 1 7 0
W Q 8 5 2 5 0
5 . 5 V
W Q 9 0 2 2 0
A C - D C C O N V E R T E R
- > S E C
5 . 5 V
6 8 / 4 0 0
5 . 5 V
W J 3 6 1 2 0
W B 2 2 1 2 0
K A B G L
K A B G L
W W 7 6 6 0 0
A C _ P W R
0 . 0 2 2 / 6 3 0
W W 7 6 6 1 0
M A I N ( 1 )
O P E ( 2 )
R K A B G L S
5 . 5 V
1 5 0 / 4 0 0
W W 8 7 2 0 0
G N D
0 . 0 4 7 / 4 0 0
G N D
G N D W J 3 6 1 8 0
T 5 . 0 A L 2 5 0 V
8 A 1 2 5 V
2 2 0 / 2 2 0
T 3 . 1 5 A L 2 5 0 V
R S
P R Y _ I N
R K A B G L S
M A I N ( 1 )
W S 6 2 0 2 0
T 4 . 0 A L 2 5 0 V V V 0 7 1 8 0
-
-
-
IC541 : STR2A153
Switching regulator
UVLO REG
OCP
LEB
Drain Peak current
Compensation
Feedback
Control
Slope
Compensation
OLP
VCC
OVP TSD
DRV
PWM OSC
S Q
R
VREG
STRATUP
1 S/OCP
2 VCC
4
FB
5-8
D/ST
3 GND
IC543 : TL431ACLPR
Adjustable precision shunt regulators
Vref
REF
CATHODE
ANODE
to POWER TRANSFORMER
AC IN
OPERATION (2)
POWER
TRANSFORMER
to MAIN (3)_CB279
Page 78 L8
to MAIN (3)_CB281
Page 78 L8
5 k-ohms
10 W
Notes)
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.
C5407 on OPERATION (2) P.C.B