Yamaha NX-E700 - Page 54

CB501
CB502 CB503
W501
W502
IC502
IC506
IC503
IC505
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I J K
L MN
DRX-730/NX-E700
54
SUB 1/2
SUB (1)
AC IN
CONTROL
IC502: L6566BTR
Multi mode controller for SMPS
MODE SELECTION
&
TURN-ON LOGIC
R
PWM
Q
S
DISABLE
VOLTAGE
REGULATOR
&
ADAPTIVE UVLO
TIME
OUT
UVLO_SHF
UVLO
Internal supply
Vcc
Reference
voltages
VccVIn
OCP2
4.5V
Q
6.4V
OVPL
1.5 V
BURST-MODE
5.7V
OVP
UVLO
AC_FAIL
ZERO CURRENT
DETECTOR
50 mV
100 mV
0.450V
0.485V
TIME
OUT
OVPL
14V
IC_LATCH
OFF2
400 uA
OFF2
OVP
-
-
-
+
+
OCP
-+ -+
+
+
-
-
+
-
+
-
+
OVERVOLTAGE
PROTECTION
LATCH
SOFT-START
&
FAULT MNGT
LOW CLAMP
& DISABLE
LEB
OSCILATOR
1
10 14 9 15
7
4
5
6
13
12
11
16
HV
VREF SS AOMP VFF
CS
GD
8
3
GIS
GND
Vcc
FMOD
OSC
MODE/SC
ZCD
AC_OK
3 V
15 uA
DRIVER
15 uA
7.7V
1 mA
Hiccup-mode
OCP logic
LINE VOLTAGE
FEEDFORWARD
IC505: NJM431U
Adjustable precision shunt regulator
ANODEREFERENCE CATHODE
12 3
to MAIN (1)_CB18
Page 53
J4
to MAIN (1)_CB21
Page 53
J4
to MAIN (1)_CB19
Page 53
J5
332.1
0
0.9
0
0
0
0
0
-20.5
-2.2
0
0
0
-27.0
0
-27.0
0
11.3
-0.2
14.7
4.7
14.6
10.7
0.7
0
0
4.7
4.7
4.8
12.1
0
0
12.8
-20.5
20.2
-20.5
0
20.2
0
0
0
1.0
14.6
1.1
0
332.1
128.9
0
3.1
5.0
331.9
1.1
330.8
431.8
431.7
331.5
10.0
14.6
3.1
0
0
-2.2
-3.2
0
14.6
-27.0
-27.0
14.6
0
1.3
0
1.1
2.1
1.0
3.1
129.0
AC10.0