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A
B
C
DVR-700/NS-PSW700/NS-P700
POWER
1
2
3
CB701
4
AC IN
5
6
7
8
IC702: FA5511N-D1-TE1
CMOS IC for switching power supply control
9
CS(8)
VCC(6)
REF
5.2 A
15.5V
0.8V/0.68V
(7)
5V VCC
0.95mA
UVLO
ENB
15.5V
5V REF
8.5V/7.9V
16.5V/9V
0.8V
3.5V
ENB
FB
4V
(2)
PWM
Dmax
FA5510: 46%
OSC
FA5511: 70%
R
RT CT
10
QB
+0.24V
Q
S
FF
5V Controlled block
RT(1)
IS+(3)
106
D
E
F
5 k-ohms
10 W
(109.5)
(317.8)
(0)
(108.1)
(1.5)
IC703
(4.0)
(1.3)
(4.9)
(0)
(16.4)
IC701
(0)
(16.4)
(–0.2)
(2.0)
Primary side ground
IC704: NJM431U
Adjustable precision shunt regulator
1
2
3
OUT
(5)
REFERENCE
ANODE
CATHODE
OUT
PUT
GND
(4)
G
H
AC2.2
AC23.3
30.3
AC24.8
AC4.3
AC8.7
3.0
14.1
3.6
3.6
0
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 positions 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, perform discharge by connecting a discharge resistor (5k-ohms/10W) between
terminals at following positions. The time required for discharging is about 30 seconds.
1. C711 on POWER P.C.B..
2. C719 on POWER P.C.B..
I
J
K
W701
W702
–30.3
–29.7
0
–32.0
–32.0
W703
14.3
0
11.6
0
8.6
W704
11.5
0
0
0.8
0
5 k-ohms
10 W
L
M
N
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