NAD C 565BEE Service Manual page 29

POWER BOARD
D230: ADJUST SHUNT REG
REFERENCE
POWER BOARD
U201: POWER NCP1014
V 8 GND
1
CC
NC
2 7 GND
GND
3
FB
4 5 DRAIN
2.5V
REF
ANODE
Startup Source
V
CC
1
V
CC
Vclamp*
UVLO
I?
IV
CC
Management
2
NC
EMI Jittering
4 V
18 k
Error flag armed?
3
GND
4
FB
*Vclamp = VCC + 200 mV (8.7 V Typical)
OFF
CATHODE
REFERENCE (R)
Iref = 7.4 mA -
Drain
+
IV
CC
High when V 3 V
CC
65, 100 or
Set
130 kHz
DCmax = 65%
Clock
-
+
0.5 V
Overload?
Soft-Start
- 29 -
CATHODE(K)
ANODE(A)
Rsense
S
R
250 ns
Q
L.E.B.
Reset
Q
Flip-Flop
Driver
Reset
V
CC
+
-
Startup Sequence
Overload
Drain
8
GND
7
GND
5
Drain