Sony DAV-DZ350 Service Manual page 40

DAV-DZ350/DZ650/DZ950
– POWER Board –
IC903 SSC6200
FB/CC/OVP 1
VCC 2
+14.6 V/+10 V
+33.5 V
UNDER
VOLTAGE
LOCK OUT
INTERNAL
BIAS
1.2 mA
NC 3
STARTUP 4
PWM
OSCILLATION
92 to 108 kHz
RESET
PULSE
IC905 AZ7500
1IN + 1 +
1IN – 2 –
ERROR AMPLIFIER 1
FEEDBACK 3
DEAD-TIME
CONTROL
0.12 V
COMPARATOR
DTC 4 +
–
CT 5
OSCILLATOR
RT 6
GND 7
C1 8
40
OVER
VOLTAGE
+
+7.3 V
PROTECT
THERMAL
DELAY
SHUTDOWN
R
TIMER
Q S
NOISE
REDUCTOR
FEEDBACK/
OVER CURRENT
PROTECT
PWM
LATCH
PWM
COMPARATOR
0.7 mA
+
–
REFERENCE
REGULATOR
PULSE-STEERING
FLIP-FLOP
CK
D
+7.6 V
+9.6 V
20 A
+8.5 V
OVER LOAD
PROTECTION
R
10 s
S Q
tFMx
+0.52 V
BURST
+0.83 V
+ 16 2IN +
– 15 2IN –
ERROR
AMPLIFIER 2
14 REF
13 OUTPUT CTRL
12 VCC
11 C2
10 E2
Q2
Q1
9 E1
CV/CC
410 A
CONTROL
SOFT
START
+4.7 V/
+3.7 V
12 A
FREQUENCY
24 A
MODULATION
BLANKING
(300 ns)
DRIVE
8 GND
7 FM/SS
6 O.C.P
5 DRIVE