Ic Block Diagram - Yamaha STAGEPAS 500 Service Manual

STAGEPAS 500

IC BLOCK DIAGRAM

FA3641N (X8570A00)
PWM Control
POWER: IC803
RTRch 1
2
FB
IS(+)/IS(-) 3
GND 4
LB1407-E LF (AAX68710)
AC/DC Voltage Level Meter
CONTROL2 (2/3): IC604
Vcc 1
2
Rch
3
Vref
IN +
4
IN --
5
OUT 6
GND
7 7
NJM2068M-D TE1 (AAX62750)
Dual Operational Amplifier
CONTROL1 (1/3): IC101, 201, 501, 701, 704
CONTROL2 (2/3): IC102, 104-106, 108, 202,
203, 205, 206, 302, 402,
502, 503, 702, 703, 901,
902
CONTROL3 (3/3): IC541, 542
DSP: IC103, 107, 204, 603, 1009,
1011
Output A
1 +V
Inverting
2
Input A
- +
Non-Inverting
3
+ -
Input A
-DC Voltage Supply
4 -V
18
（ICブロック図）
REF 7
5V VCC
ENB
5V REF
8
CS
7
REF
6 VCC
3.0V
+
5 OUT
–
FB 2
Dmax
70%
+
–
Vref Vcc Rch
3
14
D7
13 D6
12 D5
11 D4
IN +
4
10 D3
IN --
5
D2
9
D1
8
8
6
OUT
+DC Voltage
8
Supply
Output B
7
Inverting
6
Input B
Non-Inverting
5
Input B
CS
8
6.5 A
0.82V~0.68V
15.5V
+
–
15.5V
0.9mA
+
+
–
–
8.5V~7.9V
0.8V
4V
–
–
–
PWM
+
OSC
FF
RM RT R
QB
0.24V
– S
+
1 3
RT IS +
D7 D6
2 14
1 13
R7 R6
5.83 kΩ 4.12 kΩ
-- --
COM COM
7 6
+
+
7
GND
µPC494GS-T2-A (X8569A00)
Switching Regulator
POWER: IC802
Non-Inv. Inv. Ref Output
Input Input Out Control
16 15 14 13
+
–
ERROR
AMP REFERENCE
2 REGULATOR
ERROR
AMP
+
–
1
0.1V
1 2 3 4
Non-Inv. Inv. Feed- Dead-
Input Input Back Time
Control
VCC
6
UVLO
+
–
16.5V/9V
ENB
5
OUT
OUTPUT
GND
4
Q
12, 11, 10, 9
D1
8
R1
1 kΩ
--
COM
1
+
Vcc C E E
2 2 1
12 11 10 9
OSCILLATOR
5 6 7 8
GND
C R C
T T 1