Casio TE-7000S Service Manual page 77

17. SN74LVU04APWR (IC22)
1
1A
2
1Y
3
2A
2Y 4
3A 5
3Y
6
GND 7
19. XC62EP1902MR (IC5)
CE/CE EXT
5 4
1 2 3
V V NC
SS IN
20. XC6365A363MR (IC4)
V
OUT
CE
(FB)
5
4
2 3
1
EXT/ V GND
DD
VCC
14
6A
13
12 6Y
11
5A
10 5Y
9 4A
8 4Y
V
DD
EXT
Current
OUT
CE
V
OUT
Error Amp
Vref whth
CE
Soft Start,
CE
— 75 —
18. SN751178NSR (IC14)
1B 1 16 V
CC
2 15 1D
1A
1Y
1R 3 14
1DE 4 13 1Z
2R 5 12 2DE
6 11 2Z
2A
H = high level,
L = low level,
2Y
2B 7 10
X = irrelevant,
GND 8 9 2D
Z = high impedance (off)
DIFFERENTIAL INPUTS
H = high level,
L = low level,
? = indeterminate
Limit
Voltage
Reference
Phase
Compensation
PWM
Controler
Ramp Wave
PWM/PFM
Generatpr,
Controler
OSC
OUTPUTS
INPUT ENABLE
D DE
Y Z
H H H L
L H L H
X L Z Z
OUTPUT
A ± B
R
V ID . 0.2 V
H
±0.2 V < V ID < 0.2 V
?
V ID 3 ±0.2 V
L
V
OUT
V
SS
V
DD
Buffer,
EXT/
Drive
GND