Description Of Major Ics - JVC MX-G50 Service Manual

MX-G50/MX-G56

Description of major ICs

L4959 (RIC1) : Voltage regulator
1.Pin layout
TAB CONNECTED TO PIN 6
2.Block diagram
2/10
V S
8
EN 8V
7
EN 12V(a)
5
EN 12V(b)
3.Pin function
Pin
1 OUT 12V (b)
2
3 OUT 5.6V
4
5 EN 12V (b)
6
7 EN 12V (a)
8
9
10
11 OUT 12V (a)
1-30
11
10
9
8
7
6
5
4
3
2
1
D97AU716A
REF
GEN
D97AU569C
Pins
12V/1.3A SWITCHED OUTPUT VOLTAGE
V Supply Voltage
S
5.6V/250mA OUTPUT VOLTAGE
N.C. not connected
Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE
GND Ground
Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE
EN 8.6V Enable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
OUT 8.6 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
V Supply Voltage
S
12V/0.8A SWITCHED OUTPUT VOLTAGE
OUT 12V(a)
V
S
OUT 8.6V
EN 8.6V
EN 12V(a)
GND
EN 12V(b)
N.C.
OUT 5.6V
V
S
OUT 12V(b)
5.6V, 250mA
REGULATOR
8.6V, 600mA
REGULATOR
SWITCHED
12V, 800mA
REGULATOR
SWITCHED
12V, 1.3A
REGULATOR
SWITCHED
Description
3
OUT 5.6V
9
OUT 8.6V
11
OUT 12V(a)
1
OUT 12V(b)
GND
6