JVC KV-DV7, Service Manual

Page: 14 / 37

KV-DV7
1-14
BA4901A-V3 (IC911) : Regulator
VCC-C
VCC-B
A
CC5V
AC
C.
IN
VDD5V
9V
CDBV
CTRL
MEMOR
Y
.IN
10V
AJ
GND
1 2 3 4 5 6 7 8 9
10 11 12
VCC-C
VCC-B
ACC5V
ACC.IN
VDD5V
9V
CDBV
CTRL
MEMORY.IN
10V
AJ
GND
Pin No. Symbol Descriptions
1
2
3
4
5
6
7
8
9
10
11
12
To be connected with the collector of PNP.
To be connected with the base of PNP.
A voltage supply for ACC block.
Control of the COMP output by inputting voltage.
Output voltage level is 5.7V, and max output current is 100mA.
This voltage supply is for microcomputer. Whenever backup voltage
supply is connected, the output keeps on running.
This output voltage is 9.0V, and max output current is 500mA.
This voltage supply for AUDIO.
This output voltage is 8.0V, and max output current is 1A
This voltage supply for CD.
Output selector of CD, AUDIO, ILM and Vcc-B.
To be connected with the BACKUP of car
This output voltage is 10V, and max output current is 500mA.
Output voltage is adjustable.
Putting a resistance between ILM and AJ or between AJ and GND males
ILM output voltage adjustable.
Connect to GND
1. Pin layout
2.Pin Function
LM2596S-ADJ-W (IC951) : Regulator
1 5
~
CURRENT
SOURCE
BIAS
1.235V
REFERENCE
2.5V
REGULATOR
START
UP
ON/OFF
2.5V
GM
AMP
R2
R1=2.5k
ACTIVE
CAPACITOR
COMP.
FREQ. SHIFT
RESET
LATCH
150kHz
OSC.
OP AMP
FEEDBACK
220mV
200mV
3A
SWITCH
COMP.
COMP.
CURRENT
LIMIT
DRIVER
THERMAL
LIMIT
VIN
OUTPUT
GND
3.3V, R2 = 4.2k
5V, R2 = 7.5k
12V, R2 = 21.8k
ADJ, R2 = 0
R1 = OPEN
1. Pin layout 2. Block diagram