Samsung SCH-211 Service Manual page 37

Circuit Description
ENVIRONMENTAL SPECIFICATION
Temperature
-Operating temperature : 0oC ~ 50oC
-Storage temperature : -20oC ~ 105oC
Humidity
-Operating humidity : 5% ~ 90%
-Storage humidity : 5% ~ 95%
CLC FUNCTION
Protection circuit
Protection circuit keeps against electronic stress
like over current, and inputting polarity power
promptly in case of occurring unexpected situa-
tion in CLC unit source power.
Function of confirming mobile phone
installation
Function of confirming proper charge process
with turning on lamp in CLC which is connected
with Cellular Phone.
Green : Full charge
Red : Being charge
Function of confirming battery installation
Function of confirming battery installation in cel-
lular phone, then control the CLC activation.
Function of auto power on
Function of turning on Cellular Phone automati-
cally with inserting CLC interface jack into the
phone.
5-9-2 Circuit description of SCH-210
CLC
POWER SUPPLY
This circuit supplies HHP & battery with power
received from Cigar Lighter jack of automobile.
5-16
POWER CIRCUIT OF CHARGE FOR HHP
POWER & BATTERY
This Switching Regulator produces needed power
for charging HHP power & battery, supplied U1,
D1, D2, C1, C2, L1, R25 from Cigar Lighter jack of
automobile.
CONFIRMING CIRCUIT OF EXISTING BAT-
TERY OR NOT
U3A reads separated voltage between resistance
battery C/F and R20, controls no. 5 pin of U1
through reference voltage and comparator then
decides to produce Vcc or not.
CHARGE CURRENT CONTROL CIRCUIT
U2A, U4, Q1 and side circuit detects R4Õs flowing
current, controls no. 5 pin of U1 then charge cur-
rent and charge voltage.
LED ACTIVATING CIRCUIT
LED activating circuit compares to voltage differ-
ence between R4 source and D4 PROP, controls
Q3, Q4 through U2B comparator for Q6 and side
circuit, then activates LED.
AUTO POWER ON CIRCUIT
Q9, Q10 and side circuit makes power on the cir-
cuit allowed Vcc power to no. 9 HHP pin(power
on) by turned on Q9, following up the producing
Vcc.
CONNECTION OF CLC, CURL, AND CABLE
5
4
3
2
1
Pin no (CLC)
#1
#2
#3
#4
#5
Samsung Electronics - Contents may change without notice.
Description Pin no (HHP)
HP-PWR 9
V-BAT 12/13/16
V/F N.C
C/F 3
GND 2/4/6