Samsung SCH-2000, Руководство по обслуживанию, Страница: 18 / 97

Circuit Description
4-8 Samsung Electronics
LED INDICATION
¶U
AC plug in : red and green orange at 0.5 sec
intervals
¶U
Slot Identification
- Front slot : LED “ PHONE”
- Rear slot : LED "BATT”
¶U
Charging Status
- Constant Red : Rapid charging
- Constant Green : Rapid charging is terminated.
- Constant Orange : Under or Over Temperature
- Flashing Orange
*If charging is started with any battery of open
cell, equivalent LED should be flashing
Orange.
*If a battery of open cell is loaded on rear slot
whole front slot is charging, the other good
battery.
LED for front slot - Constant RED
LED fro rear slot - flashing Orange
*If a battery of open cell is loaded on front slot
while rear slot charging, the other good
battery.
LED for front slot - flashing Orange
LED for rear slot - constant RED
- Off : battery unloaded
4-5-3 General Characteristics
TEMPERATURE
¶U
Charging Temperature Range : 0 to 45
°
∆
C
¶U
Storage Temperature Range : -20 to 85
°
∆
C
SAFETY REQUIREMENTS
¶U
Safety Approval
- Approval No. : UL and CUL, FCC Class B
- Approval No. should be appeared in label
design.
PRIMARY - SECONDARY ISOLATION
¶U
Withstanding Voltage : 3K Vdc for 1 sec
¶U
Cut-off Current : 10mA
BURN -IN
¶U
All power supply shall be subjected to the burn -
in process
- Temperature : 35
°
∆
C
°æ
5
°
∆
C
- Load condition : 600mA and 150mA
- Input Voltage : nominal 110Vac
4-5-4 Schematic Description
BATTERY RECOGNITION CIRCUIT : HIC
¶U
Battery identity detection determined to voltage
through R4, R6, R11, R12.
¶U
Battery internal between C/F and GND.
CURRENT DETECTION CIRCUIT : R5, R6,
R11, R12, HIC
¶U
Battery charging current is changed voltage
detection.
¶U
This voltage inputted u-COM to 16 times
amplified through HIC.
VOLTAGE DETECTION CIRCUIT : HIC
u-COM A/D through HIC pin 12, 13 detected
voltage.
BATTERY TEMPERATURE DETECTION
CIRCUIT : HIC, TH1
Battery temperature detection determined
temperature by use of thermistor resistor variation
of TH1 by HIC.
CURRENT LIMIT CIRCUIT : HIC
When soft-change, current detection circuit limited
current flow to battery, reference voltage more
than detected current, detected current and HIC
internal reference voltage.