Samsung SCH-1900 Service Manual

Also see for SCH-1900: User guide Owner's manual

Samsung SCH-1900 Service Manual Manual pdf 19 page image

Circuit DescriptionSamsung Electronics 4-94-6 Cigarette Lighter Adapter4-6-1 Funtional SpecificationSUMMARYThis standard describes on the specifications ofCLA(Cigarette Lighter Adaptor) for the SCH-1000of SAMSUNG.CLA AS ADAPTOR AND CHARGER¶UAdaptordirectly supplies power in order to operatecellular phone independent of the battery pack.¶UChargerfor the NiMH battery packELECTRICAL SPECIFICATION¶UInput Voltage : 11V to 16.5V DC(normal voltage : 13.5V DC)¶UOutput Current- HHP POWER : supplies 100mA if cellularphone mode is in stand_by state and 300mAto 600mA in carrier_on state.- Battery Charge Current : 390mA +/- 10%(carrier_off) 10ßÃ°æ10ßÃ(carrier_on, full_charge)¶UOutput Voltage (when 2K•ÿ is loaded to thebattery charge terminal)- Battery Charge Terminal : 5.8°æ0.5V- HHP POWER Terminal : 5.8V(+/- 0.3V)¶URipple & Noise : 50mVp-p¶UNormal Fuse Capacity : 250V, 2A¶UCharge Time : 3Hrs. at 850mAh6Hrs. at1500mAhENVIRONMENTAL SPECIFICATION¶UTemperature- Operating Temperature : 0°… to 50°…- Storage Temperature : -20°… to 85°…¶UHumidity- Operating Humidity : 5% to 90%- Storage Humidity : 5% to 95%FUNCTIONS OF CLA¶UProtection CircuitProtection Circuit is the circuit against theelectrical stress which is occured atunexpected conditions of the source power ofCLA unit such as reverse voltage or over-current.¶UDetection of cellular phoneIf cellular phone is connected to CLA, theCLA lamp is on to display whether chargewill be done normaly or not.¶UDetect Carrier-OnIn the case of Carrier-On, CLA detects theresistance of the Cellular Phone and reducesthe charge current.¶UDetect Full-ChargeIf the temperature of the battery pack ishigher than the temperature outside of thecellular phone, CLA detects the battery fullycharged and the state will be converted to theTrickle Charge.CLA CURL CABLE CONNECTIONPIN NO(CLC) Description PIN NO(HHP)#1 HHp Power 12 or 13#2 BATT 16#3 Thermistor 15#4 C/F 3#5 GND 2 or 4 or 6