Programmes After Market Services (PAMS) Technical Documentation DESKTOP CHARGER CHH–2
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 AMENDMENT RECORD SHEET Amendment Number Original 26/97 Date Inserted By Comments Page 2
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Desktop Charger CHH–2 Contents Desktop Charger CHH–2 General Technical Summary Operation Charging Indication Technical Specifications Charge States and Charge Control External Signals and Connections Circuit Description Control Logic Prosessor Input/Output Signals Processor A/D Inputs Charging the Spare Battery Discharging the Spare Battery Watchdog Circuit Block Diagram Circuit Diagram Layout and Foil Diagrams Parts List Code: 0200184 Exploded View
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Desktop Charger CHH–2 Related Documentation General The CHH–2 desktop charger is designed for the charging of the handportable phone and a spare battery. In a standard configuration rapid charging is possible by connecting the desktop charger to an ac power outlet via a suitable constant current ac adapter (ACH–4). This must be connected to the d.c. connector, X130. Technical Summary Operation The device has a d.c.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Charging Indication Charge is indicated with two dual–colors led‘s, one for the phone and one for the extra battery pack. The liquid–crystal display of the phone also contains a three–bar battery display. Led‘s are dim when there is no phone or extra battery connected. Right led for handportable: Red phone led indicates a fast charge mode of the phone battery.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 External Signals and Connections The charger has three external connectors, the AC fast travel charger connector, the phone charging connector and the spare battery connector.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Circuit Description The DC2 desktop charger module consists of microcomputer based control logic for spare battery charging and discharging. It also has power outlet for transportable phone. Control Logic Charging is controlled by processor D150. It is a single–chip type controller incorporating RAM, ROM, A/D converter, and a multifunction timer/counter.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 AN5/CHVOL Charger voltage detection AN7/LIREF Lithium reference voltage input • range: 0...5 V • resolution: 19.5 mV/bit Charging the Spare Battery Charging current for the spare battery is fed in via switching transistor V130 and Schottky diode V131. The transistor is controlled by the processor (BSW line). When the transistor is on, a constant current is supplied to the battery. This is the rapid charging mode.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Watchdog Circuit The processor generates positive pulses to output PC7 (pin 18). These pulses are received by transistor V201 discharging capacitor C161. The capacitor is charged through resistor R163. This voltage is fed to regulator N100 shutdown input (pin 3) through transistor V162.The 5V reference supply is generated by regulator N100.If the processor stops the voltage across the capacitor increases and the regulator is switched off.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Block Diagram PHONE CHARGING CONNECTOR (X110) 800mA OUT VC PDET/GND R GND RAPID CHARGER CONNECTOR (X130) 1 3 2 GND PHONE CHARGE INDICATION RED/GREEN LED MICROPROCESSOR/CONTROL LOGIC SPARE BATTERY CONNECTOR (X120) VBAT BSI BTEMP GND A/D–INPUTS D–OUTPUTS PHONE DETECT CHARGE CONTROL CHARGER VOLTAGE PHONE LED1 BATTERY VOLTAGE PHONE LED2 BATTERY SIZE SPARE BAT.LED1 BATTERY TEMP. SPARE BAT.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Circuit Diagram Original 26/97 Page 11
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Layout and Foil Diagrams Original 26/97 Page 12
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Parts List Code: 0200184 ITEM CODE DESCRIPTION R100 R106 R107 R108 R109 R110 R111 R117 R130 R131 R132 R133 R134 R135 R136 R138 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R160 R161 R162 R163 R164 R170 R171 R172 1413603 1412286 1411669 1411669 1415872 1415872 1430073 1413829 1413603 1412310 1414029 1412310 1412310 1412430 1413603 1413603 1416160 1416040 1413603 1416160 1416202 1412609 1413603 1
PAMS Technical Documentation R181 R182 R183 R184 R185 R186 R187 R188 R191 R192 R193 R198 C102 C103 C104 C105 C129 C130 C131 C132 C133 C134 C135 C136 C137 C140 C141 C142 C143 C150 C151 C152 C153 C154 C155 C160 C161 C170 B150 V114 V129 V130 V131 V132 V134 V140 V141 V152 1415576 1415576 1415576 1415576 1415576 1415576 1415576 1415576 1416107 1416040 1411490 1411490 2604209 2307816 2308697 2604110 2310336 2310336 2310336 2310336 2310336 2307816 2310336 2310336 2310336 2307816 2307816 2307816 2307816 2307816 23
PAMS Technical Documentation V153 V154 V155 V162 V170 V181 V182 V183 V184 V185 V201 D150 N100 N140 S130 X120 X130 4200917 4200917 4200917 4200917 4100567 4864378 4864380 4864378 4864380 4864380 4200917 4340034 4301062 4309576 5200914 5431702 5407088 9560020 9853917 Original 26/97 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Sch.
PAMS Technical Documentation NHB–3 Desktop Charger CHH–2 Exploded View Assembly Parts ITEM 1 2 3 4 5 6 7 8 C1 Q’TY 4 3 Original 26/97 CODE DESCRIPTION VALUE, TYPE 9460089 9450259 5461000 9460088 9450260 6501067 6293012 9380154 0200184 Discharge button Front cover Battery connector Light guide Bottom cover Adhesive foot PT screw Label blank Charging module DC2 4D 22992 1D 22990 1x04 3D 22993 1D 22991 d=8.0 h=2.
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