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- DECT BBIC (Base Band IC): IC1
- All data signals (forming/analyzing ACK or CMD signal)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter,
EEPROM, LCD)
- RF Module: IC3
- PLL Oscillator
- Detector
- Compress/Expander
- Amplifier for transmission and reception
- EEPROM: IC2
- Temporary operating parameters (for RF, etc)
Note:
Refer to
EEPROM LAYOUT (HANDSET)
().
22.2. Power Supply Circuit/Reset Circuit
Circuit Operation:
When power on the Handset, the voltage is as follows;
BATTERY(2.2 V ~ 2.6V: TP3) TP14(4V) IC3(6, 27), D3 IC1(37) IC1(39, 63) (2.65V)
The Reset signal generates R19, C23 and 2.65V.
22.3. Charge Circuit
Circuit Operation:
- When charging the handset on the Base Unit, the charge current is as
follows;
DC+(5.5V ~ 6V) D4 R43, R44 (Base)
(Handset) L4 Q2 F1 ... Battery ... BATTERY-
R21 GND L5 CHARGE-(Handset) CHARGE-(Base) GND
DC-(GND)
- When charging the handset on the Charger Unit, the charge current is
as follows;
DC+(5.5V ~ 6V) D1 R1, R2 (Charger Unit) CHARGE
+(Handset) F1 ... Battery ... BATTERY- R21 GND
CHARGE-(Handset) CHARGE-(Charger Unit) GND DC-(GND)
In this way, the BBIC on Handset detects the fact that the battery is charged.
The charge current is controlled by switching Q2 of Handset.
Refer to Fig.101 in
Power Supply Circuit
().
56
www.freeservicemanuals.info
11/8/2014
Digitized in Heiloo, Holland
Содержание KX-A141AXM
Страница 23: ... To exit the operation press any time 23 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 51: ...18 FREQUENCY TABLE MHz 51 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 58: ...25 CPU DATA BASE UNIT 25 1 IC2 BBIC 58 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 74: ...74 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 76: ...76 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 82: ...82 www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...
Страница 104: ...PbF R1 R2 TP4 TP1 TP2 TP3 Digital Volt Meter 12Ω 2W A www freeservicemanuals info 11 8 2014 Digitized in Heiloo Holland ...