22 CIRCUIT OPERATION (CORDLESS HANDSET)
22.1. Outline
Cordless Handset consists of the following ICs as shown in BLOCK DIAGRAM (CORDLESS HANDSET) (P.78).
•
•
•
•
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
•
•
•
•
AMP: IC2
−
−
−
−
Single OP_AMP for SP
•
•
•
•
MIDI (Musical Instrument Digital Interface): IC4
−
−
−
−
16-Tone 32-Poly PCM Sound Generator
−
−
−
−
Port (LED direct driver with PWM)
•
•
•
•
EEPROM: IC10
−
−
−
−
Temporary operating parameters (for RF, etc.)
Refer to EEPROM LAYOUT (CORDLESS HANDSET) (P.91).
22.2. Power Supply Circuit/Reset Circuit
Circuit Operation:
When power on the Cordless Handset, the voltage is as follows;
BATTERY(2.2 V ~ 2.6V: J1)
→
L1, D1, Q2 (1.8V)
→
Q3 (2.7V)
→
Q1 (4.0V)
The Reset signal generates IC1 (78) and 1.8V.
22.3. Charge Circuit
Circuit Operation:
When charging the cordless handset on the Base Unit, the charge current is as follows;
DC+(5.5V ~ 6V)
→
D1
→
R4, R5
→
(Base)
→
(Cordless Handset)
→
L4
→
Q4
→
D7
→
F1
→
... Battery ... BATTERY-
→
R43
→
GND
→
CHARGE-(Cordless Handset)
→
CHARGE-(Base)
→
GND
→
DC-(GND)
In this way, the BBIC on Cordless Handset detects the fact that the battery is charged.
The charge current is controlled by switching Q5 of Cordless Handset.
Refer to Fig.101 in Power Supply Circuit (P.76).
22.4. Battery Low/Power Down Detector
Circuit Operation:
"Battery Low" and "Power Down" are detected by BBIC which check the voltage from battery.
The detected voltage is as follows;
•
•
•
•
Battery Low
Battery voltage: V(Batt)
2.3V ± 50mV
The BBIC detects this level and "
" starts flashing.
•
•
•
•
Power Down
Battery voltage: V(Batt)
2.2V ± 50mV
The BBIC detects this level and power down.
Refer to Adjustment (Cordless Handset) (P.66).
22.5. Speakerphone and Headset Jack
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm. IC2 is used to switch off the telephone
loudspeaker and is used to amplify the signal to drive the hands-free loudspeaker. They are selected using the SP_AMP line
from pin 70 of the BBIC. 2.5mm headset jack is also available.
79
KX-TCD530AXM / KX-TCA151AXM
Содержание KX-TCA151AXM
Страница 11: ...5 LOCATION OF CONTROLS 5 1 Base Unit 11 KX TCD530AXM KX TCA151AXM ...
Страница 12: ...5 2 Cordless Handset 5 3 Charger Unit 12 KX TCD530AXM KX TCA151AXM ...
Страница 13: ...5 4 Icons above SOFT KEYS 5 4 1 Base Unit 5 4 2 Cordless Handset 13 KX TCD530AXM KX TCA151AXM ...
Страница 16: ...6 2 2 Base Unit 6 2 3 Cordless Handset 16 KX TCD530AXM KX TCA151AXM ...
Страница 17: ...6 3 Setting the Ringer Volume 6 3 1 Base Unit 6 3 2 Cordless Handset 17 KX TCD530AXM KX TCA151AXM ...
Страница 18: ...6 4 Settings Menu Chart 6 4 1 Base Unit 6 4 2 Cordless Handset 18 KX TCD530AXM KX TCA151AXM ...
Страница 30: ...30 KX TCD530AXM KX TCA151AXM ...
Страница 32: ...8 OPERATIONS 8 1 Power ON OFF 8 2 Setting the Date and Time 32 KX TCD530AXM KX TCA151AXM ...
Страница 36: ...Cross Reference Phonebook Character Table P 37 8 4 2 Entering Names Characters 36 KX TCD530AXM KX TCA151AXM ...
Страница 37: ...8 4 3 Phonebook Character Table 37 KX TCD530AXM KX TCA151AXM ...
Страница 38: ...8 4 4 Storing the Number in the Handset Phonebook 38 KX TCD530AXM KX TCA151AXM ...
Страница 39: ...8 4 5 Hot Keys Speed Dial 39 KX TCD530AXM KX TCA151AXM ...
Страница 41: ...41 KX TCD530AXM KX TCA151AXM ...
Страница 43: ...43 KX TCD530AXM KX TCA151AXM ...
Страница 44: ...8 6 Base Unit Selection 44 KX TCD530AXM KX TCA151AXM ...
Страница 51: ...10 3 Check Link 10 3 1 Base Unit 51 KX TCD530AXM KX TCA151AXM ...
Страница 52: ...Cross Reference Power Supply Circuit Reset Circuit P 79 Adjustment Base Unit P 59 52 KX TCD530AXM KX TCA151AXM ...
Страница 53: ...10 3 2 Cordless Handset 53 KX TCD530AXM KX TCA151AXM ...
Страница 81: ...24 SIGNAL ROUTE 81 KX TCD530AXM KX TCA151AXM ...
Страница 94: ...30 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 94 KX TCD530AXM KX TCA151AXM ...
Страница 95: ...31 CABINET AND ELECTRICAL PARTS LOCATION CORDLESS HANDSET 95 KX TCD530AXM KX TCA151AXM ...
Страница 96: ...32 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 96 KX TCD530AXM KX TCA151AXM ...
Страница 97: ...33 ACCESSORIES AND PACKING MATERIALS 33 1 KX TCD530AXM 97 KX TCD530AXM KX TCA151AXM ...
Страница 98: ...33 2 KX TCA151AXM 98 KX TCD530AXM KX TCA151AXM ...
Страница 107: ...36 3 Memo 107 KX TCD530AXM KX TCA151AXM ...
Страница 111: ...37 3 Memo 111 KX TCD530AXM KX TCA151AXM ...