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9
KX-TCA275CE
4.2.3.
Charge Circuit (Include Charger)
• Charge current is controlled as follows.
• Charge mode is trickle charge.
• Charge current repeats ON and OFF as follows.
• Charge route
DC+ (6.5V)
→
IP1
→
D1
→
R2, R3, R4 and R5
→
CHG+ (Charger)
→
CHG+ (Handset)
→
L2
→
Q2
→
D13
→
IP101
→
Battery
→
GND
→
R5
→
CHG- (Handset)
→
CHG- (Charger)
→
GND
4.2.4.
Battery Low/Power Down Detector
"Battery Low" and "Power Down" are detected by BBIC (IC3) which checks the battery voltage.
The detected voltage is as follows;
• Battery Low
Battery voltage: V(Batt) 3.5V ± 50mV
The BBIC detects this level and "
" starts flashing.
• Power Down
Battery voltage: V(Batt) 3.3V ± 50mV
The BBIC detects this level and power down.
IC3-97pin
Q4
Q3
Q2
Charge ON
Low
OFF
ON
ON
Charge Off
High
ON
OFF
OFF
Summary of Contents for KX-TCA275CE
Page 15: ...15 KX TCA275CE 5 Location of Controls and Components 5 1 Handset ...
Page 16: ...16 KX TCA275CE ...
Page 19: ...19 KX TCA275CE 7 Operating Instructions 7 1 Soft Keys ...
Page 20: ...20 KX TCA275CE ...
Page 21: ...21 KX TCA275CE 7 2 Handset Setting Menu Layout ...
Page 23: ...23 KX TCA275CE 7 5 DISPLAY ...
Page 25: ...25 KX TCA275CE 7 7 Function Keys ...
Page 26: ...26 KX TCA275CE 7 8 Flexible Keys ...
Page 27: ...27 KX TCA275CE 7 9 Caller ID ...
Page 28: ...28 KX TCA275CE 7 10 Character Mode Table ...
Page 31: ...31 KX TCA275CE Charger Unit NO Display On the LCD ...
Page 32: ...32 KX TCA275CE 5V Circuit 8 2 Battery Charge Trouble Handset 8 2 1 Charge On ...
Page 33: ...33 KX TCA275CE 8 2 2 Charge Off ...
Page 34: ...34 KX TCA275CE 8 3 LED Trouble Handset 8 3 1 Key Back Light 8 3 2 Charging And Ringing LED ...
Page 36: ...36 KX TCA275CE 8 6 No Voice Transmission ...
Page 37: ...37 KX TCA275CE 8 7 No Voice Reception 8 7 1 Talk Mode ...
Page 39: ...39 KX TCA275CE 9 Service Fixture Tools ...
Page 46: ...46 KX TCA275CE 4 6 Downloading Start After several seconds Display shows Flash Program Start ...
Page 65: ...65 KX TCA275CE 16 2 Cabinet and electrical Parts Location 16 2 1 Handset ...
Page 66: ...66 KX TCA275CE 16 2 2 Charger Unit ...
Page 67: ...67 KX TCA275CE 16 2 3 Accessories and Packing Materials ...