Circuit Description
6-8
Samsung Electronics - Contents may change without notice.
CURRENT DETECTION CIRCUIT : R5, R6,
R11, R12, HIC
Battery charging current is changed voltage
through R5, R6, R11, R12. This voltage inputed
u-COM to 16 times amplifiered through HIC.
VOLTAGE DETECTION CIRCUIT : HIC
u-COM A/D through HIC pin 12, 13 detected
voltage.
BATTERY TEMPERATURE DETECTION
CIRCUIT : HIC, TH1
Battery temperature detection determined
temperature by ues of thermistor registor variation
of THI by HIC.
CURRENT LIMIT CIRCUIT : HIC
When soft-change, current detection circuit
limited current flow to battery, reference voltage
more than detected current, detected current and
HIC internal reference voltage.
6-5 Hands-Free Kit
6-5-1 Charging Circuit
A constant voltage is used for the hands-free kit.
This circuit converts DC 12V input current to 8.4V
DC to charge the battery. When the battery is fully
charged, the charge current drops and the circuit
operates as a constant voltage.
6-5-2 u-Processor
Micro processor controls charging power and
charging current to protect the phone. It also
allows to communicate with a HHP, and to
convert from hands-free mode to private mode,
and vice verse. It adjusts speaker volume at 8 steps
and attenuates echo and noise occurred during
conversation.
6-5-3 Speaker circuit
This circuit eliminates HHP noise, and controls
the sound quality and speaker volume using
analog C-mos IC which checks the speaker signal
up to 8 steps. 5W audio amplifier amplifies the
speaker signal.
6-5-4 Microphone Circuit
This circuit separates ground to eliminate the
noise occurring from the HHP antenna and
microphone. u-processor controls this circuit to
attenuate echo which may occur in Land side.
Summary of Contents for SCH-210
Page 2: ...Samsung Electronics Co Ltd GH68 60756A ...
Page 4: ...1 2 Samsung Electronics Contents may change without notice General Introduction ...
Page 10: ...Specification 2 6 Samsung Electronics Contents may change without notice ...
Page 16: ...Installation 3 6 Samsung Electronics Contents may change without notice ...
Page 22: ...4 6 Samsung Electronics Contents may change without notice NAM Programming ...
Page 52: ...Troubleshooting 7 8 Samsung Electronics Contents may change without notice 7 2 2 CDMA Mode ...
Page 54: ...Troubleshooting 7 10 Samsung Electronics Contents may change without notice ...
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Page 68: ...8 14 Samsung Electronics Contents may change without notice Exploded View and its Parts List ...
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Page 100: ...Electrical Parts List 10 24 Samsung Electronics Contents may change without notice ...
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Page 102: ...11 2 Rapid Desk Top Charger Block Diagram DTC58 ...
Page 103: ...11 3 Hands free Kit Block Diagram ...
Page 104: ......
Page 105: ...11 4 Rapid Travel Charger Block Diagram ...
Page 106: ...11 5 CLA Cigarette Lighter Adaptor Block Diagram ...
Page 107: ...11 6 Logic Circuit Diagram ...
Page 108: ...11 7 Receiver Circuit Diagram ...
Page 109: ...11 8 Transmitter Circuit Diagram ...
Page 110: ...11 9 Desk Top Rapid Charger Circuit Diagram ...
Page 111: ...11 10 Hands Free Circuit Diagram ...
Page 112: ...11 10 1 Power Circuit Diagram ...
Page 113: ...11 10 2 Holder Circuit Diagram ...
Page 114: ...11 10 3 COMM CONT Circuit Diagram ...
Page 115: ...11 10 4 Audio Amp Circuit Diagram ...
Page 116: ...11 11 Cradle Circuit Diagram ...
Page 117: ...11 12 Car Adaptor Circuit Diagram ...
Page 118: ...11 13 Rapid Trvel Charger Circuit Diagram ...
Page 119: ...11 14 CLA Cigarette Lighter Adaptor Circuit Diagram ...