10.8. ANALOG CIRCUIT
This circuit performs the setting of the call path/vol. adjustment in each call mode by DSP built in
IC5.
The audio gain of each call is determined by download data from PBX.
- IC5 sends each audio data to IC4 by PCM interface.
- IC5 receives each audio data from IC4 by PCM interface.
1. Handset Call
Transmitting signal is inputted from handset microphone and
amplified by IC4 built-in Amp A/D conversion inputted to IC5 in
PCM data Gain adjustment by DSP of IC5 then sent to PBX.
Transmitting signal inputted from handset microphone is
controlled by transmission switching SW IC7 as below.
IC3-pin 52 L : Handset Call
(IC3-pin 52 H : Headset Call)
Receiving signal inputted from PBX is Gain adjustment by DSP
of IC5 D/A conversion after the input to IC4 in PCM data IC4
built-in Amp output outputted from IC5 built-in Amp to handset.
2. Headset Call
Transmitting signal is inputted from headset microphone and
amplified by IC4 built-in Amp A/D conversion inputted to IC5 in
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Summary of Contents for KX-T7630
Page 4: ...4 ...
Page 8: ...8 1 NO OPERATION Note Refer to 1 5 of WAVEFORM for waveform 8 2 LCD DOES NOT OPERATION 8 ...
Page 9: ...Note Refer to 6 of WAVEFORM for waveform 8 3 HANDSET DOES NOT WORK Receive Send 9 ...
Page 10: ...Note Refer to 7 8 of WAVEFORM for waveform 8 4 HEADSET DOES NOT WORK Receive Send Note 10 ...
Page 27: ...13 CABINET AND ELECTRICAL PARTS LOCATION 27 ...
