Amplifier for Auto Level Control
PCM Codec (IC601)
Power Supply Voltage: 3.3V
Clock Frequency: Contains a built-in PLL function and generates a clock from the BCLK (256 KHz).
Contains an amplifier, LPF, gain adjustment, AD/DA converter, host I/F, PCM serial I/F and speaker
output function.
Flow of Sound Signal
[Microphone sound]
1. The sound data input from pin 1 of the built-in microphone connector
(CN607) is amplified by the amplifier in the PCM Codec (IC601) and the
ALC (IC603), then input as the built-in microphone to the PCM Codec
(IC601) again.
When the level of the input sound signal is more than the specified
value, the gain is changed and the output signal level is kept constant
at the ALC (IC603). Sound distortion is controlled when the input is
excessive.
2. When the external microphone is attached to the microphone jack
(CN603), the sound signal input from pin 2 of the CN603 is amplified by
the amplifier in the PCM Codec (IC601) and the ALC (IC602), then input
as the external (microphone) to the PCM Codec (IC601) again
The ALC (IC602) works in the same way as the IC603.
3. In the PCM Codec (IC601), after the sound signal is switched between
the built-in microphone and the external microphone by a register
setting from the host, amplification, AD conversion and gain
adjustment are performed.
The sampling frequency of the A/D conversion is 8kHz and it is
converted to the PCM in the format of 8bit and law. Then, 64kbps
data are output to the ASIC (101) through the Serial I/F.
The data transfer of the Serial I/F is BCLK (256 kHz).
4. The data compression of 32kbps is performed in the ADPCM Block of
the ASIC (101) and the data transferred as sound data.
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Summary of Contents for OneHome KX-HCM110A
Page 3: ...1 2 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED MAIN BOARD I O BOARD 3 ...
Page 4: ...CAMERA BOARD 4 ...
Page 13: ...6 3 BOTTOM VIEW 6 4 REAR VIEW 13 ...
Page 25: ...6 Remove FFC Cable from Main Board and I O Board 8 2 HOW TO REMOVE EYE BLOCK 25 ...
Page 31: ...31 ...
Page 32: ...32 ...
Page 33: ...9 5 CAUTIONS FOR PLASTIC PATS ATTACHMENT 33 ...
Page 34: ...10 TROUBLE SHOUTING 10 1 BASIC OPERATION 34 ...
Page 35: ...10 2 CHECK FOR OTHER FUNCTION 35 ...
Page 36: ...10 3 CHECK FOR SCREEN BLOCK 36 ...
Page 37: ...10 4 CHECK FOR SOUND BLOCK 37 ...
Page 38: ...10 4 1 Built in Microphone 38 ...
Page 39: ...10 4 2 External Microphone 10 4 3 Speaker Output 39 ...
Page 41: ...10 5 CHECK FOR MOTOR DRIVING BLOCK 10 5 1 Check For The Action Of Pan 41 ...
Page 42: ...10 5 2 Check For The Action Of Tilt 42 ...
Page 43: ...10 6 CHECK FOR POWER SUPPLY BLOCK 43 ...
Page 44: ...44 ...
Page 45: ...10 7 CHECK FOR RTC CIRCUIT 10 8 CHECK FOR I O TERMINAL 45 ...
Page 46: ...10 9 CHECK FOR LED CIRCUIT 46 ...
Page 47: ...10 10 CHECK FOR INITIALIZATION 47 ...
Page 61: ...16 CABINET AND ELECTRICAL PARTS LOCATION 17 ACCESSORIES AND PACKING MATERIALS 61 ...
Page 62: ...18 REPLACEMENT PARTS LIST Note 62 ...
Page 66: ...C132 ECUV1C104ZFV 0 1 66 ...
Page 68: ...C401 F2B1E1020001 1000 68 ...
Page 70: ...R111 ERJ3GEYJ103 10k 70 ...
Page 72: ...R326 ERJ3GEYJ104 100k 72 ...
Page 84: ...A B C D E F G J K ...
Page 85: ...O L N M Q P R1 R2 ...
Page 86: ...R3 S1 S3 S2 T2 T1 U1 U2 T3 10Base Hub Connection un communicating ...