Sharp FO-2970M Service Manual - Page 56
Image signal process block
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FO-2970MU (5) Image signal process block CIS VIDEO SIGNAL CLOCK VREF+ VREF- LC82103 (IC4) Fig. 22 LOCAL BUS ASIC The CIS is driven by the LSI (LC82103), and the output video signal from the CIS in input into the LC82103. The ADC and buffer are provided in the LC82103, and the digital image processing is performed. n. Speaker amplifier The speaker amplifier monitors the line under the on-hook mode, outputs the buzzer sound generated from the SH7041, ringer sound, DTMF generated from the modem, and line sound. o. Adjustment of voice/ringer volume The voice/ringer volume can be adjusted by using the panel buttons "UP" and "DOWN". • The ringer volume can be adjusted in the Stand-by mode by pressing the UP/DOWN button. • The reception level can be adjusted by pressing the UP/DOWN button when the handset is located in the off-hook state. • The speaker volume can be adjusted by using the speaker key. 5 - 20