Sharp FO-2970M, Service Manual

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FO-2970MU
5 – 20
(5) Image signal process block
CIS
VIDEO
SIGNAL
LC82103
ASIC
LOCAL
BUS
(IC4)
CLOCK
VREF+
VREF–
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, out-
puts 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.
Fig. 22