Audio Signal Flow - Canon ZR70 MC A Service Manual

4-4 Audio Signal Flow

L
MIC
R
L
HEAD
R
PHONE
L
AV
R
JACK
L
EXT
R
MIC
BEEP
FR MI-COM.
+
SPEAKER
−
DRIVER
SPEAKER
< AIF >IC801
Carries out switching between internal and external microphones (by means of serial data from MODE MI-COM),plus ALC (Auto
Level Control), fading, and amplification of various output signals. For the beep tone issued at ejection, etc., the signal from the FR
MI-COM is generated in the circuit and changed over in the AIF.
The microphone amplifier, HPF, ALC, A/D, D/A, and digital I/F circuits are contained in this IC. It is also used for changeover
between ordinary voice sound and beep sound.
< SPEAKER DRIVER >IC802
This integrated circuit is used for speaker drive operation.
IC1102
MACS
IC801
AIF3
MEM IF
SDRAM
L+R
IC802
BEEP
Fig. 2-11
CHAPTER 2. TECHNICAL DESCRIPTION
IC2301
VIC3
CARD IF
CARD
FR
MI-COM.
2-14
ZR70 MC A, ZR65 MC A, ZR60 A
IC2000
VRP2
REC/
PB
HEAD