Audio Circuit; Monaural Circuit; A2 Stereo Circuit - Sanyo AAI-A Series Training Manual

6. Audio Circuit
The audio circuit of the AA1-A chassis has been designed for use the following circuits.
(1) Monaural circuit
(2) A2 stereo circuit
(3) A2 stereo and Nicam circuit
6-1
The
Monaural circuit
following figure shows a block diagram of the monaural audio peripheral circuits.
CPU
—
47
3
Mute
ICI 01 <TDA8362>
lF/Video/Chroma IC801
45
6
46
7
5
50
1
Audio signal
.,,,,,,,,,,,.
j
~Avl
A.di.
External Audio Input
15:
,J #-@AV2 '"put
1............
CVBS
: SIF
/
4.5MHz frompin39 of
CPU
-
Filtering ~
5,5 MHz from pin38 of CPU
~
Circuit :-
6.OMHz from pin37 of CPU
;~6.5MHz from pin36 of CPU
. ............
..."..............,,:
- S1F Carrier
I
Q857K?858
4udio out
IC1102
Audio 0U@Jt<AN5265s
Audio
output
~1
C"23
Speaker
{
Vol~me Control
Headphone
Q705
-27-
AA1 -A