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KRC-851D
CIRCUIT DESCRIPTION
SYNTHESIZER
UNIT (X14-285)
Q83
_|_ LOUD SW driver
Q84
_i Ripple
filter
Q85
j VOL.
boost
SW driver
Q86 ,87
Audio
mute
driver
Q88 ,89
| DOLBY NR control
Q90-92
| ACC detection
iC]
'
FRONT
PREAMP
{C2
i
REAR PREAMP
{c3
: Analog
SW
*
1C4
__tsolation
amp _
{c5-7
'a Buffer
amp
Signal selection
EXT.MUTE SW
|
FM IF amp/ DET.
FM
MPX / NC
SOK
;
|
Buffer amp
RESET
FM
IF amp —
$0 buffer
|
MPX buffer
cRSC SW
AFC SW
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