Pioneer KEX-900 Service Manual page 16

1.4 —> Gi-/ 8/871, 4 > Gia] e/ 8)
® Block Diagram (KEX-500)
16
TUNER
PRE AMP
P
CASSETTE
MECHANISM
MOTOR
REMOTE
CONTROL
INPUT
Ic601
PQ\3 INPUT
308
SWITCH
IC301
pico NR
DRIVER UNIT
DRIVER
$951,S953~960
KEY MATRIX
$901~910
KEY MATRIX
S909 : VACANT---+ KEX-SO0/EW
VOLUME UNIT
BASS
TREBLE
( onsorF )
37
(704)
17
VOLUME UNIT
BALANCE
IC701
DECK
CONT.
Ic901
SYSTEM
DISP
CONT.
IC602
E.VOLUME
60 (SK)
(UL SURa SARACEN)
27 ~50 (G1~11, P1~14)
33 (SCK)
34(SI)
35 (SO)
3(SCK)
4(Tr B)
5(Tr C)
55(ST),59(AUC),
51(VLOAD)
Q851, 853,855
ISOLATOR
DATA COMMUNICATION
1C704
ANTI THEFT(RAM)
FL TUBE
DC-DC CONVERTER
TO
TUNER
Fig.
I
F A STO GES OE OE TE PO ER See NE eR Ne PE UY Rae SS