Circuit Description - Kenwood AR-304 Service Manual

AR-304/KRF-A4020
QQ
3 7 63 1515 0
4. Microprocessor CXP82840-163Q, CXP82832-162Q (X09, IC51)
4-1 Microprocessor periphery block diagram diagram
LED
(STANDBY)
POWER RELAY
SPEAKER A RELAY
SPEAKER B RELAY
TE
L 13942296513
X09, IC3
SELECTOR IC
TC9164AN
REMOCON
SERIAL COMMUNICATION
BUSY
DATA
X09, S516
VOLUME
ENCODER
X09, S518
MULTI
ENCODER
www
X09, S517
SELECTOR
ENCODER .
4

CIRCUIT DESCRIPTION

FL DISPLAY ED51
10-BT-216GK
16SEGMENT
10GRID
X2
X09, IC51
Receiver µ
CXP82840-163Q
(E/T/Q TYPE ONLY)
CXP82832-162Q
(OTHERS)
X2
X2
x ao
y
i
X2
8
KEY
MATRIX
X8
X3
Q Q
3 6 7 1 3
KS0~KS7
K R 0 ( 1 2 )
KS0(81) BASS BOOST
u163
KS1(80) SPEAKER B
KS2(79) SPEAKER A
.
KS3(78) -
KS4(77) -
KS5(76) DSW2(D505)
KS6(75) TAPE2/MONITOR
KS7(74) MUTE
PTY,DISPLAY and TA/NEWS keys are only RDS version(E/T/Q).
2 9 9 4 2 8
X09, IC54
RDS IC
X2
SAA6579/R
(PHILIPS)
E/T/Q TYPE ONLY
X05, IC2
TUNER
X1
LC72131
X3
1 5 0 5 8 2 9 9 4
8.0MHz
CE
RESET
TUNER MUTE
AUDIO MUTE
-10dB ATT
X09, IC2
VOLUME IC
X3
M62492FP
X09, IC52
EEPROM
X2 X24C02
(XICOR)
E/T/Q TYPE ONLY
SD
STEREO
KR0~KR2
m
K R 1 ( 1 3 ) K R 2 ( 1 4 )
S.DIRECT BAND
co
*DIMMER/PTY *P.CALL UP/DISPLAY
POWER *P.CALL DOWN/TA NEWS
- -
- DSW3(507)
DSW1(D504) DSW0(D510)
SOUND AUTO
BALANCE MEMORY
9 9
2 8 9 9