Circuit Description - Kenwood KR-V8090 Service Manual

1. Microprocessor CXP82840-120Q/CXP82852-107Q(X08-, IC28)
1-1 Microprocessor periphery block diagram
(X08) IC40
RDS
Signal level
RDS clock
RDS data
Selector encoder A
Selector encoder B
Volume encoder A
Volume encoder B
CH SPACE
Remote controller
reception
SL16 / XS8
Serial BUSY
Serial DATA
SD
STEREO
RESET
CE
PROTECT
LOUDNESS
MUTE
-20dB ATT
RELAY POWER
RELAY A
RELAY B
RELAY CS
RELAY TR
1-2 Terminal explanation
No. Name
1 NC
2 NC
3 NC
4 RDS CLK
5 RDS DATA
6 VOL ENC A
7 VOL ENC B
8 REMOCON
9 CH SPACE
10 NC
11 NC
12 SEL ENC A
13 SEL ENC B
14 PLL DO
15 PLL CE
16 PLL CLK
17 PLL DATA

CIRCUIT DESCRIPTION

(X14) ED1
Indicator tube
(11-MT-110GK)
11
(X14) IC1
Indicator tube driver
(uPD16311GC-AB6)
(X08) IC28
u-COM
CXP82840-120Q(K,P,M)
CXP82852-107Q(E,T,Q)
I / O
O
O
– Connects to VDD
I RDS clock signal input
I RDS data signal input
I Volume encoder A input
I Volume encoder B input
I Remote controller data input
I Tuner description switching input
–
–
I Selector encoder A input
I Selector encoder B input
I PLL IF counting value input
O LC72131 (PLL) strobe signal output
O LC72131 (PLL) clock signal output
O LC72131 (PLL) data signal output
1060VR/1070VR/KR-V8090/KR-V9090
MUTE LED
16 STANDBY LED
4
9
Description
(X14)
Key matrix
(X05) IC2
PLL IC
(LC72131)
(X08) IC2,12 (X09) IC3,4
Selector analog
switch control IC
(NJU7311/7312/7313)
(X08) IC5,7,9
Electron volume IC
(TC9412P/9413P)
(X08) IC13
Electron tone
control IC
(TC9184P)
(X08) IC1
Video selector IC
(SN761200N)
(X08) IC26
DSP
(56004)
7