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MDX-C6400R/C6500R/C6500RX
1818
4-2. BLOCK DIAGRAM – TUNER Section –
1
2
ANT-FM
ANT-AM
53
VSM
56
TUNATT
14
S-METER
10
MPX
8
AM-DET
9
RDS-DET
05
MUTING
Q111
MUTING
CONTROL SWITCH
Q131
MUTING
Q121
D131
FM/AM TUNER UNIT
TU1
MASTER CONTROLLER
IC501 (1/3)
17
SDA (E2PROM)
J1
(FM/AM ANTENNA)
5
VCC (8.5V)
TUNER +8.7V
16
VDD (5V)
TUNER +5.6V
11
VDD E2P (5V)
9
52
MPTH
64
DAVN
RDS DECODER
IC51
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X51
4.332MHz
4
8
5
OSCI
OSCO
SDA
SCL
DAVN
57 kHz
BAND-PASS
FILTER
CLOCKED
COMPARATOR
RDS/RDBS
DEMODULATOR
& DECODER
SIGNAL
QUALITY
DECODER
16
18
19
MPX
CIN
4
5
SC
OUT
MULTI
PATH
DETECTOR
20
2
LVIN
MPTH
50
QUALITY
32
NS MASK
BAND-PASS
FILTER
IC90
Q90
NOISE DET
DISCHARGE
SWITCH
DATA
CLOCK
DATA, CLOCK
(Page 19)
MPX
(Page 19)
E
AM
(Page 19)
F
S-METER
(Page 19)
H
BU B+
E2P SIO
• SIGNAL PATH
: FM
: MW/LW
18
SCL (E2PROM)
10
E2P CKO
SDA (12CBUS)
SCL (12CBUS)
4
FM-AGC
51
FMAGC
BUFFER
Q1
DATA
12 13
IF-AM
19
CLOCK
9
I
IF-AM
(Page 19)
G
10