– 31 –
– 32 –
MDX-C8900R
4-2.
BLOCK DIAGRAM – TUNER Section –
1
4
2
FM-ANT
AM-ANT
6
VCO
21
FM-IF
11
AM-IF
5
9
16
13
6
1
5
20
4 2
25
26
27 28
18
7
VT
24
DOUT
DIN
CLK
XIN
XOUT
CE
PLLSI
PLLSO
PLLCKO
PLLCE
WIDE
AF SEEK
1
53
VSM
40
SD-IN
4
ST-MONO
5
TU-ATT
60
TIR-PLAY
FM OSC
15
AM OSC
IF IN
PD1
NARROW
13
SEEK
14
VDDA
7
VDDD
19
S-METER
S-METER
(RDS)
20
SD
22
18
16
12
4
1
3
2
5
13
15
ST/MONO
FM L-OUT
FM R-OUT
AM DET
23
FM DET
LOW-PASS
FILTER
Q6
TIME CONSTANT
SWITCH
IC7
X1
7.2MHz
FM/AM PLL
IC4
05
• SIGNAL PATH
: FM
: AM
MUTING
Q11
MUTING
Q9
BUFFER
Q4
MUTING
CONTROL SWITCH
Q15
R-CH
R-CH
D500
IC2 (1/2)
IC704
AM/TIR SIGNAL SELECT
SWITCH
IC2
AF ATTENUATOR
SWITCH
IC2
(2/2)
Q702
Q703
D7
D
(Page 33)
CSV
E
(Page 33)
FM
F
(Page 33)
AM/TIR
FM/AM TUNER UNIT
TU1
MASTER CONTROLLER
IC500 (1/4)
+
LO/DX
LO/DX
FM/AM SIGNAL
METER BUFFER
Q5
B+ SWITCH
Q701
SEEKOUT
CN1
ANT
8
FM +B
FM B+
FM B+
10
AM +B
AM B+
AM B+
Q16
TUNER B+
TUNER B+
TUNER B+
9
+B (FM/AM)
WIDE/NARROW
SWITCH
Q13
3
2
R-CH
Q14
WIDE/NARROW
SWITCH
FORCED WIDE/
NARROW
52
MTP
70
RDSSI
71
RDSCKO
75
DAVN
RDS DECODER
IC701
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X701
4.332MHz
4
8
5
OSCI
OSCO
10
9
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
TRAFFIC INFORMATION REPLAY
IC703
SERIAL REGISTER
IC702
L.P.F.
AM
ON
FOUT
AOUT
LIN
FIN
ADIN
A/D
CONVERTER
D/A
CONVERTER
CPU INTERFACE
STATUS
REGISTER
TIMING
CONTROLLER
OSC
DATA I/O
ADPCM
ANALYZER/
SYNTHESIZER
ADDRESS
CONTROLLER
REGISTER
CONTROLLER
CS
SAD
DIN
DOUT
SADX
CE
TIR CE
XTIR CE
TIR RD
TIR WR
TIR D0 –
TIR D3
DI/O
RESET
XT
D0 – D3
BUSY
X702
4.19MHz
1 – 4
82 – 85
97
TIR-CE
95
TIR-BUSY
100
TIR-RES
98 101 96
TIR-D0
–
TIR-D3
CS1
CS2
SAS
RWCK
WE
TAS
RD
WR
CE
PDWN
XT
TAS
SAS
WE
RWCK
TIR-CE
TIR-WR
TIR-RD
99
TIR-PDOWN
FM RDS
S-METER
RV1
+
2
1
7
5
6
3
40
41
39
37
36
46
50
17
23
18
22
16
2
11
15
44
47
48
35
53
5
54
55
56
11
17
18
20
26
19
16
Содержание MDX-C8900R
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Страница 34: ...SUB TRANSLATION board SENSOR board AUDIO board KEY board MAIN board SERVO board Circuit Boards Location 39 ...
Страница 51: ... 71 MDX C8900R 4 22 SCHEMATIC DIAGRAM RELAY Section Page 60 Page 67 ...