MDX-C7970/C7970R
– 25 –
– 26 –
4-2.
BLOCK DIAGRAM – TUNER Section –
1
4
2
FM-ANT
AM-ANT
6
VCO
21
FM/AM-IF
20
SD
5
5
28
3
24
10
16
9
13 12
69
100
15
68
VT
13
AM OSC
24
DATA
CLOCK
SSTOP
SDA
OSCOUT
OSCIN
SCL
SSTOP
BAND (9K-10K)
WIDE
53
S-METER (VSM)
SD-IN
83
ST-MONO
62
TU-ATT
LP AM
2
LP HC
1
LP FM
LP OUT
FM IN
25
AM IN
IF FM
14
IF AM
NARROW
51
QUALITY
35
NS-MASK
14
VDDA
7
VDDD
81
19
S-METER
15
S-METER (RDS)
18
16
12
FM-LCH
FM-RCH
(C7970R)
(C7970R)
AM-DET
23
FM-DET
FILTER
AM OSC
BUFFER
Q4
X1
10.25MHz
FM/AM PLL
IC100
05
• SIGNAL PATH
: FM
: AM (MW/LW)
MUTING
Q101
BUFFER
Q50
MUTING
CONTROL SWITCH
Q103
BAND-PASS
FILTER
IC101
R-CH
R-CH
D5
FM/AM TUNER UNIT
TU1
MASTER CONTROLLER
IC700 (1/4)
LO/DX
11
SEEK
13
SEEK
22
ST/MONO
SEEK
FM/AM SIGNAL
METER BUFFER
Q1
B+ SWITCH
Q51
J1
(FM/AM ANTENNA)
8
FM +B
FM B+
FM B+
10
AM +B
AM B+
TUNER B+
5V
9
+B
WIDE/NARROW
SWITCH
Q7
66
82
Q8
WIDE/
NARROW
SWITCH
WIDE/NARROW
52
MPDH (MTP)
67
DAVN
RDS DECODER
IC102
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X2
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
Q5
NOISE DET
DISCHARGE
SWITCH
FM RDS
S-METER
RV1
(C7970: E model)
(C7970R)
(C7970)
(C7970)
(C7970R)
(C7970)
(C7970)
(C7970)
(C7970R)
21
FM-IF
(C7970R)
11
AM-IF
(C7970R)
DATA
CLOCK
DATA, CLOCK
(Page 27)
G
FM
(Page 27)
E
AM
(Page 27)
F
S701
MW 10K/FM 200K
MW 9K/FM 50K
FREQUENCY SELECT
SEEKOUT
Summary of Contents for MDX-C7970/C7970R
Page 4: ... 4 SECTION 1 GENERAL This section is extracted from instruction manual ...
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Page 41: ... 61 4 20 SCHEMATIC DIAGRAM SUB Board MDX C7970 C7970R Page 54 Page 57 ...
Page 48: ... 68 6 IC700 X1 KEY Board 1 IC801 º OSC IN 5 8 Vp p 271 ns 2 8 Vp p 3 5 µs ...