Sony MDX-C7970 / MDX-C7970R / MDX-C8970 Service Manual ▷ View online
– 65 –
– MAIN Board –
IC100
TDA7427AD
IC102
SAA6588T-118 (MDX-C7970R)
IC250
NJM2360AM (TE2)
LP FM
LP HC
LP AM
VREF
DOUT3
DOUT4
DOUT5
DOUT6
OSCIN
OSCOUT
NC
SCL
SDA
IF AM
LP OUT
VDD2
GND-SIG
NC
FM IN
AM IN
GND-AM
ADDR
VDD1
HFREF
DOUT2
DOUT1/INLOCK
SSTOP
IF FM
3
4
1 2
7 8
5 6
11
12
9
10
15
16
17
18
19
20
21
22
23
24
25
26
27
28
13
14
TEST
LOGIC
PHASE
COM-
PARATOR
CHARGE
PUMP
SWITCH
LP1/LP2
LP1/LP2
INLOCK
DETECTOR
SWITCH
OUT
16 BIT
PROGRAMMABLE
COUNTER
SWITCH
SWM/DIR
SWITCH
SWM/DIR
PRE
COUNTER
SUPPLY &
POWER ON RESET
FM/AM
SWITCH
5 BIT
PROGRAMMABLE
COUNTER
11 BIT
PROGRAMMABLE
COUNTER
11 – 21 BIT
PROGRAMMABLE
COUNTER
IIC BUS
INTERFACE
FM/AM
SWITCH
REFERENCE
OSCILLATOR
14 BIT
PROGRAMMABLE
COUNTER
CONTROL
TIMER
PORT
EXTENSION
+
–
SCOUT
MRO
MPTH
TCON
OSCO
OSCI
VSSD
VDDD
DAVN
SDA
VREF
MPX
VSSA
VDDA
AFIN
MAD
PSWN
SCL
2
1
6
15
11
13
16
14
12
INTERFACE
REGISTER
SIGNAL QUALITY
DECODER
CLOCKED
COMPARATOR
POWER SUPPLY
& RESET
TEST
CONTROL
OSCILLATOR
& CLOCK
PAUSE
DETECTOR
MULTI
PATH
DETECTOR
57kHz
8th ORDER
BAND-PASS FILTER
RDS/RDBS
DECODER
RDS/RDBS
DEMODULATOR
IIC BUS SLAVE
TRANSCEIVER
17
18
CIN
19
LVIN
20
8
7
DATA
CLOCK
DATA
CLOCK
4
4
5
9
10
3
4
5
+
–
–
1
CS
3
CT
4
GND
VREF
1.25V
2
ES
Q1
Q2
8 CD
6 V+
5 INVIN
7 SI
Q
S
R
CT OSC
Ipk
COMP
– 66 –
IC300
TDA7462D013TR
IC600
BA8270F-E2
IC800
BA3918-V3
SE3L
SE3R
MUTE
SDA
SCL
PAUSE
OUT FL
OUT FR
OUT RL
OUT RR
SUBOUT+
SUBOUT–
VDD
GND
CREF
SE1L
SE1R
MD+
MD–
CDL+
CDL–
CDR–
CDR+
PDR
PDGND
PDL
SE2L
SE2R
INPUT
GAIN &
AUTO
ZERO
ZERO
PAUSE
DETECT
INPUT MUL
TIPLEXER &
MIXING ST
AGE
REAR SIDE
SELECTOR
FRONT SIDE
SELECTOR
LOUDNESS
CONTROL
CIRCUIT
INPUT
GAIN
BEEP
LOUDNESS
CONTROL
CIRCUIT
SOFT
MUTE
VOLUME
CONTROL
CIRCUIT
COMPANDER
TREBLE/
BASS
CONTROL
CIRCUIT
SUBWOOFER
OUT
FADER
SUBWOOFER
LP
IIC
BUS
DIGITAL CONTROL CIRCUIT
POWER
SUPPLY
FRONT
FADER
FRONT
FADER
REAR
FADER
REAR
FADER
VOICE BANDPASS
HP
LP
SDA
SCL
1
2
3
4
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
DATA
GND
VCC
RST
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
+
–
+
–
+
–
+
–
OVER VOLTAGE
PROTECT
REGULATOR
1
2 3 4
5
6
7
8
9
10
12
11
NC
MODE2
MODE1
STB
VDD
AMP
VCC
ANT
COM
AM
FM
GND
– 67 –
• Waveforms
– SERVO Board –
– SERVO Board –
1
IC302
@§
(TE) (MD PLAY Mode)
2
IC302
#¢
(FE) (MD PLAY Mode)
3
IC302
#•
(RF) (MD PLAY Mode)
4
IC301
@∞
(LRCK) (MD PLAY Mode)
5
IC301
@§
(XBCK) (MD PLAY Mode)
6
IC501
#¡
(EXTAL) (MD PLAY Mode)
7
IC304
3
(IN) (MD PLAY Mode)
Approx.
0.5 Vp-p
0.5 Vp-p
2.7 Vp-p
0.1
µ
s
Approx.
0.3 Vp-p
0.3 Vp-p
3.5 Vp-p
44 ns
1.2 Vp-p
3.5 Vp-p
23
µ
s
4.5 Vp-p
356
µ
s
– MAIN Board –
1
IC100
9
(OSC IN) (FM/AM (MW) Mode)
2
IC102
5
(OSC1) (FM Mode)
3
IC250
2
SWE (MD PLAY Mode)
4
IC250
3
TC (MD PLAY Mode)
5
IC700
&¢
(XOA)
2.7 Vp-p
94 ns
2.8 Vp-p
224 ns
14.2 Vp-p
24
µ
s
1.1 Vp-p
12
µ
s
2.1 Vp-p
30
µ
s
– 68 –
6
IC700
(£
(X1)
– KEY Board –
1
IC801
@º
(OSC IN)
5.8 Vp-p
271 ns
2.8 Vp-p
3.5
µ
s
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