Sony XR-C7220 Service Manual page 26

Q Q
3 7 6 3 1 5 1 5 0
• IC Block Diagrams
– MAIN Board –
IC1 TB2118F (EL)
24 23 22 21 20 19 18 17
+
AMP
VCC
– +
4BIT SWALLOW
COUNTER
REGULATOR
SEEK/RECP SEEK/RECP
+
PRESCALLER
12BIT
PHASE SIG
PROGRAMMABLE
COMPARATOR
COUNTER
40BIT SHIFT
REFERENCE
REGISTER
OSCILLATOR
DIVIDER
18BIT
22BIT
18BIT
ON/OFF
BUFFER
SERIAL I/O
INTERFACE PORT
1 2 3 4 5 6 7 8 9
T E
L 1 3 9 4 2 2 9 6 5 1 3
IC301 CXA2510AQ-T4
30 29 28 27 26 25 24 23 22
120µ/ NR
70µ
T2
+ –
– +
NR BIAS
PBFB1 31
X1
PBRIN1 32
TAPE/AUX
33 F2
PBREF1
TAPE EQ
PBFIN1 34
FWD/RVS
VCT 35
VCT
PBGND VCC
36
+ LPF
+
–
PBFIN2 37
F3
F1
PBREF2 38
X1
PBRIN2 39
PBFB2 40
w w w
OFF/B
T1
120µ/
NR
70µ
1 2 3 4 5 6 7 8 9 10
16 15 14 13
VDD
AMP
20BIT
IF COUNTER
OUTPUT
PORT
10 11 12
IC361 LB1638M
1
GND
21
2
IN1
20 MSMODE
VCC 3
MS
19 DRSW
IN2 4
MODE
18 TAPESW
GND 5
17 INSW
NR
16 NRSW
MODE
15 NC
MS ON/
OFF
DETECT
14
MSOUT
13 DGND
12 MSTC
11 FF
x a o
. i
– 33 –
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IC401 TDA7462D
PAUSE
DETECT
INPUT
GAIN &
SE1L 1
AUTO
SE1R 2
ZERO
MD+ 3
MD– 4
CDL+ 5
CDL– 6
CDR–
7
CDR+ 8
PDR 9
PDGND 10
PDL 11
SE2L 12
INPUT
SE2R 13 GAIN
BEEP
Q Q
3 7 6
CREF 14
IC671 BA3918-V3
10 N.C.
REGULATOR
9 OUT1
8 VS
7 OUT2
OVER VOLTAGE
PROTECT
6 N.C. –
+
2 3 4 5 6 7
1
u 1 6 3
y
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2 4
8 9 9
TREBLE/
LOUDNESS VOLUME
SOFT BASS
CONTROL
CONTROL
MUTE CONTROL
CIRCUIT
CIRCUIT
CIRCUIT
COMPANDER
LOUDNESS
CONTROL
CIRCUIT
SUBWOOFER
DIGITAL CONTROL CIRCUIT
3 1 5 1 5 0 8 9
8 9 10 11 12
m
c o
.
– 34 –
2
8 9 9
28 SE3L
SE3R
27
26 MUTE
25 SDA
24 SCL
23 PAUSE
FRONT
VOICE BANDPASS 22 OUT FL
FADER
HP LP
FRONT
21 OUT FR
FADER
REAR
OUT RL
20
FADER
REAR
19 OUT RR
FADER
FADER
LP
18 SUBOUT+
SUBWOOFER
OUT
17 SUBOUT–
SDA
IIC
SCL
BUS
VDD
16
POWER
2 4 9 8 2 9 9
SUPPLY
15 GND
IC701 BA8270F-E2
BUS ON
14 VCC
BUS ON
1
SWITCH
RESET
RST 2 13 RST
SWITCH
12 BUS ON
11 CLK IN
BATTERY
BATT 3 10 BU IN
SWITCH
4
CLK
VREF 5
DATA 6 9 DATA IN
GND 7 8 DATA OUT