Sony DHC-EX77MD / DHC-MD77 / MHC-EX66 / ST-EX77 / ST-EX770 Service Manual ▷ View online
SECTION 4
DIAGRAMS
4-1. IC PIN FUNCTION DESCRIPTION
MAIN BOARD IC201
µ
PD78013FGC-544-AB8 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Function
1
DESTINATION
I
2
DESTINATION
I
Destination selection input.
3
DESTINATION
I
4
DESTINATION
I
5
IF +50
I
Not used. (Ground)
6
IF –50
O
7
BACK UP
I
Back up mode input.
8
NC
–
Not used. (open)
9
Vss
–
Ground
10
POWER
O
Power ON/OFF switch control.
11
MUTE
O
Mute output.
12
ANALOG-BUS
–
13
NC
–
14
NC
–
Not used. (open)
15
AM MONO
–
16
AM/FM
–
17
IFNG
–
18
STEREO
I
Stereo signal input.
19
SIGNAL
I
Tuned signal input.
20
DATA IN
I
Data input. (IC51)
21
DATA OUT
O
Data output. (IC51)
22
CLOCK
O
Clock output. (IC51)
23
CE
O
Chip enable output. (IC51)
24
Vss
–
Ground
25
NC
–
Not used. (open)
26
NC
–
27
ONCE
O
LED drive output (Not used)
28
DAILY
O
29
REC
O
30
SLEEP
O
LED drive output.
31
ENCODER
O
32
NEXT
O
33
ENCODER IN B
I
Encoder input. (B)
34
AU BUS OUT
O
Audio bus output.
35
RESET
I
System reset input.
36
AU BUS IN
I
Audio bus input.
37
ENCODER IN A
I
Encoder input. (A)
38
RDS-CLOCK
I
RDS clock input.
39
RDS-DATA
I
RDS data input.
40
V
DD
–
Power supply 5V.
– 9 –
41
X2
O
System main clock. (10 MHz)
42
X1
I
43
GND
–
Ground
44
XT2
O
System sub clock. (32.768 kHz)
45
XT1
I
46
GND
–
Ground
47
KEY IN K1
I
48
KEY IN K2
I
Key input. (analog)
49
KEY IN
I
50
GND
–
51
GND
–
52
GND
–
Ground
53
GND
–
54
GND
–
55
AV
DD
–
Analog power supply +5V.
56
AV
REF
I
Analog system reference voltage input.
57
GND
–
Ground
58
SDATA
O
Flourescent indicator tube data output. (IC601)
59
SCK
O
Flourescent indicator tube clock output. (IC601)
60
CS
O
Flourescent indicator tube chip select signal output. (IC601)
61
RESET
O
Flourescent indicator tube reset signal output. (IC601)
62
ERRORS
I
63
CORRECTION
O
Not used. (open)
64
RECEIVED
O
Pin No.
Pin Name
I/O
Function
– 10 –
– 20 –
•
Waveforms
1
IC51
1
2
IC201
$™
3.1Vp-p
10 MHz
2.4 Vp-p
4.5 MHz
3
IC201
$∞
1.8 Vp-p
32.768 kHz
4
IC302
!£
2.8 Vp-p
4.332 MHz
•
IC Block Diagrams
IC1
LA1835
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
S METER
LEVEL
DET
FM
IF
AM
DET
S-CURVE
AM/FM
IF
BUFF
REG
TUNING
DRIVE
COMP
GND
AM/FM
SW
VCC
PHASE
DET
PILOT
DET
VCO
FF
STEREO
DRIVE
TRIG
STEREO
SW
MUTE
FF
FF
FM
IF
FM
DET
DECODER
ANTI BIRDIE
1
2 3
4
5
6
7
8
9
10
20
19
18
17 16
15
14
13
12
11
21
22
23
24
25
26
27
28
29
30
FM-SD
AM-OSC
FM-AFC
AM-RF-IN
AGC
AM. CUT
AM/FM
VCO
MPX-IN
OUT R
OUT L
AMP-IN R
AMP-IN L
R
L
VCO-STOP
ST-LED
AM/FM
AM. SD
AM. SD
IF-BUFF
VCC
DET
FM-IN
AM-MIX
IF
REG
AM-IF
GND
TU-LED
FM
AM
– 21 –
PHASE DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
C
2
B
I/F
1
2
3 4 5 6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
21
22
23
24
XOUT
VSS
AOUT2
AIN2
PD2
PD1
AIN1
AOUT1
VDD
FMIN
AMIN
IO2
XIN
D0
CL
D1
CE
BO5
BO1
BO2
BO3
BO4
IO1
IFIN
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
IC51
LC72130
IC302
SAA6579
QUALITY BIT
GENERATOR
OSCILLATOR
AND
DIVIDER
RECONSTRUCTION
FILTER
57KHz
BANDPASS
(8th ORDER)
ANTI-
ALIASING
FILTER
DIFFERENTIAL
DECODER
BIPHASE
SYMBOL
SYMBOL
DECODER
COSTAS LOOP
VARIABLE AND
FIXED DIVIDER
FIXED DIVIDER
CLOCK REGENERATION
AND SYNC
REFERENCE
VOLTAGE
TEST LOGIC AND OUTPUT
SELECTOT SWITCH
CLOCKED
COMPARATOR
9
10
16
15
12
11
1
2
3
4
5
6
7
8
14
13
QUAL
RDDA
Vref
MUX
VDDA
VSSA
CIN
SCOUT
TSTLD
TEST
VSSD
VDDB
OSCI
OSCO
T57
RDCL
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