Sony HCD-ED2 Service Manual ▷ View online
29
• RDS Board
IC451 BU1922
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
BIPHASE
SYMBOL
SYMBOL
DECODER
OSCILLATOR
AND
DIVIDER
57kHz
BANDPASS
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
FIXED DIVIDER
REFERENCE
VOLTAGE
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
RECONSTRUCTION
FILTER
14
15
16
13
12
11
10
9
3
2
1
4
5
6
7
8
CLOCK REGENERATION
AND SYNC
VP1
RDCL
TS7
OSCO
OSCI
V
DDD
V
SSD
TEST
TSTL
D
QUAL
RDDA
Vref
MUX
V
DDA
V
SSA
CIN
SCOUT
• TAPE PREAMP Board
IC191 BA6218
1
2
3
4
6
5
9
8
7
A OUT
POW
GND
B OUT
A IN
GND
B IN
NC
GND
VCC
30
Pin No.
Pin Name
I/O
Function
1
GND
I
GND
2
XOUT
O
8MHz Oscillator
3
XIN
I
8MHz Oscillator
4
RESET
I
CPU reset input
5
TUNED
I
Station detector input
6
STEREO
I
Stereo signal input
7
TEST
I
No Use, Tied to low
8
POWDEC
I
Power down detect
9
REMOTE
I
Remote signal input
10
PLL-CE
O
LC72131 chip enable output
11
PLL-CLK
O
LC72131 clock output
12
PLL-DATAI
I
LC72131 data input
13
PLL-DATAO
O
LC72131 data output
14
CLOCK
O
Servo command clock output
15
SUB-Q
I
Servo subq data & status input
16
DATA
O
Servo command data output
17
MUTE_D
O
Digital mute control output
18
CDPORWER
O
CD power supply
19
RDS-DATA
I
BU1922 RDS data input
20
HOLD
O
Servo search Hi output
21
SENSE
I
Servo status SENSE input
22
SQCK
O
Servo subq/sense read clock output
23
XLAT
O
Servo command latch output
24
XRST
O
Servo chip reset output
25
SCOR
I
Servo SUBQ sync input
26
RDS_CLK
I
BU1922 RDS clock input
27
MTRSNS
I
Tape motor reel sense input
28
SLEEP
O
Digital Amp sleep control
29
MOTOR
O
Tape control output for Motor
30
SOL
O
Tape control output for Solenoid
31
SPRELAY
O
Power on/off RELAY control
32
PLYMUTE
O
Tape play back mute signal output
33
REC/PB
O
Tape control output for REC/PB
34
DOLBYNR
O
Tape control output for DOLBY NR
35
BIAS
O
Tape control output for BIAS
36
MDMUTE
O
MD/REC ON mute output
37
VOL-CLK
O
M62442 audio control clock output
38
VOL-DATA
O
M62442 audio control data output
39
VOL-STB
O
M62442 audio control strobe output
40
KEYIO-1
I
AD key input (16 keys)
41
KEYIO-2
I
AD key input (16 keys)
42
BANDAREA
I
Band area option
43
CDTOUCH
I
CD door open/close touch sensor
44
OP/CL SW
I
CD loading open/close sw
open = 2.5V, close = 0V
6-17. IC PIN FUNCTIONS
• IC201 MASTER CONTROL (TC9901) (DYSPLAY Board)
31
Pin No.
Pin Name
I/O
Function
45
FRECSW
I
Tape forward/reverse record sw input
/
1.7V (2k4) = frecsw on & rrecsw on
RRECSW
2.25V (3k9) = frecsw on & rrecsw off
2.89V (6k8) = frecsw off & rrecsw on
5V = frecsw off & rrecsw off
46
PLAYSW
I
Tape play/tape in sw input
/
1.7V (2k4) = play sw on & tape in sw on
TAPEIN
2.25V (3k9) = Play sw on & tape in sw off
2.89V (6k8) = Play sw off & tape in sw on
5V = play sw off & tape in sw off
47
AMS
I
Tape music search input (HI = music)
48
AREF
I
A/D convert refrence input (+5v)
49
AGND
I
A/D convert Input GND input
50
GND
I
GND
51
VDD
I
+5V
52
OPEN
O
CD loading open motor on
53
CLOSE
O
CD loading close motor on
54
POWER
O
System power output
55
MUTE-A
O
Audio mute cuntrol output
56
SEG35
O
57
SEG34
O
58
SEG33
O
59
SEG32
O
60
SEG31
O
61
SEG30
O
62
SEG29
O
63
SEG28
O
64
SEG27
O
65
SEG26
O
66
SEG25
O
67
SEG24
O
68
SEG23
O
LCD segment output
69
SEG22
O
70
SEG21
O
71
SEG20
O
72
SEG19
O
73
SEG18
O
74
SEG17
O
75
SEG16
O
76
SEG15
O
77
SEG14
O
78
SEG13
O
79
SEG12
O
80
SEG11
O
81
SEG10
O
32
82
SEG9
O
83
SEG8
O
84
SEG7
O
85
SEG6
O
86
SEG5
O
LCD segment output
87
SEG4
O
88
SEG3
O
89
SEG2
O
90
SEG1
O
91
SEG0
O
92
COM3
O
LCD common 3 output
93
COM2
O
LCD common 2 output
94
COM1
O
LCD common 1 output
95
COM0
O
LCD common 0 output
96
VLC
O
LCD drive power supply
97
NC
–
No connect
98
NC
–
No connect
99
NC
–
No connect
100
VDD
I
+5V
Pin No.
Pin Name
I/O
Function
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