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Sanyo GCD 2000 Service Manual page 26

Cd changer stereo music system
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BLOCK
DIAGRAM
PRE-AMP
SECTION
IC251
pPD75306GF-225-3B9
(Micro Processor)
PIN No.
SIGNAL
NAME
PORT NAME
DESCRIPTION
1/0
CONNECT
1
sEG12°
512
Segment
of Liquid
Crystal
Display
LCD
2
SEG13
S13
Segment
of Liquid
Crystal
Display
LCD
3
SEG14
S14
Segment of Liquid Crystal Display
LCD
4
SEG15
515
Segment
of Liquid
Crystal
Display
LCD
5
SEG16
S16
Segment of Liquid Crystal Display
LCD
6
SEG17
S17
Segment of Liquid Crystal Display
LCD
7
SEG18
S18
Segment
of Liquid Crystal Display
LCD
8
SEG19
519
Segment of Liquid Crystal Display
LCD
9
SEG20
S20
Segment of Liquid Crystal Display
LCD
10
SEG21
521
Segment of Liquid Crystal Display
LCD
11
SEG22
522
Segment of Liquid Crystal Display
LCD
12
SEG23
S23
Segment
of Liquid Crystal Display
LCD
13
SEG24
S24/8P0
Segment
of Liquid
Crystal
Display
LCD
14
SEG25
S25/8Pl
Segment
of Liquid
Crystal
Display
LCD
15
SEG26
S26/8P2
Segment
of Liquid
Crystal
Display
LCD
16
SEG27
S2710?3
Segment
of Liquid
Crystal
Display
LCD
17
AUTO
S281BP4
Auto
Tuning
Signal
ACTIVE
: HIGH
LEVEL
o
TUNER
18
NC
S29/BP5
Not
Used (Open)
o
OPEN
,
19
NC
S301BP6
~ Not
Used (Open)
!
o
OPEN
20
NC
S31 /8P7
Not
Used (Open)
o
OPEN
21
COM
O
COMO
'
Common
of Liquid
Crystal Display
LCD
22
COM
1
COM1
Common
of Liquid
Crystal
Display
LCD
23
COM
2
COM2
Common
of Liquid
Crystal
Display
LCD
24
COM
3
COM3
Common
of Liquid
Crystal
Display
LCD
25
BIAS
81AS
Bias of Liquid Crystal Display
26
VLCO
'LCO
Power
Supply
for Drive
of Liquid
Crystal
Display
27
VLC1
'LC1
Power
Supply
for Drive
of Liquid
Crystal
Display
28
VLC2
VLC*
Power
Supply
for Drive
'of Liquid
Crystal
Display
29
STEP
P40
AM
Step
Selection9kHz
(VDO) / 10kHz
(Vs$)
I
TUNER
30
ST
P41
'
~ ST Signal
ACTIVE
: LOW
LEVEL
I
TUNER
31
SD
P42
SD Signal
ACTIVE
: ~OW
LEVEL
I
TUNER
32
NC
P43
Not
Used (Ground)
'
I
vs~
33
Vss
vs~
Ground
34
S CE
P50
Data
Signal
f'rom
LM7001
(For S Series)
o
TUNER
35
S CL
P51
Data
Signal
from
LM7001
(For S Series)
o
TUNER
36
S DO
P52
Data
Signal
from
LM7001
(For S Series)
o
TUNER
37
S MONO
P53
Compulsion
Monaural
(For S Series)
ACTIVE
: HIGH
LEVEL
o
TUNER
38
NC
Poo / INT4
Not Used (Ground)
I
Vss
39
SCK
PO1 /SCK
Clock
Signal
In from
Main
Micro
Processor
(,uPD651
17)
I
MAIN
pCON
40
NC
P021SOISB0
Not
Used (Ground)
vs~
i
-27-
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