Pioneer SX-SW404 Service Manual page 81

5
QQ
3 7 63 1515 0
PT6315 (FL ASSY : IC5901)
• FL Driver IC
Pin Arrangement
LED1 1
LED2 2
LED3 3
LED4 4
OSC 5
DOUT 6
DIN 7
CLK 8
STB 9
K1 10
K2 11
Block Diagram
TE
L 13942296513
DIN
DOUT
CLK
STB
OSC
LED1
LED2
LED3
LED4
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5
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33
32
31
30
29
28
27
26
25
24
23
Control
7
6
Serial Data
8
Interface
Display Memory
(24 bits × 12 Words)
9
5
OSC
Timing Generator
Key Matrix Memory
1
2
LED Driver
3
4
x ao
y
10
K1
i
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6
8
SG19/GR10
SG18/GR11
SG17/GR12
VEE
SG16/KS16
SG15/KS15
SG14/KS14
SG13/KS13
SG12/KS12
SG11/KS11
SG10/KS10
Q Q
3 6 7 1 3
Dimming Circuit
u163
11 13 43 12 44
K2 VDD VDD VSS VSS
.
SX-SW404
6
7
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
14
15
16
17
18
19
20
21
22
23
Segment Driver
24
25
Grid Driver
26
Key Scan Output
27
28
29
31
32
33
34
35
36
37
38
42
41
m
Grid Driver
40
39
co
30
VEE
7
8
9 9
A
B
C
2 8 9 9
SG1/KS1
SG2/KS2
SG3/KS3
SG4/KS4
SG5/KS5
SG6/KS6
SG7/KS7
D
SG8/KS8
SG9/KS9
SG10/KS10
SG11/KS11
SG12/KS12
SG13/KS13
SG14/KS14
SG15/KS15
SG16/KS16
SG17/GR12
SG18/GR11
SG19/GR10
E
SG20/GR9
SG21/GR8
SG22/GR7
SG23/GR6
SG24/GR5
GR1
GR2
GR3
GR4
F
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