Block Diagram - Pioneer SX-SW77 Service Manual

5
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

DIN 7
DOUT 6
Serial Data
CLK 8
Interface
STB 9
OSC 5
OSC
LED1 1
LED2 2
LED Driver
LED3 3
LED4 4
5
6
33 SG19/GR10
32 SG18/GR11
31 SG17/GR12
30 VEE
29 SG16/KS16
28 SG15/KS15
27 SG14/KS14
26 SG13/KS13
25 SG12/KS12
24 SG11/KS11
23 SG10/KS10
Control
Display Memory
(24 bits × 12 Words)
Timing Generator
Key Matrix Memory
10 11 13 43
K1 K2 VDD VDD
SX-SW77
6
7
Segment Driver
Grid Driver
Key Scan Output
Grid Driver
Dimming Circuit
12 44 30
VSS VSS VEE
7
8
A
B
C
14
SG1/KS1
15 SG2/KS2
16 SG3/KS3
17
SG4/KS4
18
SG5/KS5
19
SG6/KS6
20
SG7/KS7
D
21 SG8/KS8
22 SG9/KS9
23
SG10/KS10
24
SG11/KS11
25
SG12/KS12
26
SG13/KS13
27 SG14/KS14
28 SG15/KS15
29 SG16/KS16
31
SG17/GR12
32
SG18/GR11
33
SG19/GR10
E
34 SG20/GR9
35 SG21/GR8
36 SG22/GR7
37
SG23/GR6
38
SG24/GR5
42 GR1
41 GR2
40 GR3
39 GR4
F
65
8