JVC TH-A75R Service Manual page 48

TH-A75R
4.26 74LCX32MTC-X (IC522) : Quad 2 input OR gate
• Pin layout & Block diagram
1A
1B
1Y
2A
2B
2Y
GND
4.27 MN101C35DKW (IC401) : FL driver microcomputer
• Pin layout
• Pin function
Pin No. Symbol
1 NC
2 DATAIN
3 CLOCK
4 NC
5 INITIAL
6,7 NC
8 B5V
9 OSC2
10 OSC1
11,12 GND
13 NC
14~23 GND
24 VREF+
25 NC
26 RESET
27 PROG_LED
28 NC
29 ILUMI_LED
30~32 NC
33~38 GND
39 PROG_DM
40 ILUMI_DIM
41~46 NC
47 G1
48~59 G2~G13
60 G14
61~64 NC
65~99 S1~S35
100 -VPP
1-48 (No.21189)
1 14 V
CC
2 13 4B
3 12 4A
4 11 4Y
5 10 3B
6 9 3A
7 8 3Y
(TOP VIEW)
100 76
1 75
25 51
26 50
I/O
- Not connect
I FL driver communication data input
I FL driver communication clock input
- Not connect
I FL driver communication CS(INITIAL)
- Not connect
- VDD(B5V)
O 8MHz main clock output
I 8MHz main clock input
- Ground
- Not connect
- Ground
- Reference voltage
- Not connect
I FL reset input
O PROGRAM LED switching signal
O Not connect
O Illumi LED switching signal
- Not connect
- Ground
O Program LED dimmer select
O Illumi LED dimmer select
- Not connect
O Grid signal outputs
O Grid signal outputs
O Grid signal outputs
- Not connect
O Segment signal outputs
- VPP
• Truth table
INPUTS
A B
L L
L H
H L
H H
Function
OUTPUT
Y
L
H
H
H