Philips MC-M350 SERIES, Руководство по обслуживанию

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5-1
KEY BOARD
TABLE OF CONTENTS
IC Block Diagram ........................................................................ 8-1
Circuit Diagram ........................................................................... 8-2
Layout Diagram-Component ...................................................... 8-3
Layout Diagram-SMD ................................................................. 8-3
Electrical parts list ...................................................................... 8-4
5-1
Block Diagram
Pin Assignment
HT1622
2 January 10, 2001
S E G 1 2
N C
S E G 8
S E G 9
S E G 1 0
S E G 1 1
N C
S E G 1 9
S E G 1 8
S E G 1 7
S E G 1 6
S E G 1 5
S E G 1 4
S E G 1 3
N C
N C
N C
N C
S E G 7
56 57 58 59 60 61 62 63 64 52 53 54 55
23 20 21 22 24 25 26 27 28 29 30 31 32
4 1
5 1
3 7
3 8
3 9
4 0
4 9
4 8
4 7
4 6
4 5
4 4
4 3
4 2
5 0
3 3
3 4
3 5
3 6
0 6 $
$ " 3 . 2
S
E
G
23
S
E
G
24
S
E
G
25
S
E
G
26
S
E
G
27
S
E
G
28
S
E
G
29
S
E
G
30
S
E
G
31
N
C
S
E
G
20
S
E
G
21
S
E
G
22
C S
B Z
N C
R D
W R
D A T A
V S S
O S C I
V D D
V L C D
I R Q
N C
B Z
T 1
T 2
C O M 1
N C
T 3
C O M 0
C
O
M
5
C
O
M
2
C
O
M
3
C
O
M
4
C
O
M
6
C
O
M
7
S
E
G
0
S
E
G
1
S
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G
2
S
E
G
3
S
E
G
4
S
E
G
5
S
E
G
6
1
1 1
2
3
4
5
6
7
8
9
1 0
1 2
1 3
1 4
1 5
1 8
1 9
1 6
1 7
W a t c h d o g T i m e r
a n d
T i m e B a s e G e n e r a t o r
D i s p l a y R A M
L C D D r i v e r /
B i a s C i r c u i t
C o n t r o l
a n d
T i m i n g
C i r c u i t
D A T A
W R
O S C I
C S
R D
C O M 0
C O M 7
S E G 0
S E G 3 1
T o n e F r e q u e n c y
G e n e r a t o r
B Z
B Z
I R Q
V S S
V D D
V L C D