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R
SF-5500B(LX-547E/F)
FEB. 1995
(with price)
SF-5500B


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CONTENTS
1. SCHEMATIC DIAGRAM
1-1. MAIN PCB .................................................................................................................. 1
1-2. KEY MATRIX 1 .......................................................................................................... 2
1-3. KEY MATRIX 2 .......................................................................................................... 3
2. SPECIFICATIONS ............................................................................................................ 5
3. REPLACING THE BATTERIES ........................................................................................ 6
4. RESETTING THE UNIT .................................................................................................... 7
5. SAVING DATA .................................................................................................................. 8
6. LSI PIN FUNCTIONS
6-1. CPU:LSI1 .................................................................................................................12
6-2. VOLTAGE REGULATOR:REG1 (S-81253) ............................................................ 13
6-3. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ........................................................13
7. TROUBLESHOOTING ....................................................................................................14
8. DIAGNOSTICS ................................................................................................................ 17
9. ASSEMBLY VIEW ..........................................................................................................23
10. PARTS LIST ....................................................................................................................25


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-- 1 --
1.
SCHEMATIC DIAGRAM
1-1. MAIN PCB
Note: There are two kind of PCBs.
Refer to the following matrix.
TYPE
LSI3
C14
R3
R4
R11
A
OOO
--
O
B
------
O
--
O: Mounted
--: Not mounted.


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-- 2 --
1-2. KEY MATRIX 1


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-- 3 --
1-3. KEY MATRIX 2
M+
MR
%
'
MC
÷
9
C
AC
x
6
8
7
­
3
5
4
0
+
=
2
1
.
CODE:22
CODE:17
CODE:16
CODE:23
CODE:21
CODE:18
CODE:13
CODE:12
CODE:19
CODE:20
CODE:14
CODE:09
CODE:08
CODE:15
CODE:10
CODE:05
CODE:04
CODE:11
CODE:06
CODE:00
CODE:07
CODE:01
CODE:03
CODE:02
KY1
KY2
KY3
KY4
KY5
KY6
KY7
KY8
KY1
KY2
KY3
KY4
KY5
KY6
KY7
KY8
1
2
3
4
5
6
7
8
9
10
11
12
FG
FG
KY1
KY2
KY3
KY4
KY5
KY6
KY7
KY8
FG
FG
HS3
FG
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