R
SF-5300B(LX-547)
SEP. 1994
SF-5300B
(with price)
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. RAM:LSI2 AND LSI3 (CXK58257) .......................................................................... 13
6-3. VOLTAGE REGULATOR:REG1 (S-81253) ............................................................ 14
6-4. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ........................................................ 14
7. TROUBLESHOOTING .................................................................................................... 15
8. DIAGNOSTICS ................................................................................................................ 18
9. ASSEMBLY VIEW .......................................................................................................... 23
10. PARTS LIST .................................................................................................................... 25
-- 1 --
1.
SCHEMATIC DIAGRAM
1-1. MAIN PCB
-- 2 --
1-2. KEY MATRIX 1
-- 3 --
1-3. KEY MATRIX 2
M
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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