R
(with price)
SF-4300R(LX-546)
OCT. 1994
SF-4300R
CONTENTS
1.
SCHEMATIC DIAGRAM .................................................................................................... 1
1-1. MAIN PCB .................................................................................................................. 1
1-2. KEY MATRIX ............................................................................................................. 2
2.
SPECIFICATIONS ............................................................................................................. 3
3.
TO REPLACE THE BATTERIES....................................................................................... 5
4.
DATA TRANSFER ............................................................................................................. 6
5.
OPERATION REFERENCE ............................................................................................. 10
5-1. RESET OPERATION ............................................................................................... 10
5-2. TO ADJUST THE DISPLAY CONTRAST ............................................................... 11
5-3. TO CHECK THE MEMORY STATUS ...................................................................... 11
5-4. THE SOUND MENU ................................................................................................. 11
6.
LSI, IC (Pin function) ...................................................................................................... 12
6-1. CPU .......................................................................................................................... 12
6-2. RAM:MB84256A-70/10LL (LSI3), ROM:
µPD23C1001EAGW-K81 (LSI4) ............. 13
6-3. VOLTAGE REGULATOR:S-81253SGUP (REG1) .................................................. 14
6-4. VOLTAGE DETECTOR:S-80752AN (DET1) ........................................................... 14
7.
TROUBLESHOOTING ..................................................................................................... 15
8.
HARD CHECK ................................................................................................................. 18
9.
ASSEMBLY VIEW ........................................................................................................... 23
10. PARTS LIST .................................................................................................................... 25
-- 1 --
1.
SCHEMATIC DIAGRAM
1-1. MAIN PCB
-- 2 --
1-2. KEY MATRIX
-- 3 --
2. SPECIFICATIONS
Main Modes:
Telephone Directory, Memo, Schedule Keeper, Reminder, Calendar, Home Time, World Time and
Calculator.
Data storage:
Storage and recall of telephone, memo, schedule, reminder data; calendar display; secret area; editing;
memory status display.
Clock:
World time; reminder alarm; schedule alarm; daily alarm; accuracy under normal temperatures:
±3
seconds average.
Calculation:
10-digit arithmetic calculations; arithmetic constants (+, ,
×, ÷); independent memory; percentages;
square roots; 20-digit approximations; date calculations; other mixed calculations.
General:
Display element:
16-column
× 4-line LCD
Memory capacity:
32 KB (28579 bytes)
Main component:
LSI (The LX-546AQ is with an outside ROM, LSI4.)
Power supply:
2 lithium batteries (CR2032)
Power consumption:
0.05W
Battery life:
Approximately 400 hours continuous operation in Telephone Directory
Approximately 350 hours repeating one minute of input and 10 minutes of display in Telephone
Directory
Approximately 12 months for memory back up
Auto power off:
Approximately 6 minutes after last key operation
Operating temperature: 0
°C ~ 40°C (32°F ~ 104°F)
Dimensions:
Unfolded:
9.6H
× 122W × 158.5Dmm (3/
8"H × 4
3/
4"W × 6
1/
4"D)
Folded:
12.4H
× 122W × 81.5Dmm (1/
2"H × 4
3/
4"W × 3
1/
4"D)
Weight:
89g (3.1 oz)
Current consumption:
Storage Capacity:
The 32K bytes memory capacity includes a 28579 bytes user area. The following shows examples
of what this means for the storage of data in each mode.
Telephone Directory:
Approximately 1360, under the following conditions:
8-character name
10-character telephone number
Approximately 680, under the following conditions:
8-character name
10-character telephone number
20-character address
Memo:
Approximately 1290, 20-character memos
Power switch
TYP. [
µA]
MAX [
µA]
OFF
--
20
ON
--
550