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SF-5590SY/5790SY/5990SY
SF-5590SY PLUS/5790SY PLUS/
5990SY PLUS (ZX-455)
R
SEP. 1997
(without price)
SF-5590SY
128KB
DIGITAL
DIARY
SF-5590SY
PC
sync


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CONTENTS
1. SPECIFICATIONS ................................................................................................ 3
2. GENERAL GUIDE ................................................................................................ 5
3. DATA COMMUNICATIONS ...............................................................................12
3-1. DATA TRANSMISSION FROM A UNIT TO ANOTHER UNIT ................... 13
3-2. DATA TRANSMISSION BETWEEN A UNIT AND PERSONAL COMPUTER USING FA-128 ...... 13
4. OPERATION CHECK .........................................................................................15
5. ERROR MESSAGES .......................................................................................... 18
6. SCHEMATIC DIAGRAMS
6-1. MAIN PCB ASS'Y (A342054)-(1/4) ............................................................ 19
6-1. MAIN PCB ASS'Y (A342054)-(2/4) ............................................................ 20
6-1. MAIN PCB ASS'Y (A342054)-(3/4) ............................................................ 21
6-1. MAIN PCB ASS'Y (A342054)-(4/4) ............................................................ 22
6-2. KEYBOARD PCB ASS'Y (A342055)-(1/3) .................................................23
6-2. KEYBOARD PCB ASS'Y (A342055)-(2/3) .................................................24
6-2. KEYBOARD PCB ASS'Y (A342055)-(3/3) .................................................25
7. LSI PIN FUNCTION ............................................................................................26
8. DISASSEMBLY ..................................................................................................27
9. PARTS LIST .......................................................................................................30
10. EXPLODED VIEW ..............................................................................................32


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1. SPECIFICATIONS
Model: SF-5590SY/SF-5790SY/SF-5990SY
* PC LINK software and cable for data transmission (FA-128) are added to SF-5590SY
PLUS/5790SY PLUS/5990SY PLUS. See to 9. PARTS LIST.
Main Modes:
Telephone Directory, Memo, Schedule Keeper, To Do, Expense Manager, Reminder, Calendar, Home
Time, World Time, Calculator, Conversion (metric/currency) and Game (Poker/Blackjack)
Data storage:
Storage and recall of telephone, memo, schedule, to do, expense, reminder data; calendar display;
editing; memory status display
Clock:
World time; reminder alarm; schedule alarm; daily alarm; accuracy under normal temperatures:
±3
seconds per day
Calculation:
12-digit arithmetic calculations; independent memory; percentages; square roots; other mixed calcu-
lations
General:
Display element:
26-column
× 8-line LCD
Memory capacity:
SF-5590SY: 128 KB
SF-5790SY: 256 KB
SF-5990SY: 512 KB
Main component:
LSI
Power supply:
Main:
Two AAA-size alkaline batteries (Type: LR03 (AM4))
Back-up:
One CR2032 lithium battery
Battery life:
Main:
·Approximately 130 hours of continuous display only in Telephone
Directory Mode.
·Approximately 90 hours with 55 minutes of continuous display
only and 5 minutes of processing operation per hour.
·Approximately 80 hours with 55 minutes of continuous display
only and 5 minutes of processing operation per hour, plus 3 min-
utes of backlight operation per hour during continuous display
only period.
Back-up:
Approximately 5 years if main batteries are replaced as soon as
they become weak.
Approximately 2 years if dead main batteries are left in the unit.
Power consumption:
0.25 W


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Current consumption:
Main (Input voltage = 3.0 V):
Telephone top menu (Backlight doesn't shine)-
4.3 mA (TYP.)/5.3 mA (MAX.)
Telephone top menu (Backlight shine)-
27 mA (TYP.)/38 mA (MAX.)
OFF (Using Mask ROM: regular)-
90
µA (TYP.)/130 µA (MAX.)
OFF (Using Flash ROM: irregular)-
120
µA (TYP.)/160 µA (MAX.)
Back-up (Input voltage = 3.0 V): 2.4
µA (TYP.)/10 µA (MAX.)
Auto power off:
Approximately 3 minutes after last key operation
Operating temperature:
0
°C ~ 40 °C (30 °F ~ 104 °F)
Dimensions:
Unfolded:
8.8H
× 163 W × 169D mm (3/8"H × 6 7/16"W × 6 5/8"D)
Folded:
21.5H
× 163W × 91.5D mm (7/8"H × 6 7/16"W × 3 5/8"D)
Weight:
Approximately 250 g (8.8 oz) including batteries


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2. GENERAL GUIDE
s Display
When lighting is dim, you can turn on an EL (electro-luminescent) backlight for easier viewing.
To turn on the EL backlight
There are two ways to turn on the backlight of the display.
Pressing LIGHT causes the backlight to turn on for about 15 seconds, and then turn off automatically.
Pressing SHIFT and then LIGHT also turns on the backlight, but in this case the backlight stays on as
long as you keep performing key operations on the Digital Diary . The backlight turns off automatically
if you do not perform any key operation for about 15 seconds.
Leaving the backlight on for long periods greatly reduces battery life!
You can manually turn the backlight off by pressing LIGHT again.
Failure of the backlight to turn on indicates low battery power. Replace batteries as soon as possible.
Function key
Alpha keyboard
Memory keys
Mode key
10-key pad
Operator keys
Display Change key
Cursor keys
Scroll/Search keys
ESC key
Display
ON/OFF key
Mode keys
Light key