Casio SF-4900L, SF-4700L Service manual
SF-4700L (ZX-454 A,B)
SF-4900L (ZX-454 E,F)
JUL. 1997
(without price)
SF-4700L
R
CONTENTS
1. SPECIFICATIONS ............................................................................................................3
2. GENERAL GUIDE.............................................................................................................5
3. BATTERY REPLACEMENT .............................................................................................8
4. RESET OPERATION ........................................................................................................9
5. TO SAVE THE DATA......................................................................................................10
6. PIN FUNCTION ...............................................................................................................12
7. DIAGNOSTIC PROGRAM ..............................................................................................13
8. ERROR MESSAGE.........................................................................................................17
9. SCHEMATIC DIAGRAMS...............................................................................................19
10. EXPLODED VIEW...........................................................................................................21
11. PARTS LIST ....................................................................................................................22
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1. SPECIFICATIONS
Memory Capacity
Memory capacity differs according to model. The following shows the memory capacity for each available
model.
Model Memory
SF-4700L 64K bytes
SF-4900L 128K bytes
The following shows the number or items that can be stored in each model (SF-4700L/4900L).
Telephone Directory
Approximately 2900 (SF-4700L)/6000 (SF-4900L), under the following conditions:
8-character name
10-character telephone number
Approximately 1400 (SF-4700L)/3000 (SF-4900L), under the following conditions:
8-character name
10-character telephone number
20-character address
Memo
Approximately 2700 (SF-4700L)/5700 (SF-4900L), 20-character memos.
Schedule Keeper
Approximately 1800 (SF-4700L)/3800 (SF-4900L), under the following conditions:
1 item per day, 20 characters per item
30 days per month
Starting time specified,alarm time set
Approximately 2100 (SF-4700L)/4500 (SF-4900L), under the following conditions:
1 item per day, 20 characters per item
30 days per month
Starting time specified, no alarm time
Reminder
Approximately 3600 (SF-4700L)/7400 (SF-4900L), under the following conditions:
10 characters per item
Alarm time set
Approximately 4000 (SF-4700L)/8400 (SF-4900L), under the following conditions:
10 characters per item
No alarm time
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:
Worldtime; reminder alarm; schedule alarm; daily alarm; accuracy under normal temperatures: average ±3
seconds per day
Calculation:
10-digit arithmetic calculations; arithmetic constants (+, –, ×, ÷); independent memory; percentages; square
roots; 20-digit approximations; date calculations; other mixed calculations
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General:
Display element: 16-column × 4-line LCD
Main component: LSI
Power supply: Three lithium batteries (CR2032)
Current consumption:
Telephone top menu (Backlight from EL doesn't shine)600 µA (MAX.)
Telephone top menu (Backlight from EL shines)-
12.6 mA (MAX.)
OFF- 19 µA (MAX.)
Low battery message: 7.2 V ± 2.5%
Forced power off: 6.7 V ± 2.5%
Battery life: • Approximately 300 hours of continuous display only in Telephone Mode.
• Approximately 170 hours with 55 minutes of continuous display only and
5 minutes of processing operation per hour.
• Approximately 110 hours with 55 minutes of continuous display only and
5 minutes of processing operation per hour, plus 3 minutes of backlight
operation per hour during continuous display only period.
Power consumption: 0.2 W
Auto power off: Approximately 6 minutes after last key operation
Operating temperature: 0 °C ~ 40 °C (32 °F ~ 104 °F)
Dimensions:
Unfolded: 11 H × 152.5 W × 181.5 D mm (3/8" H × 6" W × 71/8" D)
Folded: 15 H × 152.5 W × 93 D mm (5/8" H × 6" W × 35/8" D)
Weight: 138 g (4.9 oz) including batteries
— 4 —
2. GENERAL GUIDE
The following illustration shows the names of the main controls of the SF-4700L/4900L.
Display
Mode Keys
Power OFF
Key
Power ON/
Clear key
Connector
Terminal
Light key
Lock
Numeric
Keys
Cursor Keys
Keyboard
Setting Up the SF Unit
After batteries are loaded, use the following procedures to set up the SF Unit for operation.
To switch power on and off
1. Press ON to switch power on.
• The initial screen for the mode that was seleted when you last switched power off appears on the
display.
• lf either of the messages (A or B) shown bellow appears on the display, follow the procedures
described bellow.
Whenever you turn on the power of the SF Unit ,it performs a self-check before beginning operation.
If a problem is discovered during the self-check, the SF Unit displays one of the following messages.
Note
• The above messages always appear in English, regardless of the system language setting.
If this is the first time you ever turned on the SF Unit...
Perform the RESET OPERATION on page 9.
If this is not the first time you are using the SF Unit...
There is probably a problem with the data in memory (data error). Note that once data is lost it cannot
be recovered. Such data errors are generally caused by one of the following problems.
• Interruption of battery power.
• Severe electrostatic charge, impact, change in temperature, or change in humidity.
• Hardware problem.
— 5 —
After a data error is discovered, you will not be able to input or edit data. In order to return memory to
normal (allowing further input and editing of data), you must perform the RESET operation to clear the
memory of all data. Before doing so, you may want to recall important data and write it down (if you don't
already have a copy). You can then re-input the data after clearing the memory.
The RESET procedure you should use depends on the type of message error message on the display.
"ARE YOU USING A NEW UNIT FOR THE FIRST TIME ?"
1. Make sure that NO is highlighted and then press set. If YES is highlighted, press to move the
highlighting to NO and then press SET.
• The message "DATA ERROR ! CHECK YOUR USER'S GUIDE FOR PROCEDURE !" appears on the
display at this time.After this message appears, you can press CLEAR to clear it from the display and
recall data in order to make a back-up record of it before continuing.
2. Press the RESET button, which is located inside the battery compartment cover on the back of the unit.
• This causes the "CLEAR MEMORY AND SET UP THE UNIT FOR OPERATION ?" message to
appear on the display.
3. Press to move the highlighting to YES and then press SET to reset the uint.
• Highlighting NO and pressing SET clears the reset message and displays the Home Time screen.
"CLEAR MEMORY AND SET UP THE UNIT FOR OPERATION ?"
1. Make sure that YES is highlighted. If OFF is highlighted, press to move the highlighting to YES.
• Highlighting OFF and pressing SET turns off the unit without resetting the unit.
2. Press SET to reset the unit.
If you still have trouble after trying the RESET operation, you may have a hardware problem.
• lf a low battery power message appears on the display or if the display remains blank when you
turn power on, replace batteries as soon as possible.
2. press OFF to switch power off.
About Auto Power Off function...
The SF Unit is equipped with an Auto Power Off function that switches power off automatically whenever you do not perform any key operation for about six minutes. To restore power, press ON.
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 SF Unit .
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.
— 6 —
To adjust the display contrast
1. Enter the Telephone Directory Mode.
• You could enter any mode except the Calculator mode here.
2. Press SHIFT CONT.
3. Use the and keys to adjust the contrast.
4. After you are finished, press ESC to clear the contrast abjustment display.
To select a mode
Press one of the mode keys to select the mode you want.
TEL Telephone Directory mode for storage of telephone numbers, name, addresses,
and six user-definable entries.
MEMO Memo mode for storage of unformatted data in a kind of electronic notebook.
SCHEDULE Schedule Keeper mode for storage of appointments scheduled for specific
dates and times, and setting of Schedule Alarms to remind you of your
appointments.
CALENDAR Displays any monthly calendar from January 1901 through December 2099.
HOME/WORLD Home Time/World Time modes for display of the current time in your hometown
and other locations around the globe. For example, you can set New York as
your home time and London as the world time.
REMINDER Reminder mode to create reminders and alarms for annual, monthly, and daily
events.
CAL Calculator mode for basic calcuations with the touch of a key.
To check the memory status
Press SHIFT and then hold down CAPA to display a screen that shows the current memory status. To
clear the memory status display, release CAPA.
You can enter any mode except the calculator Mode and Home/World Time Mode here
Remaining memory
capacity
Total number of
characters stored in
memory
Note
The screen example shown here is the SF-4900L. The capacity values(FREE and USED total) is different on the SF-4700L display.
— 7 —
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