Casio RE-700 Troubleshooting guide

RE-700(ZX-735)
R
(without price)
AUG. 1995
INDEX

OUTLINE ....................................................................................................................... 1
SPECIFICATIONS ......................................................................................................... 1
GENERAL GUIDE ......................................................................................................... 3
BATTERY REPLACEMENT.......................................................................................... 6
RESET OPERATION..................................................................................................... 7
TO SAVE THE DATA TO ANOTHER MACHINE.......................................................... 8
LSI PIN FUNCTION..................................................................................................... 10
DIAGNOSTIC PROGRAM........................................................................................... 12
ERROR MESSAGES................................................................................................... 13
SCHEMATIC DIAGRAM.............................................................................................. 14
EXPLODED VIEW ....................................................................................................... 15
PARTS LIST ............................................................................................................... .16
CONTENTS

— 1 —
OUTLINE
The unit checks spelling for you, and tells you the correct hyphenation of a word using a dictionary of
approximately 115,000 words. You can even use wild card characters to look up words. The unit has also the
digital diary functions such as Telephone Directory, Schedule, Memo, Secret, Timekeeping, Alarm and
Calculator mode.
SPECIFICATIONS
Spell Check/Hyphenation Mode
Automatic spell checking and hyphenation advice based on dictionary of approximately 115,000 words.
Telephone Directory Mode
Storage and recall of telephone directory data (name, telephone number, address, etc.). Each item can contain
up to 380 characters. Includes secret memory area and auto sort function.
Schedule Mode
Storage and recall of appointments for any date in the range of January 1901 through December 2099. Each
item can contain up to 372 characters. Includes secret memory area and auto sort function.
Data Memo Mode
Storage and recall of memos. Each item can contain up to 381 characters. Includes secret memory area and
auto sort function.
Timekeeping Mode
Average of accuracy ±3 seconds per day under normal temperatures; year/month/date, hour/minute/seconds,
AM/PM, day of the week, daylight saving/standard time; full automatic calendar; 12/24 hour timekeeping
format
Alarm Mode
Daily Alarm (20-second electronic buzzer); Schedule Alarm (20-second electronic buzzer); Hourly Time Signal
(beeps every hour on the hour)
Calculator Mode
10-digit arithmetic calculations; constant calculations; memory calculations; 20-digit approximations; percent-
age calculations; square roots; sigh changes; function command signs.
Other functions
Contrast adjustment

— 2 —
General
Display: Liquid crystal display
Memory Capacity: 27,014 bytes
Power Supply: Two lithium batteries (CR2032) ... Main and Back-up
Power Consumption: 0.05 W
Battery Life*: Main battery - approximately 200 hours (continuous display of main menu
screen)
approximately 1 year (1 hour use per day)
Back-up battery - approximately 2 years after the low main battery warning
appears on the display
* The batteries that come installed in this unit when you purchase it are for factory
test purposes, so they will probably not provide normal service life.
Auto Power Off: Approximately 6 minutes after last key operation
Ambient Temperature
Range: 0°C ~ 40°C (32°F ~ 104°F)
Dimensions: Folded: 12.4 (H) ×141 (W) ×82 (D) mm
(1/2" (H) ×5 1/2" (W) ×3 1/4" (D))
Unfolded: 10.6 (H) ×141 (W) ×159.5 (D) mm
(3/8" (H) ×5 1/2" (W) ×6 1/4" (D))
Weight: 105.7 g (3.7 oz) including batteries
Current Consumption:
TYP [µA] Max [µA]
ON (MENU) 205.00 244.25
OFF — 8.25

— 3 —
Display
MENU Key
TIME/ALARM Key
Cursor Keys
FUNCTION Key
ALPHA/NUMBER Key
EXE Key
SHIFT Key
AC/ON Key
C/CLR Key
CODE Key
SPELL/HYPHEN Key
SEARCH Keys
OFF Key
SPACE/Return Key
GENERAL GUIDE
Displaying the Main Menu Screen
Press MENU to display the main menu screen.
Main Menu Screen
Menu Icons
1Telephone Directory Business Mode
2Telephone Directory Personal Mode
3Schedule Mode
4Data Memo Mode
5Calculator Mode
6Secret Memory Area
To change modes
1. Display the main menu screen.
2. The icon of the currently selected mode is highlighted on the display.
Use and to change the selected menu icon.
3. When the icon for the mode you want is selected (highlighted), press EXE.
• Press the TIME/ALARM key to enter the Timekeeping Mode and Alarm Mode. Each press of this key
switches between the two modes.
• Press the SPELL/HYPHEN key to enter the Spell Check Mode and Hyphenation Mode. Each press of
this key switches between the two modes.
123456

— 4 —
Using FUNCTION key
Use this key to access special functions and to perform other functions not marked on the keys. Use the
following sequence to access such functions.
1.Press FUNCTION.
2.Use and to move the highlighting to the function you want.
3.Press EXE to execute the function.
4.If another function menu appears, repeat step 2 and 3.
•To return to the previous display, press FUNCTION.
•To clear a displayed function menu, press AC.
To adjust the display contrast
1.Display the main menu screen.
2.To make the figures on the display darker, press . To make them lighter, press .
To switch the key input tone on and off
1.Press TIME/ALARMto enter the Alarm Mode.
2.Press FUNCTION.
3.Use to select “Sound”, and then press EXE.
4.Use to select “Key Tone”, and then use and to switch it on and off.
5.Press EXE to complete the setting operation.
About the “Check time!” display
When the message “Check time!” appears on the display, pressing any key displays the current time setting.
Check to make sure that the setting is correct before performing any other operation.
Low Battery Warning
A low battery warning protects against loss and corruption of data stored in memory due to weak battery power.
Replace the main battery immediately if the following display appears.
Main Battery
Getting Weak!
Replace it!
•Whenever the above display appears, only the OFF key is operational. Power switches off automatically
approximately 30 seconds after the low battery warning message appears.
Memory Capacity Screen
To display the memory capacity
1.While the main menu is displayed, or any time you are in the Telephone Directory, Schedule, Data Memo
or Spell Check/Hyphenation Mode, press FUNCTION.
2.Use and to select “Memory Capacity” and then press EXE.
Memory Capacity
Free 25526
Used 1488 %
Remaining memory
(Unit: bytes)
Memory used
Memory used
(Unit: bytes)
5

— 5 —
•The memory values shown on the previous page are the total for both the open memory area and the
secret memory area.
•Press AC to clear the memory capacity screen.
To display the number of items in each mode
1.While the main menu is displayed, press FUNCTION.
2.Use and to select "Number of Items" and press EXE.
Open Memory Area
Secret Memory Area
•If you perform the above procedure while in the open memory area, the number of items stored in the
open memory area only are displayed. To see the number of items in the secret memory area, you must
perform the above operation while accessing the secret memory area.
Tel (Busi): 27
Tel (Pers): 50
Schedule : 1
Tel (Busi) : 3
Tel (Pers): 4
Schedule : 2
How memory capacity is calculated
You can store up to 27,014 bytes of data in memory. There is no limit on the amount of memory you can use
in each mode, but the total amount of data stored is 27,014 bytes. The following shows how many bytes the
data in each mode takes up. One character (each newline operation counts as a character also) takes up one
byte.
Mode Bytes per Data Item
Telephone Directory (name) + (telephone number) + (address, etc.) + 4
Schedule (description) + 12
Data Memo (memo name) + (memo contents) + 3
Examples:
Telephone Directory
When all items use 8 characters for the name, 10 characters for the phone number, and 20 characters
for the address, you can store approximately 640 items.
Schedule
When all items use 20 characters, you can store approximately 840 items.
Data Memo
When all items use 10 characters for the memo name and 10 characters for the memo content, you can
store approximately 1,170 items.

— 6 —
BATTERY REPLACEMENT
Note that the main battery and the back-up battery should be replaced separately. If you remove both batteries
from the unit at the same time, all data stored in memory will be erased. Whenever you remove both batteries
from the unit, be sure to re-install the main battery first.
Important!
• Makesurethat the positive (+) side of thebatteriesisalways facing up (so you can seeit)whenyou install
batteries into the unit.
• Replace the back-up battery at least once every two years.
To replace the main battery
1. Loosen the screw that holds the battery compartment cover of the unit in place and remove the battery
compartment cover.
2. Loosen the screw that secures the main battery holder in place and remove the battery holder.
3. Insert a thin, pointed non-metallic object into (A) and remove the old battery.
4. Wipe off the surfaces of a new battery with a dry, soft cloth and insert it into the unit making sure that its
positive (+) side is facing up (so you can see it).
5. Replace the battery holder and secure it in place with its screw.
6. Replace the battery compartment cover and secure it in place with its screw.
To replace the back-up battery
1. Loosen the screw that holds the battery compartment cover of the unit in place and remove the battery
compartment cover.
2. Remove the back-up battery sticker.
3. Loosen the screw that secures the back-up battery holder in place and remove the battery holder.
4. Insert a thin, pointed non-metallic object into (B) and remove the old battery.
5. Wipe off the surfaces of a new battery with a dry, soft cloth and insert it into the unit making sure that its
positive (+) side is facing up (so you can see it).
6. Replace the back-up battery holder and secure it in place with its screw.
7. Do not forget to replace the sticker.
8. Replace the battery compartment cover and secure it in place with its screw.
RESET
Main battery Back-up battery
(A)
(B)

— 7 —
RESET OPERATION
Two kinds of reset operation can be performed. The all-reset operation deletes all data in memory. The secret
reset operation deletes only your password and the data in the secret memory area.
Important!
Be sure to perform the all-reset operation after purchasing the RE-700.
To perform all-reset
1. Switch power off.
2. Press the RESET button with a thin, pointed object.
3. Use to select “Reset”, and press EXE.
4. Use to select “Yes”, and press EXE.
5. The main menu screen appears and all data is deleted.
To perform secret reset
1. Switch power off.
2. Press the reset button with a thin, pointed object.
3. Use to select “Del Secret Data”, and press EXE.
4. Use to select “Yes”, and press EXE.
5. The message “Check time!” appears and all data in the secret memory area and the password are deleted.
• If you want to cancel the reset operation status immediately after you press the RESET button, select
“Exit”, and press EXE.
The following are the initial settings produced by the all-reset operation.
Built-in Clock: 12:00 AM (midnight), January 1, 1996
12/24-Hour Format: 12-hour
Alarm: OFF
Alarm Time: 12:00 AM
Alarm Time Signal: OFF
Key Input Tone: ON
Date Format: Month/Day/Year
RESET button
RESET

— 8 —
DP1
CP52
CP51
Batteries
CP50
CP51
CP52
CP50
DP1
3
2
1
TX
GND
RX
1K51K
MA713
DTC114YKT
MA713
UNIT-1
CP51
CP52
CP50
DP1
3
2
1
TX
GND
RX
1K51K
MA713
DTC114YKT
MA713
UNIT-2
SB-61 / SB-62
TO SAVE THE DATA TO ANOTHER MACHINE
It is commonly necessary to save all data stored in the customer's unit before repairing it. For this purpose,
you can transfer the data of the RE-700 unit to another unit using the following procedure.
(1)To reset the receiving unit
Please reset the unit used to receive the data from the customer's unit.
(2)To connect transmission unit with receiving unit
Please remove the covers of battery compartments from both the transmission unit and the receiving unit,
and connect one with another as shown in the figures below;