Casio NX-4000 Troubleshooting guide

NX-4000/6000
R
(without price)
SEP. 1995
INDEX

FEATURES.................................................................................................................... 1
SPECIFICATIONS ......................................................................................................... 2
BATTERY REPLACEMENT.......................................................................................... 4
REPLACING THE BACK-UP BATTERY ...................................................................... 4
RESET OPERATION..................................................................................................... 5
TO SAVE THE DATA TO ANOTHER UNIT.................................................................. 6
BLOCK DIAGRAM ........................................................................................................ 8
TOUCH PANEL CIRCUIT.............................................................................................. 9
PIN FUNCTION............................................................................................................ 10
DIAGNOSTIC PROGRAM........................................................................................... 11
MESSAGE TABLE ...................................................................................................... 15
SCHEMATIC DIAGRAMS ........................................................................................... 17
PARTS LIST ................................................................................................................ 21
EXPLODED VIEW ....................................................................................................... 24
CONTENTS

— 1 —
FEATURES
• Pen-based graphic user interface
Simply tap on display icons and buttons to perform any operation.
• Color display
The display shows data in three colors: orange, blue, and green. Different colors can be used to highlight
specific dates in the Calendar.
• Desktop Menu System
Functions are represented by realistic icons that are arranged on a desk in your virtual office. Simple tap on
the icon that represents a function to access it.
• 256 kbytes (NX-6000) / 128 kbytes (NX-4000) of memory
You get enough memory to store up to 11,100 (NX-6000) / 5,200 (NX-4000) Telephone Directory items.
• Powerful data bank functions
Telephone Directory, Business Card Directory, Memo, Sketch, To Do, Expense Manager, Reminder, and
Schedule Keeper are at your fingertips throughout the day.
• Secret Drawer
A convenient place to lock up confidential information using a secret password.
• Calendar - Schedule Keeper - Reminder - To Do linking
Reminder and To Do items are automatically displayed in the applicable Schedule Keeper dates. Markers
appear on the Calender display to indicate dates for which Schedule Keeper, Reminder, and To Do items are
scheduled.
• Timepiece with Home Time and World Time
Dual timekeeping lets you keep track of the current time in two different locations.
• Powerful alarm functions
In addition to the standard daily alarm, you can also set alarms for Schedule Keeper, Reminder, and To Do
items.
• Calculator
A 12-digit arithmetic calculator is just the thing for those quick, on-the-go calculations.
• Data Communication
Exchange data with another NX Unit or with a CASIO SF Unit/CSF Unit.

— 2 —
SPECIFICATIONS
Storage Capacity
The 256K (NX-6000) / 128K (NX-4000) bytes memory capacity includes a 245,709 / 114,637-byte user area.
The following shows examples of what this means for the storage of data in each mode.
Telephone Directory
Approximately 11,100 / 5,200, under the following conditions:
8-character name
10-character telephone number
Approximately 5,700 / 2,600, under the following conditions:
8-character name
10-character telephone number
20-character address
Business Card Directory
Approximately 2,900 / 1,300, under the following conditions:
10-character employer name
8-character personal name
10-character telephone number
10-character position
10-character department
20-character address
Memo
Approximately 10,600 / 4,900, 20-character memos.
Sketch
Approximately 160 / 80
• The number of sketch pages that can be stored varies greatly according to the amount of data included
on each sketch page.
To Do
Approximately 6,100 / 2,800, under the following conditions:
20-character description
Illustration used
Deadline set
Schedule Keeper
Approximately 6,300 / 2,900, under the following conditions:
20-character description
Illustration used
Starting time specified, alarm time set
No sketch page data
Approximately 3,100 / 1,400, under the following conditions:
20-character description
Illustration not used
Starting time specified, no alarm time
One sketch page for every 30 text data items.

— 3 —
Reminder
Approximately 12,200 / 5,700, under the following conditions:
10-character description
Illustration used
Alarm time set
Approximately 14,400 / 6,700, under the following conditions:
10-character description
Illustration not used
No alarm time
Expense Manager
Approximately 7,400 / 3,400, under the following conditions:
10-character description
Expense type and Payment type set
General:
Display element: 21-column ×8-line LCD
Memory capacity: 256 KB (NX-6000), 128 KB (NX-4000)
Main component: LSI
Power supply:
Main: Two AAA-size batteries (Type: R03 (UM-4) or LR03 (AM4))
Back-up: One CR2032 lithium battery
Battery life:
Main: Approximately 110 hours continuous display in Telephone Directory (approximately
200 hours on type LR03 (AM4)); approximately 85 hours repeating one minute of
input and 10 minutes of display in Telephone Directory (approximately 150 hours on
type LR03 (AM4))
Back-up: 5years if main batteries are replaced as soon as they becomes weak. 2 year if dead
main batteries are left in the unit.
Power consumption: 0.1 W
Auto power off: Approximately 6 minutes after last key operation
Operating temperature:0°C ~ 40°C (32°F ~ 104°F)
Dimensions:
Unfolded: 14.7 H ×81.9 W ×225 D mm (9/16" H ×3 1/4" W ×8 7/8" D)
Folded: 15.4 H ×81.9 W ×124 D mm (5/8" H ×3 1/4W ×4 7/8" D)
Weight: 148 g (5.2 oz) including batteries
Current consumption:
Main Battery
ON (MENU): MAX = 3.7 mA, TYP = 3.2 mA
OFF: MAX = 35 µA, TYP = 24 µA
Backup Battery
Back-up: MAX = 10 µA, TYP = 6.3 µA
Voltage detection:
Main battery: 2.5 V ±2.5 % or below
Forced OFF: 2.3 V ±2.5 % or below
Backup battery: 2.6 V ±2.5 % or below

— 4 —
BATTERY REPLACEMENT
1. Switch power off.
2. Slide the battery compartment cover in the direction indicated by the arrow.
3. Slide the battery switch in the direction indicated by the arrow in the illustration.
4. Remove the main battery holder.
5. Remove both old batteries and replace them with two new ones.
• Make sure that the positive (+) and negative (–) ends of the
batteries are facing correctly.
6. Replace the main battery holder, and slide the battery switch in the direction
indicated by the arrow in the illustration.
7. Replace the battery compartment cover.
8. Turn on power.
• The Home Time screen always appears whenever you turn power on for the first time after replacing
main batteries.
9. Check the Home Time setting and make changes if necessary.
REPLACING THE BACK-UP BATTERY
Before replacing the back-up battery, note the following precautions:
• Do not remove the back-up battery from the NX Unit while the main batteries are removed.
• Be sure to replace the back-up battery at least once 2 years. Otherwise, you run the risk of losing data
stored in memory.
1. Switch power OFF.
2. Slide the battery compartment cover in the direction indicated by the arrow.
3. Remove the screws that hold the back-up battery holder in place, and remove
the holder.

— 5 —
4. Remove the old battery and replace it with new one, making sure that the positive (+) side of the new battery
is facing up (so you can see it).
5. Replace the back-up battery holder and secure it by tightening its screw.
• Be careful that you do not over tighten the screw.
6. Replace the battery compartment cover.
RESET OPERATION
Youcan use either SECRET RESETorALLRESET to initialize the NX Unit.ALLRESETdeletes all data stored
in memory, while SECRET RESET deletes only the data stored in the secret drawer.
To perform ALL RESET
1. Switch power ON.
2. Open the battery compartment cover.
3. Press the RESET button with a thin, pointed object.
• At this time, the touch panel screen appears.
4. Tap the tip of the pencil icon as each one appears.
• When you tap the fourth pencil icon, the RESET screen appears.
Warning!
The next step deletes all data stored in the NX Unit's memory. Make sure that you really want to delete the
data before you continue!
5. Tap ALL RESET.
Note
• The message “ALL RESET? OK/ESC” always appears in English, regardless of the system language
setting.
6. Tap OK to reset the memory and delete all data or ESC to abort the reset operation without deleting
anything.
• After you tap OK, the system language screen appears.
7. Select the system language by tapping on the language you want to use, and then tap OK.
• After you select the system language, the Home Time screen appears.
8. Check the Home Time setting and make any changes that you want.
RESET button

— 6 —
Following the all reset operation, the NX Unit settings are initialized as noted below.
Home Time: Washington, D.C.
JAN/1/1996 MON
12:00 AM
12-hour format
World Time: New York
Daily Alarm: 12:00 PM
Sound: Schedule alarm, Reminder alarm and To Do alarm — ON
Daily alarm — OFF
Key input tone — ON
Input mode: Overwrite
TO SAVE THE DATA TO ANOTHER UNIT
NX-4000/6000 can transfer customer's data to another NX-4000/6000 with memory protection only when
replacing the LCD or the outer case.
How to transfer the data
1) Make sure that the power of both units is switched off.
2) Remove the covers from the data communications jacks on the two NX units.
3) Connect the two units using the SB-62 cable as shown in the figure below.
4) Turn the power switch of slave units on.
5) Reset the slave unit.
6) The slave unit must be set the date of Feb. 3rd, 1901 into the memory under the calculator mode.
Operation : ON AC 1 DATE 2 DATE 3 DATE M+
If you don't set the date, the "PASSWORD" isn't transferred to the slave unit.
7) Check the hardware parameters, and if the both units have another condition, reset as follows;
Operation : MENU FUNC DATA COM. SET UP PAR. NONE 7 9600 OK
SB-62 cable
PARITY EVEN ODD NONE
BIT LENGT 78
BPS 4800 / 9600
//////////// SET UP PAR. ////////////

— 7 —
RECEIVE OK!
TO STOP
PRESS [ ESC ]
DATA
RECEIVE OK!
TO STOP
PRESS [ ESC ]
DATA
8) Set up the slave unit.
Operation : MENU FUNC DATA COM. RECEIVE
OK ESC
OK ESC
If you can not succeed to transfer the data, press ESC key on both unit and try to transfer the data again
according to the above procedure.
9) Set up the customer's unit.
• Turn the power switch off.
• Press the RESET button with a thin, pointed object while shorting the following pad.
Note: Be careful not to reset the customer's unit. If “DIGITIZER” is displayed, turn the power switch off
immediately, and try again.
10) Start the data communication (slave unit).
Operation : OK
BOTTOM VIEW
Short the pad
Enlarge
RECEIVING
ITEMS 00001
SEND ALL DATA ?
OK ESC

— 8 —
BLOCK DIAGRAM
TAB LSI
uPD3062W
CPU
HD62119A03
Forced off 2.3V
Main battery
Low battery 2.5V
Back uo battery
Low battery 2.6V
Detector : IC7
Detector : IC6
Detector : IC8
Communication Jac
k
AD converter
TC35093
TC74LCX240
TXR
TXL
TYU
TYD Touch PanelLCD
ROM
MB834000CPF-G-4EP
RAM
CXK581000AM