Casio SF-4300A Guía de solución de problemas

JAN. 1993

(without price)

SF-4300A(LX-571AT)

SF-4600(LX-571ET/FT)

INDEX

CONTENTS

1. SCHEMATIC DIAGRAM.................................................................................................... 1

2. SPECIFICATIONS ............................................................................................................. 3

3. TO REPLACE THE BATTERIES....................................................................................... 4

4. DATA TRANSFER............................................................................................................. 5

5. BLOCK DIAGRAM ............................................................................................................ 9

6. LSI, IC (Pin Function) ..................................................................................................... 10

7. To FIX TAB ASS'Y ........................................................................................................... 13

8. TROUBLE SHOOTING.................................................................................................... 14

9. HARD CHECK ................................................................................................................. 17

10. DATA TRANSFER CHECK ............................................................................................. 22

11. PCB VIEW........................................................................................................................ 26

12. ASSEMBLY VIEW ........................................................................................................... 27

13. PARTS LIST .................................................................................................................... 29

— 1 —

1. SCHEMATIC DIAGRAM

1-1. MAIN PCB

— 2 —

1-2. KEY MATRIX

— 3—

2. SPECIFICATIONS

Data storage:

Storage and recall of telephone, memo, schedule, reminder data; calendar display; mark

protection; secret area; editing; memory status display

Clock:

World time; reminder alarm; schedule alarm; daily alarm; accuracy under normal tempera-

tures: ±3 seconds average

Calculation:

10-digit arithmetic calculations; arithmetic constants (+, –, ×, ÷); independent memory;

percentages; square roots; 20-digit approximations; date calculations; other mixed calcula-

tions

General:

Display element: 16-column ×4-line LCD

Memory capacity: 32 KB / SF-4300A, 64 KB / SF-4600

Main component: LSI

Power supply: 3 lithium batteries (CR2032)

Power consumption: 0.05W

Battery life: Approximately 200 hours continuous operation in Telephone Directory

approximately; 150 hours repeating one minute of input and 10 minutes

of display in Telephone Directory; approximately 12 months for memory

back up

Test condition: 20°C

Auto power off: Approximately 6 minutes after last key operation

Operating temperature: 0°C ~ 40°C (32°F ~ 104°F)

Dimensions:

Unfolded: 12.4H x141W x80.5Dmm (1/2"H x 5-5/8"W x3-1/8"D)

Folded: 8.9H x141W x157Dmm (3/8"H x 5-5/8"W x6-1/4"D)

Weight: 110g (3.9 oz)

Current consumption:

Power switch MIN. [µA] MAX [µA]

OFF 9.51

ON 529 606

ON 1,287 1,398

(Operating)

— 4—

3. TO REPLACE THE BATTERIES

1) Loosen the screw on the back of the SF-4300A /

SF-4600 that holds the battery compartment

cover in place, and remove the cover.

2) Loosen the screw that secures one of the three

battery holders in place and remove the battery

holder.

Caution

Be sure to remove only one battery at a time.

Otherwise, you will lose all data stored in memory.

3) Replace the old battery with a new one, making

sure that the positive (+) side of the new battery

is facing up (so you can see it).

4) Replace the battery holder and secure it by tightening its screw.

• Be sure careful that you do not over tighten the screw.

5) Repeat steps 2) through 4) for the other two batteries.

• Be sure to replace all three batteries. Never mix old batteries with new ones, and be sure

to use CR2032 lithium batteries only.

6) After you replace all three batteries, replace the battery compartment cover and secure it

by tightening its screw.

• Be careful that you do not over tighten the screw.

Screw

— 5—

ON CAL TIME TIME TIME M+

DATE DATE DATE R

2) Turn on the power switch of each machine.

3) The slave machine must be set the date of Feb. 3rd, 1901 into the memory under the

calculator mode.

Operation:

If you don't set the date, the "PASSWORD" isn't transferred to the slave machine.

123

4. DATA TRANSFER

SF-4300A / SF-4600 can transfer customers data to other SF-4300A / SF-4600 with memory

protection only when replacing the LCD or the outer case. How to transfer the data.

* Before connecting the cable (SB-60/62), be sure to reset the slave machine to clear all

data.

1) Turn off the power switch and connect the two units using the cable (SB-60/62) as shown

in the drawing.

M SUN

1901/ 2/ 3

SB-60/62 accessory cable

— 6—

Setting up for Data Communications

The following procedures describe what you should do to set up for data communications

between two SF Units or between an SF Unit and a personal computer. In addition to

hardware connections, it details how to set up the communications parameters and how to

set up the SF-4300A / SF-4600 to receive data. By following these instructions carefully,

you can be ensured of successful communications every time.

To connect two SF Units

1. Check to make sure that the power of the two SF Units is switched off.

2. Remove the covers from the connectors on the two SF Units.

3. Connect the two SF Units using the optional SB-60/62 cable. You can also connect

them using an SB-60/62 cable.

Important

Be sure to replace the connector covers on the SF Units when you are not performing data

communications.

4) Check the hardware parameters.

1 While an initial screen is displayed, press FUNC twice to display the second function

menu.

• You can perform the above operation while the initial screen of the Telephone

Directory, Memo Mode, Schedule Keeper, Calendar, Reminder is displayed.

2 Press 4 to select DATA COMM.

3 Press 3 to select SET UP.

FUNC FUNC

2 ALL DELETE

3 LABEL EDIT

4 DATA COMM

CAPS

1 SEND

2 RECEIVE

3 SET UP

4 FDD

CAPS

SET UP

PARITY E O N

BIT LENGTH 78

BPS 2400 4800

CAPS

— 7—

∇

∆

SET

2 ALL DELETE

3 LABEL EDIT

4 DATA COMM

CAPS

1 SEND

2 RECEIVE

3 SET UP

4 FDD

CAPS

RECEIVE OK

TO STOP

PRESS (ESC)

CAPS

DATA

2 ALL DELETE

3 LABEL EDIT

4 DATA COMM

CAPS

FUNC FUNC

4 If the units have another condition, reset as above.

• To change the parameters

1. Use the ∆and — cursor keys to change the selected parameter on the display.

2. Use the and cursor keys to change the high-lighted setting of the currently

selected parameter.

3. Press SET to store them in memory.

5) Set up the slave machine

1 While an initial screen is displayed, press FUNC twice to display the second function

menu.

• You can perform the above operation while the initial screen of the Telephone

Directory, Memo Mode, Schedule Keeper, Calendar, Reminder is displayed.

2 Press 4 to select DATA COMM.

3 Press 2 to select RECEIVE.

6) Set up the customer’s machine.

1 While an initial screen is displayed, press FUNC twice to display the second function

menu.

• You can perform the above operation while the initial screen of the Telephone

Directory, Memo Mode, Schedule Keeper, Calendar, Reminder is displayed.

— 8—

2 Press 4 to select DATA COMM.

3 Press 1 to select SEND.

4 Press 3 to select ALL DATA.

5 Press SET to start the send operation or ESC to abort the operation without sending

anything.

• Data is send in the sequence: Telephone Directory, Memo Mode, Reminder Mode,

Schedule Keeper, Calendar.

• To abort the send operation at any time, press ESC.

• If an error occurs during the send operation, the message “SEND ERROR!” appears

on the display. Press ESC to clear the error message.

6 After the send operation is complete, the display returns to the initial screen of the mode

you were in when you started this procedure.

1 ONE ITEM

2 MODE DATA

3 ALL DATA- SEND -

CAPS

1 SEND

2 RECEIVE

3 SET UP

4 FDD

CAPS

SEND ALL DATA?

SET/ESC

CAPS

SENDING

TO STOP

PRESS (ESC)

CAPS

DATA

SET / ESC

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