Casio SF-5580RS, SF-5780RS Service Manual

(without price)

INDEX

SF-5580RS/5780RS(ZX-460)

JAN. 1998

SF-5780RS

CONTENTS

1.SPECIFICATIONS....................................................................................................1

2.GENERAL GUIDE

2-1.Appearances and display indicators.........................................................................3

2-2.Power Supply...............................................................................................................4

2-3.EL backlight.................................................................................................................5

3.RESET OPERATION................................................................................................6

4.BATTERY REPLACEMENT.....................................................................................8

5.DATA COMMUNICATIONS....................................................................................10

6.OPERATION CHECK..............................................................................................11

7.ERROR MESSAGES..............................................................................................14

8.LSI PIN FUNCTION................................................................................................16

9.SCHEMATIC DIAGRAMS

9-1.Main PCB ASS’Y (A342054*13)-(1/4)........................................................................17

9-1.Main PCB ASS’Y (A342054*13)-(2/4)........................................................................18

9-1.Main PCB ASS’Y (A342054*13)-(3/4)........................................................................19

9-1.Main PCB ASS’Y (A342054*13)-(4/4)........................................................................20

9-2.Keyboard PCB ASS’Y (A342241*1)-(1/3)..................................................................21

9-2.Keyboard PCB ASS’Y (A342241*1)-(2/3)..................................................................22

9-2.Keyboard PCB ASS’Y (A342241*1)-(3/3)..................................................................23

10.DISASSEMBLY PROCEDURE...............................................................................24

11.PARTS LIST............................................................................................................27

12.EXPLODED VIEW..................................................................................................29

1. SPECIFICATIONS

■ Model: SF-5580RS/SF-5780RS

Main Modes:

Telephone Directory, Memo, Schedule Keeper, To Do, Expense Manager, Reminder, Calendar, Home Time, World Time, Calculator, Conversion (metric/currency) and Game (Poker/21)

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 average

Calculation:

12-digit arithmetic calculations; independent memory; percentages; square roots; other mixed calculations

■ General:

Display element: 26-column × 8-line LCD Memory capacity: SF-5580RS: 128 KB

SF-5780RS: 256 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 minutes 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 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: 8.8 H × 163 W × 169 D mm (3/8 "H × 67/16 "W × 65/8 "D) Folded: 21.5 H × 163 W × 91.5 D mm (7/8 "H × 67/16 "W × 35/8 "D)

Weight: Approximately 250 g (8.8 oz) including batteries

— 1 —

■ Memory Capacity

Memory capacity differs according to model.

Model Memory

SF-5580RS:128 KB SF-5780RS:256 KB

The following shows the number of items that can be stored in each model.

Telephone Directory

8-character name, 10-character Phone ( ) 1 number SF-5580RS/SF-5780RS: 4,500/10,000

8-character name, 10-character Phone ( ) 1 number, 20-character address ( ) SF-5580RS/SF-5780RS: 2,300/5,000

Memo

20-character memo SF-5580RS/SF-5780RS: 3,900/8,500

To Do

20-character description SF-5580RS/SF-5780RS: 3,600/8,000

Schedule Keeper

20-character description, alarm time setting SF-5580RS/SF-5780RS: 3,000/6,600

Reminder

10-character description SF-5580RS/SF-5780RS: 4,200/9,200

Expense Manager

10-character description SF-5580RS/SF-5780RS: 4,000/8,900

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2. GENERAL GUIDE

Mode key

Memory keys

Display

key

Mode keys

key

keyboard

10-key pad Operator keys

key

Cursor keys

keys

2-1. Appearances and display indicators

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 causes the backlight to turn on for about 15 seconds, and then turn off automatically. Pressing and then 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 again. Failure of the backlight to turn on indicates low battery power. Replace batteries as soon as possible.

— 3 —

■ Display Indicators

1 Telephone Directory Mode 2 Memo Mode 3 To Do Mode 4 Reminder Mode 5 Schedule Keeper Mode 6 Calendar Mode 7 Expense Manager Mode 8 Home Time/World Time Mode 9 Calculator Mode 0 Conversion Modes A Game Modes B Indicates data above C (SHIFT) key operation

D Upper-case input E (ENGLISH/RUSSIAN)

key operation

F (NEW/EDIT) screen G Index display H Data display I Snooze feature activated J Daily alarm on K Key sound on L Memory locked M Low battery warning N Indicates data below

2-2. Power Supply

Your Digital Diary is powered by two AAA-size batteries, and its memory is protected by a single CR2032 lithium battery.

■ Low battery Warning

Failure of anything to appear on the display after you turn on power or appearance of the low battery message, “

” (followed by the display turning off in about 10 seconds) normally indicates that main

battery power is low. Note, however, that pressing the button on the back of the unit and then performing steps

1 and 2 of the procedure under “When to press for “no”” above can sometimes restore normal operation. When the low battery message appears on the display even if you perform these steps, it means you should replace the main batteries as soon as possible.

Note

• Take care that you do not make a mistake and delete memory contents at this time.

Important!

• Replace batteries only when low battery power is indicated by failure of the Digital Diary to turn on when you press the key. Do not replace batteries as long as the Digital Diary turns on normally when you press the key.

• There is no low battery warning for the back-up battery. Be sure to replace the back-up battery once every 5 years.

• Be sure you keep a separate copy of all important data that you store in the Digital Diary.

— 4 —

■ Battery Precautions

Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the Digital Diary. Note the following precautions.

• Be sure that the positive (+) side of each battery is facing in the correct directions.

• Never mix batteries of different types.

• Never mix old batteries and new ones.

• Do not expose batteries to direct heat, let them become shorted, or try to take them apart.

• Never leave dead batteries in the battery compartment.

• Remove batteries if you do not play to use the unit for a long time.

• Replace batteries at least once every five years, no matter how much you use the unit during that period.

• Never try to recharge the batteries that come with the unit.

• Should a battery leak, clean out the battery compartment of the unit immediately, taking care to avoid letting battery fluid come into direct contact with your skin.

Keep batteries out of the reach of small children. If swallowed, consult with a physician immediately.

2-3. EL backlight

• This unit is equipped with an EL backlight that allows easy viewing of display contents in a theater, or anywhere else where lighting is dim.

• Note, however, that frequent or extended use of the EL backlight shortens battery life.

The following shows how backlight use affects battery life under controlled test conditions.*

Backlight Operation Battery Life

3 minutes per hour Approximately 80 hours

15 minutes per hour Approximately 45 hours

* Test Conditions

• “Battery Life” is the number of hours before battery failure when the unit is left on with 5 minutes of a processing operation and 55 minutes of continuous display only (no processing operation) per hour, plus the backlight operation described below.

• “Backlight Operation” is the number of minutes the backlight is turned on per hour during the display only (no processing operation) period.

— 5 —

3. RESET OPERATION

Use the following procedure to reset the unit to its initial settings.

Important!

• Do not use a very sharp pencil or other object to press the button.

• Be sure to reset the unit before using it for the first time.

• Perform the reset operation only after main batteries and back-up battery are correctly installed.

• Be sure to press the button after loading main batteries for the first time or if the previous set of batteries went dead.

START button

START

■ To start the all-reset operation

1. Turn power off.

2. Press the button on the back of the Digital Diary with a thin, pointed object.

3. Now you should press for “yes” or for “no” in accordance with the conditions described below.

When to press for “yes”

• When this is the first time you are using the unit.

• When you want to reset the unit and clear all data and settings.

• When you are resetting the unit after a data error (page 14).

1. Press in response to the message that appears on the display when you start the all-reset operation.

2. Press to reset the Digital Diary or to abort.

• At this time the message “ ” appears.

• After about two seconds, the Home Time screen appears.

— 6 —

3. Press , select “ ”, and then use the procedure on page 18 of the User’s Manual to set the Home Time.

• If you turn power off without setting the Home Time, the “ ” message appears the next time you turn power on. The Digital Diary will not operate properly until you set the Home Time.

When to press for “no”

• After replacing the main batteries.

• When you are not resetting the unit to clear all data and settings.

• When you are not resetting the unit after a data error (page 14).

1. Press in response to the message that appears on the display when you start the all-reset operation.

• At this time the message “ ” appears.

• After about two seconds, the Home Time screen appears.

2. Press , select “ ”, and then use the procedure on page 18 of the User’s Manual to set the Home Time.

• If you turn power off without setting the Home Time, the “ ” message appears the next time you turn power on. The Digital Diary will not operate properly until you set the Home Time.

• Following are the initial settings of the unit after you perform the all-reset operation. Home Time: (Moscow)

(January), 1998 ( (Thursday) 0:00 24-hour format

World Time: (London) Daily Alarm: 0:00 Sound: Daily alarm — OFF

Key — ON

Keyboard: Cyrillic Character input: CAPS — OFF

— 7 —

4. BATTERY REPLACEMENT

■ To replace the main battery

Important!

• Do not remove the main batteries from the Digital Diary while the back-up battery is removed.

• Be sure to replace both batteries with two new ones. Do not mix an old battery with a new one.

• Be sure to press the button after loading main batteries for the first time or if the previous set of batteries went dead.

1. Press to turn power off.

2. Remove the screw that holds the battery compartment cover in place and open the cover.

START

3. Remove both old batteries and replace them with new ones.

• Make sure that the positive (+) and negative (–) ends are facing correctly.

4. Replace the battery compartment cover and secure it with its screw.

• Take care that you do not overtighten the screw.

5. Press the button.

• This causes the message “ ( )” to appear. Be sure to press in response to this message (pressing will delete all data in

memory). Next, continue with the procedures in the section title “3. RESET OPERATION” on page

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+ 22 hidden pages