Casio SF5300B Service Manual

SF-5300B(LX-547)

SEP. 1994

(with price)

SF-5300B

R

CONTENTS

1. SCHEMATIC DIAGRAM

1-1. MAIN PCB..................................................................................................................1

1-2. KEY MATRIX 1 ..........................................................................................................2

1-3. KEY MATRIX 2 ..........................................................................................................3

2. SPECIFICATIONS ............................................................................................................5

3. REPLACING THE BATTERIES ........................................................................................6

4. RESETTING THE UNIT ....................................................................................................7

5. SAVING DATA..................................................................................................................8

6. LSI PIN FUNCTIONS

6-1. CPU:LSI1 .................................................................................................................12

6-2. RAM:LSI2 AND LSI3 (CXK58257) ..........................................................................13

6-3. VOLTAGE REGULATOR:REG1 (S-81253) ............................................................14

6-4. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ........................................................14

7. TROUBLESHOOTING ....................................................................................................15

8. DIAGNOSTICS................................................................................................................18

9. ASSEMBLY VIEW ..........................................................................................................23

10. PARTS LIST....................................................................................................................25

1. SCHEMATIC DIAGRAM

1-1. MAIN PCB

— 1 —

1-2. KEY MATRIX 1

— 2 —

1-3. KEY MATRIX 2

HS3

FG
FG
KY1
KY2
KY3
KY4
KY5
KY6
KY7

To Display

KY8
FG
FG

1
2
3
4
5
6
7
8
9
10
11
12

KY1

KY1
KY2
KY3
KY4
KY5
KY6
KY7
KY8

KY2

M– M+

KY3

CODE:03CODE:02

MR

CODE:01

KY4

%

CODE:07

'

CODE:06

MC

CODE:00

KY5

÷

CODE:11

9

CODE:10

C

CODE:05

AC

CODE:04

KY6

x

CODE:15

6

CODE:14

8

CODE:09

7

CODE:08

KY7

–

CODE:19

3

CODE:18

5

CODE:13

4

CODE:12

0

CODE:20

KY8

+

CODE:23

=

CODE:22

2

CODE:17

1

CODE:16

.

CODE:21

FG

— 3 —

2. SPECIFICATIONS

Display element: 16-column × 4-line LCD
Memory capacity: 64 kB (60972 bytes)
Main component: LSI
Power supply: 2 lithium batteries (CR2032)
Power consumption: 0.05 W
Battery life:

Approximately 400 hours continuous operation in Telephone Directory
Approximately 350 hours repeating one minute of input and 10 minutes of display in Telephone
Directory
Approximately 12 months for memory backup

Auto power off: Approximately 6 minutes after last key operation
Ambient
temperature range: 0°C ~ 40°C (32°F ~ 104°F)
Dimensions (HWD):

Unfolded: 8.4 x 139 x 148 mm (3/8 x 5 1/2 x 5 7/8 inches)
Folded: 15.8 x 139 x 74 mm (5/8 x 5 1/2 x 2 7/8 inches)

Weight: 98.2 g (3.5 oz)

Current consumption:

Power Switch Maximum [µA]

OFF 11.0

ON 510

— 5 —

3. REPLACING THE BATTERIES

1. Loosen the screw on the back of the SF-5300B that
holds the battery compartment cover in place, and
remove the cover.

2. Loosen the screw that secures one of the two 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. Be 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 careful that you do not overtighten the screw.

5. Repeat Steps 2 through 4 for the other battery.

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

CR2032 lithium batteries only.

Screw

RESET

6. After you replace both batteries, replace the battery compartment cover and secure it by tightening
its screw.

• Be careful that you do not overtighten the screw.

— 6 —

4. RESETTING THE UNIT

The following procedures erase all data stored in the memory of the SF-5300B.

RESET Button

RESET

1. Turn on the unit and press the RESET button with a thin, pointed object.

ALL DATA
CLEAR!

OK? Y/N

CAPS

2. Press Y to reset the memory and delete all data, or N to abort the reset
operation without deleting anything.
Following the reset operation described above, the Home Time display appears and the SF­5300B settings are initialized as noted below.

Home Time: 12-hour format

JAN/1/1995

AM/12:00 00
Zone: London(LON)
World Time: New York(NYC)

Sound: Schedule alarm → ON

Reminder alarm → ON
Daily alarm → OFF
Key → ON

Character Input: CAPS

Daily Alarm: 12:00 PM

— 7 —

5. SAVING DATA

The SF-5300B can transfer the customer's data (both the open and secret areas) to another SF-5300B.

• Turn off both the transmitting and receiving units and connect them using the SB-60/62 cable.

SB-60/62

1 Setting up the receiving unit:

1. Do the reset operation.

2. Enter the calculator mode. Set the date of receiving unit to February 3rd, 1901.

Operation:

TIME

MENU

ON

Note: The customer may have created a password to protect confidential information from
unauthorized access. To be sure this password is transferred to the receiving unit, be sure
to set the date as described above.

61

M SUN

1901/ 2/ 3

DATE

2

TIME

DATE

TIME

3

DATE

M+

R

— 8 —

3. Press , , and twice.

MENU

1

FUNC

1* TO SECRET AREA
2 ALL DELETE
3 LABEL EDIT
4 DATA COMM

CAPS

*If the password isn't

registered in the SF-5300B,
the display shows X instead
of "1."

4. Press to select DATA COMM.

4

1 SEND
2 RECEIVE
3 SET UP PAR.

CAPS

5. Press to select RECEIVE.

2

DATA

CAPS

RECEIVE OK
TO STOP

PRESS (ESC)

— 9 —

2 Setting up the transmitting unit:
Set the hardware parameters as follows:

Parity: None Bit length: 7 BPS: 9600

1. Press , , and .

2. Press twice.

ON

FUNC

MENU

1

1* TO SECRET AREA
2 ALL DELETE
3 LABEL EDIT
4 DATA COMM

CAPS

3. Press to select DATA COMM.

4

1 SEND
2 RECEIVE
3 SET UP PAR.

CAPS

4. Press to select SET UP.

3

*If the password isn't

registered in the SF-5300B,
the display shows X instead
of "1."

✻✻ SET UP PAR. ✻✻✻

PARITY E O N
BIT LENGTH 7 8
BPS 4800 9600

CAPS

5. Use , , , or to select "N," "7," and "9600" and press .

SET

1 SEND
2 RECEIVE
3 SET UP

CAPS

— 10 —

6. Press to select SEND.

1

1 ONE ITEM
2 MODE DATA
3 ALL DATA

- SEND -

CAPS

7. Press to select ALL DATA.

3

SEND ALL DATA?

SET/ESC

CAPS

8. Press to start data transmission or to abort the operation without sending

SET

ESC

anything.

SENDING

DATA

TO STOP
PRESS (ESC)

CAPS

• If an error occurs during data transmission, the message “TRANSMIT ERROR!” appears on
the display. Press to clear the error message.

ESC

9. After data transmission is complete, the display returns to the initial screen of the telephone
mode.

— 11 —

6. LSI PIN FUNCTIONS

6-1. CPU: LSI1

No.1

Pin No. Name I/O Description

1 ~ 5 C0 ~ 4 Out Common signal for display

6 GND In GND 0 V

7,8 BZ1,2 Out Buzzer terminal

9 VDD In Power supply terminal (+5.3 V)
10 CSRA1 Out Chip enable signal for LSI2
11 CSRA2 Out Chip enable signal for LSI3
12 CSROM Out Chip enable signal (Not used)
13 WEB Out Write enable signal for LSI2 and LSI3

14,15 RA15,16 Out Address bus (Not used)
16 ~ 30 A0 ~ 14 Out Address bus
31 ~ 38 IO0 ~ 7 I/O Data bus
39 ~ 54 KY0 ~ 15 I/O Key signal

55 SW In Battery switch Power on: 0 V off: 6 V
56 DEBUG - Not used
57 ON Out Data communication enable signal
58 CRCKI In GND 0 V
59 SOUTB Out Transmission data output
60 SIN In Receiving data input
61 VDD In Power supply terminal (+5.3 V)
62 TEST - Not used
63 VTM - Not used

— 12 —

Pin No. Name I/O Description

64,65 OSC I/O I/O Clock terminal

67,69~71 V1 ~ 4 Voltage for LCD drive

OFF: 0 V ON–V1: 0.64 Minimum ~ 1.29 Maximum V

V2: 1.29 Minimum ~ 2.56 Maximum V
V3: 3.99 Minimum ~ 2.71 Maximum V

V4: 4.64 Minimum ~ 3.99 Maximum V
68 NC - Not used
72 INTO In Low battery detection INTO < 5.2 V => No power on
73 STNT - GND 0 V
74 VLCD In Power supply terminal (+5.3 V)

75 ~ 171

172 ~199

168,200 NC - Not used

6-2. RAM: LSI2 and LSI3 (CXK58257)

S0 ~ 95 Out Segment signal for display
C5 ~ 32 Out Common signal for display

22

OE–

23

A11

24

A9

25

A8

26

A13

27

WE–

28

VCC

1

A14

2

A12

3

A7

4

A6

5

A5

6

A4

7

A3

Pin No. Name I/O Description

1~10,21,23~26 A0 ~ 14 In Address bus

11~13,15~19 IO1 ~ IO8 I/O Data bus

14 GND In GND 0 V
20 CE In Chip select signal from LSI1
22 OE In 0 V
27 WE In Write enable signal from LSI1
28 VCC In Power supply terminal (+ 5.3 V)

(LSI 2)

CXK58257ATM

A10
CE–
IO8
IO7
IO6
IO5
IO4
GND
IO3
IO2
IO1
A0
A1
A2

21
20
19
18
17
16
15
14
13
12
11
10
9
8

— 13 —

6-3. VOLTAGE REGULATOR: REG1 (S-81253)

Output Voltage (VDD): 5.3 V ± 5%

VCC

GND

2

R

A

+

V

–

REF

R

B

1

6-4. VOLTAGE DETECTOR: DET1 (RH5VL46CA)

VCC

2

OUT

1

3

VDD

R

I

1

GND2VCC

3

VDD

3

2

1

GND

VCC

OUT

3

GND

Input Voltage (VCC) Output Voltage (OUT)

VCC > 5.2 V 5.2 V
VCC < 5.2 V 0 V

— 14 —

7. TROUBLESHOOTING

No power on

START

Is the display contrast adjustment OK?

Are the power of batteries strong enough?

N

Adjust the display contrast.

Y

N

Replace the batteries.

Y

Does the display appear by pressing
the reset button?

N

Does the unit sound with each key entry?

N

Do the batteries make positive contact
with the battery springs?

Y

Y

Is Pin 3 of REG1 5.3 V?

N

Are the capacitors C8, C9, C10, C11,
C12, and C13 OK?

Y

Y

Check another function.

Y

Refer to "No/Erratic Display."

N

N

Adjust the contact and clean the
battery springs.

Replace C8, C9, C10, C11, C12, or
C13.

Replace REG1.

1

— 15 —

1

Is Pin 1 of DET1 5.2 V?

Y

Is Pin 11 of LSI1 sending the signal?

Y

Is Pin 13 of LSI1 sending the signal?

Y

Is the soldering of LSI2 or LSI3 poor?

N

Replace LSI1, LSI2, or LSI3.

N

Replace DET1.

N

Replace LSI1.

N

Replace LSI1.

Y

Resolder.

No key input

START

Does the rubber key contact make positive
contact with the PCB assembly?

Y

Is the soldering of LSI1 poor?

N

Replace LSI1.

N

Replace the rubber key contact.

Y

Resolder.

— 16 —

No/Erratic display

START

Are the power of batteries strong enough?

Y

Is input Pin 2 of REG1 6 V?

Y

Is output Pin 3 of REG1 5.3 V?

Y

Are the voltages of V1, V2, V3, and V4
strong enough?

V1: 1.3 V
V2: 2.5 V
V3: 2.7 V
V4: 3.9 V

Note:
Contrast: Maximum

N

Replace the batteries.

N

N

N

Adjust the contact and clean
the battery springs.

Replace REG1.

Replace C1, C2, C3, or C4.

Is the soldering of LSI1 poor?

Replace LSI1.

High current consumption

START

Is there any short circuit on the PCB
assembly ?

Are the capacitors C8, C9, C11, C12,
and C13 OK?

Y

Y

Resolder.

N

Y

Repair shorts.

N

Y

Resolder or replace LSIs and ICs.

N

Replace the capacitor(s).

— 17 —

Blind Label

Battery Switch

Check Pads

8. DIAGNOSTICS

Notes: 1. Be sure to transfer data to another SF-5300B unit before entering

the diagnostic mode, because the data will be changed by entering
the diagnostic mode.

2. The shorting pads shown in the following illustration are covered by a
blind label.

3. To exit the diagnostic mode, press the reset button.

To enter the diagnostic mode:

1. Slide the battery switch to the up position.

2. Press while shorting the shorting pads.

3. Press .

ON

SELF TEST PROG.

PRESS SEARCH

QUIT BY OFF

CASIO APR 1994

SEARCH

TEST 2 MEMORY
MENU 3 KEY

4 BUZZER

1 DISP 5 I/F

5 I/F: Not used

— 18 —

Display Check

Operation Display Note

Press 1 on the TEST MENU.

1

2

DISP 4 RVS.
1 WHITE 5 FRAME
2 BLACK 6 DOT4
3 CHECK. 7 TIME

Display check
To return to the

TEST MENU,

ESC

press .

No display

All dots displayed

4

5

3

ACC CAPS SHIFT

,

Checker displayed

SEARCH

Reverse checker
display

Frame display

— 19 —

Operation Display Note

6

7

ESC

Memory Check

TIME DISPLAY

00:00:XX

TEST 2 MEMORY
MENU 3 KEY

4 BUZZER

1 DISP 5 EXT

Shows dots at
corners.

Check to see if
timer is working.

The functions of the numbered items on the display include:

1. Writes the test pattern in the ROM to the RAM area. (Test pattern: Incremental order 00,
01, and so on)

2. Compares the test pattern with the write data (WRITE1) of the RAM and displays the
results.

3. Writes the test pattern in the ROM to the RAM area. (Test pattern: Decremental order
FF, FE, and so on)

4. Compares the test pattern with the write data (WRITE2) of the RAM and displays the
results.

Operation Display Note

2

1
( or 3 )

MEMORY 3 WR2

4 READ2
1 WR1 5 DUMP
2 READ1 6 CHKSUM

WRITE1
( or WRITE2 )

RAM check
To return to the

TEST MENU,
press .

ESC
5: Not used
6: Not used

— 20 —

Operation Display Note

(After a few seconds)

2
( or 4 )

MEMORY 3 WR2

4 READ2
1 WR1 5 DUMP
2 READ1 6 CHKSUM

EXECUTING!!

COMPLETE!!

64KB

DATA ERROR!!
ADDRESS CORR RAM
XXXX XX XX

RAM error
If the displayed address

is within 0000-7FFF,
check LSI3.
If the displayed address
is within 8000-FFFF,
check LSI2.

ESC

MEMORY 3 WR2

4 READ2
1 WR1 5 DUMP
2 READ1 6 CHKSUM

Key Check

Each key has its own key code. The key codes are assigned incrementally from left to right on the key
board. (Refer to the keyboard in the schematic diagrams.)
In the auto mode, the key input sequence is limited so that the keys must be pressed in the order of the
key code as mentioned above. If a key is pressed in the wrong order, the SF-5300B beeps.

Operation Display Note

Key check
To return to the

TEST MENU,
press .

ESC

Press 3 on the TEST MENU.

2

KEY 1 RANDOM

2 AUTO

No display

— 21 —

Operation Display Note

MC MR M– M+
AC , ... % 7 , ... ÷
4 , ... x 1 , ... –
0 , ... + ON OFF
EXPENSE , ... DISP CHNG
REMINDER , ... DEL
← ↑ ↓ → ESC , ... ( )
FUNCTION , ... SHIFT , ...
SHIFT CAPS , ... SET

SEARCH

Buzzer Check

Operation Display Note

Press 4 on the TEST MENU.

00 01 02 03 04 ...............

............... 56 57

TEST 2 MEMORY
MENU 3 KEY

4 BUZZER
1 DISP 5 EXT

BUZZER 1 BEEP

2 ALARM1
3 ALARM2

Check that the key
number appears on
the display.

To return to the TEST
MENU, enter
SEARCH .

Buzzer check
To return to the

TEST MENU,
press .

ESC

1
( or 2 , 3 )

ESC

EXECUTING!!

BUZZER 1 BEEP

2 ALARM1
3 ALARM2

TEST 2 MEMORY
MENU 3 KEY

4 BUZZER

1 DISP 5 EXT

Check the sound.
To return to the

BUZZER menu,
press any key.

— 22 —

17

38

18

19

22

21

23

24

25

39

39

38

16

14

13

39

15

12

11

20

9

38

1

2

3

4

6

31

41

8

5

32

26

6-1

33

34

30

27

42

35

41

6-2

28

40

37

9. ASSEMBLY VIEW

10

36

29

39

41

7

— 23 —

10. PARTS LIST

FOB Japan

N Item Code No. Parts Name Specification Q M N.R.Yen R

Unit Price

DISPLAY PCB ASS'Y

N 1 6412 2750 Display PCB ass'y DB22XX3F01M

(Consists of the following:)

C1~4,7,8,12,13,14 2845 1540 Chip capacitor MCH212F104ZK

C5,6 2845 1652 Chip capacitor MCH215A180JK
N LSI1 6411 6351 COF sub ass'y C312133*3
N LSI2 2011 8267 LSI CXK58257ATM-10/12L
N LSI3 2011 8274 LSI CXK58257AYM-10/12L
N LSI4 2011 9149 LSI µPD23C1001EAGZ-M04

X1 7110 0642 Crystal oscillator DT-26S
N R3 2797 3752 Chip resistor ERJ-6GEYJ000
N R4 2797 3752 Chip resistor ERJ-6GEYJ000

R11 2791 0777 Chip resistor ERJ-6GEYJ104

N R12 2797 3857 Chip resistor ERJ-6GEAK206

KEYBOARD PCB ASS'Y

N 6 6412 2730 Keyboard PCB ass'y DB22XX3100U

(Consists of the following:)

C9,11 2803 6806 Electrolytic capacitor 10MS510M-MW

C10 2845 1540 Chip capacitor MCH212F104ZK

D1 2390 2128 Chip diode MA740-(TX)

D2 2390 0364 Schottky diode MA713-(TX)

DET1 2105 3864 CMOS IC RH5VL46CA-T1

REG1 2105 3290 CMOS IC S-81253SGUP-DIJ-T1

J1 3501 6538 Jack HSJ1169-012010

N R5 2797 3759 Chip resistor ERJ-6GEYJ182

R6 2797 0637 Chip resistor ERJ-6GEYJ473

R7 2797 1309 Chip resistor ERJ-6GEYJ102

R8,9 2797 1078 Chip resistor ERJ-6GEYJ101

N R20 2797 3752 Chip resistor ERJ-6GEYJ000

Q1 2259 0959 Chip digital transistor DTC114YKT-146

6-1 6409 6300 Spring Battry (+) EF01DB20102
6-2 6409 6310 Spring Battry (-) EF02DB10100

COMPONENT

N 2 6412 3110 Protection tape HGJ00008406

3 6412 3140 Heat seal FX21P250016
N 4 6412 3120 Protection tape HGJ00008201
N 5 6412 2920 Insulation plate EL4J0002102

7 6511 7160 Cap LC120000102

8 6412 2890 Key contact rubber LADB2210000

9 6512 0730 Hinge stopper EF15DB06102

10 6412 2880 Push button FB3DB221002
11 6412 3020 Upper case (KB) FAADB221009

N 12 6412 3050 Hinge (A) FC0DB281006

13 6512 1210 Pin FC002870000

14 6512 1220 Pin (L) FC002870018
N 15 6412 2910 Hinge (B) FC0DB222002
N 16 6412 2990 Hinge blind tape HGJ00008309
N 17 6412 2940 Display plate EL5J0005103
N 17 6412 2950 Display plate (for B.O.S.S.) EL5J0005201

18 6412 3040 Upper case (DIS) FAADB222005

19 6412 3130 Heat seal FX200P40064

20 3335 5264 LCD CD792-TS

Notes: N – New parts R – A : Essential

M – Minimum order/supply quantity B : Stock recommended
R – Rank C : Others
Q – Quantity used per unit X : No stock recommended

1 2,730 B

1

20 4 C

8

20 3 C

1

1 970 B

1

1 580 B

1

1 580 B

1

1 370 B

1

557B

1

20 2 C

1

20 2 C

1

20 5 C

1

20 2 C

1

1 790 B

1

20 13 C

2

20 4 C

1

10 50 C

1

10 33 C

1

10 45 C

1

560C

1

556C

1

20 2 C

1

20 2 C

1

20 3 C

1

20 3 C

2

20 2 C

1

20 12 C

1

20 16 X

2

20 16 X

2

20 19 B

1

553A

1

20 26 B

1

10 29 X

1

20 17 B

1

1 260 C

1

20 27 X

2

20 13 C

1

1 130 X

1

20 26 X

1

20 9 X

2

20 16 X

2

20 22 X

1

20 22 B

1

1 120 B

1

1 120 B

1

1 110 X

1

1 100 A

1

1 790 A

1

— 25 —

FOB Japan

N Item Code No. Parts Name Specification Q M N.R.Yen R

Unit Price

21 6411 8460 Cushion FH100027205

22 6412 2900 Key contact rubber LADB2220005

23 6412 3160 Heat seal FX201P50209
N 24 6412 3150 PCB DADB22XX309
N 25 6412 2840 Lower case (DIS) FABDB222001
N 25 6412 2850 Lower case (DIS) (for B.O.S.S.) FABDB222010

26 6409 6120 Battery holder ECDB1011108

27 6409 6210 Battery change label HGC00001102

28 6412 3060 Battery cover FADDB221001

29 6409 6230 Battery cover label HGC00001200
N 30 6412 2980 Blind tape HGJ00008104
N 31 6412 3070 Lower case (KB) FABDB221005
N 31 6412 3080 Lower case (KB) (for B.O.S.S.) FABDB221013

32 6511 8400 Key rubber for reset LADB0220105

33 6512 1080 Nut MD100000602

34 6510 4440 Blind tape HGFC0001206

35 6408 5920 Switch ass'y DB2AXX4A00M*1

36 6510 4500 Buzzer tape HGFC0000501

37 3122 2380 Buzzer EFB-S55C41A8

38 6406 1610 Screw MAB20091300

39 6512 1000 Screw MABA0004207

40 6510 4350 Decoration screw MAA80006302

41 6512 0980 Screw MAB20086306

42 6510 4310 Decoration screw MAA80006311

565C

2

1 103 C

1

590A

1

563X

1

1 110 X

1

1 110 X

1

20 26 X

2

20 7 X

1

20 29 X

1

20 16 X

1

20 7 X

1

582X

1

582X

1

20 10 B

1

20 13 X

3

20 6 X

3

20 30 C

1

20 17 X

1

10 36 X

1

20 5 B

5

20 3 B

10

20 2 B

1

20 2 B

8

20 3 B

2

Notes: N – New parts R – A : Essential

M – Minimum order/supply quantity B : Stock recommended

R – Rank C : Others

Q – Quantity used per unit X : No stock recommended

— 26 —

MA1100741A