Casio SF8350 Service Manual

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Page 1

SF-8350(LX-572)

INDEX

JUNE 1993

(without price)

Page 2

CONTENTS

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

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

3. TO REPLACE THE BATTERY...................................................................................... 6

4. ERROR MESSAGE ....................................................................................................... 7

5. TO RESET THE DIGITAL DIARY ................................................................................. 7

6. TO SAVE THE DATA TO OTHER MACHINE............................................................... 8

7. TO CHECK THE MEMORY CAPACITY...................................................................... 11

8. DISASSEMBLY ........................................................................................................... 12

9. BLOCK DIAGRAM ...................................................................................................... 14

10. CIRCUIT EXPLANATIONS

10-1. System chart................................................................................................. 15

10-2. Power supply circuit .................................................................................... 16

10-3. Battery voltage detection ............................................................................ 19

10-4. CPU pin description ( 10-5. Gate array pin descriptions (

10-6. Power supply chip IC pin descriptions (SC371015FU) ............................. 21

10-7. Character generator ROM pin descriptions (HD62063B01) ..................... 22

10-8. Operation program ROM pin descriptions (

10-9. RAM pin descriptions (µPD43256AGU-10/12/15LL) .................................. 23

10-10. RAM pin descriptions (HM62L864LFP-12MRL) ......................................... 23

11. DIAGNOSTIC OPERATION ........................................................................................ 24

12. TROUBLE SHOOTING................................................................................................ 29

µPD3055GF002-2BA) ............................................... 21

µPD65005G-452-22)..................................... 21

µPD23C4001EBGW-301)..... 23

13. PARTS LIST ................................................................................................................ 32

14. PCB VIEW ................................................................................................................... 34

15. ASSEMBLY VIEW....................................................................................................... 35

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1. SCHEMATIC DIAGRAM

1-1. Main Block

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1-2. Display Block

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Page 5

1-3. Key Matrix

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Page 6

2. SPECIFICATIONS

Data storage:

Telephone/business card/memo/schedule data storage/recall, calendar display, marker, phrase memory, secret area, editing, capacity display, auto display

Clock:

Average of accuracy ±3 seconds per day under normal temperatures; worldtime, schedule alam, daily alarm

Calculation:

12-digit arithmetic calculations, constants for + / – / × / ÷ , independent memory, percentages, square roots, 24-digit approximations, date calculations, other mixed calculations

General: Display element: 32-column × 6-line LCD Memory capacity: 64 KB (56,006 bytes) Main component: LSI Power supply: Main Power Supply — Two CR2032 lithium batteries

Backup Power Supply — One CR2032 lithium battery

Power consumption: 0.05W Battery life: Main: Approximately 120 hours (Repeated cycle of 1-minute data input

into Telephone Directory followed by 10-minute display. Operation temperature of 20°C) Approximately 150 hours (Continuous display in Telephone Directory. Operation temperature of 20°C)

Backup: 5 years if main batteries are replaced as soon as they become weak.

1 year if dead main batteries are left in the unit.

Auto power off: Approximately 6 minutes after last key operation Operating temperature: 0°C ~ 40°C (32°F ~ 104°F) Dimensions: Unfolded: 10.5H × 154W × 155.2mmD (3/8"H × 6"W × 61/8"D)

Folded: 17.9H × 154W × 78mmD (3/4"H × 6"W × 31/16"D)

Weight: 152.5g (5.4 oz) including batteries

Current consumption:

Power switch TYP. [µA] MAX [µA] OFF 8 29 ON 1,447 13,258 ON (Operating) 6,707 19,958

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3. TO REPLACE THE BATTERY

A) To replace the main batteries

Before replacing the main batteries, note the following precautions.

•Do not remove the back-up battery from the SF Unit while main batteries are removed.

• Be sure to replace both batteries at the same time, and do not use an old battery with a new one.

1. Remove the screw that hold the battery compartment cover in

place.

2. Remove the battery compartment cover by sliding it in the

direction indicated by the arrow in the illustation.

3. Slide the main battery holder in the direction indicated by the

arrow.

4. Remove both old batteries and replace with two new ones.

• Use two new batteries. Wipe the surfaces of the batteries with a soft, dry cloth. Make sure that the positive (+) sides of the batteries are facing up (so you can view the positive sides as the batteries lie in the battery compartment).

5. Replace the battery holder.

6. Replace the battery compartment cover and fasten it in place using the screw.

B) To replace the back-up battery

Before replacing the back-up battery, note the following precautions:

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

• Be sure to replace the back-up battery at least once a year.

1. Remove the screw that hold the battery compartment cover in place.

2. Remove the battery compartment cover by sliding it in the direction indicated by the arrow in the illustration.

3. First , remove this sticker from the back-up battery holder.

4. After removing this sticker, take the screw off that secures the back-up battery holder in place, and then remove the battery holder.

5. Remove the old battery and replace it with a new one.

• Wipe the surfaces of the battery with a soft, dry cloth.

Make sure that the positive (+) side of the battery is facing up (so

you can view the positive side as the battery lies in the battery compartment.)

6. Replace the back-up battery holder and fasten it in place using the screw, and replace the sticker over the battery holder.

7. Replace the battery compartment cover and fasten it in place using the screw.

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4. ERROR MESSAGE

Message Meaning Action

DATA ITEM NOT Text specified for Correct or change FOUND! search does not exist. specified text.

PASSWORD Wrong password Enter correct MISMATCH! entered. password.

MEMORY FULL! No more room in Delete unnecessary

DATA ERROR! Abnormal data caused Consult the "DATA CONSULT YOUR by strong impact, static ERROR" section on OWNER'S MANUAL electricity, etc. page 3 of owner's UNDER "DATA manual. ERROR"

memory for storage of data items from

data. memory.

5. TO RESET THE DIGITAL DIARY

Before describing the RESET operation, a note of WARNING —

all data stored in memory, including marked data items. Be sure to perform the RESET operation only if you wish to clear all data.

To reset the SF Unit's memory

1. Switch on power and press the RESET button with a thin, pointed object. The following message appears on the display.

DELETE ALL DATA ITEMS

STORED IN MEMORY ?

YES Y / NO N

* Important! Note that the following operation will clear everything stored in the unit's memory. To avoid accidental erasure of important data, be sure to perform this operation only while the system language is set to your native language. See page 2 of owner's manual for infomation on how to change the system language.

The following procedure will erase

2. Press Y to reset the SF Unit and clear everything from its memory. To abort the procedure without clearing anything, press N .

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Following the RESET operation, the Home Time Display appears. The initial settings of the SF Unit after reset are shown below.

HOME TIME: G.M.T.

JAN/1/1993 (FRI) 12:00 AM

12-hour format WORLD TIME: New York Daily Alarm: 12:00 PM Sound: Schedule alarm ON

Daily alarm OFF

Key ON Character input: CAPS System Language: English

6. TO SAVE THE DATA TO OTHER MACHINE

SF-8350 can transfer customers data to other SF-8350 with memory protection only when replacing the LCD or the outer case. How to transfer the data.

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

Important!

* You can not perform data communications with the CASIO SF-A series of SF Units (SF-A10,etc.). * Be sure to replace the connector covers on the SF units when you are not performing data communications.

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

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.

CAL

Operation: 1 9 0 1 2 3

CLEAR/AC

TIME TIME M+

DATE DATE

TIME DATE

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

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4) Check the hardware parameters, and if the units have another condition, reset as follows.

To change the hardware parameters, press the , , and cursol keys.

To set the hardware parameters, press the set

PARITY EVEN ODD NONE BIT LENGTH7 bits 7 bits 8 bits BPS 1200 2400 4800 9600

HARDWARE PARAMETERS

***

TEL

***

key.

TEL

FUNCTION

4 4

5) Set up the slave machine. 1 While in the Calender Display, Telephone Directory, Business Card Library, Memo Mode, or

Schedule Keeper, press the key followed by to select " DATA COMMUNICA-

FUNCTION

TION", and the following menu appears.

TEL

FUNCTION

1 SEND 2 RECEIVE 3 PRINT 4 HARDWARE PARAMETERS 5 DATA TO RAM CARD 6 PEN PRINTING

TEL

2 Press to select "RECEIVE" and the following display appears to indicate that the slave

machine is ready to receive data.

RECEIVE OK !

TO STOP, PRESS ESC

TEL

6) Set up the customer's machine. 1 While the transmitting unit is in the Calender Display, Telephome Directory, Business Card

Library, Memo Mode, or Schedule Keeper, press the key followed by to select

FUNCTION

"DATA COMMUNICATION", and the following menu appears.

TEL

FUNCTION

1 SEND 2 RECEIVE 3 PRINT 4 HARDWARE PARAMETERS 5 DATA TO RAM CARD 6 PEN PRINTING

TEL

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2 Press to select "TRANSMIT" and the following menu appears.

1 ONE DATA ITEM 2 MODE DATA ITEMS

3 ALL DATA ITEMS

TEL

— SEND —

3 Press to select "ALL DATA ITEMS", and the following display appears to confirm

whether you wish to proceed.

SEND ALL DATA ITEMS ?

YES SET / NO ESC

TEL

4 Press the key to proceed with the data transmission, or press if you wish to cancel.SET ESC

SET

NOW SENDING !

TO STOP, PRESS ESC

Data are transmitted in the sequence of Telephone Directory data, Business Card Library data, Memo data, Schedule Keeper data and Calendar data.

* If the customer's machine uses full memory, it takes about one minute and ten seconds for this

transferring.

* The following messages appear on the display of the receiving unit when a problem occurs during

data communications. All data transferred up to display of the message is retained in memory, but data communication is terminated.

If one of the following error messages appear, press the , , , ,

HOME TIME

, , , key, to clear the error message. Then, take corrective

WORLR TIME

CAL

CALENDAR

TEL

BUSINESS CARD

MEMO SCHEDULE

action and try data communication again.

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Message Cause

STOPPED ! • ESC key pressed on transmitting or receiving unit.

• Memory area of receiving unit full.

• Battery power drops below a certain level. TRANSMIT ERROR ! Cable connection broken or abnormal noise in cable. MEMORY FULL ! Memory area of receiving unit full.

7. TO CHECK THE MEMORY CAPACITY

The memory Capacity display tells you how much total memory is used for storage of Telephone Directory, Business Card Library, Memo, Calendar, and Schedule Keeper data. It also shows the percentage of total memory used, and how much total memory area remains. Press the key to check the current memory capacity.

CAPA

Following the memory reset operation, the display will appear as follows.

56006 0

When the percentage of memory used reaches 100%, you will not be able to enter any more data into memory.

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8. DISASSEMBLY (SF-8350)

1) To open display unit

1. Remove the key switch sheet from the display frame with care using a sharp tweezers and remove 2 screws, then remove the display back cover.

2. Remove the blind plate of hinge and then release the 2 screws of hinge cover.

3. Release the 5 screws of display PCB and remove the display PCB.

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9. BLOCK DIAGRAM

LCD 192 X 48 dots

CD401-TS

TO KEYBOARD

C0~C47

MSM6585AV

-Z-358B

DATA BUS

CPU

µPD3055GF002-2BA

ROM

(Character Generator)

HD62063B01

MSM6585AV

-Z-358B

S112~S191S32~S111S0~S31

LCD DRIVER LCD DRIVER LCD DRIVER

MSM6585AV

-Z-358B

OPEN (OFF)

LOCK (ON)

MAINSWITCH

LCDDRIVE VOLTAGES

V1 ~ V4, VREG

POWER SUPPLY

CHIP FOR LCD

SC371015FU

VDD

GND

CARD LOCK SWITCH

FREE (OFF)

LOCK (ON)

ROM

(Operation Program)

µPD23C4001EBGW-301

NOTE

RAM

HM62L864LFP-12MRL

RAM

µPD43256AGX-

10/12/15LL

NOTE: There are two types of the RAM chips:

1. Using 1pc. of HM62L864LFP-12MRL

2. Using 2pcs. of

µPD43256AGU-10/12LL

X 2 PCS.

Power supply circuit

GATE ARRAY

µPD65005G-452-22

TX, RX

INTERFACE FOR DATA TRANSMISSION

& DATA RECEPTION

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10. CIRCUIT EXPLANATIONS

10-1. System chart

Generally, SF-8350 is working with the following steps.

VREG,V1~V4 Output for LCD drive

VDD

Power supply chip

GND

(Pin69)

VDD

GND

KAC

(Pin54)

"L"

(Pin31)

PDB

SC371015FU

VDD1

VDD2

(Pin32) (Pin20)

INIT1

µPD3055GF002-2BA

KIO

(Pin53)

"H"

VO1

"H"

V2ON

CPU

(Pin3)

(Pin2)

(Pin41)

Batteries CR-2032 X 2 pcs.

2 MHz

VDD

OSCOOSCI

(Pin40)(Pin45)

INT0

(Pin70)

MAIN SWITCH

(Pin36)

"L"

(Pin30)

(Pin29)

OFF

ADDRESS BUS

ADDRESS

"H"

Gate array

µPD65005G-452-22

VIN

LSO

(Pin25) (Pin40)

VDD

"L"

VDD

(Pin39)(Pin30)

(Pin17)

GNDVDDVOT

MON

SWO

VOB

(Pin35)

313

"L""H"

(Operation program)

µPD23C4001EBGW-301

(Pin22)

LSI

"L"

(Pin24)

(Pin2)

(Pin3)

ROM

Open

Transistor Q1

"H"

GND

VCC

VDD

(Pin1)

1. Supply 6V to VDD1 and VDD2.

2. Output VDD (4.5V).

3. Output "L" from SWO terminal.

4. Output "H" from LSO terminal.

5. Main switch ON.

6. Input "L" to SW terminal.

7. Output "L" from KAC terminal.

8. Push power on button switch.

DATA BUS

— 15 —

DATA

9. CPU oscillation is generated.

10. Output "H" from V2ON terminal.

11. Output "H" from VOT terminal.

12. Output all LCD drive voltages.

13. Output "L" from VOB terminal.

14. Apply VDD to ROM.

15. CPU sends ROM chip enable signal from EO terminal.

16. CPU sends address to ROM.

17. CPU receives data from ROM.

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10-2.Power supply circuit

1) Power supply chip SC371015FU

C8 C7

GND1

VREG

VO1

VDD1

VDD2

GND2

6 7

2 1 19

V COMP1 V COMP2

Memory battery

R10

FROM GATE ARRAY

VOT terminal

18 20

POWER SUPPLY CHIP

SC371015FU

PDB

VDD

(4.3 V ~ 4.7 V)

CR2032CR2032 CR2032

Main batteries

The IC SC371015FU is power supply chip for SF-

8350. When IC SC371015FU receives a Voltage

6V (CR-2032 × 2 pcs.) at the terminal VDD1(Pin No.2), the regulated voltage VDD (4.3~4.7V) will be applied to the VDD lines. The outputs Vss (VREG) and V1~V4 are the LCD drive voltages. When the terminal PDB becomes "H", those voltages are generated by IC SC371015FU and capacitors C7 and C8 (ESCT1AY335R) and applied to LCD driver IC MSM6385AV-Z-358B. The resistors R8~R10 are used for dividing voltage V1~V4.

LCD DRIVE VOLTAGE Value (Approx.) [V]

Contrust : Min. Contrust : Max.

VSS(VREG) -3.5 -6.4

V1 +3.4 +3.1 V2 +2.5 +1.7 V3 -1.5 -3.6 V4 -2.5 -4.9

The V comp1 and V comp2 outputs are the battery voltage detection outputs. According to VDD1 and VDD2 voltages, V comp1 and V comp2 will change the status as follows:

OUTPUTS STATUS " H " STATUS " L "

V COMP 1

V COMP 2

When the batteries voltage When the batteries voltage is more than 4.7 V. is less than 4.6 V.

When the batteries voltage When the batteries voltage is more than 4.5 V. is less than 4.4 V.

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2) Gate array

GND

TO MAIN SWITCH

" L "

" H "

TO CPU INT0 terminal

(Pin 70)

(Pin 40)

(Pin 25)

SWO

LSO

(Pin 39) (Pin 17)

LSI MON

GATE ARRAY

µPD65005G-452-22

GNDVDD

3) Main switch and power on switch

Open

(Pin 23)(Pin 24)

CSB

(Pin 22)

" H " FROM CPU CS2 terminal

When VDD is applied from power supply IC SC371015FU to gate array uPD65005G-45222, gate array will send "L" signal to active the main switch signal from terminal SWO. Also, gate array will send "H" signal to release the INT0 terminal of CPU from LSO terminal. The terminal CSB is for the chip select of gate array. This signal is sent from CPU terminal CS2. And when the VDD is applied to CPU, CPU will send "H" signal to CSB terminal.

(Pin 28)

VDD

µPD3055GF002-2BA

KAC

(Pin54)

"L"

POWER ON SWITCH

CPU

KIO

(Pin53)

"H"

(Pin36)

MAIN SWITCH

"L"

OFF ON

(Pin40)

"L"

GATE ARRAY

SWO

µPD65005G-452-22

When the main switch is set to on position, SW terminal of CPU becomes "L", then CPU will send "L" signal to KAC terminal to enable the system power on. The KI0 terminal is "H" when VDD is applied to CPU. Therefore, when pressing the power on switch, CPU will generate a clock pulse (2 MHz) for start up the system.

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4) Power supply for LCD

(Pin69)

INT1

CPU

µPD3055GF002-2BA

V2ON

"H"

(Pin45)

(Pin29)

"H"

(Pin30) (Pin31)

VOT

VIN

GATE ARRAY

µPD65005G-452-22

POWER SUPPLY CHIP

SC371015FU

PDB

LCD drive voltages VREG,V1~V4

When the system is start up, CPU will send "H" signal to VIN terminal of gate array from V2ON terminal. Then, gate array will send "H" signal from VOT terminal to release interruption signal INT1 of CPU and also, it will be sent to PDB terminal of power supply chip to generate LCD drive voltages.

5) ROM driving transistor

VDD

(Pin1)

(Pin35)

" L "

VOB

GATE ARRAY

µPD65005G-452-22

(Pin2)

Transistor Q1

(Pin3)

VDD

VCC

ROM

µPD23C4001

EBGW-301

DATA

ADDRESS

(Pin30)

CPU

µPD3055GF002-2BA

After gate array send VOT signal, gate array send "L" signal from VOB terminal to base terminal of transistor Q1. Then, the VDD is applied to ROM (operation program), CPU can read a ROM program data by E0 signal.

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10-3.Battery voltage detection

(Pin32)

(Pin22)

(Pin1)

CR-2032 X 2

Main batteries

GND1 GND2

Power Supply Chip SC371015FU

VDD1

VDD2

(Pin19)

VCOMP2

VCOMP1

(Pin7)

(Pin6)

(Pin79)

(Pin37)

(Pin27)

ONMK

µPD3055GF002-2BA

BLI

µPD65005G-452-22

C P U

Gate Array

The power supply IC chip SC371015FU has two kind voltage detection circuit in it. According to the batteries input voltage, the detection outputs V comp1 and V comp2 will change the status as follow:

VCOMP2

Batteries Voltage

VCOMP2

More than about 4.6V

Less than about 4.6V

"H"

"L"

VCOMP1

Batteries Voltage

More than about 4.4V

Less than about 4.4V

VCOMP1

"H"

"L"

When CPU receive VCOMP2 detection signal, the machine shows "MAIN POWER SUPPLY BATTERIES GETTING WEAK! REPLACE!" on the display. And when the batteries voltage is weak more (approx. 4.53V), as the VCOMP1 detection signal becomes "L". The machine will operate an auto power off operation.

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10-4.CPU pin description (µPD3055GF002-2BA)

Pin No. Name In/Out Status Status Description

of OFF of ON 1~14,16,17 A0~A15 Out L Pulse Address Bus line 15,39,100 VSS In GND GND GND terminal 24 WE Out H Pulse Write signal 25 OE Out H Pulse Read signal 26 FE Out H Pulse Not used 27 CS1 Out H H Not used 28 CS2 Out H H Chip select signal for gate array 29 CS3 Out H Pulse Chip select signal for ROM (Chargacter generator) 30 E0 Out L Pulse Chip enable signal for ROM (Operation program) 31 E1 Out L H Chip enable signal 32 E2 Out L H Chip enable signal 33 E3 Out L H Chip enable signal 34 BCON Out H H BCN signal to gate array 35 MDP2 Out H L MDP signal to gate array 36 SW In L L Switch signal (When switches are at ON position.) 37 ONMK In H H Battery detection V comp1 input 38 TEST In L L TEST terminal (connect to GND) 40,41 OSC O/I In L Pulse Clock input 42 VOSC In L H Power input for Clock 43,91 VDD1 In H H VDD input terminal 44 VDD2 In H H VDD input terminal 45 V2ON Out L H Power on output signal 46~53 KI7~KI0 In H H Key input signal 54 KAC Out L Pulse Power on switch signal output 55~65,67 KC0~KC11 Out H Pulse Key common signal output 66 GND In L L GND terminal 68 INT2 In H H Interrupt signal from ROM (Character generator) 69 INT1 In L H Interrupt signal from gate array 70 INT0 In H H Interrupt signal from gate array 71 BRK In H H VDD input terminal 72 P0 Out H H Transmission data output 73 P1 In L H Reception data input 74 P2 In H H Card lock switch input 75 P3 In L H IC card detection signal input 76 P4 Out H Pulse KC12 key common signal output 77 P5 Out H Pulse KC13 Key common signal output 78 P6 In H H Memory back-up battery detection input 79 P7 In H H Battery detection V comp2 input 80 H1 Out H H Display contrast control signal output (Up/Down) 81 WENL In L L GND terminal 82 H2 Out H H Not used 83 L1 Out L H Chip enable signal for gate array 84 L2 Out L L Display contrast control clock signal 85 DT Out H Pulse Not used 86 PRO Out L H LCD driver mode selection signal 87 FR Out L Pulse LCD driver synchronous signal 88 LP Out H Pulse LCD driver latch pulse signal 89 GC Out H Pulse Not used 90 DE Out H Pulse LCD driver data latch clock signal 92~99 IO7~IO0 In/Out L Pulse Data bus line

(KI7---Not used)

18~23 RA14~19 Out L Pulse Address line (Used only RA15,16)

(Character generator)

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10-5.Gate array pin descriptions (µPD65005G-452-22)

Pin No. Name In/Out Status Status Description

of OFF of ON 1~8 OI7~OI0 In/Out L L Data bus line for ICcard 9 A15 In L Pulse Address input 10,11 A01,A00 In L Pulse A1,A0 address input 12 CEB In L Pulse Decode signal for data access 13~16,18~21 IO0~IO7 In/Out L Pulse Data bus line 17 GND In L L GND terminal 22 CSB In H Pulse Chip select signal from CPU 23 MON Out L L Holding signal for LSI terminal (Card lock switch) 24 LSI In L L Card lock switch detection input 25 LSO Out H H Card lock switch detection output 26 PDN In H H Power down detection input 27 BLI In H H Battery detection V comp1 input 28 DEB Out H Pulse Chip selection signal for ROM(Character generator) 29 VIN In L H Power on signal input 30 VOT Out L H Power on signal output 31 OEI In H Pulse Read signal input 32 WEI In H Pulse Write signal input 33 BBC Out L Pulse Memory back-up battery scanning signal 34 CDE In L H IC card detection signal input 35 VOB Out H L ROM power switching signal (Operation program) 36 TXO Out H H Transmision data output 37 TXI In H H Reception data input 38 FOM In H H VDD terminal 39 VDD In H H VDD terminal 40 SWO Out L L Main switch control signal 41 BCN In H H BCON signal from CPU 42 MDP In H L MDP2 signal from CPU 43 OEO Out L Pulse Read signal for IC card 44 WEO Out L Pulse Write signal for IC card

Not used

Connected to GND

card

(Not used) (Not used)

10-6.Power supply chip IC pin descriptions (SC371015FU)

Pin No. Name In/Out Status Status Description

32,22 GND1,2 In L L GND terminal 1,19 VDD1,2 In H H Main battery positive terminal (+6V) 2 VO1 Out H H VDD output terminal (4.5V) 31 PDB In L H Power on switch signal from gate array 6 V COMP1 Out H H Battery detection signal (less than 4.6V---"L") 7 V COMP2 Out H H Battery detection signal (less than 4.4V---"L") 8 VSS Out L *-5V LCD drive power V REG 9 V1 Out L *3.25V LCD drive power V1 10 V2 Out L *1.95V LCD drive power V2 11 V3 Out L *-2.5V LCD drive power V3 12 V4 Out L *-3.75V LCD drive power V4 13~16 VD/V1~4 ** H ** Voltage drividing terminal for LCD drive power 17 C1N ** GND -5V Negative terminal for doubler capacitor C7 18 C2P ** 3V GND Positive terminal for doubler capacitor C8 20 C1P ** 3V -2.2V Positive terminal for doubler capacitor C7 21 C2N ** GND -2.2V Negative terminal for doubler capacitor C8 23 SUB CONT In L **

of OFF of ON

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Pin No. Name In/Out Status Status Description

of OFF of ON

24 EROUT Out 6V 5V VFB capacitor terminal 25 VFB ** H 3.2V EROUT signal input 26 MIN ** 5V 3.2V 27 MAX ** 5V 3.2V 28 U/D In H 5V Display contrast control signal (Up/Down) 29 CLOCK In L L Display contrast clock signal 30 SET In H H Display contrast data reset signal 31 PDB In L H

10-7.Character generator ROM pin descriptions (HD62063B01)

Pin No. Name In/Out Status Status Description

of OFF of ON 1,7~12,23 NC ** ** ** Not used 2 BLD In ** ** Not used (Battery voltage detection terminal) 3 VOSC In 3V ** Connected capacitor 4,20 GND In L L GND terminal 5,6 OSI/OSO In Pulse Pulse External clock terminal (32.768 KHz) 13 TNL Out ** ** Not used 14,19 IN1+,IN2+ In H H Connected to VDD 15,32 VSS1,VSS2 In L L GND terminal 16,21 IN1-,IN2- In H H Connected to VDD 17,22 OUT1,OUT2 Out ** ** Not used 18 TNH Out ** ** Not used 24 IN In L Pulse Power on key input terminal 25 OUT Out H Pulse KI0 terminal for power on 26,27 BZ1,2 Out L L Buzzer signal 28 INT Out H H Interrupt signal for alarm clock (alarm time----"L") 29,30 CEH,CEL Out H Pulse RAM chip select signal 31 CED In H Pulse Chip enable signal of CPU 33 EN In L H Enable signal (Buzzer off-----"L") 34~37 IO3~IO0 In/Out L Pulse Data bus line (IO0~IO3) 38~42 A0~A3,A15 In L Pulse Address bus line (A0~A3,A15) 43 WEB In H Pulse Write signal 44 CSB In H Pulse Chip select signal

Power

L L

H H

L L 3V H

VDD terminal

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Page 24

10-8. Operation program ROM pin discriptions (µPD23C4001EBGW-301)

Pin No. Name In/Out Status Status Description

1,30,31 NC - L +5V Connected to VCC 2~12, 23, A0~A16 In L Pulse Address bus line (A0~A14,RA15,RA16) 25~29 13~15, 17~21 IO0~IO7 Out L Pulse Data bus line (IO0~IO7) 16 GND Power GND GND GND terminal 22 CE In L Pulse Chip selection terminal 24 OE In L Pulse Output enable terminal 32 VCC Power L +5V VCC terminal

10-9. RAM pin descriptions (

Pin No. Name In/Out Status Status Description

2, 4~6, 9~13, A0~A14 In L Pulse Address bus line (A0~A14) 15~18 21~23, 25~29 D1~D8 In/Out L Pulse Data bus line (IO0~IO7) 24 GND In L L GND terminal 31 CSB In H Pulse Chip select signal 1 OEB In H Pulse Read signal from CPU 7 WEB In H Pulse Write signal from CPU 8 VCC In H H VDD terminal

of OFF of ON

µPD43256AGU-10/12/15LL)

of OFF of ON

10-10. RAM pin discriptions (HM62L864LFP-12MRL)

Pin No. Name In/Out Status Status Description

1 NC - - - No connection 2~12, 23, A0~A16 In L Pulse Address bus line (A0~A15) 25~28,31 13~15, 17~21 IO0~IO7 Out L Pulse Data bus line (IO0~IO7) 16 VSS Power GND GND GND terminal 22 CS1 In H Pulse Chip selection terminal 1 24 OEB In H Pulse Output enable terminal 29 WEB In H Pulse Write enable terminal 30 CS2 In H H Chip selection terminal 2 32 VDD Power +5V +5V VDD terminal

of OFF of ON

— 23 —

Page 25

11. DIAGNOSTIC OPERATION

Main switch

SELECT MENU 1 DISPLAY

2 MEMORY

3 KEY

4 BUZZER

5 I/F

Check pad

1. Diagnostic mode The diagnostic mode appears when main switch is turned on

while there is a short in the checkpad. After this operation, the machine will beep and display "SELF-TEST".

The menu appears after press SET key. Tests are conducted by selecting the mode from the list on screen. The each test can be selected by the following function keys.

DISPLAY 1 WHITE

2 BLACK

3 CHECKER

4 REVERSE

5 FRAME

TEL key : Test the LCD display Business card key : Test the IC memory chip and the RTC MEMO key : Test all keys SCHEDULE key : Buzzer test CALENDAR key : SB-60/SB-62cable interface

2. Display check DISP CHNG key : Return to menu display

TEL key : Lights on dot at corners Business card key : Lights on in all dots(black screen) MEMO key : Checker display SCHEDULE key : Reverse checker display CALENDAR key : Lights on dot along the screen edge (frame)

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3. ROM/RAM check DISP CHNG key :Return to menu

MEMORY 1 WRITE

2 READ 3 DUMP 4 CHKSUM

INT #1 5 RTC

TEL key :Write the set pattern to the selected RAM

area

Business card key :Compare the pattern displayed after # with

the write data of RAM and displays the results.

MEMO key :Dump contents of memory. (direction

depens on setting of internal/extarnal switch)

INT---Internal RAM EXT--External RAM(RAM card)

#1---Test data pattern(00,01,02...)

#2---Test data pattern(FF,FE,FD....)

SCHEDULE key :Call up checksum and XOR values for

connected ROM/RAM data.

CALENDAR key :Bring up clock display. The present time,

data and daily alarm can be set.

NOTE 1. To change the RAM internal or extenal, press WORLD TIME key. As SF-8350 has no RAM

card interface, Test only Internal RAM area.

NOTE 2. To change the test data pattern,

press HOME TIME key for data pattern 1 (00,01,02,03,......FF,00,01,02,03,......).

press WORLD TIME key for data pattern 2 (FF,FE,FD,......00,FF,FE,FD,...........).

1) RAM write

The following message will be displayed while writing the data to RAM.

EXECUTING !

2) RAM read

Normal end display is;

COMPLETE !

64KB

When there is no RAM to write a data, the following message will be displayed.

NO RAM

To release this message, press DISP CHNG key.

Error end display is;

DATA ERROR !

ADDRESS CORR RAM

XXXX XX XX

To release this message, press DISP CHNG key.

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Page 27

3) Memory dump

When memory dump is operated by pressing MEMO

MEMORY DUMP

XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX

button, a display will appear as shown at left. The first two lines, begining from the top left, signify the following address values in reference to the one megabyte "E0" area:

00001,00002,00004,....,00080,00100,00200

00400,00800,01000,....,20000,40000,80000

The lower two lines refer to the data in the "E1" area. Note: The Internal/External switch is activated

4) CHECK SUM 5) RTC

pressing CAL button. SF8350 has no external RAM area.

TYPE SIZE CHECK-SUM XOR

E0 ROM 128KB 1169 4F CE RAM 64KB 8300 00

Type : ROM and RAM are shown.

Size : Memory capacity (total) Checksum: XOR : Logic operation for all data.

The ON key is the only key that remains functional when an error has occurred or check-sum is being displayed.

4. Key check

However, if the ROM is not in standard Casio format, a format error will be displayed.

KEY

1 RANDOM 2 AUTO

TIME DISPLAY

yyyymmddhhmmss........

..............

1990 04 04 12 34 56

Input can be made in the second and third lines using the numeric keys. Entry of 12 or more digits sets the time and date. Entry of 4 or 6 digits sets the daily alarm. The ON key clears current entries.

TEL Key :

The 'key code' will be displayed. The 'key code' is numbered incrementally from left to right with the DISPLAY CHANGE key as "00", and TEL key as "01" etc. Accordingly, the SET keys is "81". To release this test, press SEARCH key.

Business card key :

Limits the mode mentioned above so that the keys must be pressed in order according to the key code. If an error is made a buzzer sounds for about 1 second. (A correct entry results in a beep tone)

In either mode a press of the SEARCH key will return the screen to the menu mode.

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Page 28

5. Buzzer check

BUZZER 1 BEEP

2 ALARM 1 3 ALARM 2

EXECUTING !

6. SB-60/SB-62 cable interface check

I/F 1 TRANSMIT

2 RECEIVE 3 LOOP 4 ASCII

7N9

TEL key : Key input sound every 1 second Business card key : Sound alarm 1 MEMO key : Sound alarm 2

Sound can be stopped by pressing the any key. While an alarm is sounding the screen display is as shown at left. If an irregularity is found in voltage of battery while the alarm is sounding, the alarm will stop. After 256 seconds, the alarm will stop automatically.

The TEL to SCHEDULE keys are used to select mode; the CALENDAR, HOME TIME and WORLD TIME key are used to set the transmission paraments. The three charactors that appear on the right side at display represent the parameter. In the case of the exampledisplay, it indicates 7 BIT, NON PARITY, 9600 BPS. The operation continues until stopped by pressing the ESC key and then pressing the ON key for all modes.

DISP CHNG key : Return to menu mode

Parameter

TEL key : Transmission mode. The data of transmission

is "H"and it is sent out by the data of &H34 and &H38 by the Xon/Xoff control.

Business card key : Reception mode. Make sure to set the

parameter to match that of the transitting side.

EXECUTING !

MEMO key : Loop back test. Short the Tx and Rx terminals

The data received appears on the display. for this test. Transmit and check from &H20 to

&H7E. When complete, the message 'CHECK COMPLETE' is displayed.

SCHEDULE key : output the following ASCII code by Xon/

Xoff control.

!"#*+,-/0123456789: ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz

A line end code is added with each line.

CALENDAR key : Switch the data length 7 bit(7) or 8 bit(8) HOME TIME key : Switch the parity bit : NON(N)—EVEN(E) —NON(N) —ODD(O) WORLD TIME key : Switch the transmission speed : 9600(9)—4800(4)—2400(2)—1200(1)

To communicate two machines, please set the transmission machine before setting the receiving unit. To release communication, press ESC button. In this case, the break code is sent to receive units. Therefore, both machines display "TRNS BREAK !" and communication will be stopped. Also, if the error is occurred, both machines display "TRNS ERROR !" and communication will be sttoped.

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Page 29

NOTE : As diagnostic program area does not have all ASCII code, to display a reception data, some

charactor will be changed to other charactor. For example, a chapital letter will be changed to small letter.

Break display (Broken transmission)

TRNS BREAK !

7. Btattery level check Memory back up battery

LOW BATTERY!

BACK UP

Main battery

LOW BATTERY!

Error display

TRNS ERROR !

The memory back up voltage detector detects any irregularity in voltage, the machine goes into an error state and the display is as shown at left figure. To release this display, press any key.

When the main battery voltage detector detects low battery condition while display is on, the machine shows the message as shown at left figure. When this message is displayed, only ON/OFF key are possible to operate. And if the voltage becomes lower than 4.4V, the display will be off mode (auto power off mode).

8. Others

1) When power is off after presetting a alarm time, automatically power is on at a alarm time. However, the display is not reserved in this case.

2) When executing memory sum check, before execute the RAM write check (with TEL button).

3) To release diagnostic mode, press reset button.

4) The display contrast can be changed by the contrast volume.

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Page 30

12. TROUBLESHOOTING

Generally, check the machine with the followning steps for repair.

Main battries 6V?

START

Yes

Save data to P/C if necessary.

Follow repair section 2.

Follow repair section 3.

CONDITION :

Replace main battries (CR2032 2pcs.)

(Clean and adjust battery contact.)

Key input OK?

Yes

Display OK?

Yes

Current consumption OK?

Yes

Load data from P/C if necessary.

Data OK?

Yes

END

Main battery switch ON

Reset operation

Yes

Key input OK?

Follow repair section 1.

Repair section 1 : For no key input problem

START

Pin 2 of SC371015FU Approx. 4.5 V ?

Yes

Pin 24 of µPD65005G-452-22 "L"?

Yes

Pin 40 of µPD65005G-452-22 "L" ?

Yes

Pin 36 of µPD3055GF002-2BA "L" ?

Yes

Pin 54 of µPD3055GF002-2BA "L" ?

Yes

Poor connection?

Poor connection? Solder line

Poor connection?

Yes

Replace parts.

Yes

Replace parts.

Yes

Replace parts.

Yes

Replace parts.

Yes

Replace parts.

Solder line

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Page 31

Connection of keyboard cable OK?

Yes

When press power on Key, any oscillation at oscillator?

Yes

Pin 45 ofµPD3055GF002-2BA "H" ?

Yes

Pin 29 of µPD65005G-452-22 "H" ?

Yes

Pin 30 of µPD65005G-452-22 "H" ?

Yes

Pin 31 of SC371015FU "H" ?

Yes

Adjust keyboard cable.

Poor connection on oscillator?

Poor connection? Solder line

Poor connection?

Poor connection? Solder line

Yes

Replace parts.

Yes

Replace parts.

Yes

Replace parts.

Solder line

Pin 35 of µPD65005G-452-22 "L" ?

Yes

Pin 3 of transistor Q1 "H" ?

Yes

Pin 32 of ROM µPD23C4001EGBW-301 "+4.5V" ? Solder line

Yes

Pin 22 of ROM µPD23C4001EGBW301 "Pulse" ?

Poor connection on ROM, RAM or CPU ?

Yes

Poor connection?

Poor connection? Solder line

Poor connection on ROM or CPU?

Replace ROM, RAM or CPU.

Yes

Replace parts.

Yes

Replace parts.

Yes

Replace CPU.

Solder line

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Page 32

Repair section 2 : For no display or wrong display problem

START

Pin 30 of µPD65005G-452-22 "H" ?

Yes

Pin 31 of SC371015FU "H"?

Yes

Poor connection? Solder line

Yes

Replace parts.

Solder line

1 1

Yes

Poor connection?

Poor connection on chip resistors R8~R10 ?

Poor connection on chip capacitor C7~C8 ?

Chip capacitor OK ?

Yes

Chip resistor OK?

Yes

Replace SC371015FU.

Yes

LCD drive voltages OK?

(Pin8~12)

Poor connection or cut of heat seal cable ?

Poor connection on LCD driver ?

Poor connection or cut of heat seal cable for LCD ? Replace heat seal.

Yes

Replace heat seal.

Solder line

Replace parts.

Solder line

LCD cracked ?

Yes

Repair section 3 : For memory problem

START

Poor connection on RAM chips ?

Poor connection on CPU ?

Replace RAM chips or CPU.

Yes

— 31 —

Replace LCD.

Repleace Display PCB ass'y.

Solder line

Page 33

13. PARTS LIST (SF-8350)

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Page 34

— 33 —

Page 35

14. PCB VIEW (SF-8350)

— 34 —

Page 36

15. ASSEMBLY VIEW (SF-8350)

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Page 37

8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926