Casio SF-6300 Troubleshooting guide

R
SF-6300(LX-559)
DEC. 1994
SF-6300
(with price)

CONTENTS
SPECIFICATIONS ..................................................................................................................... 1
SAVING DATA .......................................................................................................................... 4
LSI PIN FUNCTIONS................................................................................................................. 8
TROUBLESHOOTING............................................................................................................. 11
DIAGNOSTICS ........................................................................................................................ 12
SCHEMATIC DIAGRAM.......................................................................................................... 19
ASSEMBLY VIEW ...................................................................................................................22
PARTS LIST ............................................................................................................................ 23

— 1—
Power Switch Maximum [µA]
OFF 11.0
ON 510
SPECIFICATIONS
Display element: 16-column ×4-line LCD
Memory capacity: 64 kB (60972 bytes)
Main component: LSI
Power supply: 2 lithium batteries (CR2025)
Power consumption: 0.05 W
Battery life*:
Approximately 300 hours continuous operation in Telephone Directory
Approximately 250 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: 4.65 x 122 x 146 mm (3/6x 4 13/16 x 5 3/4inches)
Folded: 8.9 x 122 x 75 mm (3/8x 4 13/16 x 2 15/16 inches)
Weight: 91 g (3.2 oz)
Current consumption:
* The batteries that come installed in this unit when you purchase it are for factory test purposes, so
they will probably not provide normal service life.

— 2—
To replace the batteries
1. Loosen the screws on the back of the SF Unit that hold the battery
compartment cover in place, and remove the cover.
• Lift up the edge of the back cover that was fastened down by the
screws, hinging on the opposite edge.
2. Slide the battery switch to the "Replacement" setting.
3. Remove the battery holder by sliding it in the direction indicated by
the arrow in the illustration.
Caution
Be sure to remove only one battery at a time. Otherwise, you will
lose all data stored in memory.
4. 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).
5. Replace the battery holder and fasten it in place.
6. Repeat steps 2 through 5 for the other battery.
• Be sure to replace both batteries. Never mix old batteries with new
ones, and be sure to use CR2025 lithium batteries only.
7. Slide the battery switch to the "Operational" setting.
8. Replace the back cover of the SF Unit and fasten it in place using
three screws.
• Be careful that you do not over tighten the screws.

— 3—
Resetting the SF Unit's Memory
Warning!
The following procedure erases all data stored in the memory of the SF Unit. Perform the following operation
only when you want to delete all data and initialize the settings of the SF Unit.
Remember - you should always keep copies of important data by writing it down, by transferring it to a personal
computer or other SF Unit.
To reset the SF Unit's memory
1. Check to make sure that the power is off.
2. Remove the three screws that hold the back cover in place, and then remove the back cover.
• Lift up the edge of the back cover that was fastened down by the screws, hinging on the opposite edge.
3. Switch on power and press the RESET button with a thin, pointed object. The following message appears
on the display.
4. Press Y* to reset the memory and delete all data or N to abort the reset operation without deleting anything.
* Note that the letter key you press to indicate "yes" depends on the system language, as noted below.
English: Y Spanish: S German: J
French: O Italian: S
5. Replace the back cover and fasten it in place with three screws.
• Be careful that you do not over tighten the screws.
Following the reset operation described above, the Home Time display appears and the SF Unit 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)
Daily Alarm: 12:00 PM
Language: English
Sound: Schedule alarm ON
Reminder alarm ON
Daily alarm OFF
Key ON
Character input: CAPS
ALL DATA
CLEAR!
OK? Y/N
CAPS
RESET Button

— 4—
SAVING DATA
The SF-6300 can transfer the customer's data (both the open and secret areas) to another SF-6300.
• Turn off both the transmitting and receiving units and connect them using the SB-60/62 cable.
1Setting 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:
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.
ON CAL
M SUN
1901/ 2/ 3
SB-60/62
1TIME
DATE 2TIME
DATE 3TIME DATE M+

— 5—
3. Press TEL , and FUNC twice.
4. Press 4 to select DATA COMM.
5. Press 2 to select RECEIVE.
*If the password isn't
registered in the SF-6300,
the display shows X instead
of "1."
1 SEND
2 RECEIVE
3 SET UP PAR.
DATA
RECEIVE OK
TO STOP
PRESS (ESC)
1* TO SECRET AREA
2 ALL DELETE
3 LABEL EDIT
4 DATA COMM.
CAPS
CAPS
CAPS

— 6—
2Setting up the transmitting unit:
Set the hardware parameters as follows:
Parity: None Bit length: 7 BPS: 9600
1. Press , .
2. Press twice.
3. Press to select DATA COMM.
4. Press to select SET UP.
5. Use , , , or to select "N," "7," and "9600" and press SET .
*If the password isn't
registered in the SF-6300,
the display shows Xinstead
of "1."
FUNC
1* TO SECRET AREA
2 ALL DELETE
3 LABEL EDIT
4 DATA COMM
1 SEND
2 RECEIVE
3 SET UP PAR.
✻✻ SET UP PAR. ✻✻✻
PARITY E O N
BIT LENGTH 78
BPS 4800 9600
1 SEND
2 RECEIVE
3 SET UP
ON TEL
4
3
CAPS
CAPS
CAPS
CAPS

— 7—
6. Press 1 to select SEND.
7. Press 3 to select ALL DATA.
8. Press SET to start data transmission or ESC to abort the operation without sending
anything.
• If an error occurs during data transmission, the message “TRANSMIT ERROR!” appears on the display.
Press ESC to clear the error message.
9. After data transmission is complete, the display returns to the initial screen of the telephone mode.
1 ONE ITEM
2 MODE DATA
3 ALL DATA- SEND -
SEND ALL DATA?
SET/ESC
DATA
SENDING
TO STOP
PRESS (ESC)
CAPS
CAPS
CAPS

— 8—
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
LSI PIN FUNCTIONS
CPU: LSI1
No.1

— 9—
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
OE–
A11
A9
A8
A13
WE–
VCC
A14
A12
A7
A6
A5
A4
A3
A10
CE–
IO8
IO7
IO6
IO5
IO4
GND
IO3
IO2
IO1
A0
A1
A2
CXK58257ATM
(LSI 2)
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)
S0 ~ 95 Out Segment signal for display
C5 ~ 32 Out Common signal for display
168,200 NC - Not used
RAM: LSI2 and LSI3 (CXK58257)
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)
172 ~199
75 ~ 171

— 10 —
VOLTAGE REGULATOR: REG1 (S-81253)
Output Voltage (VDD): 5.3 V ±5%
VOLTAGE DETECTOR: DET1 (RH5VL46CA)
1
GND 2 VCC 3
VDD
VDD
GND
VCC
V
REF
R A
R B
1
23
R I
+
–
1
OUT
1
2
3
VCC
OUT
GND
Input Voltage (VCC) Output Voltage (OUT)
VCC > 5.2 V 5.2 V
VCC < 5.2 V 0 V
2
VCC 3 GND

— 11 —
TROUBLESHOOTING
Before the following solutions will be done, save data if possible.
SYMTOM
No Power
No display at all or wrong
display
No key input at all
SOLUTION
Replace batteries
Resolder
Replace it
Replace it
Replace it
Replace it
Replace it
Resolder
Replace it
CAUSE
Battery shortage
Poor soldering of the power supply
circuit
Defective LSI-1 or LSI-2
Defective Capacitor C8, C12, C13, or
C14
Defective TAB LSI
Defective heat seal
Defective LCD
Poor soldering LSI-1 or LSI2
Defective LSI-1 or LSI-2

— 12 —
Notes: 1. Be sure to transfer data to another SF-6300 unit before entering
the diagnostic mode, because the data will be changed by entering
the diagnostic mode.
2. The check 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 "Replacement" position.
2. Slide it to "Operational" position while shorting the check pads.
3. Press .
SELF TEST PROG.
PRESS SEARCH
QUIT BY OFF
CASIO APR 1994
TEST 2 MEMORY
MENU 3 KEY
4 BUZZER
1 DISP 5 I/F
SEARCH
DIAGNOSTICS
Check Pads
Blind label

— 13 —
Display Check
Display check
To return to the
TEST MENU,
press .
Press 1 on the TEST MENU.
1
ESC
2
3
4
5
DISP 4 RVS.
1 WHITE 5 FRAME
2 BLACK 6 DOT4
3 CHECK. 7 TIME
Frame display
All dots displayed
Checker displayed
Reverse checker
display
No display
,ACC CAPS SHIFT SEARCH
Operation Display Note

— 14 —
Operation Display Note
Check to see if
timer is working.
7
Shows dots at
corners.
6
ESC
TIME DISPLAY
00:00:XX
TEST 2 MEMORY
MENU 3 KEY
4 BUZZER
1 DISP 5 EXT
RAM check
To return to the
TEST MENU,
press .
5: Not used
6: Not used
2 MEMORY 3 WR2
4 READ2
1 WR1 5 DUMP
2 READ1 6 CHKSUM
1
( or 3 ) WRITE1
( or WRITE2 )
ESC
Operation Display Note
Memory Check
The functions of the numbered items on the display include:
1. WR1 :Writes the test pattern in the ROM to the RAM area. (Test pattern: Incremental order 00,
01, and so on)
2. READ1 :Compares the test pattern with the write data (WRITE1) of the RAM and displays the
results.
3. WR2 :Writes the test pattern in the ROM to the RAM area. (Test pattern: Decremental order
FF, FE, and so on)
4. READ2 :Compares the test pattern with the write data (WRITE2) of the RAM and displays the
results.
5. DUMP :Dump the data stored in ROM.
6. CHKSUM:Calculate SUM and XOR of RAM connected and display them.

— 15 —
Operation Display Note
(After a few seconds) MEMORY 3 WR2
4 READ2
1 WR1 5 DUMP
2 READ1 6 CHKSUM
EXECUTING!!
2
( or 4 )
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.
(Value: Address).
07: 00001
B5: 00002
C7: 00004
0B: 00008
FF: 00010
D6: 00020
88: 00040
20: 00080
03: 00100
EB: 00200
83: 00400
47: 00800
F7: 01000
1B: 02000
81: 04000
86: 08000
82: 10000 (E.G.)
07 B5 C7 0B FF
D6 88 20 03 EB
83 47 F7 1B 81
86 82 (E.G.)
5
TY SZ SUM XOR
FE 0 128 E290 XX
C3 A 64 XXXX XX
6

— 16 —
Key Check
Each key has its own key code. The key codes are assigned incrementally from left to right on the keyboard.
(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-6300 beeps.
Operation Display Note
Press 3 on the TEST MENU. KEY 1 RANDOM
2 AUTO Key check
To return to the TEST
MENU, press ESC .
2No display
00 01 02 03 04 ...............
............... 56 57
Check that the key
number appears on
the display.
To return to the TEST
MENU, enter
SEARCH .
MC MR M– M+
AC , ... % 7 , ... ÷
4 , ... x 1 , ... –
0 , ... + ON OFF
EXPENSE , ... DISP CHNG
REMINDER , ... DEL
← ↑ ↓ → ESC , ... ( )
FUNCTION , ... SHIFT , ...
SHIFT CAPS , ... SET
TEST 2 MEMORY
MENU 3 KEY
4 BUZZER
1 DISP 5 EXT
SEARCH

— 17 —
Operation Display Note
Buzzer Check
BUZZER 1 BEEP
2 ALARM1
3 ALARM2
Buzzer check
To return to the
TEST MENU,
press .
Check the sound.
To return to the
BUZZER menu,
press any key.
Press 4 on the TEST MENU.
EXECUTING!!
ESC
1
( or 2 , 3 )
BUZZER 1 BEEP
2 ALARM1
3 ALARM2
TEST 2 MEMORY
MENU 3 KEY
4 BUZZER
1 DISP 5 EXT
ESC

— 18 —
SCHEMATIC DIAGRAM
Main PCB