Casio CFX-9800G Troubleshooting guide

R
CFX-9800G(LX-392AA)
MAR. 1995
(without price)
INDEX

CONTENTS
1. SCHEMATIC DIAGRAM
1-1. Main PCB ................................................................................................. 1
1-2. Power Supply and Key Block ................................................................ 2
2. SPECIFICATIONS .......................................................................................... 3
3. GENERAL GUIDE ........................................................................................... 4
3-1. Modes....................................................................................................... 4
3-2. About Display Colors ............................................................................. 5
3-3. Color Contrast Adjustment .................................................................... 5
3-4. About Low Battery Warning................................................................... 6
4. REPLACING BATTERIES............................................................................... 6
4-1. To Replace the Main Power Supply Batteries ...................................... 7
4-2. To Replace the Memory Back Up Battery............................................. 8
5. RESET OPERATION....................................................................................... 8
6. WELDING CONDITION FOR THE CERAMIC OSCILLATOR
(CSTC4.30MG-TC) ................................................ 10
7. ERROR MESSAGE ....................................................................................... 10
8. OPERATION CHECK .................................................................................... 12
9. COLOR ADJUSTMENT ON OPERATION CHECK ...................................... 14
10. DATA TRANSFER CHECK........................................................................... 16
11. DATA COMMUNICATIONS .......................................................................... 17
11-1. Connecting Two CFX-9800G Units.................................................... 17
11-2. Before Starting Data Communications ............................................. 17
11-3. Setting Communications Parameters ............................................... 18
11-4. Using ALL, Range, and Factor........................................................... 19
11-5. Data Communications Precautions .................................................. 20
12. PIN FUNCTION
12-1. CPU (HD62119A02) ............................................................................. 21
12-2. ROM (MB834000CPF-G-4EP) ............................................................. 22
12-3. RAM (256RAM/3V)............................................................................... 22
13. TROUBLESHOOTING................................................................................... 23
14. DISASSEMBLY AND EXPLODED VIEW ..................................................... 24
15. PARTS LIST ................................................................................................. .28

— 1 —
1. SCHEMATIC DIAGRAM
1-1. Main PCB
NOTES
1. The terminals with mark are the checking
points for the power supply.
2. The terminals with mark are the checking
points for the function.
3. LSI5 and C14 are not used.

— 2 —
1-2. Power Supply and Key Block

— 3 —
Current Consumption
TYP [µA] MAX [µA]
ON (MENU) 4610 5530
OFF 15
2. SPECIFICATIONS
Display system: Three colors (orange, blue, green); 16-character ×8-line liquid crystal
display;10-digit mantissaand 2-digitexponentforcalculations;displays
binary, octal, hexadecimal, sexagesimal values, fraction, complex
number
Power supply: Main: Two AAA-size batteries (LR03 (AM4) or R03 (UM-4))
Memory protection: One CR2032 lithium battery
Power consumption: 0.1W
Battery life*: Main: Approximately 120 hours (continuous display of initial screen.) with
battery type LR03 (AM4)
Approximately 80 hours (continuous display of initial screen.) with
battery type R03 (UM-4)
Approximately 2 years (power switch off) with LR03 (AM4)/R03
(UM-4)
Memory protection: Approximately 2 years
* The batteries that have been installed in this unit when user purchased
it had been used in the factory test, so it will be impossible to fully satisfy
this specifications when these batteries are used.
Auto power off: Power is automatically switched off approximately six minutes after last
operation except when drawing dynamic graphs.
Ambient temperature range: 0°C ~ 40°C (32°F ~ 104°F)
Dimensions: 17.4mm H ×95.5mm W ×182.5mm D (5/8" H ×33/4" W ×71/8" D)
Weight: 200g (7.1 oz) including batteries
Accessories: Hard case

— 4 —
3. GENERAL GUIDE
3-1. Modes
You can control the operations of the unit by entering the correct mode. To select the mode you
need, select the appropriate icon from the Main Menu. The Main Menu appears whenever you
press the
MENU
key.
The icon that is highlighted is the one that is currently selected. Use the cursor keys to move the
highlighting around the display to select the mode that you want. To enter the highlighted mode,
press the
EXE
key.
• In addition to using the cursor keys to select a mode's icon, you can also select a mode by input-
ting a number or letter. Input the number or letter in the lower right corner of the icon to select the
mode you want.
• Use only the procedures described above to enter a mode. If you use any other procedure, you
may end up in a mode that is different than the one you thought you selected.
The following explains the meaning of each icon in the Main Menu.
COMP Mode
Use this mode for arithmetic calculations and function calculations, for drawing graphs
and for executing programs.
BASE Mode
Use this mode for binary, octal, decimal, and hexadecimal calculations and conver-
sions. This mode is also used for logical operations.
SD Mode
Use this mode for single-variable statistical calculations (standard deviation), and for
drawing normal distribution and single-variable statistical graphs.
REG Mode
Use this mode for paired-variable statistical calculations (regression), and for drawing
paired-variable statistical graphs.
MAT Mode
Use this mode for matrix calculations.
GRAPH Mode
Use this mode to input functions and draw their graphs.
DYNA Mode
Use this mode to store graph functions and to draw graphs by changing the values for
variables in the functions.

— 5 —
TABLE Mode
Use this mode to store a function or recursion formula, to generate a solution table of
values produced when the values of variables in a function or recursion formula
change, and to draw graphs.
EQUA Mode
Use this mode to solve linear equations with two through six unknowns, quadratic
equations, and cubic equations.
PRGM Mode
Use this mode to store programs in the program area, to execute programs, and to
store and execute programs as file data.
LINK Mode
Use this mode to transfer program, function, matrix, and other memory data to another
unit.
OPTION Mode
Use this mode to adjust the color contrast of the display and to reset the calculator to
its initial settings.
3-2. About Display Colors
The calculator can display data in three colors: orange, blue, and green. The default color for graph
drawing and comment text accompanying a graph or program execution operation is blue, but you
can use the following procedure to change the color to orange or green if you want.
1. Display the Graph Color Menu.
SHIFT COLOR
F1 (Orn)..Orange graph and comment text
F2 (Grn)..Green graph and comment text
2. Press the function key that correspond to the color you want to specify for graph drawing and
comment text, and then input the text.
3. Execute the function or run the program to display the graph and comment text in the color you
specify.
3-3. Color Contrast Adjustment
Highlight the OPTION icon on the Main menu and then press
EXE
.
OPTION
TO SELECT: [ ↓][ ↑ ]
TO SET : [EXE]
COLOR CONTRAST
RESET
Orn Grn
F1 F2

— 6 —
✽✽ Low battery! ✽✽
3-4. About Low Battery Warning
If the following message appears on the display, immediately stop using the calculator and replace
batteries.
If you try to continue using the calculator, it will automatically switch power off, in order to protect
memory contents. You will not be able to switch power back on until you replace batteries.
Be sure to replace batteries at least once every two years, no matter how much you use the calcu-
lator during that time.
EXE
F1 (INIT). Returns tint to default setting.
F2 (IN·A). Returns tint and contrast to default setting.
• To adjust the contrast
1. Use and to move the pointer to CONTRAST.
2. Use to make the figures on the display darker or to make them lighter.
3. Press
MENU
to return to the Main Menu.
• To adjust the tint
1. Use and to move the pointer to the color you want to adjust (ORANGE, BLUE,
GREEN).
2. Use to move the setting toward the G (green) side or to move it to the O (orange) side.
3. Press
MENU
to return to the Main Menu.
• When adjusting the color contrast, first adjust overall display contrast, and then adjust the tint of
each individual color.
• You can also adjust the overall contrast whenever any other screen is shown on the display by
pressing
SHIFT
and then or . Press
SHIFT
again to exit the contrast adjustment procedure.
4.REPLACING BATTERIES
Warning!
If you remove both the main power supply and the memory back up batteries at the same time, all
memory contents will be erased.
COLOR
,,,
,,,
O B G
ORANGE
BLUE
GREEN
CONTRAST
INIT IN·A
– +
F1 F2

— 7 —
4-1. To Replace the Main Power Supply Batteries
* Never remove the main power supply and the memory back up batteries from the unit at the same
time.
* Be sure to switch the unit off before replacing batteries. Replacing batteries with power on will
cause data in memory to be deleted.
* Never replace the main power supply battery compartment cover or switch the calculator on while
the main power supply batteries are removed from the calculator or not loaded correctly. Doing so
can cause memory data to be deleted and malfunction of the calculator. If mishandling of batter-
ies causes such problems, correctly load batteries and then perform the RESET operation to
resume normal operation.
* Be sure to replace all two batteries with new ones.
1Switch the power of the calculator off, and slide the calcula-
tor into its hard case.
2Remove screw Aon the back of the calculator, and remove
the main battery compartment cover.
3Remove the two old batteries.
4Load a new set of two batteries, making sure that their
positive +and negative -ends are facing in the proper
directions.
5Insert the tabs of the main battery compartment cover into
the slots in the back of the calculator and replace the cover.
Secure it in place with the screw.
• Power will not switch on if you press
AC/
ON
while the main
power supply battery compartment cover is open.
6Remove the calculator from its hard case and press
AC/
ON
to
switch power on.
• Power supplied by memory back-up batteries while the
main power supply batteries are removed retains memory
contents.
• Do not leave the unit without main power supply batteries
loaded for long periods. Doing so can cause deletion of data
stored in memory.
Precautions:
Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the
unit. Note the following precautions:
• Be sure that the positive +and negative -poles of each battery are facing in the proper direc-
tions.
• Never mix batteries of different types.
• Never mix old batteries and new ones.
• Never leave dead batteries in the battery compartment.
• Remove the batteries if you do not plan to use the unit for long periods.
• Never try to recharge the batteries supplied with the unit.
• Do not expose batteries to direct heat, let them become shorted, or try to take them apart.
Screw A

— 8 —
4-2. To Replace the Memory Back Up Battery
* Before replacing the memory backup battery, switch on the unit and check to see if the "Low
battery!" message appears on the display. If it does, replace the main power supply batteries
before replacing the back up power supply battery.
* Never remove the main power supply and the memory back up batteries from the unit at the same
time.
* Be sure to switch the unit off before replacing batteries. Replacing batteries with power on will
cause data in memory to be deleted.
* Be sure to replace the back up power supply battery at least once 2 years, regardless of how
much you use the unit during that time. Failure to do so can cause data in memory to be deleted.
1Switch the power of the calculator off.
2Remove screw Bon the back of the calculator, and remove
the back-up battery compartment cover.
3Remove the old battery.
4Wipe off the surfaces of a new battery with a soft, dry cloth.
Load it into the calculator so that its positive +side is
facing up.
5Insert the tabs of the back-up battery compartment cover
into the slots in the back of the calculator and replace the
cover. Secure it in place with the screw.
6Switch the power of the calculator on and check for proper
operation.
Screw B
5. RESET OPERATION
Warning!
The procedure described here clears all memory contents. Never perform this operation unless you
want to totally clear the memory of the calculator.
You should perform the RESET operation whenever you want to initialize the calculator. If you need
the data currently stored in memory, be sure to write it down somewhere before performing the
RESET operation.
• To reset the calculator
1Switch the power of the calculator on.
2Press
MENU
to display the Main Menu.
3Use the cursor keys to select the OPTION icon and
then press
EXE
. Or you can simply press
Inc
while
the Main Menu is displayed.
OPTION
TO SELECT: [ ↓][ ↑ ]
TO SET : [EXE]
COLOR CONTRAST
RESET

— 9 —
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
RESET
RESET
ALL MEMORIES?
RESET ALLN OYES
F1
4Use to select RESET and then press
EXE
.
5Press F1 (YES) to reset the calculator, or F6 (NO) to abort the reset operation.
F1 (YES)
6After you finish the RESET operation, adjust the color contrast.
Resetting the calculator initializes the unit to the following settings.
Item
Mode
Unit of Angular Measurement
Norm
BASE-N
Value Memories
Expanded Memory
Function Memory
Ans Memory
Graphic Display
Text Display
Equation Memory
Statistical Data Memory
Matrix Memory
Graphic Function Memory
Dynamic Graph Functions
Table & Graph Data
Input Buffer
Program/File Memory
Initial Setting
COMP
Deg
Norm 1
Dec
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
RESET
ALL MEMORIES!

— 10 —
• Be sure to always keep written copies of all important data in case
you accidently delete it using the RESET operation.
• If the calculator stops operating correctly for some reason, use a
thin, pointed object to press the RESET button on the back of the
calculator. This should make the RESET confirmation screen
appear on the display. Perform the procedure described above to
complete the RESET operation.
• If the RESET confirmation screen does not appear when you press
the RESET button, keep pressing the button until it does.
RESET button
Message
Syn ERROR
Ma ERROR
Go ERROR
7. ERROR MESSAGE
Meaning
1Calculation formula contains an error.
2Formula in a program contains an
error.
1Calculation result exceeds calculation
range.
2Calculation is performed outside the
input range of a function.
3Illogical operation (division by zero,
etc.)
4Poor precision in Σcalculation results.
5Poor precision in differential calcula-
tion results.
6Poor precision in integration calcula-
tion results.
7Cannot find results of equation calcula-
tions.
1No corresponding Lbl nfor Goto n.
2No program stored in program area
Prog n.
Countermeasure
1Use or to display the point
where the error was generated and
correct it.
2Use or to display the point
where the error was generated and
then correct the program.
1234
Check the input numeric value and
correct it.
When using memories, check that the
numeric values stored in memories are
correct.
5Try using a smaller value for ∆ x(x
increment/decrement).
6Try using a larger value for n(number
of partitions).
7Check the coefficients of the equation.
1Correctly input a Lbl nto correspond to
the Goto n, or delete the Goto nif not
required.
2Store a program in program area Prog
n, or delete the Prog n if not required.
6. WELDING CONDITION FOR THE CERAMIC OSCILLATOR (CSTC4.30MG-TC)
Because the heat-resisting test for welding the ceramic oscillator (CSTC4.30MG-TC) was adminis-
tered by factory under the condition that weld temperature was 240 ±5 °C and welding time was 3 ±
1 seconds after the preheating of 150 ±30 °C temperature and 60 seconds time, it is recommended
that you should give first priority to take the welding condition, 150 ±30 °C and 60 seconds for
preheating, and 230 ±5 °C and less 20 seconds for welding, if you have to weld the ceramic oscilla-
tor (CSTC4.30MG-TC).

— 11 —
Message
Ne ERROR
Stk ERROR
Mem ERROR
Arg ERROR
Dim ERROR
Meaning
• Nesting of subroutines by Prog nex-
ceeds 10 levels.
• Execution of calculations that exceed
the capacity of the stack for numeric
values or stack for calculations.
1Specified expanded value memory
does not exist.
2Not enough memory to expand value
memories specified number.
3Not enough memory to input a function
into function memory.
4Not enough memory to create a matrix
using the specified dimension.
5Not enough memory to hold matrix
calculation result.
6Not enough memory to store statistical
data.
7Not enough memory to input coeffi-
cient for equation.
8Not enough memory to hold equation
calculation result.
9Not enough memory to hold function
input in the Graph Mode for graph
drawing.
0Not enough memory to hold function
input in the DYNA Mode for graph
drawing.
ANot enough memory to hold function or
recursion input in the TABLE Mode.
Incorrect argument specification for a
command that requires an argument.
• Illegal dimension used during matrix
calculations.
Countermeasure
• Ensure that Prog nis not used to return
from subroutines to main routine. If
used, delete any unnecessary Prog n.
• Trace the subroutine jump destinations
and ensure that no jumps are made
back to the original program area.
Ensure that returns are made correctly.
• Simplify the formulas to keep stacks
within 10 levels for the numeric values
and 26 levels for the calculations.
• Divide the formula into two or more
parts.
1Use
SHIFT
Defm
to correctly expand the
number of value memories.
234567890A
• Keep the number of value memories
you use for the operation within the
number of value memories currently
available.
• Simplify the data you are trying to store
to keep it within the available memory
capacity.
• Delete no longer needed data to make
room for the new data.
Correct the argument.
• Sci n, Fix n: n= integer from 0 through
9.
• Lbl n, Goto n:n = integer from 0 through
9.
• Prog n: n = 0 through 9, A through Z, r,
θ .
• Defm n:n = integer from 0 up to the
number of remaining bytes.
• Check matrix dimension.

— 12 —
Message
TRANSMIT
ERROR!
RECEIVE
ERROR!
MEMORY
FULL!
Meaning
Problem with cable connection or param-
eter setting during data communications.
Problem with cable connection or param-
eter setting during data communications.
Memory of receiving unit became full
during program data communications.
Countermeasure
•Check cable connection.
•Check to see that the parameters of the
sending unit and receiving unit are
identical.
•Check cable connection.
•Check to see that the parameters of the
sending unit and receiving unit are
identical.
•Delete some data stored in the receiv-
ing unit and try again.
DISPLAY
(OFF)
Frame is displayed
No color, no display
Red dots are displayed
Green dots are displayed
NOTE
Reset
TEST mode menu
Check for display
Check for display
Check for display
Check for display
8.OPERATION CHECK
RESET
ALL MEMORIES !
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
RUN / COMP
ZM PLT LIN CLS
G-type
Angle
Display
M-D/Cpy
: REC/CON
: Deg
: Nrm1
: M-Disp
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
OPERATION
Use a thin and pointed object to
press the RESET button on the
back of the unit.
F1
SHIFT
AC/ON
Press
F6 ab/c
AC/ON
keys at same
time.
1
EXE
EXE
EXE
STEP
1
2
3
4
5
6
7
8
9
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
RESET
ALL MEMORIES?
RESET ALLYES NO

— 13 —
DISPLAY
Blue dots are displayed
Checkers are displayed
Reverse checkers are displayed
Trace
Zoom, Plot, Line, ······
ROMSIZE 4M byte
ROM OK
RAMSIZE 64K byte
RAM OK
RAM2 OK
OPERATION
EXE
EXE
EXE
EXE
EXE
EXE
2
F1 F2 F3
······
······
EXE
4
EXE
3
STEP
10
11
12
13
14
15
16
17
18
19
20
21
NOTE
Check for display
Check for display
Check for display
Color check.
If the colors do not
appear accurately,
please take the
adjustment men-
tioned in the
section 9.
Color check
TEST mode menu
Check for keys
Check for keys.
To push the key
sequentially that is
being appeared in
the display.
TEST mode menu
ROM check
TEST mode menu
RAM check
Four colors are displayed
Blue
No color
Orange
Green
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
Four colors are displayed
Blue
No color
Orange
Green

— 14 —
OPERATION
EXE
0
F1
SHIFT AC/ON
STEP
22
23
24
25
NOTE
TEST mode menu
Reset
End
DISPLAY
(OFF)
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
RESET
ALL MEMORIES !
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
9.COLOR ADJUSTMENT ON OPERATION CHECK
STEP
1
2
3
4
5
NOTE
Reset
TEST mode menu
DISPLAY
(OFF)
RESET
ALL MEMORIES !
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
RUN / COMP
ZM PLT LIN CLS
G-type
Angle
Display
M-D/Cpy
: REC/CON
: Deg
: Nrm1
: M-Disp
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst
OPERATION
Use thin and pointed object to
press the RESET button on the
back of the unit.
F1
SHIFT
AC/ON
Press F6
ab/c AC/ON
keys at
same time.
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
RESET
ALL MEMORIES?
RESET ALLYES NO
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
RESET
ALL MEMORIES?
RESET ALLYES NO

— 15 —
EXIT
+–
ORANGE
BLUE
GREEN
CONTRAST
COLOR
,,,,,
,,,,,
,,,,,
,,,,,
IN.AINIT
O B G
OPERATION
7
or
Take the steps as same as the
end of OPERATION CHECK to
end this adjustment.
STEP
6
7
8
9
10
DISPLAY NOTE
Color adjustment
mode
Aim at the
CONTRAST
Adjust the color
until the primary
colors appear
accurately.
TEST mode menu
End
+–
ORANGE
BLUE
GREEN
CONTRAST
COLOR
,,,,,
,,,,,
,,,,,
,,,,,
IN.AINIT
O B G
+–
CONTRAST
COLOR
,,,,,
,,,,,
,,,,,
,,,,,
IN.AINIT
O B G
LX392 TEST MODE
1. LCD
2. KEY
3. RAM
4. ROM
5. DET
6. TRS
7. Cnt
0. Rst

— 16 —
10. DATA TRANSFER CHECK
Turn off both units and connect them by using the cable SB-60.
Press
F6 ab/c AC/ON
keys at same
time.
6
1
1
EXE
2
EXE
AC/ON
Take the steps as
same as the end
of OPERATION
CHECK to end
this check.
STEP
1
2
3
4
5
6
7
8
9
10
11
OPERATION DISPLAY
MASTER SLAVE DISPLAY
LX392 TEST MODE
1. LCD 5. DET
2. KEY 6. TRS
3. RAM 7. Cnt
4. ROM 0. Rst
TRANSMIT Check
1. COM Check
2. Random Data Out
0. Self
1. Send
2. Receive
WAITING
WAITING
COM OK
0. Self
1. Send
2. Receive
SENDING
COM END
0. Self
1. Send
2. Receive
LX392 TEST MODE
1. LCD 5. DET
2. KEY 6. TRS
3. RAM 7. Cnt
4. ROM 0. Rst
LX392 TEST MODE
1. LCD 5. DET
2. KEY 6. TRS
3. RAM 7. Cnt
4. ROM 0. Rst
TRANSMIT Check
1. COM Check
2. Random Data Out
0. Self
1. Send
2. Receive
SENDING
COM END
0. Self
1. Send
2. Receive
WAITING
WAITING
COM OK
0. Self
1. Send
2. Receive
LX392 TEST MODE
1. LCD 5. DET
2. KEY 6. TRS
3. RAM 7. Cnt
4. ROM 0. Rst
Press
F6
ab/c
AC/ON
keys at same
time.
6
1
2
EXE
1
EXE
Take the steps as
same as the end
of OPERATION
CHECK to end
this check.
OPERATION NOTE
TEST mode
menu
Check for
sending
Check for
receptivity
TEST mode
menu
End

— 17 —
Important
• Keep the connectors of the CFX-9800G covered when you are not using them.
11-2. Before Starting Data Communications
Before actually starting data communications, you should first enter the LINK Mode from the Main
Menu.
To Enter the LINK Mode
Highlight the LINK icon on the Main Menu.
Press
EXE
to display the LINK Mode.
The following are the operations that can be selected from the function menu at the bottom of the
display. Press the function key below the operation you want to perform.
F1 (TRN) .............Transmit
F2 (RCV) .............Receive
F6 (SET) .............Set up display
COMMUNICATION
PARITY : EVEN
BPS : 9600
M–D/Cpy : M–Disp
TRN RCV SET
F1 F2 F6
EXE
11. DATA COMMUNICATIONS
• Though you can transfer programs between the CFX-9800G and another CFX-9800G, an fx-
7700GB, an fx-7700GE an fx-7700GH, an fx-9700GE, an fx-9700GH, an OH-7700GE, an OH-
9700GE or an fx-8700GB, all of the examples in this manual cover data transfer with another
CFX-9800G only.
11-1. Connecting Two CFX-9800G Units
The following procedure describes how to connect two Power Graphic units with an optional SB-62
connecting cable for transfer of programs between them.
To Connect Two CFX-9800G Units
1. Check to make sure that the power of both CFX-9800G units is off.
2. Remove the covers from the connectors of the two Power Graphic units.
• Be sure you keep the connector covers in a safe place so you can replace them after you
finish your program communications.
3. Connect the two units using the SB-62 cable.
SB-62 cable

— 18 —
TRANSMIT DATA
ALL
Program
Editor
Function Memory
Matrix
Statistics
Variable Memory
RECEIVE DATA
ALL
Program
Editor
Function Memory
Matrix
Statistics
Variable Memory
Pointer Indicates more below
About the Data Type Selection Screen
Whenever you press
F1
(TRN) to send data or
F2
(RCV) to receive data, a data type selection
screen appears on the display.
Send Unit Receive Unit
F1 (TRN)
F2
(RCV)
The following table describes what each of these items means. You will learn later how to make a
selection using these screens.
Note
• If the selections you make on the send unit and receive unit do not match, a TRANSMIT ERROR
will be generated on the sender and a RECEIVE ERROR will be generated on the receiver.
11-3. Setting Communications Parameters
Before you can perform data communications, you must first set up certain hardware parameters to
make sure that the two units are able to understand each other. The parameters of the sender and
the receiver must be identical for them to be able to communicate correctly. There are two hardware
parameters that you can set.
Selection Meaning
ALL All data from Program to Equation
Program Program data
Editor File names and file data
Function Memory Function memory contents
Matrix Matrix memory contents
Statistics Single-variable and paired-variable statistical data
Variable Memory Value memory and extended memory contents
Range Graph range parameters
Factor Factor function zoom ratios
Table Table & Graph function data
Graph Function Graph functions, graph draw/non-draw specifica-
tion, graph color specification.
Dynamic Graph Dynamic Graph function data
Equation Equation coefficients
Back Up All memory contents, including mode settings
Parameter Settings
EVEN
PARITY ODD
NONE
1200
2400
4800
9600
Speed (BPS)