Casio FX-7700GE User manual

fx-7700GE(LX-375)
MAR. 1994
R
(without price)
INDEX

CONTENTS
1. SCHEMATIC DIAGRAM
1-1. MAIN BOARD I........................................................................................... 1
1-2. MAIN BOARD II...........................................................................................2
1-3. MAIN BOARD III..........................................................................................3
2. SPECIFICATIONS............................................................................................. 4
3. OPERATION CHECK .........................................................................................5
4. DATA COMMUNICATIONS
4-1. CONNECTING TWO fx-7700GE UNITS ...................................................10
4-2. BEFORE STARTING DATA COMMUNICATIONS...................................11
4-3. SETTING COMMUNICATIONS PARAMETERS ......................................12
4-4. USING ALL TO SEND ALL DATA............................................................13
4-5. USING PROGRAM TO SEND PROGRAM DATA ....................................15
4-6. DATA COMMUNICATIONS PRECAUTIONS...........................................16
5. TROUBLESHOOTING......................................................................................17
6. DISASSEMBLY VIEW......................................................................................18
7. PARTS LIST .................................................................................................... 22

— 1—
1. SCHEMATIC DIAGRAMS
1-1. MAIN BOARD I

— 2—
1-2. MAIN BOARD II

— 3 —
1-3. MAIN BOARD III

— 4 —
CURRENT CONSUMPTION
TYP [µA] MAX [µA]
ON 2673 5147
OFF 15
2. SPECIFICATIONS
Display system: 16-character x 8-line liquid crystal display; 10-digit mantissa and 2-digit expo-
nent for calculations; displays binary, octal, hexadecimal, sexagesimal values,
fraction
Power supply: Main: Four AAA-size batteries (LR03(AM4) or R03 (UM-4))
Memory protection: One CR2032 lithium battery
Power consumption: 0.1W
Battery life: Main: Approximately 350 hours (continuous display of 0) on battery type LR03
(AM4)
Approximately 200 hours (continuous display of 0) on battery type R03
(UM-4)
Approximately 2 years (power switch off) on LR03 (AM4)/R03 (UM-4)
Memory protection: Approximately 1 year
Auto power off: Power is automatically switched off approximately six minutes after last opera-
tion.
Ambient
temperature range: 0°C ~ 40°C (32°F ~ 104°F)
Dimensions: 20mmH x 85mmW x 172.5mmD (3/4"H x 33/8"W x 63/4"D)
Weight: 218.5g (7.7 oz) including batteries
Accessories: Hard Case

— 5 —
3. OPERATION CHECK
NO. OPERATION DISPLAY NOTE
1
2
3
SHIFT AC
4
5
F6 ab/cAC
Press the above keys at the
same time.
1
6
No Display
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
F1
RESET
AC MAIN MENU
COMP BASE SD REG
MAT GRAPH EQUA PRGM
LINK CONT RESET
No Display
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
RESET
RESET ALL MEMORIES?
RESET ALLYES NO
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
ALL MEMORIES!
✽
✽
✽
✽
✽
✽

— 6 —
NO. OPERATION DISPLAY NOTE
7
8
EXE
EXE
9
10
11
12
Reverse checker display
Checker Display
EXE
EXE
EXE
2
All dot display
Frame didsplay
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
Trace

— 7 —
F1 (Trace)F2 (ZOOM)F3 (Plot)
F4 (Line) F5 (cls) F6 (coord)
SHIFT ALPHA EXIT MENU
G↔T Graph Range MDisp
X.Q.T log In Sin Cos Tan
ab/cX2( ) ➩> 8 9
DEL AC 4 5 6 ✕ ÷1 2
3 + – 0 . EXP (-)
NO. OPERATION DISPLAY NOTE
13
14
15
17
4
ZOOM Press the key
sequentially
appeared on the
display.
➔
➔
➔
➔
<
EXE
3
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
...
16
<< RAM OK >>
–
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
EXE
A few seconds
after
...

— 8 —
NO. OPERATION DISPLAY NOTE
18
EXE
00A6C77D
–
A few seconds
after.
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
19
5
1
20
–
Connect the two Lx-375 by
using SB-62.
TRANSMIT CHECK
1. COM CHECK
2. RANDOM DATA OUT
Transfer side
1. TRANS
2. RECEIVE
Transfer side
(21)
1. TRANS
2. RECEIVE
Receive side
< Set the receive side machine. >
•Operate the in order of
No.1~5.
•Press the 5 key.
LX-375 LX-375
SB-62
LX-375LX-375
receive side
transfer side

— 9 —
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
ALL MEMORIES!
✽
✽
✽
✽
✽
✽
NO. OPERATION DISPLAY NOTE
23
DATA RECEIVE
TO STOP
PRESS AC KEY
(22)
Receive side
TRANSMITTED
24
EXE
Remove the SB-62.
0
25
26
END
2
1Transfer side
<< RECEIVE OK >> Receive side
No Display
SHIFT AC
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst

— 10 —
4. DATA COMMUNICATIONS
■General Procedure
The following is the general procedure to follow when performing data communications. Details of each
procedures are presented in the following sections of this chapter.
• Though you can transfer data between the fx-7700GE and another fx-7700GE, an fx-7700GB or an fx-
8700GB, all of the examples in this manual cover data transfer with another fx-7700GE only.
1. Connect the two units.
2. Set up the two units with the same parameters.
3. Set up one unit to send, and the other unit to receive.
4. On the receive unit, specify the data to be received and put the unit into receive standby.
5. On the send unit, specify the data to be sent and start the send operation.
4-1. CONNECTING TWO fx-7700GE 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 fx-7700GE Units
1. Check to make sure that the power of both fx-7700GE 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
Important
• Keep the connectors of the fx-7700GE covered when you are not using them.

— 11 —
F1
■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)
MENU
EXE
COMMUNICATION
PARITY : EVEN
BPS : 9600
F1: TRANSMIT
F2: RECEIVE
F3: PARAMETERS
TRN RCV PRM
F1 F2 F6
or
4-2. 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
or to display the LINK Mode.
Thefollowing are the operations that can beselected fromthe functionmenu atthe bottomof thedisplay. Press
the function key below the operation you want to perform.
F1 (TRN) .............Transmit
F2 (RCV) .............Receive
F6 (PRM).............Parameter settings
TRANSMIT DATA
ALL
Program
Editor
Function Mem
Matrix
Statistics
Variable Mem
Range
Pointer Indicates more below
RECEIVE DATA
ALL
Program
Editor
Function Mem
Matrix
Statistics
Variable Mem
Range
9
F1
9

— 12 —
PARAMETERS
TO SELECT : [ ] [ ]
[ ] [ ]
TO SET : [ EXE ]
EVEN
PARITY
EVEN ODD NONE
BPS (x100)
12 24 48 96
The following table describes what each of these items means. You will learn later how to make a selection
using these screens.
Parameter Settings
EVEN
Parity ODD
NONE
12(1200)
24(2400)
48(4800)
96(9600)
Speed (BPS)
■To Set fx-7700GE Parameters
Starting from the LINK Mode:
F6 (PRM)
* The parameters that are currently set are highlighted on the display.
Pointer
Selection Meaning
ALL All data from Program to Equation
Program Program data
Editor File names and file data
Function Mem Function memory contents
Matrix Matrix memory contents
Statistics Single-variable and paired-variable statistical data
Variable Mem Value memory and extended memory contents
Range Graph range parameters
Factor Factor function zoom ratios
Table Table & Graph function data
Graph Function Graph functions
Equation Equation coefficients
Back Up All memory contents, including mode settings
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.
4-3. SETTING COMMUNICATIONS PARAMETERS
Before you can perform data communications, you must first set up cartain 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.

— 13 —
PARAMETERS
PARITY
EVEN ODD NONE
BPS (x100)
12 24 48
TO SELECT : [ ] [ ]
[ ] [ ]
TO SET : [ EXE ]
NONE
96
COMMUNICATION
PARITY : NONE
BPS : 9600
F1: TRANSMIT
F2: RECEIVE
F6: PARAMETERS
TRN RCV PRM
The pointer indicate which parameter you can change. Use and to move the highlighting and change
the parameter where the pointer is located.
Use and to move the pointer up and down.
After the parameters are highlighted the way you want, press
EXE
to store them.
• To abort the parameter setting procedure and return the settings to what they were before you changed
them, press
AC
before pressing
EXE
to store the parameters.
4-4. USING ALL TO SEND ALL DATA
The following procedures show how to send all data, from Program to Equation from one fx-7700GE unit
to another.
•Warning!
The following operation causes data in the seven applicable memory areas (program, function memory,
matrix memory, single-variable and paired-variable statistical data memory, value and extended
mempry, graph function memory, and equation coefficient memory) of the receiving unit to be replaced
by the received by the received data. Make sure that you do not need the data stored in the receiving
unit before you start this operation.
EXE

— 14 —
RECEIVE DATA
ALL
Program
Editor
Function Mem
Matrix
Statistics
Variable Mem
Range
TRANSMIT DATA
ALL
Program
Editor
Function Mem
Matrix
Statistics
Variable Mem
Range
•To send ALL data
Send Unit
Starting from the LINK Mode, press the function key
to enter the send mode.
F1 (TRN)
Make sure that the pointer is located at ALL, and
press
EXE
to specify it as the data type.
EXE
Press
F1
(YES) to start the send operation, or
F6
(NO) to abort without sending anything.
F1 (YES)
* Pressing
AC
interrupts the send operation and
returns to the LINK Mode.
The following appears after the send operation is
complete.
* Press AC to return to the LINK Mode.
Receive Unit
Starting from the LINK Mode, press the function key
to enter the receive mode.
F2
(RCV)
Make sure that the pointer is located at ALL, and
press
EXE
to specify it as the data type.
EXE
Press F1 (YES) to start the receive operation, or
F6
(NO) to abort without receiving anything.
F1
(YES)
* Pressing
AC
interrupts the receive operation and
returns to the LINK Mode.
The following appears after the receive operation is
complete.
= = TRANSMITTING = =
ALL DATA
TO STOP : [ AC ]
= = RECEIVING = =
ALL DATA
TO STOP : [ AC ]
COMMUNICATION
COMPLETE
ALL DATA
PRESS [ AC ]
COMMUNICATION
COMPLETE
ALL DATA
PRESS [ AC ]
= = TRANSMIT = =
ALL DATA
NO
F1 F6
YES
= = RECEIVE = =
ALL DATA
YES NO
F1 F6

— 15 —
= = TRANSMIT = =
BACK UP
YES NO
F1 F6
= = TRANSMITTING = =
BACK UP
TO STOP : [ AC ]
4-5. USING PROGRAM TO SEND PROGRAM DATA
The following procedures show how to send program data from one fx-7700GE unit to another. You can
specify one specific program or all programs for the communication operation.
•To send all PROGRAM data
Send Unit
Starting from the LINK Mode, press F1 (TRN) to enter
the send mode.
Move the pointer to Program, and press
EXE
to
specify it as the data type.
EXE
•To back up all data
Send Unit
Starting from the LINK Mode, press F1 (TRN) to enter
the send mode.
Move the pointer to Back Up, and press
EXE
to
specify it as the data type.
EXE
Press F1 (YES) to start the send operation, or
F6
(NO) to abort without sending anything.
F1 (YES)
* Pressing
AC
interrupts the send operation and
returns to the LINK Mode.
Receive Unit
Starting from the LINK Mode, press
F2
(RCV) to
enter the receive mode.
Move the pointer to Program, and press
EXE
to
specify it as the data type.
EXE
Receive Unit
Starting from the LINK Mode, press
F2
(RCV) to
enter the receive mode.
Move the pointer to Back Up, and press
EXE
to
specify it as the data type.
EXE
Press F1 (YES) to start the send operation, or
F6
(NO) to abort without receiving anything.
F1
(YES)
*Pressing
AC
interrupts the receive operation and
returns to the LINK Mode.
= = RECEIVING = =
BACK UP
TO STOP : [ AC ]
= = TRANSMIT = =
PROGRAM
F1 F2
ALL ONE
= = RECEIVE = =
PROGRAM
F1 F2
ONEALL
= = RECEIVE = =
BACK UP
YES NO
F1 F6

— 16 —
The following appears after the send operation is
complete.
* Press
AC
to return to the LINK Mode.
The following appears after the receive operation is
complete.
COMMUNICATION
COMPLETE
BACK UP
PRESS [ AC ]
COMMUNICATION
COMPLETE
BACK UP
PRESS [ AC ]
4-6. DATA COMMUNICATIONS PRECAUTIONS
Note the following precautions whenever you perform data communications.
• A TRANSMIT ERROR occurs whenever you try to send data to a receiving unit that is not yet standing by
to receive data. When this happens, press AC to clear the error and try again, after setting up the receiving
unit to receive data.
• A RECEIVE ERROR occurs whenever the receiving unit does not receive any data approximately six
minutes after it is set up to receive data. When this happens, press
AC
to clear the error.
• A TRANSMIT ERROR or RECEIVE ERROR occurs during data communications if the cable becomes
disconnected, if the parameters of the two units do not match, or if any other communications problem
occurs. When this happens, press
AC
to clear the error and correct the problem before trying data
communications again. In this case, any data received before the problem occurred is cleared from the
receiving unit's memory.
• A MEMORY FULL operation occurs if the receiving unit memory becomes full during data communications.
When this happens, press AC to clear the error and delete unneeded data from the receiving unit to make
room for the new data, and then try again.

— 17 —
5. TROUBLESHOOTING
Clean or adjust pressure of
contact
Clean or replace power
switch
Resolder or replace
Resolder
Replace battery
Clean or adjust pressure of
contact
Clean or replace power
switch
Resolder or replace
Replace
Replace the heat seal
Resolder or replace display
PCB ass'y
Clean or replace contact
Clean or replace the key
Resolder
Replace
Separate the contact
Replace
Clean or replace the key
Dirt or poor contact on battery
Poor contact on power switch
Poor connection on PC joiner
Poor soldering on LSI, capacitor, or resistor
Weak battery
Dirt or poor contact on battery
Poor contact on power switch
Poor connection on PC joiner
Defective LSI, capacitor, or resistor
Poor contact between LCD and PCB
Poor soldering on LSI
Dirt on key contact
Heavy key motion
Poor soldering on LSI
Defective LSI, capacitor, or resistor
Constant contact is made on a certain key
Defective LSI, capacitor, or resistor
Dirt or scratch on the key
SYMPTOM CAUSE SOLUTION
Intermittent display
No display at all
Erratic display
Certain key does not
function
All keys do not function
Heavy key motion

— 18 —
6. DISASSEMBLY VIEW