Casio FX-9700GH Troubleshooting guide

FX-9700GH(LX-395AH)
MAR. 1995
R
(without price)
fx-9700GH

CONTENTS
1. SCHEMATIC DIAGRAM
1-1. Main PCB ................................................................................................... 1
1-2. Power Supply .............................................................................................2
2. SPECIFICATIONS............................................................................................. 3
3. OPERATION CHECK .........................................................................................4
4. DATA TRANSFER CHECK................................................................................8
5. DATA COMMUNICATIONS
5-1. Connecting Two fx-9700GE Units ............................................................9
5-2. Before Starting Data Communications ....................................................9
5-3. Setting Communications Parameters ....................................................11
5-4. Using ALL, Range, and Factor................................................................11
5-5. Data Communications Precautions .......................................................13
6. PIN FUNCTION.................................................................................................14
7. TROUBLESHOOTING......................................................................................15
8. DISASSEMBLY VIEW......................................................................................16
9. PARTS LIST .................................................................................................... 21

— 1—
1. SCHEMATIC DIAGRAM
1-1. Main PCB

— 2—
1-2. Power Supply

– 3 –
2. SPECIFICATIONS
Display system: 21-character ×8-line liquid crystal display; 12-digit mantissa and 2-
digit exponent for calculations; displays binary, octal, hexadecimal,
sexagesimal values, fraction, complex number
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 650 hours with battery type LR03 (AM4)
Approximately 350 hours with battery type R03 (UM-4)
Approximately 2 years (power switch off) with LR03 (AM4)/R03
(UM-4)
Memory protection: Approximately 15 months
* The batteries that have been installed in this unit when user pur
chased 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: 20mm H ×85mm W ×172.5mm D (3/4" H ×33/8" W ×63/4" D)
Weight: 218.5g (7.7 oz) including batteries
Accessories: Hard case
TYP [µA] MAX [µA]
OFF 20.7
ON (MENU) 1430.22 2026.60
Current Consumption

– 4 –
3. OPERATION CHECK
NO. OPERATION DISPLAY NOTE
1
Turn the side switch (LOCK)
on and push the "RESET" but-
ton.
2
F1
3
SHIFT
AC
4
5
F6 ab/cAC
Press the above key at the
same time.
1
6
No Display
– – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst
RUN / COMP
G-type : RECT / CONNECT
angle : Deg
display : Norm 1
M-D/Cpy : M-Disp
ZOOM PLOT LINE CLS
✽ ✽ ✽ Lx370 TEST ✽ ✽ ✽
1. TEST MODE
2. Transmit
3. Exit
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
RESET
RESET ALL MEMORIES?
RESET ALLYES NO
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
ALL MEMORIES!
✽
✽
✽
✽
✽
✽

– 5 –
NO. OPERATION DISPLAY NOTE
7
8
EXE
EXE
9
10
11
12
No Display
FRAME Display
1
EXE
EXE
EXE
ALL DOT Display
CHECKER Display
REVERSE CHECKER Display
– – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst

– 6 –
NO. OPERATION DISPLAY NOTE
13
14
EXE
15
16
17
2
EXE – – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst
Trace
ZOOM...
3
– – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst
RAMSIZE 32K bytes
Press each key
sequentially as it
appears on the
display.
RAMSIZE 32K bytes
RAM OK After a few seconds.
F1 F2 ........................... .
............................ EXP
Trace Zoom
(–)

– 7 –
NO. OPERATION DISPLAY NOTE
18
19
F1
SHIFT AC
20
0
No Display
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
RESET
RESET ALL MEMORIES?
RESET ALLYES NO
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
ALL MEMORIES!
✽
✽
✽
✽
✽
✽

– 8 –
4. DATA TRANSFER CHECK
• Turn off both units and connect them by using SB-60.
Function Display
Master Slave
1) Press the F6 , ab/cand AC key
at the same time.
2) 1
3) 5
4) 1
5) Slave: 2
Master: 1
✽ ✽ ✽ Lx370 TEST ✽ ✽ ✽
1. TEST MODE
2. Transmit
3. Exit
– – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst
= = = TRANSMIT Check = = =
1. COM Check
2. RANDOM Data Out
0. Self
1. Send
2. Receive
COM END WAITING
COM OK
✽ ✽ ✽ Lx370 TEST ✽ ✽ ✽
1. TEST MODE
2. Transmit
3. Exit
– – Lx370 TEST MODE – –
1. LCD
2. KEY
3. RAM
4. DET
5. TRS
0. Rst
= = = TRANSMIT Check = = =
1. COM Check
2. RANDOM Data Out
0. Self
1. Send
2. Receive

– 9 –
5. DATA COMMUNICATIONS
This chapter tells you everything you need to know to transfer programs between the fx-9700GH and another
CASIO Power Graphic unit (fx-7700GB, fx-7700GE, fx-7700GH, fx-8700GB, fx-9700GE, fx-9700GH),
connected with an optionally available SB-62 cable. To transfer data between an fx-9700GH unit and a
personal computer, you will need to purchase the separately available CASIO FA-121 Ver. 2.0 Interface Unit.
This chapter also contains information on how to use the optional SB-62 cable to connect to a CASIO Label
Printer to transfer screen data for printing.
• Though you can transfer programs between the fx-9700GH and another fx-9700GH, an fx-7700GB, an fx-
7700GE, an fx-7700GH, an fx-8700GB or fx-9700GE, all of the examples in this manual cover data transfer
with another fx-9700GH only.
5-1. Connecting Two fx-9700GH 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-9700GH Units
1. Check to make sure that the power of both fx-9700GH 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.
MENU
Important
• Keep the connectors of the fx-9700GH covered when you are not using them.
5-2. 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.
SB-62 cable

– 10 –
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 (PRM).............Parameter settings
EXE
COMMUNICATION
PARITY : EVEN
BPS : 9600
F1: TRANSMIT
F2: RECEIVE
F3: PARAMETERS
TRN RCV PRM
F1 F2 F6
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.
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
Dynamic Graph Dynamic Graph function data
Equation Equation coefficients
Back Up All memory contents, including mode settings
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.

– 11 –
5-3. 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.
Parameter Settings
EVEN
PARITY ODD
NONE
1200
2400
4800
9600
Speed (BPS)
To Set fx-9700GH Parameters
Starting from the LINK Mode:
F6 (PRM)
* The parameters that are currently set are highlighted on the display.
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 and 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.
5-4. Using ALL, Range, and Factor
The following procedures show how to send data using ALL, Range, and Factor from one fx-9700GH unit
to another. The example procedure shows an operation using ALL only, but the procedures for Range
and Factor are identical.
PARAMETERS
PARITY
EVEN ODD NONE
BPS
1200 2400 4800 9600
TO SELECT : [ ] [ ]
[ ] [ ]
TO SET : [ EXE ]
EVEN
9600
Pointer
PARAMETERS
PARITY
EVEN ODD NONE
BPS
1200 2400 4800 9600
TO SELECT : [ ] [ ]
[ ] [ ]
TO SET : [ EXE ]
NONE
9600
COMMUNICATION
PARITY : NONE
BPS : 9600
EXE

– 12 –
Warning!
Transferring data using ALL causes data in the applicable memory areas of the receiving unit to be replaced
by the received data. Make sure that you do not need the data stored in the receiving unit before you start an
operation using ALL.
•To send data using ALL
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.
COMMUNICATION
COMPLETE
ALL DATA
PRESS [ AC ]
= = TRANSMIT = =
ALL
YES NO
F1 F6
= = TRANSMITTING = =
ALL DATA
TO STOP : [ AC ]
TRANSMIT DATA
ALL
Program
Editor
Function Memory
Matrix
Statistics
Variable Memory
RECEIVE DATA
ALL
Program
Editor
Function Memory
Matrix
Statistics
Variable Memory
= = RECEIVE = =
ALL
YES NO
F1 F6
COMMUNICATION
COMPLETE
ALL DATA
PRESS [ AC ]
= = RECEIVING = =
ALL DATA
TO STOP : [ AC ]

– 13 –
5-5. 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 RECEIVING 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.

– 14 –
6. PIN FUNCTION
CPU (HWD62096A03)
Pin No. Pin Name Input / Output Function
1VSS Power supply for LSI, GND
2VREG5 Regulator power, +5V
3VREG4 Regulator power for ROM, +3V
4VREG2 Regulator power, +2V
5VDT1I I Terminal for detector (All off)
6VDT2A O Terminal for detector (Lower battery)
7VDT2b I Terminal for detector (Lower battery)
8VREG1 Regulator power, +3.2V
9 VREG3 Regulator power for RAM, +3V
10 VCC Power supply for LSI, +6V
11,12 TS1,TS2 I Terminal for test
13 SW I Reset switch
14~25 KO1~KO12 O Terminal for key output
26~33 KI1~KI8 I Terminal for key input
34 ITO I Terminal for interrupt
35 RXD I Terminal for communication
36 TXD O Terminal for communication
37 OPTO O Output terminal
38 BUFON O Output terminal
39~50 AO6~AO17 O Address bus
51 VSS Power supply for LSI, GND
52,53 BZZ1,BZZ2 O Terminal for buzzer
54 VSS Power supply for LSI, GND
55~60 AO0~AO5 O Address bus
61 OEBO O Output enable terminal
62 WEBO O Write enable terminal
63~69 CS4BO~CS10BO O Chip selecter terminal
70~77 IO0~IO7 I/O Data bus
78~85 PORT0~PORT7 I/O Input/output port
86 DUMMY Dummy terminal
87,88 PI,PO Power for ceramic oscillator
89 VSSL Power supply for LSI, GND
90,91 XO,XI Power
92 DUMMY Dummy terminal
93 VSSR Power supply for LSI, GND
94~221 S1~S128 O Terminal for LCD
222~285 C1~C64 O Terminal for LCD
286 DUMMY Dummy terminal
287 VLCD Power supply for LCD, +12V
288~291 V1~V4 Power supply for LCD bias
292~296 VOL0~VOL4 Power supply for LCD contrast
297 DUMMY Dummy terminal
298~301 VD1~VD4 Power for doubler
302 VDB Power for doubler, +12V

– 15 –
7. 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

– 16 –
8. DISASSEMBLY VIEW
6
7
9
0
8
4
1
3
A
5
2 B
T
O

– 17 –
LOCK
CR2032
KL
GH
PN
QR
LOCK
CR2032
©™
CD
-
+
IJ
EF
M
S
BR

– 18 –
(–)
BB AA
B-B
A-A
(–)
UV
j
W
k
XY
fg
no
k
p
lm
hi
de
bc
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Z[
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a