Casio CFX-9800G Service Manual & Parts List
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Casio CFX-9800G Service Manual & Parts List

Casio CFX-9800G Service Manual & Parts List

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CFX-9800G
(LX-392AA)
MAR. 1995
INDEX
R

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Summary of Contents for Casio CFX-9800G

  • Page 1 (without price) CFX-9800G (LX-392AA) MAR. 1995 INDEX...

  • Page 2: Table Of Contents

    COLOR ADJUSTMENT ON OPERATION CHECK ........14 DATA TRANSFER CHECK ................16 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.

  • Page 3: Schematic Diagram

    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. — 1 —...

  • Page 4: Power Supply And Key Block

    1-2. Power Supply and Key Block — 2 —...

  • Page 5: Specifications

    2. SPECIFICATIONS Three colors (orange, blue, green); 16-character × 8-line liquid crystal Display system: display; 10-digit mantissa and 2-digit exponent for calculations; 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...

  • Page 6: General Guide

    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 key.

  • Page 7: About Display Colors

    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.

  • Page 8: About Low Battery Warning

    COLOR O B G ORANGE BLUE GREEN – CONTRAST INIT IN·A (INIT) . Returns tint to default setting. (IN·A) . Returns tint and contrast to default setting. • To adjust the contrast 1. Use to move the pointer to CONTRAST. 2.

  • Page 9: To Replace The Main Power Supply Batteries

    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.

  • Page 10: To Replace The Memory Back Up Battery

    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.
  • Page 11 4 Use to select RESET and then press RESET RESET ALL MEMORIES? RESET ALL N O 5 Press (YES) to reset the calculator, or (NO) to abort the reset operation. RESET (YES) ALL MEMORIES! 6 After you finish the RESET operation, adjust the color contrast. Resetting the calculator initializes the unit to the following settings.

  • Page 12: Welding Condition For The Ceramic Oscillator

    • Be sure to always keep written copies of all important data in case RESET button 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.
  • Page 13 Message Meaning Countermeasure Ne ERROR • Nesting of subroutines by Prog n ex- • Ensure that Prog n is not used to return ceeds 10 levels. 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.

  • Page 14: Operation Check

    Meaning Countermeasure Message • Check cable connection. Problem with cable connection or param- TRANSMIT • Check to see that the parameters of the eter setting during data communications. ERROR! sending unit and receiving unit are identical. • Check cable connection. RECEIVE Problem with cable connection or param- •...
  • Page 15 STEP OPERATION DISPLAY NOTE Blue dots are displayed Check for display Checkers are displayed Check for display Reverse checkers are displayed Check for display Color check. Four colors are displayed If the colors do not appear accurately, please take the adjustment men- tioned in the section 9.

  • Page 16: Color Adjustment On Operation Check

    STEP OPERATION DISPLAY NOTE LX392 TEST MODE TEST mode menu 1. LCD 5. DET 2. KEY 6. TRS 3. RAM 7. Cnt 4. ROM 0. Rst Reset RESET RESET ALL MEMORIES? RESET ALL RESET ALL MEMORIES ! (OFF) SHIFT AC/ON 9.
  • Page 17 NOTE STEP OPERATION DISPLAY COLOR Color adjustment O B G mode ORANGE BLUE GREEN – CONTRAST INIT IN.A at the COLOR O B G CONTRAST ORANGE BLUE GREEN – CONTRAST INIT IN.A Adjust the color COLOR until the primary O B G colors appear accurately.

  • Page 18: Data Transfer Check

    10. DATA TRANSFER CHECK Turn off both units and connect them by using the cable SB-60. MASTER SLAVE NOTE STEP OPERATION DISPLAY OPERATION DISPLAY Press LX392 TEST MODE Press LX392 TEST MODE TEST mode ab/c AC/ON ab/c AC/ON keys at same keys at same menu time.

  • Page 19: Data Communications

    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.

  • Page 20: Setting Communications Parameters

    About the Data Type Selection Screen Whenever you press (TRN) to send data or (RCV) to receive data, a data type selection screen appears on the display. Send Unit Receive Unit (TRN) (RCV) TRANSMIT DATA RECEIVE DATA Program Program Editor Editor Function Memory Function Memory...

  • Page 21: Using All, Range, And Factor

    To Set CFX-9800G Parameters Starting from the LINK Mode: (SET) (or SHIFT SET UP PARITY : EVEN : 9600 M–D/Cpy : M–Disp EVN ODD NON • This display shows the currently set parameters. Press the function key that corresponds to the parity you want to set.

  • Page 22: Data Communications Precautions

    (YES) (YES) = = TRANSMITTING = = = = RECEIVING = = ALL DATA ALL DATA TO STOP : [ AC ] TO STOP : [ AC ] * Pressing interrupts the send operation and * Pressing interrupts the receive operation and returns to the LINK Mode.

  • Page 23: Pin Function

    12. PIN FUNCTION 12-1. CPU (HD62119A02) Pin No. Pin Name Input / Output Function 1,3~12 KO1~KO10,KO12 Key common signal 14~20 KI1~KI7 Key input signal Interrupt input 24~42 AO0~AO18 Address bus OEBO Enable signal WEBO Enable signal to write 48~51 CS4BO~CS7BO Chip selecting signal 52~59 IO0~IO7...

  • Page 24: Rom (Mb834000Cpf-G-4Ep)

    12-2. ROM (MB834000CPF-G-4EP) Pin No. Pin Name Input / Output Function Power supply 2~12,23,25~31, A0~A18 Address input 13~15,17~21 D0~D7 Data output Ground Chip enable input from CPU Output enable input from CPU Power supply 12-3. RAM (256SRAM/3V) Pin No. Pin Name Input / Output Function 1~10,21,23~26,...

  • Page 25: Troubleshooting

    13. TROUBLESHOOTING SYMPTOM CAUSE SOLUTION Clean or adjust pressure of Dirt or poor contact on battery Intermittent display contact Clean or replace power Poor contact on power switch switch Resolder or replace Poor connection on PC joiner Resolder Poor soldering on LSI, capacitor, or resistor Replace battery No display at all Weak battery...

  • Page 26: Disassembly And Exploded View

    14. DISASSEMBLY AND EXPLODED VIEW 1. Loosen both J and M screws on the battery covers K and L after removing the hard case l from the body, and remove the battery covers and batteries. 2. Loosen the four screws N on the lower case E, and remove this lower case from the body. 3.
  • Page 27 54 55 56 57 — 25 —...
  • Page 28 Obverse side Reverse side Fig. 1. L392-1 assembly and L392-2 assembly. — 27 —...
  • Page 29 15. PARTS LIST FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price L392-1 ASS'Y 6413 4940 PCB L392-1 Ass'y A140050*1 (This assembly contains the following available elements.) LSI1 2012 0546 HD62119A02 LSI3 2012 0406 MB834000CPF-G-4EP LSI4 2011 3955 UPD43256BGU-B12 2105 3213 C-MOS IC...

  • Page 30: Parts List

    FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 2105 4074 CMOS IC S-80724AL-AM-T1 1 10 3501 6538 Miniature jack HSJ1169-012010 2259 0959 Chip digital transistor DTC114YKT-146 1 20 2792 1191 Chip resistor MCR10EZHJ182 1 20 2792 0462 Chip resistor MCR10EZHJ473 1 20...
  • Page 31 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926...

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