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Casio fx-7700GE Service Manual

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fx-7700GE
(LX-375)
MAR. 1994
INDEX
R

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  Summary of Contents for Casio fx-7700GE

  • Page 1 (without price) fx-7700GE (LX-375) MAR. 1994 INDEX...
  • Page 2: Table Of Contents

    1-3. MAIN BOARD III..................3 SPECIFICATIONS ..................... 4 OPERATION CHECK ..................5 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.
  • Page 3: Schematic Diagram

    1. SCHEMATIC DIAGRAMS 1-1. MAIN BOARD I — 1 —...
  • Page 4: Main Board Ii

    1-2. MAIN BOARD II — 2 —...
  • Page 5: Main Board Iii

    1-3. MAIN BOARD III — 3 —...
  • Page 6: Specifications

    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:...
  • Page 7: Operation Check

    3. OPERATION CHECK OPERATION DISPLAY NOTE MAIN MENU COMP BASE GRAPH EQUA PRGM LINK CONT RESET RESET RESET RESET ALL MEMORIES? RESET ALL RESET ALL MEMORIES! SHIFT AC No Display Lx375 TEST Press the above keys at the same time. 1.
  • Page 8 OPERATION DISPLAY NOTE Checker Display Reverse checker display All dot display Frame didsplay Lx375 TEST 1. LCD 4. ROM 2. KEY 5. TRS 3. RAM 0. rst Trace — 6 —...
  • Page 9 OPERATION DISPLAY NOTE ZOOM Press the key F1 (Trace) F2 (ZOOM) F3 (Plot) sequentially F4 (Line) F5 (cls) F6 (coord) appeared on the SHIFT ALPHA EXIT MENU display. T Graph Range MDisp X.Q.T log In Sin Cos Tan > 8 9 ÷...
  • Page 10 OPERATION DISPLAY NOTE A few seconds 00A6C77D after. – Lx375 TEST 1. LCD 4. ROM 2. KEY 5. TRS 3. RAM 0. rst Connect the two Lx-375 by using SB-62. receive side transfer side – LX-375 LX-375 LX-375 LX-375 SB-62 Transfer side TRANSMIT CHECK 1.
  • Page 11 OPERATION DISPLAY NOTE Receive side DATA RECEIVE TO STOP PRESS AC KEY (22) Transfer side TRANSMITTED << RECEIVE OK >> Receive side Lx375 TEST Remove the SB-62. 1. LCD 4. ROM 2. KEY 5. TRS 3. RAM 0. rst RESET ALL MEMORIES! SHIFT AC No Display...
  • Page 12: Data Communications

    • 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.
  • Page 13: Before Starting Data Communications

    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. MENU Press to display the LINK Mode. COMMUNICATION PARITY : EVEN : 9600...
  • Page 14: Setting Communications Parameters

    There are two hardware parameters that you can set. Parameter Settings EVEN Parity NONE 12(1200) 24(2400) Speed (BPS) 48(4800) 96(9600) To Set fx-7700GE Parameters Starting from the LINK Mode: PARAMETERS (PRM) Pointer PARITY EVEN EVEN ODD NONE BPS (x100) TO SELECT : [...
  • Page 15: Using All To Send All Data

    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,...
  • Page 16 • To send ALL data Send Unit Receive Unit Starting from the LINK Mode, press the function key Starting from the LINK Mode, press the function key to enter the send mode. to enter the receive mode. (TRN) (RCV) TRANSMIT DATA RECEIVE DATA Program Program...
  • Page 17: Using Program To Send Program Data

    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...
  • Page 18: Data Communications Precautions

    The following appears after the send operation is The following appears after the receive operation is complete. complete. COMMUNICATION COMMUNICATION COMPLETE COMPLETE BACK UP BACK UP PRESS [ AC ] PRESS [ AC ] * Press to return to the LINK Mode. 4-6.
  • Page 19: Troubleshooting

    5. TROUBLESHOOTING SYMPTOM CAUSE SOLUTION Clean or adjust pressure of Intermittent display Dirt or poor contact on battery contact Clean or replace power Poor contact on power switch switch Poor connection on PC joiner Resolder or replace Resolder Poor soldering on LSI, capacitor, or resistor Replace battery No display at all Weak battery...
  • Page 20: Disassembly View

    6. DISASSEMBLY VIEW — 18 —...
  • Page 21 — 19 —...
  • Page 22 — 20 —...
  • Page 23 — 21 —...
  • Page 24: Parts List

    PARTS LIST FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price L375-1 ASS'Y LSI1 2011 0105 HD62076A02 LSI2 2011 1239 HD66108T02 LSI3 2010 7259 MN4464S-08LL LSI4 2011 7280 HN27C301AFP20-61201 2189 2009 Linear IC LA5311M-TP-T1 2105 3213 C-MOS IC BU4066BCF-T1 1 10 2105 2982...
  • Page 25 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 2390 0364 Schottky diode MA713-TX 1 10 2360 2247 Zenner diode DTZ9.1BTT11 1 20 2301 2359 Chip diode MA151K-(TX) 1 20 2792 0462 Chip resistor MCR10EZHJ473 1 20 2792 1191 Chip resistor MCR10EZHJ182 1 10...
  • Page 26 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 6407 9880 Key contact rubber L370 A211181-1 6407 9900 Hard case L370 A211187-1 6407 9910 Battery cover L370 A211188-1 1 20 6407 9930 Flat screw A-L370 A310044-41 6 20 6407 9940 Flat screw C-L370 A310044-43...
  • Page 27 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926...