Casio PA-2400U Service Manual And Parts List
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Casio PA-2400U Service Manual And Parts List

Casio PA-2400U Service Manual And Parts List

Handled personal computer
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Handheld Personal Computer
PA-2400U
(PX-686)
MAR. 1998
PA-2400U
INDEX
R

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Summary of Contents for Casio PA-2400U

  • Page 1 (without price) Handheld Personal Computer PA-2400U (PX-686) MAR. 1998 PA-2400U INDEX...

  • Page 2: Table Of Contents

    CONTENTS HARDWARE SPECIFICATIONS -------------------------------------------------------------- 1 General Specifications ------------------------------------------------------------------- 1 Electrical Specifications----------------------------------------------------------------- 2 ACCESSORIES ------------------------------------------------------------------------------------ 3 OPTIONS --------------------------------------------------------------------------------------------- 3 GENERAL GUIDE --------------------------------------------------------------------------------- 4 DESKTOP COMPUTER SYSTEM CONFIGURATION ---------------------------------- 6 SETTING UP ---------------------------------------------------------------------------------------- 7 IMPORTANT BATTERY PRECAUTIONS --------------------------------------------------- 8 Replacing the main batteries ---------------------------------------------------------- 8 Replacing the back-up batteries ------------------------------------------------------ 9 RESET ---------------------------------------------------------------------------------------------- 11 To reset the CASSIOPEIA ------------------------------------------------------------- 11...
  • Page 3 POWER SUPPLY CIRCUIT ------------------------------------------------------------------- 37 Primary Circuit---------------------------------------------------------------------------- 37 5 V Circuit ---------------------------------------------------------------------------------- 38 3 V Circuit ---------------------------------------------------------------------------------- 39 PCMCIA Circuit --------------------------------------------------------------------------- 40 LCD power Circuit ----------------------------------------------------------------------- 41 Voltage Line ------------------------------------------------------------------------------- 42 DETECTOR CIRCUIT --------------------------------------------------------------------------- 43 DIAGNOSTIC PROGRAM --------------------------------------------------------------------- 44 Introduction-------------------------------------------------------------------------------- 44 OPERATION CHECK --------------------------------------------------------------------------- 45 Voltage Detectors Check -------------------------------------------------------------- 61 DISASSEMBLY •...

  • Page 4: Hardware Specifications

    HARDWARE SPECIFICATIONS General Specifications Model: PA-2400U 480 × 240 dots, FSTN LCD, 4 grayscale monochrome Display: CPU: Memory RAM: 8M bytes ROM: 16M bytes Speaker: Sound Interfaces: RS-232C: 115.2K BPS Data communication jack PC card slot CompactFlash card slot Infrared port (IrDA compatible protocol) Communication distance: 10 to 70 cm Maximum Speed: 115.2K BPS...

  • Page 5: Electrical Specifications

    3.0 V and under (Foced power off detector for rechargeable battery) VDETS: 2.7 V and under (Low battery message detector for back-up battery) IrDA: Length (L) Angle (A) PA-2400U A = ±15 degree L = 80 cm L = 10 cm A = 0 degree PA-2400U...

  • Page 6: Accessories

    • I/O BOX PA-2110 IF (MASTER) / I/O BOX PA-2111 IF (SATELLITE) • Data Communication Cable SB-62 This cable is used to connect a digital camera or other external equipment to the PA-2400U. • Dual Battery Charger PA-2040DCHG-E Note: Optional materials are sold separately.

  • Page 7: General Guide

    GENERAL GUIDE • Software Input Panel (SIP) button Toggles the Software Input Panel on and off. Pressing this button together with the backlight button displays the calibration screen. • Backlight button Toggles the backlight on and off. The backlight also turns off automatically if •...
  • Page 8 • CompactFlash card cover • CompactFlash card eject lever • CompactFlash card lock switch Use the above when installing or re- moving a CompactFlash card. • Charge terminal Connects to a terminal in the Interface Unit for charging. • Reset button See page XX.

  • Page 9: Desktop Computer System Configuration

    DESKTOP COMPUTER SYSTEM CONFIGURATION The computer configuration described below is required to support the installer and the software applica- tions contained on the Microsoft CD-ROM supplied with the CASSIOPEIA. • Microsoft Windows NT Workstation 4.0 or Windows 95 (U.S. version) •...

  • Page 10: Setting Up

    SETTING UP 1. Load the main batteries. • Be sure to load the main batteries first. The CASSIOPEIA will not operate properly if you load the back- up batteries first. • Loading the back-up batteries first can cause the battery go dead very quickly. Replace the back-up battery whenever the low back-up battery warning message appears on the display.

  • Page 11: Important Battery Precautions

    IMPORTANT BATTERY PRECAUTIONS The CASSIOPEIA has a dual power supply that consists of a battery pack (or ,main batteries) and back-up batteries. Be sure to load the battery pack (or the main batteries) and back-up batteries before using the CASSIOPEIA. Also, charge the battery pack (or replace batteries) as soon as possible at the first sign of low power.

  • Page 12: Replacing The Back-Up Batteries

    4. Remove the old batteries from the battery holder and load two new ones. • When loading new batteries, make sure that their positive (+) and negative (–) ends are facing correctly. 5. Reattach the battery holder to the CASSIOPEIA. •...
  • Page 13 4. Remove the back-up battery compartment cover. Primary Rechargeable back-up back-up battery battery cover cover 5. Remove Screw A and then remove the primary back-up battery holder. 6. Remove the old primary back-up battery. • Do not remove the rechargeable battery while the primary battery is removed. 7.

  • Page 14: Reset

    RESET You should reset the CASSIOPEIA whenever it stops working or whenever some other operational problem has caused it to malfunction. To reset the CASSIOPEIA 1. Press the RESET button with the stylus. • This automatically turns off CASSIOPEIA power. 2.

  • Page 15: Full Reset

    FULL RESET Perform the full reset when you want to clear all memory contents and settings because memory contents are corrupted, because you have forgotten the security code, or for any other reason. Important The following procedure deletes all data in memory. Be sure to save any important data contents you may need later to a computer disk or other medium.

  • Page 16: Connecting To A Desktop Computer

    CONNECTING TO A DESKTOP COMPUTER Use the following procedure to connect the CASSIOPEIA to a desktop computer. Note that exchanging data with a desktop computer requires Microsoft Windows CE Services, which is on the Microsoft CD-ROM that is included with the CASSIOPEIA. Requirements RS-232C cable (supplied with CASSIOPEIA) To connect to a desktop computer...

  • Page 17: Replacing The Pc Card

    REPLACING THE PC CARD The CASSIOPEIA comes equipped with a PC card slot that supports memory, modem and other PC cards*. * Use only PC cards that are compatible with the CASSIOPEIA. Important • Be sure to keep the dummy card that comes with the CASSIOPEIA inserted in the card slot whenever you are not using a PC card.
  • Page 18 Important • Take care to orient the card correctly. The top of the card should be facing in the same direction as the top of the CASSIOPEIA. The card will stop part way into the slot if it is not oriented correctly. •...

  • Page 19: Replacing The Compactflash Card

    REPLACING THE COMPACTFLASH CARD The CASSIOPEIA comes equipped with a card slot that supports CompactFlash cards. Important • If the card stops part way into the slot, do not try to force it. Doing so can damage the card or the CASSIOPEIA.

  • Page 20: Connecting To A Printer

    6. Insert a new CompactFlash card into the slot. • Double-check to make sure that the card is oriented correctly before you insert it into the slot. • Push the card into the slot as far as it will go. Important •...

  • Page 21: Technical Reference

    TECHNICAL REFERENCE About CASSIOPEIA standard interfaces The following describes the interfaces that are equipped on the CASSIOPEIA as standard. Basically, operation should not be expected from any device that is not compatible with these interfaces*. 1. Serial Port: Requires a 16550 compatible UART with FIFO buffer. For RS-232C, Modem, and other connections.

  • Page 22: Memory Backup / Restore

    MEMORY BACKUP / RESTORE Make the backup copy by Windows CE Services to your PC before repairing PA-2400U, and restore the data from PC to user’s PA-2400U after repairing. For the details of Backup/Restore, refer to the operation manual of Windows CE Services.
  • Page 23 6. Click “Full: back up all data” and “Back Up Now”. 7. Confirm the file name of bakup copy and then click “OK”. Backup starts. — 20 —...

  • Page 24: Restore

    Restore Execute Restore after repairing. 1. Turn on the user’s PA-2400U and then Welcome wizard appears. 2. Execute touch panel calibration and then skip other setups after calibration. 3. Connect repaired PA-2400U to your PC with RS-232C cable. 4. Start Windows CE Services on your PC.
  • Page 25 7. Restoring starts. 8. Click “OK”. — 22 —...

  • Page 26: Block Diagram

    BLOCK DIAGRAM 10 M 32.768 K PLL X4 80 MHz SH-7093 (IC1) RAM 8 Mbyte HM51W16160 (RAM1~RAM4) CompactFlash Card ROM 16Mbyte Memory Slot (MROM1, MROM2) PCMCIA Audio Amp. Card MC34119 (IC9) LCD unit 3.68M Mini Jack L C D IrDA IrDA Transceiver Gate Array CIM-10S...

  • Page 27: Device Features

    TLB supports 1K/4K bytes page,128 entries. 8K bytes Cash. Interrupt Controller. User Break Controller. Bus State Controller. Watch Dog Timer. CASIO proprietary RTC. 2K bytes Mask ROM. ON Controller. 1 ch Serial I/F. 1 ch Serial I/F with 16 bytes FIFO. 1 channel Reload Timer.
  • Page 28 115.2 kbaud. IrDA 0 - 1 m. 9-pin RS232C ±12 V I/F. 3-pin Serial Port CASIO proprietary serial interface to Casio’s digital cameras and electric orga- nizerand so on. Up to 38.4 kbaud. 0 to +5 V I/F. Notification LED LED Controller in System LSI.

  • Page 29: Lsi/Ic Data

    LSI/IC DATA SH-7093 (CPU / IC1) N o . Pin Name I n / O u t Function To/From Data bus Data bus Data bus Data bus D23/Port 7 Data bus +3.3V source D22/Port 6 Data bus D21/Port 5 Data bus D20/Port 4 Data bus D19/Port 3...
  • Page 30 N o . Pin Name I n / O u t Function To/From Address bus +3.3V source Address bus Address bus Address bus Address bus Address bus Address bus Address bus +3.3V source Address bus Address bus Address bus Vss (PLL) GND for PLL CAP1 Capacitor connecting terminal for PLL...
  • Page 31 N o . Pin Name I n / O u t Function To/From CASHHB / CAS2HB D31-D24 / D15-D8 select signal BGA288,ROM Board CASHLB / CAS2LB D23-D16 / D7-D0 select signal BGA288,ROM Board +3.3V source WE1B D15-D8 select signal BGA288 WE0B D7-D0 select signal BGA288,LCD uint,ROM Board...

  • Page 32: Mb87A915 (Gate Array/Ic3)

    MB87A915 (Gate Array/IC3) N o . Pin Name V o l t I n / O u t Function To/From CFCE1B CE signal for CompactFlash card CompactFlash card IOPORT0 Detects I/O BOX Q131 (Power supply) IOPORT1 I/O Port 1 LCD unit V5D3 Data bus PCMCIA CARD...
  • Page 33 N o . Pin Name V o l t I n / O u t Function To/From V5D0 Data bus PCMCIA CARD V5A0 Address bus PCMCIA CARD VDD1 +5V source V5D8 Data bus PCMCIA CARD V5D1 Data bus PCMCIA CARD V5D9 Data bus PCMCIA CARD...
  • Page 34 N o . Pin Name V o l t I n / O u t Function To/From KBOUT7 Key common signal Keyboard KBOUT6 Key common signal Keyboard KBOUT5 Key common signal Keyboard KBOUT4 Key common signal Keyboard KBOUT3 Key common signal Keyboard KBOUT2 Key common signal...
  • Page 35 N o . Pin Name V o l t I n / O u t Function To/From LOCK Not used MEMCLB Not used Address bus Address bus Address bus Address bus Address bus Address bus Address bus Address bus Address bus Address bus Address bus Address bus...
  • Page 36 N o . Pin Name V o l t I n / O u t Function To/From STATUS0 STATUS0 signal from CPU 244 ONSTATUSB ONSTATUS signal from CPU CE2B CE2B signal from CPU CE2A CE2A signal from CPU VDD2 +3V source ON circuit start signal to CPU RDWRB Read/Write signal from CPU...

  • Page 37: Mc34119 (Ic2)

    MC34119 (IC2) V CC (Top View) MAX3241CAI (IC5) VCC=3 V 0.1 µf to 5.5 V C2– C1– MAX3241 V– MAX3241 V– R1IN C2– R2IN T1IN T1OUT R3IN T2IN T2OUT R4IN SHON RS-232 LOGIC OUTPUTS INPUTS R5IN R1OUTB T3IN T3OUT T1OUT R2OUTB R1OUTB T2OUT...

  • Page 38: Hn51W16160

    HN51W16160 A0 to A11 : Address Inputs I/O 1 to I/O 16 : Data Inputs/Outputs : Row Address Strobe UCAS : Column Address Strobe (upper) LCAS : Column Address Strobe (lower) : Write enable : Output enable : Power Supply : Ground : No Connection RN5VD18CA (IC113)

  • Page 39: Max608 (Ic105,Ic106)

    MAX608 (IC105,IC106) DIP/SO AGND SHDN (Top View) EMI FILTER ARRAY UPD23C64000LGY — 36 —...

  • Page 40: Power Supply Circuit

    POWER SUPPLY CIRCUIT The power supply circuit consists of 5 blocks which are Primary circuit, 5 V circuit, 3 V circuit , PCMCIA power circuit and LCD power circuit as follows; PCMCIA PCMCIA power circuit 5V circuit 5 V system Fuse Primary Alkaline...

  • Page 41: 5 V Circuit

    5 V Circuit DC/DC converter MAX608ESA (IC105) generates +5.11 V and it makes up 5 V system. VIO : +5 V source for 3-pin jack and LCD power block. BATDTCT: It distinguishes alkaline and Li-ion to change the load according to the battery. When alkaline is used, it is H.

  • Page 42: Circuit

    3 V Circuit DC/DC converter MAX608ESA (IC106) generates +3.77 V and it makes up 3 V system. V3MAIN : The reference voltage for the detector. V3SYS : +3.4 V source for IC1,IC3,IC5. V3RAM : +3.4 V source for DRAM (RAM5 ~ RAM8). V3ROM : +3.4 V source for ROM (U301,U302).

  • Page 43: Pcmcia Circuit

    PCMCIA Circuit DC/DC converter MAX1651 (IC111) generates 3.4 V VEL : 5.11 V source for LCD unit. PEL : Controls ON/OFF of VEL. From pin 160 of MB87A915 (IC3). VPC : 3.4 V or 5.11 V source for detecting PCMCIA power. PSEL5 : Power supply select signal for PCMCIA (H=5 V, L=3 V).

  • Page 44: Lcd Power Circuit

    LCD power Circuit DC/DC converter RN5VH3 (IC201) generates LCD power and it makes up LCD power system for LCD. VDD : +3.7 V source for LCD unit. VAMP : +7.0 V source for LCD unit. PLCD : Controls ON/OFF of VAMP. From pin 159 of MB87A915 (IC3). VLCD+: +15.5 V source for LCD unit.

  • Page 45: Voltage Line

    Voltage Line U301/U302 RAM5~8 BGA288 SH-7093 32M-MASK ECSTOJY106R MAX3241 MC34119 CIM-10S GATE ARRAY D-RAM RS232C AudioIC IRIC V3AUD V3RAM V3SYS V3ROM V3IRDA VCRDIF VCARD VLCD+ VLCD– Connector Connector Connector Connector LCD unit PCMCIA RS-232C 3P Jack — 42 —...

  • Page 46: Detector Circuit

    DETECTOR CIRCUIT The detector circuit consists of 7 blocks as follows; 1 : VDETECTOR1 (Alkaline and Li-ion) 5 : Full charge detector 2 : VDETECTOR2 (Alkaline and Li-ion) 6 : 3V detector (AC adaptor is not used) 3 : Backup battery detector 7 : PCMCIA voltage detector 4 : AC Adaptor detector VDETECTOR 1...

  • Page 47: Diagnostic Program

    The following steps must be followed before diagnostics. START Remove Main Be sure to keep separate back-up copies of and Backup all important data in PA-2400U, because the batteries DIAGNOSTICS make data corrupt. Load main Make sure that Battery Holder Release batteries switch is on “NORMAL OPERATION”...

  • Page 48: Operation Check

    Differences from Microsoft Windows Next Finished! Done Windows CE Menu Display Make sure the diagnostic Connect PA-2400U and a PC Copy Diag686EXE to PA-2400U from program is copied. then copy Diag686.exe onto the desk top of PA-2400U. Disconnect PA-2400U and the PC To hide task-bar open Task-bar properties.
  • Page 49 Common Operation Model selection Start diagnostic program. Model selection display appears. Ver ∗ . ∗∗ << Select Model >> Tap the model which is to be tested. 1 : EA (8MB) 2 : AA (4MB) Menu display Choose the test you want to be performed from the main menu. 1 Tapping the test No.
  • Page 50 MENU Display 1) MENU1 ∗∗ Main Menu 1 ∗∗ Ver ∗ . ∗∗ DRAM Reserve MASKROM ONkey RS-232C_LP SIP key Reserve EL key Reserve Notification key IrDA_SD Reset key IrDA_RD IrDA_Int [ BACK ] [ NEXT ] [ BACK ] [NEXT ] 2) MENU2 ∗∗...
  • Page 51 TEST Display Operation Result Tap “2.MASKROM” on the ∗∗ Main Menu 1 ∗∗ Ver ∗ . ∗∗ << MASK ROM >> display. DRAM base addr. sumvalue =∗∗∗∗ MASKROM Reserve SUM 1(A000000) =∗∗∗∗ ON key RS-232C_LP SUM 2(A000000) SIP key Reserve =∗∗∗∗...
  • Page 52 TEST Display Operation Result Tap “5.EL Key” on the display. ∗∗ Main Menu 1 ∗∗ Ver ∗ . ∗∗ << EL key >> Push EL Key DRAM MASKROM Reserve ON key RS-232C_LP SIP key Reserve EL key Reserve Notification key IrDA_SD Reset key IrDA_RD...
  • Page 53 TEST Display Operation Result Tap “1.Case” on the display. << ATP >> << ATP >> Case Case > OK Points Tap “[ EXIT ]” to go back to [ Exit ] [ Exit ] <<ATP>> Menu. Tap “2.Points” on the display. <<...
  • Page 54 TEST Display Operation Result Tap center of the display. Displays horizontal lines. Tap center of the display. Displays checker. Tap center of the display. Displays reverse checker. Tap center of the display. Displays as shown adove. Tap center of the display. Displays gradation.
  • Page 55 TEST Display Operation Result Tap center of the display. Displays gradation. Tap center of the display. Displays gradation. Tap center of the display. Displays gradation. 9-10 Tap center of the display. Goes back to Main Menu 1. 11-1 Tap “11. RS-232C_LP” on the ∗∗...
  • Page 56 TEST Display Operation Result 14-1 Tap “14. IrDA_SD” on the dis- ∗∗ Main Menu 1 ∗∗ Ver ∗ . ∗∗ play. DRAM MASKROM Reserve Note)Execute in two way com- ON key RS-232C_LP munication. SIP key Reserve EL key Reserve Notification key IrDA_SD Reset key IrDA_RD...
  • Page 57 TEST Display Operation Result 14-6 Receive data. Repeat transmit << IrDA_RD >> mode and receive mode. UUUUUUUU..To abort tap “[Exit]” on the dis- play. [ Exit ] 14-7 Tap “[Exit]” to go back to Main <<...
  • Page 58 TEST Display Operation Result T a p “ 5 . R D _ S D S p e e d : 15-4 << IrDA_RD >> 115200 bps” on the display. REC Speed : 2400bps REC Speed : 115200bps Note)T a p S D _ R D f o r t h e REC Speed : 2400bps (EX) transmitting unit.
  • Page 59 TEST Display Operation Result 18-1 Tap “18. LED_RED” on the dis- ∗∗ Main Menu 2 ∗∗ << LED_RED >> Ver ∗ . ∗∗ play. 3PIN_LP Voltage LED_RED Light -----> ON LED_RED Sleep CPMCIA CPU RUN Reserve Reserve VDET3(LB-1) AUDIO MENU1 Switch AUDIO MENU2 AUDIO...
  • Page 60 TEST Display Operation Result 24-1 Tap “24. AUDIO” on the dis- ∗∗ Main Menu 2 ∗∗ Ver ∗ . ∗∗ play. 3PIN_LP Voltage LED_RED Sleep CPMCIA CPU RUN Reserve Reserve VDET3(LB-1) AUDIO MENU1 Switch AUDIO MENU2 AUDIO Reserve [ BACK ] [ NEXT ] Tap “1.
  • Page 61 TEST Display Operation Result 24-6 Tap “5. Microphone” on the << AUDIO >> display. Speker 0.5 KHz 1 KHz 2 KHz Microhone [ Exit ] Talk against the microphone. 24-7 << MicroPhone >> [ Tap to PlayBack Start! ] Tap center of display. Or wait for 5 seconds.
  • Page 62 TEST Display Operation Result 25-2 Tap “1. VIO” on the display. << VIO >> << Voltage >> VIO ON Tap “[Exit] to go back to VCRDIF <<Voltage>> Menu. VCARD V3AUD V3REC V3IRDA [ Exit ] Turn VIO on. [ Exit ] 25-3 Tap “2.
  • Page 63 TEST Display Operation Result 25-7 Tap “6. V3REC” on the display. << V3IRDA >> << Voltage >> V3REC ON Tap “[Exit] to go back to VCRDIF <<Voltage>> Menu. VCARD V3AUD V3REC V3IRDA [ Exit ] [ Exit ] Turn V3REC on. Tap “7.

  • Page 64: Voltage Detectors Check

    Low battery message detector for back-up battery.(2.7 V ) Step Operation Display (Wiring) Note Vb = 2.6 ± 0.02 V Setting Connect the items as Alkaline battery terminal shown. PA-2400U AC adapter Charger Tap “21.LB” on the dis- << LB >> play. VDET1 VDET2 VDET1R VDET2R...
  • Page 65 Change to connect power Connect the items as Rechargeable battery terminal supply to the terminals for shown. rechargeable battery. Vr = 2.6 ± 0.02 V PA-2400U AC adapter Charger VDET1R Put power supply voltage Measure the voltage that VDET1R down by degrees.

  • Page 66: Disassembly • Assembly

    DISASSEMBLY • ASSEMBLY 1. Remove dummy card, CF card and stylus. 2. Slide the lever to release position and remove the battery cover then take the main batteries out. 3. Removal of backup battery. 1. Unscrew screw 1. 2. Remove B cover. SCREW 1 3.

  • Page 67: Removal Of Mrom Ass'y

    screw 4,5 4. Removal of MROM ass’y. 1. Unscrew screw 4 and 5, then remove ROM board cover. screw 6 2. Unscrew screw 6. 3. Remove ROM by lifting it straight up. — 64 —...

  • Page 68: Removal Of Lower Case

    5. Removal of lower case. 1. Remove eight screws. 2. Remove lower case gently from the left side. There are no hooks on the cases so that you can remove the case easily. SCREW SCREW <Separated> 3. Remove two lead wires from main PCB. —...

  • Page 69: Removal Of Main Pcb

    6. Removal of main PCB. 1. Remove two connectors. 2. Remove power supply terminal from upper case. 3. Remove two connectors. 4. Remove power supply terminal. POWER SUPPLY TERMINAL CONNECTOR 5. Unscrew screws of stylus holder. 6. Remove stylus holder. 7.

  • Page 70: Removal Of Touch Panel

    10. Remove two connectors and main PCB can be sepa- rated. 7. Removal of touch panel. 1. Follow steps 1 through 8 on "Removal of main PCB", then remove the screw as shown on the right. 2. Remove connector. 3. Unscrew two screws. 4.

  • Page 71: Exploded View

    EXPLODED VIEW — 68 —...

  • Page 72: Parts List

    PARTS LIST I t e m Code No. Parts Name Specifications COMPONENT 6512 6658 HINGE ASS'Y/COVER C341648*1 6512 7116 CARD/DUMMY C341724A-1 6540 0041 CASE ASS'Y/BATTERY (MAIN) C241035C*1 6512 6849 SCREW C442310-1 6512 7118 COVER/BATTERY (BACK-UP) C241018A-1 6512 6676 COVER/ROM C241019-1 6512 7197 COVER/CF CARD C241014B-1 6540 0249 PCB ASS'Y/ROM...
  • Page 73 I t e m Code No. Parts Name Specifications LCD UNIT TOUCH PANEL ASS'Y 6512 6714 CUSHION C442262-2 6512 6713 CUSHION C442262-1 Above items are assembled in the LCD Unit (Item 25). P686-MAIN PCB UNIT 2590 2712 OSCILLATOR/CRYSTAL CX-5F-3.6864MHz 2590 2718 OSCILLATOR/CRYSTAL MA-406#10M16PF 2590 2719 OSCILLATOR/CRYSTAL MC-306#7PF/10...

  • Page 74: Schematic Diagrams

    SCHEMATIC DIAGRAMS P668-MAIN (MAIN) DRAM to 2KEY-PCB to PWKEY-PCB to LCD-I/F BLOCK to LCD-I/F BLOCK IrDA-I/F R68 is not mounted R42 is not mounted C53 is not mounted 3.68 MHz for Oscillator (Main Clock) 10.0 MHz for Oscillator (Main Clock) R9 is not mounted Gate Array R63 is not mounted...

  • Page 75: P686-Main (Power Supply)

    P686-MAIN (POWER SUPPLY) ON: Li-ion 3.4 V DC/DC OFF: Alka line SW102 is not mounted Alkaline Battery Detector 3 V Detector C136 is not mounted Frame grounding Li-ion Battery Detector Screw on the frame PCMCIA Detector R180 is not mounted C104 is not mounted Primary Circuit 3.4 V Regulator...

  • Page 76: P686-Main (Lcdm I/F)

    P686-MAIN (LCDM I/F) to LCDM-PCB to LED-PCB to LCDM-PCB CN203 CN202 CN201 CN200 C201 is not mounted LCD Power Circuit R226 is not mounted R34, R35 is not mounted C208 is not mounted C211 is not mounted CN206 to MROM-PCB CN205 TO Compact Flash —...

  • Page 77: P668-Mrom (Mask Rom)

    P668-MROM (MASK ROM) for OS for dictionary — 74 —...

  • Page 78: P686-Led (Led)

    P686-LED (LED) — 75 —...

  • Page 79: P686-Pwkey (Power Key)

    P686-PWKEY (POWER KEY) P686-2KEY (EL. CALB KEY) — 76 —...

  • Page 80: P686-Adp (Ac Adaptor)

    P686-ADP (AC ADAPTOR) P686-3PIN (3PIN I/F) — 77 —...
  • Page 81 CASIO TECHNO CO.,LTD. Overseas Service Division 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160-0023, Japan...

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Px-686

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