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Casio SF-8350, Руководство по обслуживанию и список запасных частей

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8. DISASSEMBLY (SF-8350)

1) To open display unit

1. Remove the key switch sheet from the display frame with care using a sharp tweezers and

remove 2 screws, then remove the display back cover.

2. Remove the blind plate of hinge and then release the 2 screws of hinge cover.

3. Release the 5 screws of display PCB and remove the display PCB.

Содержание SF-8350

Страница 1: ...SF 8350 LX 572 JUNE 1993 R without price...

Страница 2: ...3 Battery voltage detection 19 10 4 CPU pin description PD3055GF002 2BA 21 10 5 Gate array pin descriptions PD65005G 452 22 21 10 6 Power supply chip IC pin descriptions SC371015FU 21 10 7 Character...

Страница 3: ...1 1 SCHEMATIC DIAGRAM 1 1 Main Block...

Страница 4: ...2 1 2 Display Block...

Страница 5: ...3 1 3 Key Matrix...

Страница 6: ...teries Backup Power Supply One CR2032 lithium battery Power consumption 0 05W Battery life Main Approximately 120 hours Repeated cycle of 1 minute data input into Telephone Directory followed by 10 mi...

Страница 7: ...and fasten it in place using the screw B To replace the back up battery Before replacing the back up battery note the following precautions Do not remove the main batteries from the SF Unit while bac...

Страница 8: ...e will erase all data stored in memory including marked data items Be sure to perform the RESET operation only if you wish to clear all data To reset the SF Unit s memory 1 Switch on power and press t...

Страница 9: ...fore connecting the cable SB 60 or SB 62 be sure to reset the slave machine to clear all data Important You can not perform data communications with the CASIO SF A series of SF Units SF A10 etc Be sur...

Страница 10: ...smitting unit is in the Calender Display Telephome Directory Business Card Library Memo Mode or Schedule Keeper press the key followed by to select DATA COMMUNICATION and the following menu appears FU...

Страница 11: ...f Telephone Directory data Business Card Library data Memo data Schedule Keeper data and Calendar data If the customer s machine uses full memory it takes about one minute and ten seconds for this tra...

Страница 12: ...ion the display will appear as follows When the percentage of memory used reaches 100 you will not be able to enter any more data into memory 7 TO CHECK THE MEMORY CAPACITY The memory Capacity display...

Страница 13: ...witch sheet from the display frame with care using a sharp tweezers and remove 2 screws then remove the display back cover 2 Remove the blind plate of hinge and then release the 2 screws of hinge cove...

Страница 14: ...13...

Страница 15: ...RAM DATA BUS S112 S191 S32 S111 S0 S31 LCD 192 X 48 dots INTERFACE FOR DATA TRANSMISSION DATA RECEPTION OPEN OFF LOCK ON MSM6585AV Z 358B LCD DRIVER LCD DRIVER LCD DRIVER MSM6585AV Z 358B MSM6585AV Z...

Страница 16: ...n45 Pin36 L Pin29 Pin39 Pin30 4 3 13 6 10 1 System chart Generally SF 8350 is working with the following steps 10 Output H from V2ON terminal 12 Output all LCD drive voltages 11 Output H from VOT term...

Страница 17: ...4 7 V is less than 4 6 V When the batteries voltage When the batteries voltage is more than 4 5 V is less than 4 4 V V COMP 2 VSS VREG 3 5 6 4 V1 3 4 3 1 V2 2 5 1 7 V3 1 5 3 6 V4 2 5 4 9 10 2 Power su...

Страница 18: ...n switch signal from terminal SWO Also gate array will send H signal to release the INT0 terminal of CPU from LSO terminal The terminal CSB is for the chip select of gate array This signal is sent fro...

Страница 19: ...signal to VIN terminal of gate array from V2ON terminal Then gate array will send H signal from VOT terminal to release interruption signal INT1 of CPU and also it will be sent to PDB terminal of pow...

Страница 20: ...4V Less than about 4 6V Pin32 10 3 Battery voltage detection The power supply IC chip SC371015FU has two kind voltage detection circuit in it Accord ing to the batteries input voltage the detection ou...

Страница 21: ...7 KC0 KC11 Out H Pulse Key common signal output 66 GND In L L GND terminal 68 INT2 In H H Interrupt signal from ROM Character generator 69 INT1 In L H Interrupt signal from gate array 70 INT0 In H H I...

Страница 22: ...OM In H H VDD terminal 39 VDD In H H VDD terminal 40 SWO Out L L Main switch control signal 41 BCN In H H BCON signal from CPU 42 MDP In H L MDP2 signal from CPU 43 OEO Out L Pulse Read signal for IC...

Страница 23: ...6 OSI OSO In Pulse Pulse External clock terminal 32 768 KHz 13 TNL Out Not used 14 19 IN1 IN2 In H H Connected to VDD 15 32 VSS1 VSS2 In L L GND terminal 16 21 IN1 IN2 In H H Connected to VDD 17 22 O...

Страница 24: ...6 VSS Power GND GND GND terminal 22 CS1 In H Pulse Chip selection terminal 1 24 OEB In H Pulse Output enable terminal 29 WEB In H Pulse Write enable terminal 30 CS2 In H H Chip selection terminal 2 32...

Страница 25: ...rom the list on screen The each test can be selected by the following function keys TEL key Test the LCD display Business card key Test the IC memory chip and the RTC MEMO key Test all keys SCHEDULE k...

Страница 26: ...esults MEMO key Dump contents of memory direction depens on setting of internal extarnal switch SCHEDULE key Call up checksum and XOR values for connected ROM RAM data CALENDAR key Bring up clock disp...

Страница 27: ...X XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX MEMORY DUMP Type ROM and RAM are shown However if the ROM is not in standard Casio format a format err...

Страница 28: ...ine before setting the receiving unit To release communication press ESC button In this case the break code is sent to receive units Therefore both machines display TRNS BREAK and communication will b...

Страница 29: ...display will be off mode auto power off mode TRNS ERROR NOTE As diagnostic program area does not have all ASCII code to display a reception data some charactor will be changed to other charactor For e...

Страница 30: ...contact Reset operation Yes Repair section 1 For no key input problem Pin 2 of SC371015FU Approx 4 5 V Poor connection Solder line No Replace parts Yes 1 Pin 24 of PD65005G 452 22 L Poor connection S...

Страница 31: ...in 29 of PD65005G 452 22 H Pin 30 of PD65005G 452 22 H Pin 31 of SC371015FU H 1 Yes Yes Yes Yes Yes Solder line No Replace parts Yes 1 Pin 35 of PD65005G 452 22 L Poor connection Solder line No Replac...

Страница 32: ...5FU 1 Replace parts No Poor connection or cut of heat seal cable Yes Replace heat seal 1 Poor connection on LCD driver Yes 1 Solder line Poor connection or cut of heat seal cable for LCD Replace heat...

Страница 33: ...32 13 PARTS LIST SF 8350...

Страница 34: ...33...

Страница 35: ...34 14 PCB VIEW SF 8350...

Страница 36: ...35 15 ASSEMBLY VIEW SF 8350...

Страница 37: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926...

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