Casio SF-8350 Service Manual & Parts List Download Page 15

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— 14 —

C0~C47

CPU

ROM

(Character Generator)

(Operation Program)

HD62063B01

POWER SUPPLY

CHIP FOR LCD

SC371015FU

GATE ARRAY

PD65005G-452-22

Power supply circuit

CARD LOCK SWITCH

FREE (OFF)

LOCK (ON)

VDD

GND

TX, RX

LCD DRIVE VOLTAGES

V1 ~ V4, VREG

TO KEYBOARD

RAM

DATA BUS

S112~S191

S32~S111

S0~S31

LCD

192

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-358B

MAIN SWITCH

RAM

9. BLOCK DIAGRAM

CD401-TS

PD3055GF002-2BA

PD23C4001EBGW-301

HM62L864LFP-12MRL

PD43256AGX-

10/12/15LL

X 2 PCS.

NOTE: There are two types of the RAM chips:

1. Using 1pc. of HM62L864LFP-12MRL

2. Using 2pcs. of

PD43256AGU-10/12LL

N O T E

Summary of Contents for SF-8350

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

Page 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...

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

Page 4: ...2 1 2 Display Block...

Page 5: ...3 1 3 Key Matrix...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 14: ...13...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 34: ...33...

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

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

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

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