Page 2 - CONTENTS; CIRCUIT EXPLANATIONS
CONTENTS 1. SCHEMATIC DIAGRAM ................................................................................................ 1 2. SPECIFICATIONS ......................................................................................................... 5 3. TO REPLACE THE BATTERY ......................
Page 3 - SCHEMATIC DIAGRAM; Main PCB
Page 4 - Display PCB
Page 5 - Key Matrix
Page 6 - SPECIFICATIONS; Operating temperature: 0
— 5 — 2. SPECIFICATIONS Data storage:Telephone/business card/memo/schedule data storage/recall, calendar display, marker, phrase memory,secret area, editing, capacity display, auto display Clock:Average of accuracy ± 3 seconds per day under normal temperatures; worldtime, schedule alarm, daily alarm...
Page 7 - TO REPLACE THE BATTERY; A) To replace the main batteries; Replace the battery holder.
— 6 — 3. TO REPLACE THE BATTERY A) To replace the main batteries Before replacing the main batteries, note the following precautions. • Do not remove the back-up battery from the SF Unit while main batteries are removed. • Be sure to replace both batteries at the same time, and do not use an old bat...
Page 8 - ERROR MESSAGE; The following procedure will erase
— 7 — Message Meaning Action DATA ITEM NOT Text specified for Correct or change FOUND! search does not exist. specified text. PASSWORD Wrong password Enter correct MISMATCH! entered. password. MEMORY FULL! No more room in Delete unnecessary memory for storage of data items from data. memory. DATA ER...
Page 9 - TO SAVE THE DATA TO OTHER MACHINE
— 8 — Following the RESET operation, the Home Time Display appears. The initial settings of the SF Unit afterreset are shown below. HOME TIME: Washington D.C.JAN/1/1994 (SAT)12:00 AM12-hour format WORLD TIME: New YorkDaily Alarm: 12:00 PM Sound: Schedule alarm ON Daily alarm OFF Key ON Character inp...
Page 10 - and; NONE
— 9 — To change the hardwareparameters, press the , , and cursol keys. HARDWARE PARAMETERS PARITY EVEN ODD NONE BIT LENGTH 7 bits 7 bits 8 bits BPS 1200 2400 4800 9600 TEL 2 Press to select "RECEIVE" and the following display appears to indicate that the slavemachine is ready to receive data...
Page 12 - key pressed on transmitting or receiving unit.; TO CHECK THE MEMORY CAPACITY; There are two types of Memory Capacity Display, as shown below:; SPREADSHEET: Total memory used for storage of Spreadseet data.
— 11 — Message Cause STOPPED ! • ESC key pressed on transmitting or receiving unit. • Memory area of receiving unit full.• Battery power drops below a certain level. TRANSMIT ERROR ! Cable connection broken or abnormal noise in cable. MEMORY FULL ! Memory area of receiving unit full. 7. TO CHECK THE...
Page 13 - ) To open display unit; remove 2 screws, then remove the display back cover.
— 12 — 8. DISASSEMBLY (SF-8500) 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 sc...
Page 14 - ) To open battery cover and back cover; GND
— 13 — 2) To open battery cover and back cover 1. Release the one screw of battery cover and remove the battery cover. 2. Remove the batteries. (Refer section 3 in this manual.) 3. Release the 8 screws of the back cover. Then, remove the back cover. 4. To check the circuit by oscilloscope, apply the...
Page 15 - GATE ARRAY; LCD; RAM
— 14 — C0~C47 CPU ROM ROM (Character Generator) (Operation Program) HD62063B01 POWER SUPPLY CHIP FOR LCD SC371015FU GATE ARRAY µ PD65005G-566-22 Power supply circuit VDD GND LCD DRIVE VOLTAGES V1 ~ V4, VREG TO KEYBOARD DATA BUS S112~S191 S32~S111 S0~S31 LCD 192 × 48 dots INTERFACE FOR DATA TRANSMISS...
Page 16 - VDD; Generally, SF-8500 is working with the following steps.; CIRCUIT EXPLANATIONS; CPU; ROM; Gate array sends ROM output
— 15 — VREG,V1~V4 Output for LCD driver PDB Power supply chip SC371015FU VDD2 VDD1 VO1 GND (Pin2) (Pin1) (Pin19) (Pin31) VIN GND VDD VDD VOT KAC KIO ADDRESS BUS 2 MHz VDD1 ON MAIN SWITCH SW GND VDD (Pin53) (Pin54) (Pin41) 2 VDD (Pin69) "H" "H" ADDRESS DATA "H" VDD 1 "L...
Page 17 - ) Power supply circuit for ROMs; The voltage of the ROM (LSI6) is supplied from the VCC lines.; Main switch; There are three detectors of the main batteries in the circuits.
— 16 — 10-2. Power supply circuit 1) Power supply circuit for CPU, GATE ARRAY, CG ROM and RAMs. When the memory back-up battery or main batteries are set, the voltage supplies at the terminal VDD1 (Pin No.1) of SC371015FU (LSI2) through the diode MA743 (D1). When LSI2 receives a voltage, the regulat...
Page 18 - Others
— 17 — When the voltage from the main batteries becomes +3.7V ± 0.1V, the terminal VCOMP0 (Pin No.5) of the power supply chip (LSI2) becomes "L" level, then this signal goes to the terminal PDN (Pin No.28) of the GATE ARRAY (LSI3). After this, the terminal VOT (Pin No.32) of GATE ARRAY (LSI3...
Page 20 - Gate array
— 19 — LSI MON SWO LSO " L " " H " GND VDD CSB " H " FROM CPUCS2 terminal (Pin 28) (Pin 25) (Pin 26) (Pin 40) (Pin 24) TO CPU TO MAIN SWITCH "L" "H" OFF ON SWO SW CPU GATE ARRAY MAIN SWITCH VDD "L" "L" KAC KIO (Pin36) (Pin40) (Pin54) (Pin53) PO...
Page 21 - 0) Power supply for LCD
— 20 — VDD VOB DATA ADDRESS HD62076C02 CPU VCC " L " VDD R10 (Pin3) (Pin1) (Pin2) VOT VIN "H" V2ON INT1 CPU PDB SC371015FU (Pin45) (Pin31) (Pin32) (Pin31) LCD drive voltages VREG,V1~V4 When the system is start up, CPU will send "H" signal to VIN terminal of gate array from V2...
Page 26 - DIAGNOSTIC OPERATION
— 25 — SPREADSHEET key : Lights on dot at corners TEL key : Lights on in all dots (black screen) BUSINEESS CARD key : Checker displayMEMO key : Reverse checker display SCHEDULE key : Lights on dot along the screen edge (frame) 11. DIAGNOSTIC OPERATION SELECT MENU 1 DISPLAY2 MEMORY3 KEY4 BUZZER5 I/F ...
Page 28 - KEY; Note: The Internal/External switch is activated; TM DISP
— 27 — KEY 1 RANDOM2 AUTO 3) CHECK SUM When memory dump is operated by pressing BUSI-NESS CARD button, a display will appear as shownat left. The first two lines, begining from the top left,signify the following address values in reference tothe one megabyte "E0" area:00001,00002,00004,....,...
Page 30 - Battery level check
— 29 — Main battery Break display (Broken transmission) The memory back up voltage detector detects anyirregularity in voltage, the machine goes into anerror state and the display is as shown at left figure.To release this display, press any key. When the main battery voltage detector detectslow bat...
Page 31 - Generally, check the machine with the followning steps for repair.; Repair section 1 : For no key input problem
— 30 — Generally, check the machine with the followning steps for repair. Main battries 6V? Key input OK? No Save data to P/C if necessary. Current consumption OK? Follow repair section 2. Follow repair section 3. No Replace main battries (CR2032 2pcs.) Display OK? Load data from P/C if necessary. Y...
Page 33 - Repair section 3 : For memory problem; Repair section 2 : For no display or wrong display problem
— 32 — Poor connection? Solder line No Replace parts. Yes 1 Pin 31 of SC371015FU "H"? Solder line Yes Pin 32 of µ PD65005G-566-3B6 "H" ? 1 LCD drive voltages OK? (Pin8~12) of SC371015FU Yes Poor connection on chipresistors R8~R10 ? Poor connection? No Poor connection oncapacitor C7~C...