APM Service Manual
Contents
1. DIGITAL WEIGHING BENCH SCALE NTEP APPROVED VERSION CONTENTS 1 INTRODUCTION 2 5 5 2 1 SYSTEM BLOCK DIAGRAM 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION 2 3 GENERAL SPECIFICATIONS 3 INITIAL SETUP 1 INTERNAL FUNCTION AND SETTING METHODS CALIBRATION DISABLE CALIBRATION AND INTERNAL FUNCTIONS SETTINGWITH JUMPER OFFSET AND SPAN VALUE DATA FLOW CHART w Co CO CO LI 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 5 ELECTRICAL CIRCUITRY 9 1 SCHEMATICS os BED LAYOUT 6 BILL OF MATERIAL 7 APPENDIX AUGUST 2002 REV 4 Specifications and Function Subject to Change without Notice 1 INTRODUCTION series is designed programmed according the Class III requirements This Scale is sealed t prevent unauthorized access to internal parts ke any trouble shooting Ander users should be advised not to undertah except those listed on the operation manual rmation that may result this manual to any end This maintenance manual contains of certain inf in fraudulent use Do not release any part of users Or nt un authorized The internal jumper 0 1 should be so set to preve settings or alternations Should a load cell has been replaced make sure that the protection devices are properly set After servicing it is necessary to go th2. Press MODE When 2nd point calibration is done Scale will display load weight and is ready for operation Oy Ae 13 12 12 14 3 3 DISABLE CALIBRATION AND INTERNAL FUNCTIONS SETTING WITH JUMPER The JP1 is used to control calibration and internal functions setting F landF 3 move this jumper to CAL LOCK position to disable calibration and internal functions setting 12 3 4 OFFSET AND SPAN VALUE DATA OFFSET AND SPAN VALUE DATA TABLE Model Offset Value Span Value Thousand SPESE Control Control Thousand during calibration peur READING OFFSET VALUE 1 Turn scale off 2 Remove all load from platter 3 Enter F 1 and read the offset value READING SPAN VALUE 11111 scale off Remove all load from platter Enter F 1 Press Apply load to platter Span value according to load applied will be displayed A CO FS HOW TO ADJUST OFFSET VALUE In case the offset value is out of range change the resistors R1 R2 to obtain correct offset value HOW TO ADJUST SPAN VALUE The spanvalueiscontrolledby resistor locatedonR9 standardresistor value of 15 listed on the above table If the required span value is not attained then change R9 resistor according to either case below Span value too low Decrease the resistance of Span value too high Increase the resistance of 1 2 14 PRESS MODE DISPLAY 00 00 kg ENTER THE CALI
3. m N FP P gt A1515 5V 90 cm 2 100uF 16V 1042 1 1 7 10KO 7 4 7 1 4 130 0 44 mm AD7705AN OP177 AS2950AW 22uF 16V 226 luF 63V 105 1042 300 50 7 30 100pf 50V 101 10 1 4 1 5 1 4 1 7 1 7 4 7 1 4 1000 1 4W 10 1 5600 DSS 306 55Y58471M100 4 9152MHZ 7105 52 1 UPPER 7705 52 1 UNDER M3 6 BACK LIGHT OPTION TRANSISTOR BACK LIGHT INVERTER CAPACITOR EC CAPACITOR MLC CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR BACK LIGHT EL 0401015150 1401005000 0701107016 0730104050 0805041102 0805041103 0805041472 1400000006 A D SECTION T VOLTAGE REGULATOR CAPACITOR TC POLYESTER FILM CAPACITOR MEF CAPACITOR MLC CERAMIC CAPACITOR CC CERAMIC CAPACITOR CC METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR EMI FILTER CRYSTAL PROTECTION BOX PROTECTION BOX SCREW A0203077050 A0206000072 A0207029500 0702226016 0713105063 0730104050 0740030050 0740101050 0803041002 0803041501 0803043001 080304 0804044701 0805041101 0805041103 0805041561 1008000001 1100249152 00117172 0015000013 20010000305 30 CI BRI 11 02 01 2 3 Jl RA4 RO R1 R3 R
4. from 2 V for low threshold LG Ds and up to 9 V for quest host LCDs and high threshald automobile twisted nematic LC Ds Low power consumption Power saving mode for extremely low power consumption in battery operated and telephone applications 5 interface e TTIL CMOS compatible Compatible with any 4 bit 8 0 or 16 bit micropracessors micracontrollers 3 ORDERING INFORMATION TYPE NUMBER i NAME DESCRIPTION VERSION 50 100 1 1 8576 plastic very small outline package 56 leads CC CHR RE PCF8576U 2 chip with bumps in tray chip on film frame carrier FEC hip with bumps on fim frame carter F L 2001 Oct 02 3 36 29 3 05 5 6 PITCH 15 8 5 79 0 OJ PITCH 15 8X4 63 2 DU NOT SCALE THIS DRAW G289 17 0 REv DATE BY 5 DWG ea TOMER U W E SCALE UNIT DATE APPROVAL CHECK DRAWN 0 18 EJES 26 0 36 7 NP Oy WW 1 2 OLINA 5 4 681 AT EO NMS AZ T L 17 0942 1 1 0 SM 1 om NOWWDI ums ER Os
5. 07130702209 TT bena E gt O CO E 0 d 1 1 12 1 1 1 1 1 1 1 2 N N 2 24 0 1 E 4 3 6 1 8 2 0 3 20 6 16 Es BB 32 5 8958 8 Micro controller with 32KB flash amp 1 RAM embedded Features Working voltage 3 0V 3 6V For L Version 4 5V 5 5V For C Version General 8052 family compatible 12 clocks per machine cycle 32 KB internal flash memory 1024 bytes data RAM 3 16 Four 8 bit I O ports for PDIP package Four 8 bit ports 4 bit I O ports for PLCC or QFP package Full duplex serial channel Bit operation instruction Page free jumps 8 bit unsigned division 8 bit unsigned multiply BCD arithmetic operations Direct addressing Indirect addressing Nested interrupts Two priority level interrupts A serial port Power save modes Idle mode and power down mode Code protection function One watch dog timer VVDT Low EMI inhibit ALE Taiwan 4F No 1 Creation Road 1 Science based Industrial Park Hsinchu Taiwan 30077 TEL 886 3 579 2926 886 3 579 2988 FAX 886 3 579 2960 886 3 578 0493 SyneMOS Technologies Inc May 2001 Product List SM8958L25 25 MHz 32KB internal memory MCU SM8958C25 25 MHz 32KB internal memory MCU 5 8958 40 40 MHz 32KB interna memo
6. 1 The AD7705 AD 7706 consumes less than 1 mW at 3 V supplies and 1 MHz master clock making it ideal for use in low power systems Standby current is less than 2 The programmable gain input allows the AD7705 AD7706 to accept input signals directly from a strain gage or trans ducer removing a considerable amount of signal conditioning The AD7705 AD 7706 is ideal tor microcontroller or DSP processor applications with a three wire serial interface re ducing the number of interconnect lines and reducing the number of opto couplers required in isolated systems v 1 The part features excellent static performance specitications with 16 bits no missing codes 0 005 accuracy and low rms noise 600 nV Endpoint errors and the effects of temperature drift are eliminated by on chip calibration op tions which remove zero scale and full scale errors Technology Way Box 9106 Norwood 02062 9106 5 Tel 781 329 4700 World Wide Web Site http www analog com Fax 781 326 8703 Analog Devices Inc 8 FEATURES AD7705 Two Fully Differential Input Channel ADCs AD7706 Three Pseudo Differential Input Channel ADCs 16 Bits Missing Codes 0 003 Monlinearity Programmable Gain Front End Gains from 1 to 128 Three Wire Serial Interface SPI QSPI MICROWIRE and DSP Compatible Schmitt Trigger Input on SCLK Ability to Buffer the Analog Input 2 7 V to 3 3 V or 4 75 V to 5 25 V Operation Power
7. 10 5 PIN 10 9 PIN 6 WAFER 1 3 180 8 PIN ZIF SIP 1 13 FEMALE PITCH 2 54 3 5 6 0 8m 11 0592MHZ OBO 15210 PM 11 2 MAINBOARD ECL Ba Tits D uen az VOLTAGE REGULATOR TEC L C SOCKET TRANSISTOR TRANSISTOR DIODE CAPACITOR EC CAPACITOR EC CAPACITOR EC CAPACITOR MLC CAPACITOR MLC CERAMIC CAPACITOR CC CERAMIC CAPACITOR CC METAL FILM RESISTOR METAL FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR RESISTOR NETWORK RESISTOR NETWORK CONNECTOR CONNECTOR CONNECTOR SOCKET STRIPS MINI JUMPER FERRITE BEAD CRYSTAL BUZZER EOPMOO00030 A0102000289 A0201089521 A0202093461 A0205040270 020 012 A0208085760 A0300000040 A0401007330 A0401015150 A0501004148 A0701106017 A0701107016 0701477016 0730104050 0730104050 0740030050 0740101050 0804041503 0804045003 0805041101 0805041102 0805041103 0805041105 0805041153 0805041205 0805041223 0805041272 0802010305 0802010309 0901010060 0907010030 0910000080 0910100130 0910111020 1005030512 1100211059 1500000004 3 48 49 R41 R55 R40 EL1 U3 Ul 2 04 CFO C7 22417122 CSES R 7 8 R12 R11 R9 SPAN R3 6 R10 R13 14 R16 R15 EMI1 3 X2 29
8. 5VA EMI2 055306 471 EMI3 055306 471 C62 C63 1042 1047 ET E S S VIN GND J4 CON 6P WF 7 5 1 5 5VA E C17 1042 mee 5VA gt S Os 5 5 82 23 gt VIN TQ BATTERY 10 t DATE 08 13 1997 DRAWING 20 SHEET JXXON SP WNF R1 470R 0 7 Revision 1 1 2 LAYOUT E COMPONENT SIDE 1 11 2 LAYER ES 6 830102 py 6 000000 e OO a 11 2 BOTTOM LAYER 24 ie P5 INT SCK P17 DATA INTO DRDY AN vi END V E 5 5 4 E E S S VIN GND AD7705 52 1 C20 R37 caa Car 044 U8 R35 6 E COMPONENT SILK SCREEN 11 PM 11 2 90 11 19 NR3 C55 C57 653 lt D2 C48 5552 656 09 J2 R40 R55 R32 U10 U7 C33 AM z 2 JP1 1 o 00 1 0 11 2 TOP
9. 8 4 2 e 7 8 9 J3 ZIF 8P 125MM C55 C56 C57 658 059 060 TO KEYBOARD 100P 100P 100P 100P 100P 100P e na e 5V 4 4 RXD 4 0 5 1 5 5 5 ELECTRICAL CIRCUITRY 22 U11 AIC1722 50CZL 78 100uF C27 100uF 026 1047 2027 27 VIN 500 R29 EN 2 7 5 03 5 AD7705 rer AIN2 C9 1 1047 CS C10 10K 14 22uF 16V TC 7 DIN 1 DOUT 7 AIN1 AIN1 DRDY INTO 5 9 SCLK _ INT1 10 REF ul F REF 3 di OUT F C13 C14 C15 tur MEF poe RIO 1042 2 HOH 100P 100P 100P 100R 4 9152MHz C11 C12 scr AIN1 ET ANA V Title 5VA EE PM POWER amp AD CON 6P WF Drawing Revision 11 2 17 DATA INTI SCLK Size Sheet 2 of 2 Date 90 11 30 Drawn by ls 6 7 e 9 5 87 10K MF Rg SPAN R8 10K MF C23 1047 AUTO OFF 621 1042 622 1047 5 R22 1M R3 4 7 C4 1042 VIN
10. EM when not in MODE 18 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP POWER DISPLAY RANDOM FIGURE CHECK POWER SUPPLY CHECK CPU TCD CPU LCD KEY BOARD LCD DRIVER TC SHOW 00000 COUNTS AND IHEN ZERO CHECK LOAD CELE A D UNIT OFFSET VALUE GHOST UNSTABLE PROPER READOUT CHECK POWER CHECK PLATTER SUPPE DRIVER LC 24 29 CELL A D UNIT BAD SOLDERING CAN T REACH THE LNCOREKECT FUL CAPACITY CORRECT READOUT RE CALIBRATE CHECK PLATTER THE SCALE STOPPER LOAD F SET VALUE NORMAL OPERATION 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 4 2 1 Power Supply Checking 4 2 1 1 Relevant parts Main Board PM 11 X Ol 121212 OZ A733 05 IC 4027 OLE CAES 142 25 0 VIN gt C20 470U 16V R20 1 SWI lt 3 SW2 gt R22 Description 1 Power source Rechargeable Battery 6V 4Ah or constant DC6V source Utt AIC1722 50CZL C28 1 3 100uF 16V VI VO GND dE 1 01 C27 Atals 100uF 16 5 1047 C26 2 1042 1 1 5V Q2 AAA 2 LOBAT R29 2 7K 2 5 power drives analog and digital circuit system Ull AIC 1722 5 0 is a bvolts Voltage Regulator 3 AULO OTEf If the scale is set by 4 oFF of power saving function or under LO BAT situation after fixed time interv
11. OVERLAY 33835 430102 S II M93 8 08 r3 PM 11 2 BOTTOM OVERLAY 2 6 OVERLAY PM 20 2 gt Q 20 2 LAYER 20 2 Qty Remark FOR WIRE ARRAY 21 e e P P mp F d np o e e e e e e HKH H Specification BW SERIES GRAY BW SERIES WHITE BW SERIES BW SERIES M4 OPENINGS BW SERIES 5MM OPENNINGS 1022 OR EQUIVALENT BW SERIES 6V EM SERIES GRAY 21 BLACK ZLem RED 10 20 30 5mm BW SERIES o PIN PLI IO5 P BW SERIES L SHAPE NYLON GRAY PM SERIES BW SERIES PLASTIC WC 1 FOR PILLAR SUPPORT BW SERIES 25mm x 475mm 2 aim FOR OPTIONAL PARTS SERIES BW SERIES 6 PIN PLI 165 R T 29 297 13 9 12 5mm 6 PIN 40cm BW SERIES 9KEY BW SERIES 119 40 5 1 BW SERIES GRAY BW SERIES WHITE BW SERIES PM SERIES PM 11 2 MAINBOARD PM 20 2 POWER BOARD IV s00mA 6 BILL MATERIAL STRUCTURE Parts No Description G0001BW1000 PLASTIC HOUSING BASE G0001BW1100 PLASTIC HOUSING UPPER G0002BW1000 PLASTIC PLATTER F0003BW1001 L C ALUMINUM LOWER SUPPORT F0003BW1000 L C ALUMINUM UPPER SUPPORT A0071000 LOAD CELL G0005BW1000 PLATTER BEARING RUBBER A1600060400 RECHARGEABLE BATTERY 0009 0002 41205010210 CONDUCT
12. 2 ZD1 Q1 P n 20 2 0 uF 50V 1042 1104 1A 1N4148 280945 810616 08 0 733 SCD 022 BLACK 1 5 1 4W 22003 4700 1 20 1000 1 2 1 24 8 2 923 8 2 04 0 M3 x 8 M3 PM 20 2 POWER BOARD ECB CAPACITOR MLC BRIDGE RECTIFIER RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR DIODE TRANSISTOR TRANSISTOR TRANSISTOR D C JACK CARBON FILM CARBON FILM CARBON FILM CARBON FILM CARBON FILM ZENER DIODE HEAT SINK SCREW NUT 0 010000 0730104050 0502000001 0501004148 0401009450 0401010610 0401007330 0906000220 0805041153 0805041221 0805041471 0805020120 0805021101 0503020082 0504000002 20011000308 20016000003 di 23 7 APPENDIX PARTS EXPLOSION DESCRIPTION EOD CELL CAPACITY 20kg ars POM CELL CAPACITY 35kg CELL CAPACITY PISO ap CELL CAPACITY 200099 i CIBW1000000 PANEL BW SERIES l119x40 5xlmm PLASTIC HOUSING BASE 00 PLASTIC SUPPORT 000000 RECHARGEABLE BATTERY BATTERY COVER KEYBOARD 0102000289 ci ke Merre 0905600600 CONNECTOR 5 PINTELI 166 K 1206060001 CANAL CABLE S 0 20 50
13. 8500 gt lt lt lt lt y 5 AS lt 1799996 lt 6 11 6 5 4 3 2 1 4 40 251 1 PO 4 AD4 38 POS ADS 37 6 361 PO 7 AD7 35 EA VPP 341 4 1 ALE 321 10 33 P2 7 A15 30 4 P1 5 P1 6 RES RXD P3 0 L P4 3 TXD P3 1L SM8958 ihhJ 44L PLCC Top View INT1 P3 3 15 TO P3 4 15 1 5 117 20 21 22 23 25 26 294 2 5 13 T1 P3 5 m 2 5 13 JOU OUOU OU OUUU U L CRENTO O Q EN WU 555 N 0 O ak x S gt Ly EEE x EFE 8 ESS G x x ENNAN lt fon 2 1 0 VDD T2EX P1 1 PO 0 ADO 12 1 1 P13 P0 2 AD2 P14 0 4 404 1 5 0 5 405 1 6 PO S ADS P1 7 PO 7 AD7 EA VPP RXDIP3 0 ae TXDIP3 1 y 8 ins INTO P3 2 U INT1 P3 3 TO P3 4 2 6 14 1 3 5 2 5 13 WRIP3 6 2 4 12 7 P2 3 A11 XTAL2 P2 2 A10 XTAL 1 P2 1 A9 VSS 2 0 8 Specifications subject to change without notice contact your sales representatives for the most recent information 2 19 Ver 1 1 PID 8958 05 01 34 SyneMOS Technologies Inc 5 8958 2001 Block Diagram Decoder amp Timer 2 Timer 9 Pointer Register AM B
14. A D Converter AD7705 When no error is found with the above checking procedures the trouble can be caused on the load cell or the PCB itself Replace a new one could be better to identify the defective In this way the readout of weight would be varied because of the output voltage of load cell and different span value so re calibration is required after this replacement 20 Al 4 5 6 7 8 9 ae C43 C44 100P 100 UB o 85780 COM 0 3 UJ P13 9 2 50 539 SEGLIO 18 P14 RSE AVY OR 4 550 538 SYNC 7 5 5 C45 5 1050 534 950046 142 1047 4110 533 DO GND p ea 532 0 5 2 31 EE Us B CS 45V 24 100 528 18 0 527 5 COMLO 3 5 228 V pu CAL BP3 524 LCD G289 CAL CO 5 322 CAL LOCK 8151 ADJ 1 PP I 55 518 S6 517 SEGL00 07 T a an SEG 17 21 NR1 58 514 5 6 00 11 en 312 211 P13 P
15. BRATION WEIGHT PRESS MODE DISPLAY YE S DISPLAY LOAD DISPLAY REQUIRED LOAD PLATTER CORRECT WEIGHT YES XXXX ASSIG NED WEIGHT DISPLAY YES DISPLA Y 00 OO kg ENTER THE CALIBRATION WEIGHT PRESS MODE DISPLAY LOAD DISPLAY ASSIGNED WEIGHT PLATTER CORRECT WRIGHT 5 DISPLAY CAL _2 2nd POINT CALIBRATION NO PRESS WEIGHT STILL ON THE PLATTER DISPLAY on FLOW CHART Calibration PRESS MODE amp ON OFF RELEASE ON OFF KEY DISPLAY CAL 1 RELEASE KEY PRESS MODE OR ZERO KEY CALIBRA TE NO DISPLAY 199999 DISPLA Y 00000 DISPLAY lt 0 STANDBY FOR OPERATION 1 3 9 3 3 CALIBRATE MODE YES ZERO NO 3 5 2 Function Test for technicians only START PRESS TARE amp ON OFF RELEASE ON OFF KEY RELEASE KEY 5 DISPLAY 99999 COUNTDOWN DISPLAY 00000 y TARE 2 STANDBY FOR OPRR ATION 16 DISPLAY xxxx Show offset 77777 A D gt 3 counts 7 PUT ON THE ASSIGNED WEIGHT L C D PANORAMIC VIEW DISPLAY SPAN VALUE NO YES 157 other ET MANE A uto shut off
16. Dissipation 1 mW max 3 V Standby Current 8 max 16 Lead 16 Lead SOIC and TSSOP Packages GENERAL DESCRIPTION The AD7705 AD 7706 are complete analog front ends for low frequency measurement applications These two three channel devices can accept low level input signals directly from a trans ducer and produce serial digital output They emplov sigma delta conversion technique to realize up to 16 bits of no missing codes performance The selected input signal is applied to a proprietary programmable gain front end based around an ana log modulator The modulator output is processed by an on chip digital filter The first notch of this digital filter can be programmed via an on chip control register allowing adjustment of the filter cutoff and output update rate The AD7705 AD7706 operate from a single 2 7 V to 3 5 V or LTS V to 5 25 V supply The AD 7705 features two fully differ ential analog input channels while the AD 7706 features three pseudo differential input channels Both devices feature a differ ential reference input Input signal ranges of 0 mV to 20 mV through 0 V to 2 5 V can be incorporated on both devices when operating with a Von of 5 V and a reference of 2 5 V They can also handle bipolar input signal ranges oft 20 mV through 2 5 V which are referenced to he AIN inputs on the AD 7705 and to the COMMON input on the AD7706 The AD7705 AD7706 with 3 V supplv and a 1 225 V reference can handle unip
17. I CAL INTO INT1 5 INI pu P 03 INVERTER 601 PW amp AD r 1K Y OUT NAN LOBAT LOBAT 2 P17 P17 N INT1 E INTO 2 NTO DRDY s AUTO OFF gt JLAUTO OFF GND i 1 2 40 4 7K 8611 LO BACK LIGHT OPTION U6 15V LM75 50 Title 3 3 vec 2 4 at PM MAIN 1 GND AZ idis Drawing Revision PM 11 TEMPERATURE 1 OPTION 2 Size AS Sheet 1 of 2 Date 90 11 30 Drawn by 4 5 7 8 9 5 C39 1QuF 16V 1 C41 is 1047 T CAL AUTO OFF 14 P13 25 24 P23 P22 P21 P20 DI 1 4148 20 21 22 23 02 114148 4 25 2 CON 4P WF TO RS 232 17 6 3 4 2 1 RS232 OPTION X1 U7 5 11 0592MHz 89052 C33 19 40 AU VDD T 034 T 8 238 S E 30P AIRES P17 8 10uF 18 I P16 RESET P15 P14 P13 33 P12 C40 57 00 1047 36 107 32 04 28 33 205 27 7 37 P06 P26 I 7 P25 25 5V 17 24 24 6 R2 025 23 WR 82252 5 IS 871 86 20 0 08015210 INT CE SATT 0 CES INTO 29 TXD 11D ALE PROG RXD EA VPP R3 45V 10K 5P de 213145 Swi sw2 9
18. IVE WIRE A1205010212 CONDUCTIVE WIRE A1206060001 SIGNAL CABLE 6 WIRES COILED A0905600601 CONNECTOR G0004BW1000 ADJUSTABLE FEET G0003PM0001 PLASTIC SUPPORT F0002PMO000 S S PLATTER COVER G0030BW1000 PILLAR SUPPORT A5001000700 CABLE MOUNTING PLATE G0030BW1001 PILLAR SWIVEL BASKET F0004BW1000 S S PILLAR TOO10000025 HEXAGON SCREW DRIVER Z6BW1000010 PACKING BOX 0000000 OPERATION MANUAL Z6BW1000000 PACKING CARTON A0905600600 CONNECTOR A1007000004 FERRITE CODE A1202060401 WIRE ARRAY SINGLE HOUSING BOBW1000000 KEYBOARD C1BW1000000 PANEL PC G0001BW1001 PLASTIC HOUSING UNDER G0001BW1101 PLASTIC HOUSING UPPER G0004BW1100 RUBBER PAD C1PM0030 OVERLAY PC 1 0000030 P C B KIT 1 0010000 P C B KIT AK 01 039 59 27 28 20 C21 26 C40 42 C45 46 262 263 33 54 Clo C43 44 C55 60 R26 R27 R35 36 R20 R25 R32 R24 R31 R38 R22 23 R37 R21 R28 R29 NR3 NR1 J4 JE J3 LCD1 JP1 2 9 1 21 2 8 P P gt N N FP RP r CO GC e N FP mp 11 2 6289 89C52 93C46 4027 AIC1722 50CZT PCF8576CT 40 PIN A733 31515 154148 10uF 25V SS 100uF 16V 470uF 16V 1042 1042 300 50 30 100pf 50V 101 150 1 4W 500 1 4 1000 1 4W 1 1 10KQ 1 4W 1 1 15 47 2 1 22KO 2 7
19. al CPU will release a low to high pulse signal to toggle 05 then 01 cuts off scale will be shut down immediately 4 Low Power Detection The Q2 C945 is designed to detect the power level When battery powerislessthan5 5V thecollectorpolewillbecome lowpotential then CPU will instruct LCD display to show LO BAT symbol 4 2 1 2 Input voltage 5 5V or higher Check and recharge battery if voltage less than 5 54 4 2 1 3 System voltage Vcc 5V 10 Check that the system voltage is within 5V 10 a less than 4 5V the CPU may not work properly b more than 6V ghost will appear on LCD L9 4 2 2 Platter Stopper Checking platter device shall not touch anything around itself during operation Check that the platter is not contacted with the upper no load and or lower with load stopper 4 2 3 LCD Display Checking 4 2 3 1 Check that it is soldered and connected properly between LCD driver TC PCES5DTO driver PCES576 and CPU 4 2 3 2 Check whether LCD is broken 4 2 4 CPU Checking 4 2 4 1 Check that all pins are seated properly into the socket 4 2 4 2 Check that the Crystal Oscillator works 4 2 4 3 Check the RESET is normally low 4 2 5 A D Unit Checking 4 2 5 1 Check that the 5V powers are correctly fed to the A D unit 4 2 5 2 Check that the signal output of load cell is normal 4 2 5 3 Check OP Amplifiers amp
20. e resistance the excitation current inthe strain gauge changes and the analog output signal varies It is amplified and digitalized continuously by the A D converter into a digital signals Subsequently the resulting count 35 processed and managed by the CPU The CPU refers to the instructions from the keyboard and then conveys the output data to LCD driver which formats the data into a readout for the display 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION LOAD CELL Y POWER BOARD 205 2 PLATFORM 0 0 e W RECHARGEABLE BATTERY 6V 4Ah MMe 1 6 CONNECOTR INDICATOR MAIN BOARD 2 2 1 Connection between indicator platform PIN ASSIGNMENT INDICATOR PLATFORM SIG DC6V Desk Mount 2 3 1 Overall view 2 3 GENERAL SPECIFICATION B Platform Mount 7 NANA 2 MW 8 371 1 yu C Wall Mount 3 2 Dimensions Desk top Mount x Platter size 330 x 220mm Overall size 420 D x 300 W 100 H mm Platform Mount Platter sizer 330 280mm Overall size 420 D x 300 W 640 H mm 3 3 Model specification Model name APM series Display resolution 1 3000 Display Single sided Wecdghbsursplay 5 11111 3 4 Operation condition Power source Rechargeable batt
21. ery 6V 4Ah or AC adaptor DE 9 12 vy 5 Operating Temperature 107 407 Operating Humrd tryz 15 RH Power Consumption 0 1W When charoe 3 5 Main Components used MUCHO Processor 29052 Crystal Osciillactor 11 0592 MH Display device Liquid Crystal Display LCD Load cell 350 resistance load cell 3 6 Analog Specification INPUT SENSITIVITY 2mV V ZERO ADJUST RANGE 28 ZERO BALANCE RANGE 5 R O L C APPLIED VOLTAGE DC 5V SPEED OF A D CONVERSION 10 times sec LO D 3 INITIAL SETUP 3 1 INTERNAL FUNCTION AND SETTING METHODS INTERNAL FUNCTION TABLE Symbol 1 F 1 Span value reading HOW TO ENTER THE REQUIRED FUNCTION MODE Turn Scale off Press and hold TARE then turn scale on Scale display 1 Press TARE until the required function number appears Press MODE Press MODE until the required setting appears Press TARE to confirm Repeat step c to f for other function setting or Press ZERO to save settings and return to normal operation Ou O oo 0 F 1 Span Value Reading and Dealer Calibration Simply enter F 1 then put on the designated mass to check Span Value or keep going to do Dealer Calibration F 2 Full display segment check When function is entered scales will display all segments Check and make sure that no segment is missed EIS 00316 00111 110111 1111 1 Enter 3 scale displays the previous s
22. etting 2 Scale displays Capacity end division G3Gontrgurdtocon 3 Press MODE until the required configuration obtained Note In some countries only the metric weight unit is available Toemployall metricandpound weight units press MODE until lb appears To disable pound weight unit press MODE until kg appears 4 Press ZERO to save setting and back to normal operation Status 4 Auto Power Off Setting Two modes are available Default 4 OFF 0 OFF Auto Power Off function is disabled 4 OFF Scale will automatically turned off after 4 minutes unused 3 2 CALIBRATION ACCEPTABLE LOAD FOR CALIBRATION External Acceptable Calibration Load Division J CAT STAGE DUM ERTL 1 3000 5kg 15kg 173000 10 2 30kg 1 3000 20kg 60kg 1 3000 50kg 150kg Calibration Procedures Turn scale off Press and hold MODE then turn scale on Scale displays CAL 1 Press MODE Scale displays YES then Zero When zero point calibration is done scale will display Load is the 177 calibraci n load that has listed on above table Place calibration load onto the platform Press MODE Wait until the scale displays CAL 2 Press MODE to go proceeding cals oration stage If only One Point Calibration is required press TARE to escape calibration and return to normal operation bale disclasvg Yes then Load OOOO 18 the 2 n load Load calibration weight as required
23. olar input signal ranges of mV to 10 mV through 0 V to 1 225 V Its bipolar input signal ranges are 10 mV through 1 225 Y The AD7705 AD 7706 thus perform all signal conditioning and conversion for a two or three channel svstem The AD7705 AD 7706 are ideal f r use in smart microcontroller or DSP based systems They feature a serial interface that can be configured for three wire operation Crain settings signal polarity and update rate selection can be configured software Protected by U S Patent Number 5 134 401 SPI and QSPT are trademarks of Motorola Inc is a trademark of National Semiconductor REV Information furnished by Analog Devices ts believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use for any infringements of patents or other rights of third parties which may result from its use Mo license is granted by implication or otherwise under any patent or patent rights of Analog Devices Product specification PCF8576 BUS e ba cascaded for large LCD applications up to 2560 segments possible Cascadable with 24 segment LCD driver PGF8566 Optimized pinning for plane wiring in both single and multipla PCF8576 applications space saving 56 lead plastic very small outline package VSO SS Very low external component count at most one resistor even in multiple device applications Compatible with chip on glass
24. rough all tests and procedures ensure the scale meets all the meteorological and approval requirements Here are some features of t M Designed to meet NTEP class III 15kg 300kg free capacity 1 3000 external resolution Zero indicator Tare indicator Negative value indicator Subtractive tare function Power on zero function Manual zero function 10 Auto Power Saving Function 11 WIN LCD display 25mm height 5 1 2 digits 12 Low battery warning signal 19 2 points Calibration Mini jumper to prevent end user calibration 15 Optional EL badklighbs 4Accumulation Function 17 Bubble level Ad ustable feet 19 Built in rechargeable battery operated 20 adaptor included 21 Overload protection for positive and negative force 22 HMulti Indicator Mounting Methods DH W 2 5 5 MODEL SPECIFICATIONS Power on Zero Range kg Zero Range kg in Load kg Power voltage VDE requirements BY EXTERNAL DC 9 POWER ADAPTOR RECHARGEABLE BATTERY Operation 10 40 Environment Non condensed R H S 85 SPECIFICATIONS SUBJECT 10 CHANGE WITHOUT NOTICE 2 1 SYSTEM BLOCK DIAGRAM LCD DRIVER with POWER SUPPLY KEYBOARD AC ADAPTOR O KEYS A D UNIT IV 00mA RECHARGEABLE BATTERY 6V 4Ah LONG When a load applied to the load cell Th
25. ry Description The SM8958 series product is an 8 bit single chip micro controller with 32KB flash amp 1 RAM embedded It is a derivative of the 8052 micro controller family With its hardware features and powerful instruction set it s straight forward to make it versatile and cost effective controller for those applications which demand up to 32 O pins for PDIP package or up to 36 pins for PLCC QFP package or applications which need up to 32KB memory either for program or for data or mixed To program the on chip flash memory a commercial writer is available to do it in parallel programming method Ordering Information yywwv SM8958ihhk yy year ww week v version identifier A B i process identifier L 3 0V 3 6V C 4 5V 5 5V hh working clock in MHz 25 40 k package type postfix as below table Pin Pad Contato 8 8 pagers AL PLCC 559515 7 55517 Specifications subject to change without notice contact your sales representatives for the most recent information 1 19 Ver 1 1 PID 8958 05 01 33 5 8958 PO 4 AD4 5 5 6 PO 7 AD7 P4 1 ALE PSEN P2 7 A15 P2 6 A14 2 1 1 15 1 6 1 7 SM8958ihhQ RXD P3 0 44L QFP TXD P3 1 2 SINT1 P33 TO P34 Top View Technologies Inc May 2001 Pin Configurations e zum
26. technology Manufactured in silicon gate CMOS process 2 GENERAL DESCRIPTION The PCF3576 is a peripheral device which interfaces to almost any Liquid Crystal Display LCD with low multiplex rates It generates the drive signals for any static or multiplexed CCD containing up to four backplanes and up to 40 segments and can easily be cascaded for larger LCD applications The PCF8576 is compatible with mast micropracessars micracantrollers and communicates via a two line bidirectional 14C bus Communication overheads are minimized a display RAM with auta incremented addressing by hardware subaddressing and by display memory switching static and duplex drive modest PACKAGE Selectable backplane drive configuration static or 2 34 Philips Semiconductors Universal LCD driver for low multiplex rates 1 FEATURES Single chip LCD controller d river backplane multiplexing Selectable display bias configuration static or 14 Internal LCD bias generation with voltage follower buffers 40 segment drives up to twenty 8 segment numeric characters up to ten 15 seg ment alphanumeric characters or any graphics up to 160 elements 40 x 4 bit RAM for display data storage Auto incremented display data loading across device subaddress boundaries Display memory bank switching in static and duplex drive modes Versatile blinking modes LCD and logic supplies may be separated Wide power supply range
27. uffer RES Reset to pertinent blocks Vdd Power Circuit Interrupt Circuit XTAL1 Timing REA Generator ALE PSEN Instruction Register PC Incrementer Program Counter to whole chip to pertinent blocks to whole system Port 2 Port 3 Port 4 Latch Latch Latch Driver amp Mux Driver amp Specifications subject to change without notice contact your sales representatives for the most recent information 3 19 Ver 1 1 PID 8958 05 01 20 36 3 V 9 V 1 mW 2 3 Channel 16 Bit Sigma Delta ADCs AD7705 AD7706 ANALOG DEVICES FUNCTIONAL BLOCK DIAGRAM REF Yon REF ADT 7 05 5117 706 CHARGE BALANCING 1 A D CONVERTER ANALOG L INPLIT MAX BUFFER MODULATOR CHANNELS _ DIGITAL FILTER SERIAL IHTERFACE REGISTER MELEK IM CLOCK MELK OUT GENERATION E E GND TRUY RESET using the input serial port The part contains self calibration and system calibration options to eliminate gain and offset errors on the part itself or in the svstem CMOS construction ensures very low power dissipation and the power down mode reduces the standby power consumption to 20 uW typ These parts are available in 16 15841 0 5 inch wide plastic dual in line package DIP 16 lead wide body 0 5 inch small outline SOIC package and also a low profile 16 lead TSSOP PRODUCT HIGHLIGHTS
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