MII Service Manual
Contents
1. INH TI P5 4 PWMO 8Z0 Pit 3 4 5V Deza 1047 1047 20P C15 PL E XIN p13 Hie s PIA 6 P4 x MHz 25_ xour PO D INTO Bg I RD 3 PB T 22 PO T INTI LXIN 18 C C16 20p 23 xour f c 20 E R16 10K BL7027 05 E 13 ZERO a 14 C945 ja LOBAT ya 12 5 2 4 a SET SW z TARE SWS z HI LO SAMPLE J S46 z MODE 1 IC 4051B 2 ju 3 55 cal JP1 i c14 VSS vs51 le INH O inn 21 37 10UF ET C17 I JA u VEE 20P IC SNBP1908 x2 y A kg ib 32 768KHZ 26 c 8 5V 20P Pr o itle zm xx 55 m alu ASK MAIN BOARD rs 232 Drawing No Revision ASK 10 2 Size A3 Sheet 1 of 1 Date 94 08 31 Drawn by 1 2 3 4 5 6 7 8 9 5 2 PCB LAYOUT M2 10 2 TOP LAYER M2 10 2 BOTTOM LAYER DC JACK BATTERY S St E Et fh Ji GND BATI apr ca 6 W E Sr ao GA Mc QW A Den B CAL s O KIM e Dn any n e J3 U2 03 022 c19 R22 R6 RV E h RI5 NG re JAN MW W Sa TXD BZ1 A W D2 gu C2. a b Pres Er Enter Fun 7 s MODE An2 there are to shif be Lay shows nuous tran trAnl Fun 8 UTP label format selection 8 ca s MODI re mu i I S until desired label t be several label n only appear when choosing two modes to be selected trAnl or trAn2 tween them For Sending data once when weight is stabilized press TARE to save when dispi Forconti smission press TARE to save when display shows UTP in Fun 5 48 gt gt forma formats See UTP manual to design the label a Fun UtP b Pres the Qu Press ON Z Fun 9 Auto tare setting Two modes are available TroFF Tr on De Auto tare t appears Form0 Form9 stored in UTP printer forma ERO to save setting and return to normal operation fault TroFF function is disabled Scalewillautomaticallytareoff the initial weight that places on the platter Fun 12 Copies of UTP label printing a b Enter Fun 12 up to 9 copies of Press ON Z press MOD i Li until desired quantity appears UTP label can be set Fun 15 UTP time date setting I t must be a UTP printer ins Properly when trying to set up UTP s a Enter Fun 15 press MODE to show present b Enter correct date data by utilizing MOD ON ZERO up keys c
3. Pia 3 4 displays Scale will sel calibrat point After point Load cal zero poini point calibration f calibrate zero point ion t calibration is done scale displays LOA DON for operation fore proceed to the R De Turn scale off Press and hold TARE then turn scale on Scale displays Fun 1 Press MODE Scale displays offset value Press and hold MODE Scale displays CAL 0 Scale will self calibrate zero point be point calibration After zero point calibration is done scale displays LOA point Load calibration load as request Wait until scale displays LOAD XXXX second point Load calibration load as request or press TAR point calibration wait until scale displays 12 Calibration completed and scale is ready then turn scale on be Load calibration load as request Wait until scale displays LOA ibration load as request or press TAR wait until scale displays Calibration completed and scale is ready DON firs D XXXX firs E to abandon second fore proceed to the D XXXX second point E to abandon second Ta G Le for operation firs DXXXX firs 12 3 3 DISABLE CALIBRATION WITH MINI SWITCH SW7 The mini switch SW7 is used to control calibration to press the switch before entering calibration procedure 3 4 OFFSET AND SPAN VALUE DATA
4. 10 3t G0004JW0001 PLASTIC ADJUSTABLE FEET JW SERIES 28 20h OPTION C1SK0010000 OVERLAY SK SERIES G0009M20000 BATTERY CAP MII SERIES A0906000220 D C JACK SCD 022 G00080PS000 BATTERY SOCKET 6F22 TYPE A1202030161 WIRE ARRAY 3PIN 16cm SINGLE HOUSING A1202030251 WIRE ARRAY 3PIN 25cm SINGLE HOUSING A60 kkw ADAPTOR V 9V 100mA C1M20000000 LIGHT GUIDE PANEL 70 28 3t BACK LIGHT AG0 KK KKKK ADAPTOR V 9V 100mA ASK 10 X MAINBOARD EOASK000010 P C B ASK 10 X A0201019081 EC SN8P1908 ul A0202093462 Tec 93C46PC27 OR 93LC46 U2 31 A0205040510 Tec CD4051BE 1 u A0205040990 NOT CD4099BE 1 U4 A0207029500 VOLTAGE REGULATOR I C LP2950ACZ 5 Lo US A0401009450 TRANSISTOR 2sC945 4 02 5 A0401007330 TRANSISTOR A733 i 61 A0501004148 DIODE 1N4148 3 D1 3 A0600030000 L E D 3 ROUND WHITE LIGHT 2 BACK LIGHT A0701105050 CAPACITOR EC luF 50V 3 C9 11 19 A0701106017 CAPACITOR EC 10uF 25V SS TYPE 5 C10 12 14 20 A0701477016 CAPACITOR EC 470uF 16V L X923 A0731104050 CAPACITOR X7R 0 1uF 50V 104 10 C1 8 21 22 A0740020050 CERAMIC CAPACITOR CC 20pF 4 C15 18 A0804041002 METAL FILM RESISTOR 10KQ 1 4W 2 R10 11 A0804042203 METAL FILM RESISTOR 220KQ 1 4W dl R14 A0804043002 METAL FILM RESISTOR 30KQ 1 4W 1 R9 A0804045601 M
5. 22K 514 C945 47K RA RB BATI IK M5 6K 04 ia mi 1047 EA LCDI C LOBAT SW2 CIS CB R21 i OFF up R20 1042 D2 1N4148 E S15 913 SI wo S12 Di 1 19 en E 1N4148 e le AUTO OFF 1UF 10UF 45 VLCD 1 VLEDI ZERO gt c2 15 Lacy 1 2 3 4 8 31 10 11 12 13 14 15 16 LCD G244 a lu von VDDI com conz COMA VPP RST SEGO 4 R 17 Jdavpper SEG Cid Z UF 5 SEC2 A0 SEG3 c3 RI2 100K SEG4 x SEG5 Tz RIS SEGE ao SEG7 x SEGS R X M30K 16 SEG10 RB RT RID AVDDR SEGNI SEGI2 Mag Re SEG13 SEG14 RII MIOK 5 SECIS 10 SEG24 P2 0 A 12 E SEG26 P2 2 C6 RIAA AI220K SEG27 P2 3 n SEG28 P2 4 A12 SEG29 P2 5 RI SEG30 P2 6 c7 A 13 SEG31 P2 7 12 St O 104Z 1 A13 I 2 N 29 32 P3 s po 2300 JP9 3 PWM1 821 PLO 34 24 lo s S x NI u4 ic 4093 5V uz VDD a0 Oauro orr vss at esvec 12 SK NB q2 1 CL a DI NC E ga H 1 Dro DO GND t DO CH 5V 5V R22 M47R D Q5 45 Ao 06 M a7H SECLO7 30 A2 BL1 R15 10K
6. CHECK LOAD CELL OK A D UNIT OFFSET VALUI 7 UNSTA CHECK POWER SUPPLY LCD CPU R21 R22 MII R19 R20 SK INCORRECT CHECK PLATTER STOPPER LOAD CELL A D UNIT BA D SOLD ER CAN T REACH TH FULL CAPACITY LJ NORMAL CHECK PLATTER STOPPER LOAD CELL OFFSET VALUE OP 22 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 4 2 1 Power Supply Checking 4 2 1 1 Relevant parts Main Board M2 10 X ASK 10 X 01 A733 D3 1N4148 02 C945 03 C945 U3 2950 5 DC JACK SCD 022 DC Jack MAS cz i 470uF 16V 1N4148 ZERO Description AC Adaptor This AC Adaptor provides power of DC9 12V 100mA 1 2 Battery Battery 9V 6F22 TYPE 5V power drives analog digital circuit systen U3 2950 5 is a 5volts Voltage Regulator Auto o Ifthescaleisset withXX oFF Fun 4 or even under LO CPU will release a high potential signal to cut Q2 of time reached Without E B biasing 01 will be off the scale immediately BAT situa tion after se Low Power Detection Th
7. OFFSET AND SPAN VALUE DATA TABLE It is necessary Model Offset Value Span Value Thousand at Offset Span Number Thousand Various Load Applied Control Control MII 600 SK 600 3425 16 25 at 200g 40 65 at 500g R14 R19 R1 19 SK MII 1200 SK 1200 R14 R19 AN SK 1500 3 25 20 32 at 500g 40 65 at lkg R1 19 SK MII 3000 SK 3000 3425 17 26 at 1lkg 35 53 at 2kg R14 R19 R1 19 SK MII 6000 SK 6000 3425 16 25 at 2kg 40 65 at 5kg R14 R19 R1 19 SK MI1 2500 3 25 17 26 at 1kg 35 53 at 2kg R14 R19 MII 5000 3225 16 25 at 2kg 40 65 at 5kg R14 R19 READING OFFSET VALUE 1 Turn scale off 2 Remove all load from platter 3 Enter Fun 3 and read the offset value READING SPAN VALUE 1 Turn scale off 2 Remove all load from platter 3 Enter Fun 1 4 Press ZERO 5 Apply load to platter be displayed Span value according to load applied will HOW TO ADJUST OFFSET VALUE In case the of at R19 too low for SK high fset value is out of or R14 too high on the main board to obtain correct of f range for MII R1 insert the resistor loca too low or R14 ted too fset value 1 3 3 5 FLOW CHART 3 5 1 Auto Calibration for end user DISPLAY PRESS MODE amp ON ZERO RE
8. Press and hold MOD time data hh mm ss d Enter correct time data by utilizing MOD ON ZERO up keys e Press TARE ERO to save setting and return to normal talled and connected operation to scale date time data date data mm dd yy E shift right and E to save setting then scale displays present TS E s Ju hift right and to save setting and then press ON ZERO to restart Fun 19 EC verification For qualified personnel only According to test procedures of func up EC veri fication enter this tion to extend the display digits to 1 30000 resolution for high resolution mode 11 3 2 AUTO AND DEALER CALIBRATION PROCEDURES ACCEPTABLE LOAD FOR AUTO AND DEALER CALIBRATION Acceptable Auto and Dealer Model Number External Division Calibration Load First point Second point MII 600 SK 600 1 6000 1 3000 200g 500g MII 1200 SK 1200 1 6000 500g 1kg SK 1500 1 3000 500g lkg MII 2500 1 2500 1kg 2kg MII 3000 SK 3000 1 6000 1 3000 1kg 2kg MII 5000 1 2500 2kg 5kg MII 6000 SK 6000 1 6000 1 3000 2kg 5kg Dealer Calibration Procedures AJ O 01 EW NH Auto Calibration Procedures 1 Turn scale o Press Scale and hold MODE CAL 0
9. are properly set After servicing it is necessary to go through all tests and procedures to ensure the scale meets all the metrological and approval requirements Here are some features of the MII SK series Zero Tare Negative value indicators Subtractive tare function Power on zero function Manual zero function Auto Power Saving Function Low battery warning signal Counting amp checking functions included SK series 1 6000 or 1 2500 display resolution MII series 1 6000 or 1 3000 display resolution SK series 9 5 172 x 20mm LCD display MII series 5 1 2 x 10mm LCD display SK series 10 Dual power By 6F22 9V dry battery and external AC DC power adaptor Dual Metric and Avoirdupois weight units 2 Types of Calibration Overload protection against positive and negative force AC DC power adaptor and S S platter cover included Hidden mini switch to prevent end user calibration Optional RS 232C interface 0 J O 014 W NE O OT BE W N H 2 SPECIFICATION 2 1 SYSTEM BLOCK DIAGRAM LCD DISPLAY RS 232C NTERFACE CPU with ROM Nn pd ti POWER SUPPLY EP ROM i 1 AC ADAPTOR 9V 100mA 2 DRY BATTERY 6F22 9V Description When an article is placed on the platter the load of the article is ap
10. 02M20000 PLASTIC PLATTER MII SERIES G0005000000 ADJUSTABLE FEET RUBBER 10 3t 4 G0004JW0001 PLASTIC ADJUSTABLE FEET JW SERIES 28 20h 4 OPTION C1M20031 OVERLAY MII SERIES 1 G0009M20000 BATTERY CAP MII SERIES A0906000220 D C JACK SCD 022 G00080PS000 BATTERY SOCKET 6F22 TYPE A1202030161 WIRE ARRAY 3PIN 16cm SINGLE HOUSING A1202030251 WIRE ARRAY 3PIN 25cm SINGLE HOUSING A60 k ADAPTOR V 9V 100mA C1M20000000 LIGHT GUIDE PANEL 70 28 3t BACK LIGHT AG60 xe ADAPTOR V 9V 100mA M2 10 X MAINBOARD EOM20000010 Pu CB M2 10 X 1 A0201019081 I E SN8P1908 1 U1 A0202093462 Tas 93C46PC27 OR 93LC46 1 U2 A0207029500 VOLTAGE REGULATOR I C LP2950ACZ 5 1 U3 A0401009450 TRANSISTOR 2sC945 4 02 5 A0401007330 TRANSISTOR A733 1 OL A0501004148 DIODE 1N4148 3 D1 3 A0600030000 LE BD 3 ROUND WHITE LIGHT 2 BACK LIGHT A0701105050 CAPACITOR EC luF 50V 3 c9 11 19 A0701106017 CAPACITOR EC 10uF 25V SS TYPE 5 C10 12 14 20 A0701477016 CAPACITOR EC 470uF 16V 1 E21 A0731104050 CAPACITOR X7R 0 1yF 50V 104 9 C1 8 22 A0740020050 CERAMIC CAPACITOR CC 20pF 4 C15 18 A0804041002 METAL FILM RESISTOR 10KQ 1 4W 2 R10 11 A0804042203 METAL FILM RESISTOR 220KQ 1 4W 1 R14 A0804043002 METAL FILM RESISTOR 30KQ 1 4W 1 R9 A0804045601 METAL FILM RESISTOR 5 6KQ 1 4W 1 R6 A0805041101 CARBON FILM RESISTOR 1000 1 4W 1 R18 A0805041102 CARBON FILM RESISTOR 1KO 1 4w 2 R1 4 A0805041103 CARBON FILM RESISTOR 10KQ 1 4W 5 R7 15 16 20 21
11. 30 A0805041104 CARBON FILM RESISTOR 100KQ 1 4W R2 12 13 A0805041470 CARBON FILM RESISTOR 470 1 4W R23 A0805041223 CARBON FILM RESISTOR 22KQ 1 4W R17 A0805041393 CARBON FILM RESISTOR 39KQ 1 4W R22 A0805041473 CARBON FILM RESISTOR 47KQ 1 4W R3 5 A0901010030 CONNECTOR 3PIN WAFER J6 A0901010040 CONNECTOR 4PIN WAFER J3 A1100032768 CRYSTAL 32 768KHZ X2 A1100240001 CRYSTAL 4MHZ us x1 A1306000002 TACT SW KPT 1105E SW1 2 4 6 A1500000004 BUZZER OBO 15210 Bzl A0102004545 LCD M4544A 3 5V LCD1 RS 232 OPTION E1DM0100000 P C B KIT DM 70 1 A1202040221 WIRE ARRAY 4PIN 22cm SINGLE HOUSING F0010005012 SCREW WITH NUT 5 51L 4 40UNC 1 2 L SK SERIES STRUCTURE Parts No Description Specification Oty Remark E1ASK000010 P C B KIT ASK 10 X MAINBOARD 1 AO031 LOAD CELL SSA TYPE 1 6000 A0043 LOAD CELL SS 22 TYPE 1 3000 G0001M20001 UPPER CABINE MII SERIES WHITE G0001M20000 UNDER CABINE MII SERIES GRAY F0003M20000 ALUMINUM L C SUPPORT MII SERIES UNDER F0003M20001 ALUMINUM L C SUPPORT MII SERIES UPPER F0002MM0000 S s PLATTER MM SERIES G0002M20000 PLASTIC PLATTER MII SERIES G0005000000 ADJUSTABLE FEET RUBBER
12. 4 AM R6 R21 R23 CND R17 KB MW M2 10 2 iyu 2005 08 24 M2 10 2 TOP OVERLAY 27 SW6 SW4 SW SW2 ON ZERO OFF BATI He p co Visveg ade gt E a Q1 dr ak 4 VJ RC DI R6 U5 BZ1 RI RS 232 ANC 4 PD e 59 3 LED SW7 k JP1 CAL SW LED R22 AM R16 10 je 02 LB TG ASK 10 2 TOP OVERLAY s LCD1 SWS SW3 SW6 SW WI SW2 ON ZERO OFF ASK 10 2 BOTTOM OVI ERLAY 29 6 BILL OF MATERIAL MII SERIES STRUCTURE Parts No Description Specification Oty Remark E1M20000010 P C B KIT M2 10 X MAINBOARD 1 A0031 LOAD CE SSA TYPE 1 6000 A0043 x xx LOAD CE SS 22 TYPE 1 3000 G0001M20001 UPPER CABINE MII SERIES WHITE G0001M20000 UNDER CABINE MII SERIES GRAY F0003M20000 ALUMINUM L C SUPPORT MII SERIES UNDER F0003M20001 ALUMINUM L C SUPPORT MII SERIES UPPER F0002MM0000 S S PLATTER MM SERIES G00
13. ECT AUTO OFF MODE 00FF 40FF 100EF 200FF 300FF MODE PRESS MODE TO SELECT IBAUD RATE 4800 9600 19200bps OR UTP OPTION PRESS amp HOLD MODE PRESS MODE TO SELECT PROTOCOL E71 or n81 18 TARF PRESS MODE TO SELECT Filt 1 medium OR Filt 2 high ZERO TADE MANE SELECT RS 232 TRANSMISSION IMODE trAnl OR trAn2 19 7ERN TADE MANE SELECT UTP LABEL FORMAT Form0 9 choosing UTP in Fun 5 Fun 8 only appears when TARE i JERN I u M ODE u ENABLE AUTO TARE FUNCTION TADE V MODE 20 TARE JERA SELECT UTP LABEL COPIES COPY 1 9 Fun 12 only appears when choosing UTP in Fun 5 TARE 7EDN ESEE DATE DATA ENTER CORRECT DATE DATA BY MODE amp ON ZERO KEYS PRESS amp HOLD MODE TIME DATA ENTER CORRECT TIME DATA BY MODE amp ON ZERO KEYS Zub 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP NO DISPLAY ECK POWER SUPPLY U TACT SW ZERO DRI FT UNTS AND EN Z ERO HECK POWER UPPLY A D UNIT AD SOLDERING EMP EFFECT H NA GHOST ER ON U ISPLAY RANDOM FIGURE ECK CPU LCD SHOW 00000
14. EGFEFEEREEEEREE C945 al oje lol joke lo IE a A Losar FIK R4 RZD Re a 19 26 31 man TJ KS EME ji m gt va gt S 2 si 0945 VLED1 a z a ro u c2 1 en en s m N on CN AUTO OFF le 104z __ PADUF IN414B ci i eer SM 1 AVDDCP AUF nur ZERO 8 igor Ea x RIZ V 100K m N X ca 1047 RIS 100K 3 lag c20 M Dur vi RB RS M3OK A I i 15 AVDDR al RT RID N MIOK R 3 BV EX pt O R11 MIOK sk E o SEG24 P2 0 44 LOBAT ATZ 5EG25 P2 1 FR ZERO MN SEC PLA Tul amp O IH H R u220k SEG27 PZ 3 X7R 5 SEG28 P2 4 Mode SA A 12 SEG29 P2 5 4 SEG30 P2 6 C7 R19 A13 SEG31 P2 7 SW 2 ji 1 JA 5 m 1042 X7R A13 cd Sou 3 TS A P5 3 PWMI BZ1 C 18 16 05 P5 4 PWMO BZO 104z X7R 20P 015 24 Lan 931046 N M e RIS cs vee a 10K SK NC ru a 28 Di NC z a RE 4MHz ALT ema PANCE 3 10K 22 ji y A I LXIN u l E il cis loop 23 Kori v 5 c B en 04 C845 gt gt E T 14 21 37 y 10UF bid N dop IC SNBP1908 u BLI Q fu 2 1 EL RS 232 BL7D27 kosa 9 10889 al cip 32768KHZ E i 20P Title Drawing No Revision Size A3 Sheet 1 of 1 Date 94 08 24 Drawn by 7 8 25 Je 5V u3 am als 623 ai 29505 O RE 470uF 16V A733 mg p io u wH amp a GND cg v Dom Wt 5V RIS 10K n R2 100K EN 47K 18 17
15. ETAL FILM RESISTOR 5 6KQ 1 4W 1 R6 A0805041101 CARBON FILM RESISTOR 1000 1 4W 1 R18 A0805041102 CARBON FILM RESISTOR 1KQ 1 4w T RA A0805041103 CARBON FILM RESISTOR 10KQ 1 4W 5 R7 15 16 19 21 A0805041104 CARBON FILM RESISTOR 100KQ 1 4W 4 R2 12 13 20 A0805041470 CARBON FILM RESISTOR 470 1 4w 1 R22 A0805041223 CARBON FILM RESISTOR 22KQ 1 4W dl R17 A0805041473 CARBON FILM RESISTOR 47KQ 1 4W 2 R3 5 A0901010020 CONNECTOR 2PIN WAFER 1 35 A0901010030 CONNECTOR 3PIN WAFER J6 A0901010040 CONNECTOR 4PIN WAFE 1 J3 A1100032768 CRYSTAL 32 768KHZ 1 x2 A1100240001 CRYSTAL 4MHZ us 1 XI A1306000002 TACT SW KPT 1105E 6 SW1 6 A1500000004 BUZZER OBO 15210 1 BZ1 A0102000244 B C ID UTS G244JV 1 LCD1 RS 232 OPTION E1DM0100000 P C B KIT DM 70 1 A1202040221 WIRE ARRAY 4PIN 22cm SINGLE HOUSING 1 F0010005012 SCREW WITH NUT 5 5L 44 40UNC 1 2 L 2 32 33
16. LEASE ON ZERO KEY PUT A ASSIGNED WEGHT ON PLATTER Y CORRECT WEIGHT ASSIGNED ZERO POINT CALIBRATION RELEASE MODE KEY DISPLAY YES PUT A ASSIGNED WEGHT ON PLATTER NO DISPLAY noStb CORRECT WEIGHT ASSIGNED YES PRESS TARE KEY TO ABANDON 2nd POINT CALIBRATION STANDBY FOR OPERATION DISPLAY XXXX FIRST POINT 14 3 5 2 Function Test for technicians only START PRESS TARE amp ON ZERO LCD PANOR AMIC VIEW RELEASE ON ZERO KEY RELEASE TARE KEY Y Fun 1 MODE Other S J Y TARE Fun 2 of 99999 2 COUNT DOWN STANDBY FOR OPERATION 15 DISPLAY xxxx Show offset XXXX PRESS ZERO TEST SPAN VALUE AD gt 0 3 feee counts LOAD ASSIGNED WEIGHT CORRECT SPAN VALUE YES CLEAR OFF THE PLATTER PUT ON THE ASSIGNED WEIGHT CO VEG END PUT ON THE WEIGHT CORRECT WEIG ASSIGNED 16 MODE L C D PANORAMIC VIEW XXXX Capacity MODE WEIGHT UNIT CHANGED kg lt gt kg lb RESS amp HOLD MODE KEY 1 SCALE CAPACITY SELECTED e g 600x0 1g gt 1200x0 2g gt 2 SCALE INTERVAL CHANGED e g 600x0 1g lt gt 600x0 2g CAPACITY CHANGED TARE 17 Auto shut off when not in use for 4 min u M ODE u PRESS MODE TO SEL
17. MAINTENANCE MANUAL MII SK SERIES MODELS MII 600 1200 3000 6000 1 6000 MII 2500 5000 1 2500 SK 600 1200 3000 6000 1 6000 SK 600 1500 3000 6000 1 3000 CONTENTS 1 INTRODUCTION 2 SPECIFICATIONS 2 1 SYSTEM BLOCK DIAGRAM 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION 2 3 GENERAL SPECIFICATIONS 3 INITIAL SETUP 3 1 INTERNAL FUNCTION AND SETTING METHODS 3 2 AUTO AND DEALER CALIBRATION PROCEDURES 3 3 DISABLE CALIBRATION WITH DIP SW Sl 3 4 34 5 OFFSET AND SPAN VALUE DATA FLOW CHART 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 5 ELECTRICAL CIRCUITRY 5 1 SCHEMATICS 5 2 PCB LAYOUT 6 BILL OF MATERIAL OCT 2005 Specifications and Function Subject to Change without Notice 1 INTRODUCTION Thismaintenance manual contains of certain information that may result in fraudulent use Do not release any part of this manual to any end users or un authorized persons Ender users should be advised not to undertake any trouble shooting except those listed on the operation manual The internal mini switch should be so set to prevent un authorized settings or alternations Should a load cell has been replaced make sure that the protection devices
18. e 03 c945 is designed to detect the power level When battery power is less than 5 5V the collector pole of Q3 will become high potential level to shut tting down mean while CPU detects the level changed then 23 CPU will light up LO BAT indicator on the display 4 2 1 2 Input voltage Check and replace battery if voltage less than 5 5V Check 5 5V or higher DC JACK or AC Adaptor if been defectiv 4 2 1 3 System voltage Vcc 5V 10 Check that the syst a b less more than 4 5V than 6V i tem voltage is within 5V 10 the CPU may not work properly t may damage some components 4 2 2 Platter Stopper Checking The platter device shall not touch anything around itself during operation Check that the platter is not contacted with the upper and or lower with load stopper no load 4 2 3 LCD Display Checking 4 2 4 2 4 2 When no error is can be caused on di 5 5 1 Check that it is soldered and connected properly between LCD and CPU CPU Checking 3 1 Check that all 2 Check whether LCD is broken pins are properly soldered 2 Check that the Crystal Oscillator works Check the RESET is normally high A D Unit Checking si 2 3 Check that the 5VA 4 5V powers are correctly fed to the A I D unit Ch Ch eck that t
19. he signal output of loadcell is normal eck Micro Controller SN8P1908 found with the above checking procedures the trouble the loadcell or the PCB itself Replace a new on could be better to identify the defectiv Inthis way the readout of weight would be varied because of the output voltage of required a loadcell and different span value so re calibration is fter this replacement 24 5 ELECTRICAL CIRCUITRY 5 1 SCHEMATICS 5V 5V J6 D3 us Oo sij DC JACK 1N4148 C21 m 2350 5 amp 470uF 16V A i a gt s vi vo R21 RU 22k 3 eo ZE CIO GND 10k 5 5 7 z 5 SET ce ej Lcpt dnm U DOSE R5 TOUF R7 T ur d e N k i 7 HATE 1 10K BIA D2 wate TO LCD M4544A N I ML 1022 Jaan ose f JJ oz T RB PCS N 02 a 1UF 1042 139K 100R z 1 EFF
20. ion MII 600 600g 0 1g 1 6000 MII 1200 1200g 0 2g 1 6000 MII 3000 3000g 0 5g 1 6000 MII 6000 6000g 1g 1 6000 MII 2500 2500g 1g 1 2500 MII 5000 50009 29 1 2500 0 1g 1 6000 K re ee 0 29 1 3000 SK 1200 12009 0 29 1 6000 SK 1500 15009 0 5g 1 3000 0 5 1 6000 SK 3000 3000 gt 1g 1 3000 1g 1 6000 K SK 6000 6000g og 1 3000 Tare Range Full Tare Range Platter 205 x 130 mm Display Type LCD Display Power Source By 6F22 9V dry battery or power adaptor Operation 0 40 C 32 104 F BIN FORMENE Non condensed R H S 85 Standard Package Individually Packed Dimension 360 L x 270 W x 100 H mm Net Gross Weight 1 0 1 5kg 2 3 5 Main Components Used Microprocessors SN8P1908 Crystal Oscillator 4 0MHz Display Device 5 1 0 x 20mm LCD display MII series 5 1 2 x 10mm LCD display Load Cell Used SK series SSA type load cell 1 6000 SS 22 type load cell 1 2500 or 1 3000 Load Cell Capacity MII 600 0 7kg 1 6000 sK 600 0 7kg 1 6000 MII 1200 1 5kg 1 6000 sK 600 lkg 1 3000 MII 3000 3kg 1 6000 sK 1200 1 5kg 1 6000 MII 6000 6kg 1 6000 SK 1500 2kg 1 3000 MII 2500 4kg 1 2500 SK 3000 3kg 1 6000 MII 5000 6kg 1 2500 SK 3000 4kg 1 3000 SK 6000 6kg 1 6000 SK 6000 6kg 1 3000 2 3 6 Analog Specification Input sensitivity 2mV V Zero Drift 0 2 R O 10 C Zero Balance Ra
21. nge 1 of rate capacity Load Cell Excitation Voltage DV5V A D Conversion Speed 25 times second Max Internal Resolution 65536 counts 3 INITIAL SETUP 3 1 INTERNAL FUNCTIONS AND SETTING METHODS INTERNAL FUNCTION TABLE Function Symbol Description 1 Fun 1 Span value reading and dealer calibration 2 Fun 2 Full display segment and max capacity check 3 Fun 3 Check offset value and scale configuration 4 Fun 4 Auto power off setting 5 Fun 5 Select RS 232 baud rate amp protocol 6 Fun 6 Motion filter speed setting 7 Fun 7 RS 232 transmission mode 8 Fun 8 UTP label format selection 9 Fun 9 Auto tare setting 12 Fun 12 Copies of UTP label printing 15 Fun 15 UTP time date setting 19 Fun 19 EC verification For qualified personnel only HOW TO ENTER THE REQUIRED FUNCTION MODE a Turn scale of b Press and hold TARE then turn scale on Scale display Fun 1 C Press TARE until the required function number appears d Press MODE e Press MODE until the required setting appears f Press TARE to confirm g Repeat step c to f for other function setting or h Press ON ZERO to save settings and return to normal operation Fun 1 Span Value Reading and Dealer Calibrati
22. on a Simply enter Fun 1 to read the A D counts b Press ON ZERO to clear the A the span value of test mass will be displayed D counts apply test mass onto platter c Refer to Dealer Calibration procedures for dealer calibration Fun 2 Display Segment and Rated Capacity amp Division Check ntered all segments will be displayed Check and make sure that no segments are missed When function is e Fun 3 Total Internal Count Checking and Scale Configuration a Enter Fun 3 scale displays the Of b Apply extra load onto pla be displayed fset Value when unloaded tter the total internal count value will SELECT WEIGHT UNITS a Press MODE scale will display weight units that have been chosen b To employ all metric and pound oz weight units press MODE until ga Ib oz indicators appear To disable pound oz weight units press MODE until g indicator appears only c Press ON ZERO to save setting and back to normal operation status SELECT CAPACITY AND MIN DIVISION a Enter Fun 3 press MODE once to display capacity and min division press and hold MODE to choose desired number o interval 60004 25004 for MII 6000d 3000d for SK b Press and hold MODE available scale capacity and min division appears c Press MODE until desired scale capacity appears Press TARE to save setting e Re calibra
23. plied to the load cell inside the scale The resistance to the excitation current in the strain gauge will then hanged and the analog output signal varies Q It is amplified and digitized continuously by the A D converter into a digital signal Subsequently the resulting count is processed and managedbytheCPU TheCPUreferstotheinstructions fromthe keyboard and then conveys the output data to LCD driver which formats the data into readout on the display panels 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION MI SERIES DRY BATTE 6F22 9V SW6 SW4 SW jz SW2 ON ZERO sy OFF M2 10 X RS 232 BOARD DM 70 1 SK SERIES DRY BATTE 6F22 9V MAIN J5 E E BATTERY J6 ET 7 GND 0 po sw5 SW3 5V LCDI SW6 SW4 ASK 10 X RS 232 BOARD DM 70 1 2 3 GENERAL SPECIFICATION 2 3 1 Overall View MII SERIES SK SERIES 2 3 2 Overall Dimension 210 W X 205 D X 70 H mm 2 3 3 Platter Size 205 X 130 mm 2 3 4 Model Specifications Model Numb C it Min Divisi DEPO ode umber apacity in Division Resolut
24. tion will be required after scale capacity changed f scale O Fun 4 Auto Power Off Setting Five modes are available Default 4 OFF 0 OFF Auto Power Off function is disabled 4 OFF Scale will automatically be turned off after 4 minutes unused 10 OFF lt Scale will automatically be turned off after 10 minutes unused 20 OFF Scale will automatically be turned off after 20 minutes unused 30 OFF Scale will automatically be turned off after 30 minutes unused Fun 5 Select RS 232 baud rate amp protocol a Enter Fun 5 the default setting is 9600 N81 Press MODE to select baud rate of 4800 9600 or 19200 Press and hold MODE to enter protocol setting Press MODE until desired protocol P n81 or P E71 appears Press ON ZERO to save setting and return to normal operation I 00 00 Fun 6 Motion filter speed setting Motion filter is used to give a more stable display when the working environment is affected by motion or airflow interference Refer to the below table for motion filter speed setting Symbol Strength of Motion Filter Filt 0 Disable Normal Files Medium Filt 2 High 10 Fun 7 RS 232 transmission mode
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