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PW-II

Service Manual

3

5.

Part Location

............................................................................................................................ 18

5.1.

Main PCB (Front)

........................................................................................................... 18

5.2.

Main PCB (Rear)

............................................................................................................. 19

5.3.

Battery PCB

....................................................................................................................... 20

5.4.

Key PCB

............................................................................................................................. 201

6.

Partlist

......................................................................................................................................... 22

6.1.

Circuit Part .................................................................................. 22

6.1.1. Main PCB Ass'y....................................................................22
6.1.2. Battery PCB Ass'y................................................................23
6.1.3. Key PCB Ass'Y………………………………………………………………23

6.2.

Mechanism Part ........................................................................... 24

6.2.1. Body Ass'y...........................................................................24
6.2.2. C/T Box Ass'y......................................................................25
6.2.3. Loadcell Ass'y………………………………………………………………25

7.

Error Message & Solution…………………………………………………………...26

7.1. Beep : Re-zero…...........................................................................26
7.2. Err : Initial zero…………………………………………………………………….26
7.3 Init : Failure of Analog Module……………………………………………….26
7.4 UNSTA : A/D Value Unstable………………………………………………….26

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Summary of Contents for PW-II

Page 1: ...PW II Service Manual 1 PW II SERVICE MANUAL ...

Page 2: ...Setting 9 2 1 1 3 C4 3 Setting 9 2 1 1 4 C4 4 Setting 9 2 1 1 5 C4 5 4 6 Setting 10 2 1 2 SPAN Calibration Setting C 3 10 2 1 3 Gravity Constant Value Setting C 9 11 2 1 4 Displaying Real A D Value C 5 11 2 1 5 How to confirm SPAN calibrated A D value C 1 12 2 1 6 Back to the normal weighing mode C 0 12 2 1 7 Calibration Block Diagram 13 3 The Schematics and Diagram 14 3 1 System Block Diagram 14 ...

Page 3: ...st 22 6 1 Circuit Part 22 6 1 1 Main PCB Ass y 22 6 1 2 Battery PCB Ass y 23 6 1 3 Key PCB Ass Y 23 6 2 Mechanism Part 24 6 2 1 Body Ass y 24 6 2 2 C T Box Ass y 25 6 2 3 Loadcell Ass y 25 7 Error Message Solution 26 7 1 Beep Re zero 26 7 2 Err Initial zero 26 7 3 Init Failure of Analog Module 26 7 4 UNSTA A D Value Unstable 26 ...

Page 4: ...Make sure that you plug your scale into the proper power outlet Place the scale on a flat and stable surface Plug into a power outlet 30 minutes before operations Keep the scale away from strong EMI noises may cause incorrect weight readings This scale must be installed in a dry and liquid free environment Do not subject the scale to sudden temperature changes Do not subject the platter to sudden ...

Page 5: ...0g 2 g 10 kg 0 002 kg 1 5 000 20 lb 0 005 lb 400 oz 0 1 oz 1 4 000 Internal Resolution 1 20 000 1 25 000 1 20 000 External Resolution 1 2 000 1 2 500 1 2 000 Display 91 X 39 mm 3 6 X 1 5 inch 5 digits LCD Symbols Indicators STABLE ZERO TARE g kg lb oz Low Battery HI OK LO PCS Keys ZERO TARE HOLD UNIT POWER Functions Simple Weighing function Hold function Weight Unit Conversion Function g kg lb oz ...

Page 6: ...LD To make the weight of item stable This weight is average value UNIT Used to convert the unit of weight TARE To input or cancel the tare the weight of container ZERO O Set To set zero point To do SET key in the SETUP mode POWER To turn on or off ...

Page 7: ...PW II Service Manual 7 1 5 Sealing Method ...

Page 8: ...ve to other mode 1 Calibration Mode Pressing and holding Calibration Switch press POWER key It displays C 0 after CAL and it blinks the version of scale three times 2 Selecting menu press TARE and then HOLD 3 ENTER Setting ZERO key MODE Function C 0 To go back to simple weighing mode C 1 To display internal value of weight C 2 C 3 Weight Setting Mode UnLoad ZERO Load ZERO after loading END on disp...

Page 9: ... TARE you may input 00 as Hexa value User can set 2 000 2 500 for low external resolution or 4 000 5 000 for high external resolution 2 1 1 2 C4 2 Setting Capacity Setting UNIT kg g lb oz C4 2 Value 2 2 000 5 80 0000 1XXX 5 5 000 10 160 0001 1XXX 10 10 000 20 400 0010 1XXX PW II has four different weight units g kg lb or oz as shown in shaded area You can set the capacity to input first 5 bits for...

Page 10: ... Calibration Setting C 3 1 Pressing and holding Calibration Switch press POWER key After CAL message blinks three times and shows the version of scale it displays C 0 message 2 Press TARE to display C 3 3 Press ZERO key and then it displays UnLOAd message 4 Press ZERO key if you want to scroll it Ú To exit from SPAN Calibration mode press TARE key when UnLOAd or LOAd message is displayed C4 5 C4 6...

Page 11: ...l acceleration value by using HOLD and TARE key 5 Press ZERO key and then G 2 message blinks 9 7994 will be shown The first digit 9 will blink 6 Input a gravitational acceleration value by using HOLD and TARE key 7 Press ZERO key to save the gravitational acceleration value and C9 END message will be shown shortly 2 1 4 Displaying Real A D Value C 5 1 Under Calibration switch on press POWER key Af...

Page 12: ...ey to decrease or HOLD key to increase the value For example when you weigh maximum capacity on the platter in case of 1 20 000 it may display 19 999 or 20 001 You can adjust up or down to 20 000 using HOLD or TARE key 5 Press ZERO to go to and display C 1 and you may scroll it at this point Then if you press ZERO key again it automatically saves Span Factor on it 2 1 6 Back to the normal weighing...

Page 13: ...on Block Diagram START C 4 C 4 1 C 4 2 교 정 단 위 외 부 분 해 능 Display Unit TARE Option C 4 6 Unit Change 표 시 단 위 C 9 Gravity 1 2 G 1 G 2 C 3 SPAN UnLOAd LOAd 3 C 1 Trim m ing 4 Factored Value LOAd Up Down END Capacity Interval C 4 4 Initial Zero ...

Page 14: ...ice Manual 14 3 The Schematics and Diagram 3 1 System Block Diagram Load Cell A D Converter ADS1100 CPU NEC 78Fseries KEY EEPROM 24C02 AMP Filter POWER DC 9V 300mA Battery_AA SIZE 1 5V x 6 LCD Driver DISPLAY LCD ...

Page 15: ...22 C0 C1 C2 C3 S TA B LE L O K 1F 1G 1E 1D 1A 1B 1C 1P 1Z S 2 S 3 S 4 HI 2A 2B 2C 2P 2Z 3F 3G 3E 3D 3A 3B 3C 3P 3Z 4F 4G 4E 4D 4A 4B 4C 4P 4Z 5F 5G 5E 5D 5A 5B 5C O Z LB K G 2F 2G 2E 2D P CS VDD AUTO POWER 2 E C11 30p R22 100 U2 XC6204C502MR 1 2 3 5 VIN V S S CE VOUT VDD FROM A D VDD KTN2222AS C C4 100u 16v R10 10k R18 2 2k JP1 1 2 B R12 10k 6100 PW2 0000 0 KTN2222AS R11 10k CAL S W C6 0 1uF POWER...

Page 16: ...urday August 26 2006 Title Size Document Number Rev Date Sheet of R21 150K VDD C105 C2 330u A4 MMZ1608Y102C L2 471u MMZ1608Y102C R17 100k VIN L1 471u L7 1 2 J2 L C CON 1 1 2 3 4 5 6 7 8 9 10 L10 1 2 SIG C18 0 1uF C20 1 uF MMZ1608Y102C VCC CHIP BEAD C9 0 1uF R16 50k VDD C105 SIG SIG U4B HA17358 5 6 7 8 4 C15 0 1uF R19 150K To L C L4 471u VIN C105 U4A HA17358 3 2 1 8 4 C7 1 uF L3 471u C16 0 1uF ...

Page 17: ...PW II Service Manual 17 4 Exploded View ...

Page 18: ...PW II Service Manual 18 5 Part Location 5 1 Main PCB Front ...

Page 19: ...PW II Service Manual 19 5 2 Main PCB Rear ...

Page 20: ...PW II Service Manual 20 5 3 BATTERY PCB ...

Page 21: ...PW II Service Manual 21 5 4 KEY PCB ...

Page 22: ...10W RR1220P 202D 2 EA 1 6527 IJ3 0022 0 RESISTOR CHIP 1 10W FTR 0805 222 JR 2 2K EA 1 6527 IJ3 0100 0 RESISTOR CHIP 1 10W FTR 0805 103 JR 10K EA 7 6527 ID3 0300 0 RESISTOR CHIP 1 10W RR1220P 303D 30 EA 2 6527 ID3 0499 0 RESISTOR CHIP 1 10W RR1220P 4992D 49 9K EA 1 6527 ID3 1000 0 RESISTOR CHIP 1 10W RR1220P 104D 100K EA 8 6527 ID3 2700 0 RESISTOR CHIP 1 10W RR1220R 274D 270K EA 2 6527 ID3 3000 0 R...

Page 23: ... 0002 0 JUMPER 2PIN SET 1 Parts Code Parts Name 규 격 Unit Q ty 6140 PPW 0000 0 PCB BATTERY 6140 PPW 0000 0 PW II EA 1 1060 A00 0010 0 BATTERY CONTACT 12 10 7 5 0 4t PORTION EA 12 1590 A00 0005 0 COIL SPRING ø0 5 ø8 2 5 4 PW EA 6 7809 CAL 0003 0 CONNECTOR WAFER LAL0640 03 LAW250 03 EA 2 7600 STA 1902 0 TACT S W 11902 DJTA 1102 EA 1 Parts Code Parts Name 규 격 Unit Q ty 6130 PPW 0000 0 PCB KEY 6130 PPW...

Page 24: ...0 MHO PORTION EA 1 13 1502 MSU 0408 0 SCREW MACHINE PH M4 8 SUS EA 3 18 1530 MSU 0510 0 BOLT WRENCH M5 1 0 10 SUS EA 6 15 16 1540 A00 0300 0 NUT HEX M3 0 5 EA 4 19 1561 MSU 0300 0 E RING ø3 ø7 0 6 SUS EA 1 21 1810 PW0 0033 0 SPEC PLATE PW 영공 STICKER 용 EA 1 8 2001 A00 0021 0 D C JACK COVER 73 9 50 2 24 PW EA 1 6 2003 A00 0001 0 FOOT ø20 17 M5 16 MW EA 4 12 2200 PW1 0233 0 KEY BOARD PAD PW 2 2kg ENG...

Page 25: ... BOX 590 315 360 PORTION 6E EA 0 2 9203 AS0 0001 0 STYROFOAM BOX 301 109 80 PORTION SET 1 9301 A00 0003 0 POLY BAG 170 250 0 05T MANUAL EA 1 9301 A00 0004 0 POLY BAG 190 260 0 03T DISPLAY EA 1 9302 A00 0005 B POLY BAG 270 350 0 04T MW PW EA 1 9400 A00 0046 0 SILICAGEL 10g EA 2 Parts Code Parts Name 규 격 Unit Q ty 8ZSW0KK00200 2kg LOADCELL SW 02L CHINA SET 1 8ZSW0KK00500 5kg LOADCELL SW 05L CHINA SE...

Page 26: ...ial zero setting range 2 or 10 of full capacity by decreasing the value of weight 7 3 Init Failure of Analog Module Init message shows up when there is some problem on analog module Please turn off the scale and turn on If you still have Init message on display please contact CAS A S service 7 4 UNSTA A D Value Unstable The scale displays UNSTA when it is in unstable status or in low power supply ...

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