Vibra AJH Series User manual

AJ(H) Series
ServiceManual

Contents
SECTION 1 TOTAL VIEW
1‑1 TOTAL VIEW OF AJ TYPE ・・・・・・・・・・・・・・1
1‑2 TOTAL VIEW OF AJH TYPE・・・・・・・・・・・・・・1
SECTION 2 ELECTRONIC CONSTRUCTION
2‑1 BLOCK DIAGRAM ・・・・・・・・・・・・・・・・・・2
2‑2 WHOLE WIRING・・・・・・・・・・・・・・・・・・・3
SECTION 3 TROUBLESHOOTING
3‑1 TROUBLESHOOTING PROCEDURE ・・・・・・・・・・・・4
3‑2 TROUBLESHOOTING TABLE ・・・・・・・・・・・・・・5
3‑3 PRIMARY CHECKS・・・・・・・・・・・・・・・・・・6
3‑4 CHECKS FOR ELECTRIC/ELECTRONIC PARTS・・・・・・・7
SECTION 4 ADJUSTMENT AND SETTING
4‑1 SPAN CALIBRATION・・・・・・・・・・・・・・・・・8
4‑2 LOCK SWITCH ・・・・・・・・・・・・・・・・・・・10
4‑3 CORNER ERROR ADJUSTMENT ・・・・・・・・・・・・・11
4‑4 ADJUSTMENT SEQUENCE FOR CASES ・・・・・・・・・・13
4‑5 RESETTING ADDRESS DATA・・・・・・・・・・・・・・14
4‑6 LINEARITY ADJUSTMENT・・・・・・・・・・・・・・・16
4‑7 CALIBRATION OF BUILT‑IN WEIGHT・・・・・・・・・・18
SECTION 5 PARTS REPLACEMENT
5‑1 HOW TO REMOVE THE CASE・・・・・・・・・・・・・・20
5‑2 HOW TO COVER THE CASE ・・・・・・・・・・・・・・21
5‑3 SEQUENCE OF MECHANISM UNIT REPLACEMENT・・・・・・22
5‑4 SEQUENCE OF TUNING‑FORK SENSOR REPLACEMENT・・・・25
5‑5 SEQUENCE OF THE AJDP CIRCUIT BOARD REPLACEMENT・・25
5‑6 HOW TO REMOVE CALIBRATION WEIGHT UNIT ・・・・・・27
5‑7 HOW TO INSTALL CALIBRATION WEIGHT UNIT・・・・・・29
SECTION 6 INSTALLATION OPTIONS
6‑1 INSTALL OF BATTERY OPTIONS・・・・・・・・・・・・30
SECTION 7 PARTS LIST
7‑1 AJ‑220〜1200・・・・・・・・・・・・・・・・・・・32
7‑2 AJ‑2200〜12K・・・・・・・・・・・・・・・・・・・34

1
SECTION1TotalView
1-1 TOTALVIEWOFAJTYPE- 220〜1200g-
1-2 TOTALVIEWOFAJHTYPE- 220〜620g,2200g,4200g-

2-1 BLOCKDIAGRAM
Micro-
Processor
ＬＣＤ
EEPROM
Oscillation
Circuit
Power
Circuit
AJDPCIRCUITBOARD
BatteryUnit
(Option)
6VDC
MECHANISM
UNIT
Tuning
Fork
ON/OFF MemorySetFunctionZero/Tare
ACAdaptor
RS232C
Driver
AJLFCIRCUIT
BOARD
AJIF
CIRCUIT
BOARD
CN1
CN3
CN5CN4
CalibrationWeightUnit
(AJHonly)
ＡＪＨ
uPD78P0308Y
AJHonly
Lock
Switch
AJ,AJH
SECTION2ELECTRONIC CONSTRUCTION
2

2-2 WHOLEWIRING
AJDPCIRCUITBOARD
MECHANISM
UNIT
Tuning
Fork
ON/OFF MemorySetFunctionZero/Tare
CalibrationWeightUnit
(AJHonly)
CN５
CN４
CN３
CN１
CN2
T1T2T3
DJBT
CN1
BatteryUnitOption
AJIF
CIRCUIT
BOARD
CN１
AJLF
CIRCUIT
BOARD
CN２
ＡＪＨ
AJHonly
Lock
Switch
AJ,AJH
3

3-1 TROUBLESHOOTINGPROCEDURE
SECTION3TROUBLESHOOTING
4

SYMPTOMSCAUSES&REMEDY
Nodisplay lightson1.AJDPboardis defective.
2.ACadaptoris defective.
3.Wrongconnectionofconnection cords inside.
4.Built-inbattery(option)is discharged.
q-nor-n
appears selftestof
segments
1.Wrongweighingpanis applied..
2.Tuning-fork sensorormechanismunitis defective.
3.AJDPboardis defective.
4.Settingofaddress data hasmistake.
5.Coefficientmemories(address data)have changed by
noisesorstatic electricity.Adjustlinearity
Display dose notget
settled down.
Display dose not
repeatcorrectly.
Zeropointdrifts.
1.Someparts such as stoppertouchesothers.
2.Weighingpantouchesotherparts.
3.Foreignsubstance is inthe scale.
4.Tuning-fork sensorormechanismunitis defective.
5.Affected by a windordisturbingoscillation.Check
environmentorworkingbase.Checkalsosettingof
stabilizationtime.See page**ofoperationmanual.
-n appears
withanetloadless
thanspecified
capacity(F.S.+9d).
1.Gross weight appliedtothe scalepan(netweight+tare
value)exceedsthe scale capacity.
2.Coefficientmemories(address data)have changed by
noisesorstatic electricity.Adjustlinearity.
3.Settingofaddress data hasmistake.
4.Calibrationweightis notcorrect.
Spanisoutof
specifiedrange.1.Tuning-fork sensorormechanismunitis defective.
2.AJDPboardis defective.
3.Settingofaddress data hasmistake.
4.Coefficientmemories(address data)have changed by
noisesorstatic electricity.
Linearityisoutof
specifiedrange.1.Tuning-fork sensorormechanismunitis defective.
2.Settingofaddress data hasmistake.
3.Coefficientmemories(address data)have changed by
noisesorstatic electricity.
4.Calibrationweightis notcorrect.
3-2 TROUBLESHOOTINGTABLE
5

SYMPTOMSCAUSES&REMEDY
Cornererroristoo
much.1.Mechanismunitis defective,such asRobervalplate(Spring)
hasbeen bentortwisted.
2.panbasetouchesotherparts.
Display suddenly
disappearedin
operation.
1.Built-inbattery(option)hasbeen consumed.
2.AJDPboardis defective.
3.ACadaptoris defective.
k-nappears.1.AJDPboardis defective.
2.Coefficientmemories(address data)have changed bynoises
orstatic electricity.Adjustlinearity.
m-nappears.1.Address data relatedtodetermine the capacity hasbeen
destroyed.･･･Contact the shipper.
2.AJDPboardis defective.
b-nappears.1.The calibrationweightis less than 1/2 F.S.
c-nappears.1.The data errorexceeds0.4%.Orperhapsthe scalemay be
defective.Contact the sipper.
3-3 PRIMARYCHECKS
1.Isanywindaroundthe site?
Isanyoscillation?Isthe workingtablestable?
2.Isanythingunderthe panbaseorthe weighingpan?
3.Isthe weighingpanrightone?
4.IsACadaptorconnected bothwiththe scaleandwiththe scale
andwiththe outletproperly?
5.Isbatteryoption chargedsufficiently?
6

3-4 CHECKSFORELECTRIC/ELECTRONICPARTS
-AJDPCircuitboard-
Checks forelectric/electronicpartsaretobe carriedoutonbackofAJDP
boardafter removingthe uppercase,at testPointsandPinsofCN1,CN4,
TP4ANDTP6.
2
2
1
3
4
5
6
7
1234
1
2
3
4
5
SHINKO
TP1
TP0
TP2
TP3
TP4
TP6
CN1
CN2
CN3
CN4
CN5
1.Checkofinputvoltage
TP0-①ofCN1・・・・・・・+8V〜+12V
2.Powervoltageinthe circuit
TP0-②ofCN4・・・・・・・+4.75V〜+5.25V
3.Checkofsignalwaves(1)
4.Checkofsignalwaves(2)
2.5V
0V
2.5V

3.5V
P-P
TP0-TP6
TP0-TP4
0V1.9〜1.3msec
(520Hz〜780Hz)
AJDP
TP5
1
1
2
3
7

4-1 SPANCALIBRATION(CAL)
SECTION4ADJUSTMENTSANDSETTINGS
1.AJType
1.Itisrecommendedtouseacalibrationweightofbetter
accuracythanthe scale.
2.The calibrationisavailablewith 1/2 ofF.S.Nevertheless,itis
recommendtousweightclosertoF.S.foraccurate calibration.
3.Errormessages:
n:The calibrationweightisoverthe full capacity
bn:The calibrationweightisless than 1/2 ofthe capacity.
cn:The dataerrorexceeds1%.Orperhapsthe scale
may bedefective.
8