ServiceManualYo kogawa Electric CorporationModel 437101/437102/437103/437104/437106/437112/437118/437124µR20000SM 04P02B01-01E1st Edition
1-3SM 04P02B01-01EPrinciples of Operation1Display / Panel Keys• Offers a variety of display types, with a fluorescent character display tube (VFD) of1
2-1SM 04P02B01-01ETroubleshooting22.1 Failure Analysis and Repair ProceduresThis section describes failure analysis and repair procedures.Failure Anal
2-2 SM 04P02B01-01E2.2 Failures and Corrective ActionsThe table below describes the most common types of failures and their correctiveactions.ActionRe
2-3SM 04P02B01-01ETroubleshooting2ActionRefer to chapter 6DescriptionPhenomenonNo.PageItemCheckAdjustReplace10 (Dot Model) Whether the recorder has s
3-1SM 04P02B01-01ETesting3Chapter 3 Testing3.1 Acceptance TestThis section describes the procedure to perform the acceptance test.1. Read the preface
3-2 SM 04P02B01-01E3.2 Self Diagnostic TestThe recorder is provided with complete self diagnostic functions to enhance reliability inmeasurement and s
3-3SM 04P02B01-01ETesting33.3 Performance TestsRead the warning and cautions below before beginning tests.WARNING• Circuit patterns of the printed cir
3-4 SM 04P02B01-01EKey Operations on the RecorderThe recorder has the following modes. The following is an explanation of how to enterand exit each mo
3-5SM 04P02B01-01ETesting3The Test/Adjustment Mode Menu (Pen Model)PasswordPassword(6301)(7098)Pos_AdjustTestEndAux VrefPen speedZeroFullKeyDispRemote
3-6 SM 04P02B01-01EThe Test/Adjustment Mode Menu (Dot Model)Password(7098)(6301)PasswordPos_AdjustTestEndAux VrefRib. shiftHysteresisZeroKeyDispRemote
iSM 04P02B01-01EImportant Notice to the User• This manual contains information for servicing YOKOGAWA’s µR20000. Check theserial number to confirm tha
3-7SM 04P02B01-01ETesting3TestsThe following is a list of the tests of the µR20000.• Insulation Resistance• Protective Grounding• Withstand Voltage• M
3-8 SM 04P02B01-01E3.4 Test ProceduresInsulation Resistance● ProceduresPerform a measurement with an insulation tester and check whether the results m
3-9SM 04P02B01-01ETesting3Withstand Voltage● ProceduresPerform the test with a withstanding voltage tester, and check whether the resultsmeet the crit
3-10 SM 04P02B01-01E● ProceduresWarm up the instrument for thirty minutes before performing the test. Set the rangeson the recorder, and input the val
3-11SM 04P02B01-01ETesting3Channel-to-Channel Error● ProceduresPen ModelAssign inputs as shown in the table below in parallel to channels 1 and 2, and
3-12 SM 04P02B01-01EReference Junction Compensation Accuracy● ProceduresSet all channels to thermocouple type T. Measure 0°C on one of the channels an
3-13SM 04P02B01-01ETesting3Keys● Procedures1. Turn ON the power switch while pressing the MENU and CH UP keys. Menu =A/D Adjust is displayed.2. Select
3-14 SM 04P02B01-01ERecording Accuracy● OverviewSet the channels to the 2 V range and confirm that the recording accuracy is withinthe criteria.Pen Mo
3-15SM 04P02B01-01ETesting3Dead Band (Pen Model)● ProceduresCheck the accuracy of all pens. Use standard pens (or equivalent).*A “standard pen” is one
3-16 SM 04P02B01-01EInk Bleed (Dot Model)● Procedures1. Turn ON the power switch while pressing the MENU and CH UP keys. Menu =A/D Adjust is displayed
ii SM 04P02B01-01EIntroductionThis manual contains information for servicing YOKOGAWA’s µR20000.NoteThis is the first edition of the manual, dated Mar
3-17SM 04P02B01-01ETesting3When the /F1 Option is Not InstalledRelay Relay No.I01-I06 I01-I06I11-I16 I11-I16I21-I26 I21-I26I31-I36 I31-I36When the /F1
3-18 SM 04P02B01-01ELoop Back Test (Ethernet Communication Interface, /C7)● ProceduresThis test performed when the /C7 option is specified.1. Connect
4-1SM 04P02B01-01EAdjustments4Chapter 4 Adjustments4.1 Before Making AdjustmentsThis chapter describes adjustments of the A/D converters, recording po
4-2 SM 04P02B01-01E4.2 Adjustments to the Pen ModelAdjusting the A/D Converters● OverviewEnter the value determined for each range, perform measuremen
4-3SM 04P02B01-01EAdjustments4● ProcedureThe following explains the procedure when working with channel 1.1. Press the MENU and CH UP keys while turni
4-4 SM 04P02B01-01E15. With End = Store displayed, press the key.The adjusted value is saved to the A/D converter.End=StoreConcluding Adjustments16.
4-5SM 04P02B01-01EAdjustments48. When all pen adjustments are finished, select Mode = End, then press the key.Mode=End9. With End = Store displayed, p
4-6 SM 04P02B01-01EAdjusting the Zero Position4. Select P_Adj = Zero, then press the key.P_Adj=Zero5. Select the number of the pen to adjust, then pr
4-7SM 04P02B01-01EAdjustments44.3 Adjustments to the Dot ModelAdjusting the A/D Converters● OverviewEnter the value determined for each range, perform
4-8 SM 04P02B01-01E● Procedure1. Press the MENU and CH UP keys while turning ON the power. Menu = A/DAdjust is displayed.2. With Menu = A/D Adjust is
iiiSM 04P02B01-01EWARNING• Power SupplyEnsure that the source voltage matches the voltage of the powersupply before turning ON the power.• Protective
4-9SM 04P02B01-01EAdjustments4Adjusting the Ink Ribbon● OverviewThis is an adjustment of the position of the ink ribbon. The adjustment is performedwh
4-10 SM 04P02B01-01EAdjusting the Printer Position● OverviewThis is an adjustment of the printer position to make the recording position 0 to 180mm. T
4-11SM 04P02B01-01EAdjustments4Adjusting the Full Position9. Select P_Adj = Full, then press the key.The adjustment value input screen in displayed.P
4-12 SM 04P02B01-01EAdjusting the Height of the Carriage● OverviewThis is an adjustment of the clearance between the carriage and the platen. Theadjus
5-1SM 04P02B01-01ESchematic Diagram5Chapter 5 Schematic Diagram5.1 Schematic Diagram (Pen Model)OPTION TERMINAL 1CN1(RS422 OR NO)B8800NA(from NA to NP
5-2 SM 04P02B01-01E5.2 Schematic Diagram (Dot Model)CN1CN2CN9CN7JOINT BOARDCN3B8802SACN8CN5CN4CN1B8803SADOT DRIVER BOARD TO RIBBON FEEDMOTORTO CARRIAG
6-1SM 04P02B01-01ECustomer Maintenance Parts List66.1 Customer Maintenance Parts List (Pen Model)1324Note: Parts marked with a symbol are
6-2 SM 04P02B01-01EComplete SetItem Qty DescriptionDoor AssemblyCase AssemblyName Plate (B9900CR) (not /H5[ ])Terminal AssemblyPanel AssemblyCPU Boar
6-3SM 04P02B01-01ECustomer Maintenance Parts List6Case and Door AssemblyNote:(CMP)243175610891211QtyItem Part No. DescriptionModel43710243710343710443
6-4 SM 04P02B01-01ENote:(CMP)Chart Cassette and Display AssemblyItemPart No.QtyDescriptionItemPart No.QtyDescriptionB8802CA Display Assembly11B8
iv SM 04P02B01-01EOverview of This ManualThis manual is meant to be used by qualified personnel only. Make sure to read thesafety precautions at the b
6-5SM 04P02B01-01ECustomer Maintenance Parts List6Frame and Chart Motor AssemblyItemPart No.QtyDescriptionB8802SB Pen Driver PCB11B9905PZFPC Clamp21B
6-6 SM 04P02B01-01E345791116810222213 13131620Pen Servo and Plotter Assembly (1/2)1214151817181921222324 252627282930303132333435363637383940416.1 Cu
6-7SM 04P02B01-01ECustomer Maintenance Parts List6Note:(CMP)QtyItem Part No. DescriptionModel437102437103437104437101123456789101112131415161718192011
6-8 SM 04P02B01-01ECPU and Rear Panel Assembly (1/2)16457233317 1615141312891810112221221920303129242628 3025 2723276.1 Customer Maintenance Parts Li
6-9SM 04P02B01-01ECustomer Maintenance Parts List6Note: *1 Option or /A1/A2/A3/A4/F1/R1QtyItem Part No. DescriptionModel43710243710343710443710112345
6-10 SM 04P02B01-01ETerminal Assembly (1/3)12367845121610119141315192119181721202223100-240V 50/60Hz 55VA MAX6.1 Customer Maintenance Parts List (Pe
6-11SM 04P02B01-01ECustomer Maintenance Parts List66.1 Customer Maintenance Parts List (Pen Model)Terminal Assembly (2/3)Note: (CMP)ItemPart No.Qty
6-12 SM 04P02B01-01ETerminal Assembly (3/3)Option Terminal Suffix Code (Options)B8800MAB8800NAB8800MBB8800NBB8800MCB8800NCB8800MDB8800NDB8800MEB8800N
6-13SM 04P02B01-01ECustomer Maintenance Parts List6Standard Accessories14235QtyModel437101437102437103437104Item Part No. Description12B9573ANB9900BX
6-14 SM 04P02B01-01EPortable Type ( /H5[ ])Note:(CMP)100-240V50/60Hz55VA MAX2516578 923424 13 23 22 21201819161716151413121110DescriptionItem Part No
vSM 04P02B01-01E1234567ContentsImportant Notice to the User ...
6-15SM 04P02B01-01ECustomer Maintenance Parts List66.2 Customer Maintenance Parts List (Dot Model)Note: Parts marked with a symbol are C
6-16 SM 04P02B01-01EComplete SetItem Qty DescriptionDoor AssemblyCase AssemblyName Plate (B9900CR) (not /H5[ ])Terminal AssemblyPanel AssemblyCPU Boa
6-17SM 04P02B01-01ECustomer Maintenance Parts List6Case and Door Assembly243175610891211Note:(CMP)QtyItem Part No. DescriptionModel4371124371184371244
6-18 SM 04P02B01-01EChart Cassette and Display AssemblyNote:(CMP)122568727 2653491011131214151415161718 19232024252221Item Part No.QtyDescription
6-19SM 04P02B01-01ECustomer Maintenance Parts List6Frame and Chart Motor Assembly123446789101091010111213131416171815192021225Note:(CMP)Item Part No.
6-20 SM 04P02B01-01E123456789101112131415161819172021222317233424253332262728293031Frame and Carriage Assembly (1/2)6.2 Customer Maintenance Parts Li
6-21SM 04P02B01-01ECustomer Maintenance Parts List6Frame and Carriage Assembly (2/2)QtyItem Part No. Description11111B8803BG Motor Bracket Assembly21
6-22 SM 04P02B01-01ECPU and Rear Panel Assembly (1/2)11101234353536914121317181920323129302125 23 26 28 252824 22 27161543336758336.2 Customer Mainte
6-23SM 04P02B01-01ECustomer Maintenance Parts List6CPU and Rear Panel Assembly (2/2)Note:(CMP)QtyModel437106437112437118437124Item Part No. Descripti
6-24 SM 04P02B01-01ETerminal Assembly (1/5)123456789181910121113141615172022211928242334353637383839403332313029272725266.2 Customer Maintenance Part
vi SM 04P02B01-01EChapter 4 Adjustments4.1 Before Making Adjustments ...
6-25SM 04P02B01-01ECustomer Maintenance Parts List66.2 Customer Maintenance Parts List (Dot Model)Note:(CMP)Terminal Assembly (2/5)Item Part No. Qty
6-26 SM 04P02B01-01E6.2 Customer Maintenance Parts List (Dot Model)Note:(CMP)Terminal Assembly (3/5)Item Part No. Qty Description25 B8801CV 1 Input
6-27SM 04P02B01-01ECustomer Maintenance Parts List66.2 Customer Maintenance Parts List (Dot Model)Terminal Assembly (4/5)Option Terminal Suffix Code
6-28 SM 04P02B01-01E6.2 Customer Maintenance Parts List (Dot Model)Terminal Assembly (5/5)Option Terminal Suffix Code (options)B8800MAB8800MBB8800MCB
6-29SM 04P02B01-01ECustomer Maintenance Parts List66.2 Customer Maintenance Parts List (Dot Model)SparesNote:*1 Part number: B9573AN Minimum o
6-30 SM 04P02B01-01EPortable Type ( /H5[ ])Note:(CMP)DescriptionItem Part No. QtyB8802GE 11Cover AssemblyB9905KX 32CollarY9406LB 33Screw (M4x6)Y9304L
7-1SM 04P02B01-01EReplacing Parts7Chapter 7 Replacing Parts7.1 Before Replacing PartsNotes When Replacing Parts• Replacement of parts can only be perf
7-2 SM 04P02B01-01E7.2 Replacable PartsThe recommended replacement periods for wearable parts (ones with limited lifespans)is given in the table below
7-3SM 04P02B01-01EReplacing Parts77.3 Disassembly Procedure (Common Items)This is a description of the disassembly procedures that are common to the d
7-4 SM 04P02B01-01E7.3 Disassembly Procedure (Common Items)5. Loosen the screw on the back of the FPC and open the internal unit.(Screw tightening to
1-1SM 04P02B01-01EPrinciples of Operation1Chapter 1 Principles of Operation1.1 Principles of OperationThe following explains the principles of operati
7-5SM 04P02B01-01EReplacing Parts7Display Assembly (B8802CA) [Item 1 on pages 6-4 and 6-18]1. Open the internal unit.2. Remove the Display Assembly F
7-6 SM 04P02B01-01E5. Pull the Display Assembly toward you, then pull the support point on the rightside of the Display Assembly.PullSupport point6. R
7-7SM 04P02B01-01EReplacing Parts7Chart Paper Feed Motor (B9905GS) [Item 11 on page 6-5 and itme 15 on page 6-19]1. Remove the internal unit.2. Remov
7-8 SM 04P02B01-01E7.4 Disassembly Procedure (Pen Model)Plotter Carriage (B9905NB) [Item 22 on page 6-6]Plotter Motor (B9905NS) [Item 27 on page 6-6
7-9SM 04P02B01-01EReplacing Parts76. Remove the two screws securing the Shaft.(Screw tightening torque: 0.59 to 0.69 N·m).ScrewScrewMain Shaft7. Remov
7-10 SM 04P02B01-01EPen Servo Assembly (B8802EF) [Item 2 on page 6-6]CAUTION• If any foreign material adheres to the mechanism of the Pen Servo Assem
7-11SM 04P02B01-01EReplacing Parts77.4 Disassembly Procedure (Pen Model)5. Remove the screw securing the Pen Base Bracket and Servo Top Cover.(Screw
7-12 SM 04P02B01-01E9. Remove the three pins securing the Pen Servo Assembly.The tips of the pins form latches. To remove them, squeeze the tips using
7-13SM 04P02B01-01EReplacing Parts77.4 Disassembly Procedure (Pen Model)12. Pull out the Pen Arm Shaft and Spring from the Pen Carriage.Pen Arm Shaft
7-14 SM 04P02B01-01E7.5 Disassembly Procedure (Dot Model)Ribbon Feed Motor (B9906GL) [Item 22 on page 6-20]Ribbon Feed Gear (B9906GN, B9901HM, B9901H
1-2 SM 04P02B01-01EA/D ConverterASICUses a proprietary one-chip ASIC. The ASIC is a combination analog/digital IC thatcontains popular CMOS processes.
7-15SM 04P02B01-01EReplacing Parts75. Remove the latch from the Holder Lock on the right panel, then slide it to the leftside and remove the Holder Lo
7-16 SM 04P02B01-01ECarriage Assembly (B8803BB) [Item 24 on page 6-20]Pully (B9901EY) [Item 30 on page 6-20]CAUTIONDo not apply lubricant to the Sha
7-17SM 04P02B01-01EReplacing Parts77.5 Disassembly Procedure (Dot Model)6. Remove the two screws securing the Pulley Bracket.(Screw tightening torque
7-18 SM 04P02B01-01ECarriage Motor (B9906FX) [Item 13 on page 6-20]1. Remove the internal unit.2. Remove the cable extruding from the Carriage Assemb
7-19SM 04P02B01-01EReplacing Parts77.5 Disassembly Procedure (Dot Model)7. Remove the two screws and M3 hex screw, remove the Plate and Drive Pulley.
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