Tektronix TAS 465 Bedienungsanleitung

Service Manual

TAS 465

Analog Oscilloscope

B020100 and Above

070-9403-00

Warning

The servicing instructions are for use by qualified

personnel only. To avoid personal injury, do not

perform any servicing unless you are qualified to

do so. Refer to all safety summaries prior to

performing service.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes

that in all previously published material. Specifications and price change privileges reserved.

Printed in the U.S.A.

Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

  "-1& " *0( i

(" +# +*/"*/.

&./ +# &$0-". 1&&

&./ +# (". 3&

#"/4 0))-4 3&&&

4)+(. *! "-). 3&&&

," &#& -" 0/&+*. 3&1

-"# " 31&&

"(/"! *0(. 31&&&

," &#& /&+*.

-+!0 / ". -&,/&+* 6

."- */"-# " 6

  

  

      

   

"-/& ( 4./") 6

+-&5+*/( 4./") 6

-&$$"- 4./") 6

".0-")"*/ 0-.+-. 6

+)&*( -&/. 6

--*/"! %- /"-&./& . 6

"-#+-)* " +*!&/&+*. 6

4,& ( %- /"-&./& . 6

,"-/&+*

*./((/&+* *! +2"- * 6

0& ' /-/ 6

"(" /&*$ *! "."(" /&*$ *,0/ %**"(. 6

.&*$ /%" "*0. 6

+**" /&*$  &$*( 6

.&*$  6

+),"*./&*$ /%" -+" 6

"*0 , 6

" % %$)$)(

%$)$)(

%'- % &') %$

 '* ) (' &) %$ .

%  %$+$) %$( .

%*" $)'%$$) %$ .

$"% %' .

Attenuators A1 3Ć4........................................

Probe Coding Interfa e A1 3Ć4.............................

Analog A quisition Hybrid A1 3Ć4...........................

External Trigger A1 3Ć4....................................

'%((%' -()# .

Pro essor Subsystem A5 3Ć4...............................

ROM/RAM Subsystem A5 3Ć5..............................

Readout Subsystem A5 3Ć5................................

FrontĆPanel Interfa e Subsystem A5 3Ć5.....................

Analog Board Interfa e Subsystem A5 3Ć5...................

 (&"- ((#"- .

Verti al Output A3 3Ć6.....................................

Horizontal Output A3 3Ć6..................................

High Voltage A3 3Ć6.......................................

'%$) $" .

Menu Swit hes A4 3Ć7.....................................

CPU A4 3Ć7..............................................

FPP Pots & Probes A4 3Ć7.................................

LEDs & Driver A4 3Ć7......................................

Swit hes A4 3Ć8..........................................

%,' *&&"- .

$ .

'%'#$ '  ) %$

$'" $()'*) %$( .

( $ ) '  '%'#$ !( '%*'( .

( $ ) '%'#$ ()( '%*'( .

%$+$) %$( .

'  '%'#$ !( .

%,'.$ " ()( .

*$) %$" ()( .

Fun tional Tests Prerequisites 4Ć4...........................

Verify the Probe Compensator Output 4Ć4...................

Verify the Input Channels 4Ć5...............................

Verify the Alt/Chop and Add Fun tions 4Ć6...................

Verify the Time Base 4Ć6...................................

Verify the Trigger System 4Ć7...............................

Verify the External Trigger 4Ć9..............................

! $ $#)#)(

  '+ #*! iii

"%')*' $"%#()$# !')$#( .

Horizontal Sweep Path 4Ć9.................................

Vertical Signal Path 4Ć11....................................

'$'"# ()( .

'$'"# ()( ''&*()( .

&*%"#) &*' .

')! ,()"  ( .

Check DC Gain and Voltage Measurement Accuracy 4Ć15......

Check Trigger Level Accuracy 4Ć16..........................

Check DC Coupling Bandwidth 4Ć17.........................

Check ĆAxis Gain 4Ć19.....................................

$'-$#)! ,()"  ( .

Check Time Base and Time Cursor Accuracy 4Ć20.............

Check Dual Delay Accuracy 4Ć22............................

'' ,()"  ( .

Check Trigger Sensitivity 4Ć24...............................

Video Trigger Sensitivity 4Ć29................................

*()"#)

*()"#) '$*'( .

&*'"#)( $' '$'"# .

Personnel 5Ć1............................................

Access to Adjustments 5Ć1.................................

WarmĆUp Period 5Ć1......................................

&*%"#) &*' .

'$'"# ) *()"#) '$*'( .

Complete Adjustment 5Ć3..................................

Partial Adjustment 5Ć3.....................................

Adjustment Dependencies 5Ć3.............................

*()"#) #()'*)$#( .

Power Supply Adjustment 5Ć4..............................

CRT Adjustments 5Ć5.....................................

Low Frequency Output Compensation 5Ć6...................

Factory Horizontal Cal 5Ć8.................................

Factory Vertical Cal 5Ć12....................................

High Frequency Step Response 5Ć15.........................

Attenuator Compensation 5Ć16..............................

Vertical Gain Adjust (Cabinet On) 5Ć18........................

(" +# +*/"*/.

+*/"*/.

&*/"** "

&*/"** " *#+-)/&+* 5

"#+-" "-1& &*$ 5

"'/-+*&3 "-1& " 5

Warranty Service 6Ć1......................................

Repair or Calibration Service 6Ć2............................

"(# "-1& " 5

-"1"*/&*$  5

*.," /&+* *! ("*&*$ 5

"*"-( -" 5

*.," /&+* *! ("*&*$ -+ "!0-". 5

Inspection Ċ Exterior 6Ć6..................................

Cleaning Proce ure Ċ Exterior 6Ć6.........................

Cleaning Proce ure Ċ Interior 6Ć7..........................

Cleaning the CRT Implosion Shiel 6Ć7......................

")+1( *! *./((/&+* -+ "!0-". 5

-",-/&+*6 ("." "! 5

Cable Removal 6Ć9.......................................

General Instructions 6Ć10...................................

Summary of Proce ures 6Ć10...............................

&*" +-! *! &*" 0." 5

Line Cor 6Ć14............................................

Line Fuse 6Ć15............................................

-+*/5*"( *+. *! %#/. 5

Removing FrontĆPanel Knobs an Shafts 6Ć16.................

Installing FrontĆPanel Knobs an Shafts 6Ć16..................

""/ "- +1"- *! &*"/ 5

Rear Cover 6Ć18...........................................

Cabinet 6Ć18..............................................

Replacing the Front Feet 6Ć18...............................

-+*/5*"( -&) "*0 *! +2"- 0//+*.  .'"/ 5

Removing the Front Trim 6Ć18...............................

Menu Buttons an Elastomer 6Ć19...........................

Power Button Replacement 6Ć19.............................

Installing the Front Trim 6Ć19................................

Installing the EMI Gaskets 6Ć20..............................

 -+*/ *"( +!0(" ")+1( 5

FrontĆPanel Mo ule Disassembly/Assembly 6Ć22..............

Reassembly of the Front Panel Mo ule 6Ć24...................

"*0 ("3 &- 0&/ ",( ")"*/ 5

 *(+$ +-! 5

&.,(4 -&1"- +-!  5

 ),(+.&+* %&"(! 5

Table of Contents

TAS 465 Service Manual v

Fan and Fan Mount 6Ć30......................................

     "

     "

CRT 6Ć32.....................................................

  "

  "

CRT Light Guide 6Ć36.........................................

CRT Front Bracket 6Ć36.......................................

A2 Display Control Board 6Ć37.................................

A63 Power Supply Module 6Ć38................................

  !  "

  !  "

Troubleshooting 6Ć41.............................................

Troubleshooting Procedure 6Ć41...............................

Equipment 6Ć41..............................................

Symptom Matrix 6Ć42.........................................

Repackaging Information 6Ć51....................................

Options

Options A1-A5: International Power Cords 7Ć1................

arrantyĆPlus Service Options 7Ć1............................

Option 3R: Rackmount 7Ć1...................................

Option 02: Front Cover and Pouch 7Ć2........................

Option 23: Additional Probes 7Ć2.............................

Option 9C: Certificate of Calibration and Test Data Report 7Ć2..

Replaceable Electrical Parts List

Diagrams

Diagrams and Circuit Board Illustrations 9Ć1......................

Symbols 9Ć1................................................

Component Values 9Ć1.......................................

Graphic Items and Special Symbols Used in This Manual 9Ć1...

Component Locator Diagrams 9Ć2............................

Replaceable Mechanical Parts List

  



    vii

  

Figure 2Ć1:ăRear Panel 2Ć1........................................

Figure 2Ć2:ăFuse Compartment 2Ć2................................

Figure 2Ć3:ăPOWER Button 2Ć2....................................

Figure 2Ć4:ăProbe Compensation Signal Displayed after AUTOSET 2Ć5.

Figure 2Ć5:ăConnections for Compensating a Probe 2Ć5..............

Figure 2Ć6:ăHow Probe Compensation Affects Signals 2Ć7............

Figure 2Ć7:ăLocation of Probe Head Adjustment 2Ć7..................

Figure 2Ć8:ăMenu Map 2Ć8........................................

Figure 3Ć1:ăBlock Diagram 3Ć2....................................

Figure 4Ć1:ăGraticule References 4Ć2...............................

Figure 4Ć2:ăTest Hookup for Functional Tests 4Ć4....................

Figure 4Ć3:ăHorizontal Adjustments (One) 4Ć10.......................

Figure 4Ć4:ăHorizontal Adjustments (Two) 4Ć10.......................

Figure 4Ć5:ăHorizontal Adjustments (Three) 4Ć11......................

Figure 4Ć6:ăGain and oltage Test Setup 4Ć15........................

Figure 4Ć7:ăTrigger Level Test Setup 4Ć17............................

Figure 4Ć8:ăBandwidth Test Setup 4Ć18..............................

Figure 4Ć9:ăXĆAxis Gain Test Setup 4Ć19.............................

Figure 4Ć10:ăTiming Test Setup 4Ć20................................

Figure 4Ć11:ăDual Delay Test Setup 4Ć23.............................

Figure 4Ć12:ăTrigger Sensitivity Test Setup (One) 4Ć25.................

Figure 4Ć13:ăTrigger Sensitivity Test Setup (Two) 4Ć26.................

Figure 4Ć14:ăTrigger Sensitivity Test Setup (Three) 4Ć27................

Figure 4Ć15:ăTrigger Sensitivity Test Setup (Four) 4Ć27.................

Figure 4Ć16:ă ideo Trigger Test Setup 4Ć29...........................

Figure 5Ć1:ăLocation of Boards for Adjustments 5Ć2..................

Figure 5Ć2:ăCRT Adjustments Calibration Setup 5Ć5..................

Figure 5Ć3:ăLow Frequency Output Compensation Calibration

Setup 5Ć7...................................................

Figure 5Ć4:ăHorizontal Adjustments (One) 5Ć9.......................

Figure 5Ć5:ăHorizontal Adjustments (Two) 5Ć9.......................

Figure 5Ć6:ăHorizontal Adjustments (Three) 5Ć10......................

Figure 5Ć7:ăHorizontal Output Calibration Setup 5Ć11..................

Figure 5Ć8:ăFactory ertical Calibration Setup 5Ć13....................

Figure 5Ć9:ăExternal Trigger Calibration Setup 5Ć13...................

Figure 5Ć10:ă ertical Adjustments 5Ć14..............................

Figure 5Ć11:ăAdjusting ertical Gain and Centering 5Ć15...............

  



viii

Figure 5Ć12:ăHigh Frequency Step Response Test Setup 5Ć16..........

Figure 5Ć13:ăAttenuator Compensation Test Setup 5Ć17................

Figure 5Ć14:ăDisplay Driver Board Adjustment Locations 5Ć20..........

Figure 5Ć15:ăAnalog Board Adjustment Locations 5Ć21................

Figure 5Ć16:ă ower Supply Adjustment Location 5Ć22.................

Figure 5Ć17:ăLocation of J205 (CAL-DIS) on the C U Board 5Ć23......

Figure 6Ć1:ăOscilloscope Orientation 6Ć10............................

Figure 6Ć2:ăCabinet and FrontĆ anel Mounted Modules 6Ć12...........

Figure 6Ć3:ăInternal Modules 6Ć13...................................

Figure 6Ć4:ăCables and Cable Routing 6Ć14..........................

Figure 6Ć5:ăLine Fuse and Line Cord Removal 6Ć15...................

Figure 6Ć6:ăKnob and Shaft Removal 6Ć16...........................

Figure 6Ć7:ăRear Cover, Cabinet, and Feet Removal 6Ć17..............

Figure 6Ć8:ăTrim Ring and Menu Buttons Removal 6Ć20................

Figure 6Ć9:ăEMI Gasket Installation 6Ć21.............................

Figure 6Ć10:ăA62 Front anel Module Removal 6Ć22...................

Figure 6Ć11:ăDisassembly of FrontĆ anel Assembly 6Ć23...............

Figure 6Ć12:ăFrontĆ anel Ground Spring 6Ć24........................

Figure 6Ć13:ăMenu Flex Circuit Board Removal 6Ć25...................

Figure 6Ć14:ăA1 Analog Board Removal 6Ć27.........................

Figure 6Ć15:ăLocation of Display Driver Board 6Ć28....................

Figure 6Ć16:ăCRT Implosion Shield Removal 6Ć29.....................

Figure 6Ć17:ăFan Mount Removal 6Ć30..............................

Figure 6Ć18:ăFan and Fan Mount Removal 6Ć31.......................

Figure 6Ć19:ăCRT Rear Bracket and Ground Wire 6Ć33.................

Figure 6Ć20:ăCRT Removal 6Ć35....................................

Figure 6Ć21:ăRemoving the CRT Front Bracket 6Ć37...................

Figure 6Ć22:ăRemoving the Display Control Board 6Ć38................

Figure 6Ć23:ă ower Button Shaft Disconnect 6Ć39.....................

Figure 6Ć24:ă ower Supply Removal 6Ć39............................

Figure 6Ć25:ăA5 C U Board Troubleshooting rocedure 6Ć44...........

Figure 6Ć26:ăA1 Analog Board Troubleshooting rocedure 6Ć45........

Figure 6Ć27:ăA3 Display Driver Board Troubleshooting rocedure 6Ć47..

Figure 6Ć28:ăA62 Front anel Module Troubleshooting rocedure 6Ć49..

Figure 6Ć29:ăA2 Display Control Board Troubleshooting rocedure 6Ć50.

Inhaltsverzeichnis

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