Tektronix 11A32 Service Reference Manual Download Page 1

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MANUAL

Product Group 47

Two Channel Amplifier
Service Reference

WARNING

The following servicing instructions are for use by qualified person-

nel only. To avoid personal injury, do not perform any servicing

unless you are qualified to do so. Refer to the Safety Summary
prior to performing any service.

P/ease check for

CHANGE

INFORMATION at

the

rear

of this

manual.

First Printing OCT

Summary of Contents for 11A32

Page 1: ...servicing instructions are for use by qualified person nel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to the Safety Summary prior to performing...

Page 2: ...ermission for distribution of such documents to any GTDEP user that is a full participant in the Metrology Data Interchange Data Base of GIDEP provided that all copies of the original work include the...

Page 3: ...e digits The country of manu facture is identified as follows E000000 1woooo 2oMx300 3000000 7000000 Tektronix Inc Beavenon Oregon USA Tektronix Guernsey Ltd Channel Islands Tektronix United Kingdom L...

Page 4: ...ocedureParts Part 1 Initial Setup Part 2a Exnmiw Adjust Sfep Response Standard Pr cdurc Examine Mainfrrsmc Step Responzc ExaminciAdjust Plug ln Step Rzsponsr AIR1015 AlR1025 Pan 2h Exnmine Adjust Step...

Page 5: ...2 Self TcstExtended Diagnostics 3 24 New Configuration Calibration 3 25 Field Replaceable Unit FRU Guide 3 25 Abbreviations of FRU Names 3 26 Abbreviations of Component and Module Names 3 26 ErrorInde...

Page 6: ...ahle Units FRU locator and Al Main board securiny hardware 3 h Scmiconductnr indexing dingram 3 8 Hypwn assembly removal and replacement 3 10 IC Insertion Extraction Pliers 3 14 Localion of 5crews and...

Page 7: ...able 2 4 Table 2 5 Tnhlc 3 l TestEquipment 2 3 llA32 BandwidthTable 2 14 11A32DCBala nceTahle 2 18 llA32aVDCAccuracyTable 2 20 llA32 DC Offset Accuracy Table 2 22 Relative Susceptibility to Damagc Fro...

Page 8: ...damagc to the equipment or other propwty WARNING statements identify wnditions or practices that could result in personal injury or loss of life CAUTION indicates personal injury hazard not immediatel...

Page 9: ...ly wired rcccptacle foreconnecting to the product input or output terminals A protcclivc ground connection by way of the grounding conductor in the mainframe power cord is essential fat sale operation...

Page 10: ...functions The plug in front panel has a momentary pushbut ton and a back lighted display on indicator for each input channel Orher controls and statw indicators are located on the mainframe Input impe...

Page 11: ...o prevent damage to the instrument If the green indicator light remains ON when the STANDBYposition is selec6ed 6hen the switch has been left internally disabled afkr the servicing of the power supply...

Page 12: ...AME RELEASE LA 03 Figure l l Installing a plug in in mainframe oscilloscope Instrument Options The u fmner can order Option 22 which includes two P6134 probzs General Information llA32 Service Kcfcren...

Page 13: ...Tightly pack dunnage or urethane foam between the carton and the instrument to cushion the plug in on all sides Allow three inches of packing on each side Seal the carton with shipping tape or with in...

Page 14: ...orage at temperatures outside the operating limits allow the chassis to reach the operating temperature range before applying power Enhanced system accuracy is available after a 20 minute warmup perio...

Page 15: ...ectors cantrols and indicators for example Position on associated lest equipment Initial capital letters also identify ad justments inside the plug in for example Vert Pas A heading system is used to...

Page 16: ...re information on inittahzation refer to the mainframe User s Reference manual Test Equipment Table 2 l contains suggested test equipment used with the Checks and Adjustment Procedure Procedure steps...

Page 17: ...inch male BNC connectors BNC Female to Clip lends Impedance 50 tI one male and one female BNC connector BNC Female to Dual Banana BNC T Two female and one male BNC wnnecto Exanlples of Applicuhlc Test...

Page 18: ...ing 1 W Insulated slot Holder for Ton tips G tip 7 tip 8 tip IO tip 15 tip IC Insertion Extraction Pliers 28 pin type Examples of Applifahk Test Equipment Tektronix Part 011 0049 01 Tektronix Part 303...

Page 19: ...that it is wnrtned up with the instrument to be tested Power Supply Calibration Generator Leveled Sine Wave Generators Digital Voltmeter With the ON STANDBY switch set to STANDBY connect the mainframe...

Page 20: ...dure at the end of this part First the Signal Standardizer provides a reference waveform to characterize the mainframe Mainframe aberrations are displayed at 2 per division men the waveform is compare...

Page 21: ...pe Mniefrnme M a i n Sire 2 nsldlv Trig Level 40 MainPas position positive pulse wansirion one division from left edge of graticulc Acquire Description bmplilude 5 div vertical Step Orcilloscopc Mainf...

Page 22: ...In CH IDisplayon off _ _ on Oscilloscope Mainframe Verl Size 50 mV dlv lmpedance 50R MalnSlze 1 ps dlv MalnPos position positive going edge to first graticule lint from left edge of graticulc Pwer TD...

Page 23: ...arc within 4 5 peak 2 25 divisions and 7 peak to peak 3 5 divisions Refer to Figure 2 l for adjustment locations c Remove the displayed waveform 1 Move the Pulser to the CH 2 input connector Then rep...

Page 24: ...02 mainframe is available Performance is assured only for the particular plug in and mainframe combination examined and adjusted in this procedure Plug in and mainframe aberrations are displayed at 20...

Page 25: ...w Pulrer TV L tiggc rcd Lcvcl _ Fully clockwiac Oscilloscope Mainframe ONISTANVBY switch _ _ _ _ ON Wait for calihrarion cycle to complete lltiliry menu Initialize Center Plug h Verl Size 50 mV div Im...

Page 26: ...0 UJK T HEl RlOlS on the Al Main board 50 that the aberrations are within 4 5 peak 0 225 division and 7 peak to peak 0 35 division Refer to Figure 2 I for adjustment locations Remove the displayed wav...

Page 27: ...wer bandwidth Specification Refer to Table 2 2 Setup Oscilloscope l H Leveled Sine Wave Generator n output P 10X Attenuator not connectad yet Coaxial Cable First Initialize the oscilloscope s settings...

Page 28: ...ude as shown in the Reference Amplitude columns b Set the Leveled Sine Wave Generator frequency as shown in the Frequency column according the mainframe type you are using c CMJCK that the displayed a...

Page 29: ...Measurement Accuracy Indicator in the mainframe User s Rcfcrence manual While Enhanced Accuracy is in efFect to verify the DC mcasurcment Accuracy of the plug in and mainframe system apply and monito...

Page 30: ...may result in losing some of the Non Volatile RAM dnta This could cause diagnostic errors at the ntw power up and affect normal in wrw wnt operation in unpredictable ways CHECK for the message Callbr...

Page 31: ...0 V div BW Limit or HF Limit _ 20 MHz Impedanc e SOn Procedure Perform this procedure for each channel CIfECK that the displayed trace position is at the center graticule line within the value Shift l...

Page 32: ...v 2 mV div 1 tnV div TABLE 2 3 UM2 DC Balance Table 0 063 0 065 0 073 0 085 0 065 0 073 0 085 0 065 0 073 0 085 0 110 0 185 0 310 40 I Shift f mV 630 330 146 85 I 8 3 3 3 1 4B 83 55 37 31 U301 ll302Sh...

Page 33: ...ication Rcfcr to Table 2 4 Oscilloscope I First Initialize the oscilloscope s settings then perform the fallowing settings in the order listed Center Plug in CH 1 Displayonioff on Oscillorcope Mainfra...

Page 34: ...VM and record this value V2 on a copy of Table 2 4 1 Subtract V2 Vl AV and write the absolute value of the difference on the copy of Table 2 4 e C1YECK that AV is within the tolerance given in the spe...

Page 35: ...setup Refer to Table 2 S Digital Voltmeter 50 R Termination not connected yet WV 510 R Resistor not connected yet First Initialize the oscilloscope s settings then perform the foXlowingsettings in th...

Page 36: ...wer Supply and set the voltage so that the displayed trace returns to the position noted in step a CHECK that the difference between the Vet Offset reading and the DVM reading is less than that shown...

Page 37: ...r fingers beginning at the rear of the appro priate side To install a shield position it over the frame rail grooves then press down with your fingers until the shield snaps into place Pressure must b...

Page 38: ...cnts refer to the topic Amplifier Hybrids under Corrective Maintenance later in this section for more information on Hypcon connectors Circuit boards und components mtrst be dry before applying power...

Page 39: ...ages of I kV to 30 kV are ammo in unprotecled environments O SCTYL the following precautions to avoid damage I Minimize handling of static sensitive components 2 Transport and store static sensitive c...

Page 40: ...Relative Susceptibility LW MOS or CMOS microcircuits and discrete or I 1 linear microcircuits with MOS inputs most sensitive ECL Schottky signal diodes Schottky TTL High frequency bipolar transixors...

Page 41: ...er FRUs The exploded view drawing associaled wilh the Replaccahlc Partr list may be helpful in the disassembly procedures that follow This drawing is located in Section 5 at the end of this manual f t...

Page 42: ...EKEEPER EPROM IC IC ATTENUATOR 1 A2 FRONT PANEL BO Ro liN BOARD J UID JUMPER Al U700 PROCESSOR IC ATTENbATOR 2 B NUT BLOCKS 3 NUT BLOCKS 2 Figure 3 1 Field Replaceable Units FRU locator and Al Main bo...

Page 43: ...TC from falling out Obsawe the index of the IC before removing it 3 Rcmovc the IC with tweezers B Avoid touching the IC or the rocket ao octs with your Jbzgers Finger oils can lessen reliabiliry Inst...

Page 44: ...gram Amplifier Hybrids Figure 3 3 shows an exploded view of the Hypcon Hybrid printed circuit connector and gives disassembly and replacement instructions When replacing the hybrid do not touch the el...

Page 45: ...wcn dty at 50 C Do not scrub with a wttnn tipped swab or similar device Cotton fibcrs may adhere to Ihe contacts If the ccmtact holder is cxwssivcly wntaminatcd replace il with a new one Tighten the...

Page 46: ...3 PLASTIC FRAME REGISTRATION PINS 0 ELASTOMER CONTACT HOLDER MICROCIRCUIT STIFFENER HEAT SINK CROSS SECTION VIEW OF HYPCON CONNECTOR ELASTOMER CONTACT HOLDER CONDUCTOR Figure 3 3 Hypcon assembly remov...

Page 47: ...er the conacts which are almost bwisihle to the naked eye wi prevent good eiechicol contwt Most apparent failures of the hybrid are nctrraliydue to contaminution of the Hypcon Ilo not tortch the gold...

Page 48: ...he pliers around the outside of the IC Squeeze the handles to g p the IC and slowly pull it from the socket Avoid tonching the KC pim or socket contacts with yoarfinges Fin ger oils coti lessen contac...

Page 49: ...the IC Squeeze the handles to grasp the IC and slowly pull it from the sockcl Install the Processor IC as follows 3 I Grasp the rrplacemcnt IC with the Insertion Extraction Pliers Check that all its p...

Page 50: ...Figure 3 4 IC Insertion Extraction Pliers 3 14 Maintenance llA32 Sctvice Reference...

Page 51: ...he front panel so that the notch in lhe hollom fits over the rcIciw bar then carefully inserl lhe four front panel tabs into the slots i lhc fro 1 subpanel You may need to pull the top and botlom fram...

Page 52: ...s down Put a metal on elastomer MOE strip holder on the Main board in the ap propriak location refer to Fig 3 5 Put the two MOE suips in the holder The exposed elastomer side of each strip should face...

Page 53: ...nel board s at the AL Main board 2 USC a Torx T 8 screwdriver to remove the screws attaching Ihc altcnwtors lo the A l Main board 3 Unplug the cables that connect the attenuators to the Al Main board...

Page 54: ...ard from between the frames 12 Remove the rear panel from the Al Main board How to Install the Al Main Board 1 Align the notches in the rear panel with the notches in the top and bottom frames Reattac...

Page 55: ...which attach the attenuators to the Al Main board Use a Ton T 8 screwdriver to install the four ZGWVS that fasten the front panel lo lhe top and bottom frames Use a Torx T 8 scrwdriver to tighten the...

Page 56: ...e Manual for instructions on setting up the RS 232 C parameters Inside thL plug in move the jumper 5611 shown in Fig 3 1 on the Al Main board The jumper should be vertical in its normal position Remov...

Page 57: ...a gap between pins 1 and 3 in the holder A small plastic plug COVE the pin 2 position on the end of the holder There is a COT responding gap bolwccn pins 1 and 3 on the circuit board as shown in Figur...

Page 58: ...e Kernel Tests and Self TestsiExtcnded Diagnostics produce and format error index codes differently so they are covered separately Some of these tests that may indicate faulty FRUs are not run automal...

Page 59: ...mal operation hul it is unlikely that Ihe instrumenl can function properly with a had ROM Checksum 2 The non volatile RAM NV RAM Test verifies that the NV RA M is functions ing properly Since lhe NV R...

Page 60: ...Tesl Diagnostics Any failures cause the instrument to display the Ex tended Diagnostics menu Record the displayed error codes for the failed circuit block s You may have to step through several pages...

Page 61: ...Di agnostics or Extended Test menus and operation New Configuration Calibration When a plug in unit is first installed in a mainframe or when one is moved to tt dif ferent compartment in the mainframe...

Page 62: ...ation used in Ihe FRU tables below Abbreviation 1Name Designator I MPU EPROM HK Attl At12 Amp1 Amp2 Processor Firmware Housekeeper Attenuator channel 1 Attenuator channel 2 Amplifier channel 1 Amplifi...

Page 63: ...ists the error messagcs resulting from Enhanced Accuracy Enhanced Accuracy is available after the system has a 20 minute warmup period Test I 1411 At11 142 1 Attl 1431 Amp1 1441 Amp1 1451 Attl Amp1 14...

Page 64: ...he plug in contains a microprocessor MPU that communicates with lhe main frame The MPU also constantly monitors the input Overload Sense and the Probe Data communication lines The operation of the MPU...

Page 65: ...al Trigger Signal Display Signal CH2 Amplifier lb CH 2 Aux Signal Variable Gain Offset Overload Sense Probe Data 3andwidth Control AD D A Conversion L r Channel Switch Sequence Main rame Al Main Board...

Page 66: ...ve front panel LED Control Flow Under the control of the mainframe s channel swilch sequencing signals rhc Housc keeper sequentially turns a channel on or off The MPU and Housckucpcr contrid the swing...

Page 67: ...REPLACEABLE PARTS epl aceabl e Par t s l l A32 ABBREVIATIONS Sect i on 5...

Page 68: ...NG INC GREER CENTR4L 01 CONNOR SPRI NG AND M FG CO NORThW EST FOL SLIOE INC SHI N ETSU POLYM ER PM EAI CA INC 1818 CHRISTINA ST 17301 RIf f i El AND 15201 BURBANK BLYD SUITE C 4903s w GRIFFITHOR P 0 B...

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Page 70: ...070 6782 K OPTIM JAL ACCESSORIES W W AL TECH SERVICE REF l l A32 6W o9 070 6782 00...

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