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Tektronix WVR4000, Руководство по обслуживанию

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Theory of Operation

Fan Control

There is a temperature sensor on the Backplane board. The control circuits use the
temperature data to adjust the target speed for the fan. The fan circuit holds the
fan speed at the target by measuring the fan tachometer output, allowing reliable
operation at low speed. If the fan is not turning, the circuit senses the stall and
turns on a red LED (DS170 on the Backplane board).

Power Supply and Distribution

The Backplane board provides adverse input protection, on/off switching, and
transient/EMC conditioning for the DC power input. The Backplane board also
hosts all of the DC/DC converters for the various voltages used within the unit. In
some cases, additional local linear regulators are used on other boards.

A 4 A Polyswitch (self resetting thermal fuse) provides input overcurrent fault
protection. Failure of this fuse usually indicates a serious fault within the
instrument.

The secondary supplies, their tolerances and locations are speci

fi

ed in the

Maintenance

section.

8

WVR4000 and WVR5000 Service Manual

Содержание WVR4000

Страница 1: ...xx WVR4000 and WVR5000 Waveform Rasterizers ZZZ Service Manual P077244901 077 2449 01...

Страница 2: ......

Страница 3: ...Revision B 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 summa...

Страница 4: ...and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tek...

Страница 5: ...taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and...

Страница 6: ......

Страница 7: ...tion 3 SDI I O Board 5 Reference I O Board 5 DVI I O Board 5 Main Board 6 Front Panel 7 Audio 7 Fan Control 8 Power Supply and Distribution 8 Maintenance 9 Preventing ESD 9 Inspection and Cleaning 10...

Страница 8: ...ard removal 27 Figure 6 Main board 28 Figure 7 Backplane board removal 29 Figure 8 Backplane board 30 Figure 9 DVI board removal 32 Figure 10 SDI board removal 33 Figure 11 REF board removal 34 Figure...

Страница 9: ...3 Required test equipment 13 Table 4 Symptoms and causes 14 Table 5 Backplane board secondary supplies 17 Table 6 Lead free solder and paste 22 Table 7 Tools required for module removal 23 Table 8 Mo...

Страница 10: ...s To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Do not apply a poten...

Страница 11: ...that could result in damage to this product or other property Symbols and Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you rea...

Страница 12: ...capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When...

Страница 13: ...find product installation information Theory of Operation provides descriptions of the WVR4000 and WVR5000 Series Waveform Rasterizers modules Maintenance tells you how to troubleshoot the product to...

Страница 14: ...mes installed on the instrument Table i Related documentation Item Purpose Location WVR4000 and WVR5000 Waveform Rasterizers User Manual Installation and high level operational overview WVR4000 and WV...

Страница 15: ...ps with the product See page viii Related Manuals Performance Verification The Performance Verification procedures for this product are found on the WVR4000 and WVR5000 Product Documentation CD that s...

Страница 16: ...mentation CD that shipped with this product For more detailed reference information refer to the Waveform Rasterizer Online Help Press the Help button on the instrument and then use the General knob u...

Страница 17: ...rs They are configured to accept serial SD digital or HD digital inputs and digital audio inputs All models use an external XGA monitor for the display This theory of operation is mainly based on the...

Страница 18: ...Theory of Operation Figure 1 Block diagram 4 WVR4000 and WVR5000 Service Manual...

Страница 19: ...ator the single ended digital output of which is sent over the ribbon cable to the Main board Ground Closure Interface Signals The ground closure interface GCI signals are heavily filtered and protect...

Страница 20: ...intensity map is built up in one memory chip and read out of the other The functions swap on the next field Recursion and Picture Processing Engine The output of the rasterizer feeds the picture and r...

Страница 21: ...ng Audio Processing The audio processing engine uses the DSY FPGA whose main function is to calculate the peak values for the selected meter ballistics response characteristics The audio data has two...

Страница 22: ...and Distribution The Backplane board provides adverse input protection on off switching and transient EMC conditioning for the DC power input The Backplane board also hosts all of the DC DC converter...

Страница 23: ...nent in the instrument When performing any service that requires internal access to the instrument adhere to the following precautions to avoid damaging internal modules and their components due to el...

Страница 24: ...lean the interior of the chassis Use a soft bristle non static producing brush for cleaning around components If you must use a liquid for minor interior cleaning use a 75 isopropyl alcohol solution a...

Страница 25: ...the internal portions of the instrument for damage and wear Defects found should be repaired immediately If any circuit board is repaired or replaced see if it is necessary to adjust the instrument Se...

Страница 26: ...do not remove all the dust or dirt the instrument may be spray washed using a solution of 75 isopropyl alcohol by doing steps 4 through 6 4 Gain access to the parts to be cleaned by removing easily ac...

Страница 27: ...st equipment Test equipment Requirements Example 1080i 59 94 HD signals required for WVR5000 100 color bars 10 bit shallow ramp SDI Matrix Split Field Pathological Signal 100 sweep Tektronix TG2000 wi...

Страница 28: ...in one of the following areas SDI REF DVI LTC If the problem is only the SDI input first replace the SDI I O board If that does not fix the problem replace the main board If the problem is only the re...

Страница 29: ...rd is connected 2 Remove the cover and check that all visible internal cables are correctly connected and seated 3 Check for any visible discolored or burned components Fan Failures There is a tempera...

Страница 30: ...If the voltage is now 5 V replace the fan If available probe tips preclude direct measurement of J11 pin 3 start by replacing the fan If that does not fix the problem replace the Backplane board If y...

Страница 31: ...o 18 V range with up to 0 2 V drop TP20 Fan 5 to 13 5 TP11 1 5 4 75 to 5 25 TP3 1 3 3 3 2 to 3 4 TP4 2 2 5 2 4 to 2 6 TP5 2 1 5 1 4 to 1 6 TP6 2 5 4 75 to 5 25 TP7 2 1 Near the fan circuits 2 Near the...

Страница 32: ...mally 2 If the buttons are not lit check the 10 pin cable from the keypad to the main board J1 If the cable is connected and good then replace the front panel assembly 3 If the buttons do not go out a...

Страница 33: ...d is seated and in good condition If this does not resolve the problem follow step 1 for embedded audio Examine Power On Self Tests POST Results in the Diagnostic Log To examine the POST results press...

Страница 34: ...carton with an industrial stapler or strapping tape Shipping to the Service Center Contact the Service Center to get an RMA Return Material Authorization number and any return or shipping information...

Страница 35: ...moval of the modules WARNING Before doing any procedure in this subsection disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death NOTE Read Equipme...

Страница 36: ...t provides a higher temperature 700 F for proper melting of the lead free solder If you are using syringe paste a hot air gun capable of providing temperatures slightly higher than 700 F Preparation f...

Страница 37: ...to remove front panel knobs 8 3 16 inch nut driver Used to remove jack screws and front panel standoffs 9 MA 800G Soldering Aid spudger Used to remove the front panel trim 10 Bomar DB36400 Special BN...

Страница 38: ...ve Front panel assembly Main board Front panel board SDI board Ref board Backplane board DVI board Main chassis Cover X X X X X X X X Fan assembly Main board Front panel board X Backplane board DVI bo...

Страница 39: ...Removal and Replacement Procedures Figure 3 WVR overview WVR4000 and WVR5000 Service Manual 25...

Страница 40: ...o remove the cover perform the following procedure See Figure 4 1 Remove the 15 Phillips head screws from the sides top and rear of the cover 2 Lift the cover straight up and remove Figure 4 Cover rem...

Страница 41: ...ure 5 See Figure 6 1 Remove the cover 2 Detach the blue cable that runs from the DVI board to the backplane board and then detach the J3 J8 J9 J6 J7 and J17 connectors from the main board 3 Remove the...

Страница 42: ...Removal and Replacement Procedures Figure 6 Main board 28 WVR4000 and WVR5000 Service Manual...

Страница 43: ...re 7 See Figure 8 1 Remove the cover 2 Detach the blue cable that runs from the DVI board to the backplane board from the backplane board 3 Detach the cables from the J8 J3 J19 J11 J5 and J1 connector...

Страница 44: ...Removal and Replacement Procedures Figure 8 Backplane board 30 WVR4000 and WVR5000 Service Manual...

Страница 45: ...the rear panel 3 Remove the cables from the following connectors found on the bottom of the DVI board J17 J19 and the Ethernet jack 4 Remove the two Torx 15 screws from the DVI board 5 Grasp the DVI b...

Страница 46: ...Removal and Replacement Procedures Figure 9 DVI board removal 32 WVR4000 and WVR5000 Service Manual...

Страница 47: ...procedure See Figure 10 1 Remove the cover 2 Remove the cable from the J6 connector 3 Remove the five washers and five nuts from the SDI BNCs in the rear panel 4 Remove the two T 15 screws from the S...

Страница 48: ...nd the DVI board 2 Remove the cable from the J10 connector 3 Remove the two screws that attach the GCI connector to the rear panel 4 Remove the two washers and two nuts from the REF BNCs in the rear p...

Страница 49: ...move the three Phillips screws from the bottom of the rear panel 3 Remove the two T 8 screws and two nuts from the power connector 4 Remove the seven nuts and seven washers from the BNC connectors 5 R...

Страница 50: ...Removal and Replacement Procedures Figure 12 Rear panel removal 36 WVR4000 and WVR5000 Service Manual...

Страница 51: ...om the back center of the main chassis 3 Detach the fan cable from J11 on the backplane board 4 Lift the fan assembly away from the instrument 5 If you want to take the fan assembly apart remove the f...

Страница 52: ...Removal and Replacement Procedures Figure 13 Fan assembly removal 38 WVR4000 and WVR5000 Service Manual...

Страница 53: ...ove the three knobs from the Front Panel 3 Remove the two Phillips screws that connect the main chassis to the front bezel They are located on the bottom corners of the Front Panel bezel 4 Remove the...

Страница 54: ...wing procedure See Figure 15 1 Remove the Front Panel assembly 2 Remove the four Torx 10 screws that hold the frame to the Front Panel lexan 3 Remove the four Torx 15 screws from the Front Panel board...

Страница 55: ...l number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you...

Страница 56: ...identification Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 Table 10 Replaceable parts list Index number Tektronix part number Serial no effective Serial no discon...

Страница 57: ...7 211 0380 00 2 SCREW MACHINE 4 40 X 0 375 FLH 410 SS PASSIVATED T8 28 214 3903 00 4 VENDOR LYNTRON SCREW JACK 4 40 X 0 312 LONG 0 188 H HEX HEAD STAND OFF 4 40 INT THD X 0 312 THD EXT 4 40 STEEL SN P...

Страница 58: ...WVR5000 see item number 41 53 159 0412 00 1 FUSE THRM CHIP SELF RESETTING FUSE 0 5A HOLD 1 0A TRIP 60V MAX SMD050 T SAFETY CONTROLLED 54 211 0373 00 4 SCREW MACHINE 4 40 X 0 250 PNH STEEL ZINC FINISH...

Страница 59: ...66 13 A5 Switzerland 161 0154 00 A6 Japan 161 0298 00 See Description 1 A10 China 161 0304 00 A11 India 161 0400 00 Optional Accessories 071 2185 xx MANUAL TECH ND NC TEKTRONIX SUPPLEMENTAL INFORMATIO...

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