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General Maintenance

Figure 4-3: Analog audio board power supply test point locations

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WFM8200 and WFM8300 Waveform Monitors Service Manual

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Summary of Contents for WFM8200

Page 1: ...xx WFM8200 and WFM8300 Waveform Monitors ZZZ Service Manual P077039300 077 0393 00...

Page 2: ......

Page 3: ...l xx 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 pr...

Page 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...

Page 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...

Page 6: ......

Page 7: ...1 2 Product Upgrade 1 2 Operating Information 1 2 Theory of Operation Theory of Operation 2 1 Main Board 2 3 Front Panel 2 4 Composite Input Option CPS 2 4 Audio Options AD and DPE 2 4 Option EYE PHY...

Page 8: ...es 4 23 Preparation 4 23 Module Removal 4 25 Repackaging Instructions 4 32 Packaging 4 32 Shipping to the Service Center 4 32 Replaceable Parts Replaceable Parts 5 1 Parts Ordering Information 5 1 Usi...

Page 9: ...power supply test point locations 4 22 Figure 4 4 Module securing screws 4 26 Figure 4 5 Front panel and fan cable connections 4 29 Figure 4 6 Front panel disassembly 4 30 Figure 4 7 Front panel board...

Page 10: ...oard secondary supplies 4 13 Table 4 7 Analog audio secondary supplies board not present for option DS instrument 4 13 Table 4 8 Tools required for module removal 4 24 Table 4 9 Module removal 4 25 Ta...

Page 11: ...Observe all terminal ratings 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...

Page 12: ...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 read the mark...

Page 13: ...f 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 Servicing...

Page 14: ...Service Safety Summary viii WFM8200 and WFM8300 Waveform Monitors Service Manual...

Page 15: ...le the modules Replaceable Parts illustrates the replaceable modules and mechanical parts and provides replacement part numbers Manual Conventions The following terms and conventions are used througho...

Page 16: ...00 Waveform Monitor Specifications and Performance Verification Procedure for checking performance and list of specifications Product Documentation CD www tektronix com manuals WFM and WVR Series Mana...

Page 17: ...Introduction...

Page 18: ......

Page 19: ...s product are found in the WFM8200 and WFM8300 Waveform Monitors Specifications and Performance Verification Technical Reference located on the Product Documentation CD that ships with the product and...

Page 20: ...00 and WFM8300 Waveform Monitors User Manual includes instructions for updating product software Operating Information For operating instructions refer to the WFM8200 and WFM8300 Waveform Monitors Use...

Page 21: ...Theory of Operation...

Page 22: ......

Page 23: ...level Block diagram See Figure 2 1 When necessary other block diagrams may also be referenced The lower portion of the block diagram covers functions on the main board The upper sections cover those...

Page 24: ...heory of Operation Power Distribution is not shown in the block diagram but is covered at the end of this section Figure 2 1 Main block diagram 2 2 WFM8200 and WFM8300 Waveform Monitors Service Manual...

Page 25: ...to the waveform processing FPGA This block deformats up samples interpolates demodulates and otherwise processes the data to generate the signals needed to create the displays Rasterizing Engine The...

Page 26: ...ront panel processor flash code must be updated Composite Input Option CPS The Composite inputs are also passive loop throughs If unterminated the signal appears twice as large as it should The inputs...

Page 27: ...cillator and sent to the audio board At the audio board the streams are multiplexed into the AES decoders and then follow the same path as the AES data The user can choose to have the de embedded audi...

Page 28: ...en digitized The selected input is also applied to a clock recovery circuit The recovered clock is divided by 10 for SD by 20 for HD filtered to form a sine wave and then digitized Both the SDI input...

Page 29: ...Theory of Operation Figure 2 2 Option EYE PHY block diagram WFM8200 and WFM8300 Waveform Monitors Service Manual 2 7...

Page 30: ...ain board The fans are tested at power on If a fan fails a message is shown on screen and also entered into the diagnostic log Power Supply and Distribution The power supply has a universal AC input e...

Page 31: ...Adjustment Procedures...

Page 32: ......

Page 33: ...estore Off Option CPS only Composite Analog Vertical Measurement Accuracy Option CPS only Composite Analog Frequency Response Option CPS only Analog Audio Level Meter Accuracy Over Frequency Options A...

Page 34: ...R Null calibration as described below 1 Press the CONFIG button 2 Select Utilities Calibration and press SEL to enter the Calibration menu 3 Use the arrow buttons to navigate to the appropriate Eye CD...

Page 35: ...Control Setting Vert 200 mV Div Horiz 20 s Div Trigger Edge 5 Press the Config button 6 Select Utilities Calibration Press SEL to enter the calibration menu 7 Navigate to the Pixmon YPbPr Gain calibr...

Page 36: ...Flat Field or 100 Color Bars to the SDI A input 2 Connect an XGA to 5x BNC adapter cable to the PixMon output 3 Connect the Pb Blue video signal to the oscilloscope input Use an oscilloscope with a 7...

Page 37: ...elect Composite Waveform Gain and then press SEL 5 Follow the on screen instructions to adjust the gain 6 Follow the instructions at the bottom of the screen to Save and Exit Calibration mode Composit...

Page 38: ...alog A input that requires adjustment 3 Press the CONFIG button 4 Navigate to Utilities Calibration and then press SEL 5 Push the up or down arrow key until the desired Analog Audio input channel is h...

Page 39: ...Maintenance...

Page 40: ......

Page 41: ...cing this product read the Safety Summary and Introduction at the front of the manual and the ESD information below CAUTION Static discharge can damage any semiconductor component in the instrument Wh...

Page 42: ...trument and disconnect it from line voltage before performing any procedure that follows Interior Cleaning Use a dry low velocity stream of air to clean the interior of the chassis Use a soft bristle...

Page 43: ...Repair or replace damaged or missing items frayed cables and defective modules Cracks Replace the LCD assembly LCD Dirty Clean with glass cleaner Inspection Interior To access the inside of the instru...

Page 44: ...eionized air approximately 9 psi 2 Remove any remaining dust with a lint free cloth dampened in isopropyl alcohol 75 solution and rinse with warm deionized water A cotton tipped applicator is useful f...

Page 45: ...w the steps in the Unknown Problem section in the Symptoms and Causes table The WFM8200 and WFM8300 Waveform Monitors are highly configurable and behavior is sometimes complex Before troubleshooting i...

Page 46: ...dded audio needed for audio options 525 270 SD signals required 100 color bars 10 bit shallow ramp SDI Matrix Pathological Signal 100 sweep Tektronix TG700 with DVG7 module Embedded audio needed for a...

Page 47: ...power supply checks Perform secondary power supply checks Examine Power up Diagnostics results in the Diagnostic Log Run Advanced Diagnostics Replace Main circuit board Fails any of these Power On Di...

Page 48: ...nformation Replace the EYE PHY board Failures while running the advanced diagnostics DSP1 QDR1 Memory 1 DSP1 QDR2 Memory 2 DSP2 QDR1 Memory 1 DSP2 QDR2 Memory 2 DSY DDR Buffer 1 Memory DSY DDR Buffer...

Page 49: ...ilures If the problem persists replace the audio board Unknown Problems An instrument may come into service with vague or intermittent symptoms In a case like this the following set of tests may help...

Page 50: ...DS12 lights Fan 2 fails LED DS11 lights A fan failure is sensed through tachometer feedback a fault will be asserted if the fan is not connected is stalled or if the tachometer feedback line is not w...

Page 51: ...in the 5 V system near the main board power connector J22 See Figure 4 1 on page 4 20 All should have 5 V on both sides If not replace the fuse If the main power supply output voltage is zero measure...

Page 52: ...the main supply Next check if any of the three Red LEDs DS5 DS6 or DS7 are on These indicate failures on the general 5 V general 3 3 V and processor 1 5 V supplies respectively If these are lit the mo...

Page 53: ...2 5 V 4 5 to 5 5 TP1 The Eye board also has multiple secondary supplies and test points along the top edge where they can be probed The Power up Diagnostics measure these so they are not included in t...

Page 54: ...able from the backlight inverter on the rear of the display assembly to the main board J18 Also check connector J18 itself for any solder issues 7 If the backlight is still bad replace the front panel...

Page 55: ...power supply test points and LEDs See Figure 4 1 on page 4 20 If this LED is off skip to step b otherwise probe pin D21 of connector J641 of the Audio board the connector to the Main board during the...

Page 56: ...h E22 and pins D16 17 18 and C17 on the audio board connector J641 and verify that the signals on all pins are toggling If any signals are not toggling replace the main board d Probe pins C15 C16 and...

Page 57: ...ng replace the main board d Probe pins C15 C16 and C19 on connector J641 during the boot sequence and verify that the signals on the pins toggle If they do not toggle suspect the main board e Probe pi...

Page 58: ...J641 is not as described in step a the audio board most likely has a failure otherwise replace the main board 3 Check the Lissajous bus frame and data signals by performing these substeps a Put the o...

Page 59: ...EYE PHY board Jitter Readout and Jitter Meter Problems These measurements are derived from sampled recovered clock sine wave data Operation is unlikely to fail if the basic Eye pattern display works c...

Page 60: ...General Maintenance Figure 4 1 Main board power supply test points and LEDs 4 20 WFM8200 and WFM8300 Waveform Monitors Service Manual...

Page 61: ...General Maintenance Figure 4 2 Audio Main board power supply test point locations WFM8200 and WFM8300 Waveform Monitors Service Manual 4 21...

Page 62: ...General Maintenance Figure 4 3 Analog audio board power supply test point locations 4 22 WFM8200 and WFM8300 Waveform Monitors Service Manual...

Page 63: ...ou need to properly do the procedures that follow List of tools required to remove and disassemble all modules Procedures for removal and reinstallation of the modules WARNING Before doing any procedu...

Page 64: ...inch flat bladed screwdriver Screwdriver for unlocking cable connectors Standard tool 5 Angle Tip Tweezers Used to remove front panel knobs Standard tool 6 3 16 inch nut driver Used to remove jack scr...

Page 65: ...Main board Power supply X Fan assembly X Front panel LCD assembly X X Bezel front panel board X Top Cover The top cover is a slip lock design 1 Remove the six T 10 screws at the top cover front corner...

Page 66: ...Lift the Composite module out of the instrument rocking it gently until the connector separates from J20 on the Main board It may help to loosen the adjacent rear panel screws SDI or EYE PHY board The...

Page 67: ...to loosen the adjacent rear panel screws 3 Use a 3 16 inch nutdriver to remove the jackscrews securing the ANALOG AUDIO connector on the rear panel you just removed 4 Remove the special nuts securing...

Page 68: ...to compress the lock tab on the connector and disconnect the fan power cables from J11 Fan 1 and J12 Fan 2 on the Main board See Figure 4 5 on page 4 29 3 Lift the baffle out of the instrument Front P...

Page 69: ...Remove the two T 10 screws that secure the LCD Assembly to the display bracket 5 Use a Phillips screwdriver to remove the two Pozidriv screws securing the bottom of the bezel to the display bracket 6...

Page 70: ...ee Figure 4 7 on page 4 30 1 Remove the three knobs from the front panel 2 Remove the one T 10 screw that secures the front panel to the bezel 3 Use a 3 16 inch nutdriver to remove the two jackscrews...

Page 71: ...mote connector two from the Pix Mon connector and two from the Ext Display connector 3 Remove the special nuts securing the three BNC connectors to the rear panel NOTE Special nuts are used on the BNC...

Page 72: ...g 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 informatio...

Page 73: ...Replaceable Parts...

Page 74: ......

Page 75: ...r a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Module Servicing Modules can...

Page 76: ...nix part number Use this part number when ordering replacement parts from Tektronix 3 and 4 Serial number Column three indicates the serial number at which the part was first effective Column four ind...

Page 77: ...L 4 00 L CONN EACH END LINE FILTER TO PWR SUPPLY SAFETY CONTROLLED 12 441 2575 00 1 CHASSIS MODULE 13 134 0246 01 PLUG HOLE COVER BUTTON PLUG 0 578 HEAD DIA X 0 406 THK ACCOM 0 5 DIA HOLE 0 015 0 125...

Page 78: ...31 131 7564 00 4 CONN RF PLUG DUAL STACKED BNC PCB PNL MNT FEMALE RTANG 75 OHM ZINC DIE CAST HOUSING 32 131 M057 00 4 CONN RF PCB FEMALE BNC 75OHM EDGE LAUNCH TYPE 33 220 0271 00 8 SPANNER NUT AND LOC...

Page 79: ...Replaceable Parts Figure 5 1 Circuit boards and connectors WFM8200 and WFM8300 Waveform Monitors Service Manual 5 5...

Page 80: ...ASSY 389410200 FP ROHS COMPLIANT 8 850 0125 00 1 FRAME FRONT BEZEL PC ABS TV GRAY SAFETY CONTROLLED 9 366 0859 01 3 ASSEMBLY KNOB 470 DIAMETER SOFT TOUCH 10 174 5652 00 1 CABLE ASSEMBLY POWER SUPPLY 1...

Page 81: ...Replaceable Parts Figure 5 2 Chassis components WFM8200 and WFM8300 Waveform Monitors Service Manual 5 7...

Page 82: ...FAST BLOW 0 1 X 0 1 X 0 24 UL REG CSA CERT SAFETY CONTROLLED 4 159 5003 00 1 FUSE THRM CHIP SELF RESETTING FUSE 1 1A HOLD 2 2A TRIP AT 20 DEG C 30V MAX SAFETY CONTROLLED 5 159 5014 00 1 FUSE 2 0A 125V...

Page 83: ...Replaceable Parts Figure 5 3 Main board replaceable components WFM8200 and WFM8300 Waveform Monitors Service Manual 5 9...

Page 84: ...NALOG AUDIO BREAKOUT CABLE Note Optional Accessory 1 012 1688 00 1 CABLE ASSEMBLY ANALOG AUDIO BREAKOUT 2 200 4804 00 1 COVER SHIELD ELEC CONN 37 POS DSUB ZINC 3 131 0422 00 1 CONN DSUB SLDR CUP PNL M...

Page 85: ...N INSTRUCTIONS 077 0261 xx MANUAL TECH MANAGEMENT INFORMATION DATABASE MIB PROGRAMMER 063 4217 xx Subpart of 020 3005 xx 1 DOCUMENTATION PRODUCT CD CABLE ASSY POWER Option Country P N A0 N AMERICA 061...

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