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Tektronix WFM5250, Service Manual

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Tektronix WFM5250 Service Manual Download Page 29

General Maintenance

Table 2: Internal inspection checklist

Item

Inspect for

Repair action

Circuit
boards

Loose, broken, or corroded solder
connections. Burned circuit boards.
Burned, broken, or cracked circuit-run
plating.

Remove and replace damaged
circuit board.

Resistors

Burned, cracked, broken, blistered
condition.

Remove and replace damaged
circuit board.

Solder
connections

Cold solder or rosin joints.

Resolder joint and clean with
isopropyl alcohol.

Capacitors

Damaged or leaking cases. Corroded
solder on leads or terminals.

Remove and replace damaged
circuit board.

Wiring and
cables

Loose plugs or connectors. Burned,
broken, or frayed wiring.

Firmly seat connectors. Repair
or replace modules with defective
wires or cables.

Chassis

Dents, deformations, and damaged
hardware.

Straighten, repair, or replace
defective hardware.

WFM5250 Waveform Monitor Service Manual

13

Summary of Contents for WFM5250

Page 1: ...xx WFM5250 Waveform Monitor ZZZ Service Manual P077080000 077 0800 00...

Page 2: ......

Page 3: ...rning 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...

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 Product Upgrade 2 Operating Information 2 Theory of Operation 3 Video I O Board 5 REF I O Board 5 FPGA Board 5 CPU Board 6 Front Panel 6 Audio Option AUD 6 Fan Control 7 Power Supply and Distributi...

Page 8: ...Table of Contents Replaceable Parts 37 Parts Ordering Information 37 Using the Replaceable Parts Lists 38 ii WFM5250 Waveform Monitor Service Manual...

Page 9: ...or ground clip 28 Figure 5 Screws that attach fan bracket to main chassis 30 Figure 6 Fan screw placement 31 Figure 7 CPU board screw and spacer posts 32 Figure 8 Correct spring clip position 33 Figur...

Page 10: ...tion checklist 12 Table 2 Internal inspection checklist 13 Table 3 Required test equipment 15 Table 4 Symptoms and causes 16 Table 5 Video I O board basic supplies 19 Table 6 Tools required for module...

Page 11: ...r adjustment Before use always check the product with a known source to be sure it is operating correctly This product is not intended for detection of hazardous voltages Use personal protective equip...

Page 12: ...try Do not touch exposed connections and components when power is present Do not operate with suspected failures If you suspect that there is damage to this product have it inspected by qualified serv...

Page 13: ...afety summary and the General safety summary before performing any service procedures To avoid electric shock Do not touch exposed connections Do not service alone Do not perform internal service or a...

Page 14: ...ccessible as you read the marking CAUTION indicates a hazard to property including the product When this symbol is marked on the product be sure to consult the manual to find out the nature of the pot...

Page 15: ...ce 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: ...checking performance and list of specifications Product Documentation CD www tektronix com downloads System Integration Technical Reference Provides information for system integrators who are designi...

Page 17: ...e i Options and Accessories The lists of options and accessories for this product are found in the user manual located on the Product Documentation CD See Table i Configurations The base instrument ha...

Page 18: ...nel and then use the General knob up down arrow keys and SEL button to navigate through the topics Power On Procedure 1 Connect the supplied power cord to the external AC adapter and connect its XLR o...

Page 19: ...o the External Reference and Front Panel boards are shown Power Distribution is not shown in the block diagram but is covered at the end of this section The primary functions on the CPU board are Cont...

Page 20: ...Theory of Operation Figure 1 Instrument block diagram 4 WFM5250 Waveform Monitor Service Manual...

Page 21: ...upplied to the DSP FPGA where the timing information is derived The reference signal is also digitized for display as a waveform LTC LTC inputs come from the remote connector The LTC signal is applied...

Page 22: ...nnection to run at 10 or 100 MBps Front Panel The front panel contains a small processor that communicates with the control processor through SPI signaling Reprogramming can be done through the SPI if...

Page 23: ...e 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 External power may be supplied by either the provided power modu...

Page 24: ...Theory of Operation 8 WFM5250 Waveform Monitor Service Manual...

Page 25: ...re servicing 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 instr...

Page 26: ...e 6 Do not slide the circuit boards over any surface 7 Avoid handling circuit boards in areas that have a floor or work surface covering capable of generating a static charge 10 WFM5250 Waveform Monit...

Page 27: ...aning Use a dry low velocity stream of air to clean 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...

Page 28: ...for Repair action Cabinet front panel and cover Cracks scratches deformations damaged hardware Repair or replace defective module Front panel knobs Missing damaged or loose knobs Repair or replace mi...

Page 29: ...damaged circuit board Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Corroded solder on leads or terminals Remove a...

Page 30: ...you find because the Recommended Actions are effective only if the functions covered earlier in the table are working correctly If you do not find your problem in the table or if no specific problem...

Page 31: ...for audio options SDI serial digital video test generator with embedded audio Instruments with option 3G require a 3 Gb s SDI source 525 270 SD signals required 100 color bars 10 bit shallow ramp SDI...

Page 32: ...e front panel assembly Power Up Diagnostic failures Faults referring to main or CPU board Replace CPU board Faults referring to FPGA functions Replace FPGA board Fan faults Perform Fan Checks Advanced...

Page 33: ...e messages for an error that may not be currently happening 2 Check the power supplies by performing the Diagnostic Monitor Voltage Checks A marginal supply can lead to intermittent operation if it is...

Page 34: ...ect to chassis ground The external power supply voltage 10 to 19 VDC should be present at this pin If no LEDs are lit on the front panel or CPU board press the front panel power button to check that t...

Page 35: ...deo I O board and is present at the 12V test point if instrument power is on The switched 12V powers 5V and 3 3V switching power supplies also located on the Video I O board These three voltages are t...

Page 36: ...Troubleshooting Figure 2 Video I O board 20 WFM5250 Waveform Monitor Service Manual...

Page 37: ...power button may be red in the case of any detected hardware fault To isolate the symptom to a power supply fault it is necessary to view the fault LEDs on the Video I O board Remove the carrying case...

Page 38: ...el is not hanging boot This procedure requires disassembly and should be performed only if some front panel buttons light but neither the external nor internal display are functional Observe the seque...

Page 39: ...nction of the temperature measured on a variety of temperature sensors If a fan fails its corresponding LED lights up on the CPU board Fan 1 fails LED DS3 lights Fan 2 fails LED DS2 lights A fan failu...

Page 40: ...ss and hold OTHER then select Diag Monitor to display the diagnostic monitor screen 2 Navigate to pages 2 and 3 to display the power supply voltages If the Last value of any voltage is outside the all...

Page 41: ...his subsection contains the following items This preparatory information that you need to properly do the procedures that follow List of tools required to remove and disassemble all modules Procedures...

Page 42: ...trument screws Torx driver bit for T15 size screw heads 640 247 5 1 8 inch flat bladed screwdriver Screwdriver for unlocking cable connectors Standard tool 6 Angle Tip Tweezers Used for removing front...

Page 43: ...the front panel A thin piece of anti static foam works nicely 2 Remove the three pan head 32 X 0 250 T15 screws from the back of the instrument When reinstalling tighten these screws to 0 9 N M 8 in...

Page 44: ...ing tighten these to 0 45 N M 4 in lb 5 Remove the two 40 X 0 375 T8 flat head screws that secure the ground clip and the XLR connector to the rear panel When reinstalling install the ground clip as s...

Page 45: ...alling tighten these to 0 45 N M 4 in lb 2 Separate the Reference I O board from the rear panel 3 Place the I O board on the static free work surface Fan bracket Main Chassis 1 Remove the two pan head...

Page 46: ...wn onto the Video I O board 3 Disconnect the display cable from J7 on the FPGA board Pull the plug straight out from the connector to prevent damage 4 Place the FPGA board on a static free work surfac...

Page 47: ...two pan head 40 X 1 500 T10 screws from the front of each fan 4 When reassembling place the fans so that the labels are facing the fan bracket Insert the screws in the holes shown See Figure 6 Figure...

Page 48: ...Removal and Replacement Procedures Figure 7 CPU board screw and spacer posts 32 WFM5250 Waveform Monitor Service Manual...

Page 49: ...main chassis first then reattach screws Remove the front panel board from the bezel The front panel board can be removed from the bezel and replaced if needed 1 Disconnect the front panel cable from...

Page 50: ...screws See Figure 9 2 Carefully lift the LCD module pulling the LCD and backlight cables up through the slots on the main chassis 3 The LCD module should not be further disassembled The entire module...

Page 51: ...shipping 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 inf...

Page 52: ...Repackaging Instructions 36 WFM5250 Waveform Monitor Service Manual...

Page 53: ...ou order 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 Modu...

Page 54: ...Tektronix 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 f...

Page 55: ...40 X 0 187 PAN HEAD STEEL ZINC FINISH T 10 TORX DR 16 358 0915 00 1 BUSHING ALIGNMENT PHONE JACK 17 407 5765 00 1 BRACKET CABLE RETAINER FRONT PANEL CABLE 18 337 4609 00 1 EMI SHIELD USB HEADPHONES 1...

Page 56: ...EMI GASKET PROCESSOR HDMI 39 863 0708 00 1 CIRCUIT BD ASSY VIDEO I O 40 348 2003 00 1 BUMPER RUBBER CLEAR 0 375 DIA X 0 200 H 41 214 4748 00 2 HEAT SINK IC PGA 11X11 MQUAD 27MM BGA 1 1 X 1 1 X 0 25 H...

Page 57: ...Replaceable Parts Figure 10 WFM5250 Exploded View WFM5250 Waveform Monitor Service Manual 41...

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