Mitsubishi WD-52627 Training Manual
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Mitsubishi WD-52627 Training Manual

Projection television, down-to-1 high speed troubleshooting
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Download this manual See also: Owner's Manual
Projection Television
Training Manual
Including...
Down-to-1
High Speed Troubleshooting
1080p
DLP™
V29
WD-52627
WD-62628
V30
WD-52628 WD-62827 WD-73727
WD-62628
V31
WD-62927
WD-73927
COPYRIGHT © 2006 MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
WD-73827
ALL RIGHTS RESERVED
T
ECHNICAL
RAINING
2005
2006
720p
LCD
V28L
WD-52526 WD-62526
V28
WD-52527 WD-62527
WD-52528 WD-62528

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Summary of Contents for Mitsubishi WD-52627

  • Page 1 2006 Projection Television Training Manual Including… Down-to-1 High Speed Troubleshooting 1080p 720p DLP™ V28L WD-52627 WD-52526 WD-62526 WD-62628 WD-52628 WD-62827 WD-73727 WD-52527 WD-62527 WD-62628 WD-73827 WD-52528 WD-62528 WD-62927 WD-73927 COPYRIGHT © 2006 MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC. ALL RIGHTS RESERVED...

  • Page 3: Table Of Contents

    2005-2006 PROJECTION TELEVISION TECHNICAL TRAINING AND TROUBLESHOOTING MANUAL TABLE of CONTENTS Introduction About Mitsubishi Electric US ................. 1 Chapter 1... Display Technologies and PTV Product Line Display Technologies ..................1-1 PTV Product Line ....................1-3 Chapter 2... Disassembly and Service Engines ......................

  • Page 5: Introduction

    Introduction About Mitsubishi Electric US Companies Mitsubishi Electric US markets an extensive line of consumer, commercial and industrial electrical and electronics products. Mitsubishi Electric has more than 2,000 employees in 30 locations throughout the USA. www.MitsubishiElectric.com Mitsubishi Digital Electronics America, Inc.
  • Page 6 Mitsubishi Electric US Products & Services Automation Products Home Theater, Presentation & Imaging Products • Computer Numerical Controllers • High Definition TVs • Industrial Sewing Equipment • LCD Projectors • Motion Control Systems • Big Screen TVs • Programmable Logic Controllers •...

  • Page 7: Display Technologies

    LCoS set’s performance with a consumer. Tables 1-1 and 1- Mitsubishi’s use of LCoS technology is in the form of a 2 outline some of the strengths and weaknesses of each 3 chip system carried over in the 82” rear projection one.
  • Page 8 Manual covers it in-depth, no further discussion will DLP and LCoS can be configured as either single, or 3 be necessary. device engines. Mitsubishi currently uses a single chip DLP and a 3 chip LCoS system. LCD, DLP and LCoS are known as “Micro-Display”...
  • Page 9 Color Wheel Projection Lens Lamp Prism Shaping Lens Relay Condensing Lens Lens Figure 1-2: DLP Light Engine The single device DLP Light Engine, shown in Figure Figure 1-3 shows an LCoS engine in a 3 chip arrange- 1-2, produces a color picture using a color wheel and ment.
  • Page 10 Performance Improvement SmartShutter™ is a dynamic aperture system that im- proves black levels and adds a large palette of dark Technologies grey shades. It does this by reducing light output during The 2005-2006 PTV product line uses several new dark scenes without negatively affecting other picture performance improvement technologies for LCD and characteristics.
  • Page 11 Louvers Area Area Figure 1-5: Smart Shutter High Contrast Unit The 1080p technology in Mitsubishi’s DLP product line offers twice the pixel resolution of 720p HDTV. See Figure 1-6. Not only does this technology give a full 1920 x 1080 resolution, it does so using half the micro- mirrors.
  • Page 12 720p DMD Chip 1080p DMD Chip Pixel Arrangement Square Pixel Arrangement Diagonal Pixel Arrangement Final Pixel Image 1280X720 1920X1080 720p DMD 1080p DMD Figure 1-7: 720p DMD vs. 1080p DMD...
  • Page 13 The data is divided into two subframes, each with half the original data. During one of the subframes, the image is shifted down by 1/2 pixel. The eye integrates the two consecutive subframes to create the final image. This process is completd every 1/60 of a second, dis- playing all of the data, every frame, just as is the case for other traditional DMDs.
  • Page 14 Dark Detailer 1080p Module Dynamic Black (DB) Module Figure 1-9: DLP Light Engine - 1080p and Dark Detailer Modules Dark Detailer™ is another type of dynamic aperture system used with DLP based models. It displays deeper blacks and better dark scene detail. The location of the Dark Detailer, also referred to as the Dynamic Black (DB) module, is shown with its cover removed in Figure 1-9.
  • Page 15 Figure 1-11: One Sided Dynamic Aperture • The Interface PWB between the Chassis and Because some people can experience a “rainbow ef- Light Engine is convenient for troubleshooting. fect” due to differences in their persistence of vision, a • Access to the Electrical Chassis is improved for 10,800 RPM Color Wheel is now used in the 2005- troubleshooting and PWB replacement.
  • Page 16 V27 Chassis 1-10...
  • Page 17 V28L Chassis 526 Series LCD HDTV Model WD-52526 WD-62526 Screen Size 52" 62" Aspect Ratio 16:9 (widescreen) 16:9 (widescreen) Height 33.9" 40.3" Width 49.6" 58.3" Depth 17.8" 19.9" Height On Base 51.9" 58.4" Weight 110 lbs. 133 lbs. Power Consumption 225 Watts 225 Watts WD-52526 Shown on Optional Matching Base Optical System Inputs / Outputs (Digital) Light Engine Proprietary 3LCD...
  • Page 18 V28 Chassis 1-12...
  • Page 19 V28+ Chassis 1-13...
  • Page 20 V29 Chassis 1-14...
  • Page 21 V30 Chassis 1-15...
  • Page 22 V30 Chassis 1-16...
  • Page 23 V30+ Chassis 1-17...
  • Page 24 V31 Chassis 1-18...

  • Page 25: Chapter 2

    Chapter 2 Disassembly and Service V28L / V28 / V28+ LCD Optical Engine FAN-PLATE LAMP-FAN LAMP-FAN INTAKE BRACKET COVER LIGHT ENGINE INTERFACE BALLAST COVER & BALLAST ENGINE-PLATE...
  • Page 26 V29 / V30 / V30+ / V31 DLP Optical Engine (View from front) Lamp Duct Lens Cushion Bottom Plate Engine Plate Lamp Fan (120W Version) (note on 150W version Lamp Fan is in front) Ballast Plate Ballast Fan (View from back) Engine PWR PWB Ballast Cover Lamp Cartridge...
  • Page 27 Engine replacement instructions are included in the applicable service manuals as well as being included with the replacement part when it is shipped. ENGINE DATA COPY (V29/30/31 Only) After engine has been installed the engine data needs to be copied to the chassis. Press MENU + 2457 + 0 Press ENTER to select copy light engine EEPROM to DM...

  • Page 28: Identification

    720P LCD Chassis Engine Engine Chassis EXTERNAL TESTING (WD-52627 PICTURED) The PWB chassis can be operated outside of the cabinet for testing. This gives access for voltage or signal measurements on all PWBs. Detailed instructions are included in the service manual.
  • Page 29 PWB LOCATIONS TERMINAL-PWB POWER PWB RISER PWB MICRO PWB FMT PWB E2P PWB DM PWB DEMOD2 PWB DEMOD1 PWB...
  • Page 30 PWB NAME LAYER CIRCUIT PWB FUNCTION Converts input AC current to DC supply voltages and creates POWER1 2 layer V28 POWER SUPPLY ballast board voltage. Converts input AC current to DC supply voltages and creates POWER2 2 layer V29 POWER SUPPLY ballast board voltage.

  • Page 31: Mirror Access

    MIRROR ACCESS Remove (10) screws maked “A” below for 52” and 62” models and (19) screws maked “A” below for 73” models. Panel can then be removed to expose the mirror and inside of the upper cabinet (52” and 62” models) (73”...
  • Page 32 LCD ENGINE ACCESS PANEL Remove (2) screws shown below to gain access to the LCD engine area for cleaning of debris (V28/V28+ only). (View from Front of unit)
  • Page 33 Displays used to indicate Pb-free Lead Free Solder PCBs will be marked, indicating the level of Pb-free Mitsubishi's 2005-2006 product line, including the V28, construction. Table 2-1 defines the levels by phase and V29, V30 and V31 chassis, will be constructed using shows the different symbols that will be displayed on lead free solder.
  • Page 34 To help eliminate problems working with lead free sol- der, consider the following points. The Mitsubishi standard for service requires the use of Tin-Silver-Copper ( Sn-96.5, Ag-3.0, Cu-0.5) solder. It can be obtained through the Parts Department. Order part number: PB FREE SOLDER...

  • Page 35: Option Menu

    Chapter 3 Adustments Option Menu Data Transfer The Option Menu and Option Menu access is the same The data Transfer mode is activated when in the Ser- on all chassis. To activate the Option Menu press vice Mode by pressing “0”. Table 3-1 show the Data “MENU-2-4-7-0”.

  • Page 36: Mechanical Adjustments

    MENU-2-4-5-7-0 Data Transfer Display Description Copy Engine E2PROM to DM Transfers Engine data to DM E2PROM Restore Backup Restores data to factory values UPLOAD TERMINAL BOARD DATA DO NOT USE Download WB Alignment to FMT Transfers Engine data to FMT Table 3-2: DLP Chassis Data Transfer Choices •...
  • Page 37 V28 Mechanical Adjustments Preliminary In the V28 chassis, the Mechanical Adjuster is accessed (Refer to Figure 3-3) from the rear. Refer to the disassembly instructions and 1) Loosen the Fixing Screw (1) and (2) in the remove the BACK-COVER. Slide -Lock-Mate. 2) Loosen Nuts (1) and (2) on the Adjuster Tools Required: 3) Loosen [A-1] and [A-2] on the Adjuster (4mm...
  • Page 38 Keystone Distortion Adjustment (Figure 3-4) 1) Loosen [A-1] and [A-2] so they clear [A-3]. 2) For distortion at the top of the picture rotate [A-3] counter-clockwise. 3) For distortion at the bottom of the pic- ture rotate [A-3] clockwise. Figure 3-4: Keystone Adjustment Rotation Adjustment (Figure 3-5) Clockwise Rotation Needed...
  • Page 39 DLP Chassis Mechanical Adjustments Required Tools Test Signal Activation • 4mm hex wrench (10 inches long mnimum) Use the same procedure as in the V28 chassis. • 5mm Allen wrench (10 inches long minimum) (MENU-2-4-5-7-REW) • 10mm hex or Phillips driver Prelminary Mechanical Optical Engine Adjustments are made using the UNIT-ADJUSTER shown in Figure 3-6.

  • Page 40: Adjustment Procedures

    RUBBER WEDGE Figure 3-8: Rubber Wedge (52 and 62 inch models only) Adjustment Procedures Adjustment Locations The Mechanical Adjustment are accessed through the CAUTION: Do Not force an adjustment past the end of it’s range, UNIT-ADJUSTER damage front opening for the Card Reader. Locations of the may result.
  • Page 41 Rotation Adjustment Adjust [A-2] to remove any picture rotation Horizontal Keystone Adjustment Adjust [A-3] to remove horizontal keystone distortion. NOTE: Vertical Positioning may shift Vertical Keystone ADjustment Adjust [A-1- To remove vertical keystone distortion. [A-1] can only be accessed by the front access hole shown above.

  • Page 42: Electrical Adjustments

    Electrical Adjustments The only Servicer electrical adjustments are picture position (centering). These adjustments are the same on all chassis (V28 / V29 / V30 / V30+ / V31). They are also the same as last years DLP models. They are repeated here as a reference.

  • Page 43: Down-To

    Chapter 4 Down-to-1 Troubleshooting The goal of Down-to-1 troubleshooting is… using a minimum amount of time and test equipment, make an accurate diagnosis of a failure 9 out of 10 times. The 2005-2006 Micro-Display product line lends itself to this discipline very well. Figure 4-1: Front Panel LEDs Using The Front Panel LEDs Normal Indications…...

  • Page 44: Error Codes

    Self Diagnostics…When an abnormal condition is in- 1) With the TV Off dicated by the front panel LEDs. Or, when the TV turns 2) Press and hold the front panel "MENU" and On and then shuts Off, the Self Diagnostics help isolate "DEVICE"...

  • Page 45: Interface Troubleshooting

    Interface Troubleshooting Figure 4-2 shows the layout of the Interface for the LCD, V28 Chassis. Figure 4-3 shows the layout for The Interface PWB provides the service technician with the DLP, V29/30/31 chassis. These layouts are as the a convenient test point for many of the peripheral com- technician is viewing the PWB from the rear of the set.

  • Page 46: Symptom/Cause Troubleshooting

    Symptom/Cause Troubleshooting • Power Supply PWB • Micro & Terminal PWB Use the following symptom/cause charts to determine the most likely cause of a failure. First use the PWB Symptom Cause chart to narrow down the problem to a PWB. Then check the connec- The areas covered are: tions to the PWB specified.
  • Page 47 OPTICAL ENGINE TROUBLESHOOTING Sym ptom Ca use W ha t to che ck FMT does not turn on lamp due to fault Check error code on front pannel. Check problem detection indicated. No DC supply to ballast Check power PW B PL connector for approx. 340VDC. Check connec tions PL-JE, JE-CN2 No Light No Lamp enable signal...
  • Page 48 POWER PWB TROUBLESHOOTING SYMPTOM CHECK POINT POSSIBLE CAUSE Check +15VS @ connector PD pin 1 Check Q9E00 circuit ERROR CODE 51 Check -15VS @ connector PD pin 7 Check Q9E00 circuit Check doubler circuit ERROR CODE 34 Check 340VDC @ connector PL Check ballast circuit IC9A24 circuit Check 3.3V @ connector PA2 pin 1...
  • Page 49 M icro & T erminal PWB T roubleshooting Sym ptom Possible Ca use s No audio or video on one input Physical damage on RCA jack, broken solder or trace at pin on term inal board No video on all inputs TA connecter loose, No Vcc to IC2K01, IC9C00, IC9C10, IC9C20 No audio on all inputs...

  • Page 51: Power Supplies

    Chapter 5 Block Diagrams & Signal Path Power Supplies Power Supply Basic Description Figure 5-1 shows the Basic Power Supply that is the Although the LCD Light Engine models (V28 chassis) basis for all the chassis types. The Main Power Supply and DLP Light Engine models (V29, V30, V30+,V31) is on PWB-POWER.
  • Page 52 Part Number Models ASSY-PWB-POWER1 930B933001 All V28 models WD-52627 / WD-52628 / WD-62627 / ASSY-PWB-POWER2 934C159001 WD-62628 / WD-73727 WD-62727 / WD-62927 / WD-73827 / ASSY-PWB-POWER2 934C159002 WD-73927 Table 5-1: PWB-POWER Part Numbers Switch Mode Regulator for the HDD is located on the PWB-POWER for these The Switch Mode Regulator (SMR) on the PWB- two chassis types.
  • Page 53 the same on all three of the PWB-POWER boards. It Although the SMR circuitry is the same on all PWB- is the original source for both Standby and Switched POWER boards, the Standby and Switched DC to DC supplies. Converter circuitry does vary according to chassis type. With the TV Off, AC from the PS connector is applied DC to DC Converters.
  • Page 54 Figure 5-3A: V28 PWB-POWER DC to DC Supplies...
  • Page 55 Figure 5-3B: DLP PWB-POWER DC to DC Supplies...
  • Page 56 Ballast DC Supply This circuit is the same on all three Power boards. A simplified version of the circuit is shown in Figure 5-4. Fan DC Supplies and Control The DC supplies for the fans are gen- erated on the PWB-INTERFACE board,.
  • Page 57 Figure 5-6: V29/V30/V30+/V31 Fan Supplies Power Distribution PWB-ENG-PWR When a specific PWB is suspected as the cause of a It was previously mentioned that the PWB-ENG-PWR problem, the following should be checked before or- board is added in DLP models. Figure 5-7 shows this dering a new board: circuitry.
  • Page 58 Figure 5-7: DLP Engine Power Supply Figure 5-8: Hard Disc (HDD) Power Supply (V30+ and V31 Only)
  • Page 59 Figure 5-9...
  • Page 60 Figure 5-10 5-10...

  • Page 61: Video Signal Path

    Video Signal Path The selected Main and Sub Video signals are directed through the PWB-RISER to A/D Converters on PWB- Analog Video Path DM. The outputs from the A/D Converters are directed The Video signal path is also similar on all the chassis to 3DYC, Line Double and PIP/POP circuitry.
  • Page 62 Digital Video Signal Path In the V31 chassis a conventional VGA input is added Figure 5-12 illustrates the Basic Digital Video Signal on the PWB-FORMAT. Path. The Digital Signal output from the Main Tuner is an I.F. signal. The signal from the Main Tuner is di- Note the in the V30+ and V31 chassis the PWB- rected to PWB-DEMOD1.
  • Page 63 Figure 5-13: Analog Video Signal Path 5-13...
  • Page 64 Figure 5-14: Analog Video Signal Path Figure 5-15: Video Record Path (V30+ and V31 only) 5-14...

  • Page 65: Sound Signal Path

    Figure 5-16: Sound Signal Path Sound Signal Path Figure 5-16 shows the Sound Signal Path in both LCD The only new circuitry is Speaker Short Detect circuit and DLP chassis. The Sound Circuitry is the same on shown in Figure 5-17. both LCD and DLP chassis.

  • Page 66: Control Circuitry

    Control Circuitry • IC8G01 FORMAT µPC on PWB-FORMAT Overall Control Circuitry • IC7R05 TVGOS µPC on PWB-RISER There are 5 Control µPCs in the LCD and DLP chassis. • IC7A00 TV µPC on PWB-MICRO Figure 5-18 shows the interconnect paths between the •...

  • Page 67: Lamp Control Circuitry

    Lamp Control Circuitry Figure 5-20. Mainly in the V28 the LAMP-EN com- Figure 5-19 shows the Lamp Control Circuitry in V28 mand is from the FMT µPC, and in the DLP chassis it chassis, and Figure 5-20 the circuitry in the DLP chas- comes from the Light Engine sis.
  • Page 68 Engine Protect Circuitry DET status line. The FILTER-DET line is shaded in This circuitry monitors the temperature in the Light En- Figure 5-21. gine, and Lamp, and also monitors the operation of the various cooling fans. Figure 5-21 shows the Engine Short &...
  • Page 69 Figure 5-22: DLP Engine Protect Circuitry Figure 5-23: Short Detection Circuitry 5-19...
  • Page 70 5-20...
  • Page 72 Copyright © 2005 Mitsubishi Digital Electronics America, Inc. 9351 Jeronimo Road • Irvine, CA 92618-1904...

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