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Panasonic PT51G44A - 51" PROJECTION TV, Руководство по обслуживанию

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Panasonic PT51G44A - 51

Содержание PT51G44A - 51" PROJECTION TV

Страница 1: ...sembly procedures and a complete parts list WARNING This Service Manual is designedfor experienced repairtechniciansonly and is not designedfor use by the general public It does not contain warnings or cautions to advise non technical individualsof potential dangers in attempting to service a product Products powered by electricity should be servicedor repaired only by experienced professionaltech...

Страница 2: ...us Optical Lens Adj 19 Centering Magnets Adj 20 Horizontal Size Adjustment 20 Digital Convergence 21 Serviceman Mode Electronic Controls 26 Entering Serviceman Mode 26 Toggle between Modes 26 Exitingthe Serviceman Mode 26 Purity Check 27 Service Adjustments Electronic Controls 28 Schematics Voltages Waveforms a A Board j 1 Left Portion Sheet 1A Right Portion Sheet 2A B Board Sheet 3A C Board Sheet...

Страница 3: ...FEATURE TABLE Table 1 Feature Table ...

Страница 4: ...Boards Designation ...

Страница 5: ... when menus are displayed Channel Buttons Press to select programmed channels Press to highlight desired features when menus are displayed Also use to select Cable Converter box channels after programming Remote Control infra red codes the TV AUX CABLE switch must be set in CABLE position Action Button Press to display Main Menu and access On Screen feature and Adjustment Menus TVNideo Button Pres...

Страница 6: ...revious 1I Component function buttons 1 DBS function buttons Programmable button that can operate up to seven 7 functions at once 11 Press to select TV or Video input I Press to select channels Use with volume buttons to navigate in menus II DBS function buttons II 11 Press to display Time status of Sleep Timer Channel Mdeo mode and Channel Caption Stabn Identifier I DVD function buttons 1 i1 Pres...

Страница 7: ...e previous channel 11 Programmable button that can operate up to seven 7 functions at once I Press to select TV or Video input 11 Press to select channels I Use with volume buttons to navigate in menus Press to display Main Menu and 1 access or exit On Screen features and Adjustment Menus I Component function buttons U FiguIre 7 Location of Controls Re Press to display Time status of Sleep Timer C...

Страница 8: ... See Figure 9 1 Remove the front decorative panel see Figure 8 2 Remove 4 screws from the bottom edge of the frame 3 Unplug the keyboard cable from the bottom of the screen frame 4 Grasp the frame on the sides at the bottom Pull forward at bottom push up frame then pull out top edge Screen See Figure 10 1 Place frame face down on soft surface 2 Remove Frame Channel from top edge 3 Remove screen br...

Страница 9: ...by 4 screws 2 at front behind the decorative panel 2 inside on bottom of optical frame 4 Remove Wires K1 connector and Speaker connectors A8 A9 on A Board and Pull out the Main Chassis Block I Figure 12 Chassis Removal Figure 11 Back Covers Removal Back Cover Asserrrbly Figure 11 1 The top back cover is secured with 6 screws around its perimeter 2 Lift bottom cover up and pull out at the bottom 3 ...

Страница 10: ... Bracket Cover i u r e 14 CRT Replacement CAUTION Support the CRT Assembly when loosening screws CRT Replacement 1 Remove CRT focus lens assembly 4 screws 5 Wire the anode leadwire Figure 16 Wire Guide 6 Install yoke with other CRT neck assemblies on CRT neck in the same order and position as removed from the defective CRT 7 Press yoke against bell of CRT and tighten the clamp just snug enough so ...

Страница 11: ...n The optical block mounting has holes to allow for the If the optical block is removed for service or is different size projection screens These mounts will replaced it is important that the correct mounting holes adjust to 61 inch 51 inch projectionscreens are used ...

Страница 12: ...61G54CA two matching sets of assemblies for the Fresneland Lenticularscreens are used The part numbers in each set are Set 1 Fresnel TKG2AH50181 Set 2 Fresnel TKG2AH50231 Lenticular TKG2AH50191 Lenticular TKG2AH50221 The screens are not interchangeable If replacement is required be sure to replace the screen with an equivalent The screen part number is imprintedat the bottom corner I ...

Страница 13: ...ation LG Green CRT Output B Switching Power Supply Horizontal Deflection LR Red CRT Output High Voltage Protector R Remote Control Board I C Digital Convergence S Second Tuner D EHT protector over deflection blanking Vertical T Line Filter stop blanking Diode Modulation drive X AN Terminals VAO K Customer Control Keyboard Y PIP Processing i YC 3 Line Digital Comb Filter ...

Страница 14: ...l Volume M i 0 Digital Conv Data Default Data Procedure 1 Apply a monoscope pattern 2 Connect the Lead of the Digital Voltmeter to TPBGND Cold Ground on 6 Board 3 Connect the Lead of the Digital Voltmeter to Test Point On 6 Board and confirm the B Voltages See FollowingTable Table 2 B Voltages Table ...

Страница 15: ...areas other than center area 7 PerformWhite Balance adjustments 0 0 0 R G B Dynamic Focus Adjustment 1 Focus adjustments should be performed after 1 hour of aging 2 Use oscilloscopewith 100 1 probe 3 Apply monoscope pattern 4 Adjust the Red Blue and Green focus VR on the focus block for best focus of overall picture of each CRT Figure 23 Figure 22 D Focus Adjustment Waveform Figure 23 Focus Pack 2...

Страница 16: ...correct distance right from the center of the green cross hatch Figure 26 12 Transfer lens cap to project green e 13 Press TVNideo on remote control 3 times to display the OSD Pos ADJ mode 14 Adjust the position of OSD to be at the center of pattern by pressing CH or VOL on remote control 15 Press 7 then Action on remote control 16 Press Power then Action on remote control to exit Digital Converge...

Страница 17: ...ect the plane that is to be copied Press Enter key ACTIONbutton 3 Usina the Channel UPIDOWN buttons selez the destination plane Press Enter key ACTIONbutton I mplate the misaligned rasters may be adjusted to merge with the good ones Note It may be necessaryto inject a monoscope pattern into one of the ANT terminals to complete some of the procedures Set TV to view test pattern before proceeding Pr...

Страница 18: ... until the pattern is complete B 111 2 mm c 1040 mm c 1234 mm Pay close attention to the actual dimensions of the D 740 mm D 890 mm pattern A Convergence Alignment Template Part No TQDPAAI9013 is available through MatsushitalPanasonic Services Using the Volume LEFTIRIGHT buttons on remote position the Height Rise Point of the Adjust the Height screen center line to the middle of the cursor Rise Po...

Страница 19: ...aster Pattern Using EASY2 straighten lines first Then adjust for good linearity If any unique Convergence to correct raster Press Pattern Keys 1or 3 on remote to cycle through raster patterns White Green Red Yellow Blue and Cyan Stop when the Green raster pattern is displayed Mode Grid lines cursor and text are green Cursor is Blinking Position OSD ONIOFF Clear ...

Страница 20: ...GHT to move the cursor to the desired area 3 Push DatdCursor Key Mute button to select Data Mode The cursor will stop flashing This indicates that the system is ready to adjust 4 Use Position Keys to adjust the selected area 5 Push DatdCursor key to select Cursor Mode Repeat steps 2 through 5 as needed to ensure good shape and linearity 6 Use any combination of adjustment modes to complete converg...

Страница 21: ...lue Raster Pattern Green or the White Red Green Blue raster pattern Usin steps outlined in and Q align Blue raster o merge with Green Press Store Key 7 button on remote to save data in P 1 Store Data Press Enter Key ACTION button on remote Enter Action R G B Selection 1 Pattern Rev I Store I Press Pattern Keys 1 or 3 on Display Yellow remote as needed to display Yellow Raster Pattern Red Green ras...

Страница 22: ...he VOL 4 button decrease on Receiver Red CHK appears in upper corner To toggle between Aging and Serviceman modes While the CHK is displayed on the left top corner of the CRT pressing the Action and the Volume Up buttons on the Receiver simultaneously will toggle between the modes Red CHK for Serviceman and yellow CHK for Aging 7 Press the Power Button on the Remote Control to select one of six Se...

Страница 23: ...To Check Purity Press the Recall Button on the Remote Control when in Serviceman Mode red CHK is displayed to enter the Purity Field Check Mode ...

Страница 24: ...se the one line convergence pattern from the NTSC generator 50 I I I 1 I 3 Set co 0 1 28 C1 100 and C2 0 1 28 Serviceman VCJ Cut Off Adjustments 4 Place the scope probe on test point TPA47G a Press video CH Av buttons on the Remote Control to select any of 5 Adjust 82 for 3 volts from ground to black level the Service VCJ Cut Off Adjustment Addresses a in C Figure 27 B5 Video Adjust 0 15 B6 Audio ...

Страница 25: ...cture even shades of gray and no color tint 3 Adjust the noise level in the red and blue tubes to in the low light areas match the noise level in the green tube 4 Repeat the High Light and Low Light White Balance again until the white balance tracks from 1S1 PIP contrast I I 1 0 127 1 37 I I S3 Lower 119 1 0 255 1 149 k Left 119 S5 Right 119 S6 Umer 1116 b 9 Right 1116 I I 0 255 1 124 ISA Not Appl...

Страница 26: ...egative lead to TPA13 GND Note 15 seconds aging is required prior to performing the followingprocedure Filter Adjustment M2 Preparation 1 Connect a signal generator sine wave to antenna 4 2 Connect a DVM AC Range as follows Positive lead to TPE1 and negative lead to GND 3 Connect a scope as follows Positive lead to TPE11 negative lead to TPA13 GND Procedure 1 Apply the following signal from the si...

Страница 27: ...echanical S Board Note Allow 20 seconds of aging prior to making the flowing adjustments Preparation 1 Apply color bars to the video input 2 Connect an oscilloscope to TP12 on S Board Use cold ground for scope connection Set the scope at Horizontal Sweep rate 20 s time base 3 Connect a DVM to TPlO on S Board 4 Connect a jumper between TPA7 and TPA13 GND on the A Board Procedure 1 Adjust L2109 on S...

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