Hitachi 61HDX98B User Manual Download

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Summary of Contents for 61HDX98B

Page 1: ...important that the service technician read the Safety Precaution and Product Safety Notices in this service manual SAFETY NOTICE USE ISOLATION TRANSFORMER WHEN SERVICING Components having special safety characteristics are identified by a Aon the schematics and on the parts list in this Service Data and its supplements and bulletins Before servicing the chassis it is important that the service tec...

Page 2: ...d safely repair complex products such as those covered by this manual Improperly performed repairs can adversely affect the safety and reliability of the product and may void warranty If you are not qualified to perform the repair of this product properly and safely you should not risk trying to do so and refer the repair to a qualified service technician WARNING Lead in solder used in this produc...

Page 3: ... to correct the situation and 3 inform you of your right to bring a complaint to the Commission pursuant to procedures set forth in Subpart E of Part 68 FCC Rules and Regulations The telephone company may make changes in its communications facilities equipment operations of procedures where such action is required in the operation of its business and not inconsistent with FCC Rules and Regulations...

Page 4: ...his test with the instrument AC switch in the off position Leakage Current Hot Check With the instrument completely reassembled plug the AC line cord directly into a 120V AC outlet Do not use an isolation transformer during this test Use a leakage current tester or a metering system that complies with American National Standards Institute ANSI Cl 01 O Leakage Current for Appliances and Underwriter...

Page 5: ...high voltage avoid being unnecessarily close to the pic ture tube and the high voltage component Do not operate the chassis longer than is necessary h X radiation Shield 1 This receiver is provided with X ray shield plates for protection against X radiation Do not remove X ray shield plates A 6 C or D shown in Fig 1 unnecessarily when troubleshooting and or making test measurements 2 To prevent X ...

Page 6: ...ty These chassis can be safely serviced only with an isolation transformer inserted in the power line between the receiver and the AC power source for both personnel and test equipment protection c Some TV receiver chassis have a secondary ground system in addition to the main chassis ground This secondary ground system is not isolated from the AC power line The two ground systems are electrically...

Page 7: ...s covered by this service data might be equipped 7 Do not apply AC power to this instrument and or any of its electrical assemblies unless all solid state device heat sinks are correctly installed 8 Always connect the test instrument ground lead to the appropriate instrument chassis ground before connecting the test instrument positive lead Always remove the test instrument ground lead last 9 Use ...

Page 8: ... with boards using the familiar round hole use the standard technique as outlined in paragraphs 5 and 6 above Removal 1 Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Car...

Page 9: ... end of a small gauge jumper wire and carefully crimp it around the IC pin Solder the IC connection 4 Route the jumper wire along the path of the cut away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair defective copper pattern at connect...

Page 10: ...onent end caps or terminals 2 Without pulling up carefully twist the component with tweezers to break the adhesive 3 Do not reuse removed leadless or chip components since they are subject to stress fracture during removal Chip Component Installation 1 Put a small amount of solder on the board soldering pads 2 Hold the chip component against the soldering pads with tweezers or with a miniature all...

Page 11: ...20V AC and turn on TV 5 Turn off set immediately after checking circuit operation 3 Confirm test pattern on CRT is a usable picture then slowly adjust jig until the picture disappears and TV shuts down 6 Unplug set for one minute to reset shutdown circuit Remove jig and voltmeter Chassis I t I connector Deflection P W B High impedance H V meter I FBT THOl Disconnect the I pin on IPO4 from B line C...

Page 12: ... Maxoutput IO Watts Center 7 5Wattsperchannelat 10 distortion 8 Ohmimpedance Maxoutput 10 Watts Anode Voltage 31 5 kV ZeroBeamCurrent Brightness 61HDX98B 150 cd m2 white screen Speakers 2 Woofers 5 inch 12 mm round 2 Tweeters 2 inch 5 mm round 1 CenterSpeaker 4 inch IO mm round Dimension Height in Width in Depth in Weight Ibs 61 HDX98B 60 31 56 9ils 29 51 s 340 Circuit Board Assemblies C P T B P W...

Page 13: ...y pulling it away from the case cover Wing L Position Fig B During Insertion 1 Please refer to direction for insertion as shown in Fig B L position Insert connector until CLICK sound is heard 2 Make sure the connector is pressed right in so that it has a good contact with the spring 3 Confirm the contact by pulling the connector slightly Don t pull hard because it may damage the connector 4 Cover ...

Page 14: ...V channels If you subscribe to DIRECTV Programming and are in DIRECTV mode you scroll up through DIRECTV channels In the menu system CH moves the highlight up and adjusts menu controls TV SAT Toggles between TV mode and DIRECTV mode INFO Brings up the on screen channel banner Press when in the program guide to get more information on the highlighted program or channel S VIDEO VIDEO L MONO v I NPUT...

Page 15: ...by Digital receiver or decoder Dolby Digital offers theatre quality sound six audio channels You will not be able to use this jack and the LFE SUBWOOFER OUT simultaneously ANTENNA B IN Use to connect an off air or terrestrial antenna or cableTV signal to theTV ANTENNA A IN Use to connect a second off air or terrestrial antenna or cable TV signal to the TV You can also use the ANT B IN or ANT A IN ...

Page 16: ...nd the DIGITAL AUDIO OUT an optical output simultaneously INPUT 1 Lets you connect a baseband NTSC analog component such as aVCR laserdisc player Internet access device or DVD player l R AUDIO provides right audio connection The right audio connector is usually red l L AUDIO provides left audio connection The left audio connector is usually white l VIDEO provides composite video connection The vid...

Page 17: ...press the CH CH INPUT or digit buttons on the remote control TV CABLE SAT l VCR 0 AUDIO 0 MUTE ANT Antenna Switches the source of the off air signal between ANTENNA A and B MOVE Moves the PIP window to a different corner of the television screen with each press You can also use the Arrow keys to move the PIP window when no menus are on the screen VOL UP DOWN Adjusts the TV s audio volume LAST Move...

Page 18: ...system and adjust the menu controls Also move the PIP window when no menus are on the screen USER Toggles through user profiles HELP Press this button when a menu is displayed to view HELP text which gives a description of the chosen menu SELECT When in the menu system selects highlighted items DIGIT BUTTONS 0 9 Enters channel numbers and time settings directly through the remote control For more ...

Page 19: ...l communicates with the three sources In SAT mode you tune to channels that come from DIRECTV if you subscribe to DIRECTV programming Enter channel numbers that are three or four digits long Then press SELECT to tune In TV mode you tune to channels that carry the terrestrial off air or cable TV signal l To tune to a digital channel enter channel numbers that are one two or three digits long If nec...

Page 20: ...ce between the red and green levels a Brightness Adjusts the brightness of the picture l Sharpness Adjusts the crispness of edges in the picture You can have six different picture settings one for analog channels one for digital channels including DIRECTV channels and one for components attached to INPUT 1 2 3 and 4 FRONT To make settings for analog and digital channels 1 Enter the mode for which ...

Page 21: ...uces a cleaner smoother picture by reducing picture static or any type of interference This is especially useful for providing a cleaner picture in weak analog signal conditions When Noise Reduction is on picture detail is somewhat decreased While running Magic Focus you may notice that flashing letters MAGIC FOCUS change to dashes to Selecting Magic FOCUS begins a process which aligns the blue gr...

Page 22: ...ency to the level you desire To return to the previous menu select Last when you are finished and press SELECT SPEAKERS The Speakers menu lets you specify the type of speakers and volume levels you would like to use From this menu you have the following options Speaker Setup Displays a list of speaker options describing the various ways you can use internal and or external speakers From this list ...

Page 23: ... if you want the sound to come from the TV s internal speakers and the external rear speakers you have connected to theTV Make sure to turn the back panel s INT INT EXT Front Speaker switch to Internal 7V Rear External Speakers w TV Center Choose this option if you want to use only the TV s internal center speaker and external front and rear speakers you have connected to the TV Make sure to turn ...

Page 24: ...fier you have c onnected to TV rear spea kers and the internal center speaker in the TV External Front w Amp Rear WI TV Center Ext Front Rear w Amp w TV Center Choose this option if you would like to use the external front speakers with a separate amplifier external rear speakers with a separate amplifier as well as the internal center speaker in the TV ll RIGHT When you select Sound Check you wil...

Page 25: ...peakers Depending on your speaker setup any combination of the following options will appear l Mono Plays the sound in mono only and outputs sound from the front left and right speakers only This is a good choice when receiving broadcasts where distance from the broadcasters makes the stereo signal weak The channel banner displays the word Mono when you tune to a program that is broadcast in mono ...

Page 26: ...peaker audio stream through the wireless speakers Center Delay Allows you to set delay of center audio signal Surround Delay Allows you to set delay of surround audio signal LOUDNESS When turned on loudness allows the setting of the volume control to also control the output frequency response High and low frequencies are boosted at lower volume levels SAP When turned on Second Audio Program SAP pl...

Page 27: ...m Alignment Lens 01 20 Blue Defocus Adjustment 01 21 l Red Green and Blue White Balance Tracking 01 22 l Sub Brightness Adjustment Alternate Method 01 23 Horizontal Position Fine Adjustment 01 24 Digital Convergence Alignment Procedure Digital Convergence Overlay Smooth and FulI 01 25 3X3 and 7X5 Stopping positions 01 26 13X9 Stopping positions 01 27 l Digital Convergence Remote Control 01 2s l Cl...

Page 28: ... 01 4 GENERAL BLOCK DIAGRAMS SECTION power supply Block Explanation _ _ _ _ _ _ __ _ _____________________ _ __ _ 4 01 power supply Block Diagram ___ ___ _ _ _ ____________________ _ 4 02 DM 1 Module Front End Block Explanation _ __ _ _ _ _ _ _ ____ _______ _______________ 04 03 DM 1 Module Front End Block Diagram _ _ _ _ _ _ __ _ ____________________ _________ 04 05 AV Selector Block Explanation ...

Page 29: ..._________ _ _l_ l _ 06 01 7 VIDEO SIGNAL INFORMATION l Video Signal Main and Terminal Circuit Diagram __ _ ___________________________________ 07 01 ABL Circuit Diagram ____ _ _ _ _ _________ _ __ 07 02 l Horizontal and Vertical SWEEP LOSS DETECTION Circuit i 07 03 8 AUDIO CIRCUIT INFORMATION l Audio Signal Main and Terminal Board Circuit Diagram OS 01 Audio SURR0UNI J Board Circuit Diagram ______...

Page 30: ...TSC CLEAR 14 Side Pin FULL NTSC CLEAR 15 Horz Size Adj SMOOTH NTSC CLEAR 16 Vertical Size Adjust SMOOTH NTSC CLEAR 17 Trapezoid SMOOTH NTSC DCU Grid CLEAR 18 Side Pin SMOOTH NTSC CLEAR 19 Beam Form NORMAL NTSC 20 Lens Focus Adjust FULL NTSC 21 Static Focus Adjust FULL NTSC 22 Blue Defocus FULL NTSC 23 White Balance Adjustment FULL NTSC 24 Sub Brightness Adjustment FULL NTSC Color Bar 25 Horz Posit...

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Page 33: ...al O 40ns l 20ns 2 Ons 3 t 20ns 73 APC NT APACON PEAK f0 NTSC o 7 7 0 Off 1 4MHz 2 3 3MHz 4 2 5MHz TAI 276AN 74 APC SD APACON PEAK f0 SDTV o 7 6 5 Off 6 13MHz 7 l OMHz 8 8MHz TAl276AN 75 APC HD APACON PEAK f0 HDTV o 7 5 TAl276AN 76 SVMLMT Velocity Modulation Limit o 1 0 OParabola Modulation OFF 1 On TA1276AN 77 DCR PO D C Restoration Point o 7 0 0 0 to 7 42 TA1276AN 78 DCR RA D C Restoration Rate ...

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Page 35: ...SSEMBLY DP 85 MAGNETS Adjustment Points II FRONT 1 Centering magnet RED 2 Centering magnet GREEN 3 Centering magnet BLUE 4 Beam Form Magnets 5 Beam Alignment magnets 6 Focus Block Assembly RED GREEN BLUE Also Drive Adjustment controls for RED GREEN BLUE PAGE 01 06 ...

Page 36: ...ON AS PACK SHOWN Pre Set fully counter A Before Pre Heat Run clockwise 1 Red and Green Drive VR on the CRT PWB Not on Blue CRT Pre set 12 2 between the 12 o clock SCREEN VR and 2 o clock position DRIVE VR 3 Focus VR on focus pack Pre Set fully clockwise FOCUS VR FOCUS PACK Projection Front View PAGE 01 07 ...

Page 37: ...een VR should be turned clockwise gradually until that particular color is barely visible 41 Repeat for the other two colors FOCUS ADJUSTMENT 1 Short the 2pin sub miniature connector on the CRT PWB TS to remove any color not being adjusted and adjust one color at a time The adjustment order of R G and B is just an example 2 Adjust the Focus VR for Red until maximum Focus is achieved 3 Repeat for B...

Page 38: ...ceive any NTSC signal displayed press the 8 key mode 2 Screen Format is FULL on remote 3 Press and Hold the 9 Press the SERVICE ONLY SERVlCE ONLY switch on switch to return to normal the deflection PWB mode 4 Press the ANT key on the Remote then press the EXIT key This is the Phase adjustment mode 5 Adjust data value using the keys indicated in the chart until the data matches the values indicated...

Page 39: ... so that the center of Video matches the location of the Digital Cross 5 Enter the 12C Bus align hatch pattern noted in ment menu and select he data step 4 Write down t value Exit from the Menu 1 Item 191 HPOS S and adjust the data to the same value as the data value entered for the NORMAL mode Step SMOOTH WIDE Mode Adjustment 1 Receive any NTSC crosshair signal 2 Screen Format is SMOOTH 3 Press t...

Page 40: ...en press the POWER but ton The Service Only switch is on the De flection PWB Adjustment Procedure GREEN 1 Apply covers to the RED and BLUE lenses or short the 2P Sub Mini connector TS on each CRT PWB to pro duce only GREEN 2 Turn the Green deflec tion yoke and adjust the TILT until the green is level I 2mm tolerance See diagram RED I Remove cover from RED CRT and align RED with GREEN 2 1 mm tolera...

Page 41: ...e beam align ment adjustment Short circuit 2P subminia ture connector plug pins of Red R and Blue B on the CRT boards and project only Green G for Red and Blue in the same way 9 Red R focus on focus pack IO Blue B focus on focus pack 5 1 1 Upon completion of adjust ment place a small amount of white paint on 2 Put Green G tube beam the beam alignment mag 6 alignment magnet to the cancel state as s...

Page 42: ...This magnetis normallymadeof metalandis locatedup againstthebacksideof the yokeassembly Not down on theneckof theCRT CENTERING MAGNET Figure 1 Figure2 showstheBeamForm andAlignmentmagnet This magnetis normallymadeof plasticandis locatedcloseto the CRT PWBonthe neckof the CRT BEAM FORM ALIGNMENT MAGNET ADJUSTMENT ZERO FIELD SPACER NO ADJUSTMENT 2 POLE BEAM Fimre 2 ALIGNMENT MAGNET PAGE 01 13 ...

Page 43: ...e actual measurements for and Blue Red and Blue offset are as Adjust the centering follows magnets for G on the back Red is aligned 10 mm left of side of the Deflection Yoke center and align the center of the Blue is aligned 30 mm right of G Crosshatch to the center center of the overlay 2 The electrical focus should have been adjusted 4 5 Yoke Tilt should have been completed 6 The convergence DCU...

Page 44: ...l Factory Adj Mode tl See ftgure below Preset I 2 Choose item 71 HSIZE F 6 Choose item 171 HSIZE F 2 Beam Form adj Complete with the remote up down 3 Receive any NTSC signal with remote up down keys keysr and NoTE the current 7 Return item 7 data value resolution chart would be data value Reduce to mini best with the one noted in step mum 3 Display only Green by 2 of Adjustment Proce dure shorting...

Page 45: ... on on the left and right hand side of the overlay 3 Press the MENU key on remote control to exit Ser vice Menu NOTE Centering magnet may be moved to facilitate Distance is important not cen remote control to exit Ser tering vice Menu NOTE There are two different HORIZONTAL SIZE overlays used during this proc Display Mode FULL or ess SMOOTH WIDE as Depicted Alternate Method Adjust Horizontal and V...

Page 46: ... button the Service Only Switch on together to display Service together to display Service the Deflection PWB then A dj Mode Adj Mode press Power See Page 01 3 Choose item 161 TRAP F 3 Choose item l II TRAP S 26 with the remote up down with the remote up down I Display only Green by se keys keys letting Green adj Mode 4 Adjust Trapezoid as shown 4 Adjust Trapezoid as shown Press USER and then 5 Pr...

Page 47: ...ervice Only Switch on together to display Service together to display Service the Deflection PWB then Adj Mode A dj Mode press Power See Page 07 3 Choose item 151 SPIN F 3 Choose item I 01 SPIN S 261 with the remote up down with the remote up down 4 Display only Green by se keys keys letting Green adj Mode 4 Adjust Side Pin as shown 4 Adjust Side Pin as shown Press USER and then 5 Press the MENU k...

Page 48: ...tatic focus ments should have been VR fully clockwise completed Brightness 90 Contrast 6 Max Input a NTSC DOT signal Make the dot at the screen center a true circle as shown in Figure 2 using the 4 Pole magnet shown in Figure 7 Also adjust the Red and Blue CRT beam shapes ac cording to the steps 1 to 3 After the adjustment is completed return R G and B static VRs to the Best Fo cus point BEAM ALIG...

Page 49: ...r when 4 After completing optical fo 3 Deflection Yoke tilt should tightening GUS tighten the fixing have been adjusted 3 Rotate the cylinder back screws for each lens 4 Brightness 50 and forth to obtain the 5 When adjusting the Green Contrast 60 to 70 best focus point while ob Optical focus be very care serving the Cross Hatch ful Green is the most domi Adjustment procedure Observe the center of ...

Page 50: ...MAT should be FULL mode 4djustment Procedure UORMAL MODE Receive any NTSC cross hatch signal Screen Format is FULL Turn the B FOCUS VR fufly clockwise Adjust BLUE defocus ac cording to the following specifications Imm on each side equaling 2mm total See figure Blue Defocus Sticking Out i iq E nl r Center of Blue crosshatch line FOCUS PAC Blue Focus VR on FOCUS PACK PAGE 01 21 ...

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Page 52: ...bserving the boundary parts The background is set to lighter black SUB BRIGHTNESS ADJUSTMENT FOR THE DP 85 CHASSIS ALTERNATE METHOD ALTERNATE METHOD ADJUSTMENT PROCEDURE USING A GENERATOR ADJUSTMENT PREPARATION 1 Go to 12C ADJ Mode With 1 Use the input signal shown Coarse Adjustment pa wer ON press TV SA T above GRAY SCALE 1 Start adjustment 20 min and Cursor Down buttons 2 Adjust Sub Brightness u...

Page 53: ...utton to exit from the Service Menu shift due to the DM 1 mod ule This is normal See fig ure below SMOOTH Mode Adjustment 5 Press the MENU button 1 Receive any NTSC cross to exit from the Service hatch signal Menu 2 Display Format is SMOOTH WIDE mode 3 Enter the 12C Bus alignment menu and select Item 91 HPOS S 4 Adjust the data using the left and right cursor keys but DO NOT balance the Left and R...

Page 54: ...set likurn and Blue Offset 3Omn for Normal and Smooth Wide Mode Green is Geometrically centered 41 49 97 97 97 97 97 97 49 41 DIGITAL CONVEKGENCE OVERLAY FULL MODE P H3 12 182 1350 _ __ ____ It 20 66 113 4 113 4 113 4 113 4 HiSYE 113 4 113 4 113 4 113 4 66 20 V SIZE DIGITAL CONVERGENCE OVERLAY SMOOTH MODE P H312183 i 1350 26 95 119 114 107 _ 107 HiSYE 107 107 114 119 95 26 46 7 47 8 95 5 95 5 95 5...

Page 55: ...rgence correction Press USER 5 times to access the 3 X 3 Mode NOTE Old ROM data can be restored bypressing the PIP button TWICE The set will be restored to the last condition when data was stored This mode should only be needed when a complete Digital convergence adjustment is necessary 5 6 7 MUST USE OVERLAY IN THlS MODE 5 X 7 MODE 35 stopping positions DIGITAL CONVERGENCE CURSOR STOPPING POINTS ...

Page 56: ...5 51 i0 49 48 47 146 77 76 75 I 86 52 36 26 12 11 lO 25 24 35 I I 89 55 39 29 15 5 16 7 21 32 90 56 40 30 16 17 I I 18 19 20 31 I 91 57 58 59 60 61 62 63 64 65 92 93 94 95 96 97 198 99 100 101 44 71 109 43 70 108 mm I 42 69 107 41 68 106 66 102 67 105 103 104 Sometimes during adjustment S Distotiion can UCCUT This is when the line has a noticeable wavy appearance at a certain location If this is e...

Page 57: ...d INFO CALCULATION Calculates mid points 7 MENU REMOVE COLOR Removes color not being adjusted Will NOT remove GREEN entered when R A M is cleared 1 I tNF0 0 EXIT GUIDE 0 T EXIT F ENTER EXIT Enter or Exit the D C A M Must initially enter D C A M with Service Button on chassis Press 5X Toggles between External Video and Internally generated Cross hatch After exiting the DCAM set can change channels ...

Page 58: ...ROCEDURES Set SCREEN FORMAT TO FULL mode I Clear RAM data IDCU RAM Press and hold the SERV CE SW TCW No DCU Cnrrtxtkw added Select the External Center Cross Signal by pressing the EXIT button 5 times then the Remote NBUT button I PAGE 01 29 ...

Page 59: ... sekcted at top and bottom r __ 7 Extra Lines appear indicating Raster Mode r L I1 _l __ _ L Press the Remote Cursor buttons to match the selected Crosshaltch red and bilre to the green Green shnuid already be centered Press the Ret note MOVE button to exit Static Cmteaing extra lines will clisa pear PAGE 01 30 ...

Page 60: ...red Green Only Adjustment Mode when pressed 5 Remote Use the Remote 2 4 5 6 number Y buttons to move the Adjustment Selects GREEN Point location intersection of 3X3 Mode Cursor blinks at intervals of3to indicate the 3x3 Adjustment Mode blinking cursor and the Cursor I 9 Adjustment Points Buttons to adjust the lines so that the green cross hatch align with the Overlay Jig Remote Before Adjustment R...

Page 61: ...lli l e j ad 4 _ l lirl ll r Ilw After interpolation press the Remote 0 button to select the Red Convergence Adjustment Mode I blin 9 ks RED A J I Remote 1 Selects RED Press the Remote 2 456 buttons to move the adjustment point and the Cursor buttons to converge the selected color onto green Remote Has the Blue PAGE 01 32 ...

Page 62: ... Remnte Cursor and 2 4 5 6 txlttnns to perform cnnverqence point adilrstment at every other intersedon of the crosshatch 35 convergence adjlrstment Us in 7X 5 mnfle r _ t _ Press the Hemnte 1NFO hIdton to interndate noints in hetw xn the adjustment points _ _ _ _ Rematf Adillrt Colnr Up PAGE 07 33 ...

Page 63: ..._ _ _ 1 Cutsvr inks Hue L I i LA L _ _ _ 7 Press tne Herrme NHJT Press tne Herrme NHJT button button tu sekct me Hue tu sekct me Hue Colwergerw3 Adjustrmit Colwergerw3 Adjustrmit lvtode lvtode ___ _ ___ _ _ __ _ __ ii Has me Hue 7X5 Converyerlce Mode 1 1 Setects Hue for Setects Hue for Les Les adyYsrrmt nt L _ _ J PAGEOl 34 ...

Page 64: ...EN I Remote J Selects the 13X9 mode cmm 7 mm L J INPUT C S 00 Use the Remote Cursor and 2 4 5 6 buttons to perform convergence point adjustment at every other intersection of the crosshatch adjustment points in Adjust Color left Remote Adiust Color UD Adjust Color Down Adjust Color Right Press the Remote INFO button to interpolate points in between the adjustment points 0 G PAGE 01 35 ...

Page 65: ...gence 13X9 I7 Point Adjustment Red Blue Alignment Press the Remote 0 button to enter RED Adjustment Mode and to project the Red Green Crosshatch Remote VNFO Adjust Color Down Remote mmm Yes Seiects Blue for adjustment to Display all colors I 0 H PAGE 01 36 ...

Page 66: ...e If Red tiurs appear retry the process If Red dots appear the secor d tmle replace the Digital Convergence module I _ __I WARMNG Mtiakzarion most be done after a Write tt Horn YME in order for MA G C KXXS to operate If this is not done when the MAGIC FOCUS button is pressed the Static centering Mode wiH be entered Herum to the Digita Conw Adjus ament Mode and lnrtk e the Magic focus x Press the R...

Page 67: ...g sucessful Screen projects different light patterns during the Initialization Mode Press the Menu Button to return to Crosshatch Finished with Digital Convergence Setup for Normal Mode Change the screen format to SMOOTHIWIDE mode Install the Smooth Wide Overlay Press the Service Only switch to enter the DCAM Return to D and align to the Overlay i an d Rp L I _ I v jrii s j s After completing NORM...

Page 68: ... Remote Adjust Color Up Press and hold the Magic Focus button for 10 seconds until STATIC appears on Screen Center Cross will blink indicating which Color can be adjusted Adjust using the cursor keys on the Remote To select other color press the Menu Button Release Button Internal crosshatch Center Cross will blink indicating which Color can be adjusted Adjust using the cursor keys on t he Remote ...

Page 69: ... Green 0 q Red INPUT q Blue Press 0 five times to select the 7X5 Mode Press INPUT five times to select the 13X9 Mode Note 3X3 mode can not be entered without clearing ROM data Press 2 4 5 6 to move Adjustment Point Press cursor Up I Down Left Flight to Adjust Convergence When adjustment is complete STORE the New DATA by pressing the SWAP button twice After Storing initialize the MAGIC FOCUS by pre...

Page 70: ...lize Magic Focus 1 VF Error Replace DCU X X 2 Connect 1 1 Darken Outside Light 2 2 Placing of Sensor 3 is pattern hitting sensor 4 Check connection and solder bridge of sensor 5 Replace Sensor x 6 Replace Sensor PWB 7 Sensor Connector check 8 Replace DCU 9 Adjustment check H V size centering 3 2 A D Level Same as Error Code 2 X X 4 Over Flow 1 Check the piacement 2 Adjustment check H V size center...

Page 71: ...10 seconds longer Turn on TV Press front panel TV SAT but ton once for Satellite program ming Enter the HDTV channel number then press the Select or Menu button IMPORTANT Do not perform the normal Memory Initialization as in the past Service Adjustment Data will be erased All Service Adjustment Data will be lost A 10 Wait up to TWO minutes depend ing on antenna strength for chan nel programming to...

Page 72: ...on PWB 4 Check Diagnosis Red LED No means ON but No NOT Blinking tf Blinking go to Deflection PWB 1 Trun OFF Power SW 2 Turn ON again after several minutes and carefull observe ALL green LED s Deflection PWB 1 Trun OFF Power SW 2 Turn ON again after several minutes and carefull observe ALL green LED s No Did 5 green LED s Didn t Deflection PWB Did 5 green LED s PAGE 02 01 ...

Page 73: ...8 AC Clock In Signal P WB Check Q007 Power P WB D960 S901 Signal PWB Check IO01 1003 Reset IC X001 Crystal Signal P WB Check Q015 Q016 1003 Reset IC X001 Crystal Power PWB 1906 D909 No Deflection PWB Check DP02 RP05 RP06 CP05 Has Protector EP91 blown No Deflection P W 3 Check IPOl Deflection P WB Check I PO1 DP04 Replace EP91 PAGE 02 02 ...

Page 74: ...and No Power All HOT Ground All HOT Ground Check D907 Yes No Power PWB Power P WB Check R I Power P WB All HOT Ground All HOT Ground I I Power P WB Check Yes 1901 D961 Shorts on B Lines Replace E992 Power PW6 Check 1901 R912 R913 R914 PAGE 02 03 ...

Page 75: ...ower PWB Check Q913 1905 0954 D961 1904 Q915 D955 with G and K o I Check Q913 De fleciion P W5 I I Deflection PWB Deflection PWB DP22 13OV DP15 13V Check Check EP98 DPI 1 EP94 IP03 Q777 QHOl Vertical Out 1601 THOl DHll etc Q655 Q656 etc T Deflection PWB Find which LED is going Dark or OFF I DP15 28V Check EP96 DPt2 1 Other LED s are going OFF 71 a little latter Deflection P WB DP16 13V Check EP95 ...

Page 76: ...cr Bright Check DM 1 Power D943 is Dark 5VS disconnect Power Check 5VS line 1909 D942 etc Check DM 1 Power 0928 is Dark 5VS PMQ1 PMQ2 PhQ3 disconnect Check DM 1 Power D947 is Dark D 3 3VS Check Standby D 3 3VS line 1911 D946 etc Check DM 1 I Power Power D971 TV5V D930 TVSV Check D970 Check D929 1914 Q914 etc 1908 Q914 etc I I I w Power Power D920 D919 Audio R ZtV Audio F 28V Check 21V line Check 2...

Page 77: ...reference output To measure hook scope probe to convenient ground and measure signal The reference for any given signal is the same but 180 degrees out of phase Always consult the schematic for the actual pin number of the desired signal Connecting the ground clip of a grounded scope to the REF line will cause damage to components PAGE 02 06 c5m ct5rs we Q PMQi PMQ2 md PM 3 ...

Page 78: ...from PTV to DM 1 Seedrawing PMQ 2 er ower L E D blinks when AC Pwr oots up properly PMQ 3 Check communications activity between DM 1 M l turns on PTV PTV on PMS 2 Seedrawing for pin Is 1 Check signal sources 2 Apply ATSC BSS signal check for Link Locked LED inside DM 1 3 If Link LED is on Link Locked check 2H Y H V at PMZ unctional DM 1 will generate OSD with xrt a signal source attached functiona...

Page 79: ...lable during Power On and Off Check on Connector PMS2 Pin 6 IP RX Vp p 4 125 V Freq 30 77 kHz DC Varies WARNING If measuring from any PMZ Connector as Reference other than Ground make sure the Scope isn t grounded Damage to the DM 1 module will occur Reference Pin example Pin 2 4 6 8 10 12 WAVEFORMS FOR DM 1 VIDEO TROUBLESHOOTING Check on Connector PMTl Pin 1 Video NTSC 2cq 20 oy Check on Connecto...

Page 80: ...on Connector PMZ Pin 3 2H Pr 2 14 PM2 Pin 3 Measured R om Ground WARNING If measuring from any PMZ Connector as Reference other than Ground make sure the Scope isn t grounded Damage to the DM 1 module will occur Reference Pin example Pin 2 4 6 8 10 12 Check on Connector PMZ Pin 9 V Sync I 00 5 OOp r PMZ Pin 9 Measured Ram Ground i Vp p 4 406 V Frcq 59 97 Hz DC 0 03Vdc Check on Connector PMZ Pin 11...

Page 81: ...t Q777 Likewise the 28Volt 2 00 Vp p 6 605 V 10 s Freq 33 73kHz DC Voltage 265Vdc T752 Pin 11 power supply 1sproc essed the same way r 1o w 10 bd Vp p 12 34 V 4 Freq 33 78kHz DC Voltage 0OlVdc Investigate these wave forms care fully DC 22 3Vdc li Q75 1 ColIector 9 l 752 Pin I Deflection H Pulse I I I The Deflection H Pulse is 10 Freq 33 7BkHz produced from T752 pin 7 DC Voltage O DVdr This signal ...

Page 82: ...gener ated Sawtooth and outputs the signal shown in figure 15 from pin 7 The output from IH02 pin 7 is sent through the pre drivers QHO8 through QHlO and is finally delivered to the base of QHOl the High DC Voltage 3 22Vd s Voltage Horizontal output Transistor The Deflection Hori zontal Pulse produced by Q777 is utilized by the High Voltage section as it s drive signal This signal must be present ...

Page 83: ... 7 l u PDDl Connector Pin 7 H DRIVE I I generated from 1001 pin 55 high the power on driver 1 1 I Q007 is turned on A LOW is produced at it s collector 0 0 I and routed through the PQSl connector pin 3 This I I low is then routed to the PQD2 connector pin 5 to the l 0 b 4 4 5 base of QP08 turning it ON and supplying 12V to the connector PDDl pin 1and 2 This 12V then is routed P J L E l 1Drive sign...

Page 84: ...2 16 1 a l V Sync 1001 Pin 2 02 14 l Switch MosFET Drain 1901 Pin 1 02 16 l AC 50 60Hz 1001 Pin 6 L 02 14 l Switch MosFET Source 1901 Pin 2 02 16 l Y PinP UO02 1001 Pin 5 02 14 l AC Clock 1906 Pin 3 1 02 16 l I PinP UO02 Pin 6 02 14 l 3 58Mhz 1008 Pin 3 l 02 16 l Q PinP UO02 Pin 7 02 14 l Sync Out 1008 Pin 9 02 16 l 32fH VCO 1008 Pin 12 02 16 l PinP Video UO02 Pin 13 02 15 l VD Out to PinP 1008 Pi...

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Page 86: ...Q 0 c cd I 3 w PAGE 02 I 5 ...

Page 87: ...r 7 i r SMFET 1901 Pin 2 Vp p 2 328 V Freq 56 90 kHz DC 0 02 V AC Clock 1906 Pin 3 3 58Mhz 1008 Pin 3 Sync Out 1008 Pin 9 32fH VCO 1008 Pi n 12 vp p 11 0 v Freq 59 97 Hz DC 4 36 V Vp p 75 0 mV Freq 3 57 MHz Vp p 2 563 V DC 3 80 V Freq 15 75 kHz DC 2 46 V Vp p 148 4 mV Freq 504 kHz DC 5 88 V J L VD Out to PinP 1008 Pin 13 H Blk Out 1008 Pin 14 Y S Out 1008 Pin 20 Y In 1008 Pin 40 vp p 4 937 v Freq ...

Page 88: ...Zurd IOdI a nos imm A E ZI 3a ZITl 80 6S ba 3 A 59 z 3a A OL E 3a A O SLZ d dA zm SL SI WI A 8LS Z d dA ZITl SL SI b I I U d IOdI A SL8 1 d h uwa mm3 m EI 9rob 3uh A3 bPu d IOEI I InO A 3NIiLOOHSF I8 O tIL 2IOiI SlARIO6 3AVM AZIX XBHILO 4 ...

Page 89: ...IDGE RECTIFIER On Power PWB D903 23383 13 RAW 150V PROTECTOR SWITCHING REGULATOR Driver IC 13OV B CURRENT SENSING 13OV REGULATOR 13OV REGULATOR Photo Coupler FLYBACK TRANSFORMER High Voltage OVER CURRENT SENSING TRANSFORMER Deflection HORIZONTAL OUTPUT Deflection CONVERGENCE OUTPUT RH RV GV CONVERGENCE OUTPUT GH BH BV VERTICAL OUTPUT 5V REGULATOR for DCU 5V REGULATOR for SRAM DCU 13 REGULATOR HEAT...

Page 90: ...2F F901 2722359 E992 AZ00109M E994 AZ00109M E995 AZ00109M E996 AZ00108M E998 AZOOlOlM E999 AZOOlOSM S902 FJ0007 1 Q9 18 2320663M CONTROL PANEL PWB INFRARED RECEIVER ELOCITY MODULATION PWB Comeswith CRT PWB s JTOSlOl HMO1 CZO0832 JTOS091 AUDIO OUTPUT PWB JTOS341 l FRONT AUDIO OUTPUT IC 140 I 200475 1 CENTER AUDIO OUTPUT IC 1402 200475 1 l REAR AUDIO OUTPUT IC 1403 200475 1 SUBDEFLECTION PWB JTO8061...

Page 91: ...UTILIZED FOR THE DIGI TAL AND SIGNAL CIRCUITS Sub Power Supply PWB This supplies power primarily to the Digital circuits i e DM 1 module This supply runs anytime the set is plugged into an AC outlet The voltages produced are 0 33v l Power for the Satellite dish which is switched be tween 13V and 19V dependant upon the channel being received l Stand By 12V also called A12V l TV9V l TVSV l 3 3v l 5v...

Page 92: ...PAGE 04 02 ...

Page 93: ...pable of re ceiving all 18 ATSC formats l NTSC Receives the Terrestrial Signal and route it to the NTSC Tuner l The NTSC signal is routed out of this block on the line labeled Composite Video to the Signal Selec tor IC which selects the appropriate signal accord ing to the consumer s choice Either Tuner AVXl 2 or 3 and or S In 1 2 or 3 l The NTSC audio IF signal is routed to the MTS STEREO DECODER...

Page 94: ...esthe audio component from the ARM TRANSPORT or the block A Ds AUDIO which is the NTSC audio processed by the Dolby Pro Logic decoding circuit labeled as5 1 Front Left Front Right Center Rear Left and Rear Right Sub Woofer audio also called LIE Then this block processesthe signal and outputs all audio to the Audio D As AUDIO D As This block is the Digital to Analog converter which con verts the di...

Page 95: ...K DIM 1 Module Cl 3 Phone IR from Ft Panel Dimmer AD Key In Satellite From Main I r Terrestrial 1 RFOut PilSP Tuner L R Composite Video 1mQ From Main Micro Micro L R LS RS C LFE 2 14YUV YIQ 2 14 HYPBPR To 2H Video Circuit ...

Page 96: ...ation and level shift block AUDIO VIDEO SELECTOR TASSSlBN This is the selector IC Dependant upon the customer s viewing preference the DM 1 will communicate via 12C bus communications and select the NTSC signal which is sent to the demodulator The demodulator prepares the NTSC signal for the DM 1 module This IC selects the following inputs Main tuner Video One Two or Three S In One Two or Three Pi...

Page 97: ... SELECTOR BLOCK DPSX CHASSIS TERMINAL P W B Video 4 V4 S4 L R4 PinPVideo and MonoAudio SelectedL R l NTSCMain Audio Camp Video Main R L Main 4 PinP L R out To Audio Out PWB b PinPVideo to PinPunit SEUCTQR 9v TASS5 f BN 12C PAGE 04 07 ...

Page 98: ...gicon Size during Smooth Wide mode the Digital Convergence Unit hear after called DCU must know that the set is in the dis torted deflection mode This signal tells the DCU just that MAGIC SW Input when the customer pressesthe Magic Focus button on the control panel the DCU noti fies the slave micro That it is busy performing Magic Focus The slave micro Notifies the DM 1 module and This block outpu...

Page 99: ...r OFF OSD OSD BLK Output this is the on screen char acters for the Service Menu only OSD Blk is OSD blanking This cleans us the video where the OSD is to be inserted HV BLK Input this inputs are utilized by the Micro processor for Service OSD positioning HV BLK PH Output during Service Adjustment and in the NTSC normal mode This picture doesn t fill the screen The areason the side of the picture a...

Page 100: ...I J I OSDRGBYs I 1 I I I upqq oapwa33 1 I I I I I PAGE 04 10 ...

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