Mitsubishi Electric WT-42311 Service Manual Download | Manualshive

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MODEL: WT-42311 / WT-A42

Page 24

Adjustment Test Point Locations

Test Points

DT pin 3 - HV Adjust
DT pin 6 - Ground
DT pin 7 - 12 Volts
DT pin 8 - ACL
JA pin 14- Main Picture (Y)
JA pin 18 - Main Color (Cr)
JA pin 4 - Sub Picture (Y)
JA pin 8 - Sub Picture (Cr)
TP6(R, G or B) - CRT Cathode

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Summary of Contents for WT-42311

Page 1: ...EVISION VK20 CHASSIS SPECIFICATIONS Power AC 120V 60Hz 240W Frequency VHF 54 470MHz Range UHF 470 806MHz Antenna Input VHF UHF 75Ω unbalanced CRT Size 7 inches High Voltage 32 0kV at 0A Cabinet 39 W x34 H x25 D Dimensions Weight 105 lbs Speaker Two 5 round full range 8Ω 5W Input Level VIDEO IN JACK RCA Type 1 0Vp p 75Ω unbalanced AUDIO IN JACK RCA Type 4 7dBm 43kΩ unbalanced S VIDEO IN JACK Y C se...

Page 2: ...m a r i k 0 8 ...

Page 3: ...Equipment 15 Initial Setup 16 LED Indicator Diagnostics 17 Circuit Adjustment Mode 18 Convergence Adjustment Mode 19 Adjustment Items List 21 Adjustment Test Points 24 Adjustment Procedures High Voltage Regulation 25 Main Sub Y Level 25 Main Sub Color Level 26 CRTCutoff 26 White Balance NTSC 27 White Balance HD 27 Black Level 28 Sub Contrast 28 Dynamic Focus Preset 29 Lens Focus 29 Electrostatic F...

Page 4: ...ower Supply 52 Video Color Signal Path 53 Sync Signal Path 54 Deflection HV 55 X Ray Protect 56 HV Regulation 57 Sound Signal Path 58 Convergence 59 Control Circuitry 60 Section 2 Schematic Diagrams SCHEMATIC DIAGRAMS Overall Block Diagram 1 PCB MAIN 2 PCB POWER 3 PCB TERMINAL Input Sw 4 PCB TERMINAL 3DYC Decoders 5 PCB SIGNAL 1 AV I O 6 PCB SIGNAL 2 Micro 7 PCB SIGNAL 3 VCJ 8 PCB SIGNAL 4 Converg...

Page 5: ...hematic and block diagrams of the above listed models are included in this service manual for better under standing of the circuitry PCB drawings are also included for easy location of parts and test points PRODUCT SAFETY NOTICE Many electrical and mechanical parts in television receivers have special safety related characteristics These characteristics are often not evident from visual inspection...

Page 6: ...Radiation High voltage must be set as prescribed under the section titled Electrical Adjustments Leakage current check Before returning the receiver to the customer it is recommended that leakage current be measured according to the following methods 1 Cold Check With the alternating current AC plug removed from the AC source place a jumper across the two AC plug prongs Connect one lead of an ohm ...

Page 7: ...mbers CABINET DISASSEMBLY FRONT VIEW Front Cabinet Disassembly 1 Remove the Speaker Grille by pulling forward 2 Remove the Board Front by removing 3 screws a 3 Remove 3 screws b and then remove the Front Mask and Diamond Shield 4 Remove 8 screws c and then the Assembly Screen ...

Page 8: ... WT A42 CABINET DISASSEMBLY REAR VIEW Rear Cabinet Disassembly 1 Remove the Back Board by removing screws 7 a 2 Remove 6 screws b securing the Light Box Assembly 3 Disconnect connector EJ 4 Slide the Light Box Assembly out of the cabinet ...

Page 9: ...ens from the Assembly Screen as shown below Note When separating the Lenticular Screen from the Fresnel Lens use caution while prying the Screen and Lens apart Use a slot type screw drive and remove the pressure sensitive double sided tape 2 Installation of the Lenticular Screen and Fresnel Lens Note Store the Lenticular Screen and Fresnel Lens in a cool dry place High humidity may deform the Lent...

Page 10: ... to access the Main Chassis 1 Remove the Light Box Assembly refer to the Cabinet Rear Disassembly 2 The shelf in the front of the Light Box Assembly is removable refer to Figure 1 3 Release the shelf lock Apply pressure to the shelf lip on the right side downward and towards the front Refer to Figure 2 4 Hold both sides of the shelf pull forward and then upward to remove the shelf ...

Page 11: ...m a r i k 0 8 MODEL WT 42311 WT A42 Page 11 PCB Locations Major Parts Locations ...

Page 12: ...Assembly 2 Remove the three Anode Lead Wires from the Flyback transformer and discharge the CRTs Use the above procedure 3 Unplug the three PCB CRTs 4 Remove 4 screws a retaining the Optical Unit Figure 1 5 Remove 4 screws b retaining the Lens of the respective CRT 6 Lift the Optical Unit from the Light Box and set it lens down on a flat surface 7 Remove 4 screws c retaining the CRT Figure 2 Note ...

Page 13: ...tween the CRT and the CRT Spacer causing leakage of the CRT Coolant 2 Installation of the CRT Note The replacement CRT is supplied as an assembly comprised of the CRT and the Inner Lens with the space between them filled with ethylene glycol Care should be taken during handling and installation to prevent shock from disrupting the seal or alignment between the CRT and Inner Lens Figure 4 Figure 3 ...

Page 14: ...e Lens Adjustment Set Screw faces the rear of the TV Figure 5 b Install the Lens mounting screws b Figure 1 4 Insert the Optical Unit into the Light Box Assemblyand secure it with 4 screws a Figure 1 5 Plug in the PCB CRTs 6 Insert the Anode Lead Wires into the Flyback Transformer 7 Re clamp the Lead Wire in its original position Figure 5 Adjustment procedures after replacing the CRT s CRT Cut Off...

Page 15: ...ess otherwise specified use 10 1 probes Signal Generator both SD and HD capable Frequency Counter Direct Current Voltmeter Direct Current Power Supply Multiplex Audio Signal Generator Direct Current Ampere Meter 2 Test Signal A Monoscope Signal Note If you do not have a monoscope signal source connect the unit to a VCR and play a Monoscope alignment tape Part Number 859C568060 B Color Bar Signal U...

Page 16: ... Time Applies Unlock Time N A TV Balance 50 Clock Time N A TV Surround Off Set Day N A Video Mute On TV Listen To Stereo Black Enhancement On TV Level Sound Off Closed Captions On if Mute Auto Color Correction Onn VIDEO SETTINGS CC Background Gray TV Contrast 1 Timer Off TV Brightness 50 Antenna ANT A Set Time 12 00PM TV Sharpness 50 Channel 3 Set Day Everyday TV Color 50 Memory Deleted Device Ant...

Page 17: ...icates the value of the MSD tens digit of the Error Code The flashing then pauses for approximately 1 2 second The LED then flashes indicating the value of the LSD ones digit of the Error Code The Error Code is repeated a total of 5 times Example If the Error Code is 24 the LED will flash two times pause and then flash four times C Error Codes The Error Code designations indicating a malfunction o...

Page 18: ...llowing pages for the listing of adjustment functions and adjustment items 1 Press the AUDIO button on a remote hand unit to select an adjustment function Each time the button is pressed the Function changes in the following sequence 2 Press the VIDEO button to select a specific Adjustment Item The Item number increases each time the VIDEO button is pressed C Changing Data After selecting an adjus...

Page 19: ... SD mode is activated If the signal source is HD 1080i the HD mode is activated 3 Activating the HD mode when no HD signal is available Activate the Factory Option Menu MENU 2 2 7 0 Use the Adjust keys to select DTV Port and press Enter to change the setting to 1080i Sequence Auto 480i 480 p 1080i Ignore any loss of sync while changing modes Exit the Option Menu Press MENU twice Select the DTV Inp...

Page 20: ... button to select a Sub Function 2 Use the VIDEO button to select an Adjustment Item 3 Use the ADJUST buttons to change data F FINE CONV Press 4 Sub Functions This mode is used to perform Fine Raster Correction and Fine Red and Blue Convergence Adjustments There are three Sub Adjustment Functions selected with the AUDIO button FINE GREEN a Green Crosshatch is displayed for Fine Raster Corrections ...

Page 21: ...on Menu 2 2 5 7 Item Abbrev Description Range 480i 480p 1080i Adjustment 1 SCT Picture Gain control 0 63 31 31 31 Sub Contrast 2 SBRT Sub Brightness 0 63 31 31 31 Black Level 3 SCON Sub Contrast 0 15 0 0 0 Preset 4 RDRH R Drive H temp 0 63 31 31 31 White Balance 5 GDRH G Drive H temp 0 63 41 41 41 Preset 6 BDRH B Drive H temp 0 63 31 31 31 White Balance 7 CTRH R Cutoff H temp 0 63 31 31 31 8 CTGH ...

Page 22: ...0 150 2 VCNT V saw amplitude 0 127 29 29 3 VSTR V saw start timee 0 127 0 10 4 VOFS V saw offset 0 127 10 8 5 STLN Start line 0 127 38 26 6 FPHS Fine phase 0 352 310 296 7 CPHS Coarse phase 0 31 15 15 8 HOFS H saw offset 0 127 22 22 9 DPHS DF coarse horiz phase 0 31 1 1 10 DOFS DF offset 0 127 33 15 11 TPHS Test Pattern phase 0 352 45 38 12 TPVD Test Pattern Vert Position 0 127 22 39 13 ODEV Odd E...

Page 23: ... 12 VLIN Vert Linearity 18 18 COARSE CONV RED MENU 2 2 5 9 5 Abbrev Description SD HD 1 HSTA Horiz Position 50 50 2 VSTA Vert Position 0 0 3 SKEW Skew Y axis 0 0 4 TILT Tilt X axis 0 0 5 HLIN Horiz Linearity 300 250 6 HWID Width 20 0 7 VKEY Vert Keystone 155 190 8 VWID Height 0 0 9 VLIN Vert Linearity 0 0 10 TBPC Top Bottom PC 70 100 11 SDBW Side Bow 30 30 COARSE CONV BLUE MENU 2 2 5 9 5 Abbrev De...

Page 24: ...Page 24 Adjustment Test Point Locations Test Points DT pin 3 HV Adjust DT pin 6 Ground DT pin 7 12 Volts DT pin 8 ACL JA pin 14 Main Picture Y JA pin 18 Main Color Cr JA pin 4 Sub Picture Y JA pin 8 Sub Picture Cr TP6 R G or B CRT Cathode ...

Page 25: ...ET are activated HV Circuit 1 HV Regulation Oscilloscope JA Connector pin 14 JA Connector pin 4 Color Bars Video Input Video Circuit 2 Main Sub Y Level To set picture luminance Excess or insufficient brightness 1 Supply a color bar signal to a Video Input not an RF input 2 Select the color bar signal for both the main and sub pictures 3 Connect the oscilloscope to connector JA pin 14 Main Y 4 Acti...

Page 26: ...ix Function 9 Adjust so Sub PR Main PR 3 Main Sub Color Level CIRCUIT ADJUST MODE Activate MENU 2 2 5 7 Function AUDIO Item No VIDEO Adjust Data ADJUST Save Data ENTER Exit MENU twice To set the cutoff point for all three CRTs Monochrome has a color tint or incorrect brightness CRT Circuit 4 CRT Cutoff Oscilloscope TP6R TP6G TP6B 50V Div 2msec Div None Video Input Note Use the Expand mode full scr...

Page 27: ... Adjust Item 13 CTRL and 15 CTBL for optimum white 11 Set the data for Item 19 COL back to 31 CIRCUIT ADJUST MODE Activate MENU 2 2 5 7 Function AUDIO Item No VIDEO Adjust Data ADJUST Save Data ENTER Exit MENU twice To set the CRTs white level in the HD mode Monchrome pictures have a color tint CRT Circuit 6 White Balance HD HD White Raster DTV Inputs 1 Supply an HD Full White Raster signal to the...

Page 28: ...e Service Mode 40 30 20 10 50 0 0 0 60 70 80 90 GRADATION SCALE DC ma meter DT connector pins 7 8 Grayscale RF Input To set overall beam current to its optimum level Excess or insufficient contrast Note Activate the Expand mode full screen 1 Supply a Grayscale signal to a RF Input 2 Activate the Adjust Mode Video Chroma Function 3 Select Item 1 SCT signal level automatically reduces 4 Connect a 3m...

Page 29: ...stment must be done before Electrostatic Focus Perform this adjustment for RED GREEN and BLUE monochrome pictures 1 Supply a VIDEO signal Monoscope 2 Cover the Red and Blue Lens producing a green raster 3 Adjust the Green Lens for best focus at the center of the Monoscope pattern Note Attach a white paper to the screen center During adjustment observe the picture on the screen from inside for easi...

Page 30: ...put button 3 Activate the Service Mode HR Function 4 Use the Adjust Right Left buttons to center the display horizontally A B 5 Save data and exit the Service Mode Monscope Crosshatch Video Input CRT Circuit 11 Electrostatic Focus To set electrostatic focus to the optimum point Poor focus Note This adjustment must be performed after the Sub Contrast adjustment Static Focus Adjustment 1 Supply a Mo...

Page 31: ...NTSC HD DEFL JUNGLE MENU 2 2 5 7 Abbrev HD NTSC 1 HWID 31 31 2 HKEY 31 31 3 EWPT 31 31 7 VHGT 28 40 8 VLIN 5 5 9 VSCN 0 0 18 VPOS 31 31 COARSE CONV GREEN MENU 2 2 5 9 5 Abbrev SD HD 1 HSTA 0 0 2 VSTA 0 0 3 SKEW 0 0 4 TILT 0 0 5 HWID 50 50 6 HLIN 0 0 7 SPCC 20 0 8 HKEY 0 0 9 TBPC 180 140 10 VKEY 0 0 11 VWID 11 20 12 VLIN 18 18 COARSE CONV RED MENU 2 2 5 9 5 Abbrev SD HD 1 HSTA 50 50 2 VSTA 0 0 3 SK...

Page 32: ...the signal source 3 Activate the Adjustment Mode JNGL Function 4 Select and adjust each of the following items 7 VHGT so the vertical marker sum 4 1 HWD so the horizontal marker sum 7 5 Save data and Exit the Service Mode HD Mode 1 Supply an HD Monoscope signal to the DTV HD Inputs 2 Select the DTV Inputs as the signal source Input button 3 Activate the Service Mode Defl Jungle Function 4 Select a...

Page 33: ...a Cursor is displayed on the crosshatch 5 Use the Cursor to adjust for straight crosshatch lines 6 Exit the Convergence Mode HD mode 1 Supply horizontal and vertical HD sync to the DTV Inputs and select the DTV Inputs as the source Note If an HD signal is not available use the Conv HD with No Signal Procedure 2 Enter the Convergence Mode Coarse Green 3 Repeat NTSC Steps 3 through 6 in the HD mode ...

Page 34: ...d mode use the Red Centering Magnet to converge red on the green at the center of screen Correct any red tilt with the Red Deflection Yoke 7 In the Coarse Blue mode repeat Step 6 using the Blue Centering magnet and the Blue Deflection Yoke 8 Exit the Convergence mode SD mode 1 Supply an NTSC Monoscope signal to a Video Input 2 Select the Monoscope as the signal source Input button 3 Enter the Conv...

Page 35: ...green Note If center convergence shifts use red and blue Items 1 HSTA and 2 VSTA to correct the shift 6 Exit the Convergence Mode HD mode 1 Supply horizontal and vertical HD sync to the DTV Inputs and select the DTV Inputs as the source Note If an HD signal is not available use the Conv HD with No Signal Procedure 2 Repeat SD Steps 2 through 5 in the HD mode 3 Exit the Convergence mode Convergence...

Page 36: ... 6 Exit the Convergence mode HD Fine Adjustment 1 Supply an HD signal sync only to the DTV inputs and select DTV with the Audio button Note If an HD signal is not available use the Conv HD with No Signal Procedure 2 Repeat SD Fine Adjustment Steps 2 through 6 in the HD mode Convergence Circuit 18 Fine Convergence NTSC None HD HD sync Video DTV Inputs CONVERGENCE MODE Activate MENU 2 2 5 9 Misc 6 C...

Page 37: ...e seconds to new chip parts 5 Avoid using a rubbing stroke when soldering 6 Take care not to scratch or damage the chip parts when soldering 7 Supplementary cementing is not required Chip Parts Removal Resistors Capacitors etc 1 Grasp the part with tweezers Melt the solder at both sides alternately and remove one side of the part with a twisting motion 2 Melt the solder at the other side and remov...

Page 38: ...or tolerance characteristics of electrical components REPLACEMENT PARTS MARK B C D F G J K Tolerance 0 1 0 25 0 5 1 2 5 10 MARK M N V X Z P Q Tolerance 20 30 10 40 20 80 20 100 0 30 10 MARK M N V X Z Tolerance pF 0 1 0 25 0 5 1 2 Replacement Part Notes When Replacing the RF Switch RF SW or the PCB SIGNAL 1 Remove the PLATE RF SW from the original component shown in the diagram at the right 2 Insta...

Page 39: ...334P281010 TRANS FLYBACK 129P059050 VR FOCUS 330P288010 DEFL YOKE 453B036010 CAP ANOD SHORT RED 453B036040 CAP ANODE GREEN 453B036050 CAP ANOD BLUE 453B036060 CAP ANODE RED PART NO DESCRIPTION 251C219010 ASSY CRT RED 251C219020 ASSY CRT GREEN 251C219030 ASSY CRT BLUE CRT ASSEMBLIES MODEL MIRROR LENTICULAR SCREEN FRESNEL LENS DIAMOND SHIELD WT 42311 494D006010 491P136010 491P137010 760D628070 WT A4...

Page 40: ...2D CONVERTER IC7D10 275P769010 IC C MOS TC74AC157FT IC7D11 275P769010 IC C MOS TC74AC157FT IC7E00 275P434010 IC C MOS TC74HC4066AFT IC7E01 275P560010 IC ADS931E A2D CONVERTER IC7E02 275P560010 IC ADS931E A2D CONVERTER IC7E03 275P560010 IC ADS931E A2D CONVERTER IC7E10 275P769010 IC C MOS TC74AC157FT IC7E11 275P769010 IC C MOS TC74AC157FT IC7G01 275P247010 IC C MOS MB40C958VPFV IC7H00 275P799010 IC ...

Page 41: ...35 264P045040 DIODE 1S24710M D5A36 264P045040 DIODE 1S24710M D5A37 264P521040 DIODE EU1A D5A51 262P039010 DIODE BYW96E 20 D5A52 264P899010 DIODE BYV26E D5A53 264P489010 DIODE RD16FB1 D5A54 264P622010 DIODE AL01Z D5A55 264P622010 DIODE AL01Z D5A56 264P045040 DIODE 1S24710M D5A57 264P521040 DIODE EU1A D5A58 264P045040 DIODE 1S24710M D5A60 264P488030 DIODE RD13FB2 D5A61 264P487090 DIODE RD12FB3 D5H01...

Page 42: ...1S L6K05 409P777080 EMI F CHIP BLM21P221S L6K06 409P777080 EMI F CHIP BLM21P221S L6K07 409P777080 EMI F CHIP BLM21P221S L6K08 409P777080 EMI F CHIP BLM21P221S L6K09 409P777080 EMI F CHIP BLM21P221S L6L20 409P777080 EMI F CHIP BLM21P221S L6L21 409P777080 EMI F CHIP BLM21P221S L6L22 409P777080 EMI F CHIP BLM21P221S L6L23 409P777080 EMI F CHIP BLM21P221S L6M00 409P777080 EMI F CHIP BLM21P221S L6M01 3...

Page 43: ...02 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6K03 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6K04 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6K05 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6M00 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6M01 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6M02 409P876020 EMI F CHIP CNF20C470S CKD510JB1H470S LC6M03 409P876020 E...

Page 44: ...E11 109D151010 R CARBON 1 4W 2 2 J R3E12 109D151010 R CARBON 1 4W 2 2 J R3E14 109D151010 R CARBON 1 4W 2 2 J R4B03 103P713090 R CARBON 1 4W 15K J R4B05 103P714030 R CARBON 1 4W 33K J R4B10 103C188040 R METAL 2W 2 2 J R4B12 103C188040 R METAL 2W 2 2 J R4B16 109P095010 R METAL LIN 1 4W 5 1K J R4B17 103P711090 R CARBON 1 4W 330 J R4B20 103P711090 R CARBON 1 4W 330 J R4B23 103P411070 R CARBON 1 4W 220...

Page 45: ...20 R CARBON 1 4W 560 J R5H14 103P710090 R CARBON 1 4W 47 J R5H15 103P710090 R CARBON 1 4W 47 J R5H16 103P710020 R CARBON 1 4W 12 J R5H17 103P710020 R CARBON 1 4W 12 J R5H19 103P713070 R CARBON 1 4W 10K J R5H20 103P713070 R CARBON 1 4W 10K J R5H21 103P713030 R CARBON 1 4W 4 7K J R5H44 103P711030 R CARBON 1 4W 100 J R5H47 103C172010 R METAL 1W470 J R5H48 103P712060 R CARBON 1 4W 1 2K J R5H49 103P714...

Page 46: ...K J R9A13 103P713000 R CARBON 1 4W 2 7K J R9A20 103C181020 R METAL 2W 82 J R9A21 103P712050 R CARBON 1 4W 1K J R9A23 103P710090 R CARBON 1 4W 47 J R9A24 103P142070 R CARBON 1 2W 1 5K J R9A29 103P713070 R CARBON 1 4W 10K J R9A51 103P715050 R CARBON 1 4W 330K J R9A52 103P710090 R CARBON 1 4W 47 J R9A53 103P712030 R CARBON 1 4W 680 J R9A54 102P107000 R WIRE 2W 0 15 K R9A55 102P106090 R WIRE 2W 0 12 K...

Page 47: ... M C2N00 181P355000 C ELEC 50V0 47M M C2N01 181P355000 C ELEC 50V0 47M M C2N02 181P355000 C ELEC 50V0 47M M C2N05 181P355000 C ELEC 50V0 47M M C2N06 181P355000 C ELEC 50V0 47M M C2N07 181P355000 C ELEC 50V0 47M M C2N17 181P355000 C ELEC 50V0 47M M C2N18 181P355000 C ELEC 50V0 47M M C2N19 181P355000 C ELEC 50V0 47M M C2N22 181P350060 C ELEC 6 3V1000M M C2N28 181P350060 C ELEC 6 3V1000M M C2N29 181P...

Page 48: ...C5A45 181P183040 C ELEC 25V470M M105C C5A51 154P260010 C CER R1KV 220P K C5A52 172P580090 C M PLA PP 1800V2200P J C5A55 172P088060 C PLAST PP 630V6800P J C5A56 181P355080 C ELEC 50V47M M C5A57 172P262070 C M POLY 50V0 15M J C5A60 172P262050 C M POLY 50V0 1M J C5A61 181P355040 C ELEC 50V 4 7M M C5A64 181P352010 C ELEC 16V22M M C5A65 181P355050 C ELEC 50V10M M C5A68 181P123070 C ELEC NP 50V0 47M M C...

Page 49: ...VAC0 01M M C9A14 189P152070 C M POLY 250VAC0 01M M C9A15 172P262050 C M POLY 50V 0 1M J C9A16 189P185070 C CER 250VAC1000P M C9A17 189P185070 C CER 250VAC1000P M C9A27 154P270050 C CER SL1KV 22P J C9A28 172P262050 C M POLY 50V 0 1M J C9A29 142P010090 C CER B500V 470P K C9A34 181P352040 C ELEC 16V100M M C9A39 181P355000 C ELEC 50V0 47M M C9A50 142P020050 C CER B50V 470P K C9A52 154P400070 C CER B1K...

Page 50: ... 440C412010 PIN JACK BOARD 3P TU1A01 295P516010 TUNER TV 115 V F045AP TU1B01 295P516020 TUNER TV 115 V F025AP X2L00 285P426010 QUARTZ CRYST 3 579 MHZ X2LA0 285P426010 QUARTZ CRYST 3 579 MHZ X2M30 285P426040 QUARTZ CRYST 20 000 MHZ X2N00 285P426020 QUARTZ CRYST 4 000 MHZ X2S00 285P426020 QUARTZ CRYST 4 000 MHZ X3A01 285P413010 QUARTZ CRYST 18 43 MHZ X7A13 285P426030 QUARTZ CRYST 10 000 MHZ X7H00 28...

Page 51: ... A42 2 WT 42311 SCREENASSEMBLYPARTS 4 750A434010 FRONT MASK 1 491P136010 SCREEN LENTICULAR LENTI 4 2 491P137010 LENS FRESNEL FRESNEL 42W 6 596C569010 BRACKET SCREENCORNER 8 598D300010 BRACKET SCREENSIDE 5 641B942010 HOLDER SCREEN T 7 641B943010 HOLDER SCREEN S 3 760D628070 DIAMOND SHIELD 42 2 3 760D639050 DIAMOND SHIELD 42 1 ...

Page 52: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 52 POWER SUPPLY ...

Page 53: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 53 VIDEO COLOR ...

Page 54: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 54 SYNC SIGNAL PATH ...

Page 55: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 55 DEFLECTION HV ...

Page 56: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 56 HV REGULATION ...

Page 57: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 57 X RAY PROTECT ...

Page 58: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 58 SOUND SIGNAL PATH ...

Page 59: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 59 CONVERGENCE ...

Page 60: ...m a r i k 0 8 MODELS WT 42311 WT A42 Page 60 CONTROL CIRCUITRY ...

Page 61: ...AMS CONTENTS Page Schematic Diagrams Overall PCB Block Diagram 1 PCB MAIN 2 PCB POWER 3 PCB TERMINAL Input Switch 4 PCB TERMINAL 3DYC Decoders 5 PCB SIGNAL 1 AV I O 6 PCB SIGNAL 2 MICRO 7 PCB SIGNAL 3 VCJ 8 PCB SIGNAL 4 Convergence Generator 9 PCBs CONTROL CRTs DBF PREAMP SVM UNI 10 PCB DOUBLER 1 Input 11 PCB DOUBLER 2 Main 12 PCB DOUBLER 3 Output 13 CAUTION Before servicing this chassis it is imp...

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