Sharp 21ES251E Скачать руководство пользователя | Manualshive

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WARNING

The chassis in this receiver is partially hot.  Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis.  To prevent electric shock, do not remove cover.  No user - serviceable parts
inside.  Refer servicing to qualified service personnel.

SERVICE MANUAL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored

to its original condition and only parts identical to those specified should be used.

MODEL :

COLOUR TELEVISION

Chassis No. GA-8S

FEATURES

Multi 21 System, 100-CH Program Memory

Full Auto Search System
NTSC Colour Comb Filter

Blueback Function Noise Mute

NTSC Colour Comb Filter Function

High Contrast Picture (Black Strecth Circuit)

CATV (Hyperband) Ready

White Temperature Select

Surround Sound Effect

OFF Timer & Child Lock
Hotel Mode & AV Mode (Movie/Music/News)

English Language OSD

SHARP CORPORATION

Page

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SPECIFICATIONS ............................................. 2

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IMPORTANT SERVICE NOTES ........................ 2

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ADJUSTMENT PRECAUTIONS ........................ 3

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TROUBLE SHOOTING TABLE ....................... 16

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WAVEFORMS .................................................. 18

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SOLID STATE DEVICE BASE DIAGRAM ....... 19

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DESCRIPTION OF SCHEMATIC DIAGRAM.. 20

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DIAGRAM:

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DIAGRAM BLOCK CRT

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DIAGRAM SCHEMATIC CRT

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Page

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MAIN BLOCK ........................................... 23

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MAIN SCHEMATIC ................................... 24

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REPLACEMENT PARTS LIST

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21ES251E
21ES253E
21ES353E

Rear AV-IN Terminal

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Save Mode

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CONTENTS

Rear AV-OUT Terminal

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AV Stereo & Equalizer

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Содержание 21ES251E

Страница 1: ...21 System 100 CH Program Memory Full Auto Search System NTSC Colour Comb Filter Blueback Function Noise Mute NTSC Colour Comb Filter Function High Contrast Picture Black Strecth Circuit CATV Hyperband Ready White Temperature Select Surround Sound Effect OFF Timer Child Lock Hotel Mode AV Mode Movie Music News English Language OSD SHARP CORPORATION Page SPECIFICATIONS 2 IMPORTANT SERVICE NOTES 2 AD...

Страница 2: ...t of the repairs never forget to check for such high voltage after the work 3 Do not substitute a picture tube with unauthorizerd types and or brands which may cause excess X ray radiation BEFORE RETURNING THE RECEIVER Before returning the receiver to the user perform the following safety Checks 1 Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged betw...

Страница 3: ...ster appeared on the screen Initial values are automatically preset only when then follow by AC ON Initial values are automatically preset only when a new EEPROM is used Judge with the first 4 bytes 2 The initial data are preset as listed in page 6 10 3 Make sure the data need modification or not Initial data Precaution If haven t done this initialization it may possibly generate excessive Beam cu...

Страница 4: ...ALANCE LEFT SUB COL V05 0D SHARPNESS UP SUB BRIGHT V06 36 BALANCE RIGHT SUB TINT V07 46 TREBLE UP SUB SHP PRE V08 C6 TREBLE DOWN SUB COL YUV V09 26 BASS UP SUB TINT YUV V10 24 COLOUR UP V SIZE V11 V SIZE60 V16 54 BRIGHTNESS DOWN V SHIFT V12 V SHIFT60 V17 74 TINT DOWN H SHIFT V13 H SHIFT60 V18 66 SURROUND UP SCM BR V14 E6 SURROUND DOWN SCM BB V15 C4 CONTRAST DOWN SUB VOL 4C PICTURE S TRAP BG V19 CC...

Страница 5: ... O35 Option Mode SETTING DATA 21DXS200 V00 0 127 63 63 ADJ V00 0 127 63 63 ADJ V00 0 255 127 127 ADJ V00 0 255 127 127 ADJ V00 0 255 127 127 ADJ V01 0 127 50 50 AUTO V02 0 63 31 31 AUTO V03 0 7 3 3 AUTO V04 0 127 100 100 ADJ V05 0 127 63 63 ADJ V06 0 255 127 127 ADJ V07 0 127 63 63 ADJ V08 0 63 37 28 FIX V09 0 127 49 49 FIX V10 0 127 61 61 FIX V11 0 63 38 38 ADJ V12 0 7 3 3 ADJ V13 0 31 9 9 ADJ V1...

Страница 6: ... P YDL S YDL N4 ABCL Gain VIF G YDL YDL N3 YDL AV YDL AV P YDL AV S YDL AV N4 YDL AV N3 YDL YUV COL AV COL P COL S COL N4 COL N3 FIX ADJ AUTO Setting Mode Second Stage EEPROM ITEMS OSD DATA LENGTH INITIAL DATA F47 0 disable 1 enable 0 0 FIX F48 0 7 1 1 FIX F49 0 7 2 2 FIX F50 0 7 3 3 FIX F51 0 3 3 3 FIX F52 0 3 3 3 FIX F53 0 3 3 3 FIX F54 0 3 0 0 FIX F55 0 3 0 0 FIX F56 0 3 1 1 FIX F57 0 3 0 0 FIX...

Страница 7: ...F BPF WIDE 574 CONT MUSIC AS SPEED DOWN UP MATRIX ADJ AV2 Brightness OFFSET WAIT MD TIME Contrast OFFSET MID3 OFFSET Bright OFFSET CR PEDESTEL ADJ TREBLE OFFSET R DRI YUV OFFSET B DRI YUV OFFSET R CUT YUV OFFSET G CUT YUV OFFSET B CUT YUV OFFSET BRT YUV OFFSET SHP ANT ONII OFFSET CON YUV OFFSET F134 10 0 10 1 0 FIX F135 10 0 10 1 4 FIX F136 10 0 10 1 4 FIX F137 10 0 10 1 0 FIX F138 10 0 10 0 1 FIX...

Страница 8: ... default for 0 Picture and Sound 1 Picture only 0 1 0 0 O25 AV MODE Dis Ena 0 1 1 1 O26 MP IN Dis Ena 0 1 1 0 O27 VIRGIN MODE Dis Ena 0 1 0 0 O28 WHITE TEMP 0 3 modes 1 5 modes 0 1 0 0 O29 LK MENU Dis Ena 0 1 0 0 O30 ARROW KEY 0 CH VOL 1 º 0 1 1 1 O31 VOL TABLE 0 7 bit volume table 1 8 bit volume table 0 1 0 0 O32 GLARE SAVE MODE 0 No GLARE SAVE MODE 1 GLARE MODE 2 SAVE MODE 0 2 1 2 O33 LANGUAGE P...

Страница 9: ...ode TV SET Bias Box about 4 5V Note 1 Fig 3 1 3 Call V01 mode in service mode Adjust the V01 bus data to obtain the Tuner output pin drop 0 1 1 0V below maximum voltage 21DXS200 63 67dBµV 4 Change the antenna input signal to Note 1 and make sure there is no noise 5 Turn up the input signal to 90 95 dBµV to be sure that there is no cross modulation beat FOCUS ADJUSTMENT NO ADJUSTMENT POINT ADJUSTME...

Страница 10: ...JUSTMENT POINT ADJUSTMENT CONDITION PROCEDURE WAVEFORM OR OTHERS 1 V SHIFT 1 Receive Monoscope Pattern Signal PAL 50 Hz Figure A B I2C BUS CONTROL 2 Choose the service data V12 3 Adjust V12 to align the center of the screen to the geometric center of CRT Note B line Monoscope middle line must same or nearest higher position to the A mark Tube middle mark refer to the attach drawing OK OK NG 2 V SI...

Страница 11: ...ne isstraight 11 ANGLE ADJ 1 Receive CrossHatchPatternSignal PAL50 Hz I2CBUS CONTROL 2 Choose the service data V42 3 Adjust the 2nd vertical line fromthe end ofthe crosshatchpatternline isstraight 4 Make sure bothleft right of2nd vertical line at optimumpoint 12 TRAPEZIUM 1 Receive CrossHatchPatternSignal PAL50 Hz I2CBUS CONTROL 2 Choose the service data V34 3 Adjust the 2nd vertical line fromthe ...

Страница 12: ...ch Adj V04 until LUMINANCE Y become 150 cd m2 White Dark In service mode V00 adj the R D B D until the axis of color temperature become White 12300 K X 0 272 Y 0 275 5 5 IRE 9 5 IRE 2 DARK WHITE LOW BEAM In Window Pattern Signal Let the gun point at Dark White position if the color temperature data shift away from Note Signal using W B Pattern Generator the data adjusted in step 1 adjust R C G C B...

Страница 13: ...ASHBACK key 4 Call the V07 data in service mode Adjust the V07 bus data to obtain the waveform shown as Figure 1 1 5 Disable Y Mute by pressing key Hex E4 or FLASHBACK then clear the SERVICE mode NOTE Please make sure waveform is adjusted until getting good step slope which is can be a straight line slope at the top of waveform step W Y Cy G Mg R B Fig 1 1 SECAM CHROMA ADJUSTMENT NO ADJUSTMENT POI...

Страница 14: ...utput to 500mW by volume key 3 Terminate the Sub Woofer output with a 22 k W impedance make sure that the output is 4 0 Vp p 3 dB ADJUSTMENT CONDITION PROCEDURE ADJUSTMENT CONDITION PROCEDURE FUNCTION OPERATION CHECKING VIDEO AUDIO 1 NO ADJUSTMENT POINT WAVEFORM OR OTHERS 1 CONTRAST Key 1 Receive Monoscope Pattern signal 2 Set MENU then go into PICTURE mode to select CONTRAST 3 Press Volume Up Dow...

Страница 15: ...properly Then select the N358 mode Check again its colour so that it is working properly 13 SOUND SYSTEM 1 Receive PAL D K signal press MENU choose CH SETTING then go into SOUND mode to select B G I Check the sound output is not working properly Select D K and check the sound output to make sure it is working properly 2 Receive PAL I signal press MENU choose CH SETTING then go into SOUND mode to s...

Страница 16: ...URE NO SOUND Does noise or signal appear at pin 30 of IC801 Check the tuner AGC at JA402 Check IC801 and related circuit Check pin 1 of SF201 Tuner and related circuit Check pin 46 at IC801 and related circuit Check pin 47 of IC801 Tuner and related circuit CIRCUITS TO BE CHECKED Tuner PIF Automatic Gain Control 5V 32V Power Source Does noise or signal appear at pin 48 and 49 of IC801 Does noise o...

Страница 17: ...515 R513 C515 and R514 R520 Check C511 NO SPECIFIC COLOUR Is some colour produced in B W broadcast reception Is the white balance properly adjusted Re adjust the white balance The picture colour is yellow The picture colour is magenta The picture colour is cyan Check Q855 and its adjacent circuits Check Q844 and its adjacent circuits Check Q853 and its adjacent circuits Check IC801 Check IC1001 an...

Страница 18: ...ate 6 4 66 Vp p 7 5 60 Vp p Horiz Rate 8 1 57 Vp p Vert Rate 9 2 60 Vp p Horiz Rate 10 20 80 Vp p Horiz Rate 11 1110 Vp p Horiz Rate 12 63 40 Vp p Vert Rate 13 7 52 Vp p Vert Rate 14 147 00 Vp p Horiz Rate 15 542 00 Vp p 16 118 00 Vp p Horiz Rate Vert Rate 18 118 80 Vp p Horiz Rate 17 96 4 Vp p Horiz Rate WAVE FORM ...

Страница 19: ...8 5 CATHODE CATHODE CATHODE ANODE ANODE ANODE EXA520WJ EXA535WJ EXA572WJ CATHODE ANODE ISS356 5 1 8 2 27 2SC3198 Y 2SD468 C C6090 1 KIA78R05 2SD1913 2SA1266 STRW6553 2SC3198 G CATHOD ANODE RED PK0013 LA78041 DX0445CE 1 7 ANODE CATHOD D3SB 60 74 DX0470CE LA42102 GND COLLECTOR Vout SE125N ...

Страница 20: ...ignal of 1 0V peak applied at pin 24 of IC201 2 Approximately 4V AGC bias SAFETY NOTES 1 DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS 2 SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OP ERATING IMPORTANT SAFETY NOTICE PARTS MARKED WITH ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET BE SURE TO RE PLACE THESE PARTS WITH SPECIFIED O...

Страница 21: ...21 21ES251E 21ES253E 21ES353E ...

Страница 22: ...GA 8S CRT All 21 US 21EPS258E 21EMS258E 21ECS258E 21ES251E 21ES353E 21ES253E MARTINUS DEDI S DIAN T MGR CHI ENG KZ018JCE ...

Страница 23: ...21ES251E 21ES253E 21ES353E ...

Страница 24: ... DEDI S DIAN T IC801 IXC844WJ QA040WJN1 CA054WJ RJ8 0 RJ9 0 R1088 1K NA792WJ NA890WJ PA006WJ RA874WJFW RA831WJFW RA832WJFW RA759WJFW EZB526WJ VXA210WJ PA024WJ WA303WJ 6800p 6800p C383 C384 0 1u 50V 0 1u 50V 1 1 1 4 7k 4 7k N2 C810 0 01u C821 0 01u C835 0 01u ...

Страница 25: ...COPYRIGHT 20 ALL RIGHTS RESERVED ...

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