Sharp 54GT-25S Service Manual
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Sharp 54GT-25S Service Manual

Sharp 54GT-25S Service Manual

Pal system colour television
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TELETEXT
ELECTRICAL SPECIFICATION........................3
IMPORTANT SERVICING NOTES ..................4
SERVICE ADJUSTMENTS...............................5
PRINTED WIRING BOARDS...........................12
PARTS ALLOCATION TABLES.......................16

SHARP CORPORATION

SERVICE MANUAL

PAL SYSTEM COLOUR TELEVISION
54GT-25S
MODEL
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
CONTENTS
BLOCK DIAGRAM...........................................26
TROUBLESHOOTING TABLES......................28
PART LIST.......................................................30
1
54GT-25S
SESG54GT25S00
Issued: 24nd Nov '00
GA-1
CHASSIS
This document has been published to
be used for after sales service only.

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  • Page 1: Table Of Contents

    54GT-25S SERVICE MANUAL SESG54GT25S00 Issued: 24nd Nov ‘00 GA-1 CHASSIS PAL SYSTEM COLOUR TELEVISION 54GT-25S MODEL TELETEXT In the interests of user safety (required by safety regulations in some countries) the set should restored to its original condition and only parts identical to those specified should be used.
  • Page 2 54GT-25S SERVICE MANUAL UPDATE LOG SHEET Application Technical Report # Cause / Solution Part # Page # Technical Bulletin # Data /Serial # Use this page to keep any special servicing information as Thecnical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly on Part List Section.

  • Page 3: Electrical Specification

    54GT-25S ELECTRICAL SPECIFICATIONS ......33.4MHz •Sound Carrier Trap •Power Input .......220V-240 Volts AC 50Hz •Power Consumption Normal Operation........52W •Adjacent Sound Carrier Trap ....40.4MHz Stand-by Operation.........7.0W •Audio Power Output Rating .....4W (MPO) ....31.9MHz •Adjacent Picture Carrier Trap Ω Speaker......16 4W, 10cm Round, 1pc Convergence......Self Converging System...

  • Page 4: Important Servicing Notes

    54GT-25S IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out mintenance and repair of this receiver. SERVICING OF HIGH VOLTAGE SYSTEM AND CRT It is important that the static charge is removed from the high voltage system when carrying out work on the receiver.

  • Page 5: Service Adjustments

    54GT-25S SERVICE ADJUSTMENT •SERVICE MODE FUNCTION 1. Connect a test pattern to the antenna terminal. 2. Tune the receiver to this signal. 3. Turn the receiver off using the mains switch. 4. Press the volume down and channel up buttons on the front of the receiver at the same time.
  • Page 6 54GT-25S Adjustment of Data within the NVM memory To access the NVM memory, press the channel up button on the remote control until the NVM setting is reached. Note that the NVM address is shown in green and the NVM value is shown in red.
  • Page 7 54GT-25S 3$*( $''5(66 '(6&5,37,21 9$/8( 6B&255 6&255(&7,21 (B&$* &$* $'-867(0(17 9$/8( ($B237 79 237,216  )3 6<67(0 %*   %*/ 0(66$*( 5(&+(5&+(  $9 )5217$/ 127 ,1&/8'('   ,1&/8'('   781,1* /2&. +27(/  /2&.('6:,7&+21 35  12 /2&.('   8+)21/< %$1' 8+)  $// %$1'6   3$/ 21/<   3$/ 6(&$0  ...
  • Page 8 54GT-25S 3$*( $''5(66 '(6&5,37,21 9$/8( 1B+8( +8( &255(&7,21 & &217 &2175$67 &2/25 &2/25 6$785$7,21 %5,*+7 %5,*+71(66 /83. 333 /80$ 3($.,1* 9$/8( /83. '.B237,21 237,21 )25 '. 6<67(0 >; ; ; ; ; ; ; '.B6@ +&5B190 (1' 2) +25,=217$/ &/$03 38/6(...
  • Page 9 54GT-25S PAGE ADDRESS DESCRIPTION VALUE PAGE MEMORY FOR LIST MODE PROGRAM 1 PAGE MEMORY FOR LIST MODE PROGRAM 2 PAGE MEMORY FOR LIST MODE PROGRAM 3 PAGE MEMORY FOR LIST MODE PROGRAM 4 PAGE MEMORY FOR LIST MODE PROGRAM 5...
  • Page 10 54GT-25S • • • • • PIF/AGC Adjustment • • • • • Screen Adjustment 1. AFT Adjustment 3. Focus Adjustment AFT must be adjusted to a fixed value of 40. Apply mains voltage of 220V AC/50HZ to TV. Receive Philips pattern signal to a level between 60 and 80 dBµV.
  • Page 11 54GT-25S •COLOUR ADJUSTMENT PROCEDURES 1. Y-DLY a) Receive Philips pattern signal. ∧ b) When button is pressed, luma phase delays. ∨ c) When button is pressed, chroma phase delays. d) Adjust the chroma-luma delay. 2. «B-GAIN», «G-GAIN», «R-GAIN» a) Adjust G2.

  • Page 12: Printed Wiring Boards

    54GT-25S F 7320NOB PRINTED WIRING BOARD. Components side. S1001 S1002 S1003 S1004 D1021 C1004 RMC1 QKITP7320BMN D1011 F7320BMN0 F7321BM P883 L701 VA701 C702 L702 J816 SC881 J909 L703 J815 R751 T751 R752 K7321BM F701 R753 C874 D719 C719 R703 C753...
  • Page 13 54GT-25S F 7320NOB PRINTED WIRING BOARD. Components side. D1021 L303 C1004 J401. FB301 C403 L401 ITP7320BMN0 J134 J301. B Q3011 R312 F7320BMN0 P301 C309 Q301 C304 F7321BMN0 L304 C301 Q302 J207 J410 P851 Q3021 J106 C878 R305 L881 P883 J148...
  • Page 14 54GT-25S F 7320NOB PRINTED WIRING BOARD. Copper side. J301. J401. D1021 C303 R402 C403 R403 L303 RJ123 C1004 L401 RJ128 FB301 J134 C305 R311 P301 Q3011 R312 F7320BMN0 C304 RJ141 L304 Q301 C309 Q303 P851 Q305 R307 C878 P883 R309...
  • Page 15 54GT-25S F 7320NOB PRINTED WIRING BOARD. Copper side. D1021 1004 RMC1 S1004 S1003 S1002 S1001 D1011 P883 L701 S701 J816 L702 SC881 L703 J815 J909 R751 R752 F7321BMN0 T751 R753 FH1001 FH1002 IC751 D719 R756 R703 D710 C719 RDA1 C753...

  • Page 16: Parts Allocation Tables

    54GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (component side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm (L3) 142748 171831 C422 181737 34798 C804 169037 102489 D507 100076 80264 F701 19304 177927...
  • Page 17 54GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (component side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ymm J317 224282 68199 J430 229108 67818 P201 234569 14478 R1049 193548 150241 R707 34544 143510 J318...
  • Page 18 54GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (copper side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm C1001 212725 199644 C243 226568 24003 C813 189230 87757 Q201 165481 66929 R1028 221107 169545...
  • Page 19 54GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (copper side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm R361 176657 84328 R615 205232 123063 R879 162814 187325 RJ19 216662 165735 RJ72 143764 43307 R362 201422 42291...

  • Page 20: Solid State Device Base Diagram

    54GT-25S SOLID STATE DEVICE BASE DIAGRAM 33 32 33 32 33 32 33 32 RH-IX1812BMZZ RH-TX0199BMZZ RH-IX1818BMZZ 33 32 VHIPC123ZY-1 RH-IX0037CEZZ VSIMT1A/A//-1* 33 32 RH-TX0108BMZZ RH-TX0142BMZZ RH-TX0112BMZZ RH-TX0216BMZZ RH-TX0132BMZZ RH-TX0181BMZZ RH-TX0217BMZZ RH-TX0204BMZZ RH-TX0180BMZZ RH-TX0218BMZZ 33 32 RH-TX0113BMZZ VS2SA1037KQ-1 VS2SC2412KQ-1 (SMD COMPONENT)

  • Page 21: Schematic Diagram, Wave Forms

    54GT-25S DESCRIPTION OF SCHEMATIC DIAGRAM NOTE: SAFETY NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 1. DISCONNECT THE AC PLUG FROM THE AC ohms. M= Megaohm). OUTLET BEFORE REPLACING PARTS. 2. All resistors are 1/8 watt. unless otherwise noted.
  • Page 22 54GT-25S Page 24 SCHEMATIC DIAGRAM (00 Version).
  • Page 23 54GT-25S Page 25 SCHEMATIC DIAGRAM (00 Version).
  • Page 24 54GT-25S SCHEMATIC DIAGRAM (01 Version).
  • Page 25 54GT-25S SCHEMATIC DIAGRAM (01 Version).

  • Page 26: Block Diagram

    54GT-25S BLOCK DIAGRAM 51GT25H S1001 S1002 S1003 S1004 VOL+ VOL- AC 220-240V 50HZ IC1002 P701 N0304CE F701 T3.15A +150V SC881 VD842CE 150V H.V. Q883 S 7 0 1 Q885 HEATER IC1001 Q887 L701 A D G C O I L...
  • Page 27 54GT-25S BLOCK DIAGRAM RMC0001 RMCU0222CE J 3 0 1 D 1 0 2 1 S P 3 0 1 Q 1 0 0 3 X1001 P 3 0 1 6 MHZ 3 . 3 V Audio Q305 Mute Q901 X801 4.43MHZ...

  • Page 28: Troubleshooting Tables

    54GT-25S TROUBLESHOOTING TABLES. NO FUNCTION(NO SOUND AND NO PICTURE) Is D1011 Not light (LED) on a light? Yes, red Check F701, R703 and Broken Q701 Check Q711 Approx. 0 V emitter Check Q701, voltage D718, C718 Normal Q601 Check R737, D713,Q704, Approx.
  • Page 29 54GT-25S TROUBLESHOOTING TABLES. NO VERTICAL SCAN NO PICTURE Check Open Are R504 or R609 Broken R608 Broken? Change R609 Normal Check Q507 and R504 Normal Check C867 Is R512 voltage Broken Broken? Check C876, T601 and connection G2 Check Q5091...

  • Page 30: Part List

    54GT-25S PART LIST TROUBLESHOOTING TABLES. REPLACEMENT PARTS Replacement parts which have special safety characteristics are identi- fied in this manual. Electrical components having such features are iden- tified by in the Replacement Part List. NO SOUND The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended is not permitted.
  • Page 31 54GT-25S 5() 1R 3$576 '(6&5,37,21 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 61 &2'( (; &2'( 4  5+7;%0== 757 6&6< .(& 6  '  5+';%0== ',2'( 1 6 $$ '  5+';%0== ',2'( 1 6 $$ 4  5+7;%0==...
  • Page 32 54GT-25S 5() 1R 3$576 '(6&5,37,21 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 61 &2'( (; &2'( &  9&.<79+%. &(5$0 & 1) 9 60' 6 $$ &  9&.<79+)= &(5$0 & 1) 9 60' 6 $$ &  9&($*$$:0 (/(&...
  • Page 33 54GT-25S 5() 1R 3$576 '(6&5,37,21 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 61 &2'( (; &2'( 5  95679-'-   2+0  : 60' 6 $$ 5  95679-'-  .2+0  : 60' 6 $$ 5  95679-'-  .2+0  : 60'...
  • Page 34 54GT-25S 5() 1R 3$576 '(6&5,37,21 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 61 &2'( (; &2'( 5  95679-'-   2+0  : 60' 6 $$ 5-  95679-'-   2+0  : 60' 6 $$ 5  95679-'-  .2+0  : 60'...
  • Page 35 54GT-25S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( &2,/6 /  93&). 3($. &2,/ 8+  6 $% $& &$3$&,7256 &  9&&679+/- &(5$0 & 3) 9 60' 6 $$ &  9&&679+/- &(5$0 & 3) 9 60' 6 $$ &...
  • Page 36 37GQ-20FP RECYCLED PAPER PRINTED BY:...

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