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Sharp 51GT-25S Service Manual
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Sharp 51GT-25S Service Manual

Sharp 51GT-25S Service Manual

Pal system colour television
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REMOTE CONTROL
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
51GT-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
51GT-25S
SESG51GT25S00
Issued: 15th 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

    51GT-25S SERVICE MANUAL SESG51GT25S00 Issued: 15th Nov ‘00 GA-1 CHASSIS PAL SYSTEM COLOUR TELEVISION 51GT-25S MODEL REMOTE CONTROL 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 51GT-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

    51GT-25S ELECTRICAL SPECIFICATIONS ......33.4MHz Sound Carrier Trap Power Input .......220V-240 Volts AC 50Hz Power Consumption Normal Operation........54W ....40.4MHz Adjacent Sound Carrier Trap Stand-by Operation.........7.0W Audio Power Output Rating .....4W (MPO) ....31.9MHz Adjacent Picture Carrier Trap Speaker......16 4W, 10cm Round, 1pc Convergence......Self Converging System...

  • Page 4: Important Servicing Notes

    51GT-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

    51GT-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 51GT-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 51GT-25S...
  • Page 8 51GT-25S...
  • Page 9 51GT-25S DEFAULT LIST MODE PAGES MEMORIZATION NOTE: In page memory for LIST MODE, every digit is written in one nibble (4 bits). The default values for programs 0 7 are as follows: 100, 200, 300, 400. Example: Program 0 NVM Position:...

  • Page 10: Screen Adjustment

    51GT-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 dB V.
  • Page 11 51GT-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. b) Tune a white pattern c) Adjust colour to minimum.

  • Page 12: Printed Wiring Boards

    51GT-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 51GT-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 51GT-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 51GT-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

    51GT-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...
  • Page 17 51GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (component side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ymm...
  • Page 18 51GT-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...
  • Page 19 51GT-25S F7320N0B PWB PARTS ALLOCATION TABLES (copper side): Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm Ref No Xmm...

  • Page 20: Solid State Device Base Diagram

    51GT-25S SOLID STATE DEVICE BASE DIAGRAM 33 32 33 32 33 32 33 32 RH-IX1812BMZZ RH-TX0199BMZZ RH-IX1818BMZZ RH-TX0140BMZZ 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...

  • Page 21: Schematic Diagram, Wave Forms

    51GT-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 51GT-25S Page 24 SCHEMATIC DIAGRAM (00 Version). SLOW SLOW MUTE...
  • Page 23 51GT-25S Page 25 SCHEMATIC DIAGRAM (00 Version). DX0508BM D1020 R1032...
  • Page 24 51GT-25S SCHEMATIC DIAGRAM (01 Version). VIDEO L/L´ VSYNC BG/L SECAN_REC RESET XTAL CVBS VCC2.5 VCC2.5 FRONT FRONT PROT DX0045BM SLOW SLOW MUTE Page...
  • Page 25 51GT-25S SCHEMATIC DIAGRAM (01 Version). B-GAP CVBS SLOW VERT VERT BLN-0037CE VIDEO Page...

  • Page 26: Block Diagram

    51GT-25S BLOCK DIAGRAM S1001 S1002 S1003 S1004 VOL+ VOL- AC 220-240V 50HZ IC1002 P701 N0304CE F701 T3.15A +150V SC881 150V VD842CE H.V. Q883 S 7 0 1 Q885 HEATER IC1001 Q887 L701 A D G C O I L 2,5V...
  • Page 27 51GT-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

    51GT-25S TROUBLESHOOTING TABLES. NO FUNCTION(NO SOUND AND NO PICTURE)
  • Page 29 51GT-25S TROUBLESHOOTING TABLES. NO VERTICAL SCAN NO PICTURE...

  • Page 30: Part List

    51GT-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 51GT-25S REF No. PARTS DESCRIPTION REF No. PARTS DESCRIPTION SN CODE EX CODE SN CODE EX CODE DIODES PACKAGED CIRCUITS COILS CERAMIC FILTERS TRANSFORMERS CAPACITORS...
  • Page 32 51GT-25S REF No. PARTS DESCRIPTION REF No. PARTS DESCRIPTION SN CODE EX CODE SN CODE EX CODE...
  • Page 33 51GT-25S REF No. PARTS DESCRIPTION REF No. PARTS DESCRIPTION SN CODE EX CODE SN CODE EX CODE RESISTORS...
  • Page 34 51GT-25S REF No. PARTS DESCRIPTION REF No. PARTS DESCRIPTION SN CODE EX CODE SN CODE EX CODE...
  • Page 35 51GT-25S REF No. PARTS DESCRIPTION REF No. PARTS DESCRIPTION SN CODE EX CODE SN CODE EX CODE CAPACITORS RESISTORS MISCELLANEOUS PARTS MISCELLANEOUS PARTS MISCELLANEOUS PARTS CABINET PARTS PWB-B SOCKET UNIT TRANSISTORS DIODES COILS 1 2 1 2 REMOTE CONTROL...
  • Page 36 37GQ-20FP RECICLED PAPER PRINTED BY:...

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