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Sharp 28JW-74E Service Manual
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Sharp 28JW-74E Service Manual

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PAL
B/G, I
ELECTRICAL SPECIFICATIONS ................... 3
IMPORTANT SERVICING NOTES ................. 4
CONTROLS & TERMINALS ........................... 5
ADJUSTMENT PROCEDURES ...................... 6
LED FLASHING CODES ............................... 13
PRINTED WIRING BOARDS ........................ 14
COMPONENT LOCATION TABLES ............... 22
CHASSIS LAYOUT ......................................... 29
SHARP CORPORATION
SERVICE MANUAL
/ SECAM
L/L', B/G, D/K
In the interests of user safety (required by safety
regulations in some countries) the set should be re-
stored to its original condition and only parts identi-
cal to those specified should be used.
CONTENTS
SCHEMATIC DIAGRAMS ............................... 32
BLOCK DIAGRAM ....................................... 45
TROUBLESHOOTING TABLES ..................... 46
ICs ADDITIONAL INFORMATION .................. 51
PARTS LISTING ............................................. 67
SERVICING NOTES.................................... 77
SOURCE OF DOCUMENTATION .................. 79
1
GA-200
SYSTEM COLOUR TELEVISION
MODEL
28JW-74E
This document has been published to
be used for after sales service only.
28JW-74E
SE0028JW74E00
Issued: 2
April 2003
nd
CHASSIS
ES

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  • Page 1: Table Of Contents

    28JW-74E SERVICE MANUAL SE0028JW74E00 Issued: 2 April 2003 GA-200 CHASSIS / SECAM SYSTEM COLOUR TELEVISION B/G, I L/L’, B/G, D/K MODEL 28JW-74E In the interests of user safety (required by safety regulations in some countries) the set should be re- stored to its original condition and only parts identi- cal to those specified should be used.
  • Page 2 28JW-74E SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.

  • Page 3: Electrical Specifications

    28JW-74E ELECTRICAL SPECIFICATIONS •Sweep Deflection ......Magnetic •Power Input ....220V-240 Volts AC 50Hz •Power Consumption •Picture Intermediate frequency Normal Operation (Method IEC60107) ....90W L’ ..........33.9MHz Stand-by Operation ..........1.5W L, B/G, D/K,I ......38.9MHz •Sound Carrier Trap L’ ..........40.4MHz •Audio Power Output Rating (MPO) / Impedance...

  • Page 4: Important Servicing Notes

    28JW-74E IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out maintenance 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: Controls & Terminals

    28JW-74E CONTROLS & TERMINALS )URQW 79      +RZ WR RSHQ WKH GRRU %HKLQG WKH GRRU /6*, 5''' 69,'(2 9,'(2 $8',2 5HDU 79 SLQ ,Q2XW 5) ,QSXW :22)(5 6&$57 3(5,7(/(9,6,21 5($5 )5217 $97(50,1$/ $9...

  • Page 6: Adjustment Procedures

    28JW-74E REMOTE CONTROL 1. Stand-by button (TV) Video 2. Power button (VCR) 3. 0 ~ 9 digit buttons 4. Flash back button Teletext 5. GREEN button 6. RED button 7. Volume DOWN button 8. MENU button Teletext 9. REVEAL button 10.
  • Page 7 28JW-74E • • • • • Use the channel up and down buttons to move between the options. • • • • • Use the volume control buttons to change the data. • • • • • To store the data, use the stand-by button on the remote control.
  • Page 8 28JW-74E The following geometry adjustments can be carried out. Detailed instructions on how to execute these are given on the following pages: Horizontal • Horizontal Shift Vertical • Vertical Amplitude • East West Width • Pin Phase • S Correction •...
  • Page 9 28JW-74E Upper Corner Correction Adjust the Upper Corner Correction so that the picture is centred. The effect of this adjustment is shown in figure 6. • When the volume up button is pressed, side pincushion changes from pincushion to barrel shape.
  • Page 10 28JW-74E Vertical Bow Adjust the Vertical Bow so that the picture is centred. The effect of this adjustment is shown in figure 11. • When the volume up button is pressed, the vertical bow changes to left. • When the volume down button is pressed, the vertical bow changes to right.
  • Page 11 5. If another NVM value has to be changed, use the channel down button to select the page or position and repeat as necessary. Note: DO NOT change any NVM data, unless you have been advised to do so by a Sharp representative. If data is incorrectly changed, serious damage may occur to the receiver. Contrast Adjustments Three types of contrast levels can be varied as listed below: •...
  • Page 12 28JW-74E DVCO Adjustment (NTSC) Carry out the DVCO Adjustment (NTSC) as shown below: 1. Receive a color pattern signal (NTSC 3.58). 2. While in the DVCO ADJUSTMENT (NTSC) menu, press the stand-by button. 3. The adjustment will be carried out automatically and stored.

  • Page 13: Led Flashing Codes

    28JW-74E LED FLASHING CODES This model is not provided with stereo led, so to let “flashing codes” for IC failures detection when the TV set does not work, we offer the next solution: • The detection of failure will be made with an external LED.

  • Page 14: Printed Wiring Boards

    28JW-74E PRINTED WIRING BOARDS F7351N4A Mother Unit PWB. Component side. K7351BM S702 S704 S705 M1000 (SWRC) R1036 C1022 LP701 D1002 D1001 S703 (RC) S701 Q706 (OPC) (ST) C701 L701 C703 R730 C706 VR701 D702 D703 D701 C746 D704 (AA) C704...
  • Page 15 28JW-74E F7351N4A Mother Unit PWB. Component side. PWBF7351BMN4 L352 R351 R358 C356 (SS) (FV) C361 R423 IC301 C1031 C363 (HD) L350 L302 C351 C1052 C378 C388 C389 IC302 L351 (YC) L303 J193 R337 C365 L315 +16V D798 L702 J212 R359...
  • Page 16 28JW-74E F7351N4A Mother Unit PWB. Copper side. QWBF7351BMN4 JF71 R353 R351 C359 D306 R358 C353 C356 C380 C382 L352 (SS) (FRONT) C1043 R352 R346 D311 R436 C350 (FV) C361 R350 C354 R335 C391 C364 C387 C1031 C416 C1052 R338 L353...
  • Page 17 28JW-74E F7351N4A Mother Unit PWB. Copper side. S703 S705 S704 M1000 R1042 R1055 (SW1) JF56 JF58 R1032 R1031 R1019 Q1002 Q1003 R1013 R1037 S702 LP701 (SWRC) (RC) R1015 S701 D1002 D1001 (ST) (OPC) D703 D702 C799 D701 D704 (AA) J196...
  • Page 18 28JW-74E F7269N4 CRT Unit PWB Component side R883 R5425 C862 R875 IC851 C5420 FB851 GREEN C5410 D5410 Q857 D5411 Q5414 D862 C891 R5438 C868 Q854 C895 C5417 R5446 C854 R857 R5436 C863 R893 Q853 SG865 R5424 R5441 R5421 R860 D870...
  • Page 19 28JW-74E F7269N4 CRT Unit PWB Copper side R5439 C892 C862 R5425 R883 R875 IC851 R868 C5410 FB851 D5410 C882 Q857 Q856 C5424 C888 D5411 D862 C851 C883 R5446 C5417 D866 C891 R5438 Q854 Q5414 C895 C868 R857 R893 C854 R854...
  • Page 20 28JW-74E F7353N1 TVTextPRO Digital Module Unit PWB Component side C6069 Q6006 JF6013 (RT) JF6012 R6043 C6025 L6001 IC6005 C6035 X6001 Q6005 C6043 L6002 R6046 X6002 ESPA¥A (YC) R6061 FB6046 R6063 K7353BM FB6047 C6052 R6005 (VI) JL2. R6004 L6004 L6006 R6038...
  • Page 21 28JW-74E FB515N0B POWER SWITCH Unit PWB CAUTION ! C6701 R6702 R6701 C6707 R6705 R6706 R6703 R6704 D6401 R6449 JF6703 JF6702 JF6701 L6318 C6337 R6317 R6316 L6317...

  • Page 22: Component Location Tables

    28JW-74E COMPONENT LOCATION TABLES F7351N4A Mother Unit PWB Component side 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP...
  • Page 23 28JW-74E F7351N4A Mother Unit PWB Component side 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP...
  • Page 24 28JW-74E F7351N4A Mother Unit PWB Copper side 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP...
  • Page 25 28JW-74E F7351N4A Mother Unit PWB Copper side 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP...
  • Page 26 28JW-74E F7269N4 CRT Unit PWB Component side Copper side No Parts 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP 5HI 1R <XP...
  • Page 27 28JW-74E F7353N1 TVTextPRO Digital Module Unit PWB Component side Copper side 5HI 1R <XP 5HI 1R ;XP <XP 5HI 1R <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP...
  • Page 28 28JW-74E F7353N1 TVTextPRO Digital FB515N0B Power Switch Module Unit PWB. Unit PWB. Copper side. Component side. 5HI 1R <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP Copper side No Parts...

  • Page 29: Chassis Layout

    28JW-74E CHASSIS LAYOUT PWB A- Mother Unit, F7351N4A...
  • Page 30 28JW-74E PWB B- CRT Socket Unit, F7269N4 IC851 Q5407 (SVM) Q5408 (G2) IC850 L864 (RT) IC852 IC1601 (MO) PWB C- TVTextPRO Digital Module Unit, F7353N1 X6001 IC6006 X6002 (YC) IC6007 IC6001 IC6003 (VI) (YA) (YB)
  • Page 31 28JW-74E PWB D- Power Switch Unit, FB515N0B...

  • Page 32: Schematic Diagrams

    28JW-74E SCHEMATIC DIAGRAMS Description 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 33 28JW-74E...
  • Page 34 28JW-74E...
  • Page 35 28JW-74E SDA5550 SDA5550...
  • Page 36 28JW-74E SDA5550 SDA5550 SDA5550 SDA5550 SDA5550...
  • Page 37 28JW-74E Schematic Diagram of CRT Unit (F7269N4)
  • Page 38 28JW-74E Page 40 Schematic Diagram of Mother Board Unit (F7351N4A)
  • Page 39 28JW-74E Page 41 Schematic Diagram of Mother Board Unit (F7351N4A)
  • Page 40 28JW-74E Schematic Diagram of Mother Board Unit (F7351N4A)
  • Page 41 28JW-74E Schematic Diagram of Mother Board Unit (F7351N4A)
  • Page 42 28JW-74E Schematic Diagram of TVTextPRO Digital Module Unit (F7353N1)
  • Page 43 28JW-74E Schematic Diagram of TVTextPRO Digital Module Unit (F7353N1) 57 *1 Firmado Firmado Firmado digitalmente por digitalmente por digitalmente por Castillo, Fco. Josep Vila Sola ADOLFO Nombre de Nombre de FERNANDEZ reconocimiento reconocimiento Nombre de (DN): cn=Castillo, (DN): cn=Josep reconocimiento Fco.,...
  • Page 44 28JW-74E Schematic Diagram of Switch A/V Unit (FB515N0B)

  • Page 45: Block Diagram

    28JW-74E BLOCK DIAGRAM...

  • Page 46: Troubleshooting Tables

    28JW-74E TROUBLESHOOTING TABLES 7+( +25,=217$/ 67$*( 67$57 83 %87 7+( 3,&785( 25 6281' ,6 127 &255(&7 ± ‡ ‡ *Although the checking of these parts could be right, they may be partially damaged. So if the problem remains proceed to replace all parts.
  • Page 47 28JW-74E 7+( +25,=217$/ 67$*( 67$57 83 %87 ,7 *2(6 72 67%< $*$,1 9(57,&$/ 67$*( 3527(&7,21 $&76 ± Test Point...
  • Page 48 28JW-74E ',*,7$/ 02'8/( * XXJF74E and XXJW74E models don’t have a stereo led. Please refer to “LED FLASHING CODES” (Page 13). Test Point...
  • Page 49 28JW-74E 7+( 79 6(7 '2(6 127 67$57 83 *In the original situation (with the Digital Module assembled) this value is 1.8V.
  • Page 50 28JW-74E Note: Once the TV set has been repaired, have in mind to put the TV set in the default situation (undo short- circuits, specially the applied in Q1004).

  • Page 51: Ics Additional Information

    28JW-74E ICs ADDITIONAL INFORMATION TDA9886TS (IC201) Features FEATURES • 5 V supply voltage • Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier, AC-coupled • Multistandard true synchronous demodulation with active carrier regeneration: very linear demodulation, • SIF-AGC for gain controlled SIF amplifier, single...
  • Page 52 28JW-74E TDA9886TS (IC201) Block Diagram handbook, full pagewidth...
  • Page 53 28JW-74E TDA9886TS (IC201) Pin Description SYMBOL DESCRIPTION TDA9886T TDA9885T TDA9885HN TDA9886TS TDA9885TS VIF1 VIF differential input 1 VIF2 VIF differential input 2 − − n.c. not connected output port 1; open-collector FMPLL FM-PLL for loop filter DEEM de-emphasis output for capacitor...
  • Page 54 28JW-74E MSP3410G (IC303) Block Diagram...
  • Page 55 28JW-74E MSP3410G (IC303) Pin Assignments SC2_IN_L SC2_IN_R SC3_IN_R SC3_IN_L SC1_IN_L SC1_IN_R SC4_IN_R VREFTOP SC4_IN_L MONO_IN AGNDC AVSS AHVSS AVSS AHVSS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41...
  • Page 56 28JW-74E TDA7480L (IC501) 10W OUTPUT POWER: = 8Ω/4Ω; THD = 10% HIGH EFFICIENCY NO HEATSINK SPLIT SUPPLY OVERVOLTAGE PROTECTION ST-BY AND MUTE FEATURES SHORT CIRCUIT PROTECTION PDIP20 (14+3+3) THERMAL OVERLOAD PROTECTION DESCRIPTION The TDA7480L is an audio class-D amplifier as-...
  • Page 57 28JW-74E TDA6111Q (IC850, IC851, IC852) Block Diagram supply voltage feedback input HIGH output handbook, full pagewidth MIRROR MIRROR FOLLOWERS cathode transient V bias output C par cathode inverting DC output input DIFFERENTIAL TDA6111Q STAGE non-inverting black current input measurement output...
  • Page 58 28JW-74E SDA5550 (IC6001) Block Diagram 6hy‚tà ˆ‘ Tyvpr… HPRU\ ([WHQVLRQ 6p„ˆv†v‡v‚ 6WDFN !'Y' Q…‚t…h€ÃSP !$%Y' !'FY' 6p„ˆv†v‡v‚Ãv‡r…shpr v‡r…shpr Memory Extension Unit 8hƒ‡ˆ…rÃp‚‡…‚y '$ T %F‘'iv‡ Qr…vƒur…hy 7ˆ† Counter 0 7ˆ† 6…iv‡r… Core D‡r…shpr Counter 1 Q‚…‡ÃG‚tvp Interrupt Controller &KDUDFWHU %FY'...
  • Page 59 28JW-74E SDA9380 (IC6006) Block Diagram φ2 φ2 φ2 φ2 SWITCH D/A VBLO HPROT VPROT PROTON PROTECTION I²C H-OUT START UP BSOIN RESN V-OUT TEST CONTROL FH1_2 VSYNC EW-OUT HSYNC CLEXT CLKI IBEAM HSAFE PW/PH-CORR H35K H38K AVERAGE BEAM LIMITER RGB 2...
  • Page 60 28JW-74E SDA9380 (IC6006) Pin Description Pin No. Name Type Description CLKI I/TTL Input for external line locked clock *) Reference oscillator output, Crystal Reference oscillator input, Crystal CLEXT I/TTL Switching between internal (L) and external clock (H) *) TEST I/TTL...
  • Page 61 28JW-74E SDA9380 (IC6006) Pin Description Pin No. Name Type Description VREFH Reference voltage VBLO Q/TTL Vertical blanking output VREFN Ground for VREFH VREFC Reference current input Dark current input for cut off and white level control VDD(A4) Analog supply Y/R 0...
  • Page 62 28JW-74E SDA9380 (IC6006) Pin Assignments 64 63 62 61 60 59 58 57 56 55 54 53 50 49 CLKI B/V 1 G/U 1 R/Y 1 CLEXT VSS(A4) TEST V/B 0 SUBST U/G 0 RESN Y/R 0 VDD(A4) SDA 9380...
  • Page 63 28JW-74E VSP9402A (IC6007) Block Diagram...
  • Page 64 28JW-74E VSP9402A (IC6007) Pin Description pin 9402/32 9412/42 I/O 9402/32 9412/42 remark...
  • Page 65 28JW-74E VSP9402A (IC6007) Pin Description pin 9402/32 9412/42 I/O 9402/32 9412/42 remark...
  • Page 66 28JW-74E VSP9402A (IC6007) Pin Description pin 9402/32 9412/42 I/O 9402/32 9412/42 remark In 9402 A31 (and higher) and in VSP94xxA/B/C, this pin is shared by 656vin and blank...

  • Page 67: Parts Listing

    28JW-74E PARTS LISTING 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( REPLACEMENT PARTS Replacement parts which have special safety characteristics are identified in this manual. Electrical components having such features are identified by in the Replacement Parts Listing. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended is not permitted.
  • Page 68 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( &2,/6 &(5$0,& ),/7(56 75$16)250(56 &$3$&,7256 3$&.$*(' &,5&8,76...
  • Page 69 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'(...
  • Page 70 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5(6,67256...
  • Page 71 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'(...
  • Page 72 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 3:%% &57 81,7 ,17(*5$7(' &,5&8,76 75$16,67256 0,6&(//$1(286 3$576 ',2'(6 &2,/6 &$3$&,7256...
  • Page 73 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 3:%& ',*,7$/ 02'8/( ,17(*5$7(' &,5&8,76 75$16,67256 5(6,67256 ',2'(6 3$&.$*(' &,5&8,76 &2,/6 &$3$&,7256 0,6&(//$1(286 3$576...
  • Page 74 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 0,6&(//$1(286 3$576 5(6,67256...
  • Page 75 28JW-74E 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 0,6&(//$1(286 3$576 3:%' )5217$/ 6:,7&+ ',2'(6 &$3$&,7256 2:1(56 0$18$/6 5(6,67256 &$%,1(7 3$576 0,6&(//$1(286 3$576...
  • Page 76 28JW-74E...

  • Page 77: Servicing Notes

    28JW-74E SERVICING NOTES 1. How to rewrite the data in NVM. The NVM (Non Volatile Memory) is a read/write device aimed to keep the data even in the absence of power. The NVM contains IC configuration data, factory abjustable parametes (geometries, color temperature, etc.) and user settings (video, audio, programs, etc.).
  • Page 78 28JW-74E 2. Packing of the Set & Accessories Pack-ad SPAKX4077BMZZ Wrapper SPAKP2006BMZZ FRONT SPAKC5495BMZZ Carton Box Batteries UBATU0013TAZZ R/C Battery Cover GCOVHA010WJSA Remote Control RRMCG1073BMSA...

  • Page 79: Source Of Documentation

    28JW-74E SOURCE OF DOCUMENTATION 1. TDA 9886, Philips Data Sheet: TDA9885; TDA9886. I C-bus controlled single and multistandard alignment-fee IF-PLL demodulators. Product specification. 2002 Mar 05. http://www.semiconductors.philips.com/acrobat/datasheets/TDA9885_TDA9886_1.pdf 2. MSP3410G, Micronas Data Sheet: Preliminary data sheet: “MSP 34x0G Multistandard Sound Processor Family”...
  • Page 80 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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