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Sharp 28JF-76E Service Manual
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Sharp 28JF-76E Service Manual

Sharp 28JF-76E Service Manual

System colour television
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All manuals and user guides at all-guides.com
PAL
/ SECAM
B/G, I
ELECTRICAL SPECIFICATIONS ................... 3
IMPORTANT SERVICING NOTES ................. 4
CONTROLS & TERMINALS ........................... 5
ADJUSTMENT PROCEDURES ...................... 7
LED FLASHING CODES ............................... 14
PRINTED WIRING BOARDS ........................ 15
COMPONENT LOCATION TABLES ............... 23
CHASSIS LAYOUT ......................................... 30
SHARP CORPORATION
SERVICE MANUAL
SYSTEM COLOUR TELEVISION
L/L', B/G, D/K
MODEL
28JF-76E
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 ............................... 33
BLOCK DIAGRAM ....................................... 46
TROUBLESHOOTING TABLES ..................... 47
ICs ADDITIONAL INFORMATION .................. 52
PARTS LISTING ............................................. 71
SERVICING NOTES.................................... 81
SOURCE OF DOCUMENTATION .................. 85
1
28JF-76E
SE0028JF76E00
Issued :17
th
Oct. 2002
GA-200
CHASSIS
ES/SE/IT/C
This document has been published to
be used for after sales service only.

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  • Page 1: Table Of Contents

    All manuals and user guides at all-guides.com 28JF-76E SERVICE MANUAL SE0028JF76E00 Issued :17 Oct. 2002 GA-200 CHASSIS / SECAM SYSTEM COLOUR TELEVISION B/G, I L/L’, B/G, D/K MODEL 28JF-76E ES/SE/IT/C 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 All manuals and user guides at all-guides.com 28JF-76E 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.

  • Page 3: Electrical Specifications

    All manuals and user guides at all-guides.com 28JF-76E ELECTRICAL SPECIFICATIONS •Power Input ....220V-240 Volts AC 50Hz •Picture Intermediate frequency L’ ..........33.9MHz L, B/G, D/K,I ......38.9MHz •Power Consumption •Sound Carrier Trap Normal Operation (Method IEC60107) .... 105W L’ ..........40.4MHz Stand-by Operation ..........1.5W...

  • Page 4: Important Servicing Notes

    All manuals and user guides at all-guides.com 28JF-76E 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

    All manuals and user guides at all-guides.com 28JF-76E CONTROLS & TERMINALS HOW TO OPEN THE DOOR Lift the projection at the lower right of the door with your finger in the direction of the arrow. Front TV 1. Main power button 2.
  • Page 6 All manuals and user guides at all-guides.com 28JF-76E 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.

  • Page 7: Adjustment Procedures

    All manuals and user guides at all-guides.com 28JF-76E ADJUSTMENT PROCEDURES All adjustments to this chassis, except for focus and G2, are carried out in the Service Mode. • • • • • SERVICE MODE The Service Mode is provided to enable the engineer to correctly set up the receiver to the CRT fitted in the set.
  • Page 8 All manuals and user guides at all-guides.com 28JF-76E The following geometry adjustments can be carried out. Detailed instructions on how to execute these are given on the following pages: Horizontal Vertical • Horizontal shift • Vertical size • Horizontal size •...
  • Page 9 All manuals and user guides at all-guides.com 28JF-76E • When the volume down button is pressed, side pincushion changes from barrel shape to pincushion. • Press the stand-by button on the remote control to store. Upper corner correction Adjust the Upper Corner Correction so that the picture is centred.
  • Page 10 All manuals and user guides at all-guides.com 28JF-76E Vertical bow Adjust the Vertical bow so that the picture is centred. The effect of this adjustment is shown in Figure 12. • When the volume up button is pressed, the vertical bow changes to left.
  • Page 11 6.Operate in Service Mode and select location GREEN CUT OFF and BLUE CUT OFF, to obtain colour coordinates: X=0.290 ± 0.015 Y=0.300 ± 0.015 X=0.304 ± 0.015 Y=0.306 ± 0.015 (ONLY FOR 28JF-76E) To increase press volume-up button and to decrease press volume down button. BLUE CUT OFF alter «X» e «Y» coordinates. GREEN CUT OFF alter «Y»...
  • Page 12 6. 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.
  • Page 13 All manuals and user guides at all-guides.com 28JF-76E Flag NVM write ON/OFF To use this function to rewrite the NVM. It is only necessary when the software of Flash memory (IC6003) change . 1. Enter the Service Mode. 2. Press the Sound mode button(29) of Remote Control. “FLAG NVM WRITE ON” is activated.

  • Page 14: Led Flashing Codes

    All manuals and user guides at all-guides.com 28JF-76E 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: •...

  • Page 15: Printed Wiring Boards

    All manuals and user guides at all-guides.com 28JF-76E PRINTED WIRING BOARDS F7359N2 Digital Module Unit PWB Component side C6089 C6090 IC6011 C6025 Q6009 R6124 X6002 (RS) R6121 (RT) R6122 C6088 C6091 R6134 C6041 C6162 IC6002 IC6004 IC6006 C6144 IC6003 IC6007...
  • Page 16 All manuals and user guides at all-guides.com 28JF-76E F7351N1A 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...
  • Page 17 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB. Component side. PWBF7351BMN1 L302 L352 R358 C356 C1031 (SS) (FV) C361 R423 IC301 C363 L350 C351 (YC) (HD) C378 C388 C389 IC302 L351 L303 J193 (FRONT) (VS) R337...
  • Page 18 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB. Copper side. QWBF7351BMN1 L302 R353 L352 R358 C359 C353 C356 C380 C382 (SS) (FRONT) C1043 R352 R351 R436 C350 R350 (FV) C361 C354 C391 C364 R335 R329 C1031...
  • Page 19 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB. Copper side. S704 S703 S705 M1000 R1042 R1055 JF56 (SW1) JF58 R1032 R1031 JF55 R1019 Q1002 Q1003 R1013 R1037 (SWRC) S702 LP701 (RC) R1015 S701 D1002 D1001 (ST)
  • Page 20 All manuals and user guides at all-guides.com 28JF-76E F7269N3 CRT Unit PWB Component side R883 R5425 C862 R875 C5420 FB851 IC851 C5410 D5410 Q857 D5411 Q5414 D862 C891 R5438 C868 Q854 C5417 R5446 C854 R857 R5436 C863 R893 Q853 SG865...
  • Page 21 All manuals and user guides at all-guides.com 28JF-76E F7269N3 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 C895...
  • Page 22 All manuals and user guides at all-guides.com 28JF-76E FB452N0 POWER SWITCH Unit PWB CAUTION ! C6701 R6702 R6701 C6707 R6706 R6704 R6705 R6703 C6706 D6401 R6449 JF6703 JF6702 JF6701 L6318 C6337 R6317 R6316 L6317...

  • Page 23: Component Location Tables

    All manuals and user guides at all-guides.com 28JF-76E COMPONENT LOCATION TABLES F7359N2 Digital Module Unit PWB Component side Copper side...
  • Page 24 All manuals and user guides at all-guides.com 28JF-76E FB452N0 Power Switch Unit F7359N2 Digital Module Unit Copper side Component side...
  • Page 25 All manuals and user guides at all-guides.com 28JF-76E F7269N3 CRT Unit PWB Component side Ref No Ref No Ref No Ref No Ref No 136906 10922 C892 34544 112268 25654 97028 R5432 151384 35560 R893 73152 87884 (MO) 93726 10922...
  • Page 26 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB Component side...
  • Page 27 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB Component side...
  • Page 28 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB Copper side...
  • Page 29 All manuals and user guides at all-guides.com 28JF-76E F7351N1A Mother Unit PWB Copper side...

  • Page 30: Chassis Layout

    All manuals and user guides at all-guides.com 28JF-76E CHASSIS LAYOUT PWB A- Mother Unit, F7351N1...
  • Page 31 All manuals and user guides at all-guides.com 28JF-76E PWB B- CRT Socket Unit, F7269N3 IC851 Q5407 (SVM) Q5408 (G2) IC850 L864 (RT) IC852 IC1601 (MO) PWB C- Digital Module Unit, F7359N2 IC6010 X6002 (RT) (RS) IC6006 IC6002 IC6003 (VI) IC6001...
  • Page 32 All manuals and user guides at all-guides.com 28JF-76E PWB D- Power Switch Unit, FB452N0...

  • Page 33: Schematic Diagrams

    All manuals and user guides at all-guides.com 28JF-76E 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 34 All manuals and user guides at all-guides.com 28JF-76E Red Output Green Output Blue Output Video Output +12V E-W Output V Switch V Control St-By Vertical Input E-W Control 2 Inner Correction VH (1.2kV) Vertical+Input H Control...
  • Page 35 All manuals and user guides at all-guides.com 28JF-76E Vc (Horizontal) Vb (Horizontal) Headphone L Input Headphone R Input Speaker L Input Speaker L Output Speaker R Output Speaker R Input E-W Control 1 V Flyback Vertical Vertical Output Vertical - Input...
  • Page 36 All manuals and user guides at all-guides.com 28JF-76E R/C Pulses +400V (Power Supply Voltage) H Flyback Pulse Power Supply Switch Voltage 1 I Sense CRT Power Supply Switch Voltage 2 IF Video In Analog Y Out Analog U Out Analog V Out...
  • Page 37 All manuals and user guides at all-guides.com 28JF-76E SDA at M2 pins SCL at M2 pins M2 video In M2 6 MHz Xtal Input M2 6MHz Xtal Output SDA9380 24.576 MHz SDA9380 24.576 MHz Xtal Input Xtal Output VSP9407 20.25 MHz Xtal VSP9407 20.25 MHz Xtal...
  • Page 38 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of Digital Module Unit (F7359N2) R6141 +3.3VSTBY R6010 +2.5VD R6127 D6003 AVLIN +3.3VSTBY RxD0 Q6010 R6140 +3.3VSTBY R6009 BAS85 BC847B L6008 TxD0 TX0232BM R6011 R6126 Q6007 Q6003 BC847B BC847B C6001...
  • Page 39 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of Digital Module Unit (F7359N2) (RT) (RS) GN0842 GN0242 GN0441 R6127 +3.3VSTBY +12V R6123 C6081 R6126 100nF BYTE (VI) DQ15 GN0842 +3.3VSTBY IC6011 DQ14 +3,3VSTBY MC34164 DQ13 R6062 R6047 100K...
  • Page 40 All manuals and user guides at all-guides.com 28JF-76E Page 42 Schematic Diagram of Mother Board Unit (F7351N1A)
  • Page 41 All manuals and user guides at all-guides.com 28JF-76E Page 43 Schematic Diagram of Mother Board Unit (F7351N1A) SC3INL HPROT STBY HOUT...
  • Page 42 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of Mother Board Unit (F7351N1A) PROT HEADR HEADL SC2OUTR SC2OUTL SC1OUTR SC1OUTL MUTE SC4INL SC4INR HEADR HEADL...
  • Page 43 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of Mother Board Unit (F7351N1A) SC2OUTR SC2INR SC2OUTL SC2INL SSC-CLOCK B IN G IN R IN SC1OUTR SC1INR SC1OUTL SC1INL SSC-CLOCK SSC-DATA SC1OUTR SC3INR SC1OUTL SC3INL...
  • Page 44 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of CRT Unit (F7269N3)
  • Page 45 All manuals and user guides at all-guides.com 28JF-76E Schematic Diagram of Switch A/V Unit (FB452N0)

  • Page 46: Block Diagram

    All manuals and user guides at all-guides.com 28JF-76E BLOCK DIAGRAM...

  • Page 47: Troubleshooting Tables

    All manuals and user guides at all-guides.com 28JF-76E TROUBLESHOOTING TABLES ± ‡ ‡ *Although the checking of these parts could be right, they may be partially damaged. So if the problem remains proceed to replace all parts. Test Point...
  • Page 48 All manuals and user guides at all-guides.com 28JF-76E ± Test Point...
  • Page 49 All manuals and user guides at all-guides.com 28JF-76E * XXJF76E and XXJW76E models don’t have a stereo led. Please refer to “LED FLASHING CODES” (Page 14). Test Point...
  • Page 50 All manuals and user guides at all-guides.com 28JF-76E *In the original situation (with the Digital Module assembled) this value is 1.8V.
  • Page 51 All manuals and user guides at all-guides.com 28JF-76E 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 52: Ics Additional Information

    All manuals and user guides at all-guides.com 28JF-76E ICs ADDITIONAL INFORMATION TDA9886 (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, •...
  • Page 53 All manuals and user guides at all-guides.com 28JF-76E TDA9886 (IC201) Block Diagram handbook, full pagewidth...
  • Page 54 All manuals and user guides at all-guides.com 28JF-76E TDA9886 (IC201) Pinning 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...
  • Page 55 All manuals and user guides at all-guides.com 28JF-76E MSP3411G (IC303) Block Diagram Loud- Loud- Sound IF1 Pre- speaker speaker processing modulator Sound Sound IF2 Subwoofer Processing Headphone Headphone Sound Processing Prescale SCART1 SCART2 SCART SCART1 SCART3 Input Prescale SCART Select...
  • Page 56 All manuals and user guides at all-guides.com 28JF-76E MSP3411G (IC303) Pinning 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 57 All manuals and user guides at all-guides.com 28JF-76E 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 58 All manuals and user guides at all-guides.com 28JF-76E TDA6111 (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...
  • Page 59 All manuals and user guides at all-guides.com 28JF-76E SDA 6000 (IC6001) P-MQFP-128-2 ×...
  • Page 60 All manuals and user guides at all-guides.com 28JF-76E SDA 6000 (IC6001)
  • Page 61 All manuals and user guides at all-guides.com 28JF-76E SDA 6000 (IC6001) Block Diagram CVBS1 Slicer1 Data CVBS2 Slicer2 Internal 2 Kbyte Instr./Data Data CPU-Core Ι -Cache C166 16...21 Boot Addr. External Interface Interrupt Controller D-Cache Data XTAL (6 MHz) X-BUS Instr./Data...
  • Page 62 All manuals and user guides at all-guides.com 28JF-76E SDA 6000 (IC6001) Pinning P6.2 P6.3 P6.4 P6.5 DD33-5 P6.6 SS33-5 VSYNC HSYNC COR/RSTOUT BLANK/CORBLA DD33-8 SS33-8 XTAL1 DD33-4 XTAL2 SS33-4 SSA-1 DDA-1 P-MQFP-128-2 LDQM UDQM CSROM SSA-2 CLKEN DDA-2 CVBS2 CSSDRAM...
  • Page 63 All manuals and user guides at all-guides.com 28JF-76E 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 PW/PH-CORR...
  • Page 64 All manuals and user guides at all-guides.com 28JF-76E SDA9380 (IC6006) Pin Configuration 64 63 62 61 60 59 58 57 56 55 54 53 50 49 CLKI B/V 1 G/U 1 R/Y 1 VSS(A4) CLEXT TEST V/B 0 SUBST U/G 0...
  • Page 65 All manuals and user guides at all-guides.com 28JF-76E 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) *)
  • Page 66 All manuals and user guides at all-guides.com 28JF-76E 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...
  • Page 67 All manuals and user guides at all-guides.com 28JF-76E VSP9407 (IC6007) Block Diagram...
  • Page 68 All manuals and user guides at all-guides.com 28JF-76E VSP9407 (IC6007) Pinning...
  • Page 69 All manuals and user guides at all-guides.com 28JF-76E VSP9407 (IC6007) Pin Connections I Input O Output S Supply...
  • Page 70 All manuals and user guides at all-guides.com 28JF-76E VSP9407 (IC6007) Pinning Connections...

  • Page 71: Parts Listing

    All manuals and user guides at all-guides.com 28JF-76E PARTS LISTING 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 72 All manuals and user guides at all-guides.com 28JF-76E...
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  • Page 81: Servicing Notes

    All manuals and user guides at all-guides.com 28JF-76E SERVICING NOTES 1. Procedure to reprogram the flash memory (IC6003) contained in the digital module Equipment needed • A PC running MS Windows (Windows 98 Second Edition, Windows 2000 or Windows XP).
  • Page 82 All manuals and user guides at all-guides.com 28JF-76E contained in an “.hex” file. This file must conform to the Intel HEX-32 format. The software does check whether the program operation has been successful or not. 1 Installation of “Tiny M2Flash”: 1.1 Place the “.obj”...
  • Page 83 All manuals and user guides at all-guides.com 28JF-76E 2. GA-200 (M2) FLASH Memory Writer This Kit is available under request in EPC. Kit code: CKIT-0001WJV0. 220V./240V. AC 50Hz. PC COM_...
  • Page 84 All manuals and user guides at all-guides.com 28JF-76E 3. Packing of the Set & Accessories Pack-ad SPAKXA017WJZZ Wrapper SPAKP2006BMZZ Front SPAKCA083WJZZ Carton Box Batteries UBATU0013TAZZ R/C Battery Cover GCOVHA010WJSA Remote Control RRMCG1073BMSA...

  • Page 85: Source Of Documentation

    All manuals and user guides at all-guides.com 28JF-76E 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. MSP3411G, Micronas Data Sheet: Preliminary data sheet: “MSP 34x1G Multistandard Sound Processor Family with Virtual Dolby Surround”...
  • Page 86 All manuals and user guides at all-guides.com 28JF-76E Notes:...
  • Page 87 All manuals and user guides at all-guides.com 28JF-76E Notes:...
  • Page 88 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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