Sharp 28JS-74SS Service Manual
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Sharp 28JS-74SS Service Manual

Sharp 28JS-74SS Service Manual

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ELECTRICAL SPECIFICATIONS ................... 3
IMPORTANT SERVICING NOTES ................. 4
CONTROLS & TERMINALS ........................... 5
ADJUSTMENT PROCEDURES ...................... 7
LED FLASHING CODES ............................... 12
PRINTED WIRING BOARDS ........................ 13
COMPONENT LOCATION TABLES ............... 19
CHASSIS LAYOUT ......................................... 24
SHARP CORPORATION
SERVICE MANUAL
PAL / SECAM BG SYSTEM COLOUR TELEVISION
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
SCHEMATIC DIAGRAMS ............................... 26
BLOCK DIAGRAM ....................................... 38
TROUBLESHOOTING TABLES ..................... 39
ICs ADDITIONAL INFORMATION .................. 44
PARTS LISTING ............................................. 66
SERVICING NOTES.................................... 74
SOURCE OF DOCUMENTATION .................. 78
1
SE0028JS74S00
Issued :30
GA-200
CHASSIS
28JS-74S
This document has been published to
be used for after sales service only.
28JS-74S
th
July 2002
S

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  • Page 1: Table Of Contents

    PARTS LISTING ..........66 PRINTED WIRING BOARDS ......13 SERVICING NOTES........74 COMPONENT LOCATION TABLES ....19 SOURCE OF DOCUMENTATION ....78 CHASSIS LAYOUT ......... 24 SHARP CORPORATION This document has been published to be used for after sales service only.
  • Page 2 28JS-74S SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Application Cause / Solution Part No. Page No. Technical Bulletin No. Data /Serial 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. If you need more information, please refer to the Technical Report (Bulletin).

  • Page 3: Electrical Specifications

    Specifications are subject to change without prior notice. MODEL DIFFERENCES: 28JS-74S: Base model. 28JS-74SS: Silver Cabinet. 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.

  • Page 4: Important Servicing Notes

    28JS-74S 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

    28JS-74S CONTROLS & TERMINALS )5217 79  0DLQ 3RZHU 2Q2II 6ZLWFK  3RZHU ,QGLFDWRU  3URJUDP 6HOHFWRU 23&  ,  ,, &+ 83'2:1  9ROXPH %XWWRQV 83'2:1  5HPRWH &RQWURO 6HQVRU  6RXQG ,QGLFDWRU  5HPRWH &RQWURO ,QGLFDWRU  '225 +2: 72 23(1 7+( '225 23&...

  • Page 6: Remote Control

    28JS-74S REMOTE CONTROL  6WDQGE\ 212)) VZLWFK 79 9LGHR  3RZHU 21  2)) VZLWFK 9&5  'LJLW EXWWRQV  ∼   )ODVKEDFN EXWWRQ 9&5 799,'(2 7HOHWH[W  &RORXU EXWWRQ JUHHQ  &RORXU EXWWRQ UHG  9ROXPH 'RZQ&XUVRU FRQWURO /HIW  0HQX EXWWRQ 7HOHWH[W  5HYHDO EXWWRQ...

  • Page 7: Adjustment Procedures

    28JS-74S ADJUSTMENT PROCEDURES All adjustments to this chassis, except for focus, 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. Note that these adjustments may vary from one receiver to another.
  • Page 8 28JS-74S 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 • S Correction • Pin Phase •...
  • Page 9 28JS-74S 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 28JS-74S 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: Led Flashing Codes

    28JS-74S 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. AGC Adjustment To correctly align the Automatic Gain Control, follow the procedure outlined below: 1.

  • Page 13: Printed Wiring Boards

    28JS-74S PRINTED WIRING BOARDS F7353N0D Digital Module Unit PWB Component side Q6006 JF6013 (RT) JF6012 R6043 C6025 L6001 IC6005 C6035 Q6005 C6043 C6014 L6002 X6001 R6046 X6002 ESPA¥A C6037 R6061 FB6046 R6063 K7353BM FB6047 C6052 R6005 (VI) JL2. R6004 L6004 L6006 R6038 L6003...
  • Page 14 28JS-74S 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 C746 D704 (AA) C704 J196 R714 R746 R798 Q701 C798...
  • Page 15 28JS-74S 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 C365 L315 +16V D798 L702 R359 C372 D309 C377 L316...
  • Page 16 28JS-74S F7351N1A Mother Unit PWB. Copper side. QWBF7351BMN1 L302 R353 L352 R358 C359 C353 C380 C356 C382 (SS) (FRONT) C1043 R352 R351 R436 C350 R350 (FV) C361 C354 C391 C364 R335 R329 C1031 D307 C387 C416 R338 L353 R339 IC301 C351 R423 C375...
  • Page 17 28JS-74S F7351N1A Mother Unit PWB. Copper side. S703 S705 S704 M1000 R1042 R1055 (SW1) JF56 JF58 R1032 R1031 JF55 R1019 Q1002 Q1003 R1013 R1037 S702 LP701 (SWRC) (RC) R1015 S701 D1002 D1001 (ST) (OPC) D703 D702 C799 D701 D704 (AA) J196 C704 Q707...
  • Page 18 28JS-74S F7352N1A CRT Unit PWB Component side D1815 VR1801 ESPA¥A K7352BM D1813 C1814 R1832 (G2) R1834 R1831 R1833 D1814 (L3) L1801 C1811 C1826 (K). C1825 (H). F7352N1A CRT Unit PWB Copper side F7352BMN1 VR1801 L1802 R1832 C1814 D1813 R1831 Q1801 TP1801 R1834 R1841...

  • Page 19: Component Location Tables

    28JS-74S COMPONENT LOCATION TABLES F7353N0D Digital Module Unit PWB Component side Copper side 5HI 1R <XP 5HI 1R <XP 5HI 1R ;XP <XP 5HI 1R <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP     '   5   &...
  • Page 20 28JS-74S F7351N1A Mother Unit PWB Component 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 21 28JS-74S F7351N1A Mother Unit PWB Component 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 -       4   5   6...
  • Page 22 28JS-74S F7351N1A 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 23 28JS-74S F7351N1A Mother Unit PWB F7352N1A Copper side CRT Unit 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 5HI 1R ;XP <XP 4   5   5   5   5  ...

  • Page 24: Chassis Layout

    28JS-74S CHASSIS LAYOUT PWB A- Mother Unit, F7351N1...
  • Page 25 28JS-74S PWB B- CRT Socker Unit, F7352N1A VR1801 (G2) TP1801 (L3) (K). (H). PWB C- Digital Module Unit, F7353N0D X6001 IC6006 X6002 IC6007 IC6001 IC6003 (VI) (YA) (YB)

  • Page 26: Schematic Diagrams

    28JS-74S 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. µ...
  • Page 27 28JS-74S Red Output Green Output Blue Output Video Output +12V E-W Output V Switch V Control St-By Vp (Primary) Vertical Input E-W Control 2 Inner Correction Vertical+Input H Control...
  • Page 28 28JS-74S 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 H Protection IF Video Output V Protection...
  • Page 29 28JS-74S 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 OSD Blanking EPROM Data D3 SCL0 EPROM Address A3 SDA0...
  • Page 30 28JS-74S SDA33 SCL 33 Video Out Processor Xtal In 6 MHz Xtal Out 6 MHz Xtal In 24.576 MHz Xtal Out 24.576 MHz Xtal In 20.25 MHz Xtal Out 20.25 MHz...
  • Page 31 28JS-74S Schematic Diagram of CRT Unit (F7352N1A)
  • Page 32 28JS-74S Schematic Diagram of Digital Module Unit (F7353N0D) +3.3V +2,5VSTBY +3.3V +3.3VSTBY R6016 R6017 R6055 IC6003 (1%) M24128 Q6003 Q6002 C6001 C6006 R6008 BC847B BC847B R6009 470uF 100nF TX0243 TX0243 R6056 (6.3V) D6002 (1%) D6015 C3V9 DX0551 EX0542BM D6014 D6004 BAS85 BAS85 IX1883...
  • Page 33 Hasta INFO 123 Module 18-06-2002 Hasta INFO 122 12-06-2002 Hasta INFO 113 FECHA 26-07-2002 SHARP ESCALA Digitally signed by Emili Sanz Hernandez Digitally signed by Castillo, Fco. 11-06-2002 Hasta INFO 111 Digitally signed by XAVIER RIBERA cn=Castillo, Fco., ou=SEES, o=Engineering Dept., c=ES...
  • Page 34 28JS-74S Page 36 Schematic Diagram of Mother Board Unit (F7351N1A) LEDOPC...
  • Page 35 28JS-74S Page 37 Schematic Diagram of Mother Board Unit (F7351N1A) STBY HOUT...
  • Page 36 28JS-74S SCHEMATIC DIAGRAM OF MOTHER BOARD UNIT (F7351N1A) PROT HEADR HEADL SC2OUTR SC2OUTL SC1OUTR SC1OUTL MUTE HEADR HEADL...
  • Page 37 28JS-74S 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 ALCLOCK...

  • Page 38: Block Diagram

    28JS-74S BLOCK DIAGRAM...

  • Page 39: Troubleshooting Tables

    28JS-74S TROUBLESHOOTING TABLES 7+( +25,=217$/ 67$*( 67$57 83 %87 7+( 3,&785( 25 6281' ,6 127 &255(&7 'RHV LW DSSHDU 3LFWXUH ,V WKHUH 6QRZ ,V WKHUH 3LFWXUH RQ VFUHHQ E\ YDU\LQJ WKH <HV 1RLVH RQ VFUHHQ" RQ VFUHHQ" * 3RWHQWLRPHWHU " <HV <HV &KHFN WKH VHQVH...
  • Page 40 28JS-74S 7+( +25,=217$/ 67$*( 67$57 83 %87 ,7 *2(6 72 67%< $*$,1 9(57,&$/ 67$*( 3527(&7,21 $&76 $UH WKHUH 9 VLJQDO DW 3LQ   <% " 5HYLHZ 'LJLWDO 0RGXOH <HV ',*,7$/ 02'8/( WURXEOHVKRRW WDEOH  $UH WKHUH ±9 LQ ,& ,&" &KHFN YROWDJH DW & DQG <HV & ,& ,& DQG SHULSKHUDO SDUWV...
  • Page 41 28JS-74S ',*,7$/ 02'8/( <HV ,V WKH VWHUHR OHG IODVKLQJ" &KHFN WKH ,&V 6XSSO\ $UH WKHUH 9 DW 3LQ RI <%  $IWHU UHPRYLQJ WKH 'LJLWDO 9 DW 3LQ RI <$  0RGXOH FKHFN WKDW WKH 9 DW 3LQ RI <$  3RZHU 6XSSO\ ZRUNV SURSHUO\ 9 DW 3LQ RI <$ "...
  • Page 42 28JS-74S 7+( 79 6(7 '2(6 127 67$57 83 ,V WKH <HV &KHFN WKH ',*,7$/ 02'8/( 6WHUHR /HG WURXEOHVKRRWLQJ WDEOH )ODVKLQJ" 5HPRYH 'LJ 0RGXOH DQG FKDQJH 3RZHU 6XSSO\ FRQGLWLRQ IURP VWDQGE\ WR RSHUDWLRQ VKRUWFLUFXLW %( RI 4 <HV WKHUH 9 LQ &"...
  • Page 43 28JS-74S $IWHU VKRUWFLUFXLWLQJ $IWHU VKRUWFLUFXLWLQJ <HV <HV 'UDLQ6RXUFH RI 4 3LQ DQG  RI ,& DUH GRHV WKH 79 VHW PRUH WKDQ 9 DW &" VWDUWXS" &KHFN 4 &KHFN ,& DQG 5HIHU WR 7+( +25,= 67$*( SHULSKHUDO SDUWV RI 67$57 83 %87 7+( 3,&785( VHFRQGDU\ FLUFXLW 25 6281' ,6 127 &255(&7 WURXEOHVK WDEOH LI LW LV QHFHVVDU\...

  • Page 44: Ics Additional Information

    28JS-74S ICs ADDITIONAL INFORMATION TDA9885/V3 (IC201) 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 good intermodulation figures, reduced harmonics, reference QSS mixer able to operate in high excellent pulse response)
  • Page 45 28JS-74S TDA9885/V3 (IC201) Block Diagram...
  • Page 46 28JS-74S TDA9885/V3 (IC201) Features SYMBOL DESCRIPTION TAGC tuner AGC output 4 MHz crystal or reference input VAGC VIF-AGC for capacitor; note 1 CVBS video output AGND analog ground VPLL VIF-PLL for loop filter supply voltage (+5 V) AFC output output 2 (open-collector) SIF1 SIF differential input 1 SIF2...
  • Page 47 28JS-74S TDA9885/V3 (IC201) Application Circuit...
  • Page 48 28JS-74S MSP3400G (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 Output SCART4 Select MONO SCART2 Pinning SC2_IN_L SC2_IN_R SC3_IN_R SC3_IN_L...
  • Page 49 28JS-74S 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- ORDERING NUMBER: TDA7480L sembled in Power DIP package specially de- signed for high efficiency applications mainly for...

  • Page 50: Electrical Characteristics

    28JS-74S TDA7480L (IC501) Electrical Characteristics = ±14V; R (Refer to the test circuit, V = 8Ω; R = 50Ω; = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; T = 25°C unless otherwise specified.) Symbol Parameter Test Condition Min.
  • Page 51 28JS-74S TDA7480L (IC501) ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit ±20 DC Supply Voltage Storage and Junction Temperature –40 to 150 °C Maximum Voltage Across VFREQ (Pin 9) FREQ Operating Temperature Range -20 to 70 °C ±1.8 Maximum ESD on Pins Rth with "on board"...
  • Page 52 28JS-74S TDA6109JF (IC1801) Block Diagram V DD handbook, full pagewidth MIRROR 1 MIRROR 5 TDA6109JF CASCODE 1 3× MIRROR 4 V oc(3), 9, 8, 7 CURRENT 1× V oc(2), SOURCE V oc(1) 1× THERMAL PROTECTION DIFFERENTIAL CIRCUIT REFERENCE STAGE V i(1) , 1, 2, 3 V i(2) , MIRROR 3...
  • Page 53 28JS-74S TDA6109JF (IC1801) Characteristics = −20 to +150 °C; V = 25 °C; V Operating range: T = 180 to 210 V. Test conditions: T = 200 V; ⁄ = 10 pF (C consists of parasitic and cathode capacitance); R = 18 K/W oc(1) oc(2)
  • Page 54 28JS-74S TDA6109JF (IC1801) Characteristics SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT cathode output rise time = 50 to 150 V square wave; r(oc) 10% output to 90% output f < 1 MHz; t = 40 ns (pins 7, 8 and 9) (pins 1, 2 and 3);...
  • Page 55 28JS-74S SDA5550 (IC6001) Block Diagram 6 hy‚tÃHˆ‘ Tyvpr… 0HPRU\ ([WHQVLRQ 6WDFN 6p„ˆv†v‡v‚ DS6H !'Y' Q…‚t…h€ÃSPH !$%Y' !'FY' 6p„ˆv†v‡v‚Ãv‡r…shpr v‡r…shpr Memory Extension Unit YS6H 8hƒ‡ˆ…rÃp‚‡…‚y H'$ T TS6H %F‘'iv‡ Counter 0 Qr…vƒur…hy 7ˆ† Core 7ˆ† 6…iv‡r… Counter 1 D‡r…shpr Interrupt Q‚…‡ÃG‚tvp Controller &KDUDFWHU %FY'...
  • Page 56 28JS-74S SDA5550 (IC6001) Logic Symbol Application Diagram...
  • Page 57 28JS-74S SDA9380 (IC6006) Block Diagram φ2 φ2 φ2 φ2 VBLO PROTON SWITCH D/A HPROT VPROT PROTECTION I²C H-OUT START UP BSOIN RESN V-OUT TEST CONTROL FH1_2 VSYNC EW-OUT HSYNC CLEXT CLKI IBEAM PW/PH-CORR HSAFE H35K H38K AVERAGE BEAM LIMITER RGB 2 CLAMP MATRIX BLACK...

  • Page 58: Pin Configuration

    28JS-74S SDA9380 (IC6006) Application Circuit Diagram VSYNC HSYNC IBeam UB Sense B+ Sense V-Sawtooth +3.3 V -V-Drive +V-Drive E/W-Parabola H-Flyback +3.3 V +3.3 V +3.3 V 100n 100n 100n +3.3 V 20 19 +5 V BSOIN VSYNC IBEAM B+ Control_1 PROTON H38K 100n...
  • Page 59 28JS-74S 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 Switching between internal (L) and external clock (H) *) CLEXT I/TTL TEST I/TTL Switching between normal operation (TEST=L) and test mode (TEST=H: pins 4, 12, 13, 14, 15, 17, 49, 50, 63, 64 are additio- nal test pins)
  • Page 60 28JS-74S SDA9380 (IC6006) Pin Description Pin No. Name Type Description Reference voltage VREFH VBLO Q/TTL Vertical blanking output VREFN Ground for VREFH Reference current input VREFC Dark current input for cut off and white level control VDD(A4) Analog supply Y/R 0 Luminance or R input U signal or G input U/G 0...
  • Page 61 28JS-74S VSP94x2A (IC6007) Block Diagram...
  • Page 62 28JS-74S VSP9402A (IC6007) Pin List pin 9402/32 9412/42 I/O 9402/32 9412/42 remark...
  • Page 63 28JS-74S VSP9402A (IC6007) Pin List pin 9402/32 9412/42 I/O 9402/32 9412/42 remark...
  • Page 64 28JS-74S VSP9402A (IC6007) Pin List 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 65 28JS-74S VSP9402A (IC6007) Application Circuit (Example) µ µ µ µ µ µ µ µ µ µ µ...

  • Page 66: Parts Listing

    28JS-74S 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 67 28JS-74S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( &(5$0,& ),/7(56 75$16)250(56 &$3$&,7256 3$&.$*(' &,5&8,76 &2,/6...
  • Page 68 28JS-74S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'(...
  • Page 69 28JS-74S 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 70 28JS-74S 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...
  • Page 71 28JS-74S 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 0,6&(//$1(286 3$576 3:%& ',*,7$/ 02'8/( ,17(*5$7(' &,5&8,76 75$16,67256 ',2'(6 3:%% &57 81,7 ,17(*5$7(' &,5&8,76 75$16,67256 ',2'(6 3$&.$*(' &,5&8,76 &2,/6 &2,/6 &$3$&,7256 &$3$&,7256...
  • Page 72 28JS-74S 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 73 28JS-74S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( &$%,1(7 3$576 -666 6,/9(5 &$%,1(7 0,6&(//$1(286 3$576 1.2 1.5 1.6 &$%,1(7 3$576...

  • Page 74: Servicing Notes

    28JS-74S SERVICING NOTES 1. How to retrieve the IC6002 (Flash Memory). 1.1.- Desoldering the Shield Case Cover. 1.2.- Introduce the screwdriver through the hole. 1.3.- Insert the screwdriver between the IC6002 and its socket. Push up the IC6002 with the screwdriver as in Figure 16. 1.4.- Retrieve the IC6002.
  • Page 75 28JS-74S 2. How to retrieve the IC6002 with pincers (Flash Memory). 2.1.- Desoldering the Shield Case Cover. 2.2.- Introduce the pincers into the hole. 2.3.- Insert the pincers and take hold the IC6002. Pick up the IC6002 with the pincers as in Figure 18. 2.4.- Retrieve the IC6002.
  • Page 76 28JS-74S 3. How to rewrite data in NVM. The NVM (Non Volatile Memory) is a read/write device which function is to keep data even in the case of TV set is switched off. Part of these data is recovered every time the TV is switched on, and, of course, if user makes any change in the user settings (i.e brightness, contrast, etc..).
  • Page 77 28JS-74S 4. Packing of the Set & Accessories Pack-ad SPAKX4055BMZZ Wrapper SPAKP2006BMZZ Carton Box SPAKC5482BMN2 Batteries UBATU0013TAZZ Operation Manual Set R/C Battery Cover GCOVHA009WJSA Remote Control RRMCG1071BMSA...

  • Page 78: Source Of Documentation

    28JS-74S SOURCE OF DOCUMENTATION 1. TDA 9885/V3, Philips Data Sheet:TDA9885/V3; TDA9886/V3. I C-bus controlled single/multistandard alignment-fee IF-PLL. Objective specification. 2001 Mar 31. 2. MSP3410G, Micronas Data Sheet: Preliminary data sheet: “MSP 34x0G Multistandard Sound Processor Family with Virtual Dolby Surround”, Edition March 5, 2001 (6251-476-4PD).
  • Page 79 28JS-74S Notes:...
  • Page 80 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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