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Sharp 70GS-61SC Service Manual
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Sharp 70GS-61SC Service Manual

Sharp 70GS-61SC Service Manual

Pal system colour television
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ELECTRICAL SPECIFICATION.......................3
IMPORTANT SERVICE NOTES.......................4
CONTROL & TERMINALS................................5
ADJUSTMENTS PROCEDURES.....................7
STEREO LED FLASHING CODES.................11
PRINTED WIRING BOARDS..........................12
SHARP CORPORATION
SERVICE MANUAL
PAL SYSTEM COLOUR TELEVISION
70GS-61SC
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
COMPONENT LOCATION TABLES................16
CHASSIS LAYOUT..........................................20
ICs ADITIONAL INFORMATION.....................21
SCHEMATIC DIAGRAM..................................31
PARTS LISTING..............................................38
PACKING OF THE SET & ACCESSORIES....46
1
70GS-61SC
SES70GS61SC00
Issued: 17th October '01
GA-10
CHASSIS
This document has been published to
be used for after sales service only.

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Summary of Contents for Sharp 70GS-61SC

  • Page 1: Table Of Contents

    70GS-61SC SERVICE MANUAL SES70GS61SC00 Issued: 17th October ‘01 GA-10 CHASSIS PAL SYSTEM COLOUR TELEVISION 70GS-61SC 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.
  • Page 2 70GS-61SC 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 Specification

    70GS-61SC ELECTRICAL SPECIFICATIONS •Power Input ....220V-240 Volts AC 50Hz •Convergence Static (Centre) .. between any two colours Dynamic ....after static equals zero •Power Consumption •Focus ....High Bi-Potential Electrostatic Normal Operation ........87W •Sweep Deflection ....... Magnetic Stand-by Operation ........3W •Picture Intermediate frequency ..

  • Page 4: Important Service Notes

    70GS-61SC 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 70GS-61SC REMOTE CONTROL 1. Stand-by ON/OFF switch (TV) Video 2. Power ON / OFF switch (VCR) 3. Digit buttons 0 ∼ 9 4. Flashback button TV/VIDEO Teletext 5. Colour button (green) 6. Colour button (red) 7. Volume Down/Cursor control Left 8.

  • Page 6: Control & Terminals

    70GS-61SC CONTROLS & TERMINALS FRONT TV 1. Main Power On/Off Switch 2. Power Indicator / I / II 3. Program Selector (UP/DOWN) 4. Volume Buttons (UP/DOWN) 5. Remote Control Sensor 6. Sound Indicator 7. Remote Control Indicator 8. DOOR Behind the door 9.

  • Page 7: Adjustments Procedures

    70GS-61SC 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.
  • Page 8 70GS-61SC 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 Amplitude • E-W Width • S Correction • Pin Phase • Vertical Shift •...
  • Page 9 70GS-61SC Corner Symmetry Adjust the Corner Symmetry so that the picture is centred. The effect of this adjustment is shown in figure 7. Note: This adjustment affects to upper and lower sides. • When the volume up button is pressed, side pincushion changes from pincushion to barrel shape.
  • Page 10 70GS-61SC • When the volume down button is pressed the top and bottom scanning decreases and the centre scanning increases. • Press the stand-by button on the remote control to store. Vertical Shift Adjust the Vertical Shift so that the picture is centred.

  • Page 11: Stereo Led Flashing Codes

    DO NOT change any NVM data, unless you have been ad- 1. Unable to read or write into NVM: 66% ON, 33% OFF vised to do so by a Sharp representative. If data is incor- twice and OFF for a second.
  • Page 12 70GS-61SC F7315N6. MOTHER UNIT PWB. Component side. S702 S703 S704 S705 OPC1 M1000 LP701 D1001 VAR1 C701 L701 D701 C737 D702 JF702 C726 C703 D704 C727 C706 C905 R904 C704 C712 C707 POR701 C904 T702 R906 J326 T3.15AH JF64 C798...
  • Page 13 70GS-61SC F7315N6. MOTHER UNIT PWB. Component side. D724 D727 QKITP7315BMN6 Q708 D1001 D1002 L302 (VS) L303 JF702 (AV) IC304 C1052 C915 R337 D901 (SP) C905 R904 R359 C392 C902 C372 C377 C3309 C362 C361 C376 L316 C365 C351 C378 R355...
  • Page 14 70GS-61SC F7315N6. MOTHER UNIT PWB. Copper side. R756 Q706 C380 Q707 D308 C381 R1015 JF39 C390 R755 L317 R1014 R332 R333 C405 R331 J334 C1043 C382 D907 C386 D908 C385 R931 C375 Q910 D309 C360 R353 C397 Q909 C399 R922...
  • Page 15 70GS-61SC F7315N6. MOTHER UNIT PWB. Copper side. R1045 R1044 R1032 R1043 JF21 JF20 R765 R774 R1031 R1030 C1050 R1046 R1017 C1022 R770 C913 R708 R706 D904 R751 Q712 Q1701 R715 D715 R784 R785 D716 Q720 D741 D905 Q705 Q704 R711...
  • Page 16 70GS-61SC MOTHER UNIT (F7315N6) PWB COMPONENT LOCATION TABLES. Component Side. UHI 1R <XP UHI 1R <XP UHI 1R <XP UHI 1R <XP UHI 1R <XP UHI 1R <XP $9   &   &   )  ...
  • Page 17 70GS-61SC MOTHER UNIT (F7315N6) PWB COMPONENT LOCATION TABLES. Component Side Copper Side UHI 1R <XP UHI 1R <XP UHI 1R <XP ref No ref No ref No     5   C1002 230124 142494 C323 145542 55626...
  • Page 18 70GS-61SC MOTHER UNIT (F7315N6) PWB COMPONENT LOCATION TABLES. Copper Side. ref No ref No ref No ref No ref No ref No D1005 192278 101346 D723 163068 67056 J260 198628 60960 83312 144780 235712 34036 Q725 13970 87376 D1006 138938 101092...
  • Page 19 70GS-61SC MOTHER UNIT (F7315N6) PWB COMPONENT LOCATION TABLES. Copper Side. ref No ref No ref No ref No R225 227838 16256 R405 152146 22860 R632 89154 80518 R760 86614 70612 R230 192024 61722 R406 161290 32004 R633 107950 65277 R761...

  • Page 20: Chassis Layout

    70GS-61SC F7315N6. CHASSIS LAYOUT.
  • Page 21 70GS-61SC ICs ADITIONAL INFORMATION: TDA9885 (IC201) QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT supply voltage note 1 4.75 5.00 5.50 supply current −1 dB video at output − µV VIF input signal voltage sensitivity i(VIF)(rms) (RMS value) −...
  • Page 22 70GS-61SC ICs ADITIONAL INFORMATION: TDA9885 (IC201) SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT −3 dB audio frequency bandwidth for − without de-emphasis; AF(−3dB) dependent on loop filter at pin 4 − weighted signal-to-noise ratio of 27 kHz FM deviation; W(audio) 50 µs de-emphasis;...
  • Page 23 70GS-61SC ICs ADITIONAL INFORMATION: TDA9885 (IC201) BLOCK DIAGRAM...
  • Page 24 70GS-61SC ICs ADITIONAL INFORMATION: TDA9885 (IC201) PINNING SYMBOL DESCRIPTION SYMBOL DESCRIPTION VIF1 VIF differential input 1 TAGC tuner AGC output VIF2 VIF differential input 2 4 MHz crystal or reference input output 1 (open-collector) VAGC VIF-AGC for capacitor; note 1 FMPLL FM-PLL for loop filter...
  • Page 25 70GS-61SC ICs ADITIONAL INFORMATION: TDA7480 (IC301, IC302, 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...
  • Page 26 70GS-61SC ICs ADITIONAL INFORMATION: TDA7480 (IC301, IC302, IC501) = ±14V; R ELECTRICAL CHARACTERISTICS (Refer to the test circuit, V = 8Ω; R = 50Ω; = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; T = 25°C unless otherwise specified.)
  • Page 27 70GS-61SC ICs ADITIONAL INFORMATION: MSP3410G (IC303) Loud- Loud- Sound IF1 Pre- speaker speaker processing modulator Sound Sound IF2 Subwoofer Processing Headphone Headphone Sound Processing Prescale SCART1 SCART2 SCART SCART1 Input SCART3 Prescale SCART Select Output SCART4 Select MONO SCART2 Block Diagram of the MSP 34x1G...
  • Page 28 70GS-61SC ICs ADITIONAL INFORMATION: MSP3410G (IC303) Absolute Maximum Ratings Symbol Parameter Pin Name Min. Max. Unit − °C Ambient Operating Temperature − −40 °C Storage Temperature −0.3 First Supply Voltage AHVSUP SUP1 −0.3 Second Supply Voltage DVSUP SUP2 −0.3 Third Supply Voltage...
  • Page 29 70GS-61SC ICs ADITIONAL INFORMATION: VCT3811 (IC1001) VCT 38xx Display RGBOUT Processor Video Comb Panorama Video Color Front-end Scaler Back-end Filter Decoder RGBIN Pict.Improv. VOUT VSUPAB GNDAB AOUT MSync Audio Color, Prio VSync C Master 8-bit PWM 24 kB ROM 14-bit PWM...
  • Page 30 70GS-61SC ICs ADITIONAL INFORMATION: VCT3811 (IC1001) VSUPP3 GNDD GNDP3 VSUPD HOUT CLK20 TEST FBLIN VPROT SAFETY VBCLK HFLB 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73...
  • Page 31 70GS-61SC DESCRIPTION OF SCHEMATIC DIAGRAM NOTE: SAFETY NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. M= Megaohm). 1. DISCONNECT THE AC PLUG FROM THE AC 2. All resistors are 1/8 watt. unless otherwise noted. OUTLET BEFORE REPLACING PARTS.
  • Page 32 70GS-61SC Red output Green output Blue output E/W Output I Sense V St-by V Switch V Control St-by Vp (Primary) Vertical Input E/W Correction V inner correction Vertical + input H Control...
  • Page 33 70GS-61SC Vb (Horizontal) Vc (Horizontal) V in Headphone L V in Headphone R V in Speaker L V out Speaker L V out Speaker R V in Speker R X1002 V Flyback Vertical Vertical output Vertical input IF Video output...
  • Page 34 70GS-61SC SCHEMATIC DIAGRAM OF MOTHER UNIT (K7315N6, 00 Version). Page 36 VOUT MUTE PROT HOUT VPROT ALCLOCK...

  • Page 35: Schematic Diagram

    70GS-61SC SCHEMATIC DIAGRAM OF MOTHER UNIT (K7315N6, 00 Version). Page 37 VPROT...
  • Page 36 70GS-61SC SCHEMATIC DIAGRAM OF MOTHER UNIT (K7315N6, 00 Version). PROT HEADR HEADL MUTE STBY HEADR HEADL VOUT...
  • Page 37 70GS-61SC SCHEMATIC DIAGRAM OF MOTHER UNIT (K7315N6, 00 Version). SC2OUTL SC2OUTR SC1IN SC2IN VPROT SC1INR SC1OUTR SC1OUTL SC1INL VOUT ALCLOCK...
  • Page 38 70GS-61SC PART LIST REF No. PARTS DESCRIPTION * SN CODE EX CODE REPLACEMENT PARTS Q 0701 CH-TX0237BMV0 TRT SET RH-TX0237 PREFORM Replacement parts which have special safety characteristics are identi- Q 0702 CH-TX0237BMV0 TRT SET RH-TX0237 PREFORM fied in this manual. Electrical components having such features are iden-...
  • Page 39 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE D 0619 RH-DX0551BMZZ DIODE LL4148 TFK SMD X 0201 RCRSB0201BMZZ CRYSTAL 4 MHZ X 0301 RCRSB0203BMZZ CRYSTAL 18,432 MHZ D 0620 RH-EX0558BMZZ...
  • Page 40 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE C 0309 VCEAGA1AW337M ELEC C 330UF 20% 10V C 0502 VCKYTV1EF334Z CERAM C 330NF 25V 2125SMD C 0310 VCKYTV1HF104Z CERAM C 100NF 50V 2125SMD...
  • Page 41 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE C 0726 VCEAGA1EW228M ELEC C 2200UF 20% 25V R 0213 VRD-RA2HD183J RES 18KOHM 5% 1/2W R 0214 VRD-RA2HD183J RES 18KOHM 5% 1/2W...
  • Page 42 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE R 0413 VRS-TQ2BD680J OX RE 68 OHM 5% 1/8W SMD R 0632 VRS-TV1JD391J 2125 390 OHM 5% 1/10W SMD R 0414 VRS-TV1JD102J...
  • Page 43 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE R 0765 VRS-TQ2BD823J OX RE 82KOHM 5% 1/8W SMD QSOCZ0115SC32 SOCKET IC 32 PIN R 0766 VRS-TV1JD471J 2125 470 OHM 5% 1/10W SMD...
  • Page 44 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE J 0097 RBLN-0037CEZZ BALUN FBA04HA90088-00 T/Y J 0333 VRS-TV1JD000J 2125 0 OHM 5% 1/10W SMD J 0101 VRS-TV1JD000J 2125 0 OHM 5% 1/10W SMD...
  • Page 45 70GS-61SC REF No. PARTS DESCRIPTION * SN CODE EX CODE R 0903 VRS-TV1JD000J 2125 0 OHM 5% 1/10W SMD R 0904 VRD-RA2BE475J RES 4,7MOHM 5% 1/8W R 0905 VRS-TV1JD102J 2125 1KOHM 5% 1/10W SMD R 0906 VRD-RA2HD272J RES 2,7KOHM 5% 1/2W...
  • Page 46 70GS-61SC PACKING OF THE SET Pack-ad S PAKX4055BMZZ Wrapper S PAKP2006BMZZ FRONT S PAKC5482BMN2 Carton Box ACCESSORIES Remote Control Batteries RRMCG1071BMSA UBATU0247AJZZ Operation Manual Set...
  • Page 47 70GS-61SC Q601, Q602 REPLACEMENT NOTES: When Q601 or Q602 requires to be replaced, please consider the following steps in order to avoid damaging any part. 1. Gently unclamp clip from side to side using a screwdriver to remove, as shown on Fig.1 2.
  • Page 48 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.