Service manual

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70GS-62S

MODEL

70GS-62S

DE / GG / IT

SHARP CORPORATION

PAL BG SYSTEM COLOUR TELEVISION

SESG70GS62S00

SERVICE MANUAL

Issued: 30th May ‘01

This document has been published to

be used for after sales service only.

GA-10 CHASSIS

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.

ADJUSTMENTS PROCEDURES......................7

STEREO LED FLASHING CODES..................11

PARTS LISTING..............................................38

CONTENTS

ELECTRICAL SPECIFICATION........................3

IMPORTANT SERVICE NOTES........................4

CONTROL & TERMINALS.................................5

SCHEMATIC DIAGRAM..................................31

PRINTED WIRING BOARDS..........................12

PACKING OF THE SET & ACCESSORIES....46

CHASSIS LAYOUT...........................................16

ICs ADITIONAL INFORMATION.....................21

COMPONENT LOCATION TABLES................16

Summary of content (48 pages)

PAGE 1
70GS-62S SERVICE MANUAL SESG70GS62S00 Issued: 30th May ‘01 GA-10 CHASSIS PAL BG SYSTEM COLOUR TELEVISION MODEL 70GS-62SDE / GG / IT 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 ELECTRICAL SPECIFICATION........................3 IMPORTANT SERVICE NOTES........................4 CONTROL & TERMINALS.................................
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70GS-62S SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Technical Bulletin No. Cause / Solution Part No. Page No. Application 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).
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70GS-62S ELECTRICAL SPECIFICATIONS •Focus ....................... High Bi-Potential Electrostatic •Power Input .................... 220V-240 Volts AC 50Hz •Sweep Deflection ..................................... Magnetic •Power Consumption Normal Operation ...................................87W Stand-by Operation ..................................1W •Picture Intermediate frequency................... 38.9MHz •Sound Carrier Trap................................... 33.4MHz •Adjacent Sound Carrier Trap ......
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70GS-62S 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. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from the CRT cavity connector to the CRT ground tag. This must be carried out with the AC supply disconnected from the receiver.
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70GS-62S REMOTE CONTROL 1. TV Video 2. Power ON / OFF switch (VCR) TV 3. Digit buttons 0 ∼ 9 4. Flashback button Teletext 5. Colour button (green) 6. Colour button (red) 7. Volume Down/Cursor control Left 8. Menu button 20. 3. 1 2 3 TV 4 5 6 Teletext 7 8 9 9. 10. 11. 12. 13. 14. Reveal button List selector Store button Cancel button Top/ Bottom/Full button Reset button Video 15. 16. 17. 18. Rewind/picture search/reverse Play button Pause / Still button Stop button TV 19.
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70GS-62S CONTROLS & TERMINALS FRONT TV 1. Main Power On/Off Switch 2. Power Indicator OPC 3. Program Selector (UP/DOWN) 4. Volume Buttons (UP/DOWN) 8 7 / I / II 6 6 5 CH 4 3 2 5. Remote Control Sensor 6. Sound Indicator 7. Remote Control Indicator 8. DOOR Behind the door 9. Headphone Socket (3.5 mm Ø / 16~600 ȍ) 9 HOW TO OPEN THE DOOR OPC Press the top of the door, opening it slightly. Hook your finger inside and pull open. REAR TV 3 RF Input 1. Antenna terminal 21-pin In/Out 2.
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0GS-62S 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. To enter the service mode, carry out the following procedure. 1. Connect a test pattern to the antenna terminal. 2. Tune the receiver to this signal. 3.
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70GS-62S The following geometry adjustments can be carried out.
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70GS-62S 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. • When the volume down button is pressed, side pincushion changes from pincushion to barrel shape. • Press the stand-by button on the remote control to store. Fig.
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70GS-62S • 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. The effect of this adjustment is shown in figure 13. • When the volume up button is pressed, the picture moves down. • When the volume down button is pressed, the picture moves up. • Press the stand-by button on the remote control to store.
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70GS-62S 4. Once this data has been set, press the stand-by button to store. 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 STEREO LED FLASHING CODES.
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70GS-62S F7315N4. MOTHER UNIT PWB. Component side. 25 S704 S705 OPC1 M1000 + LP701 VAR1 J4 24 J5 S703 + S702 J1 C701 J2 D701 C1019 L701 23 C737 D702 JF702 + JF65 3 D704 TRC C727 GND J16 + C706 C905 C704 C702 F701 FB702 FB701 D703 + C707 J35 J34 + J39 J38 F703 FB703 + J326 J40 1 L3 J67 C732 C901 R738 C731 + S701 D712 D749 R906 (H). T3.
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70GS-62S F7315N4. MOTHER UNIT PWB. Component side. 25 QKITP7315BMN4 24 D1002 7 1 23 L318 C386 R359 C372 IC305 C373 JL1.
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70GS-62S F7315N4. MOTHER UNIT PWB. Copper side.
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70GS-62S F7315N4. MOTHER UNIT PWB. Copper side.
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70GS-62S F7315N4. CHASSIS LAYOUT. PTC UNIT (F7347N0) PWB & COMPONENT LOCATION TABLES. Component Side. 5HI 1R '* 5 5 4 Component Side. Copper Side. 4 F7347BMN0 C1701 + C1702 2 D1702 D1701 D1702 POR1701 K R1701 4 6 IC708 R1704 R1701 1 3 + C1701 R1704 3 Q1701 R1703 JL23 (DG) 3 0 X Y 1 2 2 1 & ' -/ -/ 325 5 Copper Side.
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70GS-62S MOTHER UNIT (F7315N4) PWB COMPONENT LOCATION TABLES. Component Side.
PAGE 18
70GS-62S MOTHER UNIT (F7315N4) PWB COMPONENT LOCATION TABLES.
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70GS-62S MOTHER UNIT (F7315N4) PWB COMPONENT LOCATION TABLES. Copper Side.
PAGE 20
70GS-62S MOTHER UNIT (F7315N4) PWB COMPONENT LOCATION TABLES. Copper Side.
PAGE 21
70GS-62S ICs ADITIONAL INFORMATION: TDA9885 (IC201) QUICK REFERENCE DATA SYMBOL PARAMETER VP supply voltage IP supply current Vi(VIF)(rms) VIF input signal voltage sensitivity (RMS value) GVIF(cr) fVIF CONDITIONS note 1 MIN. TYP. MAX. UNIT 4.75 5.00 5.50 V 52 61 70 mA −1 dB video at output − 60 100 µV VIF gain control range see Fig.10 60 66 − dB vision carrier operating frequencies see Table 28 − 33.4 − MHz − 33.9 − MHz − 38.0 − MHz − 38.9 − MHz − 45.
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70GS-62S ICs ADITIONAL INFORMATION: TDA9885 (IC201) SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT BAF(−3dB) −3 dB audio frequency bandwidth for FM without de-emphasis; dependent on loop filter at pin 4 80 100 − kHz S/NW(audio) weighted signal-to-noise ratio of audio signal 27 kHz FM deviation; 50 µs de-emphasis; vision carrier unmodulated 52 56 − dB AM; m = 54% 45 50 − dB αAM(sup) AM suppression of FM demodulator 50 µs de-emphasis; AM: f = 1 kHz; m = 0.
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18 AGND 20 VP SUPPLY n.c. 13 (1) Not connected for TDA9885. SIF1 23 SIF2 24 VIF1 1 VIF2 2 CBL 16 VAGC VIF-AGC CAGC neg 14 TUNER AGC 9 TOP TAGC VPLL VIF-PLL 19 RC VCO CAGC SIF-AGC OP1 3 OUTPUT PORTS 22 OP2 SCL 11 SDA 10 12 AFC 21 FM-PLL filter FMPLL 4 NARROW-BAND FM-PLL DETECTOR AUDIO PROCESSING AND SWITCHES 4.5 to 6.
PAGE 24
70GS-62S ICs ADITIONAL INFORMATION: TDA9885 (IC201) PINNING SYMBOL PIN DESCRIPTION SYMBOL PIN DESCRIPTION VIF1 1 VIF differential input 1 TAGC 14 tuner AGC output VIF2 2 VIF differential input 2 REF 15 4 MHz crystal or reference input OP1 3 output 1 (open-collector) VAGC 16 VIF-AGC for capacitor; note 1 FMPLL 4 FM-PLL for loop filter CVBS 17 video output DEEM 5 de-emphasis output for capacitor AGND 18 analog ground AFD 6 AF decoupling input for capacitor VPLL 19 VI
PAGE 25
70GS-62S ICs ADITIONAL INFORMATION: TDA7480 (IC301, IC302, IC501) ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC Tstg, Tj DC Supply Voltage VFREQ Maximum Voltage Across VFREQ (Pin 9) Top ESD Operating Temperature Range Storage and Junction Temperature Value Unit ±20 –40 to 150 °C 8 V -20 to 70 °C ±1.8 kV Maximum ESD on Pins Rth with "on board" Square Heatsink vs. copper area.
PAGE 26
70GS-62S ICs ADITIONAL INFORMATION: TDA7480 (IC301, IC302, IC501) ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±14V; RL = 8Ω; RS = 50Ω; Rf = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°C unless otherwise specified.) Symbol Parameter Test Condition Min. Supply Range VOS Output Offset Voltage Play Condition –50 PO Output Power THD = 10% THD = 1% 8.5 6 RL = ∞; NO LC Filter Total Quiescent Current Unit 25 ±16 40 mA +50 mV RL = 4Ω VCC = ±10.
PAGE 27
70GS-62S ICs ADITIONAL INFORMATION: MSP3401G (IC303) Demodulator ADC Sound IF2 Preprocessing Source Select Sound IF1 2 I S1 Prescale I2S2 Loudspeaker Sound Processing DAC Headphone Sound Processing DAC Loudspeaker Subwoofer Headphone I2S SCART1 DAC SCART2 SCART3 SCART DSP Input Select SCART1 ADC Prescale SCART Output Select DAC SCART4 MONO SCART2 Block Diagram of the MSP 34x1G SC2_IN_L SC2_IN_R ASG2 SC3_IN_R ASG1 SC3_IN_L SC1_IN_L ASG4 SC1_IN_R SC4_IN_R VREFTOP SC4_IN_L N
PAGE 28
70GS-62S ICs ADITIONAL INFORMATION: MSP3401G (IC303) Absolute Maximum Ratings Symbol Parameter Pin Name Min. Max. Unit TA Ambient Operating Temperature − 0 701) °C TS Storage Temperature − −40 125 °C VSUP1 First Supply Voltage AHVSUP −0.3 9.0 V VSUP2 Second Supply Voltage DVSUP −0.3 6.0 V VSUP3 Third Supply Voltage AVSUP −0.3 6.0 V dVSUP23 Voltage between AVSUP and DVSUP AVSUP, DVSUP −0.5 0.
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70GS-62S VIN CIN 2 4 3 Video Front-end Comb Filter Panorama Scaler Color Decoder 2 RSW GNDM VRD XREF SENSE HFLB VERT EW PROT HOUT VCT 38xx GNDD VSUPD GNDAF VSUPAF SGND VRT ICs ADITIONAL INFORMATION: VCT3832 (IC1001) 2 Display Processor 3 Video Back-end Pict.Improv.
PAGE 30
70GS-62S ICs ADITIONAL INFORMATION: VCT3832 (IC1001) P35 P36 P34 P37 VSUPP3 GNDP3 P33 GNDD VSUPD HOUT CLK20 VB0 P32 P31 P30 VB1 VB2 TEST FBLIN RIN VB3 VB4 GIN VB5 VB6 BIN VPROT SAFETY HFLB VB7 VBCLK P20 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 97 64 P21 VERT 98 63 P22 EW 99 62 P23 SENSE 100 61 GNDP2 GNDM 101 60 VSUPP2 RSW1 102 59 P24 RSW2 103 58 P25 SVMOUT 104 57 P26 ROUT 105 56 P27 GOUT 106 55 DISINTR
PAGE 31
70GS-62S DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTE: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING. NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. M= Megaohm). 2. All resistors are 1/8 watt. unless otherwise noted. 3. All capacitors are mF, unless otherwise noted (P= mmF). 4. The capacitor with Part No. RC-FZ9XXXBMNJ is designed to with stand 63V. 5.
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70GS-62S 4 Red output 5 Green output 6 Blue output 7 I Sense 8 V St-by 9 E/W Output 10 V Switch 11 V Control St-by 12 Vp (Primary) 13 Vertical Input 14 E/W Correction 15 V inner correction 16 Vertical + input 17 VH 18 H Control 32
PAGE 33
70GS-62S 19 Vb (Horizontal) 20 Vc (Horizontal) 21 V in Headphone L 22 V in Headphone R 23 V in Speaker L 24 V out Speaker L 25 V out Speaker R 26 V in Speker R 27 X1002 28 V Flyback Vertical 29 Vertical output 30 Vertical input 31 IF Video output 33
PAGE 34
7 R779 2M2 2M2 R748 220K R778 R790 270 (1/2W) R703 2K7 22K R701 R753 2K2 Q704 2SA1037 2M2 R754 10K R705 C721 10nF (FZ) D731 DX0045 C711 68nF (250V) FZ0206BM R721 100 (TQ) Q712 2SA1037 R783 220K 47K R782 D717 DX0045 R710 330K (TQ) (1%) 390K (TQ) 3 100K R751 R789 100K R785 100K C704 10nF 250V KZ0029CE D703 RF2005 DX0555 D704 DX0555 RF2005 D707 DX0551 D734 DX0551 R722 R750 22K R715 18K (1%) R773 680K R772 680K (TQ) R749 680K (TQ) .
PAGE 35
Q725 2SC2412 C606 47nF (HB) R727 1K 13 J330, J331,J332, J333, J334, J335, JF78, JF79, L319, R451, R452, J204 ABOLISH PARTS 18 C709 10uF D739 C33 EX0427BM D738 DX0045 R720 15K C710 22nF (FZ) 2M2 (TQ) FOR 7315N4 VERSION R704 100K C738 100nF (FZ) R724 1M D729 1N4937 11 Q715 2SA1037 2M2 (TQ) C0373 - RC-FZ9104BMNJ+ C0388 - RC-FZ4334BMNJ+ C0389 - RC-FZ4334BMNJ+ C0386 - RC-FZ9224BMNJ+ D1003 - RH-EX0551BMZZ* D0307 - RH-EX0413BMZZ* D0308 - RH-EX0413BMZZ* D1015 - RH-EX0045BMZZ* R0657 - RR-XZ
PAGE 36
Page 34 2 1 . 3 270pF C1032 2n2 C1030 C1004 1uF C1005 47uF L1001 1uH (DF) +5V R423 75 (TQ) X1823BM . +5V Q1003 2SC2412 R1037 4K7 22uH L319 C1016 100nF (FZ) C1015 3.3pF X1002 20.25 B0219BM R1004 220 C1008 2n2 C1060 100nF 27 C1014 5pF C382 100nF .
PAGE 37
3 C403 10nF R435 1K R450 22 D403 7V5 EX0412 4 9 K 6 16 D420 C5V6 EX0409 R407 75 D411 C5V6 EX0409 R408 8K2 Q405 2SC2412 R434 1K C521 68nF -13V . 14 C511 2.
PAGE 38
70GS-62S PARTS LISTING 5() 1R 3$576 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 Part List. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended is not permitted. Replacement parts not shown in this service manual may create shock fire, or other hazards.
PAGE 39
70GS-62S 5() 1R 3$576 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
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70GS-62S 5() 1R 3$576 & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & &
PAGE 41
70GS-62S 5() 1R 3$576 & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & &
PAGE 42
70GS-62S 5() 1R 3$576 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
PAGE 43
70GS-62S 5() 1R 3$576 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
PAGE 44
70GS-62S 5() 1R 3$576 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PAGE 45
70GS-62S 5() 1R 3$576 '(6&5,37,21 ' ' ' ' 5+ '; %0== 5+ '; %0== 5+ '; %0== 5+ '; %0== ',2'( %<7 0 7). ',2'( %<* * 7). 60' ',2'( %<* * 7). 60' ',2'( %<* * 7). 60' & & & & & & & & & & & 9&($*$ (: 0 9&.<3% '( = 9&($*$ (: 0 5& )= %019&($*$ &: 0 9&.<79 +) = 9&.<79 +) = 9&&&79 ++ 5+ 9; %0== 5+ 9; %0== 9&.<3$ +% . (/(& & 8) 9 & '( ( = .
PAGE 46
70GS-62S 2 1 1.1 3 3 1.2 1.3 1.5 1.6 1.4 1.
PAGE 47
70GS-62S Batteries UBATU0247AJZZ Remote Control RRMCG1071BMSA Operation Manual Set 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. Check that clip is not deformed when replacing. If deformed press inwards as shown on Fig. 2 Screwdriver FIG.2 Press inwards FIG.1 DOCUMENTATION OF SOURCES. 1.
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70GS-62S No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. SHARP ELECTRONICA ESPAÑA S.A. TV Division Engineering Dept.