Sharp SX68JS10 Service Manual
  1. Manuals
  2. Brands
  3. Sharp Manuals
  4. TV
  5. SX68JS10
  6. Service manual
Sharp SX68JS10 Service Manual

Sharp SX68JS10 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
FEATURES .................................................................................................................................................... 2
ELECTRICAL SPECIFICATIONS .................................................................................................................. 2
IMPOTANT SERVICE NOTES ....................................................................................................................... 3
ADJUSTMENT PRECAUTION ....................................................................................................................... 4
SERVICE ADJUSTMENT .............................................................................................................................. 8
TROUBLE SHOOTING TABLE .................................................................................................................... 17
SOLID STATE DEVICE BASE DIAGRAM ................................................................................................... 22
WAVEFORMS .............................................................................................................................................. 23
CHASSIS LAYOUT ...................................................................................................................................... 24
BLOCK DIAGRAM ....................................................................................................................................... 26
DESCRIPTION OF SCHEMATIC DIAGRAM ............................................................................................... 30
SCHEMATIC DIAGRAM .............................................................................................................................. 31
PRINTED WIRING BOARD ASSEMBLIES .................................................................................................. 42
REPLACEMENT PARTS LIST ..................................................................................................................... 51
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
MODEL
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. SP-91
SX68JS10
SX68JS10
SX68JS10
S79L8SX68JS10
Page

Advertisement

Table of Contents
loading

Related Manuals for Sharp SX68JS10

Summary of Contents for Sharp SX68JS10

  • Page 1: Table Of Contents

    SX68JS10 SX68JS10 SERVICE MANUAL S79L8SX68JS10 COLOUR TELEVISION Chassis No. SP-91 SX68JS10 MODEL In the interests of user-safety (Required by safety regula- tions in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

  • Page 2: Features

    SX68JS10 FEATURES PAL-B/G. and AV NTSC Receiving System. Component input Terminal(Rear). Twin Buss Reflex SP Box. Double Dynamic Picture Circuit. CATV Ready. PAL/NTSC Digital-Comb Filter. Sound Spatializer. Aperture Control Circuit. English/Chinese/Russian/French/Arabic/Malay 6 Language OSD. IGR-B/G. Super Flat Picture Tube. CTI SRT Circuit.

  • Page 3: Impotant Service Notes

    SX68JS10 IMPOTANT SERVICE NOTES Maintenance and repair of this receiver should be done by qualified service peronnel only. SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage system, remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead.

  • Page 4: Adjustment Precaution

    SX68JS10 ADJUSTMENT PRECAUTION The model is a mixture of the adjustment items of I C BUS-CONTROL and the existing analog adjustment. Moreo- ver, since the adjustment with I C BUS-CONTROL is composed of the items which are set with the initial values (preset values) alone and the data variable items, refer to the following.
  • Page 5 SX68JS10 SERVICE MODE The service key selects the service mode. (Refer to the attached table.) Select the item with CH UP/DOWN key, and change the data with VOL UP/DOWN key. Moreover, in the service mode, the item can be directly selected by entering the following key.
  • Page 6 SX68JS10 Data at Address 00H thru 03H of E PROM are read during shift to the service mode. If any data is different from the following, E PROM will be initializes as shown in the table. 00H : 23 01H : 77...
  • Page 7 SX68JS10 INITIAL SETTING AT FACTORY SKIP ON (POS 0), OFF (POS 1~99) Image system AUTO (All POS) IGR forcible FM (All POS) IGR ST STEREO (All POS) IGR DS MAIN (All POS) Last POWER TV/AV Last POS FB POS SAVE...

  • Page 8: Service Adjustment

    SX68JS10 SERVICE ADJUSTMENT PIF CHECK ADJUSTMENT Adjustment part Adjusting procedure and conditions Waveform and others 1 E-12CH (PAL Colour Bar) is received. RF-AGC Note: If the impedance converter of Electric field strength: 54 ± 1dBµV (75Ω Open) Cut-in adjustment 50/75 is not used at the electric 2 Connect the oscilloscope to TP210 as shown (Already preset.)
  • Page 9 SX68JS10 PAL CHROMA ADJUSTMENT Adjustment part Adjusting procedure and conditions Waveform and others 1 E-12CH(PAL colour bar) is received. 1-1 SUB-COLOUR 2 Make the image normal with the remote con- C bus adjust- Cy G ment (RF signal) troller. 3 Connect the oscilloscope to TP3802. (10:1 probe is used.)
  • Page 10 SX68JS10 SOUND LEVEL ADJUSTMENT Adjustment part Adjusting procedure and conditions Waveform and others 1 Receive E-12ch (PAL colour bar). Signal con- SUB VOL (Bus Note: adjustment) tent: 400Hz 100% Mod. * SPATIALIZER OFF 2 Connect the probe of the meter (*) to (SI) con- * S-Normal state nector.
  • Page 11 SX68JS10 CUT OFF, BKGD ADJUSTMENT METHOD Adjustment part Adjusting procedure and conditions Waveform and others 1 Receive E-5CH (Monoscope pattern). CRT CUT OFF 2 Select P-NORM with the remote controller. Service mode 3 Turn on the service SW, and select the CUT...
  • Page 12 SX68JS10 SUB CONT SUB-BRIGHT ADJUSTMENT Adjustment part Adjusting procedure and conditions Waveform and others 1 Receive E-5CH (Monoscope pattern) with MAX BEEM R1633 standard mode. 2 Make the image normal with the remote con- troller. 3 Connect the beam ammeter between TP1601 and TP1602.
  • Page 13 SX68JS10 HORIZONTAL/VERTICAL CIRCUIT ADJUSTMENT Adjustment part Adjusting procedure and conditions Waveform and others Adjust the overscan to 8.5% ± 0.5%. (E-5) V-AMPLITUDE 50 The receiving channel in ( ) are the V-LINEARITY 50Hz Adjust the linearity to the best. following signals.
  • Page 14 SX68JS10 FUNCTION OPERATION CHECK (1) (VIDEO AND AUDIO) Check item Adjusting procedure and conditions Waveform and others 1 Receive E-5CH. CONTRAST 2 In P-mode, select CONTRAST. 3 The contrast must be varied with UP/DOWN. 1 Receive J-13CH. COLOUR 2 In P-mode, select COLOUR.
  • Page 15 SX68JS10 FUNCTION OPERATION CHECK (2) (VIDEO AND AUDIO) Check item Adjusting procedure and conditions Waveform and others 1 When receiving the E-12CH PAL colour bar, 11 COLOUR SYSTEM check that the colour system can receive in the PAL mode only and that colour is reproduced normally.
  • Page 16 SX68JS10 A/V INPUT/OUTPUT CHECK Check item Adjusting procedure and conditions Waveform and others 1 Receive E-12CH colour bar (colour bar audio Video output check 400Hz 100% MOD of 100% white). 2 The video output must be within the specified Audio output range of 1.0Vp-p ±...

  • Page 17: Trouble Shooting Table

    SX68JS10...
  • Page 18 SX68JS10...
  • Page 19 SX68JS10...
  • Page 20 SX68JS10...
  • Page 21 SX68JS10...

  • Page 22: Solid State Device Base Diagram

    SX68JS10 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW VHiTC9090AN-1 VHiLH64256C-1 VHiNJM2284M-1 VHiTA8772AN-1 RH-iX3275CEN2 VHiAN7396K/-1 RH-iX3323CEZZ VHiTDA9808T-1 VHiTA1229N/-1 VHiTDA9874H-1 RH-iX2451CEZZ VHiTA1241AN-1 VHiNJM2284M-1 RH-DX0083GEZZ RH-FX0008GEZZ VHiM24C08B/-1 VHiAN5385K/-1 VHiMiP0253/-1 VHiBA7655AF-1 VHiM62334FP-1 VHiNJM2168M-1 VHiNJM2243M-1 VHiNJM2534M-1 VHiNJM4560M-1 VHiNJ78L09U-1 VHiNJ78L12U-1 VHiTA1218AN-1 SIDE VIEW BASE COLLECTOR CATHODE...

  • Page 23: Waveforms

    SX68JS10 WAVEFORMS...

  • Page 24: Chassis Layout

    SX68JS10 CHASSIS LAYOUT...
  • Page 25 SX68JS10...

  • Page 26: Block Diagram

    SX68JS10 BLOCK DIAGRAM MAIN UNIT BLOCK DIAGRAM...
  • Page 27 SX68JS10...
  • Page 28 SX68JS10 POWER/CRT/IGR UNIT BLOCK DIAGRAM...
  • Page 29 SX68JS10...

  • Page 30: Description Of Schematic Diagram

    SX68JS10 DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: NOTES: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE 1. The unit of resistance “ohm” is omitted. REPLACING PARTS. (K = 1000 ohms, M = Meg ohm). 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS 2.

  • Page 31: Schematic Diagram

    SX68JS10 SCHEMATIC DIAGRAM Infrared Remote Control Unit NOTE: The parts here shown are supplied as an assembly but not independently.
  • Page 32 SX68JS10 Tuner (TU200) å VTUVTBT6ED265 NOTE: The parts here shown are supplied as an assembly but not independently.
  • Page 33 SX68JS10 CRT UNIT...
  • Page 34 SX68JS10 MAIN UNIT(1)
  • Page 35 SX68JS10...
  • Page 36 SX68JS10 MAIN UNIT(2)
  • Page 37 SX68JS10...
  • Page 38 SX68JS10 POWER UNIT...
  • Page 39 SX68JS10...
  • Page 40 SX68JS10 IGR UNIT...
  • Page 41 SX68JS10 - M E M O -...

  • Page 42: Printed Wiring Board Assemblies

    SX68JS10 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN UNIT (WIRING SIDE)
  • Page 43 SX68JS10...
  • Page 44 SX68JS10 PWB-A: MAIN UNIT (WIRING SIDE) (CHIP PARTS)
  • Page 45 SX68JS10...
  • Page 46 SX68JS10 PWB-B: POWER UNIT...
  • Page 47 SX68JS10...
  • Page 48 SX68JS10 PWB-C: CRT UNIT...
  • Page 49 SX68JS10 PWB-D: IGR UNIT (WIRING SIDE) PWB-D: IGR UNIT (WIRING SIDE) (CHIP PARTS)
  • Page 50 SX68JS10 - M E M O -...

  • Page 51: Replacement Parts List

    SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code IC1000 RH-iX3275CEN2 R IX3275CEN2 REPLACEMENT PARTS LIST IC1001 VHiM24C08B/-1 R M24C08B IC1002 VHiPST994C/-1 R PST994C PARTS REPLACEMENT IC1003 VHiM62334FP-1 R M62334FP IC1300 VHiTDA7482/-1 R TDA7482 IC1301 VHiTDA7482/-1...
  • Page 52 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code Q5411 VS2SD601A//-1 R SD601A PACKAGED CIRCUITS X800 RCRSB0278CEZZ R Crystal, CRSB0278CE, DIODES AND LED’S 4.43MHz D200 RH-EX0260TAZZ R Zener Diode X801 RCRSB0277CEZZ R Crystal, CRSB0277CE, D201 RH-EX0260TAZZ R Zener Diode 3.58MHz...
  • Page 53 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C309 VCEA0A1CW106M R 10 16V Electrolytic C392 VCKYCY1HF103Z R 0.01 50V Ceramic C310 VCEA0A1CW106M R 10 16V Electrolytic C393 VCEA0A1CW106M R 10 16V Electrolytic C311 VCEA0A1CW106M R 10...
  • Page 54 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C808 VCEA0A1HW225M R 2.2 50V Electrolytic C1018 VCKYCY1HF103Z R 0.01 50V Ceramic C809 RC-EZ1217CEZZ R 470 16V Electrolytic C1019 VCEA0A1HW105M R 1 50V Electrolytic C810 VCKYCY1HF103Z R 0.01...
  • Page 55 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C5425 VCCCCY1HH220J R 22p 50V Ceramic R204 VRS-CY1JF123J R 12k 1/16W Metal Oxide C5426 VCCCCY1HH220J R 22p 50V Ceramic R205 VRS-CY1JF472J R 4.7k 1/16W Metal Oxide C5427...
  • Page 56 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R369 VRD-RA2EE561J R 560 1/4W Carbon R457 VRS-CY1JF223J R 22k 1/16W Metal Oxide R370 VRD-RA2EE561J R 560 1/4W Carbon R458 VRS-CY1JF562J R 5.6k 1/16W Metal Oxide R371...
  • Page 57 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R843 VRS-CY1JF103J R 10k 1/16W Metal Oxide R1054 VRS-CY1JF223J R 22k 1/16W Metal Oxide R844 VRS-CY1JF101J R 100 1/16W Metal Oxide R1055 VRS-CY1JF101J R 100 1/16W Metal Oxide...
  • Page 58 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R5420 VRS-CY1JF102J R 1k 1/16W Metal Oxide Q1601 VS2SD2581//1E R 2SD2581 R5421 VRS-CY1JF102J R 1k 1/16W Metal Oxide Q1602 VS2SA1015Y/1E R 2SA1015Y R5422 VRS-CY1JF473J R 47k 1/16W Metal Oxide...
  • Page 59 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C701 VCFYSB2EB224K R 0.22 250V M.Polypro C1610 VCFPPC2DB274J R 0.27 200V C702 RC-EZ0689CEZZ R 680 400V Electrolytic MetalIzed Polypro Film C703 VCQPSC2JA333K R 0.033 630V Mylar C1611 VCFPPC2DB274J R 0.27...
  • Page 60 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1515 VRD-RA2BE124J R 120k 1/8W Carbon FB1701 RBLN-0037CEZZ R Balun, BLN-0037CE R1516 VRD-RA2BE124J R 120k 1/8W Carbon FB1702 RBLN-0037CEZZ R Balun, BLN-0037CE R1517 VRD-RA2BE125J R 1.2M 1/8W Carbon...
  • Page 61 SX68JS10 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C3817 VCEA0A2EW106M R 10 250V Electrolytic SC3802 QTiPM0083CEZZ R Tip C3818 VCEA0A1CW227M R 220 16V Electrolytic SC3804 QTiPM0083CEZZ R Tip C3822 VCEA0A1CW106M R 10 16V Electrolytic LHLDZ1759CEKZ...
  • Page 62 R2346 VRS-CY1JF102J R 1k 1/16W Metal Oxide GDORF0180PESA A Door R2348 VRS-CY1JF221J R 220 1/16W Metal Oxide HBDGB3120CESB J Badge, "SHARP" R2349 VRS-CY1JF393J R 39k 1/16W Metal Oxide HDECA0071PESB J Punching Plate A R2350 VRS-CY1JF152J R 1.5k 1/16W Metal Oxide...

Table of Contents