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File name 28JS-74S CH.GA-200.pdf

28JS-74S SERVICE MANUAL SE0028JS74S00 Issued :30th July 2002 GA-200 CHASSIS PAL / SECAM BG SYSTEM COLOUR TELEVISION MODEL 28JS-74SS 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 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 SCHEMATIC DIAGRAMS ... 26 BLOCK DIAGRAM ... 38 TROUBLESHOOTING TABLES ... 39 ICs ADDITIONAL INFORMATION ... 44 PARTS LISTING ... 66 SERVICING NOTES... 74 SOURCE OF DOCUMENTATION ... 78 SHARP CORPORATION 1 This document has been published to be used for after sales service only. 28JS-74S 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). 2 28JS-74S ELECTRICAL SPECIFICATIONS ·Power Input ... 220V-240 Volts AC 50Hz ·Power Consumption Normal Operation (Method IEC60107) ... 84W Stand-by Operation ...1.5W ·Focus ... High Bi-Potential Electrostatic ·Sweep Deflection ... Magnetic ·Picture Intermediate Frequency... 38.9MHz ·Sound Carrier Trap... 33.4MHz ·Adjacent Sound Carrier Trap ... 40.4MHz ·Audio Power Output Rating (MPO) / Impedance Internal Left Speaker ... 10W, 7 Internal Right Speaker ... 10W, 7 ·Speakers Left / Right ... 12 x 6cm ·Convergence (Maximum Misconvergence) Static (Centre) between any two colours ... 0.08 Dynamic after static equals zero Within 10cm (4") circle ... 0.12 10-25cm (4-10" ) circle ... 0.20 Everywhere else ... 0.28 cm cm cm cm ·Adjacent Picture Carrier Trap... 31.9MHz . ·Aerial Input Impedance VHF/UHF ... 75 ohm Unbalanced ·Tuning Ranges... 48.25 MHz thru 855.25 MHz VHF: E2-E12 CH / S1 - S41 CH (Hiperband) UHF: E21 - E69