Sanyo HT28745 Service Manual

Also see for HT27745: Owner's manual Owner's manual

Contents

Sanyo HT28745 Service Manual Manual pdf 1 page image

ASFILE NO.SERVICE MANUAL Remote Control DigitalColor Television HT28745 (U.S.A.)(CANADA)ORIGINAL VERSIONChassis No. 28745-00NOTE: Match the Chassis No. onthe unit’s back cover withthe Chassis No. in theService Manual.If the Original VersionService Manual ChassisNo. does not match theunit’s, additional ServiceLiterature is required. Youmust refer to “Notices” to theOriginal Service Manualprior to servicing the unit.ContentsSafety Instructions . . . . . . . . . . . . . . . . . . 2Service Adjustments . . . . . . . . . . . . . 3 - 17Service Hints . . . . . . . . . . . . . . . . . . . . . . 18Mechanical Disassemblies. . . . . . . . . . . 19Chassis Electrical Parts List . . . . . . 20 - 36Cabinet Parts List . . . . . . . . . . . . . . . . . . 37Component and Test PointLocations . . . . . . . . . . . . . . . . . . . 38 - 45Block Diagrams . . . . . . . . . . . . . . . . 46 - 51Troubleshooting Flow Charts . . . . . 52 – 54Control Port Function . . . . . . . . . . . . . . . 55Schematic Inserts . . . . . . . . . . . . . . 57 – 72Schematic Notes . . . . . . . . . . . . . . . . . 57Pin Layouts . . . . . . . . . . . . . . . . . . . . . 57Capacitor and Resistor Codes . . . . . . 57Board Connections & Locations. 58 – 60Waveforms. . . . . . . . . . . . . . . . . . 58 – 60Main Board. . . . . . . . . . . . . . . . . . 61 – 64Power and Deflection Board. . . . 65 – 66Front Board . . . . . . . . . . . . . . . . . 67 – 68AV Switching / Video Board . . . . 69 – 72CRT Socket / VM Board . . . . . . . . 69 – 72SpecificationsPower Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz140W (Avg), 2.5A (Max)Antenna Input Impedance . . . . . . . . . . . . . . . . . 75ΩUHF/VHF/CATVDigitalReceiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),14 - 69 (UHF),01, 14 - 94, 95 - 125 (CATV)1 - 99 (Digital)Remote Ready . . . . . . . . . . 32 Key Remote ControlSound Output . . . . . . . . . . . . . . . . . . . . . . 5.0 W/CHIntermediate FrequencyPicture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHzSound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHzColor Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHzPicture Tube . . . . . . . . . . . . . . . . . W70ELC011X221SemiconductorsIntegrated Circuits . . . . . . . . . . . . . . . . . . . . . . . 30Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Except within Tuners, RC Pre-Amp. & Digital ModuleCabinet DimensionsWidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 858 mmHeight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543 mmDepth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538 mmREFERENCE No. SM780106HT28745, H3JAM, PRODUCT CODE 111375980INTEGRATEDINTEGRATEDDIGITAL TUNERDIGITAL TUNERD I G I T A LD I G I T A LDOLBYDOLBYCHCHVOLVOLPOWERPOWERServicing should be performed by only trained and qualified service personnel.