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File name CTR-AA.pdf

SERVICE MANUAL CHASSIS CTR-AA CONTENTS 1.- Technical specifications 2.- Connection facilities 3.- Mechanical instructions 4.- Oscillograms 5.- Print board layout 6.- Electric scheme 7.- Circuit description 7.1.- Small signal processing, Microcontroller/Teletext 7.2.- RGB amplifiers 7.3.- Deflection 7.4.- Sound amplifier 7.5.- Power supply 7.6.- Protections 7.7.- Sets with SECAM L/L systems 7.8.- Stereo sets Page 3 3 4 5 6 7 - 12 13 13 17 17 17 18 19 19 20 22 22 22 22 23 23 23 25 25 26 27 8.- Electrical adjustments 8.1.- Service mode 8.2.- Power supply and focusing 8.3.- AGC adjustment 8.4.- White D 8.5.- Geometry 8.6.- Options 8.7.- Entering and exiting Plug & Play 8.8.- Error messages 9.- Safety instructions 10.- Service components 2 1. Technical specifications CHASSIS CTR - AA Mains voltage Power cons. at 220V~ Aerial input inpedance Min. aerial input VHF Min. aerial input UHF Max. aerial input VHF/UHF Pull-in range colour sync. Pull-in range horizontal sync. Pull-in range vertical sync. Picture tube range : 220 - 240 V ± 10% AC; 50 Hz (±5%) : 35 W (14''), 50W (20''/21''), 55 W (21" Real Flat), 3W (Stand-By) : 75 W - coax : 30µV : 40µV : 180mV : ± 300Hz : ± 600 Hz : ± 5 Hz : 14'' / 21`' / 21" RF / 21" PRF : Mono: 25W 1W (14''), 16W 2W (20''/21'') : Estereo : 2x16W 2x4W (21''), 2x5 W (21" Real Flat) TV Systems : PAL BG : PAL I : PAL / SECAM BG / DK : PAL / SECAM BG / L / L' : On screen display (OSD) green and menu : 1 LED (red in On and blinking red in stand-by Indications VCR programs Tuning and operating system UV1315A / IEC (VST) : 99, 0 (new mask software) / : VST : VHFa: 48 - 168 MHz : VHFb: 175 - 447 MHz : UHF: 455 - 855 MHz : UHF: 455 - 855 MHz U1343A / IEC (VST) Local operating functions : Vol/Prog, +, -, contrast, colour, brightness and sharpness (and hue on program AV with NTSC signal). 2. Connection facilities Euroconnector 1 Euroconnector 2 Ext 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 - Audio R Audio R Audio L Audio Blue Audio L Azul CVBS status 1 Green Green Red Red RGB status Ext 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 - Audio R Audio R Audio L Audio Audio L CVBS status 2 Chroma Chroma - (0V5 RMS@ 1K ) (0V5 RMS@ 1K ) ( 0V5 RMS @ 1K ). (0V2 - 2V RMS @ 10K ). (0V7pp @ 75W ). (0-2V int., 10-12V ext.). (0-2V int., 10-12V ext.). (0V7pp @75W ). (0-V4 int.) (1-3V ext.@ 75W ). 17 18 19 20 21 - CVBS CVBS CVBS CVBS Earthscreen . 17 18 19 20 21 - CVBS CVBS CVBS CVBS /Y Earthscreen . ( 1Vpp @ 75W ) ( 1Vpp @ 75W ) Head phone: 8 to 600W. 3,5mm ш. Mono : 25mW @ 32W Stereo : 2x6mW @ 32W 3 3. Mechanical instructions For the main carrier two service positions are possible (3.1). A: For faulfinding on the component side of the main carrier. B: For (de) soldering activities on the copper side of the main carrier. Position A can be reached by first removing the mains cord from it's fixation, then loosen the carrier lips (1) and then pulling the carrier panel (2) for approximately 10 cm. Position B can be reached from