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AK19 Problem solving guide.pdfARIZALAR1 Seite 1 von 5 Product Circuit Diagram Circuit Description Change Bulletin Hardware & Software Opt. Service Manual Problem Solving Guide Exploded Views PROBLEM SOLVING GUIDE OF THE 11AK19 MAINBOARD : From the "Problem Solving Guide" menu you select a chassis and see the "Problem Solving Guide" page designed for that chassis. In these pages, you can see some well-known and mostly faced problems and some hints to detect the source of the problem. If the conditions in the "Descriptions" parts are the situations that you face up with, then beside that description , you can see the "Defected components" to be replaced for solving the problem. NR PROBLEM 1 No sound (mono) DESCRIPTIONS 1-Speakers 2-IC100 pin 5: -12.5VDC 3-IC100 pin 7: +12.5VDC 4-IC100 pin 2: +12.5VDC 5IC100 pin 9: Sound signal (Scop) 6-IC401 pin 15: Sound signal (Scop) 7-IC401 pin 55:Sound signal (Scop) 1-Speakers 2-IC100 pin 5: -12.5VDC 3-IC100 pin 7: +12.5VDC 4-IC100 pin 2: +12.5VDC 5IC100 pin 9: Sound
AK19_Circuit Description.pdfPTC DEGAUSS COIL D 811 IC 804 S + 5V D 801,802,803,804 + 12V 220V/AC IC 805 + 8V + 14V D 806 D 812 D 813 IC 807 + 5V D 814 + 300V R 806 START UP D 815 - 14V IC 802 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 PROTECTION SENSE + 14V Q 802 D 816 + 115 / 150V OPTOCOPPLER Q 810 IC 801 REG-SENSE R 819 I-SENS Q809 Q 807 STAND-BY = LOW ON = HIGH STAND-BY = HIGH ON = LOW D 819 S C H A L T N E T Z T E L E N S C H A L T E N D E S G E R A E T E S W E N N D A S F S G M T D E M N E T Z S C H A L T E R E N G E S C H A L T E T W R D B E K O M M T D A S IC 8 0 2 B E R D E M W D E R S T A N D R 8 0 6 A N P IN 1 E I N " S T A R T -I M P U L S " .D A S I C 8 0 2 E R Z E U G T N U N A M P N 3 D A S A N S T E U E R S G N A L F R D E N T H Y R S T O R .D I E V ERSO RG U N G SSPAN N U N G DES T H Y R IS T O R S ERZEUGEN D E G L E IC H R IC H T E R D IO D E N D 8 0 1 ,D 8 0 2 ,D 8 0 3 U N D D 8 0 4 .D I E S E G E L A N G T B E R D I E W I C K L U N G D E S S M P S -T R A F O S A N DEN G A

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