Список разделов >> Архив по мониторам: «Диод от Sanken RP1h ( 2kV, 0.1А) в прямом направлении...»
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Shurin
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... 500 Ом!(стрелочный прибор на пред.1кОм), это нормально? Стоит в VS 815-4 на G2.:
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Ср Фев 12, 2003 3:04 pm
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Илья
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Думаю, что нормально. Он внутри может из нескольких диодов.
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Ср Фев 12, 2003 4:06 pm
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Shurin
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Спасибо, оказывается не я один такой тупой:
Все нормально, если я правильно понял перевод с:
http://www.anatekcorp.com/faq/monitor.htm
Вот и сам вопрос:
QUESTION NO. P101102-7: Panasonic Panasync S110i Chassis 21HV12S Model TX-D1F64MA monitor. Has vertical white line signal ok, yoke ok came in with shorted h/def transistor Q555 (2SC5423), used 2SC5047 problem remains. Have reviewed questions P311-4, P61402-7 & P60602-5, very similar in most cases but not exactly the same. Secondary voltages ok. Suspecting D606 Sanken RP1HN special build reads high impedance, is this correct or going in wrong direction? Q881, Q549 & R890 are also ok.
Beware of false board numbering. Q861 is not a transistor but an 800mA semi-fuse, after replacing this the 185 volt rail was restored and works fine with 2SC5047 a little bigger physically but angle the 6.8 ohm resistor to fit.
A Sanken RP1H is a 2KV diode, and its forward voltage is 6 to 7 volts, so many meters will read it as open-circuit in the forward direction. First, check the P/S secondary, on the 185 Volt supply, and see if either R861 (0.33 Ohm, 1/2W), or the microfuse at location Q861 (TO-92 case, UN11008 = 0.8 Amp fuse), are open. If the 185 Volts gets to Q881, after all, see if Q881 has gate drive. If no, check IC850. If Q881 is getting gate drive, and providing B+ voltage to the collector of Q555, after all, see if Q555`s base has horizontal drive from IC580, via Q549; also check R554, D555.
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Ср Фев 12, 2003 4:21 pm
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