Service manuals, schematics, eproms for electrical technicians
HEATHKIT HD-1424 ACTIVE ANTENNA SCH
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SERVICE MANUAL
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SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar heathkit manual?
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar heathkit manual?
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HEATHKIT HD-1424 ANTENNA HD1424 ACTIVE HD 1424
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Relevant OTHER forum topics:
Sziasztok!
Keresem megvételre a fent megnevezett készüléket. Nem kell hogy működjön, de viszonylag szép és hiánytalan készülék kellene.
Köszönettel Karesz.
Keresem megvételre a fent megnevezett készüléket. Nem kell hogy működjön, de viszonylag szép és hiánytalan készülék kellene.
Köszönettel Karesz.
Üdv Sziasztok
Vásároltunk egy pár darabot belőle a képen látható.
Már kettő nem működött 5 perc múlva.
Egy darabig méregettem , minden rendben és még sem világít. A tekercs is rendben volt.
Tettem még egy tekercset a meglévőre és működik.
Kicsit újítottam pdf-ben
Vásároltunk egy pár darabot belőle a képen látható.
Már kettő nem működött 5 perc múlva.
Egy darabig méregettem , minden rendben és még sem világít. A tekercs is rendben volt.
Tettem még egy tekercset a meglévőre és működik.
Kicsit újítottam pdf-ben
Kérem, Guest és guriga ne szóljon a topichoz!
Sziasztok!
Tudnátok segíteni?
Szerencsétlenkedek egy ilyennel. Nem indul a segédtáp. A táp IC 7 pinen 8,1 V mérek stabilan, de nem rugódik be az IC. Szkoppal nézve egy tüske nincs táp alá helyezés után a 6 pinen. A IC ON Semiconductor gyártmány, de cseréltem két másik ugyanolyan ON gyártmányra, de negatív. Az egészet átforrasztottam, mértem az alkatrészeket jónak tűnnek. Átmértem a vezetősávokat nem e szakadt...Egyszerűen passzolom.
http://keptarhely.eu/view.php?file=20201009v00tftz1.jpeg
http://keptarhely.eu/view.php?file=20201009v00tnqle.jpeg
http://keptarhely.eu/view.php?file=20201009v00tygaxy.jpeg
http://keptarhely.eu/view.php?file=20201009v00ti6m7v.jpeg
Kösz.
Working on a speed charge battery maintainer for small engines battery. Heat sink had (2) S2025R T0-220 type components on it. Seems they are an SCR and I have 57 ohms on 1 and 3 pin, so seem they are short. Cant get these anymore but installed S4025R which seems to be better replacement. Before replacing, heat sink seemed to be really hot after replacng on on
board 10 amp automotive slot type fuse, so seemed these SCR were bad, getting hot woth no load.
Standby LED not lighting with new SCR's installed. Old ones did not have heat sink compound on them, so I used some to better transfer heat. I saw the input of the 7805 1 amp
regulator IC has short, so removed it, and its not shorted, but the feed to it comes from the IC chip on board, a EM78P41 BWD20J. Data sheet for EM78P41 is online. They have pin 16 going to pin 1 of the 7805 regulator. Actual reading on pin 16 to ground is 2.5 ohms. I suspect this IC is shorted output. Is there chance to replace IC or is this repair finished?
board 10 amp automotive slot type fuse, so seemed these SCR were bad, getting hot woth no load.
Standby LED not lighting with new SCR's installed. Old ones did not have heat sink compound on them, so I used some to better transfer heat. I saw the input of the 7805 1 amp
regulator IC has short, so removed it, and its not shorted, but the feed to it comes from the IC chip on board, a EM78P41 BWD20J. Data sheet for EM78P41 is online. They have pin 16 going to pin 1 of the 7805 regulator. Actual reading on pin 16 to ground is 2.5 ohms. I suspect this IC is shorted output. Is there chance to replace IC or is this repair finished?
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