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MCMICHAEL 374 TRANSPORTABLE RADIO 1941 SM

AUDIO - SERVICE MANUAL
Type: (PDF)
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636.0 KB
Page
4
Category
AUDIO
SERVICE MANUAL
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    MCMICHAEL RADIO 374 1941
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Relevant AUDIO forum topics:
PANASONIC SA-AK28 - nem lehet kikapcsolni
Szevasztok! Ez a szerkezet kifogástalanul működik, egy baja van: se távirányítóról, se kézzel nem lehet KIkapcsolni(be meg igen). Mivel engem már az infarktus kerülget, kérdezném: a helyrehozatalra akadna bátor vállalkozó? Kösz előre is! A legjobbakat Mindenkinek: Thanatos
Yamaha CDX-590 laser adjustments?
I have a Yamaha CDX-590 CD player and it skips on some CDs - original CDs, these CDs play without problems on my other CD players. I have changed the laser unit (KSS-210A) but this didn't solve the problem. When I turn the player upside down, it plays the problematic CDs without a problem. That's why I think the laser needs adjustment. I have only a service manual for the CDX-493/593 but they should be very similar to the CDX-590. It seems that the adjustments are done via "test mode" of the CDX-590, unfortunately there is not much information, how to exactly, in the service manual. Here is a picture of the PCB. http://www.volny.cz/hwtest/PCB.JPG Here are the "test mode" sections of the service manual. http://www.volny.cz/hwtest/TM1.GIF http://www.volny.cz/hwtest/TM2.GIF In "test mode" I have tried Auto adjustment mode 1, 2, 3, but I don't know if it should work fully automatic without any intervention or when the mode is fineshed and I can proceed to the next one. So I activated mode 1, waited a while, activated mode 2, waited a while, activated mode 3, then exited test mode. It didn't help. Mode 1 - only a short blink of two horizontal dashes on the display and thats it Mode 2 - started "play" without sound from a strange time 99:00 (the test CD is not so long), after a while it skips to another time, "plays" a while, then skips back and "plays" and so on, I left it about an hour and it was still going on Mode 3 - seems to be very short as mode 1 I think I'm missing something ... Maybe someone did this or even serviced Yamahas in an official service and can provide information how to adjust the laser? Or maybe the problem is not the laser?
PHILIPS AW 7140 RÁDIOS MAGNO
ÜDV TANYALAKOK! megtudná mondani a fent emlitett magnoban lévö végfok ic tipusát valaki? rajzot nem találtam hozzá sajnos. üdv:atis
rcf art 710-a mk4 gerjedve indul, pukkanással áll le

RCF ART710A mk4 hangfalat javítanék, a panel valószínű nem eredeti, azaz nem az ART710A ba való, a magassugárzó D-Class SMD FET es nem a hűtőtönkre csavarozott. DP600 van a panelre írva, eredeti RCF de valamelyik másik kétutas PA ból származik, teljesen illeszkedik az alu öntvényre.

Bekapcsoláskor sipolva, gerjedve indul, így:

 

https://www.youtube.com/shorts/KhvBDVSqCps

 

Kikapcsoláskor pár másodpercel a táp elvétele után pukkan. Olyan mintha nem lenne elég ideig MUTE ban. A tápja mechanikusan is sipolva-nyekeregve indul, ha ilyenkor a mute elmúlik és még sipol a táp akkor azt hallani a hangszórókból. AEB DPI IC hajtja a két két végfetet a két D-Clas ban az 5ös lábon nincs időalap kondi, az 5 ös láb a levegőben lóg. De mégis később indul a 415kHz körüli négyszögelés, csak nem tudom hogyan oldották meg. Ezt az időt kellene meghosszabbítani, gyári RCF kommunikációs kábelem, programom nincs, pedig az XLR en keresztül is lehetne flash elni van egy kapcsoló erre az egyik XLR csavar alatt, amivel át lehet kapcsolni service modba.

 

A kérdés azokhoz akik ismerik az RCF ek lelkivilágát, a mute időt itt lehet programozni, vagy van egy kondi vagy ellenállás valahol ami időalap?
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