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ERRES KY525 2 AM-FM RECEIVER SCH

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
1.2 MB
Page
1
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    ERRES KY-525 RECEIVER KY525 AMFM KY 525 AM FM AM-FM
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Relevant AUDIO forum topics:
RA 6363S rádiós erősítő némítás helyett zúgó hangot ad. Megoldva
Tisztelt Kollégák! A címben szereplő erősítő a nyomógombjainak érintésekor nem némít, hanem zúgó, brummos hangot ad mind két csatornán. A tápfeszültségek rajz szerintiek. A végerősítő modulok 7 csatlakozási pontján az érintés idejére mérhető a negatív - pozitív feszültség változás. A bemenetet szabályzó FET-et cseréltem. Semmi változás. Hasonló hangot ad az erősítő a bekapcsolást követő egy két másodpercig. Egyébként az erősítő elég jól szól. Mi okozhat ilyen hibát? Köris
repair sony amplifier str-de254
Want to share: Have downloaded the schematics from this forum to help repair the amplifier of a friend. Turned out that Sony decided to route the earth through the chassis, even the earth between the various supplies. When one takes the main board out of the chassis and switches the amp on, there are up to 20 volts difference between the eart (and hence reference) of the pre-amps and the main amps. Luckily the amp goes into protection but from a design point of view it is not nice to rely on screws and aluminum face plates to conduct up to 0.2 amps of current from one supply to another. What I did is solder wires to every eart point and connected them on the main board to make it stand alone and not rely on conducting current through the chassis anymore. Bad design, simple repair but took some digging in the schematics to find out what exactly was going on!
nincs hiba csak technikai kérdés autóerősítővel kapcsolatban. pontosabban: TDA7850 4*50W 4Channel Stereo Car Audio Power Amplifi
A gyári fejegység tuningjáról letéve elkezdtem keresgélni erősítőket. Az elvárásaim csak annyi,hogy a 4x43w-nél nagyobb legyen, kicsi könnyel elrejthető legyen és a legfontosabb ne kelljen az aksiról tápot behúzni is a kocsit bekábelezni. erre gondolok: https://www.aliexpress.com/item/TDA7850-4-50W-4Channel-Stereo-Car-Audio-Power-Amplifier-Board-12V-XH-M150/32801116968.html?spm=2114.01010208.3.41.Bhq8i2&ws_ab_test=searchweb0_0,searchweb201602_3_10152_10065_10151_10068_436_10136_10137_10157_10060_10138_10155_10062_10156_10154_10056_10055_10054_10059_10099_10103_10102_10096_10147_10052_10053_10142_10107_10050_10051_10171_10084_10083_10119_10080_10082_10081_10110_10111_10112_10113_10114_10181_10183_10182_10185_10078_10079_10073_10070_10123_10120,searchweb201603_2,ppcSwitch_5&btsid=366164ea-4048-4cd7-b4f5-f02c249e90d2&algo_expid=9eddad31-2f11-4d34-856e-0108a3f79a36-5&algo_pvid=9eddad31-2f11-4d34-856e-0108a3f79a36 érdemes ilyenekkel próbálkozni?
Videoton EA 7386S PHONO állásban fél csatorna nem működik
Sziasztok Fent említett erősítőbe keresek HA 12017 című ic-t, ami a lemezjátszó előerősítőjében van (akár modult is). Köszönettel: Csaba
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