Service manuals, schematics, eproms for electrical technicians

VEB STERN-RADIO AUTOSUPER A100 1965 SM

CAR-AUDIO - SERVICE MANUAL
Type: (ZIP)
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11.1 MB
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Category
CAR-AUDIO
SERVICE MANUAL
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    VEB STERNRADIO AUTOSUPER A-100 A100 1965 100 STERN RADIO
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Relevant CAR-AUDIO forum topics:
Becker Cascade BE7944 need help!

Hello to everyone!
Thanks in advance if someone can help)
I have a problem with replacement of malfunctioned final amplifier at Cascade BE7944.
It is play sounds through front loudspeakers with distortion. 
It is not a problem with wires (I have tested it them with ohmmeter) and loudspeakers (brand new).    
I have replaced with Traffic pro and it worked fine.
Radioengineer has announced the verdict - problem with final amplifier and it is must be replaced, and preferably with service manual or schematic, which I do not have. And I did not allow him to unassemble my Becker just "for to watch how it is looks from inside")  
The problem is following:
1. Do someone have and can share with me with service manual or schematic of Becker Cascade BE7944.
2. As far as I understand BE7944 is further development of schematic Audio 10 ECE Typ 6011 (or 4011), which service manual is available at Internet - can I use it as general background for BE7944?
3. At present time unfortunately there is no possibility to find original MLT TDA 7454, only CHN or unnamed versions. I do not want to install that, but according to datasheet for TDA 7454 it can be replaced with TDA 738 *. And TDA738 * can be raplaced with TDA 7560 or TDA 7850 (in my case TDA 7851 L). If it is possible to replace TDA 7454 with TDA 7851 L and with which modifications? And will I not lose the “Backer surround” function? 
4. Any other suggestions? Please withought "sell this dinosaur"
 I have written to Harman / Becker with this problem but still no answer ...   
Thanks to all!
 
Phase CC480 autós erősitő invertere zárlatba megy
Hi. A tárgybeli autós erősitő ugy került hozzám hogy pár fet.fél hid (irfz44) szétégett. Biztik jók maradtak,csak a fetek mentek tönkre. Átmértem a feteket és a többi passzivat és cseréltem ami rossz volt. Jött a próba...még jó hogy áramkorlátolva kapta a 12 voltot mert zárlatba vitte a tápot. a +/-12 voltnál még nemvolt gond.csak amikor a remote szálon inditottam...ahogy elindult a 494ic leált a tápom. méregettem...szkopoltam..minden jó.az ic két kimenetén szép és ellenfázisu a jel.a freki 36KHz körüli. Ic nélkül nincs zárlat a hidalt fetekben... Ja a végfokok jók.nincs zárlat a szek tápon. Tehát itt áltam meg Én most az inverter trafo menetzárlatára gondolok.... Vagy kevés lenne a 36KHz es freki??? Természetesen ic-t cseréltem.de a hiba maradt. Valakinek ötlete??? Üdv.egon
CLAA0621A11CW kijelző adatlapját keresem

Sziasztok!

Keresem a CLAA0621A11CW LCD kijelző adatlapját, esetleg a Kenwood DDX374BT vagy DNX4150BT kapcsolási rajzát. Az LCD-ből csak a 01CW adatlapját találtam meg, de nem tudom, a gamma feszültségek ugyanazok-e.
Ezen az oldalon elérhető lenne, de regisztráció után pontokat is kellene gyűjteni, vagy valami céges regisztráció kellne.

Jácint

JAPAN FM vs. EU FM
Hi!

 Használt már Valaki ilyet?

https://www.aliexpress.com/item/Car-Frequency-Antenna-Radio-FM-Band-Expander-For-Japanese-Autos-Signal-Reduce-Radio-FM-88-108/32798944228.html?spm=2114.search0604.3.1.72892184QavWAg&ws_ab_test=searchweb0_0,searchweb201602_7_10065_10068_319_317_10696_10084_453_10083_454_10618_10304_10307_10820_10821_537_10302_536_10902_10059_10884_10887_321_322_10103,searchweb201603_59,ppcSwitch_0&algo_expid=4d303015-6bb6-4982-9ffb-5feb5ea75beb-0&algo_pvid=4d303015-6bb6-4982-9ffb-5feb5ea75beb&transAbTest=ae803_4

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