{"id":2093,"date":"2016-03-29T09:32:23","date_gmt":"2016-03-29T07:32:23","guid":{"rendered":"http:\/\/www.dclabs.lt\/dainiaus\/?p=2093"},"modified":"2016-04-17T08:32:05","modified_gmt":"2016-04-17T06:32:05","slug":"vdo-rd3-01-tobulinimas","status":"publish","type":"post","link":"https:\/\/www.dclabs.lt\/dainiaus\/vdo-rd3-01-tobulinimas\/","title":{"rendered":"VDO RD3-01 tobulinimas"},"content":{"rendered":"

VDO RD3-01 automagnetola, naudojama \u012fvairiuose pranc\u016bzuose. I\u0161 vidaus atrodo va taip:<\/p>\n

\"IMAG0173\"<\/a><\/p>\n

\u0160itame grojiklyje galin\u012f stiprinim\u0105 daro TDA7385 <\/a>stiprintuvas, Flexiwatt 25 korpuse.<\/p>\n

\"IMAG0255\"<\/a><\/p>\n

Pagal apra\u0161ym\u0105 – 4 x 23W \u012f 4 \u03a9 prie 14,4V. Taigi, o kolon\u0117l\u0117s 160 W. Chm, gal d\u0117l to joms truput\u012f tr\u016bksta galios :D? Ai\u0161ku, i\u0161 14,4V daugiau galios ir nei\u0161eis padaryt, d\u0117l to reiks suprojektuoti ir pagaminti special\u0173 Hi-End stiprintuv\u0105, kuris pakeis original\u0173. Yra mikroschema, kuri gali pakeisti \u0161it\u0105 ir duoti truput\u012f daugiau galios – TDA7850 <\/a>(be A raid\u0117s gale, skiriasi korpusai, reikia Flexiwatt25, o su A raide b\u016bt\u0173 Flexiwatt27), 4 x 30 W\u00a0\u012f\u00a04 \u03a9 prie 14,4 V. Taigi, pirmas darbas gaunant papildomus 7\u00a0W \u012f kanal\u0105\u00a0– pakeisti galin\u012f stiprintuv\u0105. Neatitinka tik 25 kontaktas, kur\u012f \u0161iuo atveju tiesiog nukirpau. Toliau – linijini\u0173 i\u0161\u0117jim\u0173 pajungimas \u012f i\u0161orin\u012f stiprintuv\u0105, kuris jau gali b\u016bti labai galingas.\u00a0Tik b\u0117da, linijini\u0173 i\u0161\u0117jim\u0173 tai n\u0117ra, reiks pasidaryti :). Pirmu darbu reikia susirasti kontakt\u0173 reik\u0161mes.<\/p>\n

\"TDA7385\"<\/a><\/p>\n

\u0160tai, \u010dia ai\u0161kiai matosi, kad \u012f stiprintuv\u0105 signalas ateina per IN1, IN2, IN3 ir IN4. Va \u010dia ir ateina tas Line_out, kur\u012f reikt\u0173 i\u0161sivesti \u012f i\u0161or\u0119. Dar niuansas, \u012f \u010dia signalas tur\u0117t\u0173 ateiti po filtr\u0173, kuriuos reikt\u0173 patikrinti (tiksliau j\u0173 pralaidum\u0105). Pagal SAA7708H<\/a> DSP (Digital Signal Processor) apra\u0161ym\u0105, tarp DSP ir galinio stiprintuvo yra tokia filtr\u0173 schema:<\/p>\n

\"SAA7708H\"<\/a><\/p>\n

FLV –\u00a0Front Left audio voltage output of the FADER DAC
\nFLI –\u00a0Front Left audio current output of the FADER DAC<\/p>\n

Kadangi visi kanalai vienodi, tai kalb\u0117sime tik apie vien\u0105. Reali schema neatitinka duotos apra\u0161yme – R27 vietoje 100 \u03a9 \u012fd\u0117tas 3,3 k\u03a9 rezistorius, C37 n\u0117ra i\u0161 viso, C41 ne 2,2 \u03bcF, o 100 nF. Toliau vietoje pajungimo \u012f galin\u012f stiprintuv\u0105 yra dar RC filtras – 100 \u03a9 ir 19 nF. Taigi, reali vieno kanalo schema tokia:<\/p>\n

\"1<\/a><\/p>\n

Bet filtrai mums kol kas neaktualu, nes dabar reikt\u0173 paleisti signal\u0105 \u012f i\u0161or\u0119. Tik nuo kur jungtis ? \u0160iaip papras\u010diausia b\u016bt\u0173 jungtis nuo galinio stiprintuvo \u012f\u0117jimo, bet ten toks kosminis filtras (100\u00a0\u03a9 ir 19 nF)… Toliau turim dar kondensatori\u0173 ir rezistori\u0173, o vat juos galima ir reikt\u0173 palikti, nes bus nuolatin\u0117s srov\u0117s nufiltravimas ir srov\u0117s ribojimas. I\u0161vada ai\u0161ki jungtis reiks tarp C41 ir 100 \u03a9 rezistoriaus, o pat\u012f 100 rezistori\u0173 – i\u0161lituoti ir prilituoti tik vien\u0105 pus\u0119 (kad nepasimest\u0173, bet ir nesujungt\u0173 signalui kelio). Taip originalus galinukas sau ramiai r\u016bkys, kol vis\u0105 darb\u0105 atliks papildomas stiprintuvas. Nesunkiai atsekami ir i\u0161\u0117jimai:<\/p>\n

OUT1 – Front Left (priekinis kairys)
\nOUT2 – Rear Left (galinis kairys)
\nOUT3 – Front Right (priekinis de\u0161inys)
\nOUT4 – Rear Right (galinis de\u0161inys)<\/p>\n

\u0160tai, dabar atitinkamai su\u017eymimi ir \u012f\u0117jimai (IN1 – OUT1 ir t.t.).<\/p>\n

Nebaigta \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

VDO RD3-01 automagnetola, naudojama \u012fvairiuose pranc\u016bzuose. I\u0161 vidaus atrodo va taip: \u0160itame grojiklyje galin\u012f stiprinim\u0105 daro TDA7385 stiprintuvas, Flexiwatt 25 korpuse. Pagal apra\u0161ym\u0105 – 4 x 23W \u012f 4 \u03a9 prie 14,4V. Taigi, o kolon\u0117l\u0117s 160 W. Chm, gal d\u0117l to joms truput\u012f tr\u016bksta galios :D? Ai\u0161ku, i\u0161 14,4V daugiau galios ir nei\u0161eis padaryt, d\u0117l…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,4],"tags":[],"class_list":["post-2093","post","type-post","status-publish","format-standard","hentry","category-auto","category-elektronika"],"_links":{"self":[{"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/posts\/2093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/comments?post=2093"}],"version-history":[{"count":27,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/posts\/2093\/revisions"}],"predecessor-version":[{"id":2249,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/posts\/2093\/revisions\/2249"}],"wp:attachment":[{"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/media?parent=2093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/categories?post=2093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dclabs.lt\/dainiaus\/wp-json\/wp\/v2\/tags?post=2093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}