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影音天地主旨 ﹝請按主旨作出回應﹞ | 寄件者 | 傳送日期 |
[#1] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 早幾天插電開機時power一直在閃,完全開唔倒機,唔知壞了什麼,是100V機來的,咁舊的機還會有人整嗎?救師兄門打救小弟! |
cowegg 正式會員 210.xxx.xxx.160 |
2017-08-18 20:04 | |
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[#2] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 机不分新定舊,最重要識唔識整,這裡大把師傅 |
168** 正式會員 182.xxx.xxx.244 |
2017-08-18 20:08 |
[#3] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? up下. e部機 原設計 唔 穩定. 要整到穩定 都有d野攪. 摩改 番新 動作會大d; 但始終年代久遠 仲落唔落本去博? 或 頭痛 只 醫頭, 燒咗セ換セ. https://tinyurl.com/yae6guob Power amp section: Replace the output transistors with Motorola transistors MJ21193/94. Add a 100pF cap in parallel with C15 and C16. Change C01 to 4700pF. (Keeps R.F. out of the input.) mmPhono Amp section: Add 1500pF in parallel with C15 and C16 (Stabilizes the amp) Change R43 to a 330uF/63V electrolytic cap. Non polar is best, but not necessary. Mount the - end toward R42. This sets the gain at unity for DC. You don't want gain at DC in a phono amp; otherwise a warped record would blow the cones right out of your speakers. Also there is so much gain in the phono stage that if you allow gain at DC, the output drifts all over the place and you can't null out the DC on the output. It is capacitor coupled at the output, but the drifting DC gets through as very low frequency noise. If you look at the output of the mm phono stage, it doesn't like to be connected right up to a meter or a scope and it starts to oscillate. You must connect your meter or scope to it through a 1K resistor. I got it so it wouldn't oscillate by itself, but I couldn't get it to be stable into capacitive loads. Fortunately there is a 560 ohm resistor in series with the phono preamp output, probably for this very reason |
cornercube 正式會員 119.xxx.xxx.228 |
2017-08-19 07:15 |
[#4] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 更正#3 出處: https://tinyurl.com/y99roy63 |
cornercube 正式會員 119.xxx.xxx.228 |
2017-08-19 07:39 |
[#5] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 唔會化?我曾有過三部都好正常無事,分柝力比以上提過的山水機种高過晒,超正的 |
168** 正式會員 182.xxx.xxx.40 |
2017-08-19 10:58 |
[#6] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 如果唔怕再冒險... 或 揾d機齡新d, 可直插220 volt... 風險自負.. https://www.taobao.com/oshtml/buy-cn/cp_yb3Lrrmmt8W2_srWt6LJ1Q.html?spm=a21m2.8232368.0.0.14e47277nDiK26&s=45&sort=sale-desc |
cornercube 正式會員 119.xxx.xxx.228 |
2017-08-19 11:48 |
[#7] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 唔隱定? 禾果部一d問題都冇,仲超靚聲,尤其份phono. |
talkboy 正式會員 103.xxx.xxx.73 |
2017-08-19 12:51 |
[#8] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 多謝各位師兄意見,今早拉了部機出來看下,插番電又正常著得番機,無事了,可能是潮濕或有野鬆左,嚇死,現在又可以正常用住先,THX!各位! |
cowegg 正式會員 103.xxx.xxx.142 |
2017-08-19 13:40 |
[#9] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? AU-X1曾經被日本音響已故名宿(長岡鉄男士)評為好声及超班的機种! |
168** 正式會員 182.xxx.xxx.40 |
2017-08-19 13:46 |
[#10] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 以後用風筒吹下,五分鐘後 開機 |
Phil.ng 會員 49.xxx.xxx.139 |
2017-08-19 14:28 |
[#11] 山水舊擴音機AU-X1壞了,那裡仲有得維修呢? 好呀,試下先 |
cowegg 正式會員 103.xxx.xxx.142 |
2017-08-19 18:31 |
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