- #48 [Pillow167], 22-08-04 14:37好欣賞你的修理文章
- #47 [Pillow167], 22-08-04 08:19我真好欣賞你的修理文章, 每次都由頭看到尾, 你做嗰行, 難得工餘時間仲咁好心機整機, 真是 R33 福氣。
- #46 [silentlistener], 16-01-10 16:25Tsang sir,
已sent email 給你。 -
- #45 [etsang3], 16-01-10 13:16silentlistener 兄, 我收不到"silentlistener"的PM
你或可email給我
mp3eddie@yahoo.com - #44 [silentlistener], 16-01-10 10:07Tsang Sir,
I have PM you asking your help to repair my BA3000.
Grateful if you could check PM.
Thanks and regards,
F Cheung - #43 [silentlistener], 16-01-10 10:06Tsang Sir,
I have PM you asking our help to repair my BA3000.
Grateful if you could check PM.
Thanks and regards,
F Cheung - #42 [ricky1963], 12-06-17 18:41hi 曾生,我有套ca3000 & BA3000 100V,从二手店購入的,回家后才發現BA3000有邊錶頭上面燈燒了一個,能否更換的呢?如能更換能否改換像麥景圖既湖水藍色燈?因我找了很久都沒找到師父維修!在偶然機會看到你這個post,能pm我電聯?謝謝回覆
ricky thx - #41 [etsang3], 10-01-19 22:58to all Sansui user who want to connect Sansui amplifier to Tube preamp or Line amp.
Please check the output (RCA) of the tube preamp (lineamp) to make sure the DC output is less than 0.01VDC (10mVDC) with a digital meter "DC" setting.
Otherwise, once connect (or when you tune up the volume (e.g. BA2000,BA3000)) and power-ON, the front end transistors of your beloved Sansui will die. - #40 [klbchan], 10-01-19 21:27Hi Mr Tsang
Many thanks for your constructive advice.
Actually I found that the problem was caused by the tube buffer connected between the power amplifier and the pre amplifier.
I connected the pre amplifier and the power amplifier without the tube buffer and the problem was solved at once tonight.
Kenny - #39 [etsang3], 10-01-19 20:44klbchan hing, It may not be 100% the power amp problem.
Please try unplug all BA2000 input cables, tune both L & R vol to max and connect the spk and let the amp running. Then see if the noise happen again. If not problem again, it may be the problem of the pre-amp or the source gear (e.g. CD player)
- #38 [klbchan], 10-01-19 15:51Hi Mr Tsang
My vintage Sansui power amplifier BA2000 seems to experience a problem with its power output.
After I switch it on for a few minutes, the normal sound becomes something like an explosion which almost blows out my speaker. It usually happens on one channel and the volume metre of that channel jumps up and down unsteadily.
This problem started to exist from last night onwards. Last week, there was no such problem.
Can you sort out the power output problem?
What is the cause?Please offer me some advice.
Thanks!
Kenny
最後修改時間: 2010-01-19 15:53:46 - #37 [im_captain], 10-01-19 15:01今日無意中睇曬你既修理post!!
好細心阿,又專業!!!~ 收唔收徒弟阿,hehee?!
突然生出一D邪惡思想~ 想整懷D機拎比你整,
(整左會好聲D)呵呵~!
不過小弟果D全部土炮DIY野，整都曬時間...呵呵~!!
支持你~!! 希望以後都有詳細既過程收睇~
令我等井蛙可以長長眼~睇睇名師整名機~ - #36 [etsang3], 10-01-19 12:34hi im1663, I don't know your meaning of Power Output Lower.
Overall Power before Clipping, I did not measure.
Comments for all owners after repair are "The amp is more powerful than before. Every note is more details " - #35 [im1663], 10-01-18 17:58100mA is quite high, I think 50mA will be ok, did u compare the sound of high and low bias, will the power output lower due to high bias
- #34 [etsang3], 10-01-17 01:23im1663 hing, I set 100mA/power transistor. The heatsink of this Sansui is big but no so effective. At this BIAS, the heatsink is around 50'C.
DC off-set adj is the Blue VR. (Grey VR is BIAS adj)
http://i20.photobucket.com/albums/b206/etsang3/Sansui/BA3000/unit2fix_1.jpg - #33 [im1663], 10-01-16 15:24What is the bias current set for MJ15024/25.
Can dc offset be adjust - #32 [R33waifu], 10-01-13 12:45
勞心勞力！
勁！ - #31 [camzan], 10-01-13 12:32鬼斧神功,真開心脫胎愌骨,回家同機主團聚ｏ
- #30 [etsang3], 10-01-13 11:57MJ15024,15025聲同power都測試OK.機主可接成set"病人"出院勒。(BA3000 & CA3000)
- #29 [etsang3], 10-01-13 11:55發覺power管散熱器D線好霉,做野都碰斷左兩條,一驚之下都係全部開皮再焊過。
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etsang3 修理 SANSUI BA3000 (UNIT # 2)