The The C-2102 is the matching pre-amplifier for the B-2102 power amp. I use the C-2102 as the pre-amp to provide signals to my C-2102 and C-2101 for horizontal bi-amping.
One of the unique features is of the C-2102 is the use of parametric equalisers for tone control. It is known to possess a good phono stage.
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| Front |
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| Rear |
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| Original internals |
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| After recapping |
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| Bottom view |
Caps used include Panasonic ECA and FC, Wima, silver mica, EPCOS and OSCON.
Update - 24Mar2012
Took the C-2102 out to partner the B-2101. Was initially disappointed by it's performance - sounded reserved and the high's did not flow naturally.
Hence I replaced the OSCON with a Nichicon on the motherboard. Replaced the WIMA 0.022uF at C26 with a Russian Paper-In-Oil (PIO) 0.047uF (back to original value) as it is in a tonal ladder.
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| Close-up of motherboard area with changes |
In addition, removed the previous bypass under the motherboard and place a Philips BC 0.026uF bypass to C26 as the highs required a slight adjustment.
The results in a word - WOW!!!
Hi,
ReplyDeleteI recently got a hold of a B-2102 and c-2102 and I would like to do a recap. would you have a detailed list of caps and their values?
Thanks
Apologies as these were completed a few years before I started the blog. Suggest you download the service manual from hifiengine and start from there.
ReplyDeleteBest Wishes!
Thanks,
ReplyDeleteWould you know if there is a difference between the c-2101 and the c-2102? The only service manuals I could find are those for the c-2101.
There does seem to be lesser items on the C-2102.
ReplyDeleteSuggest you refer to the service manual to compare against the PCB, before you begin.
Hi Wick. I'm an electrical engineer and I have the hi-fi repair hobby. A my friends has a C-21-02 that don't operating. The proble is tha there isn't signal but when the poer is on there is only the power and tuner light on. on the phones you can hear only electric discharges. I have the Service manual end I have an oscilloscope and a multimeter. Can you suggest me a procedure to fix the problem? best regards Gianfranco
ReplyDeleteSorry no. Can only suggest you start check the relays for each of the input
DeleteHello, the mods look very good, congratulations. I also have the feeling that the heights are not good. I would like to build your mod, if it does not bother you .. Can you please tell me the exact name of the Paper-In-Oil (PIO) 0.047uF and the replaced OSCON with a Nichicon .. how many volts etc. or a link where I get it. Also from the Philips BC 0.026uF bypass to C26 under the motherboard .. Do you have a picture of it? I would be very grateful for the information .. many thanks. Greetings Jenny
ReplyDeleteSorry no pix of those exact pieces as they are all in storage at moment. I can provide information thou - the components can be equal or higher voltage. Service manual for the unit at HIFIEngine.com
DeleteThe PIO (dark green) I bought from EBay long ago and was listed by Russian seller. The other caps from all over eg EBay, Taobao, Element14, etc.
The BC bypass was the same eg from EBay - it's just a poly which is a light blue squarish piece with long leads.
Maybe difficult to get exact parts nowadays as dependant on supply. For instance, the bypass can use the cheap yellow cylinder ROE instead.
Sonic signature for the rest dependant on preference. Some may prefer ELNA, BC, FC etc. Probably best to get a few different caps to try out if you are not familiar with their sonic signature.