JBL DSC260 Recap |
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shaun1264
Registered User Joined: 06 September 2013 Location: Surrey Status: Offline Points: 277 |
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Posted: 22 April 2020 at 4:52pm |
I've had this old JBL DSC260 controller for sometime. Made in 1999 by good old BSS. The top end frequencies were sounding vague and the display/functions slow to change. I thought it could do with a complete recap on the board including the switching power supply. Old capacitors were Capxon and Jamicon. Replaced with decent Nichicon PW and Panasonic Bi-polars. The main high voltage cap on the switching power supply high side is a Ruybicon 1000uf which I kept. Quite a bog standard switching power supply with jumpers to switch off the various power rails. Many caps were showing high ESR especially the miniature 10uf's. Some very decent chips at the time on this board... AKM AK5392-VS A/D, Analog Devices OP275 opamps, Cirrus Logic CS4390KSEP 24bit D/A converter and two Motorola DSP56004FJ50 processors. What a difference it has made when I reinstalled the controller after the work. High Frequencies lots of detail and sweet and buttons/ settings change much more responsive. It actually sounds so much better than my Behringer DCX2496's |
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Yes the 275s are nice chips, still about £2 an IC as well. Very much worth recovering... Good work
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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bipolars are generally higher esr than normal electrolytics, when they lose capacitance it's the bass that suffers. High frequencies can usually get through pretty knackered capacitors. I've seen those on the JBL go totally open and bulge out at the top for some reason which doesn't help the sound!
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Kevin
North Staffordshire |
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