Technics SU-V40

jtubio1 · 4th September 2011, 07:05 PM

Dear friends: I have an old Technics SU-V40 Class AA, recovery from dump, based on SVI4003 power amp IC plus 2SC3298 / 2SA1306 power transistors.
It does not work and I want to fix. Anybody has the manual service / repair book?. I am reading similar threads and I have a question on the SVI replacement: Is SVI same that

ThorstenL · 4th September 2011, 07:45 PM

Hi,

Quote:

Originally Posted by jtubio1

Dear friends: I have an old Technics SU-V40 Class AA, recovery from dump, based on SVI4003 power amp IC plus 2SC3298 / 2SA1306 power transistors. It does not work and I want to fix.

Hint.

Gut it, build an LM3875TF based gainclone in the chassis using the transformer, heatsink etc.

It will sound better and not cost much.

Ciao T

jtubio1 · 5th September 2011, 11:09 PM

Hi all, In the before reply I want to do this answer: Is same SVI4003 that STK4003?
Thanks in advance, Jorge

jaycee · 6th September 2011, 07:57 AM

No. The STK4003 is a complete power amp on a chip. The SVI4003 is just the small-signal stages that uses external power transistors. If I remember correctly it was made specifically for Technics. The SVI was the weak point which often overheated and failed.

A replacement will be difficult to get.

4th September 2011, 07:05 PM	#1
jtubio1 diyAudio Member Join Date: Jun 2010	Technics SU-V40 Dear friends: I have an old Technics SU-V40 Class AA, recovery from dump, based on SVI4003 power amp IC plus 2SC3298 / 2SA1306 power transistors. It does not work and I want to fix. Anybody has the manual service / repair book?. I am reading similar threads and I have a question on the SVI replacement: Is SVI same that

5th September 2011, 11:09 PM	#3
jtubio1 diyAudio Member Join Date: Jun 2010	SVI4003 Technics IC power amplifier Hi all, In the before reply I want to do this answer: Is same SVI4003 that STK4003? Thanks in advance, Jorge

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6th September 2011, 07:57 AM	#4
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	No. The STK4003 is a complete power amp on a chip. The SVI4003 is just the small-signal stages that uses external power transistors. If I remember correctly it was made specifically for Technics. The SVI was the weak point which often overheated and failed. A replacement will be difficult to get.