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Technics su v4x and SVI2004 operating temperature
Technics su v4x and SVI2004 operating temperature
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Old 19th January 2018, 04:09 PM   #21
SVI2004A is offline SVI2004A  New Zealand
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Technics su v4x and SVI2004 operating temperature
Pop in known good 1124/2632 combo, they handle the load better.

The amplifier has a liquid filled heat pipe... if the amplifier is not level (especially if the right hand <volume control> side is sitting lower than the power switch side) the liquid will not be behind the power ic.

The 2.5V capacitors are better... safe operating voltage is a good thing and at 10 farad, the memory will be long... run amp for around an hour or 2 to fully charge these
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Old 19th January 2018, 06:05 PM   #22
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I understand! Thanks for the clarity of the answer and the attention paid
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Old 26th January 2018, 12:30 PM   #23
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I need a service manual for Technics su v4x (and for a Sansui au317) in pdf format.
Thanks in advance to anyone who has the opportunity and willingness to send me the document.
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Old 27th January 2018, 02:42 PM   #24
SVI2004A is offline SVI2004A  New Zealand
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Technics su v4x and SVI2004 operating temperature
Have a look on hifiengine.com
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Old 1st February 2018, 02:22 PM   #25
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[QUOTE=SVI2004A;5312827]Itís rather pointless changing capacitors as only 3-4 per channel in signal path..

1 on phono amp... 2 in tone Controller pcb and 1 in main amp



svi2004a
can you tell me the numbering of each capacitor that is worth changing to su v4x. Thanks in advance!
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Old 2nd February 2018, 03:34 AM   #26
SVI2004A is offline SVI2004A  New Zealand
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Technics su v4x and SVI2004 operating temperature
On phono eq pcb C113, C114 1uf 5-V NP - there are 2 6.3V 2200uF c103 c104 for power supply stabiliser there too...

On tone board... c303 c304 50v 3.3uF.... c315 c316 25v 4.7uF and c321 c322 25v 10uF

Power amp... C501 C502 50V 3.3uF and on NFB c503 c504 16V 22uF

Aren’t sure there is much to gain... I haven’t recapped any V4X amps yet other than those memory caps gold cap 3.3F 2.3v
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Old 8th February 2018, 06:32 PM   #27
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Thanks SVI2004A.

All of them are in signal path ? ...and can be changed with nonpolarized ones?
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Old 10th February 2018, 03:50 PM   #28
SVI2004A is offline SVI2004A  New Zealand
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Technics su v4x and SVI2004 operating temperature
Haven’t tried bipolar...

Never recapped a V4X though

The 2200uf ones on phono board rent signal path ones

The tone board had a few hidden away

The other 2 on power amp board are on NFB line

I am somewhat a skeptic of recapping for the sake of it... I’m thinking I will try one some day and see if it’s all it’s cracked up to be...

There are a lot of cap types... if I do try it I’d probably use cerafine caps and see how it goes
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Old 12th March 2018, 08:04 PM   #29
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Somehow you had the opportunity to listen and a technics se a100?
I'm curious about a comparison of sound quality su-v4x vs se-a100.
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Old 16th March 2018, 06:29 AM   #30
SVI2004A is offline SVI2004A  New Zealand
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Technics su v4x and SVI2004 operating temperature
The new class A amps sound somewhat more lively... for me the V4X sounds more alluring... - I’d imagine playing around with pre amps will affect the A100 too.

Had similar results with SE-M100 too
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