NV-V8000 vcr caps change

[Thermaltake]

Hi, I am restoring my NV-V8000, and wondering there is 16V 4700uF cap near transformer, is it low esr one or normal one ? On PSU they are all replaced with low esr, but I am not sure about that one near transformer. I tried to google and look at manual but I couldn't find anything.

[stj]

hard to say without a schematic.
try rubycon YXF series.
they are high temperature long-life caps with a slightly low esr without being extreme like FR or ZL's

[Thermaltake]

I have Nippon KYA are they too extreme for that ?

If it's not a problem can you take a look at manual I upload it for you (it's a bit big 155MB), I couldn't find myself.

https://mega.nz/file/49QSnJbB#dKmndz_Y1U8iJnWTC5r8HlwbxGtFSJ8vkc-ju2a3OCQ

here is how the situation looks like, I will only change this big one, little ones I won't touch.

[stj]

thats linear, any high temperature longlife cap will do.
but the small ones are the ones you need to replace first - they dry out faster

[Thermaltake]

thats linear, any high temperature longlife cap will do.
but the small ones are the ones you need to replace first - they dry out faster

Would transformer perform worst or something if I put low esr on both little ones and big one ? Or it's recommanded to put normal 105C caps on all ?

[Thermaltake]

I order that big one 25V 4700uF normal esr. But those little ones6.3V 47µF, 25V 33µF, 6.3V 100µF, 16V 47µF, 6.3V 100µF, and 16V 33µFI couldn't find normal esr they are all low esr.


Also there is lower board I think it's servo board (VJB06704), don't know if you saw it in manual. I assume that board is controling timings and stuff like that, and caps should be normal esr, am I right ?

[stj]

i use low esr for everything,
but when your talking about anything over 2200uf there is a noticeable price difference for low esr caps
specially stuff like these:
https://uk.rs-online.com/web/p/alumi...citors/7441256

[Thermaltake]

i use low esr for everything,
but when your talking about anything over 2200uf there is a noticeable price difference for low esr caps
specially stuff like these:
https://uk.rs-online.com/web/p/alumi...citors/7441256

I already have at home low esr. I order normal one for that 4700uF that you told me should be normal, they are not expensive here in Croatia. So I will put normal esr then for that 4700uF, and little ones low esr, because I couldn't find that little ones in normal esr.


Also question along with this one from thread. In my JVC on main I will put low esr but on REG section is it ok to put low esr or should I put normal caps ?

[stj]

regulators need low esr,
infact most datasheets recomend using tantalum on the output pin.

[Thermaltake]

regulators need low esr,
infact most datasheets recomend using tantalum on the output pin.

Ok. Thanks for clarifying that, because chatgpt told me I need to put their normal esr caps...

So what about transformer is it ok to put normal esr for big 4700uF and little ones low esr ?

This is board of my S7960

[stj]

the transformer is running at mains frequency's so it wont stress the caps - 100-120Hz.
low esr is needed up in the KHz range.

as for chatGPT, forget it.
all these so-called AI systems "learn" by trawling the net and some social media.
and we all know how much shit is out on line!!!

[Thermaltake]

the transformer is running at mains frequency's so it wont stress the caps - 100-120Hz.
low esr is needed up in the KHz range.

as for chatGPT, forget it.
all these so-called AI systems "learn" by trawling the net and some social media.
and we all know how much shit is out on line!!!

Thank you for Your help

[R_J]

I see you are working on two vcr's, The JVC vcr has a SMPS, after looking at the service manual for the panasonic, C1003 is just for the linear power supply like stj said. so no need for low esr

[Thermaltake]

I see you are working on two vcr's, The JVC vcr has a SMPS, after looking at the service manual for the panasonic, C1003 is just for the linear power supply like stj said. so no need for low esr

Yes I am hobbiest, love to repair stuff. Actually 3 VCR's. 1. S9760, 2. S9850 and NV-V8000

Thanks for the help



I just google one of that Lelon cap. in REG section on my S9760, and it's saying in specifications that it's standard cap. It's not same value as mine, but tags on it are the same.

https://powerfulsound.com/product/lelon-rea-22uf-450v16x25mm/1546/

[Thermaltake]

Correction it's S7960.

So it's safe to replace all that caps. in REG section and that one near buttons with low esr ?

[Thermaltake]

Also I can't find in manaul on SysCon/Servo board on my NV-V8000 should I put normal esr caps or low esr I was reading that board is for timings and stuff. Does timing boards need normal caps instead of low esr to work normal ?

[stj]

timing is done by crystals not caps - luckily.

[Thermaltake]

timing is done by crystals not caps - luckily.

Oh ok, I'm a hobbyist so I am still catching and learning. Thank you

[Thermaltake]

One more help.

I was trying to look in my V8000 at capacitor physically in video board but it's deep under the doughter boards and I can't see it's values. In manual it's under C3768, can someone see in manual or find somehow the values ? I was looking but nothing in the manual seems to point out what value that capacitor is.

[stj]

got a link for the manual?