[Stereodude]

Here are some pictures I took of the inside of my unit.  It's no wonder it runs so hot with such a poor thermal design.

[albee]

I think it might have something to do with the proximity of those radio-active sneakers.  

[J North]

Looks way different inside than my ES1.

Thanks for the pics!

[ooheadsoo]

Interesting.  Quite different to a layman's eye than the es1sl.

[AphileEarlyAdopter]

Is the power cord wires just plugged in , not soldered ? It might be easy to replace the power cords then.

[ooheadsoo]

Yes, it's just plugged in.  I soldered a power cord onto the prongs no problem.

[rsc]

FWIW, I Was poking around inside the F10 with a mirror and found the dac chip (as suspected it had). The chip is located on the underside of the board that the digital inputs are attached to.  There's also a motorola dsp chip on the board.

Cirrus Logic CS42518

[-Richard-]

Very interesting pictures...

Gawd my computer is slow...a rather old
Mac clone from pre-Steve Job days when
Apple forgot how to make a reliable CPU...

Pictures took forever to appear...

OK...does the inside of my beloved
F10 have a tri-path chip set or not????

Can anyone tell????

Thanks for your help.

Warm regards and seasons
greetings from Ojai.  -Richard-

[Horizons]

I have a few questions about this unit too as mine will soon arrive from J&R.

I was planning on soldering in a beefy AC Power cable and possibly upgrading some of the more obvious PS caps to BlackGates. Next might be hexfreds but I'm not sure those would be worth the trouble.

Does anyone know how hard this unit is to work on in terms of access to the boards, desoldering caps, etc.

Thanks

[ooheadsoo]

Wayne @ bolder looked at it and called it quits, didn't he?  I think what he ended up doing was just installing an IEC receptacle, more or less.

[mission777]

Looking for a cheap way to start into HT I stumbled on all the panny hype in different forums. This led me to the jvc rxf10s which I bought. It only has 50 hours on it yet so there is something to wait for I guess.

I took a peek inside as well. Mine is  a european version with scart connections. But otherwise the innards are quite simmilar.

The power suppy caps are : 6800uF // 42V
Quite  small for 6x100Watt. But I don´t thing the transformer will put out much ore then 100 -200 Watt max. I dislike the red/white wire from left (transformer) to the right (diode´s) in the top image of this thread. This is a nice  antenna to distribute the switching pulses of the diodes.
Maybe it is a sound idea to build a complete extrenal power supply.

I looked at the digital amplifier chips. I am still not shure its Tripath or not. There are three partly visible from the front. They have the typenumber JVC6014 on them. Is this a clue?

The wire to the speakers is very minimal stuff, but it looks like the feedback is taken very close to the outputs, but I am not sure.

I was looking to get a service manual, and I found a supplier here in the Netherlands , but it is about 30Euro (40$) which quite a lot for a 155Euro piece. Maybe I will ask JVC directly. If the normal maunaul is available ,maybe the other is as well.

[Horizons]

The power suppy caps are : 6800uF // 42V
Quite  small for 6x100Watt. But I don´t thing the transformer will put out much ore then 100 -200 Watt max.

Thanks for the info. Does it look very difficult to replace these caps with Black Gate caps of a larger capacitance value?

[mission777]

The power suppy caps are : 6800uF // 42V
Quite  small for 6x100Watt. But I don´t thing the transformer will put out much more then 100 -200 Watt max.

Thanks for the info. Does it look very difficult to replace these caps with Black Gate caps of a larger capacitance value?

There is plenty of space. But I think it is quite hard. Two circuitsboard are hanging over the rectifier/ps caps board. Moving the rectifiers ps caps closer to the transformer is the way I ´m  thinking now. But haven´t workend it out yet.
edited: The diodes are quite high above the ps board. You could solder some wire at it, without removing all the other boards. And add some more  capacitance. Doubling is normally handled ok.

I have some plan to improve the cooling. After removing the transparant plastic junk,  wrap  some bicycle innertube around the fan housing and the alu sqaure. Should make more air flowing through this duct. At the other end the same . But let the duct end real close to the ventilation holes. Friday I have some time for a closer look.

[Stereodude]

Thanks for the info. Does it look very difficult to replace these caps with Black Gate caps of a larger capacitance value?

Do you realize those caps are the value they are for a particular reason?

[ooheadsoo]

Yes: Price

[Horizons]

Thanks for the info. Does it look very difficult to replace these caps with Black Gate caps of a larger capacitance value?

Do you realize those caps are the value they are for a particular reason?

Yes, but most power supplies can be vastly improved by increasing the cap value by 1.5 or so and the quality of the cap can always be improved over mass market parts.

[mission777]

Some extra pictures:

there are 3 of those 8014's amplifier modules (not 6014)


The lsp output board


Under the U cooling pipe, view after removing the fan. It looks like ther is some capacitance here (the octagonal shiny pieces).

I measured the voltage over the ps caps. When idling it is about + and - 30-31 V.

I did some changes to the cooling (sorry no pictures) Not entirely happy with it, it still runs very warm.

[ooheadsoo]

What's the size of that fan?  I want to get a panaflow to replace it with.

[mission777]

What's the size of that fan?  I want to get a panaflow to replace it with.

edited : its about 60x60mm  The jvc fan has a max voltage of 12V (0,08A).
I tried to replace it with different ones.

The 50x50mm fits nicely close to the aluminium pipe. Bit its a bit too noisy.