[General Discussion] QF001 (ROCO K706) Head Units with UIS 7862s (not FYT based) [read first post first]

[Aaantonn]

anyone can explain me what happend, because it is against the logic. I puted a cooper plate on cpu, i used mx4 paste (just i got it at home). And the temps are 46-48 in idle. erlier i had there a thermopad 6w/mk, and in the same condition the temps were 39-43. So I dissasembly it again, but everything look ok, the paste stick right. so I clean it, put a thermo paste again (on both side of cooper plate ofcourse). But the results are the same, pretty high temp in idle

There is logic. Now the processor and case have a common temperature, the case heats up from the power amplifier, it gets extra +10, but this operating temperature is completely normal. The operating temperature of the processor is up to about 70-80 degrees. The temperature has become higher, but now it is stable and there are no sharp jumps to 85-90 degrees and the processor will not go into throttling. You want stability, not low temperatures. My fan turns on at about 55 degrees and works up to 45, but I put the sensor on the case, near the copper plate, and therefore I see that the approximately set fan shutdown temperature is the same as the processor. Of course, there can be jumps, but they are not so high and frequent . I hope not a harsh answer, did not offend?))

 

[popamor]

There is logic. Now the processor and case have a common temperature, the case heats up from the power amplifier, it gets extra +10, but this operating temperature is completely normal. The operating temperature of the processor is up to about 70-80 degrees. The temperature has become higher, but now it is stable and there are no sharp jumps to 85-90 degrees and the processor will not go into throttling. You want stability, not low temperatures. My fan turns on at about 55 degrees and works up to 45, but I put the sensor on the case, near the copper plate, and therefore I see that the approximately set fan shutdown temperature is the same as the processor. Of course, there can be jumps, but they are not so high and frequent . I hope not a harsh answer, did not offend?))

@Aaantonn, I like your logic and explanation.
@marioti , are you seeing temp spikes? I'm almost at the verge of breaking down and taking the unit off of the car and doing some of the mods that you guys have done.

I am truly thankful for this thread.

 

[Clyde72]

@Aaantonn, I like your logic and explanation.
@marioti , are you seeing temp spikes? I'm almost at the verge of breaking down and taking the unit off of the car and doing some of the mods that you guys have done.

I am truly thankful for this thread.

Spikes are normal, but it always drops back to an average. I monitored & recorded temp for some time when driving and spikes occur only when e.g. opening nav & starting to navigate. Once navigating it goes back to average. All without even having the fan connected average is 41-43°C during all drives, even the longer ones. This is peanuts for an ARM architecture.

But I don't have camera's, and other imo futile wistles and bells who needs to be monitored by or control the unit - canbus is disconnected - so my unit gets hardly stressed or under heavy load. Nav & (streaming) music mainly when driving.

"The most dangerous thing with a moving car is the nut behind the steering wheel."

 

[marioti]

There is logic. Now the processor and case have a common temperature, the case heats up from the power amplifier, it gets extra +10, but this operating temperature is completely normal. The operating temperature of the processor is up to about 70-80 degrees. The temperature has become higher, but now it is stable and there are no sharp jumps to 85-90 degrees and the processor will not go into throttling. You want stability, not low temperatures. My fan turns on at about 55 degrees and works up to 45, but I put the sensor on the case, near the copper plate, and therefore I see that the approximately set fan shutdown temperature is the same as the processor. Of course, there can be jumps, but they are not so high and frequent . I hope not a harsh answer, did not offend?))

sorry for me. No offence.

On the thermopad and also on cooper plate, i have a spikes of temp. but they aren't big. The max. as i noticed, was ca. 65°C.

So if Clyde72 have average 41-43°C , it is strange to me that i have 47-48°C in idle, without anny app in background.
On march 7, i even wrote that with thermopad i have 38-41°C

I just discovered, that my housing is weird, it's not cover whole cpu, as yours. I have to figure out something.
About the temps.
Conditions: - in idle, on table (i can't test it in car yet), run google maps, the temperature between 38 to 41 C (shown on fan app)
But it can easly and fast jups between 38 do 56, if i just do any operations.

Definetley somethings went wrong in my case.

What are the temps. in your HU?

 

[Aaantonn]

I listen to music loudly, and bass is strong, so after a trip for 20-30 minutes I always have a fan running, only from Spotify music. after 30 minutes of work 45-55 degrees. But even after two hours with a navigator and music it is quiet, just 45-55 degrees. I check through AIDA 64. I set the fan to overclock from 50-70 degrees to the maximum, so the fan runs at minimum speed.
I don't even pay attention to temperature fluctuations. Since I work at a laptop, where the processor is as much as possible in the ass of the world and jumps when working with different programs, this is the norm.

 

[Clyde72]

sorry for me. No offence.

On the thermopad and also on cooper plate, i have a spikes of temp. but they aren't big. The max. as i noticed, was ca. 65°C.

So if Clyde72 have average 41-43°C , it is strange to me that i have 47-48°C in idle, without anny app in background.
On march 7, i even wrote that with thermopad i have 38-41°C


Definetley somethings went wrong in my case.

What are the temps. in your HU?

No idea if something is wrong, my unit is still stock + built in between climatronic & top vent ducts with airco always on when driving

 

[Aaantonn]

@Aaantonn, I like your logic and explanation.
@marioti , are you seeing temp spikes? I'm almost at the verge of breaking down and taking the unit off of the car and doing some of the mods that you guys have done.

I am truly thankful for this thread.

Perhaps nothing needs to be done. It’s just that I have an old version and the auto-on of the fan did not work at 50 degrees, although I didn’t try it on the new version of the MCU before the rework, perhaps the fan program would have worked. Since I dismantled the radio by installing a thermal sensor circuit, at the same time I made the cooling of the processor and power amplifier. I must say right away that it is not worth doing the cooling of the power amplifier, since the alteration is very complicated, just replace it with normal thermal paste. I didn’t post the power amp rework, I thought someone wouldn’t want to bother like that. And anyone can cool the processor and it helps not to overheat.
But I'm not saying that your radio will not work anyway! Perhaps everything will be fine and so, and alterations are not needed! I just like to disassemble something new and pick until I break it)

 

[Clyde72]

sorry for me. No offence.

On the thermopad and also on cooper plate, i have a spikes of temp. but they aren't big. The max. as i noticed, was ca. 65°C.

So if Clyde72 have average 41-43°C , it is strange to me that i have 47-48°C in idle, without anny app in background.
On march 7, i even wrote that with thermopad i have 38-41°C


Definetley somethings went wrong in my case.

What are the temps. in your HU?

I had another look. Don't worry as I was wrong, 47-48°C idle is not abnormal when driving, short temp spikes to 52-53°C when launching FM or nav and ounce running dropping quickly back to idle temp mid 40ties...

 

[marioti]

I had another look. Don't worry as I was wrong, 47-48°C idle is not abnormal when driving, short temp spikes to 52-53°C when launching FM or nav and ounce running dropping quickly back to idle temp mid 40ties...

I understand you. These temperature are ok. for the cpu,
but in my case idle temps. are higher ca 8-10°C, and all just because i added a copper plate instead thermopad.
Anyway, i'm planning to turn back to thermopad and will do more tests

 

[Meteordust]

I understand you. These temperature are ok. for the cpu,
but in my case idle temps. are higher ca 8-10°C, and all just because i added a copper plate instead thermopad.
Anyway, i'm planning to turn back to thermopad and will do more tests

This almost looks like that you don't have sufficient amount of cooling of the fan, due inside dashboard temperature or other reason like a poor fan, mean the copper plate on fan/ HU housing side must have more cooling capacity then cpu heating up the copper plate. It seems you "store" a lot of the heat in the copper plate and not cooling the copper plate enough, due heattransfer threw paste, copper, paste to housing.
Also only use very little amount of thermopaste.

I didn't do anything with my cpu, thermopad is still fiited from stock, in idle with Agama launcher with GPS speed in the middle of the screen, after some driving my cpu is around 41-45 degrees.
With radio on, Sygic nav on it is around 45-50 degrees, this with an inside car temperature around 23 degrees.

Mentioned before that after I putted the V2 Sunon 7500 rpm fan with 68 Ohm resistor (14 volt became 12.5 volt, I measured it) my average cpu temperature dropped almost 10 degrees, compared to the stock poor fan that was fitted.
Fitted in dashboard with engine off, no interior ventilation on, yes I hear the fan when I focus on it, like a very soft airflow sound.

Myself don't like the idea of switching on/ off the fan, Sunon says it will do 70000 hours, we all already took notice that the unit becomes hot around the area of the power plug, amplifier.
So like the idea of continious airflow in the HU housing and pushing the heat away form the cpu.

BTW I have the Jitu Opel S8 HU (8SOPEL7100B), not the universal S8.

 

[Clyde72]

This almost looks like that you don't have sufficient amount of cooling of the fan, due inside dashboard temperature or other reason like a poor fan, mean the copper plate on fan/ HU housing side must have more cooling capacity then cpu heating up the copper plate. It seems you "store" a lot of the heat in the copper plate and not cooling the copper plate enough, due heattransfer threw paste, copper, paste to housing.
Also only use very little amount of thermopaste.

I didn't do anything with my cpu, thermopad is still fiited from stock, in idle with Agama launcher with GPS speed in the middle of the screen, after some driving my cpu is around 41-45 degrees.
With radio on, Sygic nav on it is around 45-50 degrees, this with an inside car temperature around 23 degrees.

Mentioned before that after I putted the V2 Sunon 7500 rpm fan with 68 Ohm resistor (14 volt became 12.5 volt, I measured it) my average cpu temperature dropped almost 10 degrees, compared to the stock poor fan that was fitted.
Fitted in dashboard with engine off, no interior ventilation on, yes I hear the fan when I focus on it, like a very soft airflow sound.

Myself don't like the idea of switching on/ off the fan, Sunon says it will do 70000 hours, we all already took notice that the unit becomes hot around the area of the power plug, amplifier.
So like the idea of continious airflow in the HU housing and pushing the heat away form the cpu.

BTW I have the Jitu Opel S8 HU (8SOPEL7100B), not the universal S8.

I personally still plan on doing it that way (always on) but my Sunon fan wasn't delivered with my last electronics components order. It is in backorder. Once it arrives I only plan additionally the front mic mod.

I think you are correct that the copper plate keeps heat trapped in stead of it being dissipated.

 

[Meteordust]

I personally still plan on doing it that way (always on) but my Sunon fan wasn't delivered with my last electronics components order. It is in backorder. Once it arrives I only plan additionally the front mic mod.

I think you are correct that the copper plate keeps heat trapped in stead of it being dissipated.

Happily I ordered two, so have one for spare if my mounted one will fail...

Well I did the sticky tape thing on the flatcable for the mic, needed microscope glasses to fit the tape,
but done
This also works very well with external mic with an A-Pillar mounting, but I know you have a different situation with mounting the cable, it easilly done in my Opel..

 

[Aaantonn]

I personally still plan on doing it that way (always on) but my Sunon fan wasn't delivered with my last electronics components order. It is in backorder. Once it arrives I only plan additionally the front mic mod.

I think you are correct that the copper plate keeps heat trapped in stead of it being dissipated.

How can a copper plate retain heat and transfer worse than thermal pads? A copper plate is glued onto the chips instead of a radiator, very small, but it saves the chip. Copper has a hundred times greater thermal conductivity. This is a normal temperature and there is no tragedy. My temperature is always 45-55. Another question is that between the copper plate and the case,, I wrote that the best option is a thermal pad with a phase transition, and not glue of unknown origin. But I have a thermal interface left from a laptop.
What makes you think the temperature is high? We have already found out that three people have the same temperature. And how can the processor work and not heat up? This is the normal operation of the processor. I'll attach a screenshot of a laptop to you in single browser mode, only what size processor in a laptop plus two large fans, and you are worried about the radio. Everything with the radio will be fine. You have the highest temperature from the power booster, and at the same time, at 70 degrees, according to the manufacturer, it loses most of the power, but for some reason no one is worried about this. But the processor has only an operating temperature of -20 to +75 degrees, and the peaks can generally be 90 degrees. I would advise you to simply not pay attention until the processor goes into throttling and the radio tape recorder starts to blunt when overheated.

 

[Aaantonn]

Acer Predator laptop with two large fans in Browsing mode, the fans run at 2500 rpm. And in the radio there is one tiny and plastic case. Don't pay attention to the temperature at all.

 

[Meteordust]

How can a copper plate retain heat and transfer worse than thermal pads? A copper plate is glued onto the chips instead of a radiator, very small, but it saves the chip. Copper has a hundred times greater thermal conductivity. This is a normal temperature and there is no tragedy. My temperature is always 45-55. Another question is that between the copper plate and the case,, I wrote that the best option is a thermal pad with a phase transition, and not glue of unknown origin. But I have a thermal interface left from a laptop.
What makes you think the temperature is high? We have already found out that three people have the same temperature. And how can the processor work and not heat up? This is the normal operation of the processor. I'll attach a screenshot of a laptop to you in single browser mode, only what size processor in a laptop plus two large fans, and you are worried about the radio. Everything with the radio will be fine. You have the highest temperature from the power booster, and at the same time, at 70 degrees, according to the manufacturer, it loses most of the power, but for some reason no one is worried about this. But the processor has only an operating temperature of -20 to +75 degrees, and the peaks can generally be 90 degrees. I would advise you to simply not pay attention until the processor goes into throttling and the radio tape recorder starts to blunt when overheated.

It not really about what is acceptable regarding the working temperature of our CPU, but the question why @marioti has a situation that he gets higher temperatures with a copper plate.

@marioti

There is a difference between thermopad to housing with lets say 6 W/mk to housing, or thermopaste to copper to thermopaste to housing.
Most thermopaste has same heatransfer as a thermopad and a copper plate absorbs the heat in between of them.
Two times of thermopaste between cpu, copper and housing makes it worse then only a pad it seems, and higher peak temperatures.

There is no sufficient cooling capacity between all of them in his situation, otherwise @marioti would have much lower temperatures compared with only the stock thermopad fitted.
Also the copper plate must be fitted with some pushing force between the CPU/ housing with very thin layer of thermopaste, but that we can not create, we will bend the mainboard.

Copper also has a specific heat capacity (J/K.kg), mean you need the right cooling capacity to cool copper down 1 degree, the thermopaste between the copper and housing is blocking the cooling down, with respect to all other believers .

If I would make a modification for better cooling, I would make a hole like 12x12 mm in the housing on the spot where the CPU is fitted, stick a small 12x12 mm heatsink on the CPU and mount the fan a little higher in the housing.
Didn't measure the CPU in size, so could be 10x10, 12x12 or 14x14 mm.
And of course fix the heatsink that it will not drop of the CPU.
But the original situation makes it for me totally useless to fit anything, I watched many times my CPU temperatures, during driving, load radio, using navigation and never really saw it high above 50 degrees, in idle it jumps between 41-43 degrees on my HU.

 

[marioti]

anyone can explain me what happend, because it is against the logic. I puted a cooper plate on cpu, i used mx4 paste (just i got it at home). And the temps are 46-48 in idle. erlier i had there a thermopad 6w/mk, and in the same condition the temps were 39-43. So I dissasembly it again, but everything look ok, the paste stick right. so I clean it, put a thermo paste again (on both side of cooper plate ofcourse). But the results are the same, pretty high temp in idle

I don't know what to say.
Thermopad, in idle, no app in background (like before), after ca. 20min
Only when an app starts (eg. google maps navigation), the temp peaks to max 62°C (as i notice), and then dropping down quickly max 46-47°C
One more thing, the cpu temp in fan app, show temporarily different to real cpu temp. See the second pic. It is just example, but you can see in fan app 49°C, and the system shows 51°C

 

[Aaantonn]

You are comparing the CPU temperatures of Clyde and Marioti. Clyde's post says S4, and he has S8. I think it has a uis7862s 2GHz processor that runs at high temperatures, it's not even a uis78621 1.8 GHz processor. Mariote has one of the top processors on the market today and runs at higher temperatures than usual. Here is a photo with the temperature of my system before installing the copper plate, just with the manitol turned on for some time without heavy load and without a bunch of background programs. I put a copper plate, specially checked the temperature yesterday and it is 55-60 degrees throughout the day with the music turned on. Processor uis7862s. It is not correct to equate two different processors.
I already told you that in my CORE I7 8th laptop, this is not a simple processor that does not work on thermal paste, it only needs a phase transition thermal pad, any paste drains in 4 days from high temperatures. The same thing here, these are completely different temperatures and you should not worry about them until the radio freezes.
For information, I’ll say that you can’t press the processor at all, soldering points can fly off when the temperature rises. To prevent this from happening, you need a 0.2 mm thermal pad on the processor and on top of the copper plate, 0.4 mm comes out, or just a 1.5 mm thermal pad without a plate. Most likely, for this reason, it was installed initially, but my radio tape recorder did not have anything. Just because my radio had a gap of 1.4mm, without thermal pads, I decided to make a copper plate, but in the post above I clarified that you can just use a thermal pad if you don’t want to bother. But a copper plate can't be worse if done right.

 

[Clyde72]

I don't know what to say.
Thermopad, in idle, no app in background (like before), after ca. 20min
Only when an app starts (eg. google maps navigation), the temp peaks to max 62°C (as i notice), and then dropping down quickly max 46-47°C
One more thing, the cpu temp in fan app, show temporarily different to real cpu temp. See the second pic. It is just example, but you can see in fan app 49°C, and the system shows 51°C

I also notice the app showing 12 V dc which also doesn't match reality when having the car motor running.

And possibly that overvoltage is the reason why @blue_one had his stock fan dying in record time to begin with... (reported months & months ago meanwhile).

So we agreed a possible workable solution is by using a resistor so the fan can stay on at all times making sure the cpu o.a. won't ever overheat & keeping the fan alive with normal usage. Plus reducing fan noise in the process. Minor mod & kiss proof (keep it simple & stupid). Thx @Meteordust here for the testing etc. btw.

I personally don't plan on putting heavy load on cpu & gpu by e.g. watching high res (streaming) video while driving. Not even low res, I plan on concentrating on the road and traffic as it is supposed to when driving a car etc . That I find at times exiting enough with all those nuts thinking they are the kings (of the road a.o.).

 

[Meteordust]

You are comparing the CPU temperatures of Clyde and Marioti. Clyde's post says S4, and he has S8. I think it has a uis7862s 2GHz processor that runs at high temperatures, it's not even a uis78621 1.8 GHz processor. Mariote has one of the top processors on the market today and runs at higher temperatures than usual. Here is a photo with the temperature of my system before installing the copper plate, just with the manitol turned on for some time without heavy load and without a bunch of background programs. I put a copper plate, specially checked the temperature yesterday and it is 55-60 degrees throughout the day with the music turned on. Processor uis7862s. It is not correct to equate two different processors.
I already told you that in my CORE I7 8th laptop, this is not a simple processor that does not work on thermal paste, it only needs a phase transition thermal pad, any paste drains in 4 days from high temperatures. The same thing here, these are completely different temperatures and you should not worry about them until the radio freezes.
For information, I’ll say that you can’t press the processor at all, soldering points can fly off when the temperature rises. To prevent this from happening, you need a 0.2 mm thermal pad on the processor and on top of the copper plate, 0.4 mm comes out, or just a 1.5 mm thermal pad without a plate. Most likely, for this reason, it was installed initially, but my radio tape recorder did not have anything. Just because my radio had a gap of 1.4mm, without thermal pads, I decided to make a copper plate, but in the post above I clarified that you can just use a thermal pad if you don’t want to bother. But a copper plate can't be worse if done right.

You......I assume me...

My point is from my experience after using this device for 3 months now, there is no need at all to do anything about the cooling of the CPU...my S8 has not high temperatures or spikes ,..and a copper plate after you mentioned it first I thought yes a good idea, but after reading @marioti tests and some thinking it is clear for me that after all it will not be my choice.
It creates more contact surfaces to transport the heat threw.

But it is a free world, everbody can make choices he want .

 

[Barykelo]

I don't know if this has already been addressed here, but on my Hizpo S5 4/64, TXZ regularly stops working for me every time I start android and then connect to wifi. The seller sent me the new firmware from 3/2023, but the message still appears. Don't know what to do with it? Thank you