Question on L4.49

[AVJohnnie]

Anyone here happen to know if L4.49 did something to reduce the 622’s internal cooling fan speed by a few rpms? Both of my 622s seem to be running a few degrees warmer than they normally do.

[ebaltz]

Maybe that is what the issue is with the reboots. Although mine still run cool because of the air flow I have for them. But it would make sense that some internal part gets too hot after awhile.

[Ron Barry]

Not sure Johnny and definitely an interesting theory... The other point is that it is getting warmer in SoCal. My HT cabinet has been warmer the last few weeks..

[AVJohnnie]

Not sure Johnny and definitely an interesting theory... The other point is that it is getting warmer in SoCal. My HT cabinet has been warmer the last few weeks..

Neither of my 622s are in cabinets. Each sits atop a display table with no other equipment, heat sources, or other obstructions around it. I keep the room air temperature within a range of 68°-75°F year round.

[tnsprin]

Anyone here happen to know if L4.49 did something to reduce the 622’s internal cooling fan speed by a few rpms? Both of my 622s seem to be running a few degrees warmer than they normally do.

1) the cooling fan actually rarely is on.

2) I don't know about the Dish receivers, but most other Computer devices I know of do not control their fans by software, but by hardware and temperature sensors.

[AVJohnnie]

1) the cooling fan actually rarely is on.

Interesting – Having never seen the innards of a 622 (mine or anyone else’s), perhaps you can answer a question – Is there more than one cooling fan; such as a CPU fan as well as a chassis fan, and perhaps even a GPU/Vproc fan? My guess is that there's only the one chassis fan and that everything that's a heat generation concern has been well heat synced to take advantage of that common airflow supply path.

On both of my 622s what I assume to be the chassis fan runs continuously at low rpm – drawing air in at the right side near the front and exhausting it all along the left side of the receiver. The only time I ever hear that fan accelerate to a higher rpm is during a reboot cycle, shortly after which it resumes its (normal?) low rpm state. But I've never known it to be turned off completly.

[tnsprin]

Interesting – Having never seen the innards of a 622 (mine or anyone else’s), perhaps you can answer a question – Is there more than one cooling fan; such as a CPU fan as well as a chassis fan, and perhaps even a GPU/Vproc fan? My guess is that there's only the one chassis fan and that everything that's a heat generation concern has been well heat synced to take advantage of that common airflow supply path.

On both of my 622s what I assume to be the chassis fan runs continuously at low rpm – drawing air in at the right side near the front and exhausting it all along the left side of the receiver. The only time I ever hear that fan accelerate to a higher rpm is during a reboot cycle, shortly after which it resumes its (normal?) low rpm state. But I've never known it to be turned off completly.

At one time I also thought it always ran, but after a dialog on another thread that said otherwise, I confirmed that it does not run. I have since been able to confirm at least two speeds. Shine a light in the right side. Those who have taken it apart have only mentioned one fan.

[wje]

Interesting – Having never seen the innards of a 622 (mine or anyone else’s), perhaps you can answer a question – Is there more than one cooling fan; such as a CPU fan as well as a chassis fan, and perhaps even a GPU/Vproc fan? My guess is that there's only the one chassis fan and that everything that's a heat generation concern has been well heat synced to take advantage of that common airflow supply path.

There's only one fan. It's on the right-hand side (looking from the front). It draws air in from the right and blows it over the hdd, exhausting out the left. Contrary to some statements to the contrary, it is variable speed. It usually runs at a low rpm, but it runs at high rpm on boot (the 747 takeoff mode). If it's cool enough, it doesn't run at all.