CurtPalme.com Home Theater Forum

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi everyone.

Another subject. Mr. Green

I hope I don't annoy you too much...
I'm going to change the fans of my 1292 but I'm looking for the most simple solution (direct connector compatibility if possible).
I've read some subjects here and there but opinions about the fans and methods of replacement vary significantly.

Thanks for your advices!

matt697845 · Joined: 25 May 2013 Posts: 39

Hi, not a CRT expert (yet) here but I've been building and working on PCs for many years now so I'll share my experience with fans.

Measure the voltage going into the fans with any multimeter, as long as its 12v DC or close, you can use standard 120 mm PC fans. The key is to use fans with same or at least very close CFM (cubic feet per minute) and static pressure rating (mmH2O). If you try and use fans with lower ratings, there's a good chance you'll burn up your projector. Also, don't get PWM (pulse width modulation) fans, those are designed specifically for use on PC motherboards or fan controllers with speed control. The 120 mm fans in your PJ are 38mm width rather than the more common 25mm width found in PCs.

Supposedly, the Sanyo Denki DC San Ace 109R has one of the best noise/pressure ratios available, and responds very well to under and over volting so you could easily reach the target CFM to keep the projector at a safe internal temp. Personally, I would buy 1 on ebay or something to start out with to see if they really are any better than the ones in the PJ, before I spent a lot of money on them as they are quite pricey.

As for hooking them up, if the connectors are not compatible all you'd have to do is splice the wires together. Red and black are + and - respectively, and yellow is speed monitoring which may or may not be needed for your 1292.

If looks like the 1292 has 12 fans total, 5 120x38mm, 5 80mm, and 2 92mm. All these are standard PC fan sizes.

Here's a thread form over 10 years ago about quieting the 1292, ultimately it looks like replacing fans could get real expensive real quick and have rather disappointing results, hush boxing seems like the best overall option if at all possible. Just keep an eye on those temps.

http://www.avsforum.com/t/243033/sony-1292-fan-mod-connection-points

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi matt,

Thanks for these informations.
Hushboxing seems indeed the most efficient solution and I'll apply it. But I want to change the fans before to improve the results.

The Sanyo fan is very noisy. I'll try Cougar or Noctua fans.
Red and black wires must be inverted in Sony PJ and the yellow connected to the black one. But what about the sense of rotation (aspiration / exhaust)? Is there just to return the fan?

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi,

After some researchs I decided to try these fans :

- for the 80mm & the 92mm : http://www.enermax.fr/produits/ventilateurs/docs/fp_TBSILENCE.pdf

- for the 120mm (thanks to nashou ) : http://www.ldlc.com/fiche/PB00132977.html

I don't know the specifications of the original fans but Enermax and Cougar fans seem silent and efficient.
What do you think about it?

**AnalogRocks** · Posted: Fri Jan 31, 2014 6:53 pm Post subject:

I would get one of each and do a side by side comparison old vs new fans to see if the new ones move as much air.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

TTHD · Joined: 07 Jan 2014 Posts: 82

Ordered.
Mounting in 5 or 6 days.

I've taken some measures with my sonometer today.
At 1m (circa 3 feet) :
- projector with case = 63dB
- projector without case = 60dB
- 120mm fan (DC Centaur 25 III) = 41-42dB
- 92mm fan (MMS-09B12DH) = 39-40dB
- 80mm fan (DC Pixie 25 III) = 36dB (but rotation speed is > 3000RPM).

kabuby77 · Joined: 28 Mar 2011 Posts: 147 Location: Italy

I mounted noctua fans, very reliable(6 years warranty) and quiet. They give you also two adapters with resistors to slow the speed.

TTHD · Joined: 07 Jan 2014 Posts: 82

I've ordered two Noctua 120mm (at a very very low price) to make a comparison with the Cougar.
I'll post the different measures..

Regards.

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi guys,

I've done the mod with Enermax and Cougar fans this evening.
These fans are deadly silent and I'm really satisfied.

The results :

At 1m (circa 3 feet) :
- projector with case = 48-49 dBA
- projector without case = 45-46 dBA
- 120mm fan (Cougar Vortex HDB CF-V12H) = 19-20 dB A
- 92mm fan (Enermax TBSILENCE) = 18 dBA
- 80mm fan (TBSILENCE) = 16-17dBA

Approximately -15dBA with 110$ for 12 fans. I hope to drop below 35 dBA with a soundproofed hushbox (wood+ foam-backed).

Bye.

ecrabb · Posted: Wed Feb 05, 2014 9:28 pm Post subject:

It's great that things are a lot quieter, but my concern if it's significantly quieter is that you're just not getting the same airflow and cooling as with the stock fans. This is especially concerning if you're going to put it in a hush box.

Most fans are pretty quiet in free air; it's when you put them in a chassis and they push air through the chassis and internals that the resulting turbulence is noisy. It's especially true with larger volumes of air. If it's that much quieter, I'd be worried you're not moving nearly as much air.

Did you happen to take any before/after temperature measurements?

SC

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Not bad!!! Glad the cougars worked. The other ones tho were a bit quieter.

COUGAR CFD120 Black HB Fan 120 x 120 x 25mm 1200RPM 64.37CFM 1.74mm H20 16dB

I know they are hard to find.

Nashou

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi ecrabb,

You're right, it's the air circulation in the chassis which is the most noisy. (+65dbA before and after fans mod behind the green tube)
The measures I've communicated concerning the fans have been taken in free air. So The Enermax and Cougar are very very less noisy than the original ones.

The specs of the new fans seem to be very good, in particular the two 120mm Cougar which are used for hot air exhaust.

I will take some temperature measures tomorrow.

Regards.

TTHD · Joined: 07 Jan 2014 Posts: 82

**AnalogRocks** · Posted: Thu Feb 06, 2014 3:32 am Post subject:

Did you check the internal temperatures before and after the fan change?

TTHD · Joined: 07 Jan 2014 Posts: 82

I have to make some temperature measurements to verify the new fans performances.
As soon as it's done, I'll post them.

Regards.

kabuby77 · Joined: 28 Mar 2011 Posts: 147 Location: Italy

The projector is cooled too much, and badly. You would have done better with half the fans, the only area really hot is that of neckboards. In fact, if you look at the g90, this part has been changed bringing out the heatsink.

TTHD · Joined: 07 Jan 2014 Posts: 82

Hi kabuby,

A projector, all the more a CRT, is never too much cooled! Mr. Green

I've already heard about this "overcooling" of the 1292. But it seems to me that overcooling is always better than undercooling.
When I have change the 2 front fans, I've switched the projector on without these fans at their positions (but connected). All I can say is that the gurts of the projector became hot in less than 1 minute.

Noise is an issue, but I prefer to hear air circulation than risk a breakdown. Wink

Bye.