Silencing the beast

I carried out the mods by Specboy on AVS another 1292 owner.

I heard is projector and it is very very quiet.

As with all the mods below do them at your own risk.

Voltage regulator Mod

This mod utilises a LM7809 series voltage regulator and a couple of capacitors on each of the 12 original fans to lower the speed/noise.

ONLY DO THIS FULL MOD ON A 1292 IF YOU ARE IN AN AIRCONDITIONED ROOM.

AMBIENT TEMPERATURE APPROX 23 degC.

* Keep electrolytic caps close to the regulator

* Only use this mod on fixed speed fans not variofans. Variofans have a black sensor attached on a flylead (only for other sony 12xx projector the 1292 does not have variofans)

*For 80mm Fans no heatsink is required for regulator

(I carried this mod out on my old 1252, it made a hugh difference to is noise level)

So Far I have only modified the 2 powersupply fans, the 3 fans on the rear and the 2 exhaust fans with this regulator mod.

I have not modified the 3crt fans or the 2 rear side fans yet, as I intend to replace these with quieter fans of equal or better airflow.

At high resolutions eg 1080p the neck boards get pretty warm.

Below is a link to a thread on AVS about 1292 Fan mods >>>Just how loud is the sony1292Q<<<

 Original Fan Specs

2 (92mm x 92mm x 25mm) intake fans on the power supply:

5 (80mm x 80mm x 25mm) intake fans: 3 at the read and 2 on the rear sides
DC brushless
DCPixie25 III
model PUDC12B4VS-958
DC 12V 0.14A 1.5W
Japan servo co., LTD
Made in Singapore UDO2903-6

operate at what the manufacturer calls full speed (2800 rpm) for 33 cubic feet per minute of airflow each at 31 decibels.

3 (120mm x 120mm x 25mm) intake fans behind CRTs:
MMS-09B12DH
12VDC 0.22A
5Z25C1 RCO
Optec Dahchi Denko Co. LTD
Made in Japan

2 (120mm x 120mm x 38mm) exhaust fans:
DC Centaur 25 III
Model CUDC12D4VS-947
DC Brushless
DC12V 0.16A 2W
Japan servo co., LTD
Made in Singapore
operate at what the manufacturer calls half speed (1950 rpm versus 2650 rpm) for 60 cubic feet per minute of airflow (!) each at 34 decibels.