Sanyo projector repair manual

Client hastens greatly, please help to solve problemma 2-3 days, if necessary will call - kintos in a personal phone, the call-back. 
Projector SANYO PROxtraX multiverse projector 
Problem is: the image brightness greatly underestimated. Monster with 2 bulbs of 300 watts and the image brightness of projectors is equal to 50-60 watt bulb. Brought to stravneniya Sony odnolampovy (300W lamp) - the brightness of a factor of 2 ludshe than this projector. 
Replacement lamps does nothing (native bulb is not passed, and 600 hours - from the words of the client). The optical channels have the dust, but its volume is very small to cause dakoy defect. Client to specify the brightness of the projector can not be lost (maybe the projector brightness is not lost for one day or a jump no one noticed). The projector uses a few mobile persons who may misuse occurred disconnecting from the network (without purge mode - cooling). Rechecked ballast, problemma not found. The voltage on the ballast 380 in operation (prekondey works fine). In the menu of the device adjust the brightness controls only the brightness of every LCD matrixes, the brightness of lamp is missing except for three items: 

1. normal 2. automatically 3. economically Change these items only leads to a drop in brightness. Switching to work with one lamp only leads to a decrease in brightness. Adjusting the aperture in the menu does not work. Discharges in the user menu, nothing. Curtains switching the passage of the light flux from the prismatic faucet from lamps before entering the optoblok - opened fully. There are 2 thoughts about problemma this unit: 1. Outta level of initial brightness setting bulbs (probably is in service mode) 2. There is a broken optical sensors regulate the brightness of the lamps (these are not found - optoblok apart I will not because of the ability to ditch the optical settings).