PG-M10XE (serv.man4). Disassembly reassembly, Replacing the lamp, Block diagram of optical system principle, Optical adjustment measuring, Safety device, Troubleshooting table - Sharp Projector Service Manual (repair manual). Page 9

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1. Personal computer (run on Windows 95/98)
2. Projection screen (normally white)
3. Light distribution point display program (Lumens.exe program commonly used for both models UP and U2)
4. Illumination meter

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 Measuring lumen value

Connect the projector to the PC, and starts lighting.
Start up the light distribution point display program
(Lumens.exe) on the PC.  Make the room dark.  (A
darkroom is recommended.)  Measure the illuminance
at the nine points shown at right.  Put the measured
illuminance into the following equation to obtain the
lumen value.

Lumen value (L)

= (Average illuminance of 9 points) x (Projected area in m

2

)

={(P1+P2+ • • • +P9) / 9} x (A xB)

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Put the measured illuminance into the following equation to obtain the evenness of illuminance.

Evenness of illuminance (%) = (The lowest illuminance measured out of 9 points) / (Average illuminance of 9 points)

= [MIN.(P1~P9) / {(P1+P2+ • • • +P9) / 9}] x 100

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Put the measured illuminance into the following equation to obtain the peripheral illuminance ratio.

Peripheral illuminance ratio (%) = (Average illuminance at P1, P3, P7 and P9) / (Illuminance at P5)

= {(P1+P3+P7+P9) / 4} / P5] x 100

The factory settings are as follows.

Model PG-M10X

Lumen value: Min. 500 Lm

Evenness of illuminance: Min. 50%

Peripheral illuminance ratio: Min. 80%

Model PG-M10S

Lumen value: Min. 500 Lm

Evenness of illuminance: Min. 50%

Peripheral illuminance ratio: Min. 80%