LG PB60G Service Manual

1. Light measurement unit
Reference 1. Terminology
Classification MKS unit
Meaning
Luminous flux lm (lumen)
The amount of emitted light that is measured based upon CIE standard luminous efficacy and the maximum luminous
efficacy
2WhatisANSIlumen?
Luminous intensity cd (candela) = lm/sr A value that a speed of light, directed in any directions from the light source, is divided by a solid
angle.
Illuminance lx (lux) = lm/㎡ The amount of light entering per unit area (Light receiving part)
Luminance
cd/㎡ = cd/sr·㎡
The amount of emitted li
g
ht
p
er unit area and
p
er unit solid an
g
le
(
Li
g
ht emittin
g
p
art
)
2
.
What
is
ANSI
lumen?
• PJTR brightness standard unit establishing by ANSI(American National Standards Institute)
• A standard which entire luminous flux of projected light can be measured regardless of a level of uniformity
in order to correct the measurements caused by different measurement locations.
gp p g
(g gp )
→ Calculated luminous flux (unit lm) based upon the standard is called ANSI lm.
• Measurement procedure :
① Divide the projected screen into a nine equal size (Below figure)
② Measure a center illuminance at the 9 points and calculate the average (lx = lm / ㎡)
③
Calculate the projected screen size
(
㎡
)
③
Calculate
the
projected
screen
size
(
㎡
)
④ the calculated average from ② (lx = lm / ㎡) x projected screen size (㎡) = ANSI lm (lm)
* Projected screen size is not specified, but 40 inch projection is general.
Example) 40 inch (SIZE = 0.495 ㎡) when projecting, an average
lluminance 2,500 lx, .
▶ 2,500 ( lx ) x 0.495 (㎡) = 1,237.5 (lm) *
∴
1,237.5 ANSI lm
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
1,237.5
ANSI
lm

LG PB60G Specifications

General

Native aspect ratio	16:9
Projection distance	- m
Projection technology	DLP
Supported aspect ratios	4:3, 16:9
Contrast ratio (typical)	15000:1
Digital gamma correction	Yes
Screen size compatibility	25 - 100 \
Projector native resolution	WXGA (1280x800)
Lamps quantity	1 lamp(s)
Light source type	LED
Service life of light source	30000 h
Focus	Manual
Offset	100 %
Throw ratio	1.5:1
Focal length range	- mm
Full HD	No
Supported video modes	1080i, 1080p, 480i, 480p, 720p
Analog signal format system	-
Supported graphics resolutions	1280 x 720 (HD 720), 1280 x 800 (WXGA), 1680 x 1050 (WSXGA+), 1920 x 1080 (HD 1080), 854 x 480 (WVGA)
RMS rated power	2 W
Number of built-in speakers	2
Audio (L/R) in	3
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
S-Video inputs quantity	0
Noise level	31 dB
Certification	KC/KCC, FCC/UL
Noise level (economic mode)	26 dB
On Screen Display (OSD) languages	ARA, CHI (SIMPL), DEU, ENG, ESP, FRE, GRE, ITA, KOR, POL, POR, RUS, SWE, TUR
Placement	Desktop, Tripod
Product type	Standard throw projector
Product color	White
Cable lock slot type	Kensington
Power source	AC
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	60 W
Power consumption (standby)	0.5 W
Cables included	AC, Component
Operating temperature (T-T)	0 - 40 °C

Weight and Dimensions

Depth	103 mm
Width	158 mm
Height	33 mm
Weight	470 g