All stock codes associated to this product
PTDZ870EK, PT-DZ870EK, 13PTDZ870EK, 13PT-DZ870EK, 5025232738380
PT-DZ870EK1-Chip DLP Projector
8,500 Lumens WUXGA
Overview
Vivid Picture Quality With High Brightness
The new PT-DZ870EK Series features many of the advanced functions in Panasonic’s flagship 3-chip DLP™ Projectors. With its superior performance and expanded application flexibility, the Series will set a new standard for 1-chip DLP™ Projectors.
Bright 8,500 lm From a Compact Body
A unique Dual Lamp drive system has helped to make the body compact, while two newly developed, high output, 420 W Lamps provide high brightness of 8,500 lm.
Dynamic Iris For A High 10,000:1* Contrast Ratio
Panasonic’s Dynamic Iris uses a scene-linking aperture mechanism to achieve a remarkable 10,000:1* contrast without lowering its high brightness. This helps to reproduce deeper, richer blacks, and provides images with more detailed textures.
The New Dynamic RGB Booster Enhances Both Brightness And Colour Reprodction
Panasonic’s RGB Booster achieves high image quality with levels of colour reproduction and brightness that make each colour stand out. It combines Panasonic’s proprietary Vivid Colour Control technology with a Lamp Modulation Drive System for a 1-chip DLP™ Projector that produces bright and vivid colours. This has been further advanced in the PT-DZ870EK Projectors with the development of the Dynamic RGB Booster. Images are analysed frame by frame, and scene-linking and real time modulation are used to achieve high brightness and vivid colour reproduction.
Conventional System
Because the Lamp power was fixed, colour reproduction was enhanced by sacrificing brightness.
Dynamic RGB Booster
Images are analysed frame by frame, and the Lamp output is modulated to match each scene. This achieves optimal brightness and colour reproduction for a wide variety of scenes.
Lamp Modulation Drive System
With the advanced Lamp Modulation technology, the Projector is able to control the Lamp intensity for each of the red, green, blue, and white segments of the colour wheel separately. Because the actual light output is controlled in relation to each colour segment, light usage is optimised and colour balance is obtained without lowering the brightness. This results in bright vivid images with increased colour fidelity.
Detail Clarity Process 3 Gives Natural Clarity To Even The Finest Details
This unique Panasonic circuit optimises the sharpness of each image, based on the super high, high, medium, and low frequency components of the extracted image information. The resulting images have a more natural, lifelike expression.
System Daylight View 2 for Enhanced Colour Perception
This unique Panasonic technology optimises image quality to improve the colour perception of the projected image in bright rooms. With a brightness of 8,500 lm, it provides highly comfortable viewing even in bright lighting, and allows viewers to concentrate easily on the images.
DICOM Simulation Mode
This imaging mode is similar to DICOM Part 14, which is a medical imaging standard. It reproduces x-ray images with remarkable clarity.
This product is not a medical instrument. Do not use it for actual medical diagnosis.
Rec,709 Mode For HDTV Projection
Optimal colour reproduction can be achieved by selecting this mode, compliant with ITU-R Recommendation BT.709, when images from an HDTV source are projected.
Waveform Monitor Function
When the output level of the source device fluctuates due to the performance of the device or its cable connections, the original black and white levels of the image content cannot be reproduced correctly. With the PT-DZ870EK Series Projector you can view the waveforms on the screen and adjust the settings either automatically or manually as you prefer.
Full-HD Ready WUXGA Resolution
The PT-DZ870EK features native WUXGA resolution for Full HD viewing.
This brings you lifelike projection of intricate, highly detailed images.
Advanced Technologies For Excellent Image Quality
3D Colour Management System
Full 10-bit Image Processing
Progressive Cinema Scan (3:2 Pull Down)
Dynamic Sharpness Control
Digital Noise Reduction
IP Conversion
AI Scene Control
2:2 Pull Down Mode
sRGB Compatibility
Panasonic's Original Dual Lamp System
This system eliminates the interruption if a Lamp should fail (in Dual-Lamp operation mode). The Lamp Relay mode also operates the Lamps alternately to enable 24/7 projection.*
If the Projector is to be operated continuously 24 hours a day / 7 days a week, use the Dual-Lamp optical system’s alternating Lamp operation (lamp changer) function. The Projector cannot be operated continuously 24 hours a day / 7 days a week in Dual-Lamp mode. Allow a minimum of two hours per week of non-operation time per Lamp if using the Dual-Lamp mode.
Long Lamp Life Contributes To Low TCO
The PT-DZ870EK Series Projectors lower the total cost of ownership because they have a Lamp replacement cycle of up to 4,000 hours.*
With the LAMP POWER set to ECO mode in Dual Lamp operation. The usage environment affects the Lamp replacement cycle.
Filter Less Dust Resistant Optical Engine
A Heat Pipe Cooling System Maintains Stable Operation up to 45°C
A new optical cooling system featuring a heat pipe block suppresses temperature rises inside the Projector and allows stable operation up to an ambient temperature of 45°C (113°F).* The use of this heat pipe cooling system also achieves quiet operation, enabling viewers to concentrate on the presentation or on quiet movie scenes.
The operating temperature range is 0°C to 45°C (32°F to 113°F) when used in locations from 1,400 m to 2,700 m (4,953 ft to 8,858 ft) above sea level. If the ambient temperature exceeds 35°C (95°F), the light output may be reduced to protect the Projector.
Dust Resistant Optical Block
The optical block, the heart of the Projector, is hermetically sealed to resist the effects of dust and other particles in the air, which makes it possible to remove the Air Filters for optics. It also contributes to the low TCO.
Easy Lamp Replacement
For easier maintenance, you can replace the Lamp from the rear. This makes it easy to replace a Lamp unit while the Projector is still in the mounting bracket or dual stacked.
The Lamp Filter must be replaced at the same time as the Lamp.
DIGITAL LINK Transmits Digital Signals up to 100m (320ft) With A Single Cable
DIGITAL LINK - The Single Cable Solution
Equipped with a DIGITAL LINK terminal, the PT-DZ870EK Series allows transmission of HDMI, uncompressed HD digital video and control signals (Ethernet, RS-232C) for up to 100 metres (328 feet) through a single CAT5e (STP) cable or higher. This simplifies cabling and system upgrades, making it ideal for ceiling mounted and other permanent installations.
Note: Audio signals cannot be transmitted because the PT-DZ870EK Series has no speaker or audio output terminal.
Optional ET-YFB100G Digital Interface Box for Easy Setup
By combining the optional ET-YFB100G Digital Interface Box, with its HDMI and other input terminals, uncompressed HD digital video and control signals can be transmitted up to 100 m (328 feet) over a single CAT5e (STP) cable or higher. It allows Projector connection with only one cable, making it ideal for ceiling mounted and other permanent installations.
Also, because control signals can be simultaneously transmitted, the ET-YFB100G input signal can easily be switched with the wireless Remote Control that is included with the Projector. The Projector can be controlled by either serial or LAN communication.
Also Supports Other Manufacturers’ Peripheral Equipment
DIGITAL LINK is an original function added to technology based on the transmission standards used in Crestron’s DigitalMedia 8G+, Extron’s XTP Systems, etc. Used together with the new ET-YFB100G Digital Interface Box, or other compatible equipment, the installation of this Projector is easier than ever, without any need for external receivers.
Art-Net* Compatible
The PT-DZ870EK Series Projector is compatible with the Art-Net protocol for lighting management.
Art-Net compatibility lets you connect the Projector to the lighting console, and operate functions such as shutter on/off, input change, power on/off, etc., together with the light control.
Art-Net is a protocol for transmitting the lighting control protocol DMX512 over the Ethernet.
Multi-Screen Support System Seamlessly Connects Multiple Screens
The Multi-Screen Support System optimally adjusts multiple screens: Edge Blending, Colour Matching and Multi-Screen Processor.
Edge Blending
The edges of adjacent screens can be blended and their luminance controlled.
Colour Matching
This function corrects for slight variations in the colour reproduction range of individual Projectors. The PC software assures easy, accurate control.
Multi-Screen Processor
The PT-DZ870EK Series Projectors can project large, multi-screen images without any additional equipment. Up to 100 units (10 x 10) can be edge-blended at a time.
Multi-Unit Brightness Control
This function automatically corrects the brightness fluctuations that occur over time in the individual Projectors of a multi-screen system. Up to eight Projectors can be controlled by connecting to each other via a hub, and this can be increased to a maximum of 2,048 Projectors by using
Multi-Unit Brightness Control
Geometric Adjustment For Specially Shaped Screens (PT-DZ870EK)
This function adjusts the image for projection onto spherical, cylindrical and other specially shaped screens. You can make the adjustment easily using only the Remote Control, with no external equipment needed.
New 4-Corner Adjustment and Keep Aspect Off functions also simplify fine adjustment.
Optional Upgrade Kit (ET-UK20) Featuring Geometry Manager Pro (PT-DZ870EK)
The new Geometry Manager Pro software included in the optional upgrade kit ET-UK20 supports Colour Matching, Edge Blending, Uniformity Correction, and other useful functions for Multi-Projector set ups (max. 32 units).
It also allows creative masking using four lines or bitmap data. And its flexible and complex geometric adjustment capability suits a wide variety of screen shapes.
Active 3D Projection Capability
The series is compatible with both passive and active 3D projection systems.
It combines with either a separate, external 100/120/144 Hz drive with IR emitter and active shutter glasses, or an active filter and passive glasses, for viewing 3D images.
Active 3D Projection Capability
Frame Sequential
Images for each of the left and right eyes are transmitted, alternately at the rate of 60 frames per second.
Frame Packing
Images for the left and right eyes are transmitted in one frame, while the resolution for each remains as it is.
Side by Side
Images for the left and right eyes are transmitted in one frame, while horizontal resolution is reduced by half.
Top and Bottom
Images for the left and right eyes are transmitted in one frame, while the vertical resolution is reduced by half.
Line by Line
Images for the left and right eyes are allocated, to odd numbered lines and even numbered lines.
Simultaneous
Images for the left and right eyes are transmitted by using two cables.
Flexible Installation
The wide adjustment range of the powered
horizontal / vertical lens shift function can be easily adjusted with the Remote Control. The unit can also be rotated 360° vertically, to accommodate various installation conditions. The lens centered design contributes to easy installation.
Portrait Mode Capability (optional)
Portrait projection is possible by mounting the optional
ET-LAD120P or ET-LAD120PW Lamp units, updating the Projector's firmware to MAIN Ver. 2.00 or later, and installing the Projector with its terminal side surface facing downward. Portrait mode adds more solutions for projection mapping, staging, and other needs.
Note: Please contact your sales representative for information on portrait orientation.
(Contact Information)
Please contact the sales representative with regard to the frame for portrait orientation. Installation is possible only with the terminal side facing downward. Horizontal rotation and vertical rotation are both limited to 15 degrees. Also, the Lamp replacement cycle is 1,000 hours with the LAMP POWER set to NORMAL mode in Dual Lamp operation, and is affected by the usage environment.
To check the firmware version, press the button on the Remote Control. [MAIN VERSION] of the firmware can be checked on the [STATUS] menu screen.
The ET-LAD120P and ET-LAD120PW cannot be used when the Projector is in landscape orientation.
Multiple Terminals With HD-SDL Compatibility
The PT-DZ870EK Series has an array of terminals, including 3D sync, DVI-D and HDMI terminals.
The PT-DZ870EK also features an SDI (SD-, HD-, and 3G-SDI) input terminal.
Easy Remote Monitoring And Control Over a LAN
Web browser on a Computer connected through a wired LAN system lets you remotely operate Projectors and check their status. An email messaging function can also notify you when a Lamp needs replacement, and indicate the overall Projector status.
In addition, Multi Projector Monitoring and Control Software is available for monitoring and controlling multiple Panasonic Projectors from a single PC.
The wired LAN terminal is compatible with PJLinkâ„¢ (class1), an open protocol that is used by many manufacturers, to enable integrated control of systems that contain different brands of Projectors.
A Wide Selection Of Optional Lenses
Choose from a wide line up of lenses for your system, including Long Throw Zoom Lenses and an Ultra Short Throw Lens for rear projection use. The additional Lenses make it easy to adapt your Projector to the installation site. The Lenses attach and detach with one-touch ease.
Panasonic’s new ET-DLE030 ultra-short-throw lens enables 100-inch projection from a 0.82 m (2.7 ft) distance.** It’s a powerful solution for the hassles of installation in a narrow space.
For detachable lenses as of July 2013.
For the PT-DZ870. 0.86 m (2.8 ft) for the PT-DW830 and 0.80 (2.6 ft) for the PT-DX100. The distance measures from the mirror surface to the screen.
Requires sufficient airflow space around the projector. This throw distance shows the case of the PT-DZ870.
For example, promotional images can be projected even in thenarrow space of a retail store showcase, where image projection is not possible with a general-purpose lens.
NOTE: The usage examples shown above are simulated images.
Other Valuable Features
P-in-P Function*
Mechanical Lens Shutter with Fade In/Out Effect
Scheduling Function
Direct Power Off
30 m Long-Range Wireless Remote Control
Anti-Theft Features with Chain Opening
Control Device Setup Function
ID Assignment for Up to 64 Units
Built-In Test Pattern
Selectable 10-Language On-Screen Menu(English, German, French, Spanish, Italian,Portuguese, Russian, Japanese, Chinese, Korean)
RoHS Directive Compliant
This function cannot be used with some input signals and selected inputs
Specifications
Power supply |
120-240 V AC, 10-5.2 A, 50/60 Hz |
Power consumption |
1,030 W (1,060 VA)
(0.3 W when STANDBY MODE set to ECO*1, 3 W when STANDBY MODE set to NORMAL) |
Dissipation BTU |
3,516 BTU/hour (without light PT-DZ870/DW830: 3,400 BTU/hour, PT-DX100: 3,379 BTU/hour) |
DLPâ„¢ chip |
Panel size |
17.0 mm (0.67 in)
diagonal (16:10 aspect ratio) |
Display method |
DLPâ„¢ chip x 1, DLPâ„¢ projection system |
Pixels |
2,304,000 (1,920 x 1,200) pixels |
Lens |
PT-DZ870/ DW830/ DX100 |
Powered zoom (throw ratio 1.7-2.4:1),
powered focus F 1.7-1.9, f 25.6-35.7 mm |
PT-DZ870L/ DW830L/ DX100L |
Optional powered zoom/focus lenses and fixed-focus lens |
Lamp |
420 W UHM lamp x 2 |
Screen size (diagonal) |
1.27-15.24 m (50-600 in), 1.27-5.08 m
(50-200 in) with the ET-DLE055, 2.54-8.89 m (100-350 in) with the
ET-DLE030, 16:10 aspect ratio |
Brightness*2 |
8,500 lm (dual-lamp, LAMP MODE: NORMAL) |
Center-to-corner uniformity*2 |
90% |
Contrast*2 |
10,000:1 (full on/full off, in dynamic iris 3 mode) |
Resolution |
1,920 x 1,200 pixels |
Scanning frequency |
SDI |
3G-SDI |
SMPTE ST 424 compliant, [RGB 4:4:4
12-bit/10-bit] 1125(1080)/60i, 1125(1080)/50i, 1125(1080)/25p,
1125(1080)/24p, 1125(1080)/24sF, 1125(1080)/30p, [YPBPR 4:2:2 10-bit]
1125(1080)/60p, 1125(1080)/50p |
HD-SDI |
SMPTE ST 292 compliant, [YPBPR 4:2:2 10-bit]
750(720)/60p, 750(720)/50p, 1125(1035)/60i, 1125(1080)/60i,
1125(1080)/50i, 1125(1080)/25p, 1125(1080)/24p, 1125(1080)/24sF,
1125(1080)/30p |
SD-SDI |
SMPTE ST 259 compliant, [YCBCR 4:2:2 10-bit] 525i(480i), 625i(576i) |
HDMI/DVI-D |
fH: 15-100 kHz, fV: 24-120 Hz, dot clock: 25-162 MHz |
RGB |
fH: 15-100 kHz, fV: 24-120 Hz, dot clock: 162 MHz or lower |
YPBPR (YCBCR) |
fH: 15.75 kHz, fV: 60 Hz [480i (525i)]
fH: 15.63 kHz, fV: 50 Hz [576i (625i)]
fH: 45.00 kHz, fV: 60 Hz [720 (750)/60p]
fH: 33.75 kHz, fV: 60 Hz [1035 (1125)/60i]
fH: 28.13 kHz, fV: 50 Hz [1080 (1125)/50i]
fH: 27.00 kHz, fV: 24 Hz [1080 (1125)/24p]
fH: 33.75 kHz, fV: 30 Hz [1080 (1125)/30p]
fH: 56.25 kHz, fV: 50 Hz [1080 (1125)/50p]
fH: 31.50 kHz, fV: 60 Hz [480p (525p)]
fH: 31.25 kHz, fV: 50 Hz [576p (625p)]
fH: 37.50 kHz, fV: 50 Hz [720 (750)/50p]
fH: 33.75 kHz, fV: 60 Hz [1080 (1125)/60i]
fH: 28.13 kHz, fV: 25 Hz [1080 (1125)/25p]
fH: 27.00 kHz, fV: 48 Hz [1080 (1125)/24sF]
fH: 67.50 kHz, fV: 60 Hz [1080 (1125)/60p] |
Video/YC |
fH: 15.75 kHz, fV: 60 Hz [NTSC/NTSC4.43/PAL-M/PAL60],
fH: 15.63 kHz, fV: 50 Hz [PAL/PAL-N/SECAM] |
Optical axis shift*3 |
Vertical |
+50 % from center of screen (powered) |
Horizontal |
±10 % from center of screen (powered) |
Keystone correction range |
Vertical ±40°*5*6,
horizontal ±15°*7*8 |
Keystone correction range with the optional upgrade kit ET-UK20*10 |
Vertical ±45°*6*11,
horizontal ±40°*8*12 |
Installation |
Ceiling/floor, front/rear |
Terminals |
SDI IN |
BNC x 1 (3G/HD/SD-SDI) |
HDMI IN |
HDMI 19-pin x 1 (Deep Color, compatible with HDCP) |
DVI-D IN |
DVI-D 24-pin x 1 (DVI 1.0 compliant, compatible with HDCP, compatible with single link only) |
RGB 1 IN |
BNC x 5 (RGB/YPBPR/YCBCR/YC x 1) |
RGB 2 IN |
D-Sub HD 15-pin (female) x 1 (RGB/YPBPR/YCBCR x 1) |
3D SYNC 1 IN/OUT |
BNC x 1 (3D timing signal) |
3D SYNC 2 OUT |
BNC x 1 (3D timing signal) |
VIDEO IN |
BNC x 1 (composite video) |
SERIAL IN |
D-sub 9-pin (female) x 1 for external control (RS-232C compliant) |
SERIAL OUT |
D-sub 9-pin (male) x 1 for link control |
REMOTE 1 IN |
M3 x 1 for wired remote control |
REMOTE 1 OUT |
M3 x 1 for link control (for wired remote control) |
REMOTE 2 IN |
D-sub 9-pin (female) x 1 for external control (parallel) |
LAN / DIGITAL LINK |
RJ-45 x 1 (for network and DIGITAL LINK
(video/network/serial control) connection, 100Base-TX, compatible with
Art-Net, compliant with PJLinkâ„¢, Deep Color, compatible with HDCP) |
Cabinet materials |
Molded plastic |
Dimensions (W x H x D) |
PT-DZ870/ DW830/ DX100 |
498 x 200*8 x 556 mm (19-19/32 x 7-7/8*13 x 21-7/8 in) (with supplied lens) |
PT-DZ870L/ DW830L/ DX100L |
498 x 200*8 x 513 mm (19-19/32 x 7-7/8*13 x 20-3/16 in) (without lens) |
Weight*14 |
PT-DZ870/ DW830/ DX100 |
Approximately 18.3 kg (40.3 lbs) (with supplied lens) |
PT-DZ870L/ DW830L/ DX100L |
Approximately 17.6 kg (38.8 lbs) (without lens) |
Operation noise*2 |
40 dB (dual lamp operation, lamp mode: NORMAL),
35 dB (dual lamp operation, lamp mode: ECO) |
Operating environment |
Operating temperature: 0-45 °C (32-113 °F)*15,
operating humidity: 10-80 % (no condensation) |
Applicable software |
Logo Transfer Software,
Multi Projector Monitoring & Control Software,
Geometry Manager Pro (included in the ET-UK20) |
Supplied accessories |
Power cord with secure lock, wireless/wired remote control unit,
batteries (R03/AAA type x 2), software CD-ROM (Logo Transfer Software, Multi Projector Monitoring & Control Software) |
NOTE |
* Product numbers vary depending on the
market. The general guideline is as follows: The product number in the
Americas and Taiwan is
PT-DZ870KU/DZ870WU/DZ870LKU/DZ870LWU,
PT-DW830KU/DW830WU/DW830LKU/DW830LWU, and
PT-DX100KU/DX100WU/DX100LKU/DX100LWU.
The product number in Europe, CIS, Asia (except Taiwan), Oceania, Middle East, and Africa is
PT-DZ870KE/DZ870WE/DZ870LKE/DZ870LWE, PT-DW830KE/DW830WE/DW830LKE/DW830LWE, and PT-DX100KE/DX100WE/DX100LKE/DX100LWE.
*1 When the STANDBY MODE is set to ECO, network functions such as power
on over the LAN will not operate. Also, only certain commands can be
received for external control using the serial terminal.
*2 Measurement, measuring conditions, and method of notation all comply with ISO 21118 international standards.
*3 Optical axis shift cannot be operated with the ET-DLE055.
*4 +45 % from center of screen with the ET-DLE085.
*5 ±30° with the ET-DLE085/DLE055 and +5° with the ET-DLE030.
*6 ±20° (±8° with the ET-DLE085/DLE055) when using both the KEYSTONE and
CURVED corrections of the Geometric Adjustment function.
*7 When using the KEYSTONE corrections of the Geometric Adjustment function.
*8 ±15° (±8° with the ET-DLE085/DLE055) when using both the KEYSTONE and
CURVED corrections of the Geometric Adjustment function.
*9 Not operable with the ET-DLE030.
*10 Up to a total of ±55°during simultaneous horizontal and vertical correction.
*11 ±40° with the ET-DLE150/DLE250/supplied lens, ±22° with the ET-DLE085/DLE055 and +5° with the ET-DLE030.
*12 ±15° with the ET-DLE085/DLE055.
*13 With legs at shortest position.
*14 Average value. May differ depending on models.
*15 The operating temperature range is 0 °C to 40 °C (32 °F to 104 °F)
when the FAN CONTROL is set to HIGH ALTITUDE MODE (for altitudes from
1,400 m to 2,700 m (4,593 ft to 8,858 ft) above sea level). Also, if the
ambient temperature exceeds 40 °C (104 °F) (35 °C (95 °F) in HIGH
ALTITUDE MODE) when the projector is being used with LAMP SELECT set to
DUAL and LAMP POWER set to HIGH, the light output may be reduced
approximately 20 % to protect the projector. |
NOTES ON USE |
1. Do not install the projector in locations
that are subject to excessive water, humidity, steam, or oily smoke.
Doing so may result in fire, malfunction, or electric shock.
2. The projector uses a high-voltage mercury lamp that contains high
internal pressure. This lamp may break, emitting a loud sound, or fail
to illuminate, due to impact or extended use.
3. The projector uses a high-wattage lamp that becomes very hot during operation. Please observe the following precautions:
• Never place objects on top of the projector while it is in operation.
• Make sure there is an unobstructed space of 500 mm (19-11/16 in) or more around the projector's exhaust openings.
• Do not stack projector units directly on top of one another for
the purpose of multiple (stacked) projection. When stacking projector
units, be sure to provide the amount of space indicated between them.
These space requirements also apply to installation where only one
projector unit is operating at one time and the other unit is used as a
backup.
• If the projector is placed in a box or enclosure, the temperature
of the air surrounding the projector must be between 0 °C (32 °F) and 40
°C (104 °F). Also, make sure the projector's intake and exhaust
openings are not blocked. Take particular care to ensure that hot air
from the exhaust openings is not sucked into the intake.
4. If the projector is to be operated continuously 24 hours a day / 7
days a week, use the multi-lamp optical system's alternating lamp
operation function (Lamp Relay mode). The projector can be operated
continuously 24 hours a day / 7 days a week in dual-lamp operation mode.
Allow a minimum of two hours per week of non-operation time per lamp if
using the dual-lamp operation mode.
5. The lamp replacement cycle duration becomes shorter if the projector is operated repeatedly for short periods.
• The length of time that it takes for the lamp to break or fail to
illuminate varies greatly depending on individual lamp characteristics
and usage conditions.
• The brightness of the lamp will gradually decrease with use.
• The usage environment affects the lamp replacement cycle.
6. Because the ET-DLE055/DLE030 is a fixed short-throw lens, the lens shift function cannot be used with it.
7. Due to natural characteristics of lamps, screen brightness may
vary (flicker). This is not an indication of faulty lamp performance. |