LG RD-JT41 User Manual

LG RD-JT40/41 Service Manual

RD-JT40/RD-JT41

SERVICE MANUAL

Caution

Be sure to read this manual before servicing. To assure safety from fire, electric shock, injury, harmful radiation and materials, various measures are provided in this Acer DLP projector. Be sure to read cautionary items described in the manual to maintain safety before servicing.

Service Warning

1. When replace the lamp, to avoid burns to yor fingers. The lamp becomes too hot.

2. Nevr touch the lamp bulbwith a finger or anything else. Never drop it or give it a shock. They may cause bursting of the bulb.

3. This projector is provided with a high voltage circuit for the lamp. Do not touch the electric parts of powrer unit (main), when turn on the pojector.

4. Do not touch the exhaust fan, during operation.

Contents

1. Specifications............................................................................................................................................2

2. Spare Parts List .......................................................................................................................................4

3. Shipping Cntents......................................................................................................................................5

4. Projector Dsription....................................................................................................................................6

5. Rmote Control Desription.........................................................................................................................9

6. Insallation................................................................................................................................................11

7. Operation................................................................................................................................................13

8. Shutdown................................................................................................................................................21

9. Maintenance...........................................................................................................................................22

10. Lamp Replacement..............................................................................................................................23

11. Trouble Shooting..................................................................................................................................25

12. Timing Char..........................................................................................................................................33

13. DMD Image Secification.......................................................................................................................34

14. Electrical nterface Caracter..................................................................................................................37

15. Final Assembly Alignent Procedure......................................................................................................39

16. Pakng Description................................................................................................................................44

17. Appearance Description.......................................................................................................................45

18. Dimension ............................................................................................................................................47

19. Schematics ..........................................................................................................................................48

20. Assy Drawing .......................................................................................................................................85

LG RD-JT40/41 Service Manual

1. SPECIFICATIONS

Projector Specifications

Technical Specifications

Note: All specifications are subject to change without notice.

General

Product name Personal Projector

Model name RD-JT40 1024*768XGA

RD-JT41 800*600SVGA

Optical

Display system 1-CHIP DMD

Lens F/Number F/2.6

Lamp 210W NSH lamp

Electrical

Power supply AC100 ~ 240V, 3.5A, 50/60 Hz (Automatic)

Power consumption 330 W (Max)

Mechanical

Dimensions 308mm/12in (W) x 95mm/3.7in (H) x 238mm/9.4in (D)

Operating temperature range

10 C ~ 40 C

Weight 6.9 lbs (3.1 Kg)

Input terminal

Computer input

RGB input D-sub 15-pin (female)

Video signal input

S-VIDEO Mini DIN 4-pin port x1

VIDEO RCA jack x1

HDTV signal input YPBPR RCA jack x3

Audio signal input

Audio 1 Mini jack stero port

Audio 2 RCA jack L, R x2

Output

USB mouse connector A/B series x1

Speaker 2 watt x 1

Control

RS-232C 9-pin x1

LG RD-JT40/41 Service Manual

Service Information

Accessories (included in the Standard Package)

Description of parts Part No.

Power cord (EU)

Power cord (US)

27.82718.281

27.01818.000

Power cord (UK) 27.01018.000

VGA signal cable 50.J0508.502

Video cable 50.73213.501

S-Video cable 50.72920.011

PC audio cable 50.74405.501

Soft carrying case 98.J3402.001

HDTV cable 50.J2401.001

USB mouse cable 50.73213.501

Remote control

98.J3401.001

3-2 converter 22.91007.011

Optional Accessories (not included in the Standard Package)

Description of parts Part No.

Mac adapter (switchable) 20.20118.A15

Spare lamp module 60.J3416.CB1

LG RD-JT40/41 Service Manual

2. Spare Parts List

Item No:99.J3477.L11Projector LGRD-JT40 spare parts list

Parts No Description

55.J3405.001 PCBA FAN CONTROL/B DX660

55.J3408.001 PCBA DC-DC/B DX660

60.J3419.001 ASSY PFC MODULE DX660

55.J3407.001 PCBA PFC CONTROL/B DX660

60.J3477.L11 ASSY ENGINE DX660-L11

55.J3419.001 PCBA THERMAL/B DX660

60.J3403.021 ASSY LOWER CASE P838 DX660/LG

42.J3415.001 FOOT REAR SILICON BLA. DX660

65.J3406.001 ADJUST FOOT FRONT MARS

55.J3401.001 PCBA DMD/B DX660

55.J3402.031 PCBA MAIN/BD LG DX660

60.J3414.031 ASSY OPTICAL ENG. DX660/LG

55.J3404.001 PCBA CHIP/B DX660

60.J3415.021 ASSY HSG DMD DX660/LG

71.01076.001 IC DIGITA IMAG DMD1076-7LGA11

60.J3404.001 ASSY BALLAST MODULE DX660

60.J3405.002 ASSY REAR FAN HLD MODULE DX66

60.J3407.021 ASSY REAR CVR MODULE DX660/LG

60.J3409.001 ASSY CAP LENS TRANS. DX660

60.J3412.061 ASSY UPPER CASE P896 DX660/LG

55.J3403.001 PCBA KEYPAD BD DX660

60.J3416.001 ASSY LAMP MODULE U DX660

60.J3482.001 ASSY REMOTE+CABLE LG DXS660

27.01018.000 CORD H05VV-F 13A250V 1830MM U

27.01818.000 CORD SVT#18*3C 10A125V 1830US

27.82718.281 CORD H05VV-F 10A250V EUR BLK

50.73213.501 CABLE 4P USB A-B 1800MM BLACK

50.J0508.502 SIGNAL/C 15/15P 2500MM/BLK

50.J7111.501 CABLE A/V (G.B.R)1800 BLK 784

50.72918.001 CABLE A/V RCA(R,W,Y)1500MM

50.72920.011 C.A MIN-DIN 4P S-VIDEO W/S 15

50.74405.501 CABLE AUD PC99PT284C/PT577C B

98.J3403.001 REMOTE CONTROLLER DXS660 LG

98.J3404.001 SOFT CASE DXS660 LG

Item No:99.J3877.L11Projector LGRD-JT41 spare parts list

LG RD-JT40/41 Service Manual

Parts No Description

55.J3405.001 PCBA FAN CONTROL/B DX660

55.J3408.001 PCBA DC-DC/B DX660

60.J3419.001 ASSY PFC MODULE DX660

55.J3407.001 PCBA PFC CONTROL/B DX660

60.J3877.L11 ASSY ENGINE DS660-L11

55.J3419.001 PCBA THERMAL/B DX660

60.J3403.021 ASSY LOWER CASE P838 DX660/LG

42.J3415.001 FOOT REAR SILICON BLA. DX660

65.J3406.001 ADJUST FOOT FRONT MARS

60.J3406.061 ASSY INTERFACE MODULE DS660/L

55.J3801.001 PCBA DMD/BD FOR DS660

55.J3804.M21PCBA MAIN/BD FOR LG DS660

60.J3410.001 ASSY BOX LAMP DX660

60.J3411.001 ASSY BKT BLOWER DX660

60.J3414.041 ASSY OPTICAL ENG. DS660/LG

55.J3802.001 PCBA DMD CHIP/BD FOR DS660

60.J3415.021 ASSY HSG DMD DX660/LG

71.08460.000 IC DIGITAL IMAG DMD8460 LGA11

60.J3404.001 ASSY BALLAST MODULE DX660

60.J3405.002 ASSY REAR FAN HLD MODULE DX660

60.J3407.021 ASSY REAR CVR MODULE DX660/LG

60.J3409.001 ASSY CAP LENS TRANS. DX660

60.J3412.071 ASSY UPPER CASE P896 DS660/LG

55.J3403.001 PCBA KEYPAD BD DX660

60.J3413.071 ASSY SUB U/C P896 DS660/LG

60.J3416.001 ASSY LAMP MODULE U DX660

60.J3417.021 ASSY DOOR LAMP P838 DX660/LG

60.J3481.001 ASSY MANU+WARRANTY LG

60.J3482.001 ASSY REMOTE+CABLE LG DXS660

98.J3403.001 REMOTE CONTROLLER DXS660 LG

98.J3404.001 SOFT CASE DXS660 LG

3. Shipping Contents

The Projector is shipped with the cables required for connection to standard PC or laptop

computers. Carefully unpack and verify that you have all the items shown below. If any of

these items are missing, please contact personnel at the place of purchase.

LG RD-JT40/41 Service Manual

Optional Accessories

1. Macintosh adapter

2. 210W Lamp module

4. Projector Description

Projector

LG RD-JT40/41 Service Manual

External Control Panel

LG RD-JT40/41 Service Manual

Adjuster

LG RD-JT40/41 Service Manual

The projector is equipped with 2 quick-release adjuster feet. Push the buttons to adjust its tilt

angle.

1. Lift the projector up and press the adjuster button to release the adjuster.

2. The adjuster will drop into position and be locked.

Projector Features

The projector integrates high-performance optical engine projection and a user-friendly design

to deliver high reliability and ease of use. The projector offers the following features:

Small and light for portability

Full-function remote control with laser pointer/ remote mouse function

Hight quality manual zoom lens

One-key auto-adjustment to display the best picture quality

Easy digital keystone correction through hot keys to correct distorted images

Adjustable color balance control for data/video display

Ultra-high brightness projection lamp

Ability to display 16.7 million colors

On-screen menus in 8 languages: English, French, German, Italian, Spanish, Korean,

Simplified Chinese, and Traditional Chinese.

Switchable Normal/ Video mode for data/ video display

Powerful AV function to provide high quality AV picture

HDTV compatibility (YPBPR)

Note: The brightness of the projected image will vary depending on the

ambient lighting conditions and contrast/brightness settings.

5. Remote Control Description

LG RD-JT40/41 Service Manual

The remote control sensors are located in the front/ back of the projector. The distance

between the sensor and the remote control should not exceed 6 meters.

Installing or Replacing Batteries

LG RD-JT40/41 Service Manual

Caution

Avoid excessive heat and humidity. There may be danger of an explosion if batteries are incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer!s instructions.

LG RD-JT40/41 Service Manual

6. INSTALLATION

Screen Size

Place the projector at the required distance from the screen according to the desired picture size

(see the table below).

Diagonal

(cm/in)

Screen Size (Max.) Screen Size (Min.)

A. Width

(cm/in)

C. Height

(cm/in)

L. Projection

distance (cm/in)

Diagonal

(cm/in)

B. Width

(cm/in)

D. Height

(cm/in)

77/30.4 61.8/24 46.3/18 100/39 63/24.9 50.7/20 38.0/15

154/60.8 123.65/49 92.7/36 200/79 127/49.9 101.3/40 76.0/30

232/91.2 185.3/73 138.9/55 300/118 190/74.7 151.9/60 113.9/45

309/121.5 247.0/97 185.2/73 400/157 253/99.7 202.5/80 151.9/60

386/151.9 308.7/122 231.6/91 500/197 316/124.6 253.2/100 189.9/75

463/182.3 370.5/146 277.9/109 600/236 380/149.5 303.8/120 227.9/90

541/213.1 432.2/170 324.18/128 700/276 443/174.6 354.4/140 266.2/105

617/243.1 494.0/194 370.5/146 800/315 506/199.4 405.1/160 303.8/120

695/273.5 555.7/219 416.7/164 900/354 570/224.3 455.7/180 341.8/135

772/303.9 617.5/243 463.11/182 1000/394 633/249.2 506.3/200 379.8/150

Connecting to Various Equipment

HDTV description

The projector is capable of displaying various High Definition TV display modes. Some of

these sources are:

Digital-VHS (D-VHS) player DVD player

Satellite Dish HDTV receiver DTV tuners

Most of these sources will provide an analog component video output, a standard VGA

output, or a YPBPR (default) format.

The projector is capable of accepting HDTV data through a YPBPR connector. Use a

HDTV cable that came with your projector to display HDTV images.

The following standards are supported in the HDTV function:

480i 480p

720p 1080i

Please refer to "Menu System" on page 13 for information on the HDTV OSD selections.

LG RD-JT40/41 Service Manual

Connecting to Various Equipment

It only takes a few seconds to connect your projector to your desktop or notebook computer, VCR,

or other systems. However, a Mac adapter (an optional accessory) is needed for connection to

Macintosh computers.

LG RD-JT40/41 Service Manual

7. OPERATION

Start Up

1. Plug the power cord into a wall socket.

2. Turn on the main power switch.

3. Press POWER to start the unit. The back-lit POWER key flashes green and stays green

when the power is turned on

(When the power is turned off, there is a 60-second cooling period before the projector can be

re-started.)

4. Switch on all connected equipment.

LG RD-JT40/41 Service Manual

Digital Keystone Correction

Keystoning refers to the situation where the projected image is noticeably wider at either the

top or bottom. To correct this, press KEYSTONE +/- (hot key) on the control panel of the

projector or on the remote control, and then adjust the sliding bar labeled Keystone, as

needed. Press + to correct keystoning at the top of the image. Press - to correct keystoning

at the bottom of the image.

Auto Adjustment

In some cases, you may need to optimize the picture quality. To do this, press the AUTO key

on the control panel of the projector or on the remote control. Within 3 seconds, the built-in

Intelligent Auto Adjustment function will re-adjust settings to provide the best picture quality.

LG RD-JT40/41 Service Manual

Source Selection

When several input sources are available, press the SOURCE key to make a selection from the

control panel of the projector or the remote control.

Menu System

Press Menu for the main menu, and then press or to select a sub-menu. Press Menu

again to select items in the sub-menu.

LG RD-JT40/41 Service Manual

1. Display Menu

LG RD-JT40/41 Service Manual

2. Image Menu

LG RD-JT40/41 Service Manual

3. Source Menu

LG RD-JT40/41 Service Manual

4. Control Menu

FUNCTION DESCRIPTION

Language sets the language for the OSD control menus.

Language

Use the 3 / 4 key to select the desired language from among English, French, German, Italian, Spanish, Korean, Simplified Chinese and Traditional Chinese.

OSD Pos.

Selects a desired OSD position.

OSD

OSD Time

Sets the length of time the OSD will remain active after the last time you pressed the button. The range is from 5 to 60 seconds in 5-second increments.

Source scan

When selected, activates the Source scan function.

Keystone hold

When selected, preserves the last keystone correction value even when the projector is restarted.

Setup

Default

Video Mode

Lamp hour

Mirror hold

When selected, preserves the last mirror correction value even when the projector is restarted.

Blank time

Determines the length of time before the projector is shut off when Blank is activated.

Auto off

Sets the length of time before the system is shut off when no input is detected.

User logo

Enables the user to define the logo screen that will display during start-up. Three modes are available: Default (BOXLIGHT logo), black screen and blue screen.

Returns all settings to their factory preset values.

Selects video mode.

Shows lamp usage time.

LG RD-JT40/41 Service Manual

5. PIP Menu

These functions are available only when the input mode is PC and the PIP source is Video or

S-Video

LG RD-JT40/41 Service Manual

8. Shutdown

1. Press POWER and a warning message will appear. To turn off the projector, press

POWER again.

2. The fan will continue to run for approximately two minutes.

3. Turn off the main power switch.

4. Disconnect the power cord from the wall socket.

Caution

Please do not unplug the power cord before POWER is shut down or during the two-minute cooling

process. If the projector is not properly shut down, to protect the lamp, the system will detect this and

cool the lamp for two minutes automatically before turning on again.

LG RD-JT40/41 Service Manual

9. MAINTENANCE

Lamp Information

Use and Replacement of the Lamp

When the lamp Indicator lights up red or a message appears suggesting the time of

lamp replacement, please install a new lamp or consult your dealer. An old lamp

could cause a malfunction in the projector and in rare instances may even explode.

Lamp LED Indicators

Lamp Life Indicators When the LED lights up red, it is warning you

The Lamp is not properly attached The temperature is too high When the projector!s internal temperature is too

that lamp usage has exceeded 1500 hours. Replace the projection lamp with a new one immediately. LED lights up red.

high for the projector to operate safely, the LED blinks orange and the lamp turns off automatically. The LED keeps blinking while the unit is off. If the LED light is off, the operation and temperature of the projector!s lamp are normal.

Caution

The LAMP indicator will light up if the lamp becomes too hot. Turn off the power and let the

projector cool for 45 minutes. If the LAMP indicator is still red when turning the power on, please

contact your dealer.

LG RD-JT40/41 Service Manual

10. Lamp Replacement

Caution

To reduce the risk of electrical shock, always turn off the projector and disconnect the power cord before

changing the lamp

LG RD-JT40/41 Service Manual

Caution

To reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before replacing

the lamp.

The reduce the risk of injuries to fingers and damage to internal components, use caution when

removing lamp glass that has shattered into sharp pieces.

To reduce the risk of injuries to fingers and/or compromising image quality by touching the lens, do not

touch the empty lamp compartment when the lamp is removed.

This lamp contains mercury. Consult your local hazardous waste regulations to dispose of this lamp in

a proper manner.

Resetting Lamp Hours

If you replace the lamp after 1500hours of operation, please follow the instructions

below within 10 minutes of powering on.

Temp Information

When the LED lights up, it is warning you of the following possible problems:

1. The internal temperature is too high.

2. The fans are not working.

Turn off the projector and contact qualified service personnel for further help.

LG RD-JT40/41 Service Manual

11. TROUBLE SHOOTING

Common Problems & Solutions

PROBLEMS TRY THESE SOLUTIONS NO POWER

NO PICTURE

TRAPEZOID IMAGE ON THE SCREEN

POOR COLOR

BLURRED IMAGE Press Auto on the control panel of the projector or the

REMOTE CONTROL DOES NOT WORK

Make sure the power cord is inserted snuged into the AC adapter socket. Make sure the power cord is inserted snuged into the power outlet. Toggle the power switch to the position "I# Wait two minutes after the projector is turned off before turning the projector back on.

Check for the proper input source. Ensure all cables are connected properly. Adjust the brightness and contrast. Remove the lens cap. Reposition the unit to improve its angle on the screen. Use the Keystone correction key on the control panel of the projector or the remote control unit. Select the correct video system. Adjust brightness, contrast, or saturation.

remote control unit to get better picture quality. Adjust the focus. Reposition the unit to improve its projection angle. Ensure the distance between the unit and screen is within the adjustment range of the lens. Replace the batteries with new ones. Make sure there is no obstacle between the remote control and the projector. Stand within 4 meters (13 feet) of the projector. Make sure nothing is blocking the front and rear receivers.

Status Messages

On-Screen Messages Description SEARCHING Projector is searching for input. ACQUIRING SIGNAL

OUT OF RANGE Input signal frequency exceeds the projector!s range. LAMP WARNING CHANGE LAMP AND RESET LAMP TIMER! OUT OF LAMP USAGE TIME. CHANGE THE LAMP! OUT OF LAMP USAGE TIME. YOU HAVE TO CHANGE THE LAMP!

Projector has identified the input signal and is running the auto image adjustment function.

The lamp has been in operation for 1400 hours. Install a new lamp for optimal performance.

The lamp has been in operation for 1480 hours, and the power will turn off after 20 hours.

The lamp has been in operation for over 1500 hours. The warning message will display for 30 seconds every 5 minutes after you turn on the projector and the power will turn off automatically after 10 minutes.

LG RD-JT40/41 Service Manual

1. Final Assembly Trouble Shooting Guide

System Trouble Shooting Flow Char

STEP:

Back-LIGHT OK?

1.Check power core

2.Check power board and wire

Yes

Power ON OK?

(LAMP ON?)

Yes

No Signal?

Auto Power Off?

Video NG? Yes

Yes

1.Check lamp door.

2.Check thermal switch and wire

3.Check 12V Fan and wire

4.Check power board and wire

5.Check color wheel FPC

6.Check screws on color wheel

7.Check color wheel motor

8.Check DMD driver board and 120 pins connector

9.Check Translation board and wire and 50 pins connector

10.Check Main board

11.Check AV Box connector (if with this option)

1.Check input cable

2.Check OSD source set up

1.Check OSD lamp hours

2.Check OSD Auto Off setup value

3.Check lamp door

4.Check 12V fan

5.Check thermal status

6.Check AV Box connector(if with this option)

1.Check AV Box

2.Check Video cable

Audio NG?

IR Remote Control

NG?

Pixel Fail?

Image NG? (Raindrops)

Yes

1.Check AV Box

2.Check audio cable

1.Check Remote module battery

2.Check Remote module

3.Check Translation board

4.Check Main board

1.Check DMD chip

2.Check DMD board

1.Check color wheel and Sensor board

2.Check DMD chip and holder

3.Check DMD conductive elastomers assembling

4.Clean DMD conductive elastomers

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