LG MW-60SZ12 User manual

LCD Projection Monitor
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : RE-01JB
MODEL : MW-60SZ12
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
Sep.,2002
Printed in KoreaP/NO : 3828VD0134A

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Servicing Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrostatically Sensitive (ES) Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description of Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Correction of Screen Tilt & Keystone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing the Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Description of each Block Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Description of Micom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Exploded View Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- 2 -
Contents

Safety Precautions
- 3 -
1. Before returning an instrument to the customer, always make a safety check
of the entire instrument, including, but not limited to, the following items:
a. Be sure that no built-in protective devices are defective and/or have been
defeated during servicing. (1) Protective shields are provided on this chas-
sis to protect both the technician and the customer. Correctly replace all
missing protective shields, including any removed for servicing conve-
nience. (2) When reinstalling the chassis and/or other assemblies in the
cabinet, be sure to put back in place all protective devices, including, but
not limited to, nonmetallic control knobs, insulating fishpapers, adjustment
and compartment covers/shields, and isolation resistor/capacitor networks.
Do not operate this instrument or permit it to be operated without all
protective devices correctly installed and functioning.
b. Be sure that there are no cabinet openings through which an adult or child
might be able to insert their fingers and contact a hazardous voltage. Such
openings include, but are not limited to, (1) spacing between the picture
tube and the cabinet back, (2) excessively wide cabinet ventilation slots,
and (3) an improperly fitted and/or incorrectly secured cabinet back cover.
c. Antenna Cold Check-With the instrument AC plug removed from any AC
source, connect an electrical jumper across the two AC plug prongs. Place
the instrument AC switch in the on position. Connect one lead of an ohm-
meter to the AC plug prongs tied together and touch the other ohmmeter
lead in turn to each tuner antenna input exposed terminal screw and, if
applicable, to the coaxial connector. If the measured resistance is less than
1.0 megohm or greater than 5.2 megohm, an abnormality exists that must
be corrected before the instrument is returned to the customer. Repeat this
test with the instrument AC switch in the off position.
d. Leakage Current Hot Check-With the instrument completely reassembled,
plug the AC line cord directly into a 120 V AC outlet.
(Do not use an isolation transformer during this test.) Use a leakage current
tester or a metering system that complies with American National Standards
Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters
Laboratories (UL) 1410, (50.7). With the instrument AC switch first in the on
position and then in the off position, measure from a known earth ground
(metal waterpipe, conduit, etc.) to all exposed metal parts of the instrument
(antennas, handle bracket, metal cabinet, screwheads, metallic overlays,
control shafts, etc.), especially any exposed metal parts that offer an electri-
cal return path to the chassis. Any current measured must not exceed 0.5
milliamp. Reverse the instrument power cord plug in the outlet and repeat
the test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN
INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINAT-
ED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER.
e. X-Radiation and High Voltage Limits-Because the picture tube is the pri-
mary potential source of X-radiation in solid-state TV receivers, it is special-
ly constructed to prohibit X-radiation emissions. For continued X-radiation
protection, the replacement picture tube must be the same type as the origi-
nal. Also, because the picture tube shields and mounting hardware perform
an X-radiation protection function, they must be correctly in place.
High voltage must be measured each time servicing is done that involves
B+, horizontal deflection, or high voltage. Correct operation of the X-radia-
tion protection circuits also must be reconfirmed each time they are ser-
viced. (X-radiation protection circuits also may be called “horizontal disable”
or “hold-down.”) Read and apply the high voltage limits and, if the chassis is
so equipped, the X-radiation protection circuit specifications given on instru-
ment labels and in the Product Safety & X-radiation Warning note on the
service data chassis schematic.
High voltage is maintained within specified limits by close-tolerance safety-
related components/adjustments in the high-voltage circuit.
If high voltage exceeds specified limits, check each component specified on
the chassis schematic and take corrective action.
2. Read and comply with all caution and safety-related notes on or inside the
receiver cabinet, on the receiver chassis, or on the picture tube.
3. Design Alteration Warning- Do not alter or add to the mechanical or elec-
trical design of this TV receiver. Design alterations and additions, including,
but not limited to, circuit modifications and the addition of items such as
auxiliary audio and/or video output connections, might alter the safety char-
acteristics of this receiver and create a hazard to the user. Any design alter-
ations or additions will void the manufacturer’s warranty and will make you,
the servicer responsible for personal injury or property damage resulting
therefrom.
4. Picture Tube Implosion Protection Warning-The picture tube in this
receiver employs integral implosion protection. For continued implosion pro-
tection, replace the picture tube only with one of the same type and num-
ber. Do not remove, install, or otherwise handle the picture tube in any
manner without first putting on shatterproof goggles equipped with side
shields. People not so equipped must be kept safely away while picture
tubes are handled. Keep the picture tube away from your body. Do not han-
dle the picture tube by its neck. Some “in-line” picture tubes are equipped
with a permanently attached deflection yoke; because of potential hazard,
do not try to remove such “permanently attached” yokes from the picture
tube.
5. Hot Chassis Warning-a. Some TV receiver chassis are electrically con-
nected directly to one conductor of the AC power cord and may be safely
serviced without an isolation transformer only if the AC power plug is insert-
ed so that the chassis is connected to the ground side of the AC power
source. To confirm that the AC power plug is inserted correctly, with an AC
voltmeter measure between the chassis and a known earth ground. If a
voltage reading in excess of 1.0 V is obtained, remove and reinsert the AC
power plug in the opposite polarity and again measure the voltage potential
between the chassis and a known earth ground. b. Some TV receiver chas-
sis normally have 85 V AC (RMS) between chassis and earth ground
regardless of the AC plug polarity. These chassis can be safely serviced
only with an isolation transformer inserted in the power line between the
receiver and the AC power source, for both personnel and test equipment
protection. c. Some TV receiver chassis have a secondary ground system
in addition to the main chassis ground. This secondary ground system is
isolated from the AC power line. The two ground systems are electrically
separated by insulating material that must not be defeated or altered.
6. Observe original lead dress. Take extra care to assure correct lead dress in
the following areas: a. near sharp edges, b. near thermally hot parts- be
sure that leads and components do not touch, c. the AC supply, d. high
voltage, and e. antenna wiring. Always inspect in all areas for pinched, out-
of-place, or frayed wiring. Do not change spacing between components,
and between components and the printed circuit board. Check the AC
power cord for damage.
7. Components, parts, and/or wiring that appear to have overheated or are
otherwise damaged should be replaced with components, parts, or wiring
that meet original specifications. Additionally, determine the cause of over-
heating and/or damage and, if necessary, take corrective action to remove
any potential safety hazard.
8. PRODUCT SAFETY NOTICE
Some electrical and mechanical parts have special safety related character-
istics which are often not evident from visual inspection, nor can the protec-
tion they give necessarily be obtained by replacing them with components
rated for higher voltage, wattage, etc. Parts that have special safety charac-
teristics are identified by shading, by a *, or by on schematics and
parts lists. Use of a substitute replacement that does not have the same
safety characteristics as the recommended replacement parts might create
shock, fire, and/or other hazards. Product safety is under review continu-
ously and new instructions are issued whenever appropriate.
DEVICE
UNDER
TEST
TEST ALL
EXPOSED MET AL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
EAR TH
GROUND
LEAKAGE
CURRENT
TESTER
(READING SHOULD
NO T BE ABOVE
0.5mA)
+ -
AC Leakage Test

Servicing Precautions
- 4 -
CAUTION: Before servicing instruments covered by this service manual and
its supplements, read and follow the SAFETY PRECAUTIONS section of this
manual. Note: If unforeseen circumstances create conflict between the follow-
ing servicing precautions and any of the safety precautions, always follow the
safety precautions. Remember: Safety First.
General Servicing Precautions
1. a. Always unplug the instrument AC power cord from the AC power source
before: (1) removing or reinstalling any component, circuit board, module,
or any other instrument assembly. (2) disconnecting or reconnecting any
instrument electrical plug or other electrical connections. (3) connecting a
test substitute in parallel with an electrolytic capacitor in the instrument.
Caution: A wrong part substitution or incorrect polar-ity installation of
electrolytic capacitors may result in an explosion hazard.
b. Do not defeat any plug/socket B+ voltage interlocks with which instru-
ments covered by this service manual might be equipped.
c. Do not apply AC power to this instrument and/or any of its electrical
assemblies unless all solid-state device heat sinks are correctly installed.
d. Always connect a test instrument’s ground lead to the instrument chassis
ground before connecting the test instrument positive lead.
Always remove the test instrument ground lead last.
Note: Refer to the Safety Precautions section of this manual.
2. The service precautions are indicated or printed on the cabinet, chassis, or
components. When servicing, follow the printed or indicated service precau-
tions and service materials.
3. The components used in the unit have a specified flame resistance and
dielectric strength. When replacing any components, use components
which have the same ratings. Components identified by shading, by *, or
by in the circuit diagram are important for safety or for the characteristics
of the unit. Always replace with the exact replacement components.
4. An insulation tube or tape is sometimes used and some components are
raised above the printed wiring board for safety. The internal wiring is some-
times clamped to prevent contact with heating components. Install them as
they were.
5. After servicing, always check that the removed screws, components, and
wiring have been installed correctly and that the portion around the service
part have not been damaged. Further, check the insulation between the
blades of the attachment plug and accessible conductive parts.
INSULATION CHECKING PROCEDURE
Disconnect the attachment plug from the AC outlet and turn the power on.
Connect the insulation resistance meter (500 V) to the blades of the attach-
ment plug. The insulation resistance between each blade of the attachment
plug and accessible conductive parts (Note 1) should be more than 1 Mohm.
Note: Accessible conductive parts include metal panels, input terminals, ear-
phone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged eas-
ily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component dam-
age caused by static electricity.
1. Immediately before handling any semiconductor component
or semiconductor-equipped assembly, drain off any electrosta-
tic charge on the body by touching a known earth ground.
Alternatively, obtain and wear a commercially available dis-
charging wrist strap device, which should be removed for
potential shock reasons prior to applying power to the unit
under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or expo-
sure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some solder
removal devices not classified as “anti-static” can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install
t.(Most replacement ES devices are packaged with leads elec-
trically shorted together by conductive foam, aluminum foil, or
comparable conductive material.)
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective materi-
al to the chassis or circuit assembly into which the device will
be installed.
Caution: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replace
ment ES devices. (Otherwise, seemingly harmless motion,
such as the brushing together of your clothing or the lifting of
your foot from a carpeted floor, can generate static electricity
sufficient to damage an ES device.)

- 5 -
Description of Controls
ON/OFF
ON/OFF
SOURCE MENU VOLENTER
/
Main Body
Main Body
SOURCE Button ENTERA/ Button
ON/OFF Button
VOL F, GButton
E, DButton
Indicators
MENU Button
“ ” is the warning message on screen.
Orange Standby.
Operation Indicator
Green(flashing) Lamp cooling untill the lamp turn on.
(for 25 seconds)(Refer to P.18)
Green On operation.(Turn on the lamp)
Orange(flashing) Monitor lamp is cooling as power out(1 minutes)
Off Power off.
Monitor lamp is reaching the end of its life and needs
Red to be replaced with a new lamp.(over 10000 hours)
“Replace the Lamp”
Lamp Indicator Red(flashing) The monitor has trouble in the lamp or around it.
Contact the service center.
Green(flashing) The lamp cover is not closed.
Temperature Indicator
Red
The monitor is turned off due to its high temperature.
Contact your service center.
Red(flashing) Power has turned off due to problem with the
Green(flashing) internal cooling fans. Contact your service center.
* Temperature indicator, lamp Indicator and operation indicator at the front of the monitor show the user the
operating status of the monitor.

- 6 -
R L
YPBPR
RGBIN1 RGBIN2 RGBOUT
MOUSE
RS-232C
RS-232C
RGBIN3(DVI-I)
RGBIN3
(DVI-I)
PONENT
COM-
VIDEOS-VIDEO
DCOUT
(12V/0.5A) MIC
R L
YPBPR
RGB IN1 RGB IN2 RGB OUT
MOUSE
RS-232CRGB IN3(DVI-I)
PONENT
COM
VIDEOS-VIDEO
DC OUT
(12V/0.5A) MIC
Rear Connecting Part
Rear Connecting Part
RGB IN1
RGB IN2
RGB OUT
MOUSE
MIC
RS-232C
COMPONENT
(Y, PB, PR)
R, L
VIDEO
S-VIDEO
RGB IN3(DVI-I)
DC OUT(12V/0.5A)
*Use this jack when
connecting the
wireless receiver to
the monitor.

- 7 -
POWER
SOURCE MENU
LR
ZOOM MUTE
LASER
Remote Control
Remote Control
POWER Button
SOURCE Button
R MOUSE Button
(Zoom-in Button)
MOUSE DRAG
VOL.
STILL
ARC
AUTO
AVL
DASP
APC
MIC
MOUSE DRAG
Button
VOL. +, - Button
STILL Button
L MOUSE Button
(Zoom-out Button)
ARC Button
AVL Button
DASP Button
APC Button
MIC Button
AUTO Button
ZOOM Button
LASER Button
MENU Button
ENTERA Button POINTER Button
MUTE Button
* Switches the sound
on or off.
Button
Button Function Function
POWER Button Selects ON/OFF of power.
SOURCE Button Switches to RGB1/2/3, Video, S-Video, Component mode.
MENU Button Displays or hides the menu.
L MOUSE Button * Corresponds to the Left - Click of PC Mouse.
(Zoom-out Button) * Downsizes the screen on the zoom function.
R MOUSE Button * Corresponds to the Right - Click of PC Mouse.
(Zoom-in Button) * Enlarges the screen size on zoom function.
POINTER Button * After selecting menus, controls selecting and adjusting
functions with the direction of up, down, left, right.
* Moves the screen with the direction of up, down, left, right
on zoom function.
* Moves and releases the selected icon on PC screen.
MOUSE DRAG Button Uses to select and drag an icon in PC mode.
ENTERAButton Checks the present mode and sets the change of functions.
ZOOM Button Refer to page 34.
MUTE Button Cuts off audio.
VOL.(+, -) Button Adjusts volume level.
STILL Button
ARC Button
AUTO Button
AVL Button
DASP Button
APC Button
MIC Button
LASER Button Projects a bright red laser point on to the screen for indication
purposes.
(Don’t look at laser beam directly as it will cause eye
damage.)

- 8 -
Accessories
Accessories
POWER
SOURCE MENU
LR
ZOOM MUTE
LASER
1.5V
1.5V
Mouse Connecting Cables
Optional Extras
* Contact your dealer for buying these items.
* Contact your dealer for replacing a new lamp.
Remote Control Batteries 2 (size AA) Audio/Video Cable
Computer Cable
MAC Serial Mouse Cable
DVI cable
Lamp
S-Video Cable
PS/2 Mouse Cable
(IBM PC or Compatible)
Operating guide

1. Application Object
This instruction is for the application to the LCD projection Monitor.
2. Notes
(1) The power source insulation of this LCD Projection TV is
not charging type and you may not use the transformer for
insulation. But you better adjust the set after operating it
with insulation transformer between power supply cable
and input part of the set for protecting the adjusting equip-
ment.
(2) The adjustment must be performed under the correct
sequence.
(3) The adjustment must be performed in the circumstance of
25!5°C of temperature and 65!10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 220V, 60Hz in
adjusting.
(5) The set must be operated for 5 minuets preliminarily
before adjustment if there is no specific designation.
The preliminary operation must be performed after receiv-
ing 100% white pattern, but reception of the moving pic-
ture may also be possible in unavoidable case.
3. DRIVER Voltage Adjustment
All adjustment mode are entered by pressing the IN-START
key on the remote control, after adjustment press the ENTER
key to come out.
(1) Required Test Equipment
1) Output voltage measurement Jig : 1EA
2) PC Patteren generator : 1EA
3) A remote control for adjustment
(2) Setting of Devices
(3) Preparation for Adjustment
1) Connect the PC pattern Generator with the RE-01JB set
as Fig.1
2) Adjust the PC pattern generator to XGA60Hz.
3) Press the INPUT SELECTION key(TV/AV) to select the
RGB1 input.
4) Install the Main Board of RE-01JB to the set JIG.
(4) Sequence of Adjustment (VREF&VMID)
1) Turn the set on.
2) Use the IN-START key on the R/C for adjustment to select
'Drive LCCOM Adjust' in adjustment menu.
3) Adjust voltage of VREF and VMID for each R,G,B. ( SEE a
Table below)
4) Press the ENTER key on the R/C for adjustment to store
the adjustment value when adjustment is finished.
4. EPLD Programming
(1) Required Test Equipment
1) Byteblaster
2) PC (or Notebook): 1EA
3) EPLD Program
(2) Sequence of Adjustment
1) Connect one port of Byteblaster to the Parallel Port and
connect another port of Byteblaster to P1201 of Sound
Board.
2) Turn the SET and PC on.
3) Operate an EPLD program of PC(or Notebook).
5. Signal adjustment of LCD control
5-1. LCCOM ADJUSTMENT
(1) Required Test Equipment
1) Pattern generator which can generate each R,G,B signal
of fined horizontal bar pattern.
2) A remote control for adjustment : 1EA
(2) Sequence of Adjustment
1) Turn on the power supply of JIG for adjustment.
2) Adjust the PC pattern generator to XGA60Hz and fined
horizontal bar pattern and then connect to the SET.
3) Press the INPUT SELECTION key on the R/C to select
RGB.
4) Press IN-START key on the R/C for adjustment to enter
adjustmet mode.
5) Select LCCOM adjustment menu.
6) Use the VOLUME key to make the fewest screen FLICK-
ER with watching screen. (Adjust individually after
inputting each RGB input signal.)
7) Press the ENTER key to come out of adjustment mode
when adjustment is finished.
5-2. NRS ADJUSTMENT
(1) Required Test Equipment
1) PC Pattern generator : 1EA
2) A remote control for adjustment : 1EA
(2) Sequence of Adjustment
1) Turn the Power supply on.
2) Adjust the PC pattern generator to XGA60Hz and 16Gray
pattern and then connect the PC pattern generator to SET.
3) Press the INPUT SELECTION key on the R/C to select
RGB.
Adj.Value
The minimum value which is over 9.5V
7.0V
VREF
VMID IC1808 PIn 14
IC1808 PIn1
- 9 -
Adjustment Instructions
MONITOR PC Pattern
Generator
Board
SET JIG
RGB
Voltage
measurement
JIG
R G B
(fig. 1) Voltage adjustment Set

4) Press the IN-START key on the R/C for adjustment to
enter adjustment mode.
5) Select NRS adjustment menu.
6) Use the VOLUME key to make the fewest vertical lines on
the screen with watching screen.
7) Press the ENTER key to come out of adjustment mode
when adjustment is finished.
6. Factory Default&RGB Gain/Offset
Adjustment
(1) Required Test Equipment
1) Pattern generator : 1EA
2) A remote control for adjustment : 1EA
(2) Sequence of Adjustment
1) Adjust the pattern generator to white/black window as Fig.
Below and connect to RGB1 Input terminal of the set.
2) Select RGB1 as Input signal.
3)Press the IN-START key on the R/C for adjustment to enter
adjustment mode and select Factory Default in adjustment
mode.
4) Press the ENTER key to operate Factory Default and enter
adjustment mode again and then select AutoGain in
adjustment menu.
5) Press the ENTER key to operate AutoGain and press the
Enter key to store AutoGain when adjustment is finished.
7. Screen Position Adjustment
(1) Required Test Equipment
1) Pattern generator : 1EA
2) A remote control for adjustment : 1EA
(2) Sequence of Adjustment
1) Connect a power source with TV Set and turn TV Set on.
2) Do heat run for 5 min and over before adjustment.
3) Input the farthest outer pattern signal into pattern genera-
tor except DTV signal (Hat or Hatch pattern which has the
farthest line) and connect to RGB1 and then select Input
signal of set to RGB1.
4) Press IN-START key on the remote control to enter the
adjustment mode.
5) Select POSITION CONTROL of adjustment menu and
then select the H POSITION in SUB Menu.
6) Adjust H-Position so that the farthest line is shown and to
be symmetrical on the end of right/left screen.
7) Select the V POSITION in Menu.
8) Adjust V POSITION so that the farthest line is shown and
to be symmetrical on the end of top/bottom screen.
9) When finishing the adjustment, get out of adjustment mode
by pressing ENTER button on Remote Control.
7. White Balance &Gamma Adjustment
(1) Required Test Equipments
1) Illuminometer (name of model : CA-100) : 1EA —>
Measure color of projecting screen center
2) Pattern Generator : 1EA —> 16 step Gray Pattern, 64 step
Gray Pattern
3) A remote control for adjustment : 1EA
(2) Setting of Devices
7-1 Sequence of Gamma manually adjustment
1) Prepare the PC Pattern Generator which is possible to out-
put R/G/B of 16 step and 64 step Gray Pattern.
2) Equipment composition : Follow Fig. 3.
3) Turn on the Jig for adjustment.
4) Select the RGB 1 by pressing the input select button on
Remote Control.
5) Output the 16 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray.
If it’s not, press the IN-START button on Remote Control
and then adjust the level data of each step manually in
sub menu of Gamma RGB.
6) Output the 64 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray or whether there is Gamma
noise.
If there’s any problem, press the IN-START button on
Remote Control and then adjust the level data of each
step manually in sub menu of Gamma RGB.
7) After finishing adjustment, exit adjustment mode by using
ENTER button on Remote Control.
7-2 Sequence of Gamma Auto Adjustment
1) Display the biggest WHITE PATTERN on screen and
change the 7050 R/G/B CONTRAST ( or 16th Gamma 1
R/G/B) data value of adjustment mode so that the white
balance of illumination system or illuminometer to be
x:283, y: 297(D9300K).
2) Measure the luminance value with changed data value in
clause 1.
3) Seek the luminance of each step so that each Gamma
value of 16 step to be 2.5 curve on a basis of luminance
value measured in clause 2. ( Maximum luminance *
(n1/16)** Maximum luminance : luminance measured
in clause 2)
N 1 : Each step unit (1.2.3.4,------15) when classify the sig-
nal level to 16 step.
4) Input the Gray pattern corresponding to the first luminance
and change the first adjustment mode R/G/B data value so
that the R/G/B data value to be same white balance with
1) above and luminance with 3) above.
- 10 -
PC Pattern
Generator
MW-60SZ12

- 11 -
5) Input the Gray pattern corresponding to the second lumi-
nance and change the second adjustment mode R/G/B
data value of Gamma adjustment item so that the R/G/B
data value to be same white balance with 1) and right to
the second luminance (measured in clause 3)
6) Input pattern signal with same method above and change
the Gamma R/G/B data value of corresponding level and
make same luminance with 3) and white balance with 1).
9. Uniformity Adjustment
(1) Required Test Equipments
1) Uniformity measurement equipment
2) A Remote Control for Adjustment
3) PC Pattern Generator : 1EA
(2) Setting of Devices
(3) Sequence of Adjustment
1) Adjust the screen coordinates as shown below.
2) Output the 17th VDP Test Pattern signal(7050 MAX 640) of
No. 4 sub adjustment item maximum adjustment.
Read the white coordinates and communicate 3 line with
ET7050 IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of max point.
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
3) Output the 16th VDP Test Pattern signal(7050 MID 570) of
No. 4 sub adjustment item(middle adjustment).
Read the white coordinates and communicate 3 line with
ET7050 IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of mid point.
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
4) Output the 15th VDP Test Pattern signal(7050 MIN 360) of
No. 4 sub adjustment item(min adjustment).
Read the white coordinate and communicate with ET7050
IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of miner point.
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
5) White the miner, middle, maximum data for each point to
confront to each MICOM address.
10. Video Gain Adjustment
(1) Required Test Equipments
1) TV
2) A Remote Control for Adjustment
(2) Sequence of Adjustment
1) Press the INPUT SELECTION key on the R/C to select
VIDEO input.
2) Input the NTSC 13CH signal into Video input.
3) Set the set input to video (AV input).
4) Press the IN-START key on R/C for adjustment to select
'2101 Color Control1' in adjustment menu.
5) Raise the 2101 picture value to the maximum(63).
6) Use the 2101 subbright value and adjust upper 3 gradation
of Gray bar not to be distinguished.
7) Set the video channel to NTSC 6CH.
8) Press the IN-START key on R/C for adjustment again to
select '2101 Color Control1' in adjustment menu.
9) Raise the Driver G Gain to the maximum(63) and then
stop the Driver G Gain when the US 6CH is visible.
10) Make the Driver B value same with Driver G value and
make the Driver R value higher(2) than Driver G.
11) Press the ENTER key on R/C for adjustment to store the
adjustment value when the adjustment is finished.
PC Pattern
Generator
Adj.Jig
Camera
MW-60SZ12
Color Bar
Gray Bar
Adjust 3 gradations
not to be
distinguished.
US 6CH
Adjust the these
letters not to
be saturated.
0 1 2 3 ............xx..........15 16
1
.
yy
.
11
12

11. Component Gain Adjustment
(1) Required Test Equipments
1) Signal(DTV Signal 31-3)
2) SET-TOP box( or an equipment which can generate YPbPr
output receiving DTV signal)
3) A Remote Control for Adjustment
(2) Sequence of Adjustment
1) Press the TV/AV key on the R/C for adjustment to select
component input.
2) Input DTV signal 31-3 into component input.
3) Press the IN-START key on the R/C for adjustment to
select '2101 color control1' in menu.
4) Raise the 2101 picture value to the maximum.
5) Use the 2101 subbright value and adjust lower 2 gradation
of Gray bar not to be distinguished.
6) Press the IN-START key on R/C for adjustment again to
select '2101 color control2' in adjustment menu.
7) Use the Driver G Gain and adjust 2101 G Gain so that all
gradation(11gradation) of upper Gray bar are distin-
guished.
8) Make the Driver B value same with Driver G value and
make the Driver R value higher(2) than Driver G.
9) Press the ENTER key on R/C for adjustment to store the
adjustment value when the adjustment is finished.
12. EDID Data INput
(1) Required Test Equipments
1) A JIg for adjusting PC,DDC.(PC serial to D-sub.connection
equipment)
2) SW for writing DDC(EDID data write & read)
3) D-sub terminal
4) D-sub /DVI conversion connector
(2) Setting of Devices
(3) Preparation for Adjustment
1) Set devices as above and turn the PC,jig on.
2) Put the S/W for writing DDC(EDID datawrite&read)into
operation.(Operated in DOS mode.)
(4) Sequence of Adjustment
1) Turn the set on and set the input to RGB1 and then con-
nect D-sub to RGB1 input terminal.
2) nput the product code, production week/year, serial num-
ber (if it is not input, write "01") to the S/W for writing DDC.
3) Select '60RPM_A' out of DDC file.
4) Operate the EDID write command and check the
60RPM_A is writed well through the Read command.
5) Connect the DVI conversion connector to D-sub and
RGB3(DVI) input terminal of set.
6) Set the Input selection to RGB3.
7) Select '60RPM_D' out of DDC file.
8) Operate the EDID Write command and check the
60RPM_D is writed well through the Read command.
- 12 -
Adjust 2101 G Gain
so that all lumination
are distinguished.
Adjust subbright
so that 2 lumination
are not to be
distinguished.
PC
JIG

1. Screen Tilt and Keystone cause of occurrence
When the whole engin is leaned, Tilt occur and Keystone occur because of changing TCL
when projection angle of engine is different or Mirror angle is different.
- 13 -
Correction of Screen Tilt & Keystone
TILT KEYSTONE
TILT-Up and down operation necessity
of the whole engine Rotation and side angle operation necessity of the whole engine
KEYSTONE-TLC is
shorter than down KEYSTONE-TLC is
shorter than down
Mirror angle
Engine projection angle
Comm
-onness

2. New Mechanism for Adjustment
The axis of rotation of engine sets back and the whole engine enable left and right rotation, up and down, left and right angle
movement.
When turning adjustment Knob of left/right in front, engine will move.
When moving the engine base with left and right direction in front, engine will rotate.
- 14 -
pole
Rota
-tion
Fixing Boss
Adjustment Knob Adjustment Knob
Locking Knob
engine
engine supporter
engine base
engine base For calculation : When
projection lens 0.2cleans,
Keystone occurs 5mm.
engine base
The axis of rotation
The axis of rotation
Side angle
Left/Right
angle

3. Working Method and Improvement for Correction Mechanism of Tilt and Keystone
3.1 Working Method
(1) Put the 3t spacer on back of down parts of Mirror to correcting the Mirror angle of down parts
- To correct difference between Mirror angle of C/A and JIG angle of lighting parts.
(2) Looking at the screen, push the engine base for left/right direction in front of engine. At this time,
check the screen Keystone condition.
(3) Adjust engine angle by turning the adjustment Knob on the down part.
(4) If Tilt and Keystone is [MAX-MIN] # 4mm, lock the locking Knob of left/right in front part and then fix
the fixing boss with screw.
3.2 Improvement
When turning left and right rotation, because an engine construction structure is tuched a construction
structure of cabinet, shield case will be correction. When turning adjustment Knob, operation is bad
because you cann’t input a hand to turning or adjustment Knob is tight.
Continously consult with the production department for improving adjustment operation. (A special
Driber for adjustment and so on)
- 15 -
3t spacer
engine base
engine
Fixing Boss
Adjustment Knob Adjustment Knob

* Connect your dealer or LG service center for replacing of new lamp.
You must replace the lamp when:
¯The projector image get darker or start to be deteriorated.
¯The lamp indicator is red(red, flashing alternately).
¯The massage “LAMP REPLACE“ appears on the screen when turning the projec-
tor lamp on.
* Replace the lamp as below sequence
1. Turn off the projector and unplug the power cable.
(Cool the lamp for more than 1 hour.)
2. Remove the four retaing screws on the lamp cover with a screwdriver of “+“ type
and then lift off the lamp cover.
3. After lifting the lamp cover off, remove the two retaing screw on lamp case with
screwdriver of “-“ type. (refer to fig.2)
4. Lift up the fixed wire handle of the lamp. (refer to fig.3)
5. Pull out the handle slowly and remove the lamp case.
6. Insert the new lamp gently into the correct position. Make sure it is inserted cor-
rectly.
7. Tighten the screw you removed in step 3.
8. Replace the lamp cover and tighten the cover screws.(Make sure the almp cover
is securely fastend. If lamp cover is open, the lamp indicator flashes green and
the projector is not turn on.)
* Resetting the lamp time
After pressing the “?“ key on the remote control in Stand-By mode, press the “9876“
and press the “OK“ button.
And then three LED in the front is stop after flashing for a moment.
* Lamp Life Time Confirmation
1. Method1 : Enter ADJ mode with using the remote control. You can be confirmed
because “ Lamp Life Time XX hr“ is appeared.
2. Method2 : With using the remote control offerd to consumer if you press the
menu button continuously, OSD menus will disappear then press the “9876“ and
press the “OK“ button to enter ADJ mode you can see “Lamp Life Time XX hr“
- 16 -
Replacing the Lamp
< Fig. 1>
< Fig. 2>
< Fig. 3>

1. Power Block
Circuit is to use the FLY BACK CONVERTER way for insula-
tion basically and composed of HYBRID IC STR F6658B for
switching power, which has a POWER MOSFET within, and
STR G6153 as the circuit for stand-by. And it is operated by
the ERROR AMP (IC802, SE105) which transfers electric sig-
nal in output part to the primary part with insulating primary
and secondary part.
1.1 Block Diagram (STR F6668B)
1.2 Pin Description
1.3 Others
1.4 Function & Description of each terminals
(1) Vin terminal (4 PIN), Start circuit
The Start circuit performs the operation start and stop of con-
trol IC by voltage of Vin terminal (4 PIN).
In power start, C2 is charged through the start resistor Rs.
If the Vin terminal voltage reaches 16V (TYP), control IC
starts operating and current increases by the operation of
Start circuit. If this voltage decreases and reaches lower than
10V (TYP), the control IC stops and returns initial states by
the operation of UVLO (operation stop circuit).
The control circuit gains power by rectifying the trans wire
wound D after operation.
As the voltage of trans wire wound doesn’t go up to the set
voltage just after operation, the Vin terminal voltage begins to
decrease. But as the voltage of operation stop is set to 11V
(Max), the voltage of trans wire wound reaches the set value
and control IC keeps operating while the Vin terminal voltage
decreases to the voltage of operation stop.
The Vin Start voltage (Terminal 4) is 16V (TYP), the voltage
of operation stop is 10V (TYP) and the Vovp voltage is 22.5V
(TYP).
(2) OCP / FB terminal (Terminal 1), Oscillator
and Constant voltage control circuit
The oscillator is to use charge or discharge of internal con-
densor C1 and to select PRC (Pulse Ratio Control) which
fixes off time of MOSFET and changes on time of it.
The voltage regulator Vr4, which is generated when the FB
current through Photo Coupler flows in R4, is approved by
Vr5. Because of this, Comp. 1 reverses and needed voltage
value of Vr5 (peak value of Id) is supplied from Vr4(FB cur-
rent). Like this Output control is current mode control.
(3) OCP / FB terminal (Terminal 1) and OCP circuit
OCP circuit is the Protection circuit against over-current
which selects the pulse by pulse way. This way is to reverse
oscillator output by detecting peak value of MOSFET drain
current every pulse.
Detecting MOSFET drain current is done by connecting R5
with MOSFET source terminal (Terminal 2) and GND terminal
(Terminal 3) and by inputting regulated voltage to OCP/FB
terminal. The threshold voltage Vth (1) of OCP terminal is
about 0.73V compared with GND. External components R4
and R5 are Filter circuit to protect malfunction by surge cur-
rent which is generated in MOSFET On.
- 17 -
Description of each Block Circuits
5
START OVP
Counter
Latch
D
OCP
GND
Drive
Buffer
Amp.
OSC
Mirror
FB Current
Detector
Internal Bias
Vcc
FB
Internal Bias
Internal Bias
Reg1 (9.4V)
Reg2 (7.2V)
Reg3 (7.2V)
TSD
S
RQ
FB OCP
4
1
2
3
1
2
3
4
5
O.C.P/F.B
S
D
Vin
GND
No. Symbol Name Function
Input signal of detecting
over-current & to input
signal for controlling con-
stant voltage.
Over-current
/Feed-Back
terminal
MOSFET sourceSource
terminal
MOSFET drainDrain
terminal Input control circuit powerVoltage input
terminal
GroundGround
terminal
Symbol Function
O.V.P Internal Protect circuit against over-voltage
T.S.D Internal Protect circuit against overheat
Reg.
Internal Bias
Icc
Vcc
20VVcc(ON)Vcc(OFF) 15V
15mA(TYP)
13mA(TYP)
70µA(MAX)
Vcc
(
5pin)
Start Circuit Vin terminal voltage waveform

In light load, if output voltage decreases, the trans wire
wound voltage in primary part also decreases proportionately
and the Vin terminal voltage in primary part reaches lower
than operation stop volate so that OCP circuit stops operat-
ing. In this case, the circuit current decreases so that the Vin
terminal voltage increases in proportion to charge current by
start resistance Rs again and intermittent operation occurres
which restarts in operation start voltage.
The advantage of adding the Protection circut against over-
current is as follows. When input voltage is high, the surge
voltage becomes low by controlling MOSFET drain current
low and stress of voltage in MOSFET becomes less in start
and overload.
And stress of current in secondary Diode can be also less by
controlling output voltage regular.
(4) Latch circuit
Latch circuit is to stop power circuit operating by keeping the
output of oscillator low in operating of two circuits (OVP &
TSD) which protect Over-voltage and overheat.
Latch circuit is to protect malfunction caused by noise etc..
And this circuit starts to function when OVP and TSD oper-
ates for more than 8 seconds. In this case, delay time is set
by timer circuit in control IC.
Though Latch circuit operates, Constant voltage power (Reg)
circuit in control IC is also operating and the circuit current is
high. So the Vin terminal voltage decreases rapidly.
If the Vin terminal voltage becomes lower than operation stop
voltage 10V (TYP), circuit current becomes below 400uA and
the Vin terminal voltage begins to increase. On the contrary, if
the Vin terminal voltage reaches operation start voltage 16V
(TYP), circuit current begins to increase and the Vin terminal
voltage begins to decrease.
In other words, the Vin terminal voltage rises and falls
between 10V (TYP) and 16V (TYP).
Like this, the latch circuit protects the Vin terminal voltage
from increasing abnormally.
Releasing latch circuit is done by making the Vin terminal
voltage lower than 6.5V and generally latch circuit is restarted
after cutting AC input.
(5) Protect circuit against overheat
This circuit lets latch circuit operate when the frame tempera-
ture of Hybrid IC is above 140°C(Min).
Actual temperature is detected by control circuit element. This
is to protect MOSFET from overheat which is caused by the
system that MOSFET and control circuit element are on the
same frame.
(6) Protect circuit against over-voltage
This circuit lets latch circuit operate when the Vin terminal
voltage exceeds 22.5V (TYP) and this is used to protect the
Vin terminal in control circuit from over-voltage.
Commonly the Vin terminal is supplied with subsidiary wire
wound of Trans and this voltage is in proportion to output
voltage so that this Protect circuit against over-voltage oper-
ates in over-voltage output in secondary part when the circuit
of detecing voltage is open.
1.5 STR G6153T(ST-BY STR)
(1) Description of each terminals
Others
(2) Operation stop circuit (UVLO)
This begins operation control if voltage is supplied to low sub-
sidiary current terminal (Vcc) 5PIN.
If the supplied voltage in the same terminal reaches operation
start current voltage (Vcc), 17.5V (TYP), current is supplied to
circuits within IC and then the operation stop circuit (UVLO)
begins operaiton control and high impedence is sustained
until the supplied voltage reaches the same voltage. In this
time, the supplied current is circuit current (Icc) in not operat-
ing and it is 70Ua (Max).
If the operation stop circuit begins operation control, circuit
current (Icc) in operation, about 15mA flows in the same ter-
minal. In controlling operation, if the supplied voltage in this
terminal goes below operation stop current voltage (Vcc),
11.5V (TYP), IC stops functioning.
Like this, this terminal plays a roll to detect supplied voltage
and to control operation start in low voltage input.
(3) Internal Oscillator (OSC)
Condernsor to determine oscillation frequency : Ct
If IC begins operating, Ct is charged from internal power by
constant current I1. At this moment, both SW1 and SW2
become open.
If electric potential of charge reaches about 4V, comparator
reverses, and SW1 and SW2 are on simultaneously.
If setting the state that I1 is lower than I2, SW1 becomes on,
Ct gets discharged and Vt decreases.
Oscillation is made by these operations.
Maximum Duty cycle of oscillator is set to 80% (TYP) and fre-
quency is set to 100KHz (TYP). Globular shaped wave output
of Comparator is used as timing clock in internal circuit and
triangle shaped wave output is used as standard signal for
transforming pulse width which will be mentioned later.
- 18 -
1
2
3
4
5
D
OCP
GND
FB
Vcc
No. Symbol Name Function
MOSFET drainDrain
terminal
Input signal of detecting
over-current in primary
part
Over-current
terminal
Ground
Ground
terminal
Input signal of controlling
constant voltage
Feed-Back
terminal
Input control circuit power
Power
terminal
Symbol Function
OVP Protect circuit against over-voltage
OLP Protect circuit against overload
TSD Protect circuit against overheat
SS Soft start function

(4) Control mode (PWM Latch / Feed Back)
Control mode of IC uses MIX Mode which is switched to the
voltage control mode in lightload and and current control
mode in heavyload linearly according to load.
MIX control mode operates PWM control comparing standard
triangle shaped wave with current waveform piled up on DC
FB voltage. So input voltage difference of PWM Comparator
in waveform cross becomes bigger and as a result, stable
PWM signal is gained.
In MIX control mode, enough noise margin can be obtained
with changing voltage PWM of standard triangle shaped
wave. Also,even in continuation inductor mode in which On
Duty is over 50%, Sub-harmonic phenomenon is suppressed
and every essential part of internal oscillator becomes opti-
mum.
(5) Protect circuit, Protect circuit against over-voltage,
Protect circuit against overheat (OLP/OVP/TSD)
1) Protect circuit against overload
This IC has protect circuit against over-current which
detects over-current every pulse.
In over-current, FB system cuts Photo Coupler for FB off
because output voltage doesn’t reach set voltage.
If detecting “Over-current Detector” signal and the “FB
Current Mirror Detector” signal, internal timer count starts
operating 655ms later after detection.
Just after overflow, the “Count Out” signal is output and at
the same time previous operation is stopped. In this state,
main switch is fixed to off and latch circuit starts operating.
Also, in latch operation, latch circuit needs 400uA (Max)
for maintenance and this current is influenced by the elec-
tric potential of Vcc terminal.
If the supplied voltage in Vcc terminal goes below power
voltage for releasing latch circuit, 8.7V (TYP), latch opera-
tion can be released. When this latch operation is
released, this IC begins start operation from Soft Start.
2) Protect circuit against over-voltage
If the supplied voltage in subsidiary power terminal (Vcc)
of this IC exceedes 22.2V (TYP), oscillation operation is
stopped by the protect circuit against over-voltage, and in
this state, main switch is fixed to off and latch operation
begins.
* power voltage Vcc(ovp) for OVP operation = 22.2V (TYP)
3) Protect circuit against overheat
When the temperature of internal chip reaches 150°C
(TYP), oscillation operation stops. In this state, main
switch is fixed to off and latch operation begins.
(6) Soft Start, Protect circuit against over-current
1) Protect circuit against over-current
In main switch’s on, drain current is monitored. If drain cur-
rent over standard value is detected, main switch is
switched to off immediately. This drain current detection is
performed every time main switch is on. The standard volt-
age in OCP terminal is 0.75V (TYP).
2) Soft Start function
Aa this IC has Soft Start function which is Timer way,
external condensor for Soft Start is unnecessary.
Soft Start function is performed by increasing standard
voltage for detecting over-current step by step and by con-
trolling current in main switch.
There are 4 steps and voltage level and continuant time of
each steps are fixed inside. Table SS(1) ~ SS(4) shows
this.
- 19 -
Symbol
Vss(1)
Vss(2)
Vss(3)
Vss(4)
MIN
0.16
0.35
0.51
0.63
TYP
- -
- -
- -
- -
MAX
0.35
0.54
0.68
0.75

2 MSP3410G : Sound Block
(1) Introduction
The MSP 3410G family of single-chip Multistandard Sound
Processors covers the sound processing of all analog TV-
Standards worldwide. The full TV sound processing, starting
with analog sound IF signal-in, down to pro-cessed analog
AF-out, is performed on a single chip.
Figure shows a simplified functional block diagram of the
MSP 3410G.
Surround sound can be reproduced to a certain extent with
two loudspeakers.
These TV sound processing ICs include versions for process-
ing the multichannel television sound (MTS) signal conform-
ing to the standard recommended by the Broadcast
Television Systems Committee (BTSC).
The DBX noise reduction, or alternatively, MICRONAS Noise
Reduction (MNR) is performed alignment free.
The MSP 3410G has built-in automatic functions: The IC is
able to detect the actual sound standard automat-ically
(Automatic Standard Detection). Furthermore, pilot levels and
identification signals can be evaluated internally with subse-
quent switching between mono/stereo/bilingual; no I2C inter-
action is necessary (Auto-matic Sound Selection).
(Fig Simplified functional block diagram of the MSP 3410G)
(2) Features
• Automatic Standard Detection of terrestrial TV standards
• All NICAM standards
• All Analog FM-Srereo A2 standards
• Simultaneous demodulation of high-deviation FM-Mono and
NICAM (China)
• Very high-deviation FM-Mono mode(China,Eutelast,etc.)
• FM demodulation of all analog satellite standards.
• ADAPTIVE deemphasis for satellite(According to ASTRA
specification)
• ASTRA Digital Radio(ADR) together with DRP3510A.
(3) Sound IF Processing
1) Analog Sound IF Input
The input pins ANA_IN1+, ANA_IN2+, and ANA_IN-offer
the possibility to connect two different sound IF(SIF)
sources to the MSP 3440G. The analog-to-digital conver-
sion of the preselected sound IF signal is done by an A/D-
converter. An analog automatic gain circuit(AGC) allows a
wide range of input levels. The high-pass filters formed by
the coupling capacitors at pins ANA_IN1+ and ANA_IN2+.
2) Demodulator: Standards and Features
The MSP 3440G is able to demodulate all TV-sound stan-
dards worldwide including the digital NICAM system.
Very high deviation FM-Mono: Detection and robust
demodulation of one FM carrier with a maximum devi-ation
of 540 kHz.
- 20 -