LG Flatron L245WP User manual

COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : LM62D
MODEL: L245WP(L245WP-BNQ.A**BQF)
( ) **Same model for Service

- 2 -
CONTENTS
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
TIMING CHART ....................................................... 8
DISASSEMBLY ....................................................... 9
BLOCK DIAGRAM ................................................. 10
ADJUSTMENT ...................................................... 13
TROUBLESHOOTING GUIDE .............................. 15
WIRING DIAGRAM ............................................... 21
EXPLODED VIEW...................................................22
REPLACEMENT PARTS LIST ...............................24
SCHEMATIC DIAGRAM......................................... 31
1. LCD CHARACTERISTICS
Type : TFT Color LCD Module Premium MVA
Active Display Area : 24 inch diagonal
Pixel Pitch : 0.270 (H) x 0.270 (V)
Size : 459.4(H) x 296.4(V) x 21.6(D)
Color Depth : 16.7M colors / 8bit
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : 6 U-type CCFL
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio ≥10
Left : +75° min., +89°(Typ) Right : -75° min., -89°(Typ)
Top : +75° min., +89°(Typ) Bottom : -75° min., -89°(Typ)
2-2. Luminance : 75%(min), 80%(Typ)
2-3. Contrast Ratio : 700(min), 1000(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate Sync, SOG, Digital
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.7 V
3) Input Impedance : 75 Ω
3-3. Operating Frequency
Horizontal : 30 ~ 83kHz
Vertical : 56 ~ 75Hz
Dot clock 165MHz
4. MAX. RESOLUTION
Analog : 1920 x 1200@60Hz
Digital : 1920 x 1200@60Hz
5. POWER SUPPLY
5-1. Power Adaptor(Built-in Power)
Input : AC 100-240V~, 50/60Hz, 1.2A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature : 10°C~35°C (50°F~95°F)
6-2. Relative Humidity : 10%~80% (Non-condensing)
6-3. MTBF : 50,000 HRS with 90%
Confidence level
Lamp Life : 40,000 Hours (Min)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 560 mm (22.05'')
Depth : 270.2 mm (10.64'')
Height : 444.5 mm (17.50'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 9.6 kg (21.17 lbs)
Gross Weight : 12.0 kg (26.46 lbs)
SPECIFICATIONS
MODE
POWER ON (NORMAL)
STAND BY
SUSPEND
DPMS OFF
POWER S/W OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
-
POWER CONSUMPTION
less than 90 W(max)
less than 85 W(typ)
less than 3 W
less than 3 W
less than 3 W
less than 2 W
LED COLOR
BLUE
AMBER
AMBER
AMBER
OFF
VIDEO
ACTIVE
OFF
OFF
OFF
-

- 3 -
Signal Connector Pin Assignment
Pin Signal (DVI-D)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T. M. D. S. Data2-
T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4-
T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1-
T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3-
T. M. D. S. Data3+
+5V Power
Ground
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal (DVI-D)
18
9
17 24
16
16
17
18
19
20
21
22
23
24
Hot Plug Detect
T. M. D. S. Data0-
T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5-
T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock-
T. M. D. S. (Transition Minimized Differential Signaling)
• DVI-D Connector (Digital)

- 4 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
•There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
•Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
•Must mount the module using mounting holes arranged
in four corners.
•Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
•Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
•Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
•Make certain that treatment person’s body are
grounded through wrist band.
•Do not leave the module in high temperature and in
areas of high humidity for a long time.
•The module not be exposed to the direct sunlight.
•Avoid contact with water as it may a short circuit within
the module.
•If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
•If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
•Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
Leakage Current Hot Check Circuit
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter

- 5 -
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this
service manual and its supplements and addenda, read
and follow the SAFETY PRECAUTIONS on page 3 of this
publication.
NOTE: If unforeseen circumstances create conflict
between the following servicing precautions and any of the
safety precautions on page 3 of this publication, always
follow the safety precautions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC
power source before;
a. Removing or reinstalling any component, circuit
board module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical
plug or other electrical connection.
c. Connecting a test substitute in parallel with an
electrolytic capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may
result in an explosion hazard.
d. Discharging the picture tube anode.
2. Test high voltage only by measuring it with an
appropriate high voltage meter or other voltage
measuring device (DVM, FETVOM, etc) equipped with
a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Discharge the picture tube anode only by (a) first
connecting one end of an insulated clip lead to the
degaussing or kine aquadag grounding system shield
at the point where the picture tube socket ground lead
is connected, and then (b) touch the other end of the
insulated clip lead to the picture tube anode button,
using an insulating handle to avoid personal contact
with high voltage.
4. Do not spray chemicals on or near this receiver or any
of its assemblies.
5. Unless specified otherwise in this service manual,
clean electrical contacts only by applying the following
mixture to the contacts with a pipe cleaner, cotton-
tipped stick or comparable non-abrasive applicator;
10% (by volume) Acetone and 90% (by volume)
isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual,
lubrication of contacts in not required.
6. Do not defeat any plug/socket B+ voltage interlocks
with which receivers covered by this service manual
might be equipped.
7. 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.
8. Always connect the test receiver ground lead to the
receiver chassis ground before connecting the test
receiver positive lead.
Always remove the test receiver ground lead last.
9. Use with this receiver only the test fixtures specified in
this service manual.
CAUTION: Do not connect the test fixture ground strap
to any heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be
damaged easily 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 damage caused by static by static electricity.
1. Immediately before handling any semiconductor
component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a
known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device,
which should be removed to prevent 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 exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static type 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 charges 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 it. (Most replacement ES devices are
packaged with leads electrically 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 material 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
replacement ES devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or
the lifting of your foot from a carpeted floor can
generate static electricity sufficient to damage an ES
device.)

- 6 -
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and
appropriate tip size and shape that will maintain tip
temperature within the range or 500 F to 600 F.
2. Use an appropriate gauge of RMA resin-core solder
composed of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a
mall wire-bristle (0.5 inch, or 1.25cm) brush with a
metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal
temperature.
(500 F to 600 F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static,
suction-type solder removal device or with solder
braid.
CAUTION: Work quickly to avoid overheating the
circuitboard printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal
temperature (500 F to 600 F)
b. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of
the component lead and the printed circuit foil, and
hold it there only until the solder flows onto and
around both the component lead and the foil.
CAUTION: Work quickly to avoid overheating the
circuit board printed foil.
d. Closely inspect the solder area and remove any
excess or splashed solder with a small wire-bristle
brush.
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong)
through which the IC leads are inserted and then bent flat
against the circuit foil. When holes are the slotted type,
the following technique should be used to remove and
replace the IC. When working with boards using the
familiar round hole, use the standard technique as
outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation
by gently prying up on the lead with the soldering iron
tip as the solder melts.
2. Draw away the melted solder with an anti-static
suction-type solder removal device (or with solder
braid) before removing the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad
and solder it.
3. Clean the soldered areas with a small wire-bristle
brush. (It is not necessary to reapply acrylic coating to
the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as
close as possible to the component body.
2. Bend into a "U" shape the end of each of three leads
remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the
corresponding leads extending from the circuit board
and crimp the "U" with long nose pliers to insure metal
to metal contact then solder each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor
leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the
circuit board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close
as possible to diode body.
2. Bend the two remaining leads perpendicular y to the
circuit board.
3. Observing diode polarity, wrap each lead of the new
diode around the corresponding lead on the circuit
board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder
joints of the two "original" leads. If they are not shiny,
reheat them and if necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board
hollow stake.
2. Securely crimp the leads of replacement component
around notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the
replaced component and adjacent components and the
circuit board to prevent excessive component
temperatures.

- 7 -
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed
circuit board will weaken the adhesive that bonds the foil
to the circuit board causing the foil to separate from or
"lift-off" the board. The following guidelines and
procedures should be followed whenever this condition is
encountered.
At IC Connections
To repair a defective copper pattern at IC connections use
the following procedure to install a jumper wire on the
copper pattern side of the circuit board. (Use this
technique only on IC connections).
1. Carefully remove the damaged copper pattern with a
sharp knife. (Remove only as much copper as
absolutely necessary).
2. carefully scratch away the solder resist and acrylic
coating (if used) from the end of the remaining copper
pattern.
3. Bend a small "U" in one end of a small gauge jumper
wire and carefully crimp it around the IC pin. Solder the
IC connection.
4. Route the jumper wire along the path of the out-away
copper pattern and let it overlap the previously scraped
end of the good copper pattern. Solder the overlapped
area and clip off any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper
pattern at connections other than IC Pins. This technique
involves the installation of a jumper wire on the
component side of the circuit board.
1. Remove the defective copper pattern with a sharp
knife.
Remove at least 1/4 inch of copper, to ensure that a
hazardous condition will not exist if the jumper wire
opens.
2. Trace along the copper pattern from both sides of the
pattern break and locate the nearest component that is
directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead
of the nearest component on one side of the pattern
break to the lead of the nearest component on the
other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is
dressed so the it does not touch components or sharp
edges.

TIMING CHART
- 8 -
VIDEO
SYNC
F
E
C
A
B
D
* PC INPUT

- 9 -
DISASSEMBLY
Thumb screw by turning it counterclockwise as shown.
Open the Cabinet latch.
1. Remove the screws.
2. Disassembly Stand.
# 1 # 2
# 3
1. Open the Back cover latch.
2. Disassemble Back cover.
# 4

- 10 -
LVDS
Main board
AUDIO
line-out
Regulator
D-SUB
DDR SDRAM
(128Mb)
Flash
(4mb)
Component
EEPROM
(24C02)
I2C
I2C
I2S
HDMI
EEPROM)
(24C02)
I2C
Y/Pb/Pr
TMDS
L/R I2S DAS
(UDA1334)
HDMI Receiver
(ANX9011)
RGB/YUV
Inverter
(6 CCFL)
LCD Panel
24 wide
(1920x1200)
USB UPx 1 USB DOWN x 2
USB 2.0 Hub
Power
PFC
AC in
Control
Speaker
(option)
DC out
12V
ADC(165MHz)
Digital
RGB/YUV
(162MHz)
Scaler (gm1601H-CF-LF)
LVDS
MUX
Digital
video
processor
Memory
controller Micro
RGB/HV
XOKOKCOMP XXOK
HDMI
(video
timing)
XXXD-SUB
COMP
HDMI
(PC
timing)
D-SUB
PIP
AD converter
(MST9883)
Analog SW
(BA7657)
$0.472
$2.32
$2.02
$0.46
KRW
3610 $0.553
$0.9
$10
BLOCK DIAGRAM-MAIN

BLOCK DIAGRAM-POWER
- 11 -
FAN1086
S1117-18 H/S
S1117-33 H/S
12VS
2.5V_DDR 2.5V_GM 3.3V_HDMI 1.8V_HDMI 3.3VA 1.8_CORE 1.8_DVI 1.8_ADC 3.3_DVI 3.3_PLL 3.3_ADC USB 3.3V 5V_MOD
12V
5VR 5VM
FAN1117
LD1086
BA033
BA033
BA033
IRF7314
70mA 175mA 90mA 320mA 250mA 250mA 490mA 20mA 25mA 90mA 120mA 1880mA
SI3865

LIPS Board Block Diagram
- 12 -
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER
ENERGY
TRANSFER
OUTPUT RECTIFIER
AND FILTER
15V
5V
GND
PHOTO-
COUPLER
ISOLATION
PWM
CONTROL
CIRCUIT
HVDC 100KHz
PRIMARY SECONDARY
50 ~ 60Hz
SIGNAL
Collection
and
Feedback
Operation description_Power
1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC,VCCI CISPR, the
circuit included a line-filter, across line capacitor and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.
3. Energy Transfer.
This part function is for transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to
adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized, and
also the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the DC output changing status through a photo transistor to primary controller to
achieve the stabilized DC output voltage.
6. Signal collection.
This part function is to collect the any change from the DC output and feed back to the primary through photo
transistor.

- 13 -
ADJUSTMENT
Windows EDID V1.0 User Manual
Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => Doesn’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available for LCD Monitor only.
1. Port Setup
a) Copy “UserPort.sys”file to
“c:\WINNT\system32\drivers”folder
b) Run Userport.exe
c) Remove all default number
d) Add 300-3FF
e) Click Start button.
f) Click Exit button.
2. EDID Read & Write
1) Run WinEDID.exe
2) Edit Week of Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update”button
c) Click “Write”button
3) If HDMI, use the 256byte tool.

- 14 -
220
IBM
Compatible PC
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC POWER
ST
VGS MONITOR
E
E
V-Sync On/Off Switch
(Switch must be ON.)
F
F
A
A
B
B
C
C
15
10
5
5
69
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Video Signal
Generator
Figure 1. Cable Connection
SERVICE OSD
1) Turn off the power switch at the right side of the display.
2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as described below.
a) NVRAM INITIAL : To make shipping state.
b) ADC CALIB RGB : RGB input calibration of ADC
c) ADC CALIB COMP : Component input calibration of ADC
d) AGING MODE : On / Off
e) ELAPSED TIME CLEAR : Erase using time.
f) WHITE BALANCE : Adjustment white balance manually.(Only HDMI(video), Component)

- 15 -
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK IC501
NO
NO
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK
U401(2.5V),U412(2.5)
U406(1.8V) LINE
NO CHECK CRYSTAL(U204)
YES
CHECK J104
VOLTAGE
PIN12,13,14 (5V)?
IS U401 PIN2(2.5V)
IS U412 PIN2(2.5V)
U403,U404 PIN2(3.3V)
U406 PIN2(1.8V)
CHECK IC501 PIN G4,G3
PULSE
1
2
3
14
Waveforms
1J104-#2,13,14 2U406-#2 3U403,U404-#2 4U204-#G3,G4
YES
YES

- 16 -
2. NO RASTER (OSD IS NOT DISPLAYED) –LIPS
CHECK U204 INVERTER
ON/OFF PORT
J104 PIN1 3.3V?
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK POWER BOARD
(LIPS)
CHECK J104
VOLTAGE
PIN12,13,14 (5V)?
NO
NO
NO
NO
CHECK J104
PIN 2
POWER BOARD (LIPS)
CHECK
PULSE AS
CONTACTING PROBE
TO THE LAMP
WIRE OF THE
LCD MODULE
REPLACE LCD MODULE
YES
1
2
3
4
YES
YES
YES
3J104-#2 3J104-#2
Brightness 100 Brightness 0
1J104-#12,13,14
4Lamp current
2J104-#1
Waveforms
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK SCALER DIM-ADJ
PORT
3. CHECK SCALER LAMPADJ
PORT

- 17 -
3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN
1. CHECK PIN G3,G4
SOLDERING CONDITION
2. CHECK X201
3. TROUBLE IN U204
CHECK U401 PIN2(2.5V)
U412 PIN2(2.5V)
U403,U404 PIN2(3.3V)
U406 PIN2(1.8V)
NO
NO
NO
CHECK U406(1.8V),
U401(3.3V)
U204
PIN G3,G4
14.3MHZ?
CHECK CONNECTION
LINE FROM D-SUB TO
U204
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK U204
PIN L4(H-SYNC) AND
PIN L3(V-SYNC).
IS PULSE APPEARED AT
SIGNAL PINS?
YES
1
Waveforms
1X201

- 18 -
4. TROUBLE IN DPM
TROUBLE IN DPM
TROUBLE IN IC501
CHECK PC
PC IS GOING
INTO DPM MODE
NO
CHECK H/V SYNC LINE
NO
YES
CHECK R120 AND
R122, SYNC
APPEARED?
CHECK
U204 X201
SYNC PULSE
YES
1H-SYNC 2V-SYNC
Waveforms
1
2

- 19 -
5. HDMI NO VIDEO
HDMI NO VIDEO
TROUBLE IN U302
NO
NO
YES
CHECK U411 PIN2
(5V)
CHECK
U402,U405 EACH
(3.3V&1.8V)
YES
CHECK 5VR & HDMI ON
SIGNAL
CHECK U402 & U405
NO
CHECK
R662,R663 THERE
ARE NO SYNC
YES
CHECK DATA LINE
NO
CHECK
HOT PLUG
DETECTION IS HIGH
YES
CHECK DVD PLAYER
CONNECTION OR Q601
AND DDC
COMMUICATION LINE
OR EDID DATA

- 20 -
6. COMPONENT NO VIDEO
COMPONENT NO VIDEO
TROUBLE IN U302
NO
NO
YES
CHECK U409 PIN2
(5V)
CHECK
U407 PIN 3 (3.3VA)
YES
CHECK 5VS & VIDEO ON
SIGNAL
CHECK U407
NO
CHECK
R347,349 THERE
ARE NO SYNC
YES
CHECK DATA LINE
NO
CHECK COMPONENT
Y OK?
YES
CHECK DVD PLAYER
CONNECTION OR Q601
AND DDC
COMMUICATION LINE