JVC LT-19D200 Schematic
SERVICE MANUAL
LCD TELEVISION BUILT-IN DVD PLAYER
YA711<Rev.002>20097SERVICE MANUAL
LT-19D200/AK
HIGH DEFINITION TELEVISION
There may be multiple versions of
this TV model.
The TV version is identified by the
letters next to the model number
on the TV's Rating.
(See illustration).
Use the service manual that
matches the version of the TV.
COPYRIGHT © 2009 Victor Company of Japan, Limited
MODEL NAME
LT-19D200
MODEL NO.
RATING LABEL (REAR)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
VERSION
AK
COPYRIGHT © 2009 Victor Company of Japan, Limited
No.YA711<Rev.002>
2009/8
SPECIFICATION
Items Contents
Dimensions ( W × H × D ) 47.75 cm × 36.58 cm × 21.0 cm (18.8" × 14.5" × 8.3") [with stand]
Mass 4.5 kg (10.0 lbs) [with stand]
Power Input AC120 V , 60 Hz
Power Consumption 65 W (Max)
TV RF System
(Analog / Digital)
Color System (Analog) NTSC
Stereo System (Analog) BTSC (Multi Channel Sound)
Teletext System (Analog) Closed caption (T1-T4 / CC1-CC4)
TV Receiving Channels
and Frequency (Analog)
TV / CATV Total Channel 191 Channels
Intermediate Frequency
(Analog)
Color Sub Carrier Frequency (Analog) 3.58 MHz
LCD Panel 19" class (18.5" Diagonal) wide aspect (16 : 9)
Display Pixels Horizontal : 1366 dots × Vertical : 768 dots (W-XGA)
Audio Power Output 1 W + 1 W
Speaker Oval type × 2
Discs (Playback compatibility) DVD video, DVD-RW/-R, DVD+RW/+R, audio CD, video CD, CD-RW/-R
Frequency response DVD (linear sound) 20 Hz to 20 kHz (sample rate: 48 kHz), 20 Hz to 44 kHz (sample rate: 96 kHz)
Signal-to-noise ratio (S/N ratio) CD: 90 dB (JEITA)
Total distortion factor DVD 1 KHz 0.007% (JEITA)
Antenna Terminal
(VHF/UHF, ATSC / DIGITAL CABLE IN)
Video / Audio Input
[VIDEO]
Video / Audio Input
[COMPONENT]
Digital Input Digital(Video/Audio) HDMI 2-row 19pin connector × 1
PC (RGB) Input Video D-sub 15 pin × 1
Digital Audio output 500 mV (rms), Coaxial × 1
Remote Control Unit RM-C2152 (AA/R6 battery × 2)
Component Video
VHF Low
VHF High
Video IF
Sound IF
S-Video Mini-DIN 4 pin × 1
1080i / 720p
480p / 480i
Analog (Audio) 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2
Design & specifications are subject to change without notice.
47.75 cm × 33.04 cm × 13.47 cm (18.8" × 13.1" × 5.4") [without stand]
4.1 kg (9.1 lbs) [without stand]
Analog
CCIR (M)
Digital
ATSC terrestrial / Digital cable
02 ch - 06 ch : 54 MHz - 88 MHz
07 ch - 13 ch : 174 MHz - 216 MHz
UHF
14 ch - 69 ch : 470 MHz - 806 MHz
CATV
54 MHz - 804 MHz
Low Band : 02 - 06
High Band : 07 - 13
Mid Band : 14 - 22
Super Band : 23 - 36
Hyper Band : 37 - 64
Ultra Band : 65 - 94, 100 - 135
Sub Mid Band : 01, 96 - 99
45.75 MHz
41.25 MHz (4.5 MHz)
CD 20 Hz to 20 kHz
CD 1 KHz 0.007% (JEITA)
F-type connector, 75Ω unbalanced, coaxial × 1
Y: 1 V (p-p), Positive (Negative sync.), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
Video 1 V (p-p), Positive (Negative sync.), 75 Ω, RCA pin jack × 1
Audio 500 mV (rms), High impedance, RCA pin jack × 2
RCA pin jack × 3
Y : 1 V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75 Ω
Pb/Pr : ±0.35V(p-p), 75 Ω
Y : 1 V (p-p), Positive (Negative sync.), 75 Ω
Cb/Cr : 0.7V(p-p), 75 Ω
Audio 500 mV (rms), High impedance, RCA pin jack × 2
(Digital-input terminal is not compatible with picture signals of personal computer)
Video: Supported format: 1080i / 720p / 480p / 480i
Audio: 2ch L-PCM, 32 / 44.1 / 48 KHz, 16 / 20 / 24 bit
R/G/B : 0.7 V (p-p), 75Ω
HD / VD : 1 V (p-p) to 5 V (p-p), high impedance
Audio 3.5 mm stereo mini jack × 1
1-2 (No.YA711<Rev.002>)
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(1) The design of this product contains special hardware,
many circuits and components specially for safety
purposes. For continued protection, no changes should be
made to the original design unless authorized in writing by
the manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be
performed by qualified personnel only.
(2) Alterations of the design or circuitry of the products should
not be made. Any design alterations or additions will void
the manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
(4) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.
(5) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(6) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
b) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal part of the cabinet, particularly
any exposed metal part having a return path to the chassis,
to a known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).
Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use
an AC voltmeter having 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to
0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T
(No.YA711<Rev.002>)1-3
1.2 LASER BEAM SAFETY PRECAUTIONS
This DVD player uses a pickup that emits a laser beam.
Do not look directly at the laser beam coming
from the pickup or allow it to strike against your
skin.
The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30
cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.
CAUTION:
Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.
Drive Mechanism
Assembly
Laser Beam Radiation
Laser Pickup
Turntable
Location: Top of LCD module.
1-4 (No.YA711<Rev.002>)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 STANDARD NOTES FOR SERVICING
2.1.1 CIRCUIT BOARD INDICATIONS
(1) The output pin of the 3 pin Regulator ICs is indicated as
shown.
Top View
Bottom View
Input
Out
(2) For other ICs, pin 1 and every fifth pin are indicated as
shown.
In
5
Pin 1
10
(3) The 1st pin of every male connector is indicated as shown.
Pin 1
2.1.2 INSTRUCTIONS FOR CONNECTORS
(1) When you connect or disconnect the FFC (Flexible Foil
Connector) cable, be sure to first disconnect the AC cord.
(2) FFC (Flexible Foil Connector) cable should be inserted
parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
2.1.4 HOW TO REMOVE / INSTALL FLAT PACK-IC
2.1.4.1 REMOVAL
WITH HOT-AIR FLAT PACK-IC DESOLDERING MACHINE:
(1) Prepare the hot-air flat pack-IC desoldering machine,
then apply hot air to the Flat Pack-IC (about 5 to 6
seconds). (Fig.2-1)
Fig.2-1
(2) Remove the flat pack-IC with tweezers while applying
the hot air.
(3) Bottom of the flat pack-IC is fixed with glue to the PWB;
when removing entire flat pack-IC, first apply soldering
iron to center of the flat pack-IC and heat up. Then
remove (glue will be melted). (Fig.2-6)
(4) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
CAUTION:
(1) The Flat Pack-IC shape may differ by models. Use an
appropriate hot-air flat pack-IC desoldering machine,
whose shape matches that of the Flat Pack-IC.
(2) Do not supply hot air to the chip parts around the flat
pack-IC for over 6 seconds because damage to the
chip parts may occur. Put masking tape around the flat
pack-IC to protect other parts from damage. (Fig.2-2)
(3) The flat pack-IC on the PWB is affixed with glue, so be
careful not to break or damage the foil of each pin or
the solder lands under the IC when removing it.
* Be careful to avoid a short circuit.
2.1.3 PB (LEAD) FREE SOLDER
Pb free mark will be found on PCBs which use Pb free
solder. (Refer to figure.) For PCBs with Pb free mark, be sure
to use Pb free solder. For PCBs without Pb free mark, use
standard solder.
Pb free mark
CBA
Masking
Tape
Tweezers
Hot-air
Flat Pack-IC
Desoldering
Machine
Flat Pack-IC
Fig.2-2
(No.YA711<Rev.002>)1-5
WITH SOLDERING IRON:
(1) Using desoldering braid, remove the solder from all pins
of the flat pack-IC. When you use solder flux which is
applied to all pins of the flat pack-IC, you can remove it
easily. (Fig.2-3)
Flat Pack-IC
Desoldering Braid
Soldering Iron
Fig.2-3
(2) Lift each lead of the flat pack-IC upward one by one,
using a sharp pin or wire to which solder will not adhere
(iron wire). When heating the pins, use a fine tip
soldering iron or a hot air desoldering machine. (Fig.2-4)
WITH IRON WIRE:
(1) Using desoldering braid, remove the solder from all pins
of the flat pack-IC. When you use solder flux which is
applied to all pins of the flat pack-IC, you can remove it
easily. (Fig.2-3)
(2) Affix the wire to a workbench or solid mounting point, as
shown in Fig.2-5.
(3) While heating the pins using a fine tip soldering iron or
hot air blower, pull up the wire as the solder melts so as
to lift the IC leads from the PWB contact pads as shown
in Fig.2-5.
(4) Bottom of the flat pack-IC is fixed with glue to the PWB;
when removing entire flat pack-IC, first apply soldering
iron to center of the flat pack-IC and heat up. Then
remove (glue will be melted). (Fig.2-6)
(5) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
NOTE:
When using a soldering iron, care must be taken to ensure
that the flat pack-IC is not being held by glue. When the flat
pack-IC is removed from the PWB, handle it gently because
it may be damaged if force is applied.
Hot Air Blower
Sharp
Pin
Fine Tip
Soldering Iron
Fig.2-4
(3) Bottom of the flat pack-IC is fixed with glue to the PWB;
when removing entire flat pack-IC, first apply soldering
iron to center of the flat pack-IC and heat up. Then
remove (glue will be melted). (Fig.2-6)
(4) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
To Solid
Mounting Point
CBA
Tweezers
or
Iron Wire
Soldering Iron
Fig.2-5
Fine Tip
Soldering Iron
Flat Pack-IC
1-6 (No.YA711<Rev.002>)
Fig.2-6
2.1.4.2 INSTALLATION
(1) Using desoldering braid, remove the solder from the foil of
each pin of the flat pack-IC on the PWB so you can install
a replacement flat pack-IC more easily.
(2) The z mark on the flat pack-IC indicates pin 1. (See Fig.2-
7.) Be sure this mark matches the 1 on the PCB when
positioning for installation. Then presolder the four corners
of the flat pack-IC. (See Fig.2-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none of the
pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig.2-7
2.1.5 INSTRUCTIONS FOR HANDLING SEMICONDUCTORS
Electrostatic breakdown of the semi-conductors may occur due
to a potential difference caused by electrostatic charge during
unpacking or repair work.
2.1.5.1 Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is properly
grounded to remove any static electricity that may be charged on
the body.
2.1.5.2 Ground for Workbench
Be sure to place a conductive sheet or copper plate with proper
grounding (1MΩ) on the workbench or other surface, where the
semi-conductors are to be placed. Because the static electricity
charge on clothing will not escape through the body grounding
band, be careful to avoid contacting semi-conductors with your
clothing.
<I
ncorrec
t
>
CBA
Presolder
Fig.2-8
Flat Pack-IC
<
C
orrec
1M
CBA
t
>
Grounding Band
1M
CBA
Conductive Sheet or
Copper Plate
(No.YA711<Rev.002>)1-7
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY FLOWCHART
This flowchart indicates the disassembly steps for the cabinet
parts, and the PWB in order to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order.
Bend, route and dress the cables as they were.
[17] Junction-A
PWB
[6] Jack Holder
(D)
[7] Digital Main
PWB Unit
[4] DVD
Mechanism
[5] DVD Main
PWB Unit
[13] Speaker
Holder (s)
[14] Speaker (s)
3.2 DISASSEMBLY METHOD
[1] Stand
Assembly
[2] Rear Cabinet
[3] DVD Holder
[10] Main PWB
[11] Stand Holder
[12] LCD Module
Assembly
[19] Front
Cabinet
[15] Junction-C
PWB
[16] Junction-B
PWB
[8] Jack Holder
(A)
[9] Jack PWB
[18] Function
PWB
Step/
Loc.
Part
No.
Jack
[6]
Holder(D)
Digital Main
[7]
PWB UnitD3D5
Jack
[8]
Holder(A)
[9] Jack PWB
[10] Main PWB
Stand
[11]
Holder
LCD
[12]
Module
Assembly
Speaker
[13]
Holder(s)
Removal
Remove/*Unhook/
Fig.
No.
Unlock/Release/
Unplug/Unclamp/
Note
Desolder
D3 (S-8) ---
4(S-9), (S-10),
4(S-11), 2(H-1),
*CN301, *CN302,
*CN303, *CN3902,
Shield Box
D3 (S-12) ---
D3D54(S-13), CN702,
*CN861A
7(S-14), *CN102,
D3
*CN201, *CN862A,
D5
*CN1001, *CN1002
D4 2(S-15), (S-16) ---
D4 --------------- ---
D4 4(S-17) ---
---
---
---
Step/
Loc.
Part
No.
Stand
[1]
Assembly
Rear
[2]
Cabinet
[3] DVD Holder
DVD
[4]
MechanismD2D5
DVD Main
[5]
PWB Unit
Removal
Remove/*Unhook/
Fig.
No.
Unlock/Release/
Unplug/Unclamp/
Note
Desolder
D1 3(S-1) ---
D1 10(S-2), 2(S-3), (S-4) ---
D2D54(S-5), 3(S-6),
*CN901, *CN902
(S-7), *CN201,
*CN301, *CN801
D2 --------------- ---
---
[14] Speaker(s) D4 --------------- ---
Junction-C
[15]
PWB
Junction-B
[16]
PWB
Junction-A
[17]
PWB
Function
[18]
PWB
Front
[19]
Cabinet
1
2
(1) (2) (3) (4) (5)
D4
Desolder ---
D5
D4
Desolder ---
D5
D4
Desolder ---
D5
D4
2(S-18) ---
D5
D4 --------------- ---
3
4
5
6
1-8 (No.YA711<Rev.002>)
NOTE;
(1) Order of steps in procedure. When reassembling, follow
the steps in reverse order. These numbers are also used
as the Identification (location) No. of parts in figures.
(2) Parts to be removed or installed.
(3) Fig. No. showing procedure of part location
(4) Identification of parts to be removed, unhooked, un-
locked, released, unplugged, unclamped, or desoldered.
P = Spring, L = Locking Tab, S = Screw, H = Hex Screw,
CN = Connector * = Unhook, Unlock, Release, Unplug,
or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two
Locking Tabs (L-2)
(5) Refer to the following "Reference Notes in the Table."
REFERENCE NOTES
(1) CAUTION 1: Electrostatic breakdown of the laser diode
in the optical system block may occur as a potential dif-
ference caused by electrostatic charge accumulated on
cloth, human body etc., during unpacking or repair work.
To avoid damage of pickup follow next procedures.
a) Short the three short lands of FPC cable with sol-
der before removing the FFC cable (CN201) from
it. If you disconnect the FFC cable (CN201), the laser diode of pickup will be destroyed. (Fig. D2)
b) Disconnect the Connectors (CN301), and
(CN801). Remove Screw (S-7) and remove the
DVD Main PWB Unit. (Fig. D2)
(2) Reassembly Notes of New DVD Mechanism:
a) To remove the Chassis Cover, remove two screws
A as shown in Fig. D2.
b) To avoid damage of the pickup unit (laser diode),
confirm that the three short lands (either of two
places) are shorted out by soldering between them
as shown in View A in Fig. D2.
c) Connect the FFC cables of the new DVD Mecha-
nism to the three connectors (CN201, CN301,
CN801) on the DVD Main PWB Unit.
d) After confirming that the FFC cables are securely
connected to the three connectors, remove the solder from the three short lands. If the solder is not
removed, the laser diode will not light and it will not
be possible to read discs.
e) Insert the pin A on the Chassis Cover into the hole
A on the Main Chassis as shown in Fig. D2. Then
tighten two screws A to install the Chassis Cover.
(3) CAUTION 2: When reassembling, confirm the FFC cable
(CN201) is connected completely. Then remove the sol-
der from the three short lands of FPC cable. (Fig. D2)
(4) How to eject a disc in emergency
Press and hold [EJECT] on the unit for more than 5 sec-
onds.
(5) How to eject manually 1
a) Remove the Rear Cabinet.
b) Rotate the gear in the direction of the arrow as
shown below.
B
View for B
The gear is turned to the direction
of the arrow.
(6) How to eject manually 2
a) Remove the Rear Cabinet.
b) To remove the DVD Main PWB Unit, remove a
screw (S-7) in Fig. D2. Do not disconnect connectors.
c) To remove the Chassis Cover, remove two screws
A as shown in Fig. D2.
d) Remove a disc.
(No.YA711<Rev.002>)1-9
[2] Rear Cabinet
(S-2)
(S-4)
(S-2)
(S-3)
1-10 (No.YA711<Rev.002>)
(S-2)
[1] Stand Assembly
(S-1)
Fig. D1
(S-5)
(S-7)
[3] DVD Holder
[5] DVD Main PWB unit
(S-6)
[4] DVD Mechanism
A
Remove two screws A, then short the three short lands by soldering as shown in View for A.
Chassis Cover
Pin A
Either of two places
Screws A
A
(S-6)
FPC Cable
View for A
Hole A
Main Chassis
Fig. D2
(No.YA711<Rev.002>)1-11
(S-11)
[7] Digital Main
PWB Unit
Shield Box
[6] Jack Holder(D)
(S-8)
(S-9)
(H-1)
(S-12)
(S-10)
(S-9)
[8] Jack Holder(A)
(S-13)
(S-14)
[10] Main PWB
[9] Jack PWB
(S-14)
Fig. D3
1-12 (No.YA711<Rev.002>)
[19] Front Cabinet
[17] Junction-A
CBA
[15] Junction-C
CBA
[14] Speaker
(S-17)
[13] Speaker
Holder
(S-18)
[18] Function CBA
[16] Junction
-B CBA
[13] Speaker
Holder
[14] Speaker
(S-17)
[12] LCD Module
Assembly
(S-15)
[11] Stand Holder
(S-16)
Fig. D4
(No.YA711<Rev.002>)1-13
SECTION 4
ADJUSTMENT
4.1 GENERAL NOTE: "PWB" IS ABBREVIATION FOR
"CIRCUIT BOARD ASSEMBLY."
NOTE:
Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements
have been completed. Also, do not attempt these adjustments
unless the proper equipment is available.
4.2 TEST EQUIPMENT REQUIRED
(1) NTSC Pattern Generator (Color Bar W/White Window, Red
Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)
(2) Remote control unit
(3) Color Analyzer
4.3 HOW TO MAKE THE SERVICE REMOTE CONTROL
UNIT:
Cut "A" portion of the attached remote control unit as shown in
Fig. 1.
service button
(There is a button under the plastic housing.)
4.5 PURITY CHECK MODE
This mode cycles through full-screen displays of red, green, blue,
and white to check for non-active pixels.
(1) Enter the Service mode.
(2) Each time pressing [7] button on the service remote control
unit, the display changes as follows.
Purity Check Mode
White mode
[7] button
[7] button
Black mode
[7] button
Red mode
A
4.4 HOW TO SET UP THE SERVICE MODE:
Service mode:
(1) Use the service remote control unit.
(2) Turn the power on.
(3) Press the service button on the service remote control
unit. The following screen appears.
"*" differs depending on the models.
Code :
***********-***
Pic code :
**-***-**-*****-***
MIPS :
Push 0key
Tuner :
****-*****-****
safety_Non
Safety :
[7] button
Green mode
Fig. 1
[7] button
Blue mode
[7] button
White 20% mode
Note:
When entering this mode, the default setting is White mode.
1-14 (No.YA711<Rev.002>)
4.6 VCOM ADJUSTMENT
Test Point Adj. Point
Screen
M. EQ. Spec.
Color analyzer See below
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
Perpendicularity
L = 3 cm
[CHANNEL UP/DOWN ]
buttons
Figure
Color Analyzer
4.7 WHITE BALANCE ADJUSTMENT
The white balance adjustment should be performed when
replacing the LCD Panel or Digital PWB.
Purpose: To mix red, green and blue beams correctly for pure
white.
Symptom of Misadjustment: White becomes bluish or reddish.
Test Point
Screen
Adj. Point Mode Input
[VOLUME
DOWN]
button
[VIDEO1]
C/D
White Raster
(APL 70%)
or
(APL 40%)
M. EQ. Spec.
Pattern Generator,
Color analyzer
x= 0.272 ± 0.005
y= 0.278 ± 0.005
Figure
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
Perpendicularity
(1) Operate the unit for more than 20 minutes.
(2) Set the color analyzer and bring the optical receptor to the
center on the LCD-Panel surface after zero point calibration as shown above. Note: The optical receptor must be
set perpendicularly to the LCD Panel surface.
(3) Enter the Service mode.
(4) Press [3] button on the service remote control unit.
(5) Press [CHANNEL UP/DOWN] buttons on the service re-
mote control unit so that the color analyzer value becomes
minimum.
L = 3 cm
INPUT: WHITE 70%, 40%
(1) Operate the unit for more than 20 minutes.
(2) Input the White Raster(70%=70IRE, 40%=40IRE).
INPUT SIGNAL
0IRE 0IRE
100IRE
40%=40IRE
(3) Set the color analyzer to the CHROMA mode and bring the
optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to
the LCD Panel surface.
(4) Enter the Service mode. Press [VOLUME DOWN] button
on the service remote control unit and select "C/D" mode.
(5) [CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment.
Press [3] button to select “COB” for Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive adjustment.
Press [6] button to select “DB” for Blue Drive adjustment.
(6) In each color mode, press [CHANNEL UP/DOWN] buttons
to adjust the values of color.
(7) Adjust Cutoff and Drive so that the color temperature be-
comes 12000°K (x= 0.272 / y= 0.278 ±0.005).
Color Analyzer
Low
Hight
Light
Light
70%=70IRE
100IRE
(No.YA711<Rev.002>)1-15
4.8 HOW TO INITIALIZE THE LCD TV/DVD
The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to
select a language and program channels after the set has been initialized.
To put the program back at the factory-default, initialize the LCD TV/DVD using the following procedure.
4.8.1 DVD SECTION
Turn the power on.
(1)
(2) To enter the service mode, press the service button on the
service remote control unit.
- To cancel the service mode, press [POWER] button on
the service remote control unit.
(3) To put the LCD TV/DVD into the DVD mode, press [CH RE-
TURN] on the remote control unit.
(4) To put the LCD TV/DVD into the Flash clear mode, press
[INPUT SELECT] buttons on the remote control unit in that
order within five seconds. The following screen appears.
Flash Memory Clear : OK
CHUCKING ON
4.8.2 LCD TV SECTION
(1) Turn the power on.
(2) To enter the service mode, press the service button on the
service remote control unit.
- To cancel the service mode, press [POWER] button on
the service remote control unit.
(3) Press [INFO] button on the service remote control unit to
initialize the LCD television.
(4) "INITIALIZED" will appear in the upper right of the screen.
"INITIALIZED" color will change to green from red when initializing is complete.
When "OK" appears on the screen, the factory default will
be set.
(5) To exit this mode, press[CHANNEL UP/DOWN] button to
go to TV mode, or press [POWER] button to turn the power
off.
1-16 (No.YA711<Rev.002>)
4.9 FIRMWARE RENEWAL MODE
4.9.1 DVD SECTION
(1) Turn the power on and press [EJECT] button on the remote
control unit to put the LCD TV/DVD into DVD mode. Then
remove the disc.
(2) To put the LCD TV/DVD into F/W version up mode, press
[9], [8], [7], [6], and [MODE] buttons on the remote control
unit in that order.
Fig. a appears on the screen.
"
" differs depending on the models.
*******
F/W Version Up Mode Model No : ******
Please insert a DISC
for F/W Version Up.
VERSION : *.**
At this time, no button is available.
(6) Remove the disc.
(7) Unplug the AC cord from the AC outlet. Then plug it again.
(8) Press [EJECT] button on the remote control unit to put the
LCD TV/DVD into DVD mode again.
(9) Press [1], [2], [3], [4], and [INFO] buttons on the remote
control unit in that order. Fig. d appears on the screen.
"
" differs depending on the models.
*******
MODEL : ******
Version
Region
: *.**
: *
EXIT: SELECTEEPROM CLEAR : CLEAR
EXIT: SELECT
Fig. a Version Up Mode Screen
(3) Insert the disc for version up into the disc slot.
(4) The LCD TV/DVD enters the F/W version up mode auto-
matically. Fig. b appears on the screen. Make sure to insert
the proper F/W for the state of this model.
"
" differ depending on the models.
*******
(*1)
F/W Version Up Mode Model No : ******
VERSION : ************.***
Reading...
VERSION : *.**
Fig. b Programing Mode Screen
The appearance shown in (*1) of Fig. b is described as follows:
No. Appearance State
1 Reading... Sending files into the memory
2 Erasing... Erasing previous version data
3 Programming... Writing new version data
Fig. d
(10) Press [CLEAR] button on the remote control unit. Fig. e ap-
pears on the screen.
"
" differs depending on the models.
*******
MODEL : ******
Version
Region
: *.**
: *
EXIT: SELECTEEPROM CLEAR : CLEAR
EEPROM CLEAR : OK
Fig. e
When “OK” appears on the screen, the factory default will
be set. Then the firmware renewal mode is complete.
(11) To exit this mode, press [CHANNEL UP/DOWN] button to
go to TV mode, or press [POWER] button to turn the power
off.
(5) After programming is finished, the disc will be ejected auto-
matically. Fig. c appears on the screen and the checksum
will be shown in (*2).
"
" differ depending on the models.
*******
(*2)
F/W Version Up Mode
VERSION : ************.***
Completed
SUM : ****
Model No : ******
VERSION : *.**
Fig. c Completed Program Mode Screen
(No.YA711<Rev.002>)1-17
4.9.2 LCD TV SECTION
4.9.2.1 EQUIPMENT REQUIRED
a. USB memory
b. Remote Control Unit
4.9.2.2 FIRMWARE UPDATE PROCEDURE
NOTE:
There are two states (the User Upgrade and the Factory Upgrade) in firmware update.
User Upgrade Upgrade the firmware only. The
setting values are not initialized.
Factory upgrade Upgrade the firmware and initialize
the setting values.
The identification of User Upgrade and Factory Upgrade are
done by the filename.
(1) Turn the power off and unplug the AC Cord.
(2) Insert the USB memory to the USB port as shown below.
Rear Cabinet
USB port
The appearance shown in *1 is described as follows.
Appearance State
Downloading... Downloading the firmware from the USB
memory.
Writing... Writing the downloaded firmware in flash
memory.
Checking... Checking the new firmware.
(5) When the firmware update is completed, the following will
appear on the screen.
Software Upgrade
The software upgrade is completed.
Remove USB storage device, unplug and replug power code.
USB Memory
(3) Plug the AC cord in the wall outlet and turn the power on.
(4) The update will start and the following will appear on the
screen.
Software Upgrade
Software upgrade in progress. Please wait.
Do not remove the USB device or turn the TV off
while upgrade is in progress.
*1
Downloading...
0%
Unplug the AC cord and kindly remove the USB memory
from the USB port. Plug the AC cord in the wall outlet again
and turn the power on.
NOTE:
When the Factory Upgrade is used, after restarting TV,
shift to initial screen menu in service mode. "INITIALIZED" will appear on the upper right of the screen. "INITIALIZED" color will change to green from red when
initializing is complete.
NOTE:
If the above screen isn’t displayed, repeat from step 1.
1-18 (No.YA711<Rev.002>)
[ Power Supply Section ]
FLOW CHART NO.1
The power cannot be turned on.
SECTION 5
TROUBLESHOOTING
Is the fuse (F601) normal?
Ye s
Is normal state restored when once un
power cord is plugged again several seconds?
Ye s
Is the INV+31V line voltage normal?
Ye s
Check each rectifying circuit of the secondar
circuit and service it if def
FLOW CHART NO.2
The fuse blows out.
Check the presence that the primary component
is leaking or shorted and service it if defective.
After servicing, replace the fuse.
FLOW CHART NO.3
When the output voltage fluctuates.
ective.
plugged
No
No
No
y
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or short-circuiting on the
primary circuit component, and service it if defective.
(D601, D602, D603, D604, Q601, Q602, T601)
Check the prese
is shorted in each rectifying circuit of secondar
and service it if defective.
nce that the rectifying diode or circuit
y side,
Does the photocoupler circuit on
secondary side operate normally?
Check IC601, D608, D610 and their per
circuit and service it if def
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side
f
and service it if de
Q904, D631, D632, D636, D638, D639, D640, D
FLOW CHART NO.5
INV+31V is not output.
Is approximately +31V voltage supplied to the
cathode of D632?
Check D667, R655 and their peripher
service it if defective.
ective. (IC631, IC901, Q201, Q205, Q206, Q634, Q635, Q6
the
Ye s
iphery,
ective.
641, D643)
Ye s
y circuit, and
No
No
Check IC601, D633, Q631 and their periphery
circuit, and service it if defective.
36, Q637, Q640, Q641, Q643, Q901, Q9
Check C632, D632, D633 and their periphery
circuit, and service it if defective.
,
03,
(No.YA711<Rev.002>)1-19
FLOW CHART NO.6
PANEL+24.5V is not output.
Is approximately +30V voltage supplied to the collector
of Q205?
Ye s
Check Q202, Q203, D203, P-O
iphery circuit, and service it if defective.
per
N-H1 line and their
FLOW CHART NO.7
PANEL+13V is not output.
Is approximately +15V voltage supplied to the
collector of Q201?
Ye s
Is approximately +13V voltage supplied to the
base of Q201?
Ye s
Replace Q201.
FLOW CHART NO.8
P-ON+7V is not output.
No
No
No
See FLOW CHART No.5
Check C631, D631, D668 and their periphery circuit,
and service it if defective.
Check Q202, Q203, D201, D202, D210 and their
iphery circuit, and ser
per
vice it if defective.
Is approximately +7V voltage supplied to the
cathode of D641?
Ye s
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
FLOW CHART NO.9
P-ON+5V is not output. (PANEL+13V is outputted normally.)
Is approximately +6.8V voltage supplied to the
collector of Q635?
Ye s
Is approximately +6V voltage supp
base of Q635 and the
base of Q636?
lied to the
Ye s
Replace Q635 and Q636.
No
No
No
Check C641, D641 and their periphery circuit,
and service it if defective.
See FLOW CHAR
Check D659 and their per
ective.
it if def
T No.8
iphery circuit, and service
1-20 (No.YA711<Rev.002>)
FLOW CHART NO.10
TUNER+5V is not output. (PANEL+13V is outputted normally.)
Is approximately +6.7V voltage supplied to the
collector of Q637?
Ye s
Is approximately +6V voltage supplied to the
base of Q637?
Ye s
Replace Q637.
FLOW CHART NO.11
P-ON+3V is not output.
Is approximately +3V voltage supplied to the
cathode of D638?
Ye s
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
FLOW CHART NO.12
P-ON+3.3V(PANEL+3.3V) is not output.
No
No
No
See FLOW CHART No.8
Check D659 and their periphery circuit, and service
it if defective.
Check C638, D638 and their periphery circuit, and
service it if def
ective.
Is appro
ximately +5V voltage supplied to the
cathode of D639?
Ye s
Is the "H" signal (approximately +3.5V) inputted to the
base of Q640?
Ye s
Replace Q640.
FLOW CHART NO.13
EV+3.3V is not output.
Is approximately +4.6V voltage supplied to the
collector of Q903?
Ye s
Check Q903, D905 and their periphery
circuit, and service it if defective.
No
No
No
Check C639, D639 and their periphery circuit, and
service it if def
ective.
Check Q638, Q639, P-ON-H2 line and their periphery
circuit, and service it if defective.
Check C638, D638 and their periphery circuit, and
service it if defective.
(No.YA711<Rev.002>)1-21
FLOW CHART NO.14
DVD-ON+3.3V is not output.
Is approximately +5V voltage supplied to the
collector of Q904?
Ye s
Check Q904, D906, and their periphery
circuit, and service it if def
ective.
FLOW CHART NO.15
EV+9V is not output. (PANEL+13V is outputted normally.)
Is approximately +13V voltage supplied to the
collector of Q905?
Ye s
Check Q905, D901 and their per
iphery circuit, and
service it if defective.
FLOW CHART NO.16
EV+1.2V is not output.
Is approximately +5V voltage supplied to the
emitter of Q901?
Ye s
Is approximately +4V voltage supplied to Pin(3) of
IC901?
Ye s
No
No
No
No
Check C638, D638 and their periphery circuit, and
service it if defective.
Check C643, D643, D644 and their periphery circuit,
and service it if defective.
Check C640, D640 and their per
iphery circuit,
and service it if defective.
Check Q901, Q902, DVD-MAIN PWR line and their
periphery circuit, and service it if defective.
Replace IC901.
FLOW CHART NO.17
P-ON+9V is not output. (PANEL+13V is outputted normally.)
Is approximately +13V voltage supplied to the
collector of Q641?
Ye s
Is approximately +10V voltage supplied to the
base of Q641?
Ye s
Replace Q641.
No
No
Check C643, D643, D644 and their periphery circuit,
and service it if defective.
Check D666 and their periphery circuit, and ser
vice
it if defective.
1-22 (No.YA711<Rev.002>)
FLOW CHART NO.18
AL+3.3V is not output.
Is approximately +34V voltage supplied to the
collector of Q634?
Ye s
Is approximately +5V voltage supplied to Pin(1) of
IC631?
Ye s
Replace IC631.
FLOW CHART NO.19
LCD-7.1V is not output.
Is appro
ximately -9V voltage supplied to the
Anode of D636?
Ye s
Is appro
ximately -8V v
oltage supplied to the
base of Q206?
Ye s
Replace Q206.
No
No
No
No
See FLOW CHART No.5
Check Q634, D650 and their per
iphery circuit, and
service it if defective.
Check C636, D636, D637 and their periphery
circuit, and service it if def
ective.
Check Q202, Q203, D204, P-ON-H1 line and their
periphery circuit, and service it if defective.
(No.YA711<Rev.002>)1-23
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