This Service Manual is for the
LT6-M22BB(A8C72EP)
/LT6-M22WB(A8C73EP) model.
For the LT6-M22BB(A8C72EP)
/LT6-M22WB(A8C73EP) model,
the letter (A8C72EP)/(A8C73EP) is
printed on the Serial No. Label.
Refer to the Serial No. Label on the
right.
The LCD panel is manufactured to provide many years of useful life.
Occasionally a few non active pixels may appear as a tiny spec of color.
This is not to be considered a defect in the LCD screen.
Page 3
SPECIFICATIONS
< TUNER >
VHS/UHF Input ----------- 75Ω unbal., IEC Connector
Center IF ------------------- SECAM-L 38.9MHz, SECAM-L’ 33.9MHz
Note: Nominal specifications represent the design specifications. All units should be able to approximate these.
Some will exceed and some may drop slightly below these specifications. Limit specifications represent
the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet
limit specifications.
VIDEO
Component
dB
dB
---
---
>45/45
>45/45
1-2A8C70SP
Page 5
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.
Safety Precautions for LCD TV
Circuit
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 have been defeated during
servicing. (1) Protective shields are provided
on this chassis to protect both the technician
and the customer. Correctly replace all missing
protective shields, including any removed for
servicing convenience. (2) When reinstalling
the chassis and/or other assembly 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. Servicers who defeat safety
features or fail to perform safety checks
may be liable for any resulting damage.
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 LCD module
and the cabinet mask, (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 ohmmeter
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 230 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 water pipe,
conduit, etc.) to all exposed metal parts of the
instrument (antennas, handle brackets, metal
cabinet, screw heads, metallic overlays, control
shafts, etc.), especially any exposed metal
parts that offer an electrical return path to the
chassis. Any current measured must not
exceed 0.5 milli-ampere. Reverse the
instrument power cord plug in the outlet and
repeat the test.
READING SHOULD
NOT BE ABOVE 0.5 mA
LEAKAGE
DEVICE
BEING
TESTED
TEST ALL EXPOSED
METAL SURFACES
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
ANY MEASUREMENTS NOT WITHIN THE
LIMITS SPECIFIED HEREIN INDICATE A
POTENTIAL SHOCK HAZARD THAT MUST
BE ELIMINATED BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER OR
BEFORE CONNECTING THE ANTENNA OR
ACCESSORIES.
2. Read and comply with all caution and safety-
related notes on or inside the receiver cabinet, on
the receiver chassis, or on the LCD module.
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this LCD
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 characteristics of this receiver and create a
hazard to the user. Any design alterations or
additions will void the manufacturer's warranty and
may make you, the servicer, responsible for
personal injury or property damage resulting
therefrom.
CURRENT
TESTER
+
EARTH
GROUND
_
2-1LTVP_ISP
Page 6
4. Hot Chassis Warning -
a. Some TV receiver chassis are electrically
connected directly to one conductor of the AC
power cord and maybe safety-serviced without
an isolation transformer only if the AC power
plug is inserted 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 chassis normally have 85V
AC(RMS) between chassis and earth ground
regardless of the AC plug polarity. This chassis
can be safety-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 not
isolated from the AC power line. The two
ground systems are electrically separated by
insulation material that must not be defeated or
altered.
5. 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
thermally hot parts, c. the AC supply, d. high
voltage, and, e. antenna wiring. Always inspect in
all areas for pinched, out of place, or frayed wiring.
Check AC power cord for damage.
6. 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 overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.
7. Product Safety Notice - Some electrical and
mechanical parts have special safety-related
characteristics which are often not evident from
visual inspection, nor can the protection they give
necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc..
Parts that have special safety characteristics are
identified by a ! on schematics and in parts lists.
Use of a substitute replacement that does not
have the same safety characteristics as the
recommended replacement part might create
shock, fire, and/or other hazards. The product's
safety is under review continuously and new
instructions are issued whenever appropriate.
Prior to shipment from the factory, our products
are strictly inspected to confirm they comply with
the recognized product safety and electrical codes
of the countries in which they are to be sold.
However, in order to maintain such compliance, it
is equally important to implement the following
precautions when a set is being serviced.
2-2LTVP_ISP
Page 7
Precautions during Servicing
A. Parts identified by the ! symbol are critical for
safety.
Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise
blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulators for transistors.
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before
soldering.
F.Observe that the wires do not contact heat
producing parts (heat sinks, oxide metal film
resistors, fusible resistors, etc.)
G. Check that replaced wires do not contact sharp
edged or pointed parts.
H. When a power cord has been replaced, check that
5~6 kg of force in any direction will not loosen it.
I.Also check areas surrounding repaired locations.
J. Use care that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
K. When connecting or disconnecting the internal
connectors, first, disconnect the AC plug from the
AC supply outlet.
L. When installing parts or assembling the cabinet
parts, be sure to use the proper screws and
tighten certainly.
2-3LTVP_ISP
Page 8
Safety Check after Servicing
Examine the area surrounding the repaired location
for damage or deterioration. Observe that screws,
parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance
with safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
AC Line VoltageClearance Distance (d), (d’)
220 to 240 V
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
≥3mm(d)
≥6 mm(d’)
2. Leakage Current Test
Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and
externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.).
Chassis or Secondary Conductor
Primary Circuit
d'd
Exposed Accessible Part
Z
AC Voltmeter
(High Impedance)
Fig. 1
Measuring Method : (Power ON)
Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across both terminals of load
Z. See Fig. 2 and following table.
Table 2: Leakage current ratings for selected areas
AC Line VoltageLoad ZLeakage Current (i)
2kΩ RES.
Connected in
parallel
220 to 240 V
50kΩ RES.
Connected in
parallel
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
i≤0.7mA AC Peak
i≤2mA DC
i≤0.7mA AC Peak
i≤2mA DC
One side of
B
Power Cord Plug Prongs
One side of power cord plug
prongs (B) to:
Antenna terminals
A/V Input, Output
Fig. 2
RF or
2-4LTVP_ISP
Page 9
STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is
indicated as shown.
Top View
Out
2. For other ICs, pin 1 and every fifth pin are
indicated as shown.
Pin 1
3. The 1st pin of every male connector is indicated as
shown.
Pin 1
Input
In
Bottom View
5
10
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
How to Remove / Install Flat Pack-IC
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. S-1-1)
Fig. S-1-1
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
CBA; 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. S-1-6)
4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
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. S-1-2)
3. The flat pack-IC on the CBA 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.
Hot-air
Flat Pack-IC
Desoldering
CBA
Masking
Tape
Tweezers
3-1TVP_SN
Machine
Flat Pack-IC
Fig. S-1-2
Page 10
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. S-1-3)
Flat Pack-IC
Desoldering Braid
Soldering Iron
Fig. S-1-3
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. S-1-4)
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. S-1-3)
2. Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.
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 CBA
contact pads as shown in Fig. S-1-5.
4. Bottom of the flat pack-IC is fixed with glue to the
CBA; 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. S-1-6)
5. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
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 CBA, handle it gently
because it may be damaged if force is applied.
Sharp
Pin
Fine Tip
Soldering Iron
3. Bottom of the flat pack-IC is fixed with glue to the
CBA; 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. S-1-6)
4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
Fig. S-1-4
To Solid
Mounting Point
CBA
Hot Air Blower
or
Iron Wire
Soldering Iron
Fig. S-1-5
Fine Tip
Soldering Iron
Flat Pack-IC
Tweezers
Fig. S-1-6
3-2TVP_SN
Page 11
2. Installation
1. Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.
2. The “●” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) 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. S-1-8.)
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. S-1-7
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.
1. Ground for Human Body
Be sure to wear a grounding band (1 MΩ) that is
properly grounded to remove any static electricity that
may be charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate
with proper grounding (1 MΩ) 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.
<Incorrect>
CBA
Presolder
Flat Pack-IC
Fig. S-1-8
<Correct>
1MΩ
CBA
Grounding Band
1MΩ
CBA
Conductive Sheet or
Copper Plate
3-3TVP_SN
Page 12
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart
This flowchart indicates the disassembly steps for the
cabinet parts, and the CBA 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.
[16] Speaker(s)
[13] IR Sensor CBA
[14] Function CBA
[3] Rear Cabinet
[5] Jack CBA
[6] Shield Box
[7] Digital Main
CBA Unit
[8] FFC Shield
[9] Shield(T)
[10] Main CBA
[4] Stand Hinge
[1] Stand Cover
[2] Neck Cover
Removal
Step/
Loc.
No.
Part
Remove/*Unhook/
Fig.
No.
Unlock/Release/
Unplug/Unclamp/
Desolder
2(S-6), (S-7), 3(S-8),
6(S-9), *CN101A,
[6]Shield Box
D2
*CN102A, *CN103A,
D3
*CN104A, *CN4501,
*CN4502
Digital Main
[7]
CBA UnitD2D3
2(S-10), Connector IC
Card OSU
[8]FFC ShieldD2 2(S-11)---
[9]Shield(T)D2 2(S-12), (S-13)---
4(S-14), (S-15),
D2
[10] Main CBA
Junction
[11]
CBA
Inverter
[12]
CBA
IR Sensor
[13]
CBA
*CN106, *CN105A,
D3
*CN802
D2
*CN404A---
D3
4(S-16), *CN401,
D2
*CN402, *CN403,
D3
*CN451
D2
(S-17), *CN301---
D3
Note
---
---
---
---
[11] Junction CBA
[12] Inverter CBA
[15] LCD Module
Assembly
[17] Front Cabinet
2. Disassembly Method
Removal
Step/
Loc.
Part
No.
Stand
[1]
Cover
[2]Neck Cover D1 ------------------
Rear
[3]
Cabinet
Stand
[4]
Hinge
[5]Jack CBA
Remove/*Unhook/
Fig.
No.
Unlock/Release/
Unplug/Unclamp/
Desolder
D1 2(S-1)---
D1 2(S-2), 3(S-3), 12(S-4)---
D1 ------------------
D2
2(S-5), *CN107---
D3
Note
[14]
Function
CBA
D2
------------------
D3
LCD
[15]
Module
D2 ------------------
Assembly
[16] Speaker(s)D2
Front
[17]
Cabinet
↓
(1)
↓
(2)
4(S-18),
Speaker Holder(s)
---
D2 ------------------
↓
(3)
↓
(4)
↓
(5)
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,
unlocked, released, unplugged, unclamped, or
desoldered.
P = Spring, L = Locking Tab, S = 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
Ta b le . "
4-1A8C72DC
Page 13
[3] Rear Cabinet
[4] Stand Hinge
(S-4)
(S-4)
[2] Neck Cover
[1] Stand Cover
(S-3)
(S-2)
(S-4)
(S-4)
(S-3)
(S-4)
(S-3)
(S-4)
(S-1)
Fig. D1
4-2A8C72DC
Page 14
[17] Front Cabinet
(S-9)
(S-9)
(S-10)
[7] Digital Main
CBA Unit
Connector IC
Card OSU
[6] Shield Box
Speaker
Holders
(S-17)
[13] IR Sensor
CBA
[14] Function CBA
[12] Inverter CBA
[16]
Speaker
(S-18)
(S-18)
Speaker
Holders
[16] Speaker
[15] LCD Module
Assembly
(S-18)
(S-16)
(S-16)
(S-6)
(S-7)
(S-14)
(S-15)
[11] Junction CBA
(S-8)
[5] Jack CBA
(S-14)
[10] Main CBA
(S-8)
(S-5)
(S-11)
[8] FFC
Shield
(S-12)
(S-13)
[9] Shield(T)
Fig. D2
4-3A8C72DC
Page 15
TV Cable Wiring Diagram
To LCD Module
Assembly
Inverter CBA
CN401
CN402
CN403
To Speaker
CN404B
CN451
CN106
CN105A
Junction
CBA
CN404A
Jack CBA
CL404
CN11
To LCD Module
Assembly
Digital Main CBA Unit
CN4501CN4502
CN3704CN4503CN3701CN3601
Main CBA
CN103ACN102ACN101ACN104A
CN107
CN201
CN202
Function
CBA
IR Sensor CBA
CN301
CN802
To Speaker
Fig. D3
4-4A8C72DC
Page 16
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: “CBA” 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.
Test Equipment Required
1. DC Voltmeter
2. Pattern Generato
3. Color Analyzer
How to make the Service remote
control unit:
Cut “A” portion of the attached remote control unit as
shown in Fig. 1.
service button
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 as shown in Fig.1.
A
Fig. 1
5-1A8C70EA
Page 17
1. Purity Check Mode
2. VCOM Adjustment.
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
[7] button
Green mode
[7] button
Blue mode
Test Point
Screen
Adj. Point
[P / ]
buttons
M. EQ.Spec.
Color analyzer
See below
Figure
It carries out in a darkroom.
Perpendicularity
L = 3 cm
Color Analyzer
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. [VCOM1]
Press [2] button on the service remote control unit.
[VCOM2]
Press [3] button on the service remote control unit.
5. Press [P / ] buttons on the service remote
control unit so that the color analyzer value
becomes minimum.
[7] button
White 25% mode
Note:
When entering this mode, the default setting is White mode.
5-2A8C70EA
Page 18
The following adjustment normally are not attempted in
the field. Only when replacing the LCD Panel then adjust
as a preparation.
3. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Tes t Po i nt
Screen
Adj. PointModeInput
[P / ]
buttons
[VIDEO]
C/D
M. EQ.Spec.
White Raster
(APL 70%)
or
(APL 25%)
5. [CUTOFF]
Press [3] button to select “COB” for Blue Cutoff
adjustment. Press [1] button to select “COR” for
Red Cutoff adjustment.
[DRIVE]
Press [6] button to select “DB” for Blue Drive
adjustment. Press [4] button to select “DR” for Red
Drive adjustment.
6. In each color mode, press [P / ] buttons to
adjust the values of color.
7. Adjust Cutoff and Drive so that the color
temperature becomes 12000°K (x
=
0.272 / y
=
0.278 ±0.005).
Pattern Generator,
Color analyzer
x= 0.272 ± 0.005
y= 0.278 ± 0.005
Figure
It carries out in a darkroom.
Perpendicularity
L = 3 cm
INPUT: WHITE 70%, 30%
Color Analyzer
1. Operate the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 30%=30IRE).
INPUT SIGNAL
30%=30IRE
70%=70IRE
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 [ -] button on the
service remote control unit and select “C/D” mode.
5-3A8C70EA
Page 19
HOW TO INITIALIZE THE LCD TELEVISION
How to initialize the LCD television:
1. Turn the power on.
2. To enter the service mode, press the service
button on the service remote control unit. (Refer to
page 5-1.)
- To cancel the service mode, Press [ ] button on
the remote control unit.
3. Press [] 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.
6-1A8CN0INT
Page 20
BLOCK DIAGRAMS
System Control Block Diagram
+3.3V
SENSOR
REMOTE
RS301
CN301
D303
LED144
REMOTE22
P-ON-H155
STANDBY
D302
POWER
IR SENSOR CBAFUNCTION CBAMAIN CBA
TO
INVERTER
BLOCK
DIAGRAM
PROTECT3
101211
CN105A
BACKLIGHT-SW
(CL404)
BACKLIGHT-ADJ
TO POWER
SUPPLY
BLOCK
DIAGRAM
RESET
PROTECT1
PROTECT2
MAIN CBA
CN202
KEY SWITCH
CN201
LED144
REMOTE22
P-ON-H155
KEY-IN166
CN106
TO POWER
P-ON-H1
CN104ACN3601
REMOTE224
CN101A
P-ON-H1125
P-ON-H21313
KEY-IN1251
CN3701
LED1188
SUPPLY
BLOCK
DIAGRAM
P-ON-H2
(SUB MICRO CONTROLLER)
IC4700
X3101
4MHz
OSC
6
XOUT
LED1
12
8
XIN
KEY-IN1
24
IC3102 (MEMORY)
P-ON-H1
P-ON-H2
14
13
SDA
5
20
SDA
REMOTE
11
R22
REMOTE
SCL
6
19
SCL
RXD
15
P22
TXD1
TXD
16
N22
RXD1
RESET-MAIN
5
V24
RESET-MAIN
TO DIGITAL
SIGNAL
PROCESS
BLOCK
DIAGRAM
VCOM-PWM
21
VCOM-PWM
AMP-MUTE-SUB
18
AA2
AMP-MUTE-MAIN
CN101ACN3701
PROTECT1215
22
PROTECT1
PROTECT2206
RESET179
3
23
RESET
PROTECT2
PROTECT3197
4
PROTECT3
TO AUDIO-2
BLOCK
DIAGRAM
AMP-MUTE
3
CN104ACN3601
BACKLIGHT-SW
A2
BACKLIGHT-SW
BACKLIGHT-ADJ
24223
AC24
BACKLIGHT-ADJ
IC4513
(MAIN MICRO CONTROLLER)
SDA
TO VIDEO
SCL
BLOCK
DIAGRAM
SCL
SCL
AF12
SDA
AE12
SDA
INPUT0
NICAM-RESET
SCART-MUTE
B2
A11
B11
Q3819
Q3823
INPUT0
NICAM-RESET
SCART-MUTE
INPUT1
TO AUDIO-1
BLOCK
DIAGRAM
INPUT2
INPUT1
E12
D12
Q3822
INPUT2
INPUT2
SLOW-SW1
TO VIDEO
SLOW-SW1E1FBIN1
D1
S-SW
FBIN1
BLOCK
DIAGRAM
7-1
S-SW
C12
CLKOUT
U25
25MHz
X3301
CLKIN
U26
OSC
DIGITAL MAIN CBA UNIT
SPI-CLK
SPI-DO
SPI-DI
SPI-CS
Y25
Y24
W25
W24
652
1
SI
CS
SO
SCK
IC3706 (MEMORY)
A8C72BLS
Page 21
Video Block Diagram
TO DIGITAL
SIGNAL
PROCESS
BLOCK
DIAGRAM
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
TO DIGITAL
SIGNAL
PROCESS
BLOCK
DIAGRAM
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
TO DIGITAL
SIGNAL
PROCESS
BLOCK
DIAGRAM
AUDIO SIGNAL
TS-DATA
VIDEO SIGNAL
IC3824 (DEMODULATOR)
58
DIF-OUT1204
CN103ACN3704
SCL
13
MPEG2-TS
INTERFACES
DEMODULATOR
57
IF-AGC186
DIF-OUT2222
25
SCL
SCL
64
SCL159
SDA
26
SDA
SDA2IF-AGC
63
SDA168
TU-CVBS1113
VIDEO
CN102ACN4503
WF7WF6WF5
VIDEO-B
VIDEO-R
VIDEO-G
TU-CVBS
DTV-CVBS
VIDEO-R323
VIDEO-B521
VIDEO-G422
VIDEO125
TU-VIDEO1313
SLOW-SW1233
5
3
IC3823
(INPUT SELECT)
4
FBIN1224
WF4
SW CTL
10911
INPUT2
SLOW-SW1
FBIN1
S-SW
CN3704
S-SW123
INPUT2618
CN103A
WF3WF2
S-VIDEO-Y
S-VIDEO-C
S-VIDEO-Y233
S-VIDEO-C251
CN101ACN3701
COMP-Y
COMP-Pb
COMP-Pb206
COMP-Y188
COMP-Pr
COMP-Pr215
15
DIF-OUT1
TU501
(TUNER UNIT)
8
16
17
SCL
IF-AGC
DIF-OUT2
BUFFER
Q505
6
9SDA
VIDEO-OUT
15
IC851
(INPUT SELECT)
2
JK722
VIDEO-IN
1
SW CTL
MAIN CBADIGITAL MAIN CBA UNIT
10911
CN107CN11
COMP-Y11
COMP-Pb22
COMP-Pr44
JACK CBA
JK11
JK12
JK13
COMPONENT
-Y-IN
COMPONENT
-Pb-IN
COMPONENT
-Pr-IN
JK751
15
20VIDEO-IN
VIDEO-R
7
11
VIDEO-B
VIDEO-G
BUFFERBUFFER
Q726Q744
19
VIDEO-OUT
Q734
8
SLOW-SW
Q731
16
RAPID-SW
CY
JK721
S-VIDEO-IN
7-2
A8C72BLV
Page 22
Audio-1 Block Diagram
TO
DIGITAL
SIGNAL
PROCESS
BLOCK
DIAGRAM
AUDIO SIGNAL
ACLK
BCLK
LRCLK
AD ATA 1
AUX-ADATA
TO SYSTEM
CONTROL
INPUT0
INPUT1
BLOCK
DIAGRAM
INPUT2
BUFFER
Q3831
BUFFER
Q3832
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
SCART-MUTE
IC3825
(AUDIO A/D CONVERTER)
111015
12
A/D
CONVERTER
(L-CH)
(R-CH)
1
2
CN3704CN103A
AUDIO(L)321
AUDIO(R)420
INPUT0816
IC3822
(AUDIO D/A CONVERTER)
INPUT2618
INPUT1717
IC850
(INPUT SELECT)
124
3
8
(L-CH)
15
5
7
D/A
6
CONVERTER
(R-CH)
14
(L-CH)
5
IC3823
CN4503CN102A
TU-AUDIO(L)1016
TU-AUDIO(R)1115
13
Q3833
15
(INPUT SELECT)
1
2
Q3834
14
I2C BUS
I/F
RESET
19
18
21
SCL
NICAM-RESET
DIGITAL MAIN CBA UNIT
10911
SW CTL
13
12
24
22
(L-CH)
(R-CH)
AUDIO SIGNAL
PROCESS
IC3821 (SOUND PROCESSOR)
3
SDA
MAIN CBA
9 10
SW CTL
(R-CH)
12
11
15
14
CN3704CN103A
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
CN107CN11
COMP-AUDIO(L)
COMP-AUDIO(R)
66
77
JK15
JK14
COMPONENT
AUDIO(L)-IN
JACK CBA
COMPONENT
AUDIO(R)-IN
4
IC851
(INPUT SELECT)
5
JK723
AUDIO(L)-IN
3
(L-CH)
JK724
14
(R-CH)
12
13
AUDIO(R)-IN
SW CTL
7-3
SIF915
10911
4
JK751
2
6AUDIO(L)-IN
AUDIO(R)-IN
3
1
AUDIO(L)-OUT
AUDIO(R)-OUT
JK725
PC-AUDIO
-IN
SIF-OUT
TU501
(TUNER UNIT)
A8C72BLA1
Page 23
Audio-2 Block Diagram
SP802
SPEAKER
L-CH
2
JK801
HEADPHONE
JACK
CL451
SP451
SPEAKER
R-CH
2
AUDIO SIGNAL
SP(L) 1
CN802CL802
IC801 (AUDIO AMP)
SP-GND
11
AMP
(L-CH)
6
VOLUME
MUTE
/STANDBY
SP(R) 1
CN451
SP-GND
INVERTER CBA
CN404B
WF1
14
AMP
7
2
CONTROL
(R-CH)
1
+9V
SP(R)1313SP(R)1313
CN404ACN105A
CL404
JUNCTION
CBA
IC802
(AUDIO D/A CONVERTER)
(L-CH)
8
CN101ACN3701
LRCLK1115
LRCLK
TO
DIGITAL
15
D/A
CONVERTER
BCLK1214
BCLK
AD ATA
SIGNAL
PROCESS
(R-CH)
AD ATA1313
14
567
ACLK1412
AMP-MUTE917
ACLK
BLOCK
DIAGRAM
AMP-MUTE
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
AMP MUTE
Q805
SWITCHING
Q802
MAIN CBA
DIGITAL MAIN CBA UNIT
7-4
A8C72BLA2
Page 24
Digital Signal Process Block Diagram
LCD MODULE
ASSEMBLY
BRSB2(+)52
CN4501
AUDIO SIGNAL
757473727170666564
VIDEO SIGNAL
IC4201(LCD DRIVE)
BRSB2(-)51
BRSB1(+)50
BRSB1(-)49
BRSB0(+)48
BRSB0(-)47
BRSG2(+)46
BRSG2(-)45
BRSG1(+)44
BRSG1(-)43
BRSG0(+)42
BRSG0(-)41
BRSR2(+)17
63
62616059585756556968777881
D-RSDS
OUTPUT
LVDS
RX
242522232021161718
AF20
AE20
AD19
AD20
AE19
AF19
AF18
AE18
BRSR2(-)16
AE21
BRSR1(+)15
19
AF21
BRSR1(-)14
BRSR0(+)13
BRSR0(-)12
BRSCLK(+)22
VCOM7
BRSCLK(-)21
TP119
POL18
STV5
LVDS
FRSB2(+)53
FRSB2(-)52
FRSB1(+)51
FRSB1(-)50
FRSB0(+)49
FRSB0(-)48
FRSG2(+)47
FRSG2(-)46
FRSG1(+)45
VCOM9
CN4502
52515049484744434140393837363534333246
DATA
MAPPING
TX
FRSG1(-)44
D-RSDS
LVDS
9107856123
AF25
AF24
AE25
AD25
AD26
FRSG0(+)43
FRSG0(-)42
OUTPUT
RX
AE24
AD23
FRSR2(+)18
AD24
FRSR2(-)17
AF26
FRSR1(+)16
4
AE26
FRSR1(-)15
FRSR0(+)14
FRSR0(-)13
FRSCLK(+)23
FRSCLK(-)22
STH-F55
CPV6
OE15
STV7
TP120
POL19
DRIVE
IC4511,Q4511,
145
808284
IC4202 (MEMORY)
SCL
87
6
SCL
(SDRAM)
IC3201
SDA
88
5
SDA
Q4512,Q4513
TO SYSTEM
DATA(0-15)
H1,H3,H7,H9
B1,B9,C2,C8,
F1,F9,G2,G8,
M2,M3,M7,M8,
D1,D3,D7,D9,
A13-15,A18,
A21-23,B13-15,
B17,B19-23
C15,C17-19,
VCOM-PWM
CONTROL
BLOCK
DIAGRAM
ADDESS(0-12)
N2,N3,N7,N8,
P2,P3,P7,P8,R2
C23,C24,D14,
D15,D17-19,
D22,D23
IC4513 (DIGITAL SIGNAL PROCESS)
DIGITAL MAIN CBA UNIT
T4
Y3
COMP-Y
TU-CVBS
T3
U4
COMP-Pr
COMP-Pb
U3
W3
VIDEO
S-VIDEO-Y
TO VIDEO
BLOCK
DIAGRAM
A/D
CONVERTER
SW
V3V4Y2
S-VIDEO-C
VIDEO-R
Y1
AA1
VIDEO-G
VIDEO-B
JK3701
T5
1
RED
R4R3R5
3
2
BLUE
GREEN
VGA-HSYNC
K5
14
13
VSYNC
HSYNC
D-SUB
VGA-VSYNC
L5
SDA
IC3701 (MEMORY)
5
12
15
DATA
CLOCK
AB25
SCL
6
TS I/F
AB12
TS-DATA
DTV-CVBS
TO VIDEO
BLOCK
DIAGRAM
DIGITAL
SIGNAL
PROCESS
AUDIO I/F
AF15
AE15
AE16
AC17
AD15
AUX-ADATA
BCLK
AD ATA 1
TO AUDIO-1
LRCLK
BLOCK
DIAGRAM
ACLK
AD ATA
AD16
BCLK
LRCLK
TO AUDIO-2
BLOCK
ACLK
DIAGRAM
TMDS-D0(+)
JK4001
AUDIO
DECODER
A9
B9
C8
C9
TMDS-D0(-)
TMDS-D1(+)
TMDS-D1(-)
79461
HDMI
I/F
B8
A8
B10
TMDS-CLOCK(+)
TMDS-CLOCK(-)
TMDS-D2(+)
TMDS-D2(-)
3
101216
HDMI-IN1
VIDEO
DECODER
E9
A10
Q4002
BUFFER
SDA
SCL
C10
Q4001
BUFFER
15
Y22,Y23,AA21-23,
AB21-23,AF7-11,
AE9,AE10,AD10
D(0-7)
3,4,7,8,
13,14,
(LATCH)
LATCH
IC3826
2,5,6,
D(0-15)
9,12,15
A(8-13)
CI
CARD
17,18
SLOT
V21,W21,Y21,
AA20,AC20,AC21
AE14,AF14
A(0-7)
A(0-13)
7-5
A8C72BLD
Page 25
Inverter Block Diagram
BACK
LIGHT
1
2
CN401
786
5
BACK
1
CN402
LIGHT
2
786
BACK
LIGHT
LCD MODULE
ASSEMBLY
1
2
CN403
5
786
5
T401
Q405
SW+16V
Q401,Q415Q417,Q429
3
2
CURRENT
CONTROL
SWITCH
IC401
(PWM CONTROL)
1
VCC
12
T402
Q416
Q410,
Q413
Q412
15
3
2
CURRENT
CONTROL
DRIVE
SWITCHING
8
PWM
CONTROL
16
1
SWITCH
Q404,
Q406
Q407
LOGIC
2
4
3
4
DRIVE
SWITCHING
11
1
T403
OSC
Q424
2
3
CURRENT
CONTROL
5 6
1
SWITCH
Q421
Q420
4
Q422
OVER VOLTAGE
PROTECTOR
OVER VOLTAGE
PROTECTOR
OVER VOLTAGE
PROTECTOR
OVER VOLTAGE
PROTECTOR
OVER VOLTAGE
PROTECTOR
OVER VOLTAGE
Q427
Q414
Q419
Q403
Q409
PROTECTOR
INVERTER CBA
Q428
F401
3.15A
CN404B
CL404 CN404A
TO POWER
SUPPLY
2,5,6
INV+22V
2,5,6
2,5,6
INV+22V
BLOCK
DIAGRAM
(CN105A)
SW+22V
Q423,
Q425
SW
CN404B
12
11
10
BACKLIGHT-ADJ
BACKLIGHT-SW
PROTECT3
12
11
10
JUNCTION
CBA
A8C72BLINV
7-6
CL404 CN404A
11
BACKLIGHT-SW12BACKLIGHT-ADJ
TO SYSTEM
CONTROL
BLOCK
10PROTECT3
DIAGRAM
(CN105A)
Page 26
Power Supply Block Diagram
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
LCD+24.5V
LCD-6.8V
LCD+13V
TO
INVERTER
BLOCK
DIAGRAM
(CL404)
18
16
19-21
P-ON+3.3V
+3.5V(1)
LCD+3.3V
14
7,8
9-11
+3.5V(2)
2-4
AL+3.3V
P-ON+5V
24,25
P-ON+9V
12
DIGITAL MAIN CBA UNIT
AL+3.3V
P-ON+9V
P-ON+5V
AL+12V
P-ON+3.3V
PROTECT-1
TO SYSTEM
CONTROL
P-ON-H1
PROTECT-2
BLOCK
DIAGRAM
RESET
P-ON-H2
INV+22V
2,5,6
CN105A
SW+25V
Q911,Q912
LCD+24.5V8
LCD-6.8V10
CN104ACN3601
Q922,D936
SW+3.3V
Q902,D920
+5V REG.
IC900
LCD+13V5-7
P-ON+3.3V
15-17
SW+13V
+3.3V REG.
IC902
LCD+3.3V12
+3.5V(1)
18,19
1 2 4
+3.5V(2)
22-24
CN101ACN3701
Q901,D916
AL+3.3V323P-ON+5V1,2
CN102ACN4503
+3.3V REG.
P-ON+9V14
+5V REG.
Q936,D985
+9V REG.
Q906,D926
Q908
SW-6.8V
Q903
Q907
Q904
Q920
MAIN CBA
RESET
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
HOT CIRCUIT. BE CAREFUL.
T601
HOTCOLD
D611,D613,
D614,D616
L601
F601
T4A H 250V
AC601
AC CORD
16
3
BRIDGE
RECTIFIER
LINE
FILTER
Q900
FEED
11
12
10
15
1
SWITCHING
Q600
5
Q601
SWITCHING
14
CONTROL
9
13
6
14
IC601
7-7
BACK
32
A8C72BLP
Page 27
SCHEMATIC DIAGRAMS / CBA AND TEST POINTS
Standard Notes
WARNING
Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using
replacement components rated for higher voltage,
wattage, etc. Replacement parts that have these
special safety characteristics are identified in this
manual and its supplements; electrical components
having such features are identified by the mark “!” in
the schematic diagram and the parts list. Before
replacing any of these components, read the parts list
in this manual carefully. The use of substitute
replacement parts that do not have the same safety
characteristics as specified in the parts list may create
shock, fire, or other hazards.
Notes:
1. Do not use the part number shown on these
drawings for ordering. The correct part number is
shown in the parts list, and may be slightly
different or amended since these drawings were
prepared.
2. All resistance values are indicated in ohms
(K = 10
3. Resistor wattages are 1/4W or 1/6W unless
otherwise specified.
4. All capacitance values are indicated in µF
(P = 10
5. All voltages are DC voltages unless otherwise
specified.
3
, M = 106).
-6
µF).
8-1LC6P_SC
Page 28
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON
THE FOLLOWING PAGES:
1. CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE
FUSE.
2. CAUTION:
Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not
defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components
in the power supply circuit to fail.
3. Note:
1. Do not use the part number shown on the drawings for ordering. The correct part number is shown in the
parts list, and may be slightly different or amended since the drawings were prepared.
2. To maintain original function and reliability of repaired units, use only original replacement parts which are
listed with their part numbers in the parts list section of the service manual.
4. Voltage indications on the schematics are as shown below:
Plug the TV power cord into a standard AC outlet.:
2
(Unit: Volt)
1
5.05.0
3
Power on mode
5. How to read converged lines
1-D3
Distinction Area
Line Number
(1 to 3 digits)
Examples:
1. "1-D3" means that line number "1" goes to the line number
"1" of the area "D3".
2. "1-B1" means that line number "1" goes to the line number
"1" of the area "B1".
6. Test Point Information
: Indicates a test point with a jumper wire across a hole in the PCB.
: Used to indicate a test point with a component lead on foil side.
: Used to indicate a test point with no test pin.
: Used to indicate a test point with a test pin.
Voltage
Indicates that the voltage
is not consistent here.
3
2
1
AREA D3
1-B1
AREA B1
1-D3
ABCD
8-2LC6P_SC
Page 29
Main 1/3 Schematic Diagram
8-3
A8C72SCM1
Page 30
Main 2/3, Jack Schematic Diagram
8-4
A8C72SCM2
Page 31
Main 3/3 Schematic Diagram
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
8-5A8C72SCM3
Page 32
Inverter & Junction Schematic Diagram
8-6
A8C72SCINV
Page 33
Function Schematic Diagram
8-7
A8C72SCF
Page 34
IR Sensor Schematic Diagram
8-8
A8C72SCIR
Page 35
Digital Main 1/6 Schematic Diagram
1 NOTE:
The order of pins shown in this diagram is different from that of actual IC4513.
IC4513 is divided into seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section.
8-9
A8C72SCD1
Page 36
Digital Main 2/6 Schematic Diagram
1 NOTE:
The order of pins shown in this diagram is different from that of actual IC4513.
IC4513 is divided into seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section.
8-10
A8C72SCD2
Page 37
Digital Main 3/6 Schematic Diagram
1 NOTE:
The order of pins shown in this diagram is different from that of actual IC4513.
IC4513 is divided into seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section.
8-11
A8C72SCD3
Page 38
Digital Main 4/6 Schematic Diagram
1 NOTE:
The order of pins shown in this diagram is different from that of actual IC4513.
IC4513 is divided into seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section.
8-12
A8C72SCD4
Page 39
Digital Main 5/6 Schematic Diagram
8-13
A8C72SCD5
Page 40
Digital Main 6/6 Schematic Diagram
1 NOTE:
The order of pins shown in this diagram is different from that of actual IC4513.
IC4513 is divided into seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section.
8-14
A8C72SCD6
Page 41
Main CBA Top View
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
Because a hot chassis ground is present in the power
supply circut, an isolation transformer must be used.
Also, in order to have the ability to increase the input
slowly, when troubleshooting this type power supply
circuit, a variable isolation transformer is required.
8-15
BA8C72F01012-1
Page 42
Main CBA Bottom View
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
WF1
PIN14 OF
IC801
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
WF4
PIN5 OF
CN102A
WF6
PIN3 OF
CN102A
WF7
PIN1 OF
CN102A
WF5
PIN4 OF
CN102A
WF3
PIN25 OF
CN101A
PIN23 OF
CN101A
Because a hot chassis ground is present in the power
supply circut, an isolation transformer must be used.
Also, in order to have the ability to increase the input
slowly, when troubleshooting this type power supply
circuit, a variable isolation transformer is required.
WF2
8-16
BA8C72F01012-1
Page 43
Inverter CBA Top View
8-17
BA8A70F01021-1
Page 44
Inverter CBA Bottom View
8-18
BA8A70F01021-1
Page 45
IR Sensor CBA Top ViewFunction CBA Top View
Function CBA Bottom View
BA8C72F01012-2
IR Sensor CBA Bottom View
BA8C72F01012-3
8-19
Page 46
Jack CBA Top View
Junction CBA Top & Bottom View
Jack CBA Bottom View
BA8A70F01021
BA8C72F01012-4
8-20
Page 47
WAVEFORMS
WF1 ~ WF7 = Waveforms to be observed at
Waveform check points.
(Shown in Schematic Diagram.)
Input: PAL Color Bar Signal (with 1kHz Audio Signal)
! have special characteristics important to safety.
Before replacing any of these components, read
carefully the product safety notice in this service
manual. Don't degrade the safety of the product
through improper servicing.
NOTE: Parts that are not assigned part numbers
(---------) are not available.
Comparison Chart of Models and Marks
ModelMark
LT6-M22BBA
LT6-M22WBB
Ref. No. MarkDescriptionPart No.
A1AFRONT CABINET A8C70EP1EM022865A
A1BFRONT CABINET A8C71EP1EM023145A
A4AREAR CABINET A8C72EP1EM023147B
A4BREAR CABINET A8C73EP1EM023265B
A5ADECORATION PLATE A8A70UH1EM222263
A5BDECORATION PLATE A8C71EP1EM222643
A7AFUNCTION KNOB A8CN0FP1EM222143A
A7BFUNCTION KNOB A8CN3FP1EM324537A
A9ASTAND COVER A8CN0FP1EM022467
A9BSTAND COVER A8CN3FP1EM222443
A10AREAR COVER A73F0EP1EM322722
A10BREAR COVER A8C71EP1EM325157A
A11SENSOR LED LENS A8CN0FP1EM323959
A12STAND RUBBER FOOT A8AN0UH1EM426377
A24ANECK COVER A8A70UH1EM325318
A24BNECK COVER A8C71EP1EM325159
B1SPEAKER HOLDER A7120UH1EM423986
B3WALL MOUNT BRACKET A84N0UH1EM323797
B8SHIELD BOX A8CN0FP1EM122473
B9SHIELD (T) A8CN6EP1EM325219
B10FFC SHIELD A8CN6EP1EM427320
B15STAND HINGE A8C70EP1EM325037
B29CLOTH(10X30XT0.5) B5900UA0EM404486
B32CLOTH(15X40XT0.5) A7140UH1EM424366
B36GASKET A8AF0UH1EM425861
B47CLOTH(10X40XT1) A8A70UH1EM427377
CL107WIRE ASSEMBLY 7PIN WX1A8CN0-012 WX1A8CN0-012
CL451WIRE ASSEMBLY 2PIN WX1A8C70-002 WX1A8C70-002
CL802WIRE ASSEMBLY 2PIN WX1A8C70-002 WX1A8C70-002
CL3601WIRE ASSEMBLY 25PIN WX1A8CN0-
CL3701WIRE ASSEMBLY 25PIN WX1A8CN0-
CL3704WIRE ASSEMBLY 23PIN WX1A8CN0-
CL4501WIRE ASSEMBLY FFC 55PIN FFC WIRE/
CL4502WIRE ASSEMBLY FFC 55PIN FFC WIRE/
CL4503FFC WIRE 25PIN WX1A8C70-005WX1A8C70-005
CN3802CONNECTOR IC CARD OSU SLOT
L2SCREW P-TIGHT M3X8 BIND HEAD+GBJP3080
L10SCREW S-TIGHT M3X6 BIND HEAD+GBJS3060
L17DOUBLE SEMS SCREW M4X9 + BLACK
L28HEX SCREW #4-40 7MM1EM422042
L29DOUBLE SEMS SCREW M2X10+
L30SCREW P-TIGHT M3X10 BIND HEAD+ GBJP3100
006
006
005
55PIN/42MM
55PIN/42MM
2013858-1
L0130UA
M2X10
WX1A8CN0-006
WX1A8CN0-006
WX1A8CN0-005
WX1A8A70-101
WX1A8A70-101
J620680AP001
0EM408146A
FPJ32100
Ref. No. MarkDescriptionPart No.
L36DOUBLE SEMS SCREW M2X6+ M2X6FPJ32060
LCD1LCD MODULE 22INCH WIDE CMO
SP451SPEAKER S0407F10 orDSD0807XQ002
SP802SPEAKER S0407F10 orDSD0807XQ002
22INCH WSXGA+
SPEAKER MAGNETIC YDP47-1FNDSD0807EFU01
SPEAKER MAGNETIC YDP47-1FNDSD0807EFU01
UG220EA
PACKING
S4SET BAG A81N0UH1EM322872A
S6STAND BAG A81N0UH1EM424597
ACCESSORIES
X3AREMOTE CONTROL NF028RD 170/
X3BREMOTE CONTROL NF031RD 170/
Ref. No. MarkDescriptionPart No.
A6!ARATING LABEL A8C72EP----------
A6!BRATING LABEL A8C73EP----------
A21POP LABEL A8CN1EP----------
A27CARD LABEL A8CN0FP----------
B35WASHER(D12) A8C70EP1EM427237
B43RUBBER CUSHION (10X15X10)
L4SCREW P-TIGHT 3X12 BIND HEAD+
L10SCREW S-TIGHT M3X6 BIND HEAD+GBJS3060
L11SCREW S-TIGHT M3X8 BIND HEAD+GBHS3080
L17DOUBLE SEMS SCREW M4X9 + BLACK
L30SCREW P-TIGHT M3X10 BIND HEAD+ GBJP3100
L32SCREW P-TIGHT D4X10 BIND HEAD+GBJP4100
ECPLC6.501/NF028
ECPLC6.501/NF031
A71F3UH
BLK
L0130UA
NF028RD
NF031RD
1EM424529
GBHP3120
0EM408146A
PACKING
S1ACARTON A8C70EP1EM325099A
S1BCARTON A8C71EP1EM427439A
S2STYROFOAM TOP A8C70EP1EM022885A
S3STYROFOAM BOTTOM A8C70EP1EM022886A
S5SERIAL NO. LABEL L9750UA----------
ACCESSORIES
X1BAG POLYETHYLENE 235X365XT0.030EM408420A
X4BATTERY R6DB/2PAXB0M601MS003
X2-1!OWNERS MANUAL(DE-6) DE IT EL SV
X2-2!OWNERS MANUAL(FR-6) FR ES PT IT
X2-3!OWNERS MANUAL(PL-6) PL DE HU RO
!OWNER'S MANUAL(AR)1EMN23926
!OWNER'S MANUAL(BG)1EMN23927
!OWNER'S MANUAL(EN)1EMN23928
!OWNER'S MANUAL(RU)1EMN23929
!OWNER'S MANUAL(UA)1EMN23930
FR EN
DE NL
CS SK
1EMN23923
1EMN23924
1EMN23925
2008102012-1A8C72/73CA
Page 52
ELECTRICAL PARTS LIST
PRODUCT SAFETY NOTE: Products marked with a
! have special characteristics important to safety.
Before replacing any of these components, read
carefully the product safety notice in this service
manual. Don't degrade the safety of the product
through improper servicing.
NOTES:
1. Parts that are not assigned part numbers (---------)
are not available.
2. Tolerance of Capacitors and Resistors are noted
with the following symbols.
C.....±0.25%D.....±0.5%F.....±1%
G.....±2%J......±5%K.....±10%
M.....±20%N.....±30%Z.....+80/-20%
Comparison Chart of Models and Marks
ModelMark
LT6-M22BBA
LT6-M22WBB
DIGITAL MAIN CBA UNIT
Ref. No.DescriptionPart No.
DIGITAL MAIN CBA UNIT1ESA19428
MMA CBA
Ref. No. MarkDescriptionPart No.
ABMMA CBA
MMA CBA
Consists of the following:
MAIN CBA
FUNCTION CBA
IR SENSOR CBA
JACK CBA
MAIN CBA
Ref. No. MarkDescriptionPart No.
MAIN CBA
Consists of the following:
CAPACITORS
C102CHIP CERAMIC CAP.(1608) CH J
C103CHIP CERAMIC CAP.(1608) CH J
C104CHIP CERAMIC CAP.(1608) F Z 0.1µF/
C105CHIP CERAMIC CAP.(1608) F Z 0.1µF/
C508CHIP CERAMIC CAP.(1608) B K 0.01µF/
C510ELECTROLYTIC CAP. 100µF/10V MCE1AMASDL101
C512CHIP CERAMIC CAP.(1608) CH J 47pF/
C513CHIP CERAMIC CAP.(1608) CH J 100pF/
C516CHIP CERAMIC CAP.(1608) CH J 100pF/
C517CHIP CERAMIC CAP.(1608) CH J 100pF/
C518ELECTROLYTIC CAP. 1000µF/10V MCE1AMASDL102
C519CHIP CERAMIC CAP.(1608) F Z 0.1µF/
C520CHIP CERAMIC CAP.(1608) CH J 47pF/
1000pF/50V
1000pF/50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
1ESA18405
1ESA18486
----------
----------
----------
----------
----------
CHD1JJ3CH102
CHD1JJ3CH102
CHD1JZ30F104
CHD1JZ30F104
CHD1JK30B103
CHD1JJ3CH470
CHD1JJ3CH101
CHD1JJ3CH101
CHD1JJ3CH101
CHD1JZ30F104
CHD1JJ3CH470
Ref. No. MarkDescriptionPart No.
C524ELECTROLYTIC CAP. 33µF/16V M H7CE1CMAVSL330
C525CHIP CERAMIC CAP.(1608) F Z 0.1µF/
C600!METALIZED FILM CAP. 0.22µF/250V orCT2E224MS037
!CAP METALIZED FILM 0.22µF/300V K
C601!METALIZED FILM CAP. 0.1µF/250V orCT2E104MS037
!CAP METALIZED FILM 0.1µF/300V K
C615!CAP ELECTROLYTIC 180µF/400V MCA2H181DYG10
C621CERAMIC CAP. 470pF/2KV orCA3D471PAN04
C623POLYESTER FILM CAP. (PB FREE)
C624POLYESTER FILM CAP. (PB FREE)
C625POLYESTER FILM CAP. (PB FREE)
C630!SAFTY CAP. 1000pF/250V KX orCA2E102MR101
!SAFETY CAP. 1000pF/250V KX orCA2E102MR050
!CAP CERAMIC 1000pF/250V/MCA2E102MR086
C642!SAFETY CAP. 2200pF/250V KX orCA2E222MR050
!SAFTY CAP. 2200pF/250V KX orCA2E222MR101
!CAP CERAMIC 2200pF/250V/MCA2E222MR086
C702CHIP CERAMIC CAP.(1608) CH J 100pF/
C703ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C707CHIP CERAMIC CAP.(1608) CH J
C710CHIP CERAMIC CAP.(1608) CH J 100pF/
C711ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C712CHIP CERAMIC CAP.(1608) B K 5600pF/
C714CHIP CERAMIC CAP.(1608) B K 5600pF/
C716CHIP CERAMIC CAP.(1608) B K 5600pF/
C718CHIP CERAMIC CAP.(1608) B K 5600pF/
C720CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C721CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C722CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C723CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C731CHIP CERAMIC CAP.(1608) B K 5600pF/
C732CHIP CERAMIC CAP.(1608) B K 5600pF/
C733CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C734CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C741CHIP CERAMIC CAP. B K 2200pF/50VCHD1JK30B222
C742ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C744CHIP CERAMIC CAP. B K 2200pF/50VCHD1JK30B222
C745ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C747CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C751ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C753ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C756ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C758ELECTROLYTIC CAP. 47µF/16V M H7CE1CMAVSL470
C788ELECTROLYTIC CAP. 100µF/16V MCE1CMASDL101
C789ELECTROLYTIC CAP. 330µF/6.3V M H7 CE0KMAVSL331
C791CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C792CHIP CERAMIC CAP.(1608) CH J 100pF/
C793CHIP CERAMIC CAP.(1608) CH J 100pF/
C794CHIP CERAMIC CAP.(1608) CH J 100pF/
50V
3.5MM
3.5MM
CERAMIC CAP. BL 470pF/2KVCA3D471XF003
0.01µF/100V J or
CAP POLYESTER FILM 0.01µF/100V JCA2A103SER02
0.0015µF/100V J or
CAP POLYESTER FILM 0.0015µF/100V J CA2A152SER02
0.068µF/100V J or
CAP POLYESTER FILM 0.068µF/100V J CA2A683SER02
C810CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C811ELECTROLYTIC CAP. 330µF/16V MCE1CMASDL331
C812CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C816ELECTROLYTIC CAP. 22µF/50V MCE1JMASDL220
C818ELECTROLYTIC CAP. 470µF/16V MCE1CMASDL471
C819CHIP CERAMIC CAP. B K 3900pF/50VCHD1JK30B392
C820CHIP CERAMIC CAP. B K 3900pF/50VCHD1JK30B392
C822ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C823CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C824CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C825CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C826CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C827CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C828CHIP CERAMIC CAP.(1608) B K 0.1µF/
C835CHIP CERAMIC CAP.(1608) CH J
C836CHIP CERAMIC CAP.(1608) CH J
C837CHIP CERAMIC CAP.(1608) F Z 0.1µF/
C883CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C884CHIP CERAMIC CAP.(1608) B K 1µF/10V CHD1AK30B105
C892CHIP CERAMIC CAP.(1608) CH J
C894CHIP CERAMIC CAP.(1608) CH J
C895CHIP CERAMIC CAP.(1608) CH J 100pF/
C900ELECTROLYTIC CAP 3300µF/10V orCE1AMZNDL332
C901ELECTROLYTIC CAP. 2.2µF/50V MCE1JMASDL2R2
C902ELECTROLYTIC CAP 3300µF/25V M orCE1EMZPDL332
C403ELECTROLYTIC CAP. 470µF/25V MCE1EMASDL471
C404CHIP CERAMIC CAP.(1608) B K 0.1µF/50VCHD1JK30B104
1ESA18650
----------
----------
----------
2008102013-8A8C72/73EL
Page 60
Ref. No.DescriptionPart No.
C405ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C406CAP CERAMIC (AX) 0.1µF/50V/F/ZCA1J104TU062
C408CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C409CHIP CERAMIC CAP.(1608) B K 0.1µF/50VCHD1JK30B104
C410ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C411CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C413CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C414CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C415ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C416CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C418CAP CERAMIC HV SL D 15pF/3KV orCCD3FJPSL150
CAP CERAMIC HV 15pF/3.15KV/SL/JCCD3FJASL150
C420ELECTROLYTIC CAP. 470µF/25V MCE1EMASDL471
C421CAP CERAMIC HV SL D 15pF/3KV orCCD3FJPSL150
CAP CERAMIC HV 15pF/3.15KV/SL/JCCD3FJASL150
C422CAP CERAMIC (AX) 0.1µF/50V/F/ZCA1J104TU062
C423CAP CERAMIC (AX) 0.1µF/50V/F/ZCA1J104TU062
C424CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C425CHIP CERAMIC CAP.(1608) B K 0.1µF/50VCHD1JK30B104
C426ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C427CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C428CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C429CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C430CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C431ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C432CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C433POLYESTER FILM CAP. (PB FREE) 0.01µF/
C434CAP CERAMIC HV SL D 15pF/3KV orCCD3FJPSL150
C435CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C436ELECTROLYTIC CAP. 470µF/25V MCE1EMASDL471
C437CAP CERAMIC HV SL D 15pF/3KV orCCD3FJPSL150
C438ELECTROLYTIC CAP. 22µF/50V MCE1JMASDL220
C439CHIP CERAMIC CAP.(1608) B K 0.1µF/50VCHD1JK30B104
C440ELECTROLYTIC CAP. 2.2µF/50V MCE1JMASDL2R2
C441CAP CERAMIC (AX) 0.1µF/50V/B/KCA1J104TU061
C443CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C444ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C445CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C446CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C447ELECTROLYTIC CAP. 10µF/50V MCE1JMASDL100
C448CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C449CAP CERAMIC HV SL D 15pF/3KV orCCD3FJPSL150
C450CHIP CERAMIC CAP.(1608) B K 1µF/25VCHD1EK30B105
C452CHIP CERAMIC CAP.(1608) B K 0.1µF/50VCHD1JK30B104
C453ELECTROLYTIC CAP. 100µF/25V MCE1EMASDL101
C455CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C456CHIP CERAMIC CAP.(1608) B K 0.01µF/50VCHD1JK30B103
C457POLYESTER FILM CAP. (PB FREE) 0.01µF/
C458ZENER DIODE MTZJT-773.9BQDTB0MTZJ3R9
C459CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C460CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C461CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C462CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C463CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C464CERAMIC CAP. B K 220pF/500VCCD2JKS0B221
C465CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
C466CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
C467CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
C468CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
C469CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
C470CHIP CERAMIC CAP.(1608) B K 0.022µF/50VCHD1JK30B223
100V J or
CAP POLYESTER FILM 0.01µF/100V JCA2A103SER02
CAP CERAMIC HV 15pF/3.15KV/SL/JCCD3FJASL150
CAP CERAMIC HV 15pF/3.15KV/SL/JCCD3FJASL150
CAP CERAMIC HV 15pF/3.15KV/SL/JCCD3FJASL150
100V J or
CAP POLYESTER FILM 0.01µF/100V JCA2A103SER02