This Service Manual is for the 22FL532/10 (A2370EP) model.
For the 22FL532/10 (A2370EP) model, the letter (A2370EP) is printed on
the Serial Number Label on the back of the unit. Refer to the Serial
Number Label below.
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
All items are measured across 16 Ω load at speaker output terminal.
DescriptionConditionUnitNominalLimit
1. Audio Output Power
2. Audio Distortion 500mW: Lch/Rch%1.5/1.53.0/3.0
3. Audio Freq. Response
4. Audio S/NLch/RchdB---
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.
input 500mVrms
VOL MAX
-
6dB: Lch
-
6dB: Rch
W1.5W/1.5W1.3W/1.3W
Hz
Hz
---
---
---
---
≧45/45
1-2A2370SP
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)
≥8mm(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.
To p Vi ew
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
Ta pe
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 “ I ” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the
pin 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
items to be serviced. When reassembling, follow the
steps in reverse order. Bend, route and dress the
cables as they were.
[3] Power Supply
CBA Unit
[5] Speaker
[1] Rear Cover
[2] Stand Cover
Assembly
[6] Stand Holder
[8] LCD Panel
Assembly
[9] Rear Frame
[10] LCD Module
[11] Front
Cabinet
[4] Digital Main
CBA Unit
[7] Function
CBA Unit
2. Disassembly Method
Step/
Loc.
Part
No.
[1]Rear Cover D1 8(S-1), 6(S-2)---
Stand
[2]
Cover
Assembly
Power
[3]
Supply
CBA Unit
Digital Main
[4]
CBA UnitD2D5
[5]SpeakerD3 ------------------
Stand
[6]
Holder
Function
[7]
CBA UnitD3D5
LCD Panel
[8]
Assembly
[9]Rear Frame D4 9(S-8), 2(S-9)1,3
LCD
[10]
Module
Front
[11]
Cabinet
↓
(1)
↓
(2)
Fig.
No.
RemovalNote
D1 2(S-3)---
D2D53(S-4), CN1, CN2,
CN3, CN4, CN5
4(S-5), CN5, CN9,
CN23, Jack Holder,
Shield Box
D3 2(S-6), (S-7)---
Sensor Lens2,3
D3 ---------------3
D4 ---------------1,3
D4 ---------------3
↓
(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.
N = Nut, L = Locking Tab, S = Screw,
H = Hex Screw, CN = Connector
e.g. 2(S-2) = two Screws of (S-2),
2(L-2) = two Locking Tabs of (L-2)
(5) Refer to the following "Reference Notes in the
Ta b le . "
Precautions concerning the LCD Panel
Assembly:
1. When you disassemble the LCD Panel
Assembly
• Be careful not to scratch the Reflection Sheet with
the edge of Rear Frame when disassembling/
re-assembling it.
• Be careful not to drop any plastic chip on the
Reflection Sheet when/after you remove the Screws.
• Prohibit to put any external pressure on the
Reflection Sheet because the scratch on the back of
the Reflection Sheet have direct repercussion on the
display screen.
• Prohibit to put any external pressure on the Sheet
Holder or LED Heat Sink Assembly either because it
also has repercussion on the display screen via the
Reflection Sheet.
• You need to remove any visible dust from the
Reflection Sheet which creates the external
pressure between the Reflection Sheet and the
Sheet Holder/LED Heat Sink Assembly as a result.
• To prevent the Screw from being stripped, the screw
tightening torque should be 13.23 lbf·in(6 kgf·cm) for
the Rear Frame Screw and 5.512 lbf·in(2.5 kgf·cm)
for the LED Heat Sink Assembly Screw.
• Do not pull the FFC Cable and Board Cable
forcefully when you re-assemble.
4-1A2370DC
Page 13
2. When you disassemble/re-assemble the
Function CBA Unit on the Front Cabinet
• Detach the Function CBA Unit, which is attached on
the Front Cabinet with double-sided tape, without
breaking it.
• When you put the Function CBA Unit back on the
New Front Cabinet, you need to use specified new
double-sided tape and put the Function CBA Unit
onto the New Front Cabinet with equal pressure to
the Board. (The gap more than 0.015 inch (0.4 mm)
between the Front Cabinet and Function CBA Unit
will impair the sensor sensitivity.)
• Prepare for substitutional Function CBA Unit in case
you break it when you detach it from the Front
Cabinet.
3. Performance Test after reassembling the LCD
Panel Assembly
• After you swap any of the Front Cabinet, Rear Frame
or Function CBA Unit, you need to make sure that
there is no Gomikami/Black Spot with foreign
material or Mura/White Spot on the display screen.
• Make sure there is no malfunction on the display
screen by checking the White Mode and White 20%
Mode in the Purity Check Mode.
• Check the operational sensitivity on Touch Sensor
Control Panel to make sure everything functions
normally.
[2] Stand Cover Assembly
(S-1)
[1] Rear Cover
(S-1)
(S-2)
(S-1)
(S-2)
(S-3)
Fig. D1
4-2A2370DC
Page 14
[4] Digital Main CBA Unit
Jack Holder
Shield Box
(S-5)
[3] Power Supply
CBA Unit
(S-4)
(S-4)
Double-sided tape
(S-5)
[8] LCD Panel Assembly
[7] Function CBA Unit
*
[6] Stand Holder
Fig. D2
1
*
1
Sensor Lens
(S-6)
(S-7)
(S-6)
[5] Speaker
*1: Make sure to read all the precautions on page 4-1, 4-2 when you disassemble/re-assemble
the LCD Panel Assembly.
4-3A2370DC
Fig. D3
Page 15
[11] Front Cabinet
1
*
LED Heat Sink Assembly
Sheet Holder
(S-8)
Reflection Sheet
FFC Cable
Cable
(S-9)
Sheet Holder
[10] LCD Module
[9] Rear Frame
(S-8)
1
*
(S-8)
1
*
*1: Make sure to read all the precautions on page 4-1, 4-2 when you disassemble/re-assemble
the LCD Panel Assembly.
Fig. D4
4-4A2370DC
Page 16
TV Cable Wiring Diagram
To LCD Panel
Assembly
CN4
Power Supply CBA Unit
CN2
To LCD Panel
Assembly
Digital Main
CBA Unit
CN5
CN2
CN1
To AC Cord
Function CBA Unit
CN1
CN3
CN5
CN3
CN24
CN23 CN9
To Speaker
Fig. D5
4-5A2370DC
Page 17
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. Remote control unit
2. Color Analyzer,
CA-310 (KONICA MINOLTA Luminance meter) or
measuring instrument as good as CA-310.
How to set up the service mode:
Service mode:
1. Turn the power on.
2. Press [SOURCE], [2], [5], [8] and [0] buttons on
the remote control unit in this order to enter the
service mode. The Factory Setting menu appears
in the screen.
Example:
The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital Main CBA.
White Balance Adjustment
Purpose: To mix red and blue beams correctly for
pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
1. Operate the unit for more than 60 minutes.
2. Input the White Raster (70%=70IRE,
40%=40IRE).
INPUT SIGNAL
3. Enter the service mode.
4. Press [2] button on the remote control unit to
display the “GENERAL SETTING” menu.
5. Select “0 W/B ADJUST” and press [OK] button to
display the “W/B ADJUST” menu.
6. Select a color mode (“3 R-GAIN”, “5 B-GAIN”,
“7 R-OFFSET” or “9 B-OFFSET”).
7. Set the color analyzer at the CHROMA mode and
zero point calibration. Bring the optical receptor
pointing at the center of the LCD-Panel.
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
Perpendicularity
L = 1 cm
INPUT: WHITE 70%, 40%
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
8. In each color mode, press [s] or [B] button to
adjust the color temperature becomes 9000°K
(x
=
0.286 / y= 0.295 ±0.002).
9. Select “10COPY ALL” and press [OK] button.
10. To cancel or to exit from the White Balance
Adjustment, press [BACK] button.
Color Analyzer
5-1LC10P(A2370EP)EA
Page 18
HOW TO INITIALIZE THE LCD TELEVISION
1. Turn the power on.
2. Enter the service mode. (Refer to page 5-1.)
- To cancel the service mode, press [BACK]
button on the remote control unit.
3. Select “Factory Reset” and [OK] button on the
remote control unit.
The TV set will go off and turn back on
automatically when initialization completes.
6-1LC10P_INT
Page 19
FIRMWARE RENEWAL MODE
Equipment Required
a. USB storage device
b. Remote Control Unit
Firmware Update Procedure
[Preparation]
1. Prepare USB storage device.
2. Copy F/W-file to USB storage device.
Note: Make sure to use the blank USB Storage.
3. Make sure that the F/W-file’s name is
“BIN_MSD_309.bin”.
[Update procedure]
1. Turn the power on.
2. Insert USB storage device with F/W to TV set.
3. Press the [MENU] button on the remote control
unit to display Menu.
4. Select “SETUP”.
5. Select “Software Update (USB)” and press [OK]
button.
The message “Are you sure?” will appear in the
screen.
6. Press [LEFT] button to select “YES”.
7. Updating starts.
Note: Do not turn off the TV set and do not
remove the USB storage device while this
procedure.
8. The TV set will go off and turn back on
automatically when update completes.
[Confirmation of update]
1. Enter the service mode. (Refer to page 5-1.)
2. Press [4] button on the remote control unit to
display the “SW INFORMATION”.
3. Check the “Build Time” section.
7-1LC10P_FW
Page 20
FLOW CHART NO.1
The power cannot be turned on.
TROUBLESHOOTING
Is approximately +5V voltage supplied to Pin(1) of CN2
on the Power Supply CBA Unit?
Ye s
When touching power button on the unit, is the LED
turning off?
Ye s
When pressing power switch on the remote control unit,
is the LED turning off?
Ye s
Is approximately
CN2 on the Digital Main CBA Unit?
Replace Power Supply CBA Unit.
FLOW CHART NO.2
The key operation is not functioning.
Is approximately +5V voltage supplied to Pin(1) of CN1
on the Function CBA Unit?
+3.3V voltage supplied to Pin(2) of
Ye s
Ye s
No
No
No
No
No
Check F101 and service it if defective.
Or replace Power Supply CBA Unit.
See FLOW CHART NO.2 <The key operation is not
functioning.>
See FLOW CHART NO.3 <No operation is possible
from remote control unit. (Operation is possible from
the unit.)>
Replace Digital Main CBA Unit.
Replace Power Supply CBA Unit.
Replace Function CBA Unit.
FLOW CHART NO.3
No operation is possible from remote control unit. (Operation is possible from the unit.)
gital
No
No
No
Replace Power Supply CBA Unit.
Replace Function CBA Unit.
Check the connector (CN1, CN9), wire assembly and
service it if defective. Or replace Function CBA Unit.
V voltage supplied to Pin(1) of CN1
approximately +
Is
on the Function CBA U
Is the "L" pulse sent out to Pin(3) of CN1 on the
Function CBA Unit?
Is the "L" pulse sent out to Pin(4) of CN9 on the Di
Main CBA Unit?
Replace Digital Main CBA Unit.
5
nit?
Ye s
Ye s
Ye s
8-1A23F0TR
Page 21
FLOW CHART NO.4
Picture does not appear normally.
approximately +5
Is
on the Digital Main CBA Unit?
approximately +
Is
CN3 and Pin(10) of CN2 on the Digital Main CBA Unit?
CL1001, C
Assembly ma
Check and repla
FLOW CHART NO.5
Audio is not outputted normally.
approximately +
Is
CN24 on the
Are the audio signals outputted to Pin(1, 4) of
CN23
L3006, Digital Main CBA Unit or LCD Panel
on the
V voltage supplied to Pin(1) of CN2
Ye s
12V voltage supplied to Pin(1, 2) of
Ye s
y be defective.
ce these parts.
24V voltage supplied to Pin(1, 2) of
Digital Main CBA Unit
Digital Main CBA Unit
?
Ye s
?
Ye s
No
No
No
No
Replace Power Supply CBA Unit.
Replace Power Supply CBA Unit.
Replace Power Supply CBA Unit.
Replace Digital Main CBA Unit.
Speakers may be defective.
Check and replace these parts.
8-2A23F0TR
Page 22
BLOCK DIAGRAMS
System Control Block Diagram
POWER
TV/AV
MENU
CH UP
CH DOWN
VOL UP
VOL DOWN
9
8
MENU
CH UP
CH DOWN
D15
POWER
7
VOL UP
10
VOL DOWN
RE2
SENSOR
REMOTE
121113
POWER
REMOTE
IR-KEY
U1
(TOUCH SENSOR)
20
19
TV/AV
FUNCTION CBA UNIT
TO POWER SUPPLY
BLOCK DIAGRAM
PS-ON
TO LED BACKLIGHT DRIVE
BLOCK DIAGRAM
BACKLIGHT-SW
BACKLIGHT-ADJ
POWER SUPPLY CBA UNIT
CN1
REMOTE43
LED-R22
IR-KEY65
CN9
H5
G5
G4
KEYB
LED-R
REMOTE
SCL
SDA
T1 (TUNER UNIT)
4
5
AE4
AD4
TUNER-SCL
TUNER-SDA
STB+5V
CN2
CN3
PS-ON
BACKLIGHT-SW
22
CN2
Q6
M+5V
Q9
Q10
C5
POW-EN
BACKLIGHT-ADJ
33
44
CN3
Q3
Q2
STB+3.3V
RESET
L5
BACKLIGHT-SW
E6
BACKLIGHT-ADJ
E5
RESET
U7
(MAIN MICRO CONTROLLER)
AMP-MUTE
Y9
AMP-MUTE
TO AUDI O
BLOCK DIAGRAM
9-1
SPI-SCK
SPI-SDI
SPI-SDO
SPI-CSN
A2B3A3
A4
652
1
SI
CS
SO
SCK
U9 (MEMORY)
Y1
XTAL-OUT
XTAL-IN
AE2
AD1
24MHz
OSC
DIGITAL MAIN CBA UNIT
A2370BLS
Page 23
Video Block Diagram
AUDIO SIGNAL
TO DIGITAL SIGNAL
PROCESS
BLOCK DIAGRAM
TO DIGITAL SIGNAL
PROCESS
BLOCK DIAGRAM
VIDEO SIGNAL
IF-AGC
DIF-OUT2
DIF-OUT1
VIDEO-B
VIDEO-R
VIDEO-G
RGB-VIDEO-IN
RGB-VIDEO-OUT
VIDEO-IN
COM-Y-IN
COM-Pb-IN
COM-Pr-IN
T1
(TUNER UNIT)
9
11
10
IF-AGC
DIF-OUT1
DIF-OUT2
CN4
SCART JACK
15
20
11
VIDEO-R
VIDEO-G
RGB-VIDEO-IN
BUFFER
Q12, Q26
7
19
VIDEO-B
RGB-VIDEO-OUT
CN17
VIDEO-IN
CN8
COMPONENT
-Y IN
COMPONENT
-Pb-IN
COMPONENT
-Pr-IN
DIGITAL MAIN CBA UNIT
9-2
A2370BLV
Page 24
Audio Block Diagram
AUDIO SIGNAL
TO DIGITALSIGNAL
PROCESS
BLOCK DIAGRAM
SPDIF
AUDIO(L)
AUDIO(R)
PC-AUDIO(L)
PC-AUDIO(R)
RGB-AUDIO(L)-OUT
RGB-AUDIO(R)-OUT
AMP(L)-OUT
RGB-AUDIO(L)-IN
RGB-AUDIO(R)-IN
AMP(R)-OUT
TO SYSTEM
CONTROL
BLOCK DIAGRAM
AMP-MUTE
AP+5V
DIGITAL MAIN CBA UNIT
19
DRIVEPWM
U13 (AUDIO AMP)
11,12
32DRIVEPWM
39,40
Q23
Q24
34
CONTROL LOGIC
CN19
DIGITAL
CN17
AUDIO-OUT
(COAXIAL)
AUDIO(L)-IN
AUDIO(R)-IN
CN26
PC-AUDIO-IN
CN4
SCART JACK
3
6
2
RGB-AUDIO(L)-IN
RGB-AUDIO(R)-IN
RGB-AUDIO(L)-OUT
1
RGB-AUDIO(R)-OUT
9-3
CN13
HEADPHONE
JACK
CN23
SP(L) 1
SP-GND 3
SP-GND 2
SPEAKER
L-CH
SP(R) 4
SPEAKER
A2370BLA
R-CH
Page 25
Digital Signal Process Block Diagram
LCD PANEL
ASSEMBLY
LVDS-ED0(+)
LVDS-ED0(-)
LVDS-ED1(+)
LVDS-ED1(-)
LVDS-ED2(+)
LVDS-ED2(-)
LVDS-ED3(+)
LVDS-ED3(-)
LVDS-CE(+)
LVDS-CE(-)
27
28
AUDIO SIGNAL
LVDS-OD3(-)
17
CN5
LVDS-OD3(+)
19
20
18
22
23
21
242930
TO VIDEO
BLOCK DIAGRAM
79461
TMDS-D0(-)
TMDS-D0(+)
TMDS-D1(+)
HDMI-IN2
CN12
3
TMDS-D1(-)
TMDS-D2(-)
TMDS-D2(+)
101216
15
SCL
SDA
TMDS-CLOCK(-)
TMDS-CLOCK(+)
VIDEO SIGNAL
U7 (DIGITAL SIGNAL PROCESS)
T1
T3
W2
AC22
R2
AE22
AD21
U3P2N2
A/D
AC20
CONVERTER
SW
M1
AD20
AA5
AE20
(SDRAM)
RGB-VIDEO-OUT
DQ(0-15)
U4
AE19
AC19
M3
LVDS
L3
AD18
TX
K3
AC17
AD19
PC-HS
PC-VS
N4N5N6
AC18
VGA-SDA
VGA-SCL
P6
DIGITAL
SIGNAL
PROCESS
CI CONTROL
DESCRAMBLER
/TS INTERFACE
V3
MA-DQ(0-15)
DAC
DEMODULATOR
/MPEG DECODER
IF-AGC
R4V6R5
AA2
AA3
AD3
(SDRAM)
A(0-13)
U6
MA-A(0-13)
U5
AA6
DQ(0-15)
A(0-13)
MB-DQ(0-15)
MB-A(0-13)
AUDIO I/F
T6
Y5
V1V2P5
U6
E3
D2
VIDEO
DECODER
AUDIO
DECODER
H3
G2
F3E2F1
J3H2J1
F2
D1
HDMI I/F
J2
G1
J6
L6
D3
HDMI SW
G3
M5
M4
COM-Y-IN
VIDEO-IN
COM-Pb-IN
VIDEO-R
VIDEO-G
COM-Pr-IN
TO VIDEO
BLOCK
DIAGRAM
VIDEO-B
RGB-VIDEO-IN
PC-RGB-IN
CN16
RED
GREEN
1
2
BLUE
3
HSYNC
VSYNC
13
CI-D(0-7)
CI-A(0-14)
DIGITAL MAIN CBA UNIT
AMP(L)-OUT
AMP(R)-OUT
AUDIO(L)
AUDIO(R)
PC-AUDIO(L)
PC-AUDIO(R)
RGB-AUDIO(L)-OUT
RGB-AUDIO(R)-OUT
TO AUDIO
BLOCK
RGB-AUDIO(L)-IN
DIAGRAM
DIF-OUT1
IF-AGC
DIF-OUT2
DATA
CLOCK
12
15
14
CI
CARD
SLOT
CN10
TO VIDEO
BLOCK
DIAGRAM
9-4
RGB-AUDIO(R)-IN
SPDIF
TMDS-D0(+)
TMDS-D0(-)
TMDS-D1(+)
79461
TMDS-D1(-)
TMDS-D2(+)
TMDS-D2(-)
3
HDMI-IN1
CN11
SDA
SCL
TMDS-CLOCK(+)
TMDS-CLOCK(-)
101216
15
A2370BLD
Page 26
LED Backlight Drive Block Diagram
LCD PANEL
ASSEMBLY
LED16
LED-VCC4
CN4
LED27
LED32
LED41
DRIVE1
U401(LED BACKLIGHT DRIVER)
Q401
DRIVE214DRIVE316DRIVE4
OVP
3
7136
CONTROL
LOGIC
5
BACKLIGHT-SW
1
POWER SUPPLY CBA UNIT
12
BACKLIGHT-ADJ
VDRV (+24V)
9-5
TO SYSTEM CONTROL
BLOCK DIAGRAM
A2370BLLD
Page 27
Power Supply Block Diagram
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
AMP+12V
+12V
M+5V
STB+5V
+12V
PANEL+5V
DIGITAL MAIN CBA UNIT
CN24
CN5
Q103
1,2
AMP+12V1,2
SW+12V
CN3
CN3
U104
1,2+12V1,2
REG.
SHUNT
Q104
CN2CN2
SW+5V
VDRV
1
10+12V10
5-8
STB+5V1
+5V5-8
Q201
TO SYSTEM CONTROL
BLOCK DIAGRAM
PS-ON
Q202
Q204
Q203
8
7
T101
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F101) 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.
HOT CIRCUIT. BE CAREFUL.
6
BRIDGE
BD1-BD4
LINE
LF102
LINE
LF101
F101
T5A L 250V
1
CN1
RECTIFIER
FILTER
FILTER
2
11
5
4
9
12
10
3
1
HV
U101
(SWITCHING CONTROL)
SWITCHING
Q101
844
GATE
SENS
14
(FEED BACK)
U102
2
FB
32
7
VCC
U103
REG.
SHUNT
HOTCOLD
POWER SUPPLY CBA UNIT
CN1
AC CORD
9-6
A2370BLP
Page 28
1
CN5
V-IN+5V
CL3006
2
V-IN+5V
V-IN+5V
4
GND
GND
735
6
GND
LVDS-OD0(-)
WIRING DIAGRAM
8
9
101513
LVDS-OD1(-)
LVDS-OD0(+)
LVDS-OD1(+)
12
11
GND
LVDS-OD2(-)
LVDS-OD2(+)
14
GND
LVDS-CO(-)
17
16
LVDS-CO(+)
LVDS-OD3(-)
19
20
18
LVDS-ED0(-)
LVDS-ED0(+)
LVDS-OD3(+)
21
23
2425262728293031323334353637383940
22
LVDS-ED2(-)
LVDS-ED1(-)
LVDS-ED2(+)
LVDS-ED1(+)
GND
GND
LVDS-CE(-)
LVDS-CE(+)
GND
LVDS-ED3(-)
LVDS-ED3(+)
GND
NU
CON1
VSEL1
VSEL2
LVDS-ED4(-)
LVDS-OD4(-)
LVDS-OD4(+)
LVDS-ED4(+)
LCD PANEL ASSEMBLY
DIGITAL MAIN CBA UNIT
CL1001
LED4
LED3NULED-VCCNULED1
1234567
CN4
123456789
CN2
CL2
STB+5V
PS-ON
GND
GND
+5V
+5V
12345
CN2
6
+5V
7
+5V
8
GND
9
LED2
10
+12V
10
POWER SUPPLY
CBA UNIT
CN3
CL3
CN3
234
1
+12V
+12V
BACKLIGHT-SW
23456
1
BACKLIGHT-ADJ
5
GND
6
GND
1
CN5
CL24
AMP+12V
1
CN24
234
AMP+12V
GND
GND
234
CN1
1
2
CN1
AC CORD
SPEAKER
CL23
TUNER UNIT
L-CH
CN23
1
SP(L)
SP-GND
SP-GND
432
SP(R)
SPEAKER
R-CH
CN1
CL9
CN9
+5V
1
1
+5V
LED-R
REMOTE
3
2
3
2
LED-R
LED-G
GND
REMOTE
IR-KEY
GND
6
645
GND
IR-KEY
FUNCTION CBA UNIT
GND
745
COMPONENT
-Y-IN
COMPONENT
-Pb-IN
VIDEO-IN
COMPONENT
-Pr-IN
AUDIO(L)-IN
AUDIO(R)-IN
REAR
HDMI-IN1
HDMI-IN2
10-1
HEADPHONE
JACK
SCART JACK
DIGITAL
AUDIO-OUT
(COAXIAL)
PC-RGB-IN
USB JACK
SIDEPC-AUDIO-IN
CI CARD
SLOT
A2370WI
Page 29
Cabinet
EXPLODED VIEWS
A19
LCD Module
L3
A1
CL1001
CL3006
L51
L51
L13
L3
L3
A2
LCD1
CL3
CL2
L3
CL24
Digital Main CBA Unit
CL9
CL23
B6
L13
A14
B18
B17
A9
Function CBA Unit
See Electrical Parts List
for parts with this mark.
Power Supply CBA Unit
CN1
Stand Cover Assembly
B9
Speaker
L13
L14
SSK1
L3
Speaker
A18
L14
A3
L14
L3
L14
L3S7
11-1A2370CEX
Page 30
Packing
Some Ref. Numbers are
not in sequence.
Ta pe
X3A23X7X4SSK1
Stand Cover Assembly
X2
Ta pe
S4
S3
X1
S6
Packing Tape
S4
S7
S1
11-2A2370PEX
Packing Tape
Page 31
MECHANICAL 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.
NOTE: Parts that are not assigned part numbers
(---------) are not available.
! 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%
Ref. No.DescriptionPart No.
DIGITAL MAIN CBA UNITUPBMATCVT003
POWER SUPPLY CBA UNITUPBPSPSTP003
FUNCTION CBA UNITUPB000CVT001
CN1!AC CORD W/O A GND WIRE CEE/1680/NO/
!AC CORD W/O A GND WIRE CEE/1680/NO/
!AC CORD W/O A GND WIRE CEE/1680/NO/
T1TUNER UNIT DT58CT-2-EUTNPSGTCL001
BLACK or
BLACK or
BLACK
WAE1620LW003
WAE162LTE001
WAE162ZHN002
2012/03/2814-1A2370EL.fm
Page 33
22FL532/10
A2370EP
2012-04-04
Ver.1
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