Emerson LD190EM1 Schematic
LCD TV/DVD
chassis FL9.3
SERVICE MANUAL
Contents
19” LD195SSX SYLVANIA Limited
19” LD195EMX EMERSON
19” 19MD359B/F7 MAGNAVOX
19” LD190EM1 EMERSON
19” 19MD350B/F7 MAGNAVOX
19” LD190SS1 SYLVANIA Limited
© 2010 Funai Electric Co., Ltd.
All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated, transcribed,
downloaded or stored in any storage medium, in any form or for any purpose without the express prior written
consent of Funai. Furthermore, any unauthorized commercial distribution of this manual or any revision hereto
is strictly prohibited.
Information in this document is subject to change without notice. Funai reserves the right to change the content
herein without the obligation to notify any person or organization of such changes.
with the design is a registered trademark of Funai Electric Co., Ltd and may not be used in any way
without the express written consent of Funai. All other trademarks used herein remain the exclusive property of
their respective owners. Nothing contained in this manual should be construed as granting, by implication or
otherwise, any license or right to use any of the trademarks displayed herein. Misuse of any trademarks or any
other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights
to the fullest extent of the law.
A94N1UH/A94N4UH/A94N0UH/A9DN4UH/A9DN0UH/A9DN1UH
100402
IMPORTANT SAFETY NOTICE
Proper service and repair is important to the safe, reliable operation of all
Funai Equipment. The service procedures recommended by Funai and
described in this service manual are effective methods of performing
service operations. Some of these service special tools should be used
when and as recommended.
It is important to note that this service manual contains various CAUTIONS
and NOTICES which should be carefully read in order to minimize the risk
of personal injury to service personnel. The possibility exists that improper
service methods may damage the equipment. It also is important to
understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.
Funai could not possibly know, evaluate and advice the service trade of all
conceivable ways in which service might be done or of the possible
hazardous consequences of each way. Consequently, Funai has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a
service procedure or tool which is not recommended by Funai must first
use all precautions thoroughly so that neither his safety nor the safe
operation of the equipment will be jeopardized by the service method
selected.
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.
Manufactured under license from Dolby Laboratories.
Dolby and the double-D symbol are trademarks of Dolby Laboratories.
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Laser Beam Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
How to Initialize the LCD TV/DVD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Schematic Diagrams / CBA and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-1
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-1
SPECIFICATIONS
< LCD TV Section >
< TUNER / NTSC >
ANT. Input ---------------------- 75 Ω Unbal., F type
Description Condition Unit Nominal Limit
1. AFT Pull-In Range --- MHz ±2.3 ±2.1
2. Synchronizing Sens.
TV.ch.4
CA.ch.31
CA.ch.87
dBµ
dBµ
dBµ
18
18
18
20
20
23
< TUNER / ATSC >
Description Condition Unit Nominal Limit
1. Received Freq. Range (-28dBm) --- kHz --- ±100
2. ATSC Dynamic Range (min / max)
ch.4
ch.10
ch.41
dBm
dBm
dBm
---
---
---
-76/0
-76/0
-76/+4
< LCD PANEL >
Description Condition Unit Nominal Limit
1. Native Pixel Resolution
2. Brightness (w / filter) --- cd/m
3. Viewing Angle
Horizontal
Vert ical
Horizontal
Vert ical
pixels
pixels
°
°
1366
768
2
280 ---
-85 to 85
-80 to 80
---
---
---
---
< VIDEO >
Description Condition Unit Nominal Limit
1. Over Scan
2. Color Temperature
3. Resolution (composite video)
Horizontal
Vert ical
--x
y
Horizontal
Vert ical
%
%
°K 12000
line
line
5
5
0.272
0.278
400
350
5±5
5±5
--±3%
±3%
---
---
< AUDIO >
All items are measured across 8 Ω load at speaker output terminal with L.P.F.
Description Condition Unit Nominal Limit
1. Audio Output 10% Distortion
(ATSC 0 dBfs)
2. Audio Distortion (NTSC) 500mW: Lch/Rch % 0.5/0.5 2.0/2.0
3. Audio Freq. Response (NTSC)
Lch/Rch W 1.5/1.5 1.3/1.3
-
6dB: Lch
-
6dB: Rch
1-1 A94N1SP
Hz
Hz
70 to 10 k
70 to 10 k
---
---
<DVD Section>
< DVD >
Description Condition Unit Nominal Limit
1. Horizontal Resolution (TDV-540 TIT.2 CHP.16) --- Line 350 330
2. Audio Distortion (LPCM 48 kHz, W/LPF)
(PTD 1-NOR TIT.1 CHP.1)
3. Audio freq. response (LPCM 48 kHz)
(PTD 1-NOR TIT.1 CHP.5 -- 10)
4. Audio S/N (LPCM 48 kHz, W/LPF, A-WTD)
(PTD 1-NOR TIT.1 CHP.1 -- 2)
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.
L
R
L, 20 Hz
R, 20 Hz
L, 20 kHz
R, 20 kHz
L
R
% 0.03 0.07
dB 0 +4/-5
dB 85 75
1-2 A94N1SP
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.
2-1 TVDVDN_LBSP
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 Liquid
Crystal Panel 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 120 V AC outlet. (Do
not use an isolation transformer during this
test.) Use a leakage current tester or a
metering system that complies with American
National Standards Institute (ANSI) C101.1
Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7).
With the instrument AC switch first in the on
position and then in the off position, measure
from a known earth ground (metal 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 Liquid Crystal
Panel.
CURRENT
TESTER
+
EARTH
GROUND
_
3-1 LTVN_ISP
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this TV
receiver. Design alterations and additions,
including, but not limited to circuit modifications
and the addition of items such as auxiliary audio
and/or video output connections, might alter the
safety 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.
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.
3-2 LTVN_ISP
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.
3-3 LTVN_ISP
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
Chassis or Secondary Conductor
Primary Circuit
AC Line Voltage Region
110 to 130 V
Note: This table is unofficial and for reference only. Be
sure to confirm the precise values.
U.S.A. or
Canada
Clearance
Distance (d), (d’)
≥ 3.2 mm
(0.126 inches)
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.) is
lower than or equal to the specified value in the table
below.
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.
d' d
Fig. 1
Exposed Accessible Part
Z
AC Voltmeter
(High Impedance)
Earth Ground
B
Power Cord Plug Prongs
Fig. 2
Table 2: Leakage current ratings for selected areas
AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:
110 to 130 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
U.S.A. or
Canada
0.15 µF CAP. & 1.5 kΩ
RES. Connected in parallel
3-4 LTVN_ISP
i ≤ 0.5 mA rms
Exposed accessible
parts
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.
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)
Pin 1
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
* Be careful to avoid a short circuit.
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
4-1 TVDVDN_SN
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
Machine
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
Masking
Ta pe
Tweezers
Flat Pack-IC
Fig. S-1-2
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)
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
4-2 TVDVDN_SN
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.
Hot Air Blower
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
To Solid
Mounting Point
CBA
Tweezers
Iron Wire
Soldering Iron
Fig. S-1-5
Fine Tip
Soldering Iron
Flat Pack-IC
or
Presolder
Flat Pack-IC
CBA
Fig. S-1-8
Fig. S-1-6
4-3 TVDVDN_SN
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>
<Correct>
1MΩ
CBA
Grounding Band
1MΩ
CBA
Conductive Sheet or
Copper Plate
4-4 TVDVDN_SN
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.
[17] Junction-A
CBA
[6] Jack Holder
(D)
[7] Digital Main
CBA Unit
[4] DVD
Mechanism
[5] DVD Main
CBA Unit
[13] Speaker
Holder (s)
[14] Speaker (s)
[1] Stand
Assembly
[2] Rear Cabinet
[3] DVD Holder
[10] Main CBA
[11] Stand Holder
[12] LCD Module
Assembly
[19] Front
Cabinet
[15] Junction-C
CBA
[16] Junction-B
CBA
[8] Jack Holder
(A)
[9] Jack CBA
[18] Function
CBA
Removal
Step/
Loc.
No.
Part
Fig.
Remove/*Unhook/
Unlock/Release/
No.
Unplug/Unclamp/
Note
Desolder
Jack
[6]
Holder(D)
D3 (S-8) ---
4(S-9), (S-10),
Digital Main
[7]
CBA UnitD3D5
4(S-11), 2(H-1),
*CN301, *CN302,
*CN303, *CN3902,
Shield Box
Jack
[8]
Holder(A)
[9] Jack CBA
[10] Main CBA
Stand
[11]
Holder
D3 (S-12) ---
D3D54(S-13), CN702,
*CN861A
7(S-14), *CN102,
D3
*CN201, *CN862A,
D5
*CN1001, *CN1002
D4 2(S-15), (S-16) ---
LCD
[12]
Module
D4 --------------- ---
Assembly
Speaker
[13]
Holder(s)
D4 4(S-17) ---
[14] Speaker(s) D4 --------------- ---
---
---
---
2. Disassembly Method
Removal
Step/
Loc.
Part
No.
Stand
[1]
Assembly
Rear
[2]
Cabinet
[3] DVD Holder
DVD
[4]
MechanismD2D5
DVD Main
[5]
CBA Unit
Remove/*Unhook/
Fig.
No.
Unlock/Release/
Unplug/Unclamp/
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 --------------- ---
Note
---
1
2
3
4
5
6
[15]
[16]
[17]
[18]
[19]
↓
(1)
Junction-C
CBA
Junction-B
CBA
Junction-A
CBA
Function
CBA
Front
Cabinet
↓
(2)
D4
Desolder ---
D5
D4
Desolder ---
D5
D4
Desolder ---
D5
D4
2(S-18) ---
D5
D4 --------------- ---
↓
(3)
↓
(4)
↓
(5)
5-1 A94N1DC
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,
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 difference caused by electrostatic charge
accumulated on cloth, human body etc., during
unpacking or repair work.
To avoid damage of pickup follow next procedures.
1) Short the three short lands of FPC cable with
solder 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)
2) Disconnect the Connectors (CN301), and
(CN801). Remove Screw (S-7) and remove the
DVD Main CBA 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
Mechanism to the three connectors (CN201,
CN301, CN801) on the DVD Main CBA 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 solder 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 seconds.
5. How to eject manually 1
1) Remove the Rear Cabinet.
2) 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
1) Remove the Rear Cabinet.
2) To remove the DVD Main CBA Unit, remove a
screw (S-7) in Fig. D2. Do not disconnect
connectors.
3) To remove the Chassis Cover, remove two
screws A as shown in Fig. D2.
4) Remove a disc.
5-2 A94N1DC
[2] Rear Cabinet
(S-2)
(S-4)
(S-2)
(S-3)
(S-2)
[1] Stand Assembly
(S-1)
Fig. D1
5-3 A94N1DC
(S-5)
(S-7)
[3] DVD Holder
[5] DVD Main CBA 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
5-4 A94N1DC
(S-11)
[7] Digital Main
CBA 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 CBA
[9] Jack CBA
(S-14)
Fig. D3
5-5 A94N1DC
[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
5-6 A94N1DC
TV Cable Wiring Diagram
To DVD Mechanism
To LCD Module
Assembly
Main CBA
CN1001
CN1002
CN301
DVD Main
CBA Unit
CN801
CN201
CN201
CN401
CN601
CN902
CN901
CN301
CN302
CN303
CN702
To LCD Module
Assembly
Digital Main
CBA Unit
CN3902
CN3701
CN3702
CN4001
Jack CBA
CN862B
CN862A
AC CORD
Junction-B
CBA
CL862
To Speaker
Function CBA
CN101B
CN102
Junction-A CBA
CN101
CN101A
CN861B
CN701
CN861A
Junction-C CBA
CL861
To Speaker
Fig. D5
5-7 A94N1DC
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. NTSC Pattern Generator (Color Bar W/White
Window, Red Color, Dot Pattern, Gray Scale,
Monoscope, Multi-Burst)
2. Remote control unit
3. Color Analyzer
How to make the Service remote
control unit:
[LD195SSX, LD190EM1, LD190SS1]
Cut “A” portion of the attached remote control unit as
shown in Fig. 1.
service button
[19MD359B/F7, 19MD350B/F7]
Cut “A” portion of the attached remote control unit as
shown in Fig. 3.
service button
(There is a button under the plastic housing.)
A
Fig. 3
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.
A
.
[LD195EMX]
Fig. 1
Cut “A” portion of the attached remote control unit as
shown in Fig. 2.
service button
"*" differs depending on the models.
Code :
***********-***
Pic code :
**-***-**-*****-***
MIPS :
Push 0key
Tuner :
****-*****-****
safety_Non
Safety :
A
Fig. 2
6-1 FL9.3EA
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 Adj. Point
Screen
[CHANNEL UP/DOWN ]
buttons
M. EQ. Spec.
Color analyzer See below
Figure
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
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. Press [3] button on the service remote control unit.
5. Press [CHANNEL UP/DOWN] buttons on the
service remote control unit so that the color
analyzer value becomes minimum.
[7] button
White 20% mode
Note:
When entering this mode, the default setting is White mode.
6-2 LC7NEA
The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital CBA.
3. White Balance Adjustment
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
M. EQ. Spec.
White Raster
(APL 70%)
or
(APL 40%)
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 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
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
Perpendicularity
L = 3 cm
INPUT: WHITE 70%, 40%
Color Analyzer
1. Operate the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 40%=40IRE).
INPUT SIGNAL
0IRE 0IRE
Low
Hight
Light
Light
100IRE
40%=40IRE
70%=70IRE
100IRE
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.
6-3 LC7NEA
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.
< DVD 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. To put the LCD TV/DVD into the DVD mode, press
[CH RETURN] or [PREV CH] on the remote
control unit.
4. To put the LCD TV/DVD into the Flash clear mode,
press [INPUT SELECT] or [SOUCE] buttons on
the remote control unit in that order within five
seconds.
The following screen appears.
Flash Memory Clear : OK
CHUCKING ON
< 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.
Note: The name of buttons may vary with the brand
of unit.
7-1 A94N1INT
FIRMWARE RENEWAL MODE
< 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.
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
automatically. Fig. b appears on the screen. Make
sure to insert the proper F/W for the state of this
model.
"
*******
F/W Version Up Mode Model No : ******
VERSION : ************.***
(*1)
Reading...
VERSION : *.**
EXIT: SELECT
" differ depending on the models.
VERSION : *.**
5. After programming is finished, the disc will be
ejected automatically. 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
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
: *.**
: *
Fig. b Programing Mode Screen
The appearance shown in (*1) of Fig. b is
described as follows:
AppearanceNo. State
Reading... Sending files into the memory
1
Erasing... Erasing previous version data
2
Programming...
3 Writing new version data
EXIT: SELECTEEPROM CLEAR : CLEAR
Fig. d
10. Press [CLEAR] button on the remote control unit.
Fig. e appears 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.
8-1 A94N1FW
< LCD TV Section >
Equipment Required
a. USB memory
b. Remote Control Unit
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 appearance shown in *1 is described as follows.
Appearance State
Downloading...
Writing...
Downloading the firmware from
the USB memory.
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 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
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.
The software upgrade is completed.
Remove USB storage device, unplug and replug power code.
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.
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%
Note: If the above screen isn’t displayed, repeat from
step 1.
8-2 A94N1FW
[ Power Supply Section ]
FLOW CHART NO.1
The power cannot be turned on.
TROUBLESHOOTING
Is the fuse (F601) normal?
Ye s
Is normal state restored when once unplugged
power cord is plugged again several seconds?
Ye s
Is the INV+31V line voltage normal?
Ye s
Check each rectifying circuit of the secondary
circuit and service it if de
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.
fective.
No
No
No
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 presence that the rectifying diode or circuit
is shorted in each rectifying circuit of secondary side,
and service it if defective.
Does the photocoupler circuit on
secondary side operate normally?
Check IC601, D
circuit and service it if defective.
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
and service it if def
Q904, D631, D632, D636, D638, D639, D640, D641, D643)
FLOW CHART NO.5
INV+31V is not output.
Is approximately +31V voltage supplied to the
cathode of D632?
Check D667, R655 and their periphery circuit, and
service it if de
608, D610 and their periphery,
ective. (IC631, IC901, Q201, Q205, Q206, Q6
fective.
the
Ye s
Ye s
No
34, Q635, Q636, Q637, Q6
No
Check IC601, D633, Q631 and their periphery
circuit, and service it if defective.
in each rec
Check C632, D632, D633 and their periphery
circuit, and service it if defective.
tifying circuit of the secondary side,
40, Q641, Q643, Q901, Q903,
9-1 A94N1TR
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-ON-H1 line and their
periphery circuit, and service it if defec
FLOW CHART NO.7
PANEL+13V is not output.
Is approximately
collector of Q201?
Is approximately +13V voltage supp
base of Q201?
Replace Q201.
FLOW CHART NO.8
P-ON+7V is not output.
+15V voltage supp
Ye s
Ye s
tive.
lied to the
lied to the
No
No
No
See FLOW CHART No.5
Check C631, D
and service it if de
Check Q202, Q203, D201, D202, D210 and their
periphery circuit, and ser
631, D668 and their periphery circuit,
fective.
vice it if defective.
Is approximately +
cathode of D641?
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 +
collector of Q635?
Is approximately +6V voltage supp
base of Q635 and the ba
Replace Q635 and Q636.
7V voltage supplied to the
Ye s
6.8V voltage supplied to the
Ye s
lied to the
se of Q636?
Ye s
No
No
No
Check C641, D641 and their periphery circuit,
and service it if de
See FLOW CHAR
Check D659 and
it if defective.
fective.
T No.8
their periphery circuit, and service
9-2 A94N1TR
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
the loaded circuit, and ser
FLOW CHART NO.12
P-ON+3.3V(PANEL+3.3V) is not output.
any leak or short-circuit on
vice it if defective.
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 defective.
Is approximately +
cathode of D639?
Is the "H" s
base of Q640?
Replace Q640.
FLOW CHART NO.13
EV+3.3V is not output.
Is approximately +4.6V voltage supp
collector of Q903?
Check Q903, D905 and their periphery
circuit, and service it if def
5V voltage supplied to the
Ye s
ignal (approximately +3.5V) inputted to
Ye s
Ye s
ective.
lied to the
the
No
No
No
Check C639, D639 and their periphery circuit, and
service it if defective.
Check Q638, Q639, P-ON-H2 line an
circuit, and service it if defective.
Check C638, D638 and their periphery circuit, and
service it if defec
tive.
d their periphery
9-3 A94N1TR
Loading...