Symphonic STL1504 User manual

15” COLOR LCD TELEVISION
STL1504
SERVICE MANUAL

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 de-
scribed 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 under-
stand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai
could not possibly know, evaluate and advice the service trade of all con-
ceivable 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 proce-
dure or tool which is not recommended by Funai must first use all precau-
tions thoroughly so that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
TABLE OF CONTENTS
Specifications........................................................ 1-1
Important Safety Precautions................................ 2-1
Standard Notes for Servicing ................................ 3-1
Cabinet Disassembly Instructions......................... 4-1
Electrical Adjustment Instructions ......................... 5-1
Block Diagrams..................................................... 6-1
Schematic Diagrams / CBA’s and Test Points...... 7-1
Schematic Diagrams............................................. 7-3
CBA Views and Test Points................................. 7-19
Waveforms ............................................................ 8-1
Wiring Diagram...................................................... 9-1
Cabinet Exploded View ....................................... 10-1
Packing Exploded View....................................... 10-3
Mechanical Parts List .......................................... 11-1
Electrical Parts List.............................................. 12-1
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.

1-1 L0201SP
SPECIFICATIONS
<TUNER> ANT. Input ------------------- 75ohm Unbal., F type
Reference Level------------20Vp-p (CRT Green Cathode)
Test Input Signal -----------400Hz 30% modulation
<LCD PANEL>
<VIDEO>
<AUDIO> All items are measured across 8Ωload at speaker output terminal with L.P.F.
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.
Description Condition Unit Nominal Limit
1. Intermediate Freq. Picture
Sound MHz MHz 45.75 41.25 - -
2. Color Killer Sens. CH-2
CH-10
CH-55
dBµV
dBµV
dBµV
15
15
15
20
20
20
3. AFT Pull In Range
(10mV input) - MHz ±2.1 ±0.7
Description Condition Unit Nominal Limit
1. Number of Pixels Horizontal
Vertical pixels pixels 640 x 3 480 - -
2. Brightness cd/m2450 -
3. Response Time - msec 16 -
4. Support Color - - 26mil.(6bit) -
5. Viewing Angle Horizontal
Vertical ° °-85 to 85 -85 to 70 -
Description Condition Unit Nominal Limit
1. Over Scan Horizontal
Vertical % %7 7- -
2. Color Temperature -
x
y
°K 9200
0.286
0.294
-
±0.03
±0.03
3. Resolution Horizontal
Vertical line line 400 350 - -
Description Condition Unit Nominal Limit
1. Audio Output Power 10% THD: Lch/Rch W 1.0/1.0 0.8/0.8
2. Audio Distortion 500mW: Lch/Rch % 1.0/1.0 4.0/4.0
3. Audio Freq. Response
- 3dB: Lch
- 3dB: Rch Hz Hz 50 to 12K 50 to 12K - -

2-1 L6115IMP
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 TV Circuit
1. Before returning an instrument to the custom-
er, always make a safety check of the entire instru-
ment, including, but not limited to, the following
items:
a. Be sure that no built-in protective devices are de-
fective 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, in-
cluding any removed for servicing convenience. (2)
When reinstalling the chassis and/or other assem-
bly 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 oper-
ate this instrument or permit it to be operated
without all protective devices correctly in-
stalled 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) spac-
ing between the picture tube 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 ohmme-
ter lead in turn to each tuner antenna input ex-
posed terminal screw and, if applicable, to the
coaxial connector. If the measured resistance is
less than 1.0 megohm or greater than 5.2 mego-
hm, 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 instru-
ment completely reassembled, plug the AC line
cord directly into a 120V AC outlet. (Do not use an
isolation transformer during this test.) Use a leak-
age current tester or a metering system that com-
plies 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 posi-
tion 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.), es-
pecially any exposed metal parts that offer an elec-
trical return path to the chassis. Any current
measured must not exceed 0.5 milli-ampere. Re-
verse the instrument power cord plug in the outlet
and repeat the test.
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.
e. X-Radiation and High Voltage Limits - Because
the picture tube is the primary potential source of
X-radiation in solid-state TV receivers, it is special-
ly constructed to prohibit X-radiation emissions.
For continued X-radiation protection, the replace-
ment picture tube must be the same type as the
original. Also, because the picture tube shields
and mounting hardware perform an X-radiation
protection function, they must be correctly in place.
High voltage must be measured each time servic-
_
DEVICE
LEAKAGE
CURRENT
TESTER
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
TEST ALL EXPOSED
METAL SURFACES
+
READING SHOULD
NOT BE ABOVE 0.5 mA
EARTH
GROUND
BEING
TESTED

2-2 L6115IMP
ing is performed that involves B+, horizontal de-
flection or high voltage. Correct operation of the X-
radiation protection circuits also must be recon-
firmed each time they are serviced. (X-radiation
protection circuits also may be called "horizontal
disable" or "hold down.") Read and apply the high
voltage limits and, if the chassis is so equipped,
the X-radiation protection circuit specifications giv-
en on instrument labels and in the Product Safety
& X-Radiation Warning note on the service data
chassis schematic. High voltage is maintained
within specified limits by close tolerance safety-re-
lated components/adjustments in the high-voltage
circuit. If high voltage exceeds specified limits,
check each component specified on the chassis
schematic and take corrective action.
2. Read and comply with all caution and safety-relat-
ed notes on or inside the receiver cabinet, on the
receiver chassis, or on the picture tube.
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this TV re-
ceiver. Design alterations and additions, including,
but not limited to circuit modifications and the ad-
dition of items such as auxiliary audio and/or video
output connections, might alter the safety charac-
teristics 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. Picture Tube Implosion Protection Warning -
The picture tube in this receiver employs integral
implosion protection. For continued implosion pro-
tection, replace the picture tube only with one of
the same type number. Do not remove, install, or
otherwise handle the picture tube in any manner
without first putting on shatterproof goggles
equipped with side shields. People not so
equipped must be kept safely away while picture
tubes are handled. Keep the picture tube away
from your body. Do not handle the picture tube by
its neck. Some "in-line" picture tubes are equipped
with a permanently attached deflection yoke; be-
cause of potential hazard, do not try to remove
such "permanently attached" yokes from the pic-
ture tube.
5. Hot Chassis Warning -
a. Some TV receiver chassis are electrically connect-
ed 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 volt-
meter, measure between the chassis and a known
earth ground. If a voltage reading in excess of 1.0V
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 re-
gardless of the AC plug polarity. This chassis can
be safety-serviced only with an isolation transform-
er 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 iso-
lated from the AC power line. The two ground sys-
tems are electrically separated by insulation
material that must not be defeated or altered.
6. Observe original lead dress. Take extra care to as-
sure 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 ther-
mally 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.
7. Components, parts, and/or wiring that appear to
have overheated or are otherwise damaged
should be replaced with components, parts, or wir-
ing that meet original specifications. Additionally,
determine the cause of overheating and/or dam-
age and, if necessary, take corrective action to re-
move any potential safety hazard.
8. Product Safety Notice - Some electrical and me-
chanical parts have special safety-related charac-
teristics which are often not evident from visual
inspection, nor can the protection they give neces-
sarily be obtained by replacing them with compo-
nents rated for higher voltage, wattage, etc.. Parts
that have special safety characteristics are identi-
fied 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 re-
view continuously and new instructions are issued
whenever appropriate. Prior to shipment from the
factory, our products are strictly inspected to con-
firm they comply with the recognized product safe-
ty 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 imple-
ment the following precautions when a set is being
serviced.

2-3 L6115IMP
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 ap-
plying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise block-
ing 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 solder-
ing.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fus-
ible 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 drop-
lets, etc.) do not remain inside the set.
K. Crimp type wire connector
The power transformer uses crimp type connec-
tors which connect the power cord and the primary
side of the transformer. When replacing the trans-
former, follow these steps carefully and precisely
to prevent shock hazards.
Replacement procedure
1) Remove the old connector by cutting the wires at
a point close to the connector.
Important: Do not re-use a connector (discard it).
2) Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
3) Align the lengths of the wires to be connected. In-
sert the wires fully into the connector.
4) Use the crimping tool to crimp the metal sleeve at
the center position. Be sure to crimp fully to the
complete closure of the tool.
L. When connecting or disconnecting the internal
connectors, first, disconnect the AC plug from the
AC supply outlet.

2-4 L6115IMP
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 posi-
tions. Afterwards, perform the following tests and con-
firm 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 sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
Note: This table is unofficial and for reference only. Be
sure to confirm the precise values.
2. Leakage Current Test
Confirm the specified (or lower) leakage current be-
tween 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.
Table 2 : Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Region Clearance
Distance (d), (d')
110 to 130 V USA or
CANADA
≥3.2 mm
(0.126 inches)
Chassis or Secondary Conductor
dd'
Primary Circuit Terminals
Fig. 1
AC Voltmeter
(High Impedance)
Exposed Accessible Part
BEarth Ground
Power Cord Plug Prongs
Z
1.5kΩ0.15µF
Fig. 2
AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:
110 to 130 V USA
0.15µF CAP. & 1.5kΩ
RES. connected in
parallel
i≤0.5mA rms Exposed accessible
parts

3-1 L14STA
STANDARD NOTES FOR SERVICING
Circuit Board Indications
a. The output pin of the 3 pin Regulator ICs is indicat-
ed as shown.
b. For other ICs, pin 1 and every fifth pin are indicat-
ed as shown.
c. The 1st pin of every male connector is indicated as
shown.
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.
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 ma-
chine, then apply hot air to the Flat Pack-IC (about
5 to 6 seconds). (Fig. S-1-1)
(2) Remove the flat pack-IC with tweezers while ap-
plying 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 twee-
zers. (Fig. S-1-6)
Caution:
1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering ma-
chine, 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)
Top View
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
Pb free mark
Fig. S-1-1

3-2 L14STA
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 remov-
ing it.
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)
(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 ma-
chine.(Fig. S-1-4)
(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 twee-
zers. (Fig. S-1-6)
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 con-
tact pads as shown in Fig. S-1-5.
Fig. S-1-2
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape Fig. S-1-3
Flat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-4
Fine Tip
Soldering Iron
Sharp
Pin

3-3 L14STA
(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 twee-
zers. (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.
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 1
on the PCB when positioning for installation. Then
pre- solder 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.
Fig. S-1-5
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-6
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-7
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-8
Presolder
CBA
Flat Pack-IC

3-4 L14STA
Instructions for Handling
Semiconductors
Electrostatic breakdown of the semiconductors may
occur due to a potential difference caused by electro-
static charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is prop-
erly 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 (1MΩ) on the workbench or
other surface, where the semiconductors are to be
placed. Because the static electricity charge on cloth-
ing will not escape through the body grounding band,
be careful to avoid contacting semiconductors with
your clothing.
CBA
<Incorrect>
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
<Correct>
CBA

4-1 L0201DC
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.
2. Disassembly Method
(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 part to be removed, unhooked,
unlocked, released, unplugged, unclamped, or
desoldered.
S=Screw, P=Spring, L=Locking Tab, CN=Connec-
tor, *=Unhook, Unlock, Release, Unplug, or Desol-
der
2(S-2) = two screws (S-2)
(5): Refer to the following Reference Notes in the
Table.
[1] Rear Cabinet
[2] Jack Holder
[3] Main CBA
[4] LCD Main CBA Unit
[5] Function CBA[6] Speaker L
[7] Speaker R [8] Front Cabinet
ID/
LOC.
No. PA RT
REMOVAL
Fig.
No.
REMOVE/
*UNHOOK/UNLOCK/
RELEASE/UNPLUG/
DESOLDER
Note
[1] Rear Cabinet D1
D3
6(S-1), (S-2),
*CN801, *CN802 ---
[2] Jack Holder D2 (S-3), (S-4), (S-5) ---
[3] Main CBA D2
D3
5(S-6), 3(S-7),
*CN101A, *CN102A,
*CN103A, *CN104A,
*CN401, *CN402
---
[4] LCD Main
CBA Unit
D2
D3 7(S-8) ---
[5] Function CBA D2
D3 4(S-9) ---
[6] Speaker L D2
D3 2(S-10) ---
[7] Speaker R D2
D3 2(S-11) ---
[8] Front Cabinet D2 --------------- ---
↓
(1) ↓ (2) ↓ (3) ↓ (4) ↓ (5)

4-2 L0201DC
(S-1)
(S-2)
(S-1)
(S-1)
(S-1)
[1] Rear Cabinet
Fig. D1
(S-5)
(S-7)
(S-7)
(S-7)
(S-6)
(S-6)
(S-8)
(S-8)
(S-8)
(S-8)
(S-8) (S-6)
(S-6)
(S-4)
(S-3)
[2] Jack Holder
[3] Main CBA
[4] LCD Main
CBA Unit
[5] Function CBA
(S-10)
(S-11)
(S-9)
(S-9)
[6] Speaker L
[7] Speaker R
[8] Front Cabinet
Fig. D2

4-3 L0201DC
TV Cable Wiring Diagram
Fig. D3
CN401
CN101A CN102A
CN104A
CN104B
CN801 CN802
To Speaker
To LCD Module Unit
Function CBA
Main CBA
LCD Main CBA
To Speaker
CN103A
CN101B CN102B CN103B
CN402

5-1 L0201EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note:
"CBA" is abbreviation for "Circuit Board Assem-
bly."
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: Part No. N0105UD or N0127UD
3. Color Analyzer
How to make Service remote control unit:
1. Prepare normal remote control unit. (Part No.
N0105UD or N0127UD) Remove 3 Screws from the
back lid. (Fig. 1-1)
2. Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
How to set up the service mode:
Service mode:
1. Use the service remote control unit.
2. Turn the power on. (Use main power on the TV unit.)
3. Press "SLEEP" button on the service remote control
unit. Version of micro computer will be displayed on
the LCD or display. (Ex: 0001-0.21 or 0004GP-0.47)
1. Initial Setting
General
Enter the Service mode.
Set the each initial data as shown on tabel 1 below.
When version of micro computer is 0004GP-0.47, set
the each initial data as shown on table 1 and 2 below.
Table 1: Initial Data
SCREWS
REMOTE CONTROL UNIT Fig. 1-1
J 1
Fig. 1-2
REMOTE CONTROL CBA
ITEM
BUTTON
(on the service
remote control)
DATA
VALUE
BRT
MENU →1
119
CNT 196
CLR-R 70
CLR-B 70
TNT 68
V-TNT 64
SHR 35
S-BRT
MENU →2
119
S-CNT 191
S-CLR-R 70
S-CLR-B 70
S-TNT 64
S-SHR 35
C-BRT
MENU →3
119
C-CNT 191
C-CLR-R 60
C-CLR-B 64
C-TNT 64
C-SHR 35
D2-BRT
MENU →5
119
D2-CNT 191
D2-CLR-R 60
D2-CLR-B 64
D2-TNT 64
D2-SHR 35
D3-BRT
MENU → 6
119
D3-CNT 196
D3-CLR-R 64
D3-CLR-B 64
D3-TNT 64
D3-SHR 35

5-2 L0201EA
Table 2: Initial Data (only 0004GP-0.47)
2. Software Reset
To reset software, press “5” button on the remote con-
trol unit for at least 5 seconds after pressing “CH
RETURN” button on the remote control unit.
3. Flicker Adjustment
When version of micro computer is 0004GP-0.47, the
following adjustment is necessary.
Adjustment Point: VR481 (LCD Main CBA Unit)
Note: Use service remote control unit
1. Enter the Service mode. (See page 5-1)
2. Press “2” button on the remote control unit.
The following screen appears.
3. If Flicker Adjustment is not fit, the screen become the
following.
4. Adjust VR481 so that flash stops.
SAIDO 5128
C-SAIDO 228
H-P 850
C-H-P 50
V-P 940
C-V-P 40
COR(C/D1) VOL p→1512
COG(C/D1) VOL p→2512
COB(C/D1) VOL p→3512
DR(C/D1) VOL p→4128
DG(C/D1) VOL p→5128
DB(C/D1) VOL p→6128
COR(C/D2) VOL p→1512
COG(C/D2) VOL p→2512
COB(C/D2) VOL p→3512
DR(C/D2) VOL p→4128
DG(C/D2) VOL p→5128
DB(C/D2) VOL p→6128
7F
VOL p
FF
LANGUAGE SPA/FRA
STEREO TYPE MTS
ACCESS CODE OFF
BACK LIGHT ON
HD ON
2DVP ES3
HRD OFF
NCM ON
ASPECT OFF
ITEM
BUTTON
(on the service
remote control)
DATA
VALUE
D2-SAIDO 5228
D3-SAIDO 228
NORMAL 074
DARK 150
ITEM
BUTTON
(on the service
remote control)
DATA
VALUE
VR481
LCD Main CBA Unit
FLASH
(Go and Off)

5-3 L0201EA
The following adjustment normally are not
attempted in the field. Only when replacing the
LCD Panel then adjust as a preparation.
4. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Note: Use service remote control unit
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80%).
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 perpendicu-
larly to the LCD Panel surface.
4. Enter the Service mode. Press "VOL p" button on the
service remote control unit and select "C/D" mode.
5-1. When "x" value and "y" value are not within specifica-
tion, adjust "DB(C/D1)" or "DR(C/D1)". Refer to "1.
Initial Setting."
Note: "DB(C/D1)" or "DR(C/D1)" must be adjusted
within ±10.
5-2. When "x" value and "y" value are not within specifica-
tion, adjust "DB(C/D2)" or "DR(C/D2)". Refer to "1.
Initial Setting."
Note: "DB(C/D2)" or "DR(C/D2)" must be adjusted
within ±10.
Test Point Adj. Point Mode Input
Screen CH o/ p
buttons
VIDEO1
VIDEO2
White
Purity
(APL 80%)
M. EQ. Spec.
Pattern Generator,
Color analyzer
x (0.256 to 0.316),
y (0.264 to 0.324)
Figure
Color Analyzer
It carries out in a darkroom.
L = 50 cm
Perpendicularity
INPUT: WHITE 80%
Fig. 2

6-1
BLOCK DIAGRAMS
System Control Block Diagram
L0202BLS
FUNCTION CBA
IC333 (TV MICRO CONTROLLER)
21 22
6
18 17
BACKLIGHT-SW
19 5
BACKLIGHT-ADJ
21 3
P-ON-H16 8
PROTECT-1915
PROTECT-2816 VOLUME15 9
A-MUTE13 11
INPUT-012 12 INPUT-111 13
S-SW717
SCL618 SDA519
RESET RESET
Q151
P-ON+3.3V(D)
BACKLIGHT-SW
BACKLIGHT-ADJ
P-ON-H
PROTECT-1 PROTECT-2
VOLUME
A-MUTE
SDA SCL
INPUT-0 INPUT-1
S-SW
SCL SDA
7
20 35 31 40 19 32 41 42 43 X161
27MHz
XIN
XOUT
TO POWER SUPPLY BLOCK DIAGRAM
TO IF/VIDEO BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM
BACKLIGHT-SW
BACKLIGHT-ADJ
P-ON-H
PROTECT-1 PROTECT-2
VOLUME
A-MUTE
INPUT-0 INPUT-1
S-SW
SCL
SDA
MAIN CBA
TO LCD BACKLIGHT BLOCK DIAGRAM
PROTECT-1
3KEY-IN-118 6
CN102B CN102A
KEY-IN-122
CN104A CN104B
KEY SWITCH
REMOTE
SENSOR
RCV101
RCV-IN44
RCV-IN23 1
11
KEY-IN-1
RCV-IN
4KEY-IN-217 7 KEY-IN-211
KEY-IN-2 AL +3.3V(D)
CN102B CN102A
LCD MAIN CBA UNIT
SDA 2 SCL 1 BUS-OPEN 4
CN105(NO CONNECTION)
IC171 (MEMORY)
SCL 6
SDA 5
7
CS
23
BUS-OPEN
Q102
3.3V<-->5V CONVERTER
+5V
CN105 IS USED FOR ADJUSTMENT AT FACTORY

6-2 L0202BLIF
IF/Video Block Diagram
CF31
TO AUDIO BLOCK DIAGRAM
CN103A TO
LCD BLOCK DIAGRAM CN103B
CVBS1 S-VIDEO-C5 S-VIDEO-Y3
IC11 (IF SIGNAL PROCESS)
INPUT-0(INV) INPUT-1(INV)
SAW FILTER VIF
AMP VIDEO
DET
4.5MHz FILTER
RF AGC LPF
4.5MHz TRAP
16 17 4
TU1
SF11
IF
AGC
SDA
SCL
1
11
5 4
14
SIF
MAIN CBA
VIDEO SIGNAL AUDIO SIGNAL
TO AUDIO BLOCK DIAGRAM
JK706 VIDEO-Y IN JK707 VIDEO-Pb IN JK708 VIDEO-Pr IN
JK703 VIDEO1 IN JK701 S-VIDEO IN
IFAGC DET
EQ AMP
SIF AMP
2 1 7 8
BUFFER
Q709
SDA
TO SYSTEM CONTROL BLOCK DIAGRAM
SCL
S-SW
CY
CN103A TO
LCD BLOCK DIAGRAM CN103B
VIDEO-Y7 VIDEO-Pb9 VIDEO-Pr11
3
IC781 (INPUT SELECT)
5
Q703
4
13 12
Q702
14
1 2
Q701
15
SW CONTROL
10
911
INPUT-0(INV) INPUT-1(INV)
TO SYSTEM CONTROL BLOCK DIAGRAM
Q707 Q708
Q704 Q705
Q706
(TUNER UNIT)
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
SWITCHING
Q31
CF32
6VCO
APC
WF7
WF8
WF9
WF10 WF11 WF12

6-3
Audio Block Diagram
L0202BLA
MAIN CBA
AUDIO SIGNAL
A-MUTE
VOLUME TO
SYSTEM CONTROL BLOCK
INPUT-0(INV) INPUT-1(INV)
SCL SDA
IC852 (INPUT SELECT)
SW CTL
3
11 15 12
4 1
9 10
VCA STEREO
FILTER 75uS
DE-EMPH
dBX DE-EMPH
L+R FILTER
WIDE BAND FILTER WIDE BAND
RMS DET WIDE BAND
EXPAND
SPECTRAL EXPAND SPECTRAL RMS DET
SPECTRAL FILTER
OFFSET CANCEL
L-CH R-CH
MATRIX AGC
OFFSET CANCEL L-R
FILTER (L-R)/SAP
SW
SAP FILTER
I2C DECORDER
SAP DEMOD SAP OUT
FILTER
29 30
TO IF/VIDEO BLOCK DIAGRAM
TUNER
VIDEO2
VIDEO2
TUNER VIDEO2 VIDEO2
(L-CH) (R-CH)
21 27 24
IC851 (MTS/SAP AUDIO SIGNAL PROCESS)
AUDIO1(L) IN JK704
SIF
JK705 AUDIO1(R) IN JK709 AUDIO2(L) IN JK710 AUDIO2(R) IN
OFFSET CANCEL
14
IC801(AUDIO AMP)
7
VOLUME
11
AMP AMP
MUTE /STANDBY CONTROL
6 1
(R-CH) (L-CH)
2
Q802
P-ON-L
Q803
5
RF
TO POWER SUPPLY BLOCK
JK801 HEADPHONE JACK
SP801 SPEAKER R-CH
CN801
SP-R 1
GND 2
SP802 SPEAKER L-CH
CN802 CLN802
CLN801
SP-L 1
GND 2
TO IF/VIDEO BLOCK DIAGRAM
13
2
WF6
+5V