This Simplified Service Manual is issued to add listed models to the Main Service Manual order No. MTNC020618C1
(CT36HX42F) of the DX3P family. A set of schematics, unique settings and a complete parts list are included in this
Manual.
Please file and use this Simplified Service Manual together with Main Service Manual order No. MTNC020618C1.
Chassis
“WARNING! This Service Manualis designed for experiencedrepairtechniciansonlyand is not designed for useby the generalpublic.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”
The service technician is requiredtoreadand follow the “Safety Precautions”and“Important Safety Notice” in this Main Manual.
Copyright 2002by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
®
and distributionis a violation of law.
Page 2
Important safety notice
Special components are used in this television set which are important for safety. These parts are identified on the
schematic diagram by the symboland printed in BOLD TYPE on the replacement part list. It is essential that
these critical parts are replaced with the manufacturer’s specified replacement part to prevent x-ray radiation,
shock, fire or other hazards. Do not modify the original design without the manufacturer’s permission.
Safety precautions
General guidelines
An Isolation transformer should always be used
during the servicing of a receiver whose chassis is not
isolated from AC power line. Use a transformer of
adequate power rating as this protects the technician
from accidents resulting in personal injury from
electrical shocks. It will also protect the receiver from
being damaged by accidental shorting that may occur
during servicing.
When servicing, observe the original lead dress,
especially in the high voltage circuit. Replace all
damaged parts (also parts that show signs of
overheating.)
Alwaysreplaceprotectivedevices,suchas
fishpaper, isolation resistors and capacitors, and
shields afterservicing thereceiver. Useonly
manufacturer’s recommended rating for fuses, circuits
breakers, etc.
High potentials are present when this receiver is
operating. Operation of the receiver without the rear
cover introduces danger for electrical shock. Servicing
should not be performed by anyone who is not
thoroughly familiar with the necessary precautions
when servicing high-voltage equipment.
Extreme care should be practiced when handling the
picture tube. Rough handling may cause it to implode
due to atmospheric pressure. (14.7 lbs per sq. in.). Do
not nick or scratch the glass or subject it to any undue
pressure. When handling, use safety goggles and
heavy gloves for protection. Discharge the picturetube by shorting the anode to chassis ground (not to
the cabinet or to other mounting hardware). When
discharging connect cold ground (i.e. dag ground lead)
to the anode with a well insulated wire or use a
grounding probe.
Avoid prolonged exposure at close range to unshielded
areas of the picture tube to prevent exposure to
x-ray radiation.
The test picture tube used for servicing the chassis at
the bench should incorporate safety glass and
magnetic shielding. The safety glass provide shielding
for the tube viewing area against x-ray radiation as well
as implosion. The magnetic shield limits the x-ray
radiation around the bell of the picture tube in addition
to the restricting magnetic effects. When using a
picture tube test jig for service, ensure that the jig is
capableofhandling50.0kVwithoutcausing
x-ray radiation.
Before returning a serviced receiver to the owner,
the service technician must thoroughly test the unit to
ensure that is completely safe to operate. Do not use a
line isolation transformer when testing.
Leakage current cold check
Unplug the AC cord and connect a jumper between the
two plug prongs.
Measure the resistance between the jumpered AC plug
and expose metallic parts such as screwheads,
antenna terminals, control shafts, etc. If the exposed
metallic part has a return path to the chassis, the
reading should be between 240kΩ and 5.2MΩ. If the
exposed metallic part does not have a return path to
the chassis, the reading should be infinite.
Leakage current hot check (Fig. 1)
Plug the AC cord directly into the AC outlet. Do not use
an isolation transformer during the check.
Connect a 1.5kΩ 10 watt resistor in parallel with a
0.15µF capacitor between an exposed metallic part
and ground. Use earth ground, for example a
water pipe.
Using a DVM with a 1000 ohms/volt sensitivity or
higher, measure the AC potential across the resistor.
Repeat the procedure and measure the voltage
present with all other exposed metallic parts.
Verify that any potential does not exceed 0.75 volt
RMS. A leakage current tester (such a Simpson model
229, Sencore model PR57 or equivalent) may be used
in the above procedure, in which case any current
measure must not exceed 0.5 milliamp. If any
measurement is out of the specified limits, there is a
possibility of a shock hazard and the receiver must be
repaired and rechecked before it is returned to the
customer.
AC VOLTMETER
COLD
WATER
PIPE
(GROUND)
0.15µF
TO INSTRUMENT’S
EXPOSED METAL
PARTS
1500Ω,10 W
Figure 1. Hot check circuit
X-ray radiation
WARNING: The potential source of x-ray radiation in the
TV set is in the high voltage section and the picture tube.
Note:It is important to use an accurate,
calibrated high voltage meter.
Set the brightness, picture, sharpness and color
controls to minimum.
Measure the high voltage. With a 480i signal the high
voltage should be 33.0kV (± 1.0kV) and with a 1080i
signal the high voltage should be 33.0kV (+1.0kV,
-2.0kV). If the upper limit is out of tolerance,immediate
serviceandcorrectionisrequiredtoinsuresafe
operation and to prevent the possibility of premature
component failure.
Horizontal oscillator disable circuit test
This test must be performed as afinal check before the
receiver is returned to the customer. See horizontal
oscillator disablecircuit procedurecheck in
this manual.
-2-
Page 3
Service notes
Note:These components are affixed with glue. Be careful not to break or damage any foil under
the component or at the pins of the ICs when removing. Usually applying heat to the
component for a short time while twisting with tweezers will break the component loose.
Leadless chip component
(surface mount)
Chip components must be replaced with identical chips
due to critical foil track spacing. There are no holes in
the board to mount standard transistors or diodes.
Some chips capacitor or resistor board solder pads
may have holes through the board, however the hole
diameter limits standard resistor replacement to 1/8
watt. Standard capacitor may also be limited for the
same reason. It is recommended that identical
components be used.
Chip resistor have a three digit numerical resistance
code - 1st and 2nd significant digits and a multiplier.
Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper).
Chip capacitors generally do not have the value
indicated on the capacitor. The color of the component
indicates the general range of the capacitance.
Chip transistors are identified by a two letter code. The
first letter indicates the type and the second letter, the
grade of transistor.
Chip diodes have a two letter identification code as per
the code chart and are a dual diode pack with either
common anode or common cathode. Check the parts
list for correct diode number.
Component removal
1. Use solder wick to remove solder from component
end caps or terminal.
2. Without pulling up, carefully twist the component
with tweezers to break the adhesive.
3. Donotreuseremovedleadlessorchip
components since they are subject to stress
fracture during removal.
Chip component installation
1. Put a small amount of solder on the board
soldering pads.
2. Hold the chip component against the soldering
pads with tweezers or with a miniature alligator clip
and apply heat to the pad area with a 30 watt iron
until solder flows. Do not apply heat for more than
3 seconds.
TYPE
Chip components
GRADE
c
SOLDER
CAPS
How to replace Flat-IC
- Required tools -
•Soldering iron•De-solder braids
•Iron wire or small awl •Magnifier
1. Remove the solder from all of the pins of a Flat-IC
by using a de-solder braid.
De-Solder
Flat-IC
2. Put the iron wire under the pins of the Flat-IC and
pull it in the direction indicated while heating the
pins using a soldering iron. A small awl can be
used instead of the iron wire.
Iron
Wire
Pull
Soldering
Iron
Soldering
Iron
3. Remove the solder from all the pads of the Flat-IC
by using a de-solder braid.
Soldering
Iron
De-Solder
Braid
Flat IC
4. Position the new Flat-IC in place (apply the pins of
the Flat-IC to the soldering pads where the pins
need to be soldered). Properly determine the
positions of the soldering pads and pins by
correctly aligning the polarity symbol.
First pin
123.....
5. Solder all pins to the soldering pads using a fine
tipped soldering iron.
Braid
Awl
b
ANODES
MH DIODE
e
TRANSISTOR
COMMON
CATHODE
SOLDER
CAPS
CAPACITOR
1ST DIGIT
RESISTOR
2ND DIGIT
MULTIPLIER
=1600 = 1.6k
Soldering
Solder
iron
6. Check with a magnifier for solder bridge between
the pins or for dry joint between pins and soldering
pads. To remove a solder bridge, use a de-solder
braid as shown in the figure below.
De-Solder
braid
Solder
bridge
Soldering
iron
-3-
Page 4
About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will ref er to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For
service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be
used.
PCBs manufactured using lead free solder will have the “PbF” or a leaf symbolstampedon the
back of PCB.
Caution
• Pb free solder has a higher melting point than standard solder. Typically the melting
point is 50 ~ 70 °F(30~40°C) higher. Please use a high temperature soldering iron
and set it to 700 ± 20 °F(370± 10 °C).
• Pb free solder will tend to splash when heated too high (about 1100 °For600°C).
If you must use Pb solder, please completely remove all of the Pb free solder on the
pins or solder area before applying Pb solder. If this is not practical, be sure to heat the
Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side
for excess solder which may flow onto the opposite side. (see figure below)
remove all of the
excess solder
component
pin
component
slice view
solder
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu
(tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder
canalsobeused.
the solid state devices due to arcing or static discharge,
make certain that all ground wires and CRT DAG wire
are securely connected.
CAUTION: The power supply circuit is above earth
ground and the chassis cannot be polarized. Use an
isolation transformer when servicing the receiver to
avoid damage to the test equipment or to the chassis.
Connect the test equipment to the proper ground
(hot ) or (cold) when servicing, or incorrect
voltages will be measured.
WARNING: This receiver has been designed to meet
or exceed applicable safety and x-ray radiation
protection as specified by government agencies and
independent testing laboratories.
To maintain original product safety design standards
relative to x-ray radiation and shock and fire hazard,
parts indicated with the symbolon the schematic
must be replaced with identical parts. Order parts from
the manufacturer’s parts center using the parts
numbers shown in this service manual, or provide the
chassis number and the part reference number.
For optimum performance and reliability, all other parts
shouldbereplacedwithcomponentsof
identical specification.
Alternative test points
Horizontal oscillator disable circuit
This chassis employs a special circuit to protect
against excessive high voltage and beam current. If, for
any reason, the high voltage and beam current exceed
a predetermined level this protective circuit activates
and detunes the horizontal oscillator that limits the high
voltage. The over-voltage protection circuit is not
adjustable. However, if components indicated by the
symbolon the schematic in either the horizontal
sweep system or the over-voltage protection circuit
itself are changed, the operation of the circuit should be
checked using the following procedure:Equipment
needed to check the disabled circuit:
1. High voltage meter (0- 50kV)
2. Variac or isolation transformer
3. 1k ohm VR
4. DC Ammeter
Preparation
1. Connect receiver to AC 120 Volts. Do not turn ON.
2. Connect HIGH VOLTAGE meter to 2nd anode
(H.V. button).
negative lead.
3. Connect the ammeter serial from the flyback anode
lead to the picture tube anode socket.
4. Prepare HHS jig to be connected between TPD50
and TPD51 on P-Board as shown above.
Note:Use cold ground () for
TPD51 (P5-2)
1kΩ
HOT
GROUND
COLD
GROUND
HHS Jig
IC811
100Ω
TPD50 (P5-1)
(OPTO)
TPD51
(Led cathode)
TP labels are located
on bottom of board
Figure 2. Power supply jig detail (D-Board)
Procedure
:
1. Open connector A17.
2. Turn power ON and apply a white pattern.
3. Set current within 50-100µΑ
by changing the
picture and bright controls.
4. Turn power OFF.
5. Connect HHS jig between TPD50 and TPD51 on
P-Board as shown above (VR should be turn fully
clockwise).
6. Turn power on.
7. Using the variable resistor slowly increase the
current until the horizontal sync frequency abruptly
increases indicating that the horizontal frequency is
just beginning to pull out of sync. Maintain the
current within
50-100µΑby changing the picture
and bright controls
8. Observe the high voltage meter. High voltage
should read less than 38.4kV.
9. Turn power OFF, remove HHS jig, HV meter,
ammeter and connect A17 connector.
10. TurnpowerON.ResetPICTUREand
BRIGHTNESS controls. Confirm B+ 144V±1.5V
with 120V AC applied.
Note:If high voltage is not within the
specified limit the cause must be
determined before the receiver is
returned to the owner.
-6-
TPD50
(Led anode)
Page 7
Receiver feature table
FEATURE\MODELCT-36HL42F/UF/CF
ChassisDX3P
Number of channels181
Menu languageENG/SPAN/FR
Closed captionX
V-Chip (USA/CANADA)X
Picture in Picture PIP2T
2RFX
Remote model numberEUR7603Z30
Picture tubeA90LSW295X
PureFlatPF (4:3)
CombADV 3D Y/C
VMX(DIGITAL)
Color TempX
V/A norm (X=both)X
MTS/SAP/DBXX
Built-in audio power10W x 3
Number of speakers2 w/subwoofer
Bass/Bl/Treble ControlX
AI SoundX
SURROUND/BBEX
A/V in (rear/front)4(3/1)
A/V Prog outX
Component Input2
Audio Out (FAO,VAO)F,V
S-VHS input (rear/front)2/1
EPJ/HPJ/MISCHPJ
Dimensionsmm
(HxWxD)in
Weight (kg/lbs)98/216.05
Power source (V/Hz)120/60
Anode voltage
Video input jack
Audio input jack500mV RMS 47kΩ
891x1094x742
35.07x43.07x29.21
31.0kV
1V
± 1.0kV
75Ω phono jack
p-p
Table 1. Receiver features
Specifications are subject to change without notice or obligation.
Dimensions and weights are approximate.
-7-
Page 8
Board designation
BoardBoard numberDescription
A-BoardTNPH0465Main panel
DG-Board**
L-BoardTNPA2346CRT board
D-BoardTNPH0466High voltage and deflection panel
P-BoardTNPA2344Power supply panel
Since two different versions of DG-boards are available for
the CT-36HL42 models, please check board number printed on the lower
right corner (fig. 3a) when replacing DG-Board. Refer to label on chassis for
EEPROM p art number that is used (see fig. 3b for label location).
Panasonic
Panasonic
TNPA2345
Top side
a)
Figure 3. a)DG-Board number location b)EEPROM label on A-Board below A/V jacks.
Note:The DG-Board (TNPA2345 or TNPA2345AC) is non-serviceable.
If this board is defective replace it with a new one. Each version of
DG-Board must be matched with correct version of EEPROM.
Confirm the EEPROM part number before replacing.
Notice: When ordering any board, add and ” S” after the board suffix
application.
Example: If ordering D-Board, should be ordered as:
b)
TNPH0466
S.
-8-
Page 9
Location of controls (receiver)
A/Vinputsinside
front door
LED
1
2453
Remote control
sensor
Figure 4. Location of controls receiver
Quick reference control operation
1
POWER button - Press to turn ON or OFF.
VOLUME buttons - Press to adjust sound level, or to adjust audio menus, video
2
menus, and select operating features when menus are displayed
CHANNEL buttons - Press to select programmed channels. Press to highlight desired
features when menus are displayed. Also use to select cable converter box channels
3
after programming remote control infrared codes (the TV/AUX/CABLE switch must be
set in CABLE position).
ACTION button - Press to display main menu and access on screen feature and
4
adjustment menus.
TV/VIDEO button - Press to select TV or one of two video inputs, for the main picture
5
or the PIP frame (when PIP frame is displayed).
-9-
Page 10
Remote - location of controls
POWER button
Press to turn ON and OFF.
MUTE button
Press to mute sound.
A second press resumes sound. Press also to
access and delete Closed Caption display.
TV, VCR, DVD, DTV,AUX, CBL,RCVR, DBS
buttons
Component function buttons
VOL (volume) buttons
Press to adjust TV sound level. Use with
channel buttons to navigate in menus.
R-TUNE (rapid tune) button.
Press to switch to theprevious
channel.
ACTION button
Press to display main menu and access or exit
On Screen features and Adjustment Menus.
REW,PLAY, FF, TV/VCR, STOP, PAUSE, REC
& VCR CHANNEL buttons
Component function buttons.
DBS EXIT& DBS GUIDE buttons
DBS function buttons.
LIGHT button
Press to light remote control buttons.
SAP button
Access secondary audio program
ASPECT button
Select picture size (ratio) to match
programmingformat (DTV-STB and DBS only).
PROG button
Press to enter minor number in a compound
number.
MOVE, PIP, SPLIT/SIZE, FREEZE, SWAP,
SEARCH, PIP CHANNEL, PIP MIN, PIP MAX
PIP function buttons.
Figure 5. Location of controls (EUR7603Z30 remote)
For additional information for this remote please refer to the owner’s
manual section remote operation, part number listed on parts list section.
-10-
Page 11
Auto diagnosis feature
This receiver incorporates a new auto-diagnosis
feature. With this new feature will be easier for the
repair technician to detect the failures. There is a LED
located on the A-Board by the DG-Board, this LED will
start flashing when a failure is detected by the circuits
located in a specific area, depending on how many
times the LED is flashing, this will tell you what circuit
should be checked.
After the count:
Proceed to check that area, verify what board is the
problem located, this way the area to check will be
reduced until the failure is found.
Make a count of flashing and see Table 1.
Please use this feature effectively especially for
intermittent problems.
Remove all the screws marked with an arrow()
from the back of the receiver (see Fig. 12):
•4 screws at the top edgeof the receiver.
•3 screw by the A/V jacks.
•1 screw by the RF jacks.
•1 screw at each lower corner of the receiver.
•1 screw by the retainer plate of the AC power cord.
•1 screw at each lower side of the receiver.
•1screw below the A/V jacks
Note:Extensions for board connectors may
beneededtotestvoltageson
P-Board, please see parts list section
for part numbers in this service
manual.
A-Board - Main chassis (see Fig. 14)
The DG-Board is assembled on the main chassis
(A-Board). The A-Board assembly rest on a chassis
tray along with the D-Board.
Slide chassis tray out. Gently lift, tray and pull out.
Disconnect plug connectors; release wire ties and
holders as required for complete chassis removal.
A. A-Board is secured to the chassis tray with five
screws.
B. The D-Board is secured to the chassis tray with
three screws
C. The A-Board is mated to the D-Board by four
flexible connectors: A4, A5, A6 & A7 (D4, D5, D6 &
D7 on the D-Board, respectively). To remove either
boards, unplug the connectors on the A-Board.
Note:Some tie-wraps that secure the wire
dressings may need to be unfastened
for chassis removal.
Insert wire then
pull upwards
Note: To realease the
GND cable from
D13 connector
insert a wire in
both cavities of
connector, then
pullupthe
cable.
Figure 7. D-Board D13 GND connector.
L-Board - CRT output
Plugs into the socket on the CRT neck.
To remove this board, first unplug the board from
the CRT neck, then disconnectL1, L2 and L3
connectors, to disconnect the focus F1(red cable)
& F2 (white cable) cables, pull the tab and release
the cables (see Fig. 8), finally disconnect the
screen cable from the D-Board D16 (screen and
heater).
To reinsert back the cables, remember the original
position of cables, F1 (red cable) goes to A on the
CRT socket and F2 (white cable) goes to B on the
CRT socket.
Figure 8. F1 & F2 cables release
To release screen GND cables from L-Board L11 &
L12 connectors, insert a wire in both sides of connector
and pull upwards the cable, then remove the wire
(see Fig. 9)
Insert wire
Figure 9. L-Board screen GND cables release
Press tab
leftward to
release cables
Pull cables
upwards
Pull cables upwards
DG-Board
Plugs onto the A-Board at the A21, A22 and A23
(DG21, DG22 and DG23 respectively) connectors.
Note:This board is not-serviceable.
When removing this board pull carefully.
P-Board
Plugs onto the right side of the D-Board at D3, D2,
D11 & D12 connectors (P3, P2, P11 & P12 on
P-Board, respectively); First remove the three
screws that holds the metal board, one from the
flyback and two from the chassis tray and then use
a flat head screwdriver to release the connector
locking tabs and pull upwards the board.
-12-
G-Board
Mated to A-Board by three flexible connectors (A1,
A2, A3) and D-Board by one flexible connector
(D40). To remove this board, first unplug the four
flexible connectors, then RT4 and G4 connectors,
then pull upwards the board while unlock the tabs
from the chassis tray.
Page 13
K-Board
Is fastened to the G-Board by two metal brackets that are secured by a screw (each one). Plugs into the front
of G-Board by connector K1 to G6,and is fastened to the chassis tray assembly by 2 screws on each lower
corner.(Fig. 9).
G-Board
K-Board
Figure 10. K-Board toG-Board Assembly (Top View).
Speakers
Each speaker is secured to a plastic base with 4 screws, and each plastic base is secured to a second base
with two screws, and assembled to the cabinet with two screws.
The subwoofer speaker is assembled within the backcover of the television set by 4 screws (Fig. 10).
Screws secured
to back cover
Figure 11. Subwoofer speaker
Note: Be sure to reconnect the speaker wires to the correct speaker lead (+) (-)
THIS S CHEMATIC DIAGRAM INCORPORATES SPECIAL
FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM
X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS.
WHENSERVICINGITISESSENTIALTHATONLY
MANUFACTURERS SPECIFIED PARTS BE USE D FOR THE
CRITICAL COMPONENTS DESIGNATED WITH AIN THE
SCHEMATIC.
SCHEMATIC NOTES
1. Resistors are carbon 1/4W unless noted
otherwise.
2. Capacitors are c eramic 50V unless noted
otherwise.
3. Coil value notes is inductance in µH.
4. Test point indicated by; Test point but no
pin .
5. Components indicated withare c ritical
parts and replacement should be made
with manufacture specified replacement
parts only.
6.(BOLD LINE) indicates the route
of B+ supply.
7. The schematic diagrams are current at
the t ime of printing and ar e subject to
change without notice.
-AC input to the Receiver is 120V.
NTSC (HD, 1125i & 525P when
applicable)signalgeneratoris
connected to the antenna of the
Receiver. (Color bar pattern of 100
IRE white and 7.5 IRE black.)
-All Picture and Audio adjustments are
set to Normalize.
TV ANT/CABLE - (Set-Up Menu) in
TV/ANT Mode
Volume - Min.
TV/Video SW - TV position
Audio Mode - Stereo
-Voltage readings are nominal and
may vary ±10% on active devices.
Some voltage reading will vary
with signal streng th and picture
content.
-Supply voltages are nominal.
2. Ground symbolindicates ground lead
connection of meter.
Incorrect ground connection will result
in erroneous readings.
CAUTION: Incorrect ground connection
of the test equipment will result in
erroneous readings.
CHIP TRANSISTOR
LEAD DE SIGNATION
B
E
used for engineering design
purposes.
C
Notes
3
1.indicateswaveformmeasurement.
(Measurement can be taken at the best
accessible location in common to the
indicated point .)
2. Taken with an NTSC signal generator
connected to the antenna terminal.
(NTSC color bar pattern of 8 bars of EIA
colors, 100 IRE white and 7.5 IRE black.)
3. Customer Controls (Picture/Audio Menu) are
set to Normalize. Volume is set to “MIN”.
WAVEFORM MEASUREMENTS
4. All video and color waveforms are taken
with a wideband scope and a probe
with low capacitance (10 to 1). Shape
andpeakaltitudesmayvary
depending on the type of Oscilloscope
used and its settings.
5. Ground symbolshown on waveform
number indicates (Hot) ground lead
connection of the Oscilloscope.
CAUTION: Incorrect ground connection of
the test equipment will result in erroneous
readings.
Important notice:
Values for components noted in schematics are subject to change without
any notice or obligation, so please check parts list for component value or
part number
- 36 -
Page 37
NotasdeEsquemáticos
NOTA DE SEGURIDAD
LOS DIAGRAMAS ELÉCTRICOS INCLUYEN CARACTERÍSTICAS
ESPECIALES MUY IMPORTANTES PARA LA PROTECCIÓN
CONTRA RAYOS-X, QUEMADURAS Y DESCARGAS ELÉCTRICAS.
CUANDO SE DE SERVICIO ES IMPORTANTE USAR PARA
REEMPLAZO DE COMPONENTES CRITICOS, SOLO PARTES
ESPECIFICADAS POR EL FABRICANTES. LOS COMPONENTES
CRITICOS ESTAN SEÑALADOS EN LOS DIAGRAMAS POR EL
SIMBOLO.
NOTAS DE LOS DIAGRAMAS
1.Las Resistencias son de Car bón de 1/4W,a
menos que se indique otra característica.
2.Los Capacitores son de Cerámica para
50V, a menos que se indique otra
característica.
3.El valor indicado de las Bobinas es la
inductancia expresada en µH.
4.Los puntos de prue ba en la terminal de
algún componente son indicados por Los
puntosdepruebafueradelos
componentes se indican con .
5.Los componentes señalados con el
símbolosonconsiderados
componentes críticos y deben ser
MEDICIÓN DE VOLTAJES
1.Medición de voltaje:
-El voltaje d e entrada al Receptor es de
120VdeCorrienteAlterna.Un
generador de patrones con formato
NTSC se conecta a la entrada de la
antena. (Patrón de Barras de Colores
con 100 IREs para el Blanco y 7.5 IREs
para el Negro.)
-Los ajustes de los Menus Picture y
Audio se normalizan.
EnelMenúSet-Up,enlaopción
ANTENA, se selecciona el modo de
CABLE.
El nivel de Volumen se minimiza.
De los modos TV y Video, seleccionar el
modo TV.
Seleccionar modo Estereo del Audio.
reemplazados sólo con las partes
especificadas por el fabricante.
6.(LINEA GRUESA) indica las
líneas d e alimentación de los Voltajes
B+.
7.Los diagramas eléctricos están sujetos a
cambio sin previo aviso.
8.El símboloindica que es una
conexión a Tierra Caliente y el símbolo
indica conexión a Tierra Fría.
NOTA: Losdemassímbolosde
componentesincluidosson
usados con fines de diseño.
-Las mediciones de los voltajes son
nominales y pueden variar hasta
10%encomponentese n
funcionamiento. Las lecturas de los
voltajes pueden variar por la
potencia de la señal y el contenido
de la imagen.
-Las fuentesde voltajes son
nominales.
2.El símboloindica el tipo de t ierra que
se utiliza en la conexión del medidor.
PRECAUCION: SI no se utiliza la
conexión a la tierra adecuada, se
obtendrán mediciones equivocadas y
podría dañar el equipo de medición.
IDENTIFICACIÓN DE TERMINALES
PARA TRANSISTORES EN
B
E
CHIP
C
MEDICIÓN DE FORMAS DE ONDA
1. Un símbolo comoindicael punto para medir
una señal. (La medición puede hacerse en
el punto con mayor accesibilidad, siempre
que sea común al indicado.)
2. Se midieron utilizando un generador c on
formato NTSC conectado a la terminal de la
antena. (Patrón de 8 Barras de Colores
EAI, formato NTSC de 100 IREs para el
Blanco y 7.5 IREs para el Negro.)
3. Los ajustes de usuario de los Menus
PICTURE y AUDIO se normalizaron.
Posteriormente el nivel de volumen se
ajusta al mínimo.
4. Las formas de onda de Video y Color
fueron tomadas con un osciloscopio de
3
banda alta y con un punta de prueba de
baja capacitancia (10 a 1). La forma y
amplitud de las ondas puede variar
según el tipo de osciloscopio que se
utilice y sus características.
5. El símbolo de tierraque aparece junt o al
número de la forma de onda, indica que
se utiliza conexión a Tierra Caliente en
el extremo negativo de la punta de
prueba.
PRECAUCION: Si no se utiliza la conexión
a la tierra adecuada, se obtendrán
mediciones equivocadas y podría dañar el
equipo de medición.
Aviso importante:
Los valores para componentes anotados en los esquemáticos están sujetos a cambios sin
obligación de previa notificación o aviso, favor de checar la lista de partes para ver valores
de componentes o número de parte.
This Service manual is issued as a service guide for the models of the DX3P family listed above. Included in this
manual are a set of schematics, block diagrams, functional descriptions, alignment procedures, disassembly
procedures, and a complete parts list.
“WARNING! This Service Manualis designed for experiencedrepairtechniciansonlyand is not designed for useby the generalpublic.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”
The service technician is required to read and follow the “Safety Precautions”and“Important Safety Notice” in this Main Manual.
Copyright 2002 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
®
and distributionis a violation of law.
Page 50
Important safety notice
Special components are used in this television set which are important for safety. These parts are identified on the
schematic diagram by the symboland printed in BOLD TYPE on the replacement part list. It is essential that
these critical parts are replaced with the manufacturer’s specified replacement part to prevent x-ray radiation,
shock, fire or other hazards. Do not modify the original design without the manufacturer’s permission.
Safety precautions
General guidelines
An Isolation transformer should always be used
during the servicing of a receiver whose chassis is not
isolated from AC power line. Use a transformer of
adequate power rating as this protects the technician
from accidents resulting in personal injury from
electrical shocks. It will also protect the receiver from
being damaged by accidental shorting that may occur
during servicing.
When servicing, observe the original lead dress,
especially in the high voltage circuit. Replace all
damaged parts (also parts that show signs of
overheating.)
Alwaysreplaceprotectivedevices,suchas
fishpaper, isolation resistors and capacitors, and
shields afterservicingthereceiver. Useonly
manufacturer’s recommended rating for fuses, circuits
breakers, etc.
High potentials are present when this receiver is
operating. Operation of the receiver without the rear
cover introduces danger for electrical shock. Servicing
should not be performed by anyone who is not
thoroughly familiar with the necessary precautions
when servicing high-voltage equipment.
Extreme care should be practiced when handling the
picture tube. Rough handling may cause it to implode
due to atmospheric pressure. (14.7 lbs per sq. in.). Do
not nick or scratch the glass or subject it to any undue
pressure. When handling, use safety goggles and
heavy gloves for protection. Discharge the picturetube by shorting the anode to chassis ground (not to
the cabinet or to other mounting hardware). When
discharging connect cold ground (i.e. dag ground lead)
to the anode with a well insulated wire or use a
grounding probe.
Avoid prolonged exposure at close range to unshielded
areas of the picture tube to prevent exposure to
x-ray radiation.
The test picture tube used for servicing the chassis at
the bench should incorporate safety glass and
magnetic shielding. The safety glass provide shielding
for the tube viewing area against x-ray radiation as well
as implosion. The magnetic shield limits the x-ray
radiation around the bell of the picture tube in addition
to the restricting magnetic effects. When using a
picture tube test jig for service, ensure that the jig is
capableofhandling50.0kVwithoutcausing
x-ray radiation.
Before returning a serviced receiver to the owner,
the service technician must thoroughly test the unit to
ensure that is completely safe to operate. Do not use a
line isolation transformer when testing.
Leakage current cold check
Unplug the AC cord and connect a jumper between the
two plug prongs.
Measure the resistance between the jumpered AC plug
and expose metallic parts such as screwheads,
antenna terminals, control shafts, etc. If the exposed
metallic part has a return path to the chassis, the
reading should be between 240kΩ and 5.2MΩ. If the
exposed metallic part does not have a return path to
the chassis, the reading should be infinite.
Leakage current hot check (Fig. 1)
Plug the AC cord directly into the AC outlet. Do not use
an isolation transformer during the check.
Connect a 1.5kΩ 10 watt resistor in parallel with a
0.15µF capacitor between an exposed metallic part
and ground. Use earth ground, for example a
water pipe.
Using a DVM with a 1000 ohms/volt sensitivity or
higher, measure the AC potential across the resistor.
Repeat the procedure and measure the voltage
present with all other exposed metallic parts.
Verify that any potential does not exceed 0.75 volt
RMS. A leakage current tester (such a Simpson model
229, Sencore model PR57 or equivalent) may be used
in the above procedure, in which case any current
measure must not exceed 0.5 milliamp. If any
measurement is out of the specified limits, there is a
possibility of a shock hazard and the receiver must be
repaired and rechecked before it is returned to the
customer.
AC VOLTMETER
COLD
WATER
PIPE
(GROUND)
0.15µF
TO INSTRUMENT’S
EXPOSED METAL
PARTS
1500Ω,10 W
Figure 1. Hot check circuit
X-ray radiation
WARNING: The potential source of x-ray radiation in the
TV set is in the high voltage section and the picture tube.
Note:It is important to use an accurate,
calibrated high voltage meter.
Set the brightness, picture, sharpness and color
controls to minimum.
Measure the high voltage. With a 480i signal the high
voltage should be 33.0kV (± 1.0kV) and with a 1080i
signal the high voltage should be 33.0kV (+1.0kV,
-2.0kV). If the upper limit is out of tolerance,immediate
serviceandcorrectionisrequiredtoinsuresafe
operation and to prevent the possibility of premature
component failure.
Horizontal oscillator disable circuit test
This test must be performed as afinal check before the
receiver is returned to the customer. See horizontal
oscillator disablecircuit procedurecheck in
this manual.
-2-
Page 51
Service notes
Note:These components are affixed with glue. Be careful not to break or damage any foil under
the component or at the pins of the ICs when removing. Usually applying heat to the
component for a short time while twisting with tweezers will break the component loose.
Leadless chip component
(surface mount)
Chip components must be replaced with identical chips
due to critical foil track spacing. There are no holes in
the board to mount standard transistors or diodes.
Some chips capacitor or resistor board solder pads
may have holes through the board, however the hole
diameter limits standard resistor replacement to 1/8
watt. Standard capacitor may also be limited for the
same reason. It is recommended that identical
components be used.
Chip resistor have a three digit numerical resistance
code - 1st and 2nd significant digits and a multiplier.
Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper).
Chip capacitors generally do not have the value
indicated on the capacitor. The color of the component
indicates the general range of the capacitance.
Chip transistors are identified by a two letter code. The
first letter indicates the type and the second letter, the
grade of transistor.
Chip diodes have a two letter identification code as per
the code chart and are a dual diode pack with either
common anode or common cathode. Check the parts
list for correct diode number.
Component removal
1. Use solder wick to remove solder from component
end caps or terminal.
2. Without pulling up, carefully twist the component
with tweezers to break the adhesive.
3. Donotreuseremovedleadlessorchip
components since they are subject to stress
fracture during removal.
Chip component installation
1. Put a small amount of solder on the board
soldering pads.
2. Hold the chip component against the soldering
pads with tweezers or with a miniature alligator clip
and apply heat to the pad area with a 30 watt iron
until solder flows. Do not apply heat for more than
3 seconds.
TYPE
Chip components
GRADE
c
SOLDER
CAPS
How to replace Flat-IC
- Required tools -
•Soldering iron•De-solder braids
•Iron wire or small awl •Magnifier
1. Remove the solder from all of the pins of a Flat-IC
by using a de-solder braid.
De-Solder
Flat-IC
2. Put the iron wire under the pins of the Flat-IC and
pull it in the direction indicated while heating the
pins using a soldering iron. A small awl can be
used instead of the iron wire.
Iron
Wire
Pull
Soldering
Iron
Soldering
Iron
3. Remove the solder from all the pads of the Flat-IC
by using a de-solder braid.
Soldering
Iron
De-Solder
Braid
Flat IC
4. Position the new Flat-IC in place (apply the pins of
the Flat-IC to the soldering pads where the pins
need to be soldered). Properly determine the
positions of the soldering pads and pins by
correctly aligning the polarity symbol.
First pin
123.....
5. Solder all pins to the soldering pads using a fine
tipped soldering iron.
Braid
Awl
b
ANODES
MH DIODE
e
TRANSISTOR
COMMON
CATHODE
SOLDER
CAPS
CAPACITOR
1ST DIGIT
RESISTOR
2ND DIGIT
MULTIPLIER
=1600 = 1.6k
Soldering
Solder
iron
6. Check with a magnifier for solder bridge between
the pins or for dry joint between pins and soldering
pads. To remove a solder bridge, use a de-solder
braid as shown in the figure below.
De-Solder
braid
Solder
bridge
Soldering
iron
-3-
Page 52
About lead free solder (PbF)
component
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For
service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be
used.
PCBs manufactured using lead free solder will have the “PbF” or a leaf symbolstampedon the
back of PCB.
Caution
• Pb free solder has a higher melting point than standard solder. Typically the melting
point is 50 ~ 70 °F(30~40°C) higher. Please use a high temperature soldering iron
and set it to 700 ± 20 °F(370± 10 °C).
• Pb free solder will tend to splash when heated too high (about 1100 °For600°C).
If you must use Pb solder, please completely remove all of the Pb free solder on the
pins or solder area before applying Pb solder. If this is not practical, be sure to heat the
Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side
for excess solder which may flow onto the opposite side. (see figure below)
component
remove all of the
excess solder
pin
slice view
solder
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu
(tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder
canalsobeused.
Identification of components . . . . . . .......54
Partslist ..............................60
Schematics, voltages & waveforms
A-Board schematic & voltages. . . . . . . . 76
D-Board schematic & voltages . . . . . . . 72
A-Boardwaves ...................88
D-Boardwaves...................89
DG-Boardschematic...............90
G-Boardschematic................98
D,L&P-Boardvoltages ...........101
L-Boardschematic................102
P-Boardschematic ...............104
A-Boardlayout...................108
D-Boardlayout...................110
DG-Boardlayout.................112
G-Boardlayout ..................116
L-Boardlayout...................118
P-Boardlayout...................119
Partslistabbreviations..................72
Foldoutsnotes.........................74
-6-
Page 55
Service notes (continued)
IMPORTANT: To protect against possible damage to
the solid state devices due to arcing or static discharge,
make certain that all ground wires and CRT DAG wire
are securely connected.
CAUTION: The power supply circuit is above earth
ground and the chassis cannot be polarized. Use an
isolation transformer when servicing the receiver to
avoid damage to the test equipment or to the chassis.
Connect the test equipment to the proper ground
(hot) or (cold) when servicing, or incorrect
voltages will be measured.
WARNING: This receiver has been designed to meet
or exceed applicable safety and x-ray radiation
protection as specified by government agencies and
independent testing laboratories.
To maintain original product safety design standards
relative to x-ray radiation and shock and fire hazard,
parts indicated with the symbolon the schematic
must be replaced with identical parts. Order parts from
the manufacturer’s parts center using the parts
numbers shown in this service manual, or provide the
chassis number and the part reference number.
For optimum performance and reliability, all other parts
shouldbereplacedwithcomponentsof
identical specification.
Alternative test points
Horizontal oscillator disable circuit
This chassis employs a special circuit to protect
against excessive high voltage and beam current. If, for
any reason, the high voltage and beam current exceed
a predetermined level this protective circuit activates
and detunes the horizontal oscillator that limits the high
voltage. The over-voltage protection circuit is not
adjustable. However, if components indicated by the
symbolon the schematic in either the horizontal
sweep system or the over-voltage protection circuit
itself are changed, the operation of the circuit should be
checked using the following procedure:
Equipment needed to check the disabled circuit:
1. High voltage meter (0- 50kV)
2. Variac or isolation transformer
3. 1k ohm VR
4. DC Ammeter
Preparation
1. Connect receiver to AC 120 Volts. Do not turn ON.
2. Connect HIGH VOLTAGE meter to 2nd anode
(H.V. button).
negative lead.
3. Connect the ammeter serial from the flyback anode
lead to the picture tube anode socket.
4. Prepare HHS jig to be connected between TPD50
and TPD51 on P-Board as shown above.
Note:Use cold ground () for
TPD51 (P5-2)
1kΩ
HOT
GROUND
COLD
GROUND
HHS Jig
IC811
100Ω
TPD50 (P5-1)
(OPTO)
TPD51
(Led cathode)
TP labels are located
on bottom of board
Figure 2. Power supply jig detail (D-Board)
Procedure
:
1. Open connector A17.
2. Turn power ON and apply a white pattern.
3. Set current within 50-100µΑ
by changing the
picture and bright controls.
4. Turn power OFF.
5. Connect HHS jig between TPD50 and TPD51 on
P-Board as shown above (VR should be turn fully
clockwise).
6. Turn power on.
7. Using the variable resistor slowly increase the
current until the horizontal sync frequency abruptly
increases indicating that the horizontal frequency is
just beginning to pull out of sync. Maintain the
current within
50-100µΑby changing the picture
and bright controls
8. Observe the high voltage meter. High voltage
should read less than 38.4kV.
9. Turn power OFF, remove HHS jig, HV meter,
ammeter and connect A17 connector.
10. TurnpowerON.ResetPICTUREand
BRIGHTNESS controls. Confirm B+ 144V±1.5V
with 120V AC applied.
Note:If high voltage is not within the
specified limit the cause must be
determined before the receiver is
returned to the owner.
TPD50
(Led anode)
-7-
Page 56
Receiver feature table
FEATURE\MODELCT-32HX42F/UFCT-36HX42F/UF
ChassisDX3P
Number of channels181
Menu languageENG/ESP/FR
Closed captionX
V-Chip (USA/CANADA)X
Picture in Picture PIP2T
2RFX
Remote model numberEUR7613Z40
Picture tubeM80LSW295XA90LSW295X
FlatF(4:3)
CombADV 3D Y/C
NEW Y NRX----
VMX(DIGITAL)
Color tempX
V/A norm (X=both)X
MTS/SAP/DBXX
Built-in audio power15W x 2
Number of speakers2
Bass/Bl/TrebleControlX
AI SoundX
SURROUND/BBEX
A/V in (rear/front)4(3/1)
A/V Prog outX
Component Input2
Audio Out (FAO,VAO)F,V
S-VHS input (rear/front)2/1
EPJ/HPJ/MISCHPJ
Dimensionsmm
(HxWxD)in
Weight (kg/lbs)74.8/164.5698.5/216.7
Power source (V/Hz)120/60
Anode voltage
Video input jack
Audio input jack500mV RMS 47kΩ
667.3x810x568
26.52x32.4x22.72
31.0kV
1V
p-p
747x936x610.5
29.88x37.44x24.42
± 1.0kV
75Ω phono jack
Table 1. Receiverfeatures
Specifications are subject to change without notice or obligation.
Dimensions and weights are approximate.
-8-
Page 57
Board designation
BoardBoard numberDescription
A-BoardTNPH0465Main panel
DG-BoardTNPA2345Digital video board, PIP processing,
L-BoardTNPA2346CRT board
D-BoardTNPH0466High voltage and deflection panel
P-BoardTNPA2344Power supply panel
G-BoardTNP2AA113AAKey board panel
Note:The DG-Board (TNPA2345) is non-serviceable. If this board is
defective replace it with a new one and take back the defective
board to the service center.
Notice: When ordering any board, add and ” S” after the board
suffix application.
Example: If ordering D-Board, should be ordered as:
TNPH0466
S.
-9-
Page 58
Location of controls (receiver)
POWER
1
1
2
3
4
Remote control
sensor
VOLUME
2453
CHANNELACTION TV/VIDEO
Controls inside
front door
Figure 3. Location of controls receiver
Quick reference control operation
POWER button - Press to turn ON or OFF.
VOLUME buttons - Press to adjust sound level, or to adjust audio menus, video
menus, and select operating features when menus are displayed
CHANNEL buttons - Press to select programmed channels. Press to highlight desired
features when menus are displayed. Also use to select cable converter box channels
after programming remote control infrared codes (the TV/AUX/CABLE switch must be
set in CABLE position).
ACTION button - Press to display main menu and access on screen feature and
adjustment menus.
TV/VIDEO button - Press to select TV or one of two video inputs, for the main picture
5
or the PIP frame (when PIP frame is displayed).
-10-
Page 59
Remote-locationofcontrols
POWER button
Press to turn ON and OFF.
MUTE button
Press to mute sound.
A second press resumes sound.
Press also to access and delete
Closed Caption display.
TV, VCR, DVD, CBS/CBL
Component function buttons
VOL (volume) buttons
Press to adjust TV sound level.
Use with channel buttons to
navigate in menus.
R-TUNE (rapid tune) button.
Press to switch to theprevious
channel.
ACTION button
Press to displaymain menu andaccess or
Component function buttons.
DBS EXIT& DBS GUIDE buttons
DBS function buttons.
LIGHT button
Press to light remote control buttons.
SAP
Access second audio program
ASPECT
NotefectiveonTVmode
MOVE, PIP, SPLIT/SIZE, FREEZE, SWAP,
SEARCH, PIP CHANNEL
PIP function buttons
Figure 4. Location of controls (EUR7613Z40 remote)
For additional information for this remote please refer to the owner’s
manual section remote operation, part number listed on parts list section.
Remove all the screws marked with an arrow()
from the back of the receiver (see Fig. 10)
Note:Screw configuration, type, and number
of screws vary depending on the
model of the receiver serviced and the
application;variousmodelsare
covered in this manual. Use same
hardwarewhenreassemblingthe
receiver.
•4 screws at the top edgeof the receiver.
•4 screw by the A/V jacks.
•1 screw by the antenna jacks.
•1 screw by the
•1 screw at the lower part of TV.
•1 screw at each lower corner of the receiver.
•1 screw by the retainer plate of the AC power cord.
•1 screw by the A.C. cord assembly .
Note:Extensions for board connectors may
A-Board - Main chassis (see Fig. 73)
The DG-Board is assembled on the main chassis
(A-Board). The A-Board assembly rest on a chassis
tray along with the D-Board.
Slide chassis tray out. Gently lift, tray and pull out.
Disconnect plug connectors; release wire ties and
holders as required for complete chassis removal.
A. A-Board is secured to the chassis tray with five
screws.
B. The D-Board is secured to the chassis tray with
three screws
C. The A-Board is mated to the D-Board by four
flexible connectors: A4, A5, A6 & A7 (D4, D5, D6 &
D7 on the D-Board, respectively). To remove either
boards, unplug the connectors on the A-Board.
Note:Some tie-wraps that secure the wire
Insert wire then
pull upwards
Figure 6. D-Board D13 GND connector.
dolby center CH input.
beneededtotakevoltages on
P-Board, please see parts list section
for part numbers in thisservice
manual.
dressings may need to be unfastened
for chassis removal.
Note: To realease the
GND cable from
D13 connector
insert a wire in
both cavities of
connector, then
pull the cable.
L-Board - CRT output
Plugs into the socket on the CRT neck.
To remove this board, first unplug the board from
the CRT neck, then disconnectL1, L2 and L3
connectors, to disconnect the focus F1(red cable)
& F2 (white cable) cables, pull the tab and release
the cables (see Fig. 7), finally disconnect the
screen cable from the D-Board D16 (screen and
heater).
To reinsert back the cables, remember the original
position of cables, F1 (red cable) goes to A on the
CRT socket and F2 (white cable) goes to B on the
CRT socket.
Figure 7. F1 & F2 cables release
To release screen GND cables from L-Board L11 &
L12 connectors, insert a wire in both sides of connector
and pull upwards the cable, then remove the wire
(see Fig. 8)
Insert wire
Figure 8. L-Board screen GND cables release
Press tab
leftward to
release cables
Pull cables
upwards
Pull cables upwards
DG-Board
Plugs onto the A-Board at the A21, A22 and A23
(DG21, DG22 and DG23 respectively) connectors.
Note:This board is not-serviceable.
When removing this board pull carefully.
P-Board
Plugs onto the right side of the D-Board at D3, D2,
D11 & D12 connectors (P3, P2, P11 & P12 on
P-Board, respectively); First remove the three
screws that holds the metal board, one from the
flyback and two from the chassis tray and then use
a flat head screwdriver to release the connector
locking tabs and pull upwards the board.
G-Board
Mated to A-Board by three flexible connectors (A1,
A2, A3) and D-Board by one flexible connector
(D40). To remove this board, first unplug the four
flexible connectors, then RT4 and G4 connectors,
then pull upwards the board while unlock the tabs
from the chassis tray.
-13-
Page 62
Speakers
Each speaker is secured to a plastic base with
4 screws, and each plastic base is secured to a
second base with two screws, and secured to the
cabinet with two screws.
Note:Be sure to reconnectthe speaker
wires to the correct speaker lead (+) (-)
Disassembly for CRT replacement
1. Discharge the CRT as instructed in the safety
precautions (see page 2) and remove 2nd anode
button from the CRT.
2. Remove speaker modules (R & L)
3. Perform complete removal of chassis, as instructed
in disassembly for service.
Note:When remounting the CRT, reuse the
metal sheet located in the lower part of
the cabinet holding the CRT, hold with
screws to the cabinet. This metal
sheet is not supplied with the CRT
replacement.
CRT replacement
1. Perform disassembly for CRT replacement
procedure.
2. Insure that the CRT H.V. Anode button is
discharged before handling the CRT. Read the
safety precautions (see page 2) on handling the
picture tube.
3. Remove the components from the CRT neck and
place the cabinet face down on a soft pad.
4. Note the original order for the CRT mounting
hardware as they are remove from the CRT
mountingbrackets at each corner of the CRT.
5. Remove the CRT with the degaussing coil and the
dag ground braid attached.
Note:To remove the four brackets holding
the degauss coil from the corners of
the CRT, first remove the CRT from
the cabinet, then remove the brackets
by pressing the tab on the bracket and
pull upwards. These brackets are
included in the degauss coil kit,for part
number, please see parts list section
(see Fig. 9).
6. Note the original locations and mounting of the
degaussing coil and the dag ground assembly to
insure proper reinstallation on the replacement
CRT.
To remove and remount the degaussing coil:
The degaussing coil is held in place by clampers
fastened to the CRT corner ears. These clampers
must be installed onto the replacement CRT prior
to mounting the degaussing coil.
To remove and remount the dag ground braid:
a.Unhook the coil spring from the bottom corners
of the CRT ears.
b.Release the braid loop from the upper corners of
the CRT ears.
7. Mount the dag ground braid on the replacement
CRT. Position the degaussing coil with new ties.
Dress coil as was on the original CRT.
8. Replace the components on CRT neck and
reinstall into cabinet. Verify that all ground wires
and circuit board plugs get connected.
Note:Reuse all the clampers and mounting
brackets from the degauss coil and
screen, and when remounting the
degausscoilassurethatisnot
touching the speakers, this can be
donebyplacingsometape
(see Fig. 9), this may cause mask
vibration. The mounting brackets and
clampers are not supplied with the
replacements.
Important notice:
When ordering the CRT, please order CRT
and CRT kit also. Please see parts list
section for part numbers
Degauss
coil
bracket
Degauss
coil
Press tab
then pull
upwards
Figure 9. Brackets removal
-14-
Page 63
Back cover removal
4screws
at the top edge
1 screw
at the lower corner
1 screw by
the antenna
jacks
1 short
screw
1 screw
at the lower corner
4 screws
1screws
Figure 10. Back cover removal.
-15-
Page 64
Chassis service adjustment procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or
associated components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground (see electric diagrams). Use Q801’s (P-Board)
heat sink when the HOT ground symbol () is used. Otherwise, use COLD ground () — tuner shield
A-BOARD
IC804
A1
IC875IC872
T
D40
D4
IC433
IC located on
bottom of board
D-BOARD
RL451
U
N
E
R
All TPs are located on
bottom of boards
D503
IC451
T
U
Q551
N
E
R
TP
18
D2
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (FA1 to FA2)
140.0V B+ voltage check
1. Set the BRIGHT and PICTURE to minimum by
using the PICTURE menu.
2. Connect the DVM on TPD144 (D-Board) and cold
ground ().
3. Confirm that B+ voltage is 144.0V ± 1.5V.This
voltage supplies B+ to the horizontal output &
Adjustment is necessary only if the CRT or the
deflection yoke is replaced or if the setting was
disturbed. The complete procedure consists of:
1. Vertical raster shift adjustment.
2. Initial static convergence.
3. Setting the purity.
4. Final static convergence.
WhentheCRTortheyokeisreplaced
Place the yoke on the CRT neck (do not tighten
the clamp).
o’clock (90
Fig. 11 and Fig. 12)
R&B&G Convergence Rings
Place the vertical raster shift tabs at 3
o
from the purity and convergence tabs (See
R&B Convergence Rings
G3G4
Vertical Raster Shift Ring
Purity Rings Centered
Over G3/G4 Gap
Figure 1 1. Description of rings
Center line
from pattern
Mechanical
Center Marks
Vertical raster shift tabs
Open the
same angle
from center
Figure 13. Verticalraster sh if t adjustment
Initial center static convergence
Connect a dot/cross hatch generator to the receiver
and tune in a signal. Observe misconvergence at
center of the screen only.
Adjust the R&B pole magnets; by separating tabs and
rotating to converge blue with red.
Adjust the R&B and R&B&G pole magnets: by
separatingtabsandrotatingtoconvergeblueandred
(magenta) with green.
Note: Precise convergence at this point is
not important.
R&B&G Convergence Rings
R&B Convergence Rings
Vertical Raster
Shift Rings
Purity Rings
90
o
Figure 12. initial positioning of rings
Turn the receiver ON. Operate the receiver for 60
minutes using the first purity check field (white screen)
to stabilize the CRT.
Fully degauss the receiver by using an external
degaussing coil.
Slide the deflection yoke back and forth on the neck of
the CRT until it produces a near white, uniform raster.
Vertical raster shift adjustment
Apply a green pattern with a horizontal line, adjust the
Deflection Yoke so that has no tilt, then secure it.
Adjust center line of the pattern with the mechanical
center of the CRT, this center is determined by two
marks at the side edges of the screen. To adjust the
line, once the vertical raster shift tabs are place at 3
o’clock to reduce its magnetic field effect (see Fig. 11 )
open the tabs the same angle from the center, until the
center line of the pattern becomes a straight line,
centered with the marks of the CRT.
(see Fig. 12)
Important notice:
Rings come along with deflection
yoke in one piece.
Purity adjustment
When the receiver is in the serviceman mode for
making electronic adjustments, press the RECALL
button on theremote control to enter purity check. (See
theserviceadjustmentselectroniccontrols
procedure).
Operate the receiver for 60 minutes using the first
purity check field (white screen) to stabilize the CRT.
Fully degauss the receiver by using an external
degaussing coil.
Press the RECALL button on the remote control again
until the purity check (green screen) appears.
Loosen the deflection yoke clamp screw and move the
deflection yoke back as close to the purity magnet
as possible.
Adjust the purity rings to set the vertical green raster
precisely at the center of the screen (see Fig. 14).
NOTES:
1. CRT warm up with white screen
(three guns activated) is needed
to stabilize the shadow mask
expansion.
2. Initial center static convergence
(roughly centers three gun
beams) is required in order to
performpurityadjustment.
Figure 14. Green raster adjustment
Slowly move the deflection yoke forward until the best
overall green screen is displayed.
Tighten the deflection yoke clamp screw.
Press the RECALL button on the remote control again
until the purity check blue and red screens appear and
observe that goodpurity is obtained on each respective
field.
Press the RECALL button on the remote control again
until purity check (white screen) appears. Observe the
screen for uniform white. If purity has not been
achieved, repeat the above procedure.
Green Raster
-17-
Page 66
Final convergence procedure
Note: Vertical size and focus adjustments must be
completedprior toperforming theconvergence
adjustment. Connect a dot pattern generator to the
receiver. The brightness level should not be higher
than necessary to obtain a clear pattern.
Converge the red and the blue dots at the center of the
screen by rotating the R&B pole static convergence
magnets.
Align the converged red/blue dots with the green dots
at the center of the screen by rotating the R&B&G pole
static convergence magnets. Melt wax with soldering
iron to reseal the magnets.
Slightly tilt vertically and horizontally (do not rotate) the
deflection yoke to obtain a good overall convergence.
If convergence is not reached at the edges, insert
permalloy in the DY corners to achieve proper
convergence (Refer to A-Board picture on page 19)
Recheck for purity and readjust if necessary.
After vertical adjustment of the yoke, insert wedge at 11
o’clockposition,thenmakethehorizontal
tilt adjustment.
Secure the deflection yoke by inserting four side
wedges.
Apply adhesive between tab (thin portion) of wedge
and CRT and place tape over the tab to secure to the
CRT.
Dynamic corvergence adjustment
Use this for a precisely overall convergence adjust at
the edges.
DY(Y
HC,YV,XV) Adjustment
Y
V Adjustment
(VR1 for Horizontal dynamic convergence)
1. Apply a crosshatch pattern.
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver adjust VR1 (located in deflection yoke
board Fig. 21) to obtain a proper corvergence at
top and bottom of the screen (see Fig. 15)
B&R
G
B&R
G
H Adjustment
Y
(VR2 for ve rtical dynamic convergence)
1. Apply a crosshatch pattern.
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver Adjust VR2 (located in deflection yoke
board Fig. 21) to obtain a proper corvergence at
left and right side of the screen. (See Fig. 16)
B&R
B&R
B&R
G
G
B&R
G
G
Figure 16. VR2 Adjustment (YH)
XV Adjustment (precise adjustment)
1. Apply a crosshatch pattern.
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver adjust the coil located in deflection
yoke board to obtain a proper convergence
horizontally.
Thisstripisusedinsomesetstomatchtheyokeand
CRT for optimum convergence. If the yoke or CRT is
replaced, the strip may not be required.
First converge the set without the strip and observe
the corners.
If correction is needed:
1. Place strip between CRT and yoke, in quadrant
needing correction. Slowly move it around for
desired results.
2. Press adhesive tightly to the CRT and secure
with tape.
DAF adjustment
(Dynamic focus adjustment)
The purpose of this adjustment is to move the focus in
the picture, so the focus is in balance in the whole
picture (same level). Perform this adjustment as a
visual adjustment, centering both waveforms, repeat
adjustment until best adjustment is obtained.
Preparation:
1. Picture settings normalized.
2. Picture mode set to VIVID.
Procedure:
1. Apply a crosshatch pattern.
2. Connect channel one of the oscilloscope with
100x1 probe to DAF OUT on J172 (D-Board).
3. Connect channel two of the oscilloscope with 10x1
probe to KG (L-Board).
4. If the the points A and B are different adjust, in
service mode, adjust (HDAFS)DATA so that
become the same position. (See Fig. 18)
5. Apply a 1080i crosshatch pattern and repeat from
step1tostep4.
Note:Both waveforms should be centered.
Upper waveform could be different
depending on the pattern applied.
Other Method (DAF adjustment)
Preparation:
1. Picture settings normalized.
2. Picture mode set to VIVID.
Procedure:
1. Apply a crosshatch pattern.
2. Put a mark in the focus control (on fly-back), so the
control can be put back in the original position.
3. Turn the focus control (fly-back) fully, so the image
is out focus.
4. Then in service mode adjust (HDAFS) DATA, so
the focus is moving from side to side in the picture.
5. Adjust (HDAFS)DA TA so the picture looks in
balance in left and right.
6. Turn focus (fly-back) control back to its original
position.
7. Apply a 1080i crosshatch pattern and repeat from
step1tostep6.
vertically, the rasters
producedbythe
outside guns rotate in
opposite directions.
Figure 19. Vertical yoke movement
Raster produced from one of the
outside electron beams
Raster from the other side electron
RGB
beam
Static convergence magnets are set for
center convergence
Astheyokeistiltedhorizontally,one
raster gets larger while the other gets
smaller
Figure 20. Horizontal yoke movement
2Poles(VRSAdj)
4Poles
6 Poles
2 Poles (purity)
For adjustment
of DY (Y
dynamic convergence
Figure 21. Convergence magnets and wedges location
HC/YV/XV)
-20-
Page 69
Service mode (electronic controls)
This receiver has electronic technology using the I²C
bus concept. It performs as a control function and it
replacesmanymechanicalcontrols. Insteadof
adjusting mechanical controls individually, many of the
control functions are now performed by using “on
screen display menu”. (The service adjustment
mode).
Note:It is suggested that the technician
readsallthewaythroughand
understand the following procedure for
entering/exitingtheserviceadjustment mode; then proceed with
theinstructionsworkingwiththe
receiver. When becoming familiar with
the procedure, the flow chart for
servicemodemaybeusedasaquick
guide.
Quick entry to service mode:
When minor adjustments need to be done to the
electronic controls, the method of entering the service
mode without removal of the cabinet back is as follows
using the remote control:
1. Select SET-UP icon and select CABLEmode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press “ACTION” twice to exit menus.
4. Tune to the channel 124.
5. Adjust VOLUME to minimum (0).
6. Press VOL(decrease) on receiver.Red“CHK”
appears in upper corner.+
480IHX480PWX
4:3
MODE
MTSIN SEPAL
MTS
CLOCK
CLOCK
COLOR
VIDEO
B-Y_G
BRT
SUBY DRV
HDEF
H LIN
PCCHG
TOPG
TRAP
V RAS
VDEF
HDAFS
DAF
OTHER
VMM_G VMM_P HHSEW_SW
1080I
16:9
DW
SEPAH
BRIGHT
TINT
CUT R
CUT G
R DR
B DR
UVDRV
H POS
H WID
PCCLG PCCHS
TOPSL
BTMG
SIDEHTRAP
PARA
V-CV-S
VEAMP
VDAFG
CONT
CUT B
PCC
PCCLS
BTMSL
Figure 22. Service mode menu adjustments.
Note:Some adjustments are available only
in some modes (480i, 480p, 1080i); it
is needed to apply the format. A 1080i,
480p, 480i pattern can be obtained
from Panasonic’s TU-DST51 set-top
box DTV decoder.
Exiting the service mode:
This TV goes out from service mode when it is
unplugged or turned OFF. To exit the service mode,
turn the TV OFF or unplug the TV from AC.
Other method
PressACTION andPOWERonthereceiver
simultaneously for at least 2 seconds.
The receiver momentarily shuts off; then comes back
on tuned to channel 3 with a preset level of sound.
Any programmed channels, channels caption data and
some others user defined settings will be erased when
exited by pressing ACTION and POWERon receiver.
IMPORTANT NOTE:
Always check that the TV exits the
service mode.
Note: After receiver is set into service mode,
set TIMER back to NO.
To toggle between aging and service
modes:
While the “CHK” is displayed on the left top corner
of the CRT, pressing “ACTION” and “VOL” UP on
the TV simultaneously will toggle between the
modes. Red “CHK” for service and yellow “CHK” for
aging.
7. Press POWER on the remote control to display
the service adjustment modes menu, select
adjustment by pressing the volume right/left
buttons and channel up/down buttons on the
remote and ACTION to enter the adjustment.
To check colors:
Press RECALL on the remote control when in service
mode (red “CHK” is displayed) to enter the purity field
check mode.
NORMAL
SCREEN
Press RECALL again to select desired field.
BLUE
SCREEN
GRN.
SCREEN
RED
SCREEN
Figure 23. Purity check field mode.
Helpful Hints
Entering service mode (open-back method)
•While the receiver is connected and operating in
normal mode, momentarily short test point
FA1(A15pin2)to cold ground () (A-Board).
The receiver enters the aging mode
Yellow letters “CHK” appear in the upper left corner of
the screen.
-21-
(The VOLUME up/down will adjust rapidly).
WHITE
SCREEN
.
Page 70
Table of the service adjustment item available for each format
9. Adjust “R DR” and “B DR” so the white seems like
white and black like black
10. Apply a normal signal and confirm that the image is
normal and a good gray scale
11. If correction is needed perform minor touch-up
method.
Note:This adjustment (NTSC) will adjust
automatically 480p and 1080i formats,
no need to adjust for this formats
170V±2VDC
0V DC
Figure 33. KG Waveform cathode waveform.
(ground)
Complete adjustment
Preparation:
1. Turn the receiver “ON” and allow 30 minutes warm
up at WHITE PATTERN.
2. Apply a color bar pattern (no color).
3. Turn the SCREEN control (part of FBT T551) fully
counterclockwise.
4. Preset the following service DACs for best results:
• BRIGH .......................1D0
• CUTR........................000
• CUTG ...................... .180
• CUTB........................000
• RDR......................... .80
• BDR..........................80
• PICTURE SETTINGS. . . .NORMALIZED
• PICTUREMODE..............VIVID
Procedure:
1. Connect the oscilloscope to KG (CRT-Board).
2. In service mode for making electronic adjustment,
select “BRIGH” DAC.
-36-
Page 85
Service adjustments (electronic controls, cont.)
Deflection adjustments
To reset deflection adjustments
To reset deflection adjustments to factory adjusted
default, enter to service mode (with red CHK
displayed), press POWER button on remote to
display the service menu, then press and hold
RECALL button for at least three seconds, a reset
message will appear in the image.
Use this feature when deflection adjustment gets
off adjustment to the point that it cannot be
adjusted back easily.
Note:Deflection adjustment for 480i/480p,
480i/480p 16:9 and 480i/480p split,
1080iletterandsplitmodeare
provided differently.
(480i/480p)
H-Center adjustment
Preparation:
1. Apply a crosshatch pattern.
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. If horizontal linearity is poor, in service mode,
adjust data “H LIN” (see Fig. 34)
Figure 34. H-Adjustment
2. Apply a pattern to center the picture.
3. If the horizontal center is not aligned, in service
mode adjust “H POS” DATA to adjust the horizontal
center of the monoscope pattern to the CRT
center.
2. Adjust linearity data “V-C” so that interval of “a” is
same as “b” (a=b). (See Fig. 35)
a=b
a
b
Figure35.Linearityadjustment
3. If the v-position is not at the CRT center, adjust
V position “V RAS” DATA again.
4. Adjust H-TRAPEZOID data “HTRAP” so that the
upper and lower lines becomes horizontal.
(480i/480p)
V-S, V-Size adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter to service mode
2. Check a and b sizes, If b-a < -1.5mm (in top &
bottom extending case)
a. Increase “V-S” DATA by one step .
b. Adjust “VEAMP” so that V-SIZE is regular size
again.
Note:Repeat “a” and “b” untilb-a
3. Check a and b sizes, If b-a > -1.5mm (in top &
bottom shortening case)
a. Decrease “V-S” by one step.
b. Adjust “VEAMP” so that v-size is regular size
again.
Note:Repeat “a” and “b” untilb-a
3. Confirm to make outermost circle of monoscope
pattern a correct circle.
± 1.5mm
± 1.5mm
(480i/480p)
Vertical linearity(V-C), V-Size and
V-Position adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select DAC adjustment
“V-RAS” and adjust crosshatch pattern to center
vertical position to the CRT center.
a
b
Figure 36. V-Adjustment
-37-
Page 86
(480i/480p)
Trapezoid adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “TRAP” and adjust
DATAso that lines at right and left are vertical like a
solid line (see Fig. 37)
(480i/480p)
PCC adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Confirm that trapezoid adjustment is done.
2. Adjust “PCC” DATA so that the 1stline and 3rd line
make a good balance (see Fig. 40).
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 37. Trapezoid adjustment
(480i/480p)
Parallelogram adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “PARA” and adjust so
that the lines at right and left are vertical like solid
line. (see Fig. 38)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 38. Parallelogram adjustment
(480i/480p)
E-W PCC balance adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “SIDE” and adjust so
that lines at right and left are vertical like solid line.
(see Fig. 39)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 40. PCC adjustment
Note:If side and lower side is imbalanced,
adjust “PCCHG” and “PCCLG” so that
“PCC” make good balance.
(480i/480p)
Corner PCC adjustment
Preparation:
1. Apply a crosshatch pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. To adjust upper and lower linearity.
2. Adjust “TOPG” to straighten upper lines
(See Fig. 41)
Min. Adjustment
Correct Adjustment
Figure 41. Top adjustment
3. Adjust “BTMG” to straighten lower lines
(see Fig. 42)
Min. Adjustment
Correct Adjustment
Figure 42. Bottom adjustment
Max. Adjustment
Max. Adjustment
Min. Adjustment
Figure 39. SIDE adjustment
Correct Adjustment
Note:If TOP-BOTTOM bending point is not
so good, adjust “TOPSL” and “BTMSL”
of slice level.
Max. Adjustment
-38-
Page 87
(480i/480p)
H-Size adjustment
Preparation:
1. Use a pattern that permits centering the image
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Adjust “H WID” DATA so that left width and right
become in good balance (not too wide or narrow).
(480i/480p 16:9 and 480i/480p split)
Vertical linearity(V-C) and V-Position
adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select DAC adjustment
“V-RAS” and adjust crosshatch pattern to center
vertical position to the CRT center.
2. Adjust linearity data “V-C” so that interval of “a” is
same as “b” (a=b). (See Fig. 35)
a=b
a
(480i/480p 16:9 and 480i/480p split)
V-S, V-Size adjustment
Preparation:
1. Apply a 480p pattern
2. Setmodeto16x9inset-upmenu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter to service mode
2. Adjust “VAMP” so that width C and D becomes
60mm for 32” and 70mm for 36”
3. Check a and b sizes, If b-a < -1.5mm (in top and
bottom extending case)
a. Increase “V-S” DATA by one step .
b. Adjust “VEAMP” so that width C and D
becomes 60mm for 32” and 70mm for 36”.
Note:Repeat untilb-a
3. Check a and b sizes, If b-a > -1.5mm (in top &
bottom shortening case)
a. Decrease “V-S” by one step.
b. Adjust “VEAMP” so that width C and D
becomes 60mm for 32” and 70mm for 36”
Note:Repeat “a” and “b” untilb-a
1.5mm
a
.
± 1.5mm
±
C
b
Figure 43. Linearity adjustment
b
D
Figure 44. V-Adjustment
(480i/480p 16:9 and 480i/480p split)
H-Trapezoid adjustment
Preparation:
1. Apply a 480p pattern
2. Setmodeto16x9inset-upmenu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “HTRAP” and adjust
DATA so that upper an lower edges become
horizontal (c=c’ and d=d’) (See Fig. 37)
c
c’
-39-
d
Figure 45. H-Trapezoid adjustment
d’
Page 88
(480i/480p 16:9 and 480i/480p split)
Trapezoid adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “TRAP” and adjust
DATAso that lines at right and left are vertical like a
solid line (see Fig. 37)
(480i/480p 16:9 and 480i/480p split)
PCC adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Confirm that trapezoid adjustment is done.
2. Adjust “PCC” DATA so that the 1stline and 3rd line
make a good balance (see Fig. 49).
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 46. Trapezoid adjustment
(480i/480p 16:9 and 480i/480p split)
Parallelogram adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “PARA” and adjust so
that the lines at right and left are vertical like solid
line. (see Fig. 38)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 47. Parallelogram adjustment
(480i/480p 16:9 and 480i/480p split)
E-W PCC balance adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “SIDE” and adjust so
that lines at right and left are vertical like solid line.
(see Fig. 39)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 49. PCC adjustment
Note:If side and lower side is imbalanced,
adjust “PCCHG” and “PCCLG” so that
“PCC” make good balance.
(480i/480p 16:9 and 480i/480p split)
Corner PCC adjustment
Preparation:
1. Apply a 480p pattern
2. Set mode to 16x9in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. To adjust upper and lower linearity.
2. Adjust “TOPG” to straighten upper lines
(See Fig. 41)
Min. Adjustment
Correct Adjustment
Figure 50. Top adjustment
3. Adjust “BTMG” to straighten lower lines
(see Fig. 42)
Min. Adjustment
Correct Adjustment
Figure 51. Bottom adjustment
Note:If TOP-BOTTOM bending point is not
so good, adjust “TOPSL” and “BTMSL”
of slice level.
Max. Adjustment
Max. Adjustment
Min. Adjustment
Figure 48. SIDE adjustment
Correct Adjustment
Max. Adjustment
-40-
Page 89
1080i letter and split)
H-Center adjustment
Preparation:
1. Apply a 1080i pattern.
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. If horizontal linearity is poor, in service mode,
adjust data “H LIN” (see Fig. 34)
Figure 52. H-Adjustment
2. Apply a pattern to center the picture.
3. If the horizontal center is not aligned, in service
mode adjust “H POS” DATA to adjust the horizontal
center of the monoscope pattern to the CRT
center.
(1080i letter and split)
V-S, V-Size adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter to service mode
2. Adjust “VAMP” so that width C and D becomes
60mm for 32” and 70mm for 36”
3. Check a and b sizes, If b-a < -1.5mm (in top and
bottom extending case)
a. Increase “V-S” DATA by one step .
b. Adjust “VEAMP” so that width C and D
becomes 60mm for 32” and 70mm for 36”.
Note:Repeat untilb-a
3. Check a and b sizes, If b-a > -1.5mm (in top &
bottom shortening case)
a. Decrease “V-S” by one step.
b. Adjust “VEAMP” so that width C and D
becomes 60mm for 32” and 70mm for 36”
Note:Repeat “a” and “b” untilb-a
1.5mm.
a
± 1.5mm
±
C
(1080i letter and split)
Vertical linearity(V-C) and V-Position
adjustment
Preparation:
1. Apply a 1080i pattern.
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select DAC adjustment
“V-RAS” and adjust pattern to center vertical
position to the CRT center.
2. Adjust linearity data “V-C” so that interval of “a” is
same as “b” (a=b). (See Fig. 35)
a=b
a
b
Figure 53. Linearity adjustment
3. If the v-position is not at the CRT center, adjust
again.
b
D
Figure 54. V-Adjustment
(1080i letter and split)
Trapezoid adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “TRAP” and adjust
DATAso that lines at right and left are vertical like a
solidline(seeFig.37)
Min. Adjustment
Correct Adjustment
Max. Adjustment
-41-
Figure 55. Trapezoid adjustment
Page 90
(1080i letter and split)
Parallelogram adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “PARA” and adjust so
that the lines at right and left are vertical like solid
line. (see Fig. 38)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 56. Parallelogram adjustment
(1080i letter and split)
PCC adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Confirm that trapezoid adjustment is done.
2. Adjust “PCC” DATA so that the 1st line and 3rd line
makeagoodbalance(seeFig.57).
3. Adjust “BTMG” to straighten lower lines
(see Fig. 42)
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 59. Bottom adjustment
Note:If TOP-BOTTOM bending point is not
so good, adjust “TOPSL” and “BTMSL”
of slice level.
(1080i letter and split)
E-W PCC adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. Confirm that trapezoid adjustment is done.
2. Adjust “SIDE” DATA so that the lines at left and
right become vertical (see Fig. 60).
Min. Adjustment
Figure 60. SIDE adjustment
Correct Adjustment
Max. Adjustment
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 57. PCC adjustment
Note:If upper and lower side is unbalanced,
adjust “PCCHG” and “PCCLG” so that
“PCC” make good balance.
(1080i letter and split)
Corner PCC adjustment
Preparation:
1. Apply a 1080i pattern
2. Normalize the picture settings.
3. Set picture mode to VIVID
Procedure:
1. To adjust upper and lower linearity.
2. Adjust “TOPG” to straighten upper lines
(see Fig. 41)
Min. Adjustment
Figure 58. Top adjustment
Correct Adjustment
Max. Adjustment
(1080i letter and split)
H-Width adjustment
Preparation:
1. Use a pattern that permits centering the image
2. Apply a 1080i pattern
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Adjust “H WID” DATA so that left width and right
become in good balance (not too wide or narrow).
(1080i full)
H-Size, V-SIZE adjustment
Preparation:
1. Use a pattern that permits centering the image
2. Apply a 1080i pattern
3. Setmodeto4x3inset-upmenu
4. Normalize the picture settings.
5. Set picture mode to VIVID
Procedure:
1. Adjust “H WID” and “HPOS” DA TA so that left width
and right become in good balance (not too wide or
narrow and centered).
2. Adjust “VEAMP” and “VRAS” DATA so that upper h
and lower become in good balance (not too wide or
narrow and centered)
-42-
Page 91
(1080i full)
Vertical linearity(V-C) and V-Position
adjustment
Preparation:
1. Use a pattern that permits centering the image
2. Apply a 1080i pattern
3. Setmodeto4x3inset-upmenu
4. Normalize the picture settings.
5. Set picture mode to VIVID
Procedure:
1. Enter service mode, select DAC adjustment
“VRAS” and adjust pattern to center vertical
position to the CRT center.
2. Adjust linearity data “V-C” so that interval of “a” is
same as “b” (a=b). (See Fig. 35)
a=b
a
b
Note:Repeat “a” and “b” untilb-a
±
1.5mm.
a
b
Figure 62. V-Adjustment
(1080i full)
Trapezoid adjustment
Preparation:
1. Apply a 1080i pattern
2. Set mode to 4x3 in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “TRAP” and adjust
DATAso that lines at right and left are vertical like a
solidline(seeFig.37)
Figure 61. Linearity adjustment
3. If the v-position is not at the CRT center, adjust
again.
(1080i full)
V-S, V-Size adjustment
Preparation:
1. Use a pattern that permits centering the image
2. Apply a 1080i pattern
3. Setmodeto4x3inset-upmenu
4. Normalize the picture settings.
5. Set picture mode to VIVID
Procedure:
1. Enter to service mode
2. Adjust “VAMP” to correct vertical size.
3. Check a and b sizes, If b-a < -1.5mm (in top and
bottom extending case)
a. Increase“V-S”DATAbyonestep.
b. Adjust “VEAMP” to correct vertical size.
Note:Repeat untilb-a
3. Check a and b sizes, If b-a > -1.5mm (in top &
bottom shortening case)
a. Decrease “V-S” by one step.
b. Adjust “VEAMP” to correct vertical size
± 1.5mm
Min. Adjustment
Figure 63. Trapezoid adjustment
Correct Adjustment
Max. Adjustment
(1080i full)
Parallelogram adjustment
Preparation:
1. Apply a 1080i pattern
2. Set mode to 4x3 in set-up menu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Enter service mode, select “PARA” and adjust so
that the lines at right and left are vertical like solid
line. (see Fig. 38)
Min. Adjustment
Figure 64. Parallelogram adjustment
Correct Adjustment
Max. Adjustment
-43-
Page 92
(1080i full)
E-W PCC adjustment
Preparation:
1. Apply a 1080i pattern
2. Setmodeto4x3inset-upmenu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. Confirm that trapezoid adjustment is done.
2. Adjust “SIDE” DATA so that the lines at left and
right become vertical (see Fig. 65).
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 65. SIDE adjustment
(1080i full)
Corner PCC adjustment
Preparation:
1. Apply a 1080i pattern
2. Setmodeto4x3inset-upmenu
3. Normalize the picture settings.
4. Set picture mode to VIVID
Procedure:
1. To adjust upper and lower linearity.
2. Adjust “TOPG” to straighten upper lines
(see Fig. 41)
Min. Adjustment
Correct Adjustment
Figure 66. Top adjustment
3. Adjust “BTMG” to straighten lower lines
(see Fig. 42)
Max. Adjustment
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 67. Bottom adjustment
Note:If TOP-BOTTOM bending point is not
so good, adjust “TOPSL” and “BTMSL”
of slice level.
-44-
Page 93
Service adjustments (electronic controls, cont.)
MTS circuit adjustments
The MTS circuit adjus tments require two steps:
1. Input level adjustment.
2. Stereo separation adjustment.
Input level adjustment
Service DAC adjustment (MTSIN)
Preparation:
1. Connect an RMS meter with filter jig as shown in
Fig. 68.
RMS
METER
10k
TPA19
4700p
Figure 68. Filter jig
2. Connect an RF signal generator to the RF
antenna input.
Procedure:
1. Apply the following signal from the RF signal
generator:
Video: 100 IRE flat field, 30% modulation.
Audio:300Hz,100%modulation,monaural
(70 ±5dB, 75Ω OPEN, P/S 10dB). Make sure that
the 75µspre-emphasisisOFF.
2. Adjust the MTS input level adjustment “MTSIN”
datauntiltheRMSvoltagemeasuredis
106 ± 6.0mVrms.
Note:After setting 30% modulation with P.L.
SW and N.R. SW OFF, turn P.L. SW
and N.R. SW ON.
5. Adjust the MTS High-level separation adjustment
“SEPAH” until the amplitude displayed on the
scope is minimum.
6. Repeat above steps 2 through 5 until the amplitude
is at minimum for both signals.
Clock adjustment (CLOCK)
Preparation:
Connect the frequency counter from TP96
(A23 pin 21) to cold ground ().
Note:Frequency counter probe capacitance
should be 8pF or less.
Procedure:
1. Turn the receiver “OFF” with the AC power applied.
2. Measure TP96 (A23 pin 21) for the frequency of
the waveform and record the reading.
Note:TP96
3. Turn the receiver back “ON”.
4. Place the receiver into service mode for making
electronic adjustment, select the clock adjustment
DAC “CLOCK”.
5. Calculate andset“CLOCK” based on the
following formula:
(A23 pin 21)
measurement must
have at least four digits of resolution
following the decimal point. Example:
000.0000
Stereo separation adjustment (SEPAH)
Preparation:
1. Connect an RF signal generator to the RF
antenna input.
2. Connect a scope to TPA20.
Procedure:
1. Select stereo mode in audio menu
2. Apply the following signal from the RF signal
generator:
Video: 100 IRE flat field, 30% modulation.
Audio: 300Hz, 30% modulation, stereo (left only)
(70±5dB, 75Ω OPEN, P/S 10dB).
Note:After setting 30% modulation with P.L.
SW and N.R. SW OFF, turn P.L. SW
and N.R. SW ON.
3. In service mode, adjust the MTS Low-Level
separation adjustment “SEPAL” data until the
amplitudedisplayed on the scope is minimum.
4. ApplythefollowingsignalfromtheRF
signal generator:
Connect the DVM (digital voltage meter) (+) lead to
connector D10 pin-2 or TPQ27; and (-) lead to
connector D10 pin-4.
Procedure:
1. Apply a black pattern.
2. Adjust R524 on D-Board so that the voltage on
connector D10 pin-2 or TPQ27 is 1.8±0.1V on
D-Board.
Focus (part of T551)
Preparation:
Apply a crosshatch pattern with dots.
Procedure:
1. Adjust the FOCUS control to obtain the sharpest
and clearest dot pattern.
a. F1 focus control adjusts vertically.
b. F2 focus control adjusts horizontally.
c. Use this two controls to adjust focus, until best
overall picture is obtained
-46-
Page 95
R
Front
AV4
Input 1
L
Audiosignalpathblockdiagram
L
SPEAKER
G-BOARD
7
L OUT
12
R OUT
R
SPEAKER
6
-
+
R OUT
7
5
IC2352
VAO Amp
3
-
+
L OUT
1
2
IC2302
Audio Amp
Q2334
IC2451
MUTE
INPUT
BBE
L IN
4
9V
9V
Q2452
12
L OUT
L IN
5
R IN
2
Q2452
21
R OUT
R IN
28
6
Q2335
MUTE
-
+
Q2313
DG-BOARD
MUTE
5V
25
ON/OFF
SPEAKER
Q4004
IC001
Q2314
MPU
C BUS
2
I
44
AUDIO
L-VAO
R-VAO
52
54
2325
L OUT
R OUT
IC3003
A/V SWITCH
9
2
4
11
61
16
18
29
31
59
R
62
64
2122
14
MTS
IC2201
L
Tuner 1
A-BOARD
L
L
YUV 2
Input 2
R
Rear
L
YUV 1
Input 1
-47-
L
L
R
AV3
Rear
Input 5
R
Rear
AV2
Input 4
R
Rear
AV1
Input 3
R
Rear
Figure 69. Audio signal path block diagram.
Page 96
Video-Chroma signal path block diagram
CRT
VM COIL
IC4525
16M SGRAM
ANALOG Y
IC4506
IC4507
A/D
10 Bit
5M FIFO MEM
DATA IN/OUT
DIGITAL Y
DATA IN/OUT
YUV IN
IC4518
SUB GLOBAL CORE
Y IN/OUT
IC4511
MAIN GLOBAL CORE
MAIN
Y, PB, PR
L-BOARD
SIGNAL PROCESSING
YUV OUT
UV IN/OUT
SIGNAL PROCESSING
IC4802
VIDEO SWITCH
A11->L1
C BUS
2
I
C BUS
2
I
VM
AMPLIFIER
CIRCUITRY
1
VM SIGNAL
SUB
Y, PB, PR
RED
8
R AMP
IC3801
3
3
RGB CUTOFF,
RDRIVE, BDRIVE
MAIN Y
CIRCUITRY
CC & V-CHIP
SUB Y
GREEN
8
IC3802
G AMP
3
4
VM
11
DG2->A22
RGB SIGNAL
BLUE
8
B AMP
IC3803
3
5
RGB
975
IC4515
IC4529
RGB
DRIVER
OSD
PROCESSING
MPU
IC4002
C BUS
2
I
SIGNAL
RGB OUTPUT
OSD
RGB
YS,YM
RGB OSD
A-BOARD
DG-BOARD
2325271719
A21->DG1
PB1
DTVY1
Y
PB
Rear
Input
YUV1
TO IC3003
8
PR1
PR
DTVY2
Y
Rear
PB
PB2
Input
21
PR2
PR
YUV2
10
12
NTSC_VY1C1NTSC_VY2
56
44
58
Y1 OUT
Y2 OUT
C1 OUT
V6
TV
60
63
TV2
TV1V
Tuner 2
SW
Tuner 1
2RF
14
C2
47
C2 OUT
Y1
17
Rear
C1
19
Input
MPU
FROM
Front
C4
26
Input
V4
V4
V
V4
22
Y In DCOut
Out
36
49
53
G-BOARD
C BUS
2
I
IC3003
A/V SWITCH
Rear
V3
V2
C2
19
V2
V2
Input
Y4
1
15
24
V3
V3
Rear
Input
V1
Y2
15
17
V1
V1
Figure 70. Video-Chroma signal path block diagram.