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.
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-
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-
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)
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-
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-
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-
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-
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.
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 (+) (-)