SERVICE HINTS.......................................................................................................................................................................3
ADJUSTMENT PROCEDURE AND SELF-CHECK ..................................................................................................................5
PARTS LOCATION.................................................................................................................................................................12
REPLACEMENT PARTS LIST................................................................................................................................................13
1. It is advisable to insert an isolation transformer in the
AC supply before servicing a hot chassis.
2. When servicing, observe the original lead dress in the
high voltage circuits. If a short circuit is found, replace
all parts that have been overheated or damaged by
the short circuit.
3. After servicing, see that all the protective devices
such as insulation barriers, insulation papers, shields
and isolation R-C combinations are correctly
installed.
4. When the receiver is not being used for a long period
of time, unplug the power cord from the AC outlet.
5. Potentials as high as 29,5kV {29,2kV} are present
when this receiver is in operation. Operation of the
receiver without the rear cover involves the danger of
a shock hazard from the receiver power supply.
Servicing should not be attempted by anyone who is
not familiar with the precautions necessary when
working on high voltage equipment. Always
discharge the anode of the tube.
6. After servicing make the following leakage current
checks to prevent the customer from being exposed
to shock hazard.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between
the two prongs of the plug.
2. Turn on the receiver’s power switch.
3. Measure the resistance value with an ohmmeter,
between the jumpered AC plug and each exposed
metallic cabinet part on the receiver, such as screw
heads, aerials, connectors, control shafts etc. When
the exposed metallic part has a return path to the
chassis, the reading should be between 4M ohm and
20M ohm. When the exposed metal does not have a
return path to the chassis, the reading must be
infinite.
LEAKAGE CURRENT HOT CHECK
1. Plug the AC cord directly into the AC outlet. Do not
use an isolation transformer for this check.
2. Connect a 2kΩ 10W resistor in series with an
exposed metallic part on the receiver and an earth,
such as a water pipe.
3. Use an AC voltmeter with high impedance to
measure the potential across the resistor.
4. Check each exposed metallic part and check the
voltage at each point.
5. Reverse the AC plug at the outlet and repeat each of
the above measurements.
6. The potential at any point should not exceed
1.4 Vrms. In case a measurement is outside the limits
specified, there is a possibility of a shock hazard, and
the receiver should be repaired and rechecked before
it is returned to the customer.
HOT CHECK CIRCUIT
A.C. VOLTMETER
2kΩ 10 Watts
TO INSTRUMENT’S EXPOSED
METALLIC PARTS
Fig. 1.
X-RADIATION WARNING
1. The potential sources of X-Radiation in TV sets are
the high voltage section and the picture tube.
2. When using a picture tube test jig for service, ensure
that the jig is capable of handling 29,5kV without
causing X-Radiation.
NOTE: It is important to use an accurate periodically
calibrated high voltage meter.
1. Set the brightness to minimum.
2. Measure the high voltage. The meter should
indicate :- 28,5kV ± 1kV {28,2kV ± 1kV}.
If the meter indication is out of tolerance, immediate
service and correction is required to prevent the
possibility of premature component failure.
3. To prevent any X-Radiation possibility, it is essential
to use the specified tube.
WATER PIPE
(
EARTH)
2
Page 5
SERVICE HINTS
How to remove the rear cover
1. Remove the 12 screws as shown in Fig.2.
LOCATION OF CONTROLS
SCREWS
Fig.2.
Focus
N - Board
E - Board
H - Board
Screen
Y - Board
Fig.3.
3
Page 6
ADJUSTMENT PROCEDURE
The remote control is used for entering and storing adjustments, with the exception of Cut-off adjustments, which must
always be done prior to service adjustment. Perform adjustments in accordance with screen display. The display on the
screen also specifies the software version as well as the approx. setting values. The adjustment sequence for the service
mode is indicated below.
1. Set the Bass to maximum position, set the Treble to
minimum position, press the F button followed by the
volume down button on the customer controls at the
front of the TV and at the same time press the
"INDEX" button on the remote control, this will place
the TV into the Service Mode.
NOTE: This TV also has the option of using a Memory Pack which enables you to copy the preset TV channels into the
Memory Pack and then download them onto this or any other EURO-4 TV set.
2. Press the RED / GREEN buttons to step up / down
through the functions.
3. Press the YELLOW / BLUE buttons to alter the
function values.
4. Press the STR button after each adjustment has
been made to store the required values.
5. To exit the Service Mode, press the "N" button.
TV to Memory Pack process
1. Plug the memory pack into the AV1 21 pin terminal at
the back of the TV and switch the TV on.
2. Go into Service Mode as explained above.
The screen will show :-
Program
External>>TV
3. Press the BLUE button on the remote control.
The screen will show :-
Program
TV>>External
4. Press the STR button on the TV.
The screen will show :-
Please Wait
5. All the tuning information stored inside the TV will
now be transferred to the Memory Pack. This process
will take 2-3 minutes to complete and when finished
the screen will show :-
Complete
Memory Pack to TV process
1. Plug the memory pack into the AV1 21 pin terminal at
the back of the TV and switch the TV on.
2. Go into Service Mode as explained above.
The screen will show :-
Program
External>>TV
3. Press the STR button on the TV.
The screen will show :-
Please Wait
4. All the tuning information stored inside the Memory
Pack will now be transferred to the TV. This process
will take 2-3 minutes to complete and when finished
the screen will show :-
Complete
5. The tuning information from the Memory Pack has
now been copied into the TV.
6. To exit from the Service Mode press the "N" button.
7. The process has now been completed and the
Memory Pack can now be removed.
ERRORS
If an error occurs while using the Memory Pack the TV will detect this and the screen will show :-
Error !!
Error !!
If this happens then press the "N" button and repeat the process that was being used. If the errors continue to occur then
check the connectors between the TV and the memory pack and check the 9V battery inside the memory pack.
4
Page 7
ADJUSTMENT PROCEDURE
Item / PreparationAdjustments
+B SET-UP
1. Receive a Greyscale signal.
2. Set the controls :BrightnessMinimum
ContrastMinimum
VolumeMinimum
1. Set the +B voltage up as follows:Adjust R811 so that B2 shows 148V±1V.
To adjust Cutoff connect an oscilloscope to the Blue
cathode, adjust "cutoff" value using the "Yellow" and "Blue"
buttons until the black level is 160V±5V press "STR" to store
the value. Remove the oscilloscope.
Select Ug2 adjustment and adjust the screen VR until the
display shows "O.K."
SELF CHECK
Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To get into the Self-Check mode
press the down (-/v) button on the customer controls at the front of the set, at the same time pressing the STATUS button on
the remote control, and the screen will show :-
VDPO.K.
TUNO.K.
E2O.K.
MSPO.K.
--
OPTION 139
OPTION 20C
PCBO.K.
CabO.K.
Sum
Factory use only
OPTION 31F
OPTION 400
OPTION 5EF
OPTION 625
If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".
Service Aids
To aid in the service of our current chassis there are a number of Service Aids which have been made available.
•LUCI interface kit (Linked Utility Computer Interface)
Part number: TZS6EZ002
This contains interface and cables for connecting TV service connector and a PC as well as diagnostic software. As new
models are introduced upgrade software will become available.
•VICI (Visual Interactive Computer Information)
These C.D.'s contain multimedia documentation providing quick access to service information.
Part No. TZS7EZ006 & TZS7EZ005
1. Service Manuals
2. Instruction Books
3. Technical Information
•TASMIN (Technically Advanced Systemfor Multimedia Interactive Notes)
As well as providing a first step towards more interactive training this product also achieves quick access to Technical
Information.
5
Page 8
Vert Out
IC601 Pin 31
WAVEFORM PATTERN TABLE
Vert Drive
IC451 Pin 2
VFLB
IC451 Pin 3
0.7V
H - Out
IC601 Pin 50
3V
HFLB
IC601 Pin 13
6.2V
20mS
64µS
64µS
57V
H - Out
IC701 Pin 5
30mV
HFLB
IC701 Pin 8
1.5V
20mS
64µS
64µS
1V
20mS
H - Pulse
Base Q503
2V
64µS
Video Out
IC601 Pin 59
2V
64µS
R - Out
IC601 Pin 37
275mV
R - Out
E8 Pin 5
4.6V
SCL
IC1201 Pin 3
3.7V
64µS
64µS
G - Out
IC601 Pin 38
275mV
G - Out
E8 Pin 3
4.4V
SVM Out
IC601 Pin 34
88mV
64µS
64µS
B - Out
IC601 Pin 39
275mV
64µS
B - Out
E8 Pin 4
4.6V
64µS
13µS
64µS
6
Page 9
ALIGNMENT SETTINGS
(The figures below are nominal and used for representative purposes only.)
Alignment FunctionSettings / Special features
Horizontal Position
Vertical Position
Horizontal Amplitude
Vert. Amplitude
EW-amplitude
EW-amplitude
Trapezium-comp
Trapezium-comp
H-Pos
061
V-Pos
005
H-Amp
055
V-Amp
054
E/W-Amp1
-128
E/W-Amp2
006
Trapez-1
047
Trapez-2
-128
Optimum setting.
Optimum setting.
Optimum setting.
Optimum setting.
Optimum setting.
Optimum setting.
Optimum setting.
Optimum setting.
Vertical Linearity
Vertical Symmetry
DVCO
Cut-off DC
Ug2 Test
Highlight
Lowlight
Sub-Brightness
V-Lin
006
V-Sym
002
DVCO
-005
Cut-off
0171
Ug2
055
O.K.
High090207770864
Low011701320112
Sub-Brightness
255
Optimum setting.
Optimum setting.
Receive a PAL Colour Bar Pattern. For
DVCO alignment press "Blue" button, wait
until the colours are changing slowly and
press "STR".
To adjust Cutoff connect an oscilloscope to
the blue cathode, adjust "cutoff" value
using the "Yellow" and "Blue" buttons until
the black level is 160V±5V press "STR" to
store the value. Remove the oscilloscope.
Select Ug2 adjustment and adjust the
screen VR until the display shows "O.K."
Black Level
160V±5V
GND
Optimum setting.
Optimum setting.
7
Page 10
,Q
Q352Q35
,Q
&
Q35
8
AV1
9LGHR2XW
%OXH
*UHHQ
5HG
9LGHR
AV2
9LGHR
$9
E - BOARD
Q105
Q104
61 V IN 1
43 B IN
42 G IN
41 R IN
62 VIN 2
63 VIN 3
60 C IN
VIDEO BLOCK DIAGRAM
IC601
VIN 4
64
VIDEO
PROCESSOR
VIDEO OUT
59
Q3601
SVM OUT 34
B OUT 39
G OUT 38
R OUT 37
B IN 47
G IN 46
R IN 45
Q950Q951
Q303
Q304
Q301
Q302
E8
Y - BOARD
Q908Q906
Q905Q907Q909
7
7
4
4
3
IC351
7
Q353
VM
COILS
RGB
4
OUTPUT
2
1
8
9
3
3
5
5
Y2
CRT
1
2XW
9LGHR
AV3
Q3001
68
CVBS
IC1101
MICRO
PROCESSOR
R 37
G 38
B 39
E15
6
8
1
E61
H - BOARD
H1
6
8
1
H3
Q3402
IC3401
8
VIDEO
SWITCHING
6
3
Page 11
AUDIO BLOCK DIAGRAM
Q103
9
E - BOARD
TUNER
X101
X102
Q101
Q102
IC2101
PROCESSOR
44 MONO IN
49 ANA_IN2+
47 ANA_IN1+
AUDIO
DACM_R 24
DACM_L 25
SC3_IN_L 37
SC3_IN_R 38
SC1_OUT_R 30
SC1_IN_R 42
SC1_OUT_L 31
SC1_IN_L 41
Q2102
Q2103
Q252
Q251
5 R
2 L
IC251
AUDIO
OUTPUT
R 7
L 11
E6
1
E7
3
AV3
6 R
7 R
HEADPHONE
5 L
4 L
L
R
1 R OUT
2 R IN
3 L OUT
6 L IN
Q2304
Q2302
Q2301
Q2303
21 DACA_R
22 DACA_L
SC2_OUT_R 27
SC2_IN_R 40
SC2_OUT_L 28
SC2_IN_L 39
AUDIO
MONITOR
OUT
AV1
1 R OUT
2 R IN
3 L OUT
6 L IN
Page 12
E - BOARD
CONTROL BLOCK DIAGRAM
10
H - BOARD
IC3401
VIDEO
SWITCHING
N - BOARD
IC1071
REMOTE
CONTROL
RECEIVER
TUNER
POS/NEG
H33E63
5
1
IC2101
4
AUDIO
PROCESSOR
8
7
SDA 1
SCL 1
SCL
SDA
L/L’
IC601
4
VIDEO
PROCESSOR
3
SERVICE / TEST
E18
6
SDA 1
5
SCL 1
4
SDA 2
3
SCL 2
8
SLOW 2
10
AV LINK
N14E19
4
88
LOCAL
KEYS
SWITCH
MATRIX
VPROT
KEYSCAN
ON/OFF
R.C.
L.E.D.
PROT 1
SCL
48
71
60
52
74
81
75
PROCESSOR
SDA
49
IC1101
MICRO
L/L’
POS/NEG
83
82
SCL 2
50
SDA 2
51
SLOW 2
59
OUT
72
IN
73
58
55
IC1103
6
EAROM
5
AV2
AV1
SERVICE
SLOW 1
8
SLOW 1
10
SCL 1
12
SDA 1
Page 13
POWER SUPPLY BLOCK DIAGRAM
11
DEGAUSS
COIL
N - BOARD
IC1071
REMOTE
CONTROL
RECEIVER
RESET
E - BOARD
E1
4
1
2
1
E2
N12E19
2
D801
3
IC801
POWER
SUPPLY
R814
D805
5V SBY
5V SBY
Q855
Q854
~
~
+
4
2
31
1
IC1102
EPROM
IC850
REG
32
T801
P1
P2
B1
IC251
AUDIO
OUTPUT
10
29V
S7
150V
S2
D850
7V
S5
Q850
15V
S4
1
IC851
REG
3
12V
1
IC853
REG
2
1
8V
8
IC1103
EAROM
TUNER
9V
3
IC852
1
REG
33V
R854
33V
5V
5V
D862
T551
9
2
6
5
8
27V
6
IC701
EW
CORRECTION
5V
2
IC1105
RESET
-14V
14V
200V
D454
IC451
1
6
V-OUTPUT
3
IC2101
AUDIO
PROCESSOR
Y - BOARD
IC351
E32Y3
2
RGB
OUTPUT
6
H - BOARD
E621H3
2
IC3401
7
VIDEO
SWITCHING
46
33
16
15
58
IC601
VIDEO
PROCESSOR
Q852
D867
D868
Q853
T802RL801
Line
Filter
R802
1
R805
2
43
2
66
IC1101
MICRO
PROCESSOR
Page 14
PARTS LOCATION
NOTE:
The numbers on the exploded view below
refer to the mechanical section of the
Replacement Parts List.
19
20
16
12
14
11
3
18
13
6
15
9
2
17
10
4
5
7
8
1
12
Page 15
Components Identified by mark have special characteristics important for safety.
* When replacing any of these components, use only manufacturers specified parts.
In case of ordering these s pare parts, please always add the complete Model-Type
number to your order.
DescriptionCct RefParts NumberDescriptionCct RefParts Number
COMMON PARTS
MECHANICAL PARTS
SPEAKER 1EASG15S505A2
TUNER 2ENG29504G
REMOTE CONTROL 3EUR511200
PANASONIC BADGE 4TBM8E1728
POWER BUTTON 5TBX8E061
REAR AV COVER 6TKP8E1222
DOOR LID 7TKP8E1256
CHASSIS FRAME 8TMX8E020
H P.C.B. 9TNP8EH002AA
N P.C.B. 10TNP8EN016AD
BATTERY COVER (REMOTE) 11UR51EC904A
CRT FIXING SCREW 12VP17005-32
MISCELLANEOUS COMPONENTS
FIX CLIP 31221212478
I.C. SOCKET 832AG11D-ESL
RELAY F9-4-220
84 PIN SOCKET PCS-084A-1
PRESET LABEL TBM8E1615
REAR AV LABEL TBM8E1781
LID CATCH TEK6940
POWER BUTTON SPRING TES8E015
LED HOLDER TMW8E027
BATTERY PACK UM-3DJ-2P
ANODE LEAD ZTUZAE550A
RELAY RL801 TSE1885-1
THERMISTOR R802 232266296706
CRT SOCKET S351 0330550049
BACK COVER 13TKU8E00311-1
C.R.T. 14A59ECF50X41
CABINET 15TKY8E215
DEGAUSS COIL 16TLK8E05138
E P.C.B. 17TNP8EE009AP
MODEL LABEL 18TQF8E2683
POWER CORD 19TSX8E0028
Y P.C.B. 20TNP8EY012AA
OUTER CARTON TPC8E4660-1
TOP CUSHION TPD8E657
BOTTOM CUSHION TPD8E658
DescriptionCct RefParts NumberDescriptionCct RefParts Number
CARBONR359 ERDS1TJ114 0.5W 5%110K
CAPACITORS
CERAMIC C551 ECKC3D152J2KV
DIFFERENCES FOR MODEL TX-28EX4F
MECHANICAL PARTS
BACK COVER 13TKU8E00321-1
C.R.T. 14A66ECF50X41
CABINET 15TKY8E305
DEGAUSS COIL 16TLK8E05140
E P.C.B. 17TNP8EE009AF
MODEL LABEL 18TQF8E2682
POWER CORD 19TSX8E0027
Y P.C.B. 20TNP8EY012AF
MISCELLANEOUS COMPONENTS
OUTER CARTON TPC8E4659
TOP CUSHION TPD8E655
BOTTOM CUSHION TPD8E656
Components identified by mark have special characteristics
important for safety. When replacing any of these components, use
only manufacturer's specified parts.
NOTE
1. RESISTOR
All resistors are carbon ¼W resistor, unless marked otherwise.
Unit of resistance is OHM (Ω) (k=1,000, M=1,000,000)
2. CAPACITORS
All capacitors are ceramic 50V unless marked otherwise.
Unit of capacitance is µF unless otherwise stated.
3. COIL
Unit of inductance is µH, unless otherwise stated.
4. TEST POINT
Test Point Position
5. EARTH SYMBOL
Chassis Earth (Cold)
Line Earth (Hot)
6. VOLTAGE MEASUREMENT
Voltage is measured by a DC voltmeter.
Measurement conditions are as follows:
Power sourceAC 220V-240V, 50Hz
Receiving SignalColour Bar signal (RF)
All customer controlsMaximum position
7.
Indicates the Video signal path
Indicates the Audio signal path
These schematic diagrams are the latest at time of printing and are subject to change without notice.
REMARKS
a. Do not touch the hot part, or the hot and cold parts at the same time, as you are liable to a shock hazard.
b. Do not short circuit the hot and cold circuits as electrical components may be damaged.
c. Do not connect an instrument, such as an oscilloscope, to the hot and cold circuits simultaneously as this may cause
fuse failure. Connect the earth of the instruments to the earth connection of the circuit being measured.
d. Make sure to disconnect the power plug before removing the chassis.
NOTE
1. The Power Supply Circuit contains a circuit area, which uses a separate power supply to isolate the earth connection.
The circuit is defined by HOT and COLD indications in the schematic diagram. All circuits, except the Power Circuit, are
COLD.