SERVICE HINTS.......................................................................................................................................................................3
SERVICE POSITION.................................................................................................................................................................4
ADJUSTMENT PROCEDURE AND SELF-CHECK ..................................................................................................................6
PARTS LOCATION.................................................................................................................................................................13
REPLACEMENT PARTS LIST................................................................................................................................................14
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 3
SERVICE HINTS
How to remove the rear cover
1. Remove the 15 screws as shown in Fig.2.
LOCATION OF CONTROLS
SCREWS
Fig.2.
Focus
N - Board
E - Board
H - Board
Fig.3.
Screen
Y - Board
3
Page 4
HOW TO MOVE THE CHASSIS INTO SERVICE POSITION
(A)
1. Remove the bead clamper from the mains lead and attach to the degauss coil, shown in Fig.5.
2. Hold and lift the rear of the E-PCB chassis and gently pull the chassis toward you, as shown in Fig.4.
3. Release the respective wiring clips and rotate the chassis horizontally through 90°, anti-clockwise.
4. Move the EHT lead around to the left side of the CRT neck.
5. Elevate the front of the chassis.
6. Clip the chassis frame onto the bead clamper, on the degauss coil, as shown in Fig.5.
7. Locate the base of the chassis frame into the hole (marked A), shown in Fig.6.
8. After servicing replace the bead clamper and ensure all wiring is returned to its original position before returning the
receiver to the customer.
Fig.5.
Fig.4.
Fig.6.
4
Page 5
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.
5
Page 6
ADJUSTMENT PROCEDURE
Item / PreparationAdjustments
+B SET-UP
1. Receive a Greyscale signal.
2. Set the controls :BrightnessMinimum
ContrastMinimum
VolumeMinimum
CUT OFF / Ug2 Test
1. Receive a Greyscale signal.
2. Degauss the tube externally.
3. Set the TV into Service Mode 1.
4. Select Cut off mode.
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."
FACTORY SETTINGS
To return customer settings to factory settings and clear owner ID of all information input by the customer, enter Self-Check
mode. Press the down (-/v) button on the customer controls at the front of the TV set, at the same time pressing the STATUS
buttonon the remote control. To exit Self Check, switch off the TV set at the power button.
NOTE: Self Check should only be used when refurbishing the TV set and not during normal repair work.
Self Check is also used to automatically check the bus lines and hexadecimal code of the TV set.If the CCU ports have
been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.". For more in-depth TV
diagnostics use the LUCI interface as listed below.
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 System for Multimedia Interactive Notes)
As well as providing a first step towards more interactive training this product also achieves quick access to Technical
Information.
6
Page 7
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
7
Page 8
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.
8
Page 9
,Q
Q352Q35
,Q
&
Q35
9
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 10
AUDIO BLOCK DIAGRAM
10
E - BOARD
TUNER
Q101
Q102
IC2101
PROCESSOR
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 11
E - BOARD
CONTROL BLOCK DIAGRAM
11
H - BOARD
IC3401
VIDEO
SWITCHING
N - BOARD
REMOTE
CONTROL
RECEIVER
5
IC1071
H33E63
1
N14E19
4
88
IC2101
4
AUDIO
PROCESSOR
LOCAL
KEYS
SWITCH
MATRIX
8
7
VPROT
KEYSCAN
ON/OFF
R.C.
L.E.D.
PROT 1
SDA 1
SCL 1
71
60
52
74
81
75
TUNER
SCL
SDA
SCL
SDA
48
49
IC1101
MICRO
PROCESSOR
IC601
4
VIDEO
PROCESSOR
3
SERVICE / TEST
E18
6
SDA 1
5
SCL 1
4
SDA 2
3
SCL 2
SCL 2
50
SDA 2
51
SLOW 2
59
OUT
72
IN
73
58
55
IC1103
6
EAROM
5
AV2
8
10
SLOW 2
AV LINK
AV1
SERVICE
SLOW 1
8
SLOW 1
10
SCL 1
12
SDA 1
Page 12
POWER SUPPLY BLOCK DIAGRAM
12
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
S7
S2
S4
29V
150V
D850
7V
S5
Q850
15V
1
IC851
REG
3
12V
1
IC853
REG
3
1
8V
8
IC1103
EAROM
33V
TUNER
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 13
13
PARTS LOCATION
NOTE:
The numbers on the exploded view below
refer to the mechanical section of the
Replacement Parts List.
14
3
22
12
19
15
17
18
6
5
21
4
16
8
10
2
20
11
24
1
9
23
7
13
Page 14
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 1EAGG1216C2
TUNER 2ENG27506G
REMOTE CONTROL 3EUR511200
PANASONIC BADGE 4TBM8E1728
POWER BUTTON 5TBX8E045
SPEAKER NET 6TKP8E1169
DOOR LID 7TKP8E1180
REAR AV COVER 8TKP8E1222
CHASSIS FRAME 9TMX8E020
H P.C.B. 10TNP8EH002AA
N P.C.B. 11TNP8EN015AA
Y P.C.B. 12TNP8EY012AC
POWER CORD 13TSX8E0025
BATTERY COVER (REMOTE) 14UR51EC904A
CRT FIXING SCREW 15VP17005-32
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 TMW8E020-1
TOP BOARD TZS9EV245
BACK BOARD TZS9EV246
VIDEO SHELF TZS9EV247
SIDE PANEL LEFT TZS9EV248
SIDE PANEL RIGHT TZS9EV249
HINGE TOP TZS9EV255
HINGE BOTTOM TZS9EV256
PUSH PLATE TZS9EV257
VIDEO SHELF PINS TZS9EV258
LOCATION PINS TZS9EV259
LOCKING INSERT TZS9EV260
LOCKING NUT TZS9EV261
GLIDE TZS9EV262
ALLEN KEY TZS9EV263
LATCH SPACER TZS9EV264
MAGNETIC LATCH TZS9EV265
MAGNETIC LATCH SCREWS TZS9EV266
DOWEL TZS9EV267
HINGE TZS9EV268
REPLACEMENT PARTS LIST
Important Safety Notice
CORNER PANEL LEFT TZS9EV269
CORNER PANEL RIGHT TZS9EV270
GLASS DOOR TZS9EV271
BASE BOARD TZS9EV272
GLIDE TZS9EV274
BATTERY PACK UM-3DJ-2P
VIDEO CABINET VS-XD3/A
ANODE LEAD ZTUZAE550A
RELAY RL801 TSE1885-1
THERMISTOR R802 232266296706
CRT SOCKET S351 0330550049
DescriptionCct RefParts NumberDescriptionCct RefParts Number
DEGAUSS COIL 19TLK8E05138
E P.C.B. 20TNP8EE009BC
LEFT PANEL 21TKP8E1192
MODEL LABEL 22TQF8E2671
RIGHT PANEL 23TKP8E1194
TOP PANEL 24TKP8E1190
MISCELLANEOUS COMPONENTS
OUTER CARTON TPC8E4660-1
TOP CUSHION TPD8E631
BOTTOM CUSHION TPD8E632
I.C.s
EAROM * IC1103XGL2-03GA
CAPACITORS
CERAMIC C551 ECKC3D152J2KV
DIFFERENCES FOR MODEL TX-28XD4/A
MECHANICAL PARTS
BACK COVER 16TKU8E00320
C.R.T. 17A66ECF50X41
CABINET 18TKY8E160
DEGAUSS COIL 19TLK8E05140
E P.C.B. 20TNP8EE009AU
LEFT PANEL 21TKP8E1182
MODEL LABEL 22TQF8E2661
RIGHT PANEL 23TKP8E1186
TOP PANEL 24TKP8E1184
MISCELLANEOUS COMPONENTS
OUTER CARTON TPC8E4659
TOP CUSHION TPD8E633
BOTTOM CUSHION TPD8E634
I.C.s
EAROM * IC1103XGL2-03HA
CAPACITORS
CERAMIC C551 ECKC3D122J 2KV
1.5nF
1.2nF
22
Page 23
NOTES
23
Page 24
SCHEMATIC DIAGRAMS FOR MODELS
TX-28XD4/A / TX-25XD4/A
(EURO-4 CHASSIS)
IMPORTANT SAFETY NOTICE
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.