Panasonic TX-29AK1P Service Manual
SPECIFICATIONS
Power Source: 220-240V a.c., 50Hz
Power Consumption: 150W
Stand-by Power
Consumption: 1,4W
Aerial Impedance: 75Ω unbalanced, Coaxial Type
Receiving System: PAL B/G, H, D/K, PAL-525/60
SECAM B/G, D/K
M.NTSC
NTSC (AV only)
Receiving Channels:
VHF E2-E12 VHF H1-H2 (ITALY)
VHF A-H (ITALY) VHF R1-R2
VHF R3-R5 VHF R6-R12
UHF E21-E69 CATV (S01-S05)
CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10)
CATV S21-S41 (HYPERBAND)
Intermediate Frequency:
Video/Audio
Video 38,9MHz
Audio 33,16MHz, 33,4MHz
32,4MHz (A2 Stereo)
33,05MHz (NICAM)
32,66MHz, 32,4MHz (Czech Stereo)
Colour 34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
Terminals:
AUDIO MONITOR OUT Audio (RCAx2) 500mV rms 1kΩ
AV1 IN Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 10kΩ
RGB (21 pin)
ORDER No. SM-99056
Colour Television
TX-29AK1P
EURO-4 Chassis
AV2 IN Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 10kΩ
S-Video IN Y: 1V p-p 75Ω
(21-pin) C:0,3V p-p 75Ω
AV2 OUT Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 1kΩ
Selectable output (21 pin)
AV3 IN Audio (RCAx2) 500mV rms 10kΩ
Video (RCAx1) 1V p-p 75Ω
High Voltage: 30,5kV ±1kV
Picture Tube: M68LQK185X06 68cm
Audio Output: 2 x 20W (Music Power)
8Ω Impedance
Headphones: 8Ω Impedance
3,5 mm
Accessories
supplied : Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height: 568mm
Width: 688mm
Depth: 492mm
Net weight: 47kg
Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
NOTE: This Service Manual should be used in conjunction with
the EURO-4 Technical guide.
AV1 OUT Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 1kΩ
CONTENTS
SAFETY PRECAUTIONS..........................................................................................................................................................2
SERVICE HINTS.......................................................................................................................................................................3
SERVICE POSITION.................................................................................................................................................................4
ADJUSTMENT PROCEDURE AND SELF-CHECK ..................................................................................................................5
WAVEFORM PATTERN TABLE...............................................................................................................................................6
ALIGNMENT SETTINGS...........................................................................................................................................................7
BLOCK DIAGRAMS..................................................................................................................................................................8
PARTS LOCATION.................................................................................................................................................................12
REPLACEMENT PARTS LIST................................................................................................................................................13
SCHEMATIC DIAGRAMS.......................................................................................................................................................23
CONDUCTOR VIEWS.............................................................................................................................................................28
SAFETY PRECAUTION
GENERAL GUIDE LINES
1. It is advisable to insert an isolation transformer in the
a.c. 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 a.c. outlet.
5. Potentials as high as 31,5kV 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 a.c. 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 a.c. 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 a.c. cord directly into the a.c. 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 a.c. 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 a.c. plug at the outlet and repeat each of
the previous 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 31,5kV 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.
30,5kV ± 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
SERVICE HINTS
How to remove the rear cover
1. Remove the 9 screws as shown in Fig.2.
Screws A
LOCATION OF CONTROLS
Screws A
SCREWS
Fig.2.
M-Board
H-Board
E-Board
Screen
Fig.3.
Focus
Y-Board
V-Board
Q-Board
N-Board
P-BoardZ-Board
3
HOW TO MOVE THE CHASSIS INTO SERVICE POSITION
(
(
1. Remove the bead clamper from the mains lead and affix, using back cover screw, into top right-hand cabinet rib (A),
shown in Fig.3.
2. Remove 2 screws (B), as shown in Fig.4, and remove speaker assembly.
3. Hold and lift the rear of the chassis and gently pull the chassis toward you, as shown in Fig.3.
4. Release the respective wiring clips and rotate the chassis vertically through 90°, anti-clockwise.
5. Locate the base of the chassis frame into location (C), shown in Fig.5 / Fig.7.
6. Clip the chassis frame onto the bead clamper, shown in Fig.5 / Fig.6.
7. After servicing replace the bead clamper and speaker, and ensure all wiring is returned to its original position before
returning the receiver to the customer.
A)
Screws
(B)
Fig.4.
Fig.3.
Fig.5.
Fig.6.
C)
Fig.7.
4
ADJUSTMENT PROCEDURE
Item / Preparation Adjustments
+B SET-UP
1. Receive a Greyscale signal.
2. Set the controls :-
Brightness Minimum
Contrast Minimum
Volume Minimum
1. Set the +B voltage up as follows:Adjust R811 so that B2 shows 148V±1V
2. Confirm the following voltages.
B9 5 ± 0,25V B10 5 ± 0,25V
B5 12 ± 0,5V B11 33 ± 1,5V
B4 16 ± 1V B7 8 ± 0,5V
B12 26 ± 1V B8 5,5 ± 0,5V
B3 35 ± 1V B13 15 ± 1V
B1 200 ± 10V B14 -15 ± 1V
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.
To adjust Cutoff connect an oscilloscope to the Blue
cathode. Press "STR" and 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 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
button on the remote control. To exit Self Check, switch off the TV set at the power button.
VDP O.K.
TUN O.K.
E2 O.K.
MSP O.K.
--
OPTION 1 3D
OPTION 2 3C
PCB O.K.
Cab O.K.
Sum
Factory use only
OPTION 3 1F
OPTION 4 40
OPTION 5 FF
OPTION 6 61
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 & TZS8EZ001
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.
5
WAVEFORM PATTERN TABLE
Vert Out
IC601 Pin 31
0.7V
H - Out
IC601 Pin 50
3V
HFLB
IC601 Pin 13
6.2V
20mS
64µS
Vert Drive
IC451 Pin 2
57V
H - Out
IC701 Pin 5
30mV
HFLB
IC701 Pin 8
1.5V
20mS
64µS
VFLB
IC451 Pin 3
1V
20mS
H - Pulse
Base Q503
2V
64µS
Video Out
IC601 Pin 59
2V
R - Out
IC601 Pin 37
275mV
R - Out
E8 Pin 5
4.6V
SCL
IC1201 Pin 3
64µS
64µS
64µS
G - Out
IC601 Pin 38
275mV
G - Out
E8 Pin 3
4.4V
SVM Out
IC601 Pin 34
64µS
64µS
64µS
64µS
B - Out
IC601 Pin 39
275mV
64µS
B - Out
E8 Pin 4
4.6V
64µS
3.7V
88mV
13µS
64µS
6
ALIGNMENT SETTINGS
(The figures below are nominal and used for representative purposes only.)
Alignment Function Settings / 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
V-Lin
006
V-Sym
002
DVCO
-005
Cut-off
0171
Ug2
055
O.K.
High 0902 0777 0864
Low 0117 0132 0112
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. Press "STR" and 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.
Sub-Brightness
Sub-Brightness
255
7
Optimum setting.
8
,Q
Q35
,Q
&
Q35
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
Q950 Q951
Q303
Q304
Q301
Q302
7
4
3
5
E8
6 6
Y - BOARD
7
4
3
5
Y2
M - BOARD
M2E17
Q908Q906
Q905 Q907 Q909
IC351
3
7
RGB
OUTPUT
2
1
4
8
9
Q3206 Q3205Q3207
Q3203 Q3204
Q3201 Q3202
Q3208 Q3209
Q353
VM
COILS
CRT
2
1
C
Y
AV3
2XW
9LGHR
Q3001
68
CVBS
IC1101
MICRO
PROCESSOR
R 37
G 38
B 39
E15
242
6
8
1 1
E61
H1
H3
42 86
M3
42 86
M3
H - BOARD
Q3402
4
6
8
IC3401
8
VIDEO
SWITCHING
6
3
AUDIO BLOCK DIAGRAM
Q103
9
AUDIO
MONITOR
OUT
E - BOARD
TUNER
X101
X102
Q101
Q102
Q2303
Q2301
Q2304
Q2302
IC2101
AUDIO
PROCESSOR
44 MONO IN
49 ANA_IN2+
47 ANA_IN1+
21 DACA_R
22 DACA_L
Z - BOARD
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
SC2_OUT_R 27
SC2_IN_R 40
SC2_OUT_L 28
SC2_IN_L 39
Q2102
Q2103
Z4
E10
IC2201
AMP
10
12 65
12 65
Z5
L MIC
1
Z2
R MIC
2
E16A1M1
2 2
E1710M2
10
8 8
M - BOARD
1
M4
1
M5
3
AV3
6 R
7 R
HEADPHONE
5 L
4 L
L
R
Q252
IC2221
AMP
10
5 R
8
2
1
9
IC251
AUDIO
R 7
2
1
9
8
OUTPUT
2 L
Q251
L 11
1 R OUT
2 R IN
3 L OUT
6 L IN
AV1
1 R OUT
2 R IN
3 L OUT
6 L IN
H - BOARD
CONTROL BLOCK DIAGRAM
E - BOARD
TUNER
10
IC3401
VIDEO
SWITCHING
V - BOARD
N5
N - BOARD
IC1051
REMOTE
CONTROL
RECEIVER
LOCAL
KEYS
SWITCH
MATRIX
N4
M10
M - BOARD
5
V1
4 1 3
4 1 3
7
7
H31E63
1
M18E16A
8
7 7
IC2101
4
AUDIO
PROCESSOR
8
7
KEYSCAN
ON/OFF
VPROT
R.C.
L.E.D.
PROT 1
SDA 1
SCL 1
71
60
52
74
81
75
SCL SDA
SCL
SDA
48 49
IC1101
MICRO
PROCESSOR
L/L’ POS/NEG
L/L’
POS/NEG
83 82
SERVICE
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
5855
IC1103
6
EAROM
5
AV2
8
10
SLOW 2
AV LINK
AV1
SLOW 1
8
SLOW 1
10
SCL 1
12
SDA 1
M25E17
5
POWER SUPPLY BLOCK DIAGRAM
11
N - BOARD
Line
Filter
Line
Filter
4 1
N1
Mains
In
M - BOARD
IC1900
G.M.C.
10
2
M10
2
N4
IC1051
REMOTE
CONTROL
RECEIVER
N - BOARD
S840
N2
F841
M83E21
M23E17
N58V1
E - BOARD
3
IC801
POWER
SUPPLY
R814
D805
5V SBY
Q855
Q854
~
D801
~
+
4
13132
IC1102
EPROM
2
IC850
REG
T801
P1
P2
B1
IC251
33V
AUDIO
OUTPUT
10
150V
7V
15V
IC851
12V
29V
Q850
1
REG
3
1
IC853
D850
TUNER
9V
3
IC852
1
REG
S7
S2
S5
S4
REG
3
1
8V
833
IC1103
EAROM
IC2101
AUDIO
PROCESSOR
Z - BOARD
R854
5V
5V
46
16
IC2201
AMP
D862
33V
5V
IC1105
RESET
4
T551
9
2
200V
-14V
6
14V
5
8
6
D454
27V
IC701
EW
CORRECTION
2
PROCESSOR
8
E10
8
Z4
1
6
3
15
IC601
VIDEO
4
IC451
V-OUTPUT
58
IC2201
AMP
E32Y3
E621H3
Y - BOARD
2
6
OUTPUT
H - BOARD
2
7
SWITCHING
IC351
RGB
IC3401
VIDEO
Q852
D867
D868
E1
4
4
1
2
1
F802
Degauss Coil
1
T802 RL801
Line
Filter
R802
Q853
E2
1
R805
3
2
IC1104
3
RESET
5V SBY
24366
IC1101
MICRO
PROCESSOR
V - BOARD
8
D805
30
4
PARTS LOCATION
NOTE:
The numbers on the exploded view below
refer to the mechanical section of the
Replacement Parts List.
28
25
15
1
8
5
14
12
9
7
27
13
2
29
31
11
32
6
10
22
23
21
24
19
3
26
18
17
20
16
12
Components Identifie d by mark have special charac t eris t ics important for safety.
* When replacing any of these components, use only manufacturers specified parts.
In case of ordering these spare parts, please always add the c omplete Model-Type
number to your order.
DescriptionCct Ref Parts Number DescriptionCct Ref Parts Number
MECHANICAL PARTS
LEFT SPEAKER 1 EAB10106BL
RIGHT SPEAKER 2 EAB10106BR
TUNER 3 ENG29505GR
REMOTE CONTROL 4 EUR511200
C.R.T. 5 M68LQK185X06
PANASONIC BADGE 6 TBMA059
POWER BUTTON 7 TBXA20001
CRT FIXING SCREW 8 THT1062
DOOR LID LEFT 9 TKP8E1297
DOOR LID RIGHT 10 TKP8E1298
REAR AV PANEL 11 TKP8E1301
FRONT PANEL 12 TKPA28603
BACK COVER 13 TKU8E00500
CABINET 14 TKY8E432
DEGUASS COIL 15 TLK8E05148
CONTROL BRACKET 16 TMW8E039
CHASSIS FRAME 17 TMX8E036
E P.C.B. 18 TNP8EE009DV
H P.C.B. 19 TNP8EH002AB
M P.C.B. 20 TNP8EM020AA
N P.C.B. 21 TNP8EN018AC
P P.C.B. 22 TNP8EP015AC
Q P.C.B. 23 TNP8EQ002AB
V P.C.B. 24 TNP8EV004AA
Y P.C.B. 25 TNP8EY012AH
Z P.C.B. 26 TNP8EZ001AE
MODEL LABEL 27 TQF8E2859
POWER CORD 28 TSX8E0033
FOCUS LEAD ASSY 29 TXFJTF01BMTG
BATTERY COVER (REMOTE) 30 UR51EC904A
ANODE CABLE 31 ZTBZAD550A
F.B.T. 32 ZTFM05006A
MISCELLANEOUS COMPONENTS
FIX CLIP 31221212478
IC SOCKET 832AG11D-ESL
RELAY F9-4-220
84 PIN IC SOCKET PLCC-84-T
SET FOOT (FRONT) TBLG3019
SET FOOT (REAR) TBLG3020
PRESET LABEL RIGHT TBM8E1930
PRESET LABEL LEFT TBM8E1931
AV PANEL LABEL TBM8E1942
LID CATC H TEK6940
CRT EARTH SPRING TES2298
POWER BUTTON SPRING TES8E019
ORNAMENTAL PANEL TKPA28301
GEOMAGNETIC COIL TLK8E05124
POWER BUTTON JOINT TMX8E035
OUTER CARTON TPC8E4783
TOP CUSHION TPD8E699
BOTTOM CUSHION TPD8E700
REPLACEMENT PARTS LIST
Important Safety Notice
BATTERY PACK UM-3DJ-2P
THERMISTOR R842 232266296706
THERMISTOR R843 232266296706
RELAY RL801 TSE1885-1
C.R.T. SOCKET S351 0330550049
INSTRUCTION BOOKS
BULG./ROMANIAN TQB8E2808MN1
POLISH/HUNGARIAN TQB8E2808PQ1
CZECH/ENGLISH TQB8E2808RU1
I.C.s
AUDIO OUTPUT IC251 LA4282
R.G.B. OUTPUT IC351 TDA6103Q-N3
VERTICAL OUTPUT IC451 LA7845N
VIDEO PROCESSOR IC601 VDP3120BPPC2
E/W CORRECTION IC701 TEA2031A
POWER SUPPLY IC801 STRF6654LF51
ERROR AMPLIFERIC850 SE140N
12V REGULATORIC851 L78M12MRB
9V REGULATOR IC852 L78M09MRB
8V REGULATOR IC853 AN78L08TA
LED RECEIVER IC1051 RPM6937
MICRO PROCESSOR IC1101 SDA5450C70
EPROM * IC1102 27C2001-G13
EAROM * IC1103 XDG2-01DP
RESET IC1104 MN1381-R(TA)
RESET IC1105 MN1381-T(TA)
EARTH CORRECTION IC1900 LA6515
AUDIO PROCESSOR IC2101 MSP3410DPOB4
OPERATIONAL AMPLIFIER IC2201 AN6554NSF-E2
OPERATIONAL AMPLIFIER IC2221 AN6554NSF-E2
VIDEO SWITCHING IC3401 TEA2114
FUSES
FUSE F841 19181-3.15
FUSE F1900 TR5-T374-315
FUSE HOLDERF8411 EYF52BC
FUSE HOLDERF8412 EYF52BC
DIODES
DIODE D101 MA3020TX
DIODE D102 MA3020TX
DIODE D251 MA2180BLFS
DIODE D253 MA700TA5
DIODE D254 MA700TA5
DIODE D354 1SR124-4AT82
DIODE D355 1SR124-4AT82
DIODE D356 1SR124-4AT82
DIODED357 MA165TA5
DIODED358 MA165TA5
DIODED359 MA165TA5
DIODE D360 MTZJT-7715A
DIODED361 MA165TA5
DIODED362 MA165TA5
13
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