1. It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis.
2. When servicing, observe the original lead dress, especia lly the lead dress in the high voltage circuits. If a short circuit is found,
replace all parts which have been overheated or damaged by the short circuit.
3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C
combinations, are properly installed.
4. When the receiver is not to be used for a long period of time, unplug the power cord from the AC cord outlet.
5. Potential, as high as
involves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by anyone who is not
thoroughly familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the
picture tube to the receiver chassis before handling the tube. After servicing make the following leakage current checks to
prevent the customer from being exposed to shock hazards.
1.2. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Turn on the receiver’s power switch.
Measure the resistance value, with an ohmmeter, between the jumper 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 4 MΩand 20 MΩ. When the exposed metal does not have a return path to the chassis,
the reading must be infinite.
32.0kV
is present when this receiver is in operation. Operation of the receiver without the rear cover
1.3. Leakage Current Hot Check (Fig. 1)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Check a 2 kΩnon-inductive resistor and an AC/DC current meter, in series with each exposed metallic part on the receiver in
turn and an earth such as a water pipe.
The current from any point should not exceed 0.7 mA peak AC or 2 mA DC. In the case of a measurement being outside of
these 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.
Fig. 1
1.4. X-Radiation
Warning:
The potential sources of X-Radiation in TV set are the EHT section and the picture tube. When using a picture tube test jig for
service, ensure that jig is capable of handling
Note:
It is important to use an accurate periodically calibrated high voltage meter.
1. Set the brightness to minimum.
2. Use the remocon to get into Service Mode.
3. Measure the EHT. The meter reading should indicate
and correction is required to prevent the possibility of premature component failure.
4. To prevent the possibility X-Radiation, it is essential to use the specified picture tube, if service replacement becomes
necessary.
32.0kV
without causing X-Radiation.
31.0±1.0kV
. If the meter indication is out of tolerance, immediate service
3
Page 4
_
_
TC-29FX20P
1.5. GP41 Chassis Block Diagram
CRT
coil
defl.
29" models
CRT
DRIVE
L
VM DRIVE
PIP models
IC1101
EEPROM
RGB
SCL SDA
SCL
SDA
R/G/B
PVP
IN
IC1801
CVBS
GP41 CHASSIS BLOCK DIAGRAM
PP
SPEAKER
R/G/B
CVBS OUT
AMP
AUDIO
A
VCT-IF
OUT
AUDIO
IC2301
REAR INPUTS
VM
V
H
IC601
IF
IN
IN
V
A
MON_OUT
AV1 : V/L/R
AV 3 : YUV/V/L/R
V OUT
TUNER
AV2 : V/L/R
FRONT INPUTS
MON_OUT
H OUT
V/L/R
MAIN
POWER
SWITCH
G
AV2 : V/L/R
FRONT INPUTS
GEOMAGNETIC
AMP
IC2401
WOOFER
4
Page 5
2 Service Hints
2.1. Service Position for E-Board
1. Remove the back cover.
2. Stand the TV set as shown in Fig. 2.
3. Remove the A-Board from the TV set by pulling the main board out as shown in Figure 2.
TC-29FX20P
Fig. 2
2.2. Adjustment for White Balance
Preparation:
1. Receive the white balance pattern and aging should have been performed over 30 minutes.
2. Set the picture menu to DYNAMIC NORMAL.
3. Degausse the CRT face.
4. Fix the CRT colour analyze r receiver unit to CRT face.
Adjustment of Low Light.
1. Adjustment Sub Bright, so that Y = 6.3 ± 1.0 nit.
2. Adjustment R-CUT OFF, so that X = 0.247 ± 0.005 nit.
3. Adjustment G-CUT OFF, so that Y = 0.273 ± 0.005 nit.
Adjustment of High Light
1. Adjustment Sub Bright, so that Y = 150 nit.
2. Adjustment R-Drive, so that X = 0.261 ± 0.003 nit.
3. Adjustment B-Drive, so that Y = 0.267 ± 0.003 nit.
2.3. Adjustment for CRT CUT OFF
Preparation:
1. Connect the oscilloscope probe to (GREEN CATHODE) on L Board.
2. Screen VR min.
3. Set the data Sub Bright, Bright.
4. In service Mode at “Bright” dac press [5] in factory mode to enter vertical line and adjust by volume down or up button.
5. Adjust “Screen VR” to set voltage as in table 1.
5
Page 6
TC-29FX20P
2.4. Adjustment Procedure
2.4.1. +B Voltage
Item / preparation
1. Operate the TV set.
2. Set control as follows :
Brightness ........... minimum
Contrast ............... minimum
Adjustment procedure
1. Confirm the DC voltage at the indicated test points, as follows :
TPA 15 : 3.35 ± 0.2V
TPA 16 : 141 ± 2V
TPA 17 : 8.2 ± 0.3V
TPA 18 : 1.9 ± 0.2V
TPA19 : 5.2 ± 0.2V
TPA20 : 220 ± 15V
2.4.2. High Voltage
Item / preparation
1. Receive the crosshatch pattern.
2. Set to 0 Beam.
Screen VR .......... minimum
Contrast .............. minimum
Adjustment procedure
1. Connect a DC voltage meter to TPA 16 and confirm the +B voltage is 141.0 ± 2V.
2. Connect a high frequency voltmeter to heater and confirm that voltage reads 6.3 ± 0.24 (VRMS).
3. Normalize the brightness and contrast.
6
Page 7
2.5. Adjustment
TC-29FX20P
Before Colour Purity, Convergence and White Balance adjustment are attempted,
V. Height, H. Centre and Focus adjustments must be completed.
Colour Purity
1. Set the Brightness and Contrast controls to their
maximum positions.
2. Operate the TV set for 60 minutes.
3. Fully degausse the picture tube by using an external
degaussing coil.
4. Apply a crosshatch pattern signal and adjust the static
convergence magnets to the approximately correct
position.
5. Receive a black and white signal.
6. Set the control as follows:
Red................minimum
Green.............minimum
Blue...............minimum
Press the Shipping button on the remote control twice to
select CRT Adjustment Mode to select low light.
7. Loosen the clamp screw for the Deflection Yoke A in
Fig. 10 and move the Deflection Yoke as close to the
purity magnet as possible.
8. Adjust the purity magnetic rings so that a vertical green
field is obtained at the centre of the screen.
Convergence
1. Apply a crosshatch pattern signal and Normalize
Contrast control to the maximum position s.
2. Adjust Brightness until the grey position of the
crosshatch pattern just becomes black.
3. Adjust the Red and Blue line at the centre of the screen
by rotating the R-B static.
Fig. 6
9. Slowly push the Deflection Yoke and set it where a
uniform green field is obtained.
Fig. 21
10. Re-adjust the Low Light controls to their correct settings
and make sure that a uniform white field is obtained.
11. Tighten the clamp screw A in Fig. 10.
Fig. 8
4. Adjust Red and Blue with Green line at centre of the
screen by rotating (RB)-G static convergence magnetic
rings.
5. Lock convergence magnets with silicone sealer.
6. Remove the DY wedges and slightly tilt the Deflection
Yoke vertically and horizontally to obtain the good
overall convergence.
Fig. 9
7. Fix the Deflection Yoke by reinserting the DY wedges.
Refer to Fig. 10.
8. If purity error is found, repeat“Colour Purity”
adjustment.
7
Page 8
TC-29FX20P
Fig. 10
Fig. 11
Notes:
1. Wedge A, B and C should be inserted following the sequence of 1, 2 and 3 shown in Fig. 11.
2. The wedges should be set 120° apart from each other.
3. Be certain that three wedges are firmly fixed and the Deflection Yoke is tightly clamped in place.
Otherwise the Deflection Yoke may shift its position and cause a loss of convergence and purity.
8
Page 9
3 Conductor Views
TC-29FX20P
9
Page 10
TC-29FX20P
4 Schematic Diagram
10
Page 11
TC-29FX20P
11
Page 12
TC-29FX20P
4.1. A Board
4.1.1. A Board (1/5)
<1A>
<2A>
<3A>
<4A>
<5A>
<6A>
<7A>
<8A>
12
<9A>
Page 13
4.1.2. A Board (2/5)
TC-29FX20P
<1A>
<2A>
<3A>
<4A>
<1B>
<2B>
<3B>
<4B>
<5B>
<5A>
<6A>
<7A>
<8A>
<6B>
<7B>
<8B>
<9A>
<9B>
13
Page 14
TC-29FX20P
4.1.3. A Board (3/5)
<1B>
<2B>
<3B>
<4B>
<5B>
<1C>
<2C>
<6B>
<7B>
<8B>
<3C>
<4C>
<5C>
<6C>
<7C>
<8C>
<9B>
<9C>
14
Page 15
4.1.4. A Board (4/5)
TC-29FX20P
<1C>
<2C>
<1D>
<3C>
<4C>
<5C>
<6C>
<7C>
<8C>
<2D>
<3D>
<4D>
<5D>
<6D>
<7D>
<8D>
<9C>
<9D>
15
Page 16
TC-29FX20P
4.1.5. A Board (5/5)
<1D>
<2D>
<3D>
<4D>
<5D>
<6D>
<7D>
<8D>
<9D>
16
Page 17
4.2. L Board
4.2.1. L Board (1/3)
TC-29FX20P
<1A>
<2A>
<3A>
<4A>
<5A>
17
<6A>
<7A>
Page 18
TC-29FX20P
4.2.2. L Board (2/3)
<1A>
<2A>
<3A>
<1B>
<2B>
<3B>
<4A>
<5A>
<6A>
<4B>
<5B>
<7A>
<6B>
<7B>
18
Page 19
4.2.3. L Board (3/3)
<1B>
<2B>
<3B>
TC-29FX20P
<4B>
<5B>
<6B>
<7B>
19
Page 20
TC-29FX20P
4.3. G Board
4.3.1. G Board (1/4)
<1A>
<2A>
<3A>
<4A>
<5A>
<6A>
20
<7A>
Page 21
4.3.2. G Board (2/4)
TC-29FX20P
<1A>
<2A>
<3A>
<4A>
<5A>
<6A>
<1B>
<2B>
<3B>
<4B>
<5B>
<7A>
<6B>
<7B>
21
Page 22
TC-29FX20P
4.3.3. G Board (3/4)
<1B>
<2B>
<3B>
<4B>
<1C>
<2C>
<3C>
<4C>
<5C>
<5B>
<6C>
<6B>
<7B>
<7C>
22
Page 23
4.3.4. G Board (4/4)
TC-29FX20P
<1C>
<2C>
<3C>
<4C>
<5C>
<6C>
<7C>
23
Page 24
TC-29FX20P
5 Parts Locations
24
Page 25
6 Replacement Parts List
TC-29FX20P
25
Page 26
TC-29FX20P
6.1. Replacement Parts List
Ref.
No.
1A68LZU185X-E PICTURE TUBE
2EAS15S17ASPEAKER
3TBM4G1357MODEL NAME PLATE
4TBM4G3017PANASONIC BADGE
5TBX4G91111POWER BUTTON
NLATNP4G314ATL BOARD
NLATNP4G380AF.A A BOARD
NLATNP4G386AAG BOARD
13TXFKY01DS05CABINET ASSY
C002ECJ1VF1H103Z C 0.01UF, Z, 50V
C003ECJ1VC1H220J C 22PF, J, 50V
C004ECJ1VC1H220J C 22PF, J, 50V
C006F2A1C101A310 E 100UF, 16V
C1064ECJ2FB0J225K C 2.2UF, J, 6.3V
C1103F1J1H103A590 C 0.01UF, J, 50V
C1131F1J1H103A590 C 0.01UF, J, 50V
C1142ECJ1VF1H104Z C 0.1UF, Z, 50V
C1167ECA1CM101BE 100UF, 16V
C2113F2A1H3R3A317 E 3.3UF, 50V
C2117ECJ1VF1H104Z C 0.1UF, Z, 50V
C2129F2A1C102A159 E 1000UF, 16V
C2303F2A1H4R7A317 E 4.7UF, 50V
C2314F2A1E470A270 E 47UF, 25V
C2315ECA1EM471BE 470UF, 25V
C2321F1J1H102A018 E 1000UF, 50V
C2322F1J1H102A018 E 1000UF, 50V
C2325F2A1C470A310 E 47UF, 16V
C2326F2A1C470A310 E 47UF, 16V
C2328F1J1E474A101 C 0.47UF, 25V
C2329F1J1E474A101 C 0.47UF, 25V
C253ECEA1HN2R2UE 2.2UF, 50V
C254F1J1H102A018 E 1000UF, 50V
C257ECEA1HN2R2UE 2.2UF, 50V
C258F1J1H102A018 E 1000UF, 50V
C301ECJ2VB1C104K C 0.1UF, K, 16V
C302ECJ2VB1C104K C 0.1UF, K, 16V
C3023ECJ1VF1C105Z C 1UF, Z, 16V
C3024ECJ1VF1C105Z C 1UF, Z, 16V
C3025ECJ1VF1C105Z C 1UF, Z, 16V
C3027ECJ1VF1C105Z C 1UF, Z, 16V
C303ECJ2VB1C104K C 0.1UF, K, 16V
C3034ECA1AM471BE 470UF, 10V
C305F2A1C4710045 E 470UF, 16V
C306D0GB240JA008 E 1000UF, 50V
C307D0GB240JA008 E 1000UF, 50V
Part No.Part Name & DescriptionRemarks
EUR7717040RREMOTE CONTROL
K2JZ2B000021 ANTENNA PLUG
TES4G214SPRING (POWER BUTTON)
TES4G406COIL SPRING
TES4G409-1SPRING (DOOR)
THT4G1011JSCREW (SPEAKER)
THT4G10139SCREW
TMM4G503RUBBER WEDGE
TMM4G902-3RUBBER WASHER
TPD4G1169-2CUSHION (TOP)
TPD4G2148-2CUSHION (BOTTOM)
TPE4G14023SET COVER
TPE4G14024TOP COVER
TQB4G5031FAN BAG
TSMA011MAGNET
TSN63115-4PURITY MAGNET
TSX4G196L-1AC POWER CORD
TXFPC01DQ08CARTON
CAPACITORS
Ref.
No.
C308D0GB240JA008 E 1000UF, 50V
C3155F1J1H103A590 C 0.01UF, J, 50V
C3156ECA1CM101BE 100UF, 16V
C3157ECA1CM101BE 100UF, 16V
C3163F2A1C101A310 E 100UF, 16V
C3164F2A1C101A310 E 100UF, 16V
C3166ECJ1VF1C105Z C 1UF, Z, 16V
C3169ECJ1VF1C105Z C 1UF, Z, 16V
C355ECWF2334JSRP 0.33UF, J, 250V
C356ECJ2VC1H102J C 1000PF, J, 50V
C360ECKW3D102KBP C 1000PF, K, 2KV
C362ECEA1CN100UE 10UF, 16V
C363F2A1C331A159 E 330UF, 16V
C368ECA2EM100BE 10UF, 250V
C370ECJ2VF1H222Z C 2200PF, Z, 50V
C371ECJ2VF1H222Z C 2200PF, Z, 50V
C372ECJ2VF1H222Z C 2200PF, Z, 50V
C375ECWF2154JSRP 0.15UF, J, 250V
C401ECJ1VC1H560J C 56PF, J, 50V
C404ECQB1222JFP 2200PF, J, 100V
C406F2A1H221A247 E 220UF, 50V
C407ECJ1VC1H560J C 56PF, J, 50V
C408ECQB1154JFP 0.15UF, J, 100V
C454ECQV1H154JMP 0.15UF, J, 50V
C4850F2A1C101A310 E 100UF, 16V
C4851F2A1C471A339 E 470UF, 16V
C4852ECJ1VC1H101J C 100PF, J, 50V
C502ECKR3A821KBP C 820PF, K, 1KV
C504F1J1H681A590 C 680PF, J, 50V
C507ECJ1VF1C105Z C 1UF, Z, 16V
C511ECA1VM101BE 100UF, 35V
C512F1B2H471A025 C 470PF, 500V
C513F1B2H331A025 C 330PF, 500V
C514F2A1E102A225 E 1000UF, 25V
C515F1B2H331A025 C 330PF, 500V
C516F2A1E102A225 E 1000UF, 25V
C519F2A2C2210013 E 220UF, 160V
C520F2A0J221A317 E 220UF, 6.3V
C552ECA2EM100BE 10UF, 250V
C553F0C2E684A040 P 0.68UF, 250V
C554F0C2E684A040 P 0.68UF, 250V
C555ECWF2564JSBP 0.56UF, 250V
C559ECWH20133JVB P 0.013UF, 2kV
C560ECQF4273JZHP 0.027UF, 400V
C561ECWH20202JVY P 2000PF, 2kV
C565F0A1H273A039 CAPACITOR
C566ECQM4472JZP 4700PF, J,400V
C568F0C3D102A003 P 1000PF, 2kV
C601F1J1H183A021 C 0.018UF, 50V
C602ECJ1VB1H222K C 2200PF, K, 50V
C604F2A1C101A310 E 100UF, 16V
C606ECJ1VF1H104Z C 0.1UF, Z, 50V
C607ECJ1VF1H103Z C 0.01UF, Z, 50V
C611ECJ1VF1H104Z C 0.1UF, Z, 50V
C613ECJ1VF1H104Z C 0.1UF, Z, 50V
C614ECJ1VC1H100C C 10PF, C, 50V
C615ECJ1VC1H100C C 10PF, C, 50V
C616F2A1C101A310 E 100UF, 16V
C618F2A1C101A310 E 100UF, 16V
C619F2A1C101A310 E 100UF, 16V
C620ECJ1VB1H333K C 0.033UF, K, 50V
C621ECA1CM100BE 10UF, 16V
C622F2A1C101A310 E 100UF, 16V
C623F2A1C101A310 E 100UF, 16V
C626F2A1C101A310 E 100UF, 16V
C627F2A1C101A310 E 100UF, 16V
C628F2A1A471A274 E 470UF, 10V
C630ECJ1VF1H103Z C 0.01UF, Z, 50V
C631ECJ1VB1H333K C 0.033UF, K, 50V
C632F2A1H4R7A317 E 4.7UF, 50V
C633ECJ1VC1H471J C 470PF, J, 50V
C634ECJ1VC1H471J C 470PF, J, 50V
C635F2A1C101A310 E 100UF, 16V
Part No.Part Name & DescriptionRemarks
26
Page 27
TC-29FX20P
Ref.
No.
C639ECJ1VF1H104Z C 0.1UF, Z, 50V
C640ECJ1VF1H104Z C 0.1UF, Z, 50V
C642ECJ1VF1H104Z C 0.1UF, Z, 50V
C645ECJ1VF1H104Z C 0.1UF, Z, 50V
C646ECJ1VF1H104Z C 0.1UF, Z, 50V
C650ECA1CM331BE 330UF, 16V
C652ECJ1VF1H104Z C 0.1UF, Z, 50V
C654ECJ1VF1H104Z C 0.1UF, Z, 50V
C655ECJ1VF1H104Z C 0.1UF, Z, 50V
C656ECJ1VC1H270J C 27PF, J, 50V
C657ECJ1VC1H560J C 56PF, J, 50V
C662F2A0J101A317 E 100UF, 6.3V
C665ECJ1VC1H150J C 15PF, J, 50V
C666ECJ1VC1H150J C 15PF, J, 50V
C667ECJ1VC1H180J C 18PF, J, 50V
C668ECJ1VC1H180J C 18PF, J, 50V
C704F1B2H471A025 C 470PF, 500V
C706ECQM4222JZP 2200PF, 400V
C818ECQB1H104JFP 0.1UF, 50V
C821ECKW3D681KBP C 680PF, K, 2KV
C822ECKCNA472ME7 C 4700PF, M,
C824F1A2E331A002 C 330PF, M,
C825F1A2E331A002 C 330PF, M,
C826F0A1H103A039 CAPACITOR
C827ECQB1H333JFP 0.033UF, J, 50V
C840ECKCNA471MB7 C 470PF, M,
C841ECKW3D151KBR C 150PF, K, 2KV
C842F2A1H2200033 E 22UF, 50V
C843F2A1E222A224 E 2200UF, 25V
C848ECQB1H222JFP 2200PF, J, 50V
C849F1B2H471A025 C 470PF, 500V
C850ECKCNA471MB7 C 470PF, M,
C851F0A1H103A039 CAPACITOR
C854ECKWAE472ZED C 4700PF, Z,500V
C855ECKWAE472ZED C 4700PF, Z,500V
C856F2B2G4710006 E 470UF, 400V
C857ECQM4473JZP 0.047UF, J,400V
C859ECKW3D821KBP C 820PF, K, 2KV
C863F2A1C4710045 E 470UF, 16V
C864ECKCNA152ME7 C 1500PF, M,
C865ECKW3D331JBP C 330PF, J, 2KV
C867F2A2C2210013 E 220UF, 160V
C869ECJ1VC1H151J C 150PF, J, 50V
C870F2A1C472A260 E 4700UF, 16V
C871F1B2H471A025 C 470PF, 500V
C872F2A1C332A260 E 3300UF, 16V
C873L6Y5P4B122KC 1200PF, K,500V
C875F1J1H332A021 C 3300PF, 50V
C877F2A1C1000079 E 10UF, 16V
C879F2A0J331A260 E 330UF, 6.3V
C882F2A1C101A310 E 100UF, 16V
C884F2A1C332A182 E 3300UF, 16V
C886F2A1H330A342 E 33UF, 50V
C887F2A1C102A159 E 1000UF, 16V
C890ECQB1H104KFP 0.1UF, K, 50V
C891F2A1C101A310 E 100UF, 16V
C892F1J1H332A021 C 3300PF, 50V
C893ECA1CM221BE 220UF, 16V
C894F0CAF2240003 CAP 250VAC 0.22UF
C895F0CAF2240003 CAP 250VAC 0.22UF
C897F1J1H332A021 C 3300PF, 50V
C898ECJ1VF1C105Z C 1UF, Z, 16V
C904F1B1H103A013 C 0.01UF, 50V
C912F1J1H104A578 C 0.1UF, 50V
C952ECA1HHG100E 10UF, 50V
C953F1B1H103A013 C 0.01UF, 50V
C958ECA2CM470BE 47UF, 160V
C959F1B2H1030028 C 0.01UF, 500V
C960F1A2H151A035 C 150PF, 500V
C961F2A2A1000016 C 10UF, 100V
C962F1B2H1030028 C 0.01UF, 500V
C963F1A2H151A035 C 150PF, 500V
C964ECA1CHG101E 100UF, 16V
IC1101 TVR4GAS512EEPROM IC
IC2301 C0ZAZ0000164 IC
IC351TDA6108JF/N1 IC
IC451AN15526AIC
IC4850 AN15530BIC
IC601TVR4G20-6FLASH MEMORY IC
IC605C0ZAZ0000162 IC
IC801C5HABZZ00168 IC, HYBRID
IC802C0EAS0000026 IC
IC851C0DAEJG00001 IC, POWER SUPPLY
Part No.Part Name & DescriptionRemarks
DIODES
INTEDGRATED
CIRCUITS
27
Page 28
TC-29FX20P
Ref.
No.
IC853C0DAEJG00001 IC, POWER SUPPLY
IC857C0DBEHE00005 IC, POWER SUPPLY
IC860B3PAA0000363 PHOTO COUPLER
IC871C0DAEJG00001 IC, POWER SUPPLY
IC875C0DBEHE00005 IC, POWER SUPPLY