Panasonic TX-29F355H Bedienungsanleitung

Power Source : AC SINGLE 220V, 50Hz

Power Consumption : 110W

Aerial Impedance : 75Ωunbalanced

Coaxial type

Receiving System : 17 Systems

Receiving Channels :

VHF

2-12 PAL/SECAM B, K1

0-12 PAL B (AUST.)

1-9 PAL B (N.Z.)

1-12 PAL/SECAM D

1-12 NTSC M (JAPAN)

2-13 NTSC M (U.S.A)

UHF

21 - 69 PAL G, H, I/SECAM G, K, K1

28 - 69 PAL B (AUST.)

13 - 57 PAL D, K

13 - 62 NTSC M (JAPAN)

14 - 69 NTSC M (U.S.A.)

CATV

S1 - S20 (OSCAR)

1 - 125 (U.S.A. CATV)

C13 - C49 (JAPAN)

S21 - C41 (HYPER)

Z1 - Z37 (CHINA)

5A, 9A (AUST.)

Intermediate Frequency :

rights reserved. Unauthorized copying and

distribution is a violation of law.

TX-29F355H

GP21 Chassis

Video 38.0 MHz

Sound 31.5 MHz (D, K, K1)

32 MHz (I)

32.5 MHz (B, G)

33.5 MHz (M)

Colour 33.57 MHz (PAL)

33.6 MHz (SECAM)

33.75 MHz (SECAM)

34.42 MHz (NTSC)

Video / Terminals :

AV 1, 2 Y:1 Vp-p, 75Ω

S-Video In C:0.3 Vp-p, 75Ω

DVD

Y1.0 Vp-p, 75Ω

PB 0.7 Vp-p, 75Ω

YR 0.7 Vp-p, 75Ω

AV 1, 2, 3, 4

Video In 1 Vp-p, 75Ω

Audio In Approx. 0.5V, 47kΩ

Monitor Out Video Out 1 Vp-p, 75Ω

Audio Out Approx. 0.5V, 1kΩ

High Voltage : 31.0±1.0V

at zero beam current

Picture Tube : A68LZU185X-E

67.6cm (29 inches)

Measured diagonally,

Colour Television

Specifications

ORDER NO. MTV0601443CE

90° deflection

Audio Output : 10W+10W = 20W

Dimensions : Height : 578 mm

Width : 786 mm

Depth : 508 mm

1 Safety Precautions 3

1.1. General Guide Lines 3

1.2. Leakage Current Cold Check 3

1.3. Leakage Current Hot Check (Fig. 1) 3

1.4. X-Radiation 3

1.5. GP21 Chassis Block Diagram 4

2 Service Hints 5

2.1. Service Position for E-Board 5

2.2. Factory Mode Adjustment 5

2.3. Adjustment for White Balance 6

2.4. Adjustment for CRT CUT OFF 6

2.5. Adjustment Procedure 7

Mass : 43 kg (Net Wt.)

Specifications are subject to change without notice.

Mass and dimensions shown are approximate.

2.6. PAL Colour 8

2.7. Adjustment 8

3 Conductor Views 12

4 Schematic Diagram 13

4.1. D Board 15

4.2. A Board 21

4.3. L Board 26

4.4. G Board 30

5 Parts Locations 33

6 Replacement Parts List 34

6.1. Replacement Parts List 35

CONTENTS

Page Page

TX-29F355H

1 Safety Precautions

1.1. General Guide Lines

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, especially 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 32.0kV is 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

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.

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 32.0kV without causing X-Radiation.

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 31.0±1.0kV. If the meter indication is out of tolerance, immediate service

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.

TX-29F355H

1.5. GP21 Chassis Block Diagram

SDA

SCL

RGB In

CVBS Out

Video In

MON Out

CVBS In

VCTP

Audio

Amp.

Audio

Amp.

VCTP

PVP

DDP

CRT

Board defl.coil CRT

Tuner

GP21 BLOCK DIAGRAM

Audio

15V

(Audio Amp)

15V

10.5V

6.5V

137V

10.5V

(H-Drive Circuit)

3.3V

standby

1.8V

standby

6.5V

(G-Board)

13.3V

137V

Switching

Transformer

Primary

Live

Circuit

MON

Audio

Out Audio

Out

Audio Amp

(Woofer)

left speaker

right speaker

woofer

option line

Indication

option device

RGB Out

reg

Q865

RGB Out

Vert

H Out

H-Output

EEPROM

RGB Out

CVBS In

Vertical

Output

RGB In

TX-29F355H

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.

Fig. 2

2.2. Factory Mode Adjustment

How to set : To set the Factory mode, press Volume 0 dac on the TV and Timer Setting 30 min. on

the remote control and press Volume (-) Down button on the TV together press recall on

the remote control.

CHK should appear on right of TV screen.

To Set Self-Check : Press the Volume Down button on TV then press the Off Timer button on remote

control.

TX-29F355H

2.3. 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 analyzer receiver unit to CRT face.

Adjustment of Low Light.

1. Adjustment Sub Bright, so that Y = 6.5 ± 1.0 nit.

2. Adjustment R-CUT OFF, so that X = 0.241 ± 0.005 nit.

3. Adjustment G-CUT OFF, so that Y = 0.241 ± 0.005 nit.

Adjustment of High Light

1. Adjustment Sub Bright, so that Y = 190 nit.

2. Adjustment R-Drive, so that X = 0.255 ± 0.003 nit.

3. Adjustment B-Drive, so that Y = 0.258 ± 0.003 nit.

2.4. Adjustment for CRT CUT OFF

Preparation:

1. Connect the oscilloscope probe to TPL7.

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” until 1-H Line appears.

TX-29F355H

2.5.1. +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 :

TPD 023 ~ GND : 136.0V ± 1V

TPD 021 ~ GND : 10.8V ± 1V

TPD 012 ~ C858(-) : 16.5 ± 2V

2.5.2. 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 TPD 023 and confirm the

+B voltage is 136.0 ± 1V.

2. Connect a high frequency voltmeter to heater and confirm

that voltage reads 6.3 ± 0.3 (VRMS).

3. Normalize the brightness and contrast.

2.5. Adjustment Procedure

TX-29F355H

2.7. Adjustment

2.6. PAL Colour

1. Receive the PAL B/G studio colour bar pattern and adjust local frequency at the best tuned position.

2. Pic Menu: Dynamic Normal, Confirm Contrast - 100 DAC, Sub Contrast - 21 dac.

3. Channel colour set --------- STD

4. “CHK2” and press digit key “5” (AKB OFF) also confirm OSD become blue colour.

5. Set (A) to 0.3 ± 0.1V by BRT (CHK2) at measurement point TPL 2 Fig. 4.

1. Connect oscilloscope probe to TPL 7 (G OUT) with 10kΩseries resistor and adjust Contrast so that (B) as in Fig. 4 is 1.85 ±

0.2V.

2. Adjust “Sub Colour” so that waveform as in Fig. 4 (1) 2.5 ± 0.1V.

3. Connect oscilloscope probe to TPL 1 (R OUT) with 10kΩseries resistor and confirm waveform as in Fig. 5 is (2) 2.7 ± 0.4V.

4. Press digit key “5” (AKB ON) and confirm the OSD become white colour.

TX-29F355H

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.

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.

Convergence

1. Apply a crosshatch pattern signal and Normalize Contrast

control to the maximum positions.

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. 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.

Before Colour Purity, Convergence and White Balance adjustment are attempted,

V. Height, H. Centre and Focus adjustments must be completed.

TX-29F355H

Adjustment of CRT VRS

Preparation

a. Set DY to CRT not to tilt up and down left and right deflection.

b. Set CY to CRT and set CY magnet primarily (Fig. 1)

Purity magnet : Set purity magnet that 2 magnets are (TOP POSITION)

VRS magnet : Set purity magnet 2 magnets are (HORIZONTAL POSITION)

Adjustment

a. Receive that Cross Hatch pattern.

b. Adjust V-SHIFT -50Hz.

c. Set 2 magnets of horizontal position to up and down equally so that it will be the center part of CRT. (Fig. 2)

TX-29F355H

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