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PANASONIC 28XD4/A
General Information Also Covers 25XD4/A Euro 4 Chassis Recommended Safety Parts
Item
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X-Ray Note
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. ADJUSTMENT PROCEDURE The remote control is used for entering and storing adjustments, with the exception of Cutoff 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. 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. 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. 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. 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 :-

Complete

Adjustment Procedures

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. The screen will show :Program External>>TV 3. Press the STR button on the TV. The screen will show :-

Description

Part No.
ENG27506G TNP8EH002AA TNP8EN015AA TNP8EY012AC TSX8E0025 ZTUZAE550A 232266296706 TQB8E2553-1 19181-3.15 ZTFL94002A ETP35KAN619U ERF7ZK4R7 ERQ14AJ101 ERF7ZK4R7 ERQ12AJ121 ERQ1ABJP5R1 ERW2PK1R2 ERG1FJ271P ERDS1FJ152 ERQ12HKR33 ERQ12HKR33 ERF7ZK1R0 ERQ12AJ101 ERQ12HJ8R2 ERG2FJ821 ERW2PKR33 ERW2PKR33 ERD75TAJ825 ERF7ZK2R7 ERG2FJ223 ERQ1CJP2R2 ERW2PKR56 ERQ14AJW390 ERQ14AJW390 ERDS1FJ390 ERDS1FJ471 ERDS1FJ390 ERQ14AJW3R9 ERQ1CJP331 ERG2FJ221 ERG2FJ221 ECKC3D152J ECWF2H514J ECKC2H471J ECWF2H684J ECKC2H101J ECKC2H471J ECKC2H471J ECKC2H102J ECKC2H472J ECKC2H472J ECKC2H472J ECKC2H472J ECOS2GG181NG ECKC3D102J ECQE6104K ECKC3D471JB ECKC2H471J ECKC2H471J ECKC2H471J ECKC2H472J ECKC2H472J ESB92S11B TKU8E00310 A59ECF50X41 TKY8E150 TLK8E05138 TNP8EE009BC TQF8E2671 ECKC3D152J TKU8E00320 A66ECF50X41 TKY8E160 TLK8E05140 TNP8EE009AU TQF8E2661 ECKC3D122J

TUNER H P.C.B. N P.C.B. Y P.C.B. POWER CORD ANODE LEAD R802 THERMISTOR ENGLISH F802 FUSE T551 F.B.T. T802 TRANSFORMER R267 WOUND R269 METAL R272 WOUND R372 FUSIBLE R377 METAL R461 WOUND R507 METAL R510 CARBON R555 METAL R559 METAL R567 WOUND R701 FUSIBLE R702 FUSIBLE R703 METAL R810 WOUND R811 WOUND R812 CARBON R813 WOUND R854 METAL R860 FUSIBLE R877 WOUND R919 FUSIBLE R920 FUSIBLE R924 CARBON R929 CARBON R931 CARBON R935 FUSIBLE R936 FUSIBLE R3103 METAL R3104 METAL C360 CERAMIC C554 FILM C557 CERAMIC C559 FILM C562 CERAMIC C566 CERAMIC C568 CERAMIC C569 CERAMIC C807 CERAMIC C808 CERAMIC C809 CERAMIC C810 CERAMIC C811 ELECT C814 CERAMIC C817 FILM C850 CERAMIC C853 CERAMIC C855 CERAMIC C857 CERAMIC C909 CERAMIC C910 CERAMIC S801 SWITCH DIFFERENCES FOR MODEL TX-25XD4/A 16 BACK COVER 17 C.R.T. 18 CABINET 19 DEGAUSS COIL 20 E P.C.B. 22 MODEL LABEL C551 CERAMIC DIFFERENCES FOR MODEL TX-28XD4/A 16 BACK COVER 17 C.R.T. 18 CABINET 19 DEGAUSS COIL 20 E P.C.B. 22 MODEL LABEL C551 CERAMIC

Adjustment Settings
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 !!

7W 0.25W 7W 0.5W 0.5W 2W 1W 0.5W 0.5W 0.5W 7W 0.5W 0.5W 2W 2W 2W 0.75W 7W 2W 1W 2W 0.25W 0.25W 0.5W 0.5W 0.5W 0.25W 1W 2W 2W 2KV 500V 500V 500V 500V 500V 500V 500V 500V 500V 500V 500V 400V 2KV 600V 2KV 500V 500V 500V 500V 500V

10% 5% 10% 5% 5% 10% 5% 5% 5% 5% 10% 5% 5% 5% 20% 20% 5% 20% 5% 10% 10% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1.5nF 68nF 470pF 470µF 100pF 470pF 470pF 1nF 4.7nF 4.7nF 4.7nF 4.7nF 180µF 1nF 100nF 470pF 470pF 470pF 470pF 4.7nF 4.7nF

4R7 OHM 100 OHM 4R7 OHM 120 OHM 5R1 OHM 1R2 OHM 270 OHM 1K5 OHM R33 OHM R33 OHM 1 OHM 100 OHM 8R2 OHM 820 OHM R33 OHM R33 OHM 8M2 OHM 2R7 OHM 22K OHM 2R2 OHM R56 OHM 39 OHM 39 OHM 39 OHM 470 OHM 39 OHM 3R9 OHM 330 OHM 220 OHM 220 OHM

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. 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 button on the remote control. To the STATUS 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.".

2KV

1.5nF

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:-

2KV

1.2nF

Vert Out IC601 Pin 31

Vert Drive IC451 Pin 2

VFLB IC451 Pin 3

0.7V

57V

20mS 20mS 20mS

H - Out IC601 Pin 50

H - Out IC701 Pin 5

H - Pulse Base Q503

3V

30mV

64µS 64µS

2V

1V

64µS

HFLB IC601 Pin 13

HFLB IC701 Pin 8

Video Out IC601 Pin 59

1.5V

6.2V

2V

64µS 64µS 64µS

R - Out IC601 Pin 37

G - Out IC601 Pin 38

B - Out IC601 Pin 39

275mV

275mV

64µS

64µS

275mV

64µS

R - Out E8 Pin 5

G - Out E8 Pin 3

B - Out E8 Pin 4

4.6V

64µS

4.4V

4.6V

64µS

64µS

SCL IC1201 Pin 3

SVM Out IC601 Pin 34

3.7V

13µS 64µS

88mV