TX-25AS1C, TX-25AS1M, TX-25AS1D, TX-25AS1F - Panasonic TV Service Manual (repair manual). Page 5

1.  Self-check is used to automatically check the bus lines and hexadecimal code of the TV set.
2.  To get into the Self-Check  mode press the down

(-/v) button on the customer controls at the front of the set, at the same time pressing the STATUS button on the remote
control, and the screen will show :-

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

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

1. Receive 

a 

Greyscale 

signal.

2.  Degauss the tube externally.
3.  Set the TV into Service Mode 1.
4.  Select Cutoff 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."

If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".

VDP

O.K.

TUN

O.K.

E2

O.K.

MSP

O.K.

DPL

- -

PCB

O.K.

Cab

O.K.

Sum

Factory use
only

OPTION1 3D

OPTION2 1C

OPTION3 0D

OPTION4 40

OPTION5 FF

OPTION6 E3

OPTION1 39

OPTION2 1C

OPTION3 0F

OPTION4 40

OPTION5 FF

OPTION6 E5

OPTION1 39

OPTION2 1C

OPTION3 0F

OPTION4 40

OPTION5 FD

OPTION6 E5