TC-29V10N - Panasonic TV Service Manual (repair manual). Page 5

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Display method
Display position
Hold [     ] (OFF TIMER) on the 
remote control pressed and 
press [VOL -] on the TV set.
(The reception screen switches 
to TV monitor, and a screen as 
shown on the right appears.)
When one of the buttons for 
channel selection etc. is 
operated, the display returns to 
the normal screen.
When display is desired
To return to normal display
[VOL -]
[OFF TIMER]
Press simultaneously.
Operation panel in
the remote control
H10 UV
OK
H30 AVSW
OK
H36 IC301
OK
H90 
OK
H21 
OK
F30 AV SW
OK
H46 Y/C
OK
H55
H58
H56
H99
H57
Magenta
Red
Yellow
Green
Blue
Display at the time of a fault
Operation part on the main unit
Panas
1
2
In regard to the self-check function
When phenomena like “the power fails from time to time” or “the video/audio fails from time to time” can not be confirmed at the
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.
Also, when “the power fails from time to time”, display of the color bar on the screen can be used confirm the occurrence and to
limit the scope for the defective circuits.
Display method and display position
Display phenomenon and treatment method
Display 
symbol
Phenomenon, condition
Treatment method
H10
No output of video and audio.
Exchange the tuner (TNR001).
H21
Audio stop. Surround function not effective.
Inspect  the  board  [Z]  IC2401  (audio  compensa-
tion).
H30
No video and audio. Surround function not effective.
Detection the board [A] IC3001 (Input switch).
H36
No video. Wrong colors. No horizontal/vertical synchroniza-
tion.
Detection the board [A] IC301 (video signal pro-
cessing ).
H46
No video. No raster. Wrong colors.
Inspect the digital core board [DG] IC6601.
H55
The red bar is displayed momentarily and then the power is
interrupted. The power signal lamp (red) flashes three
times in intervals of 2.8 sec.
Detection of overcurrent (140V line), vertical out-
put.
H56
The yellow bar is displayed for 0.5 sec., and then the power
is interrupted. The power signal lamp (red) flashes twice in
intervals of 3.3 sec.
“Power failure from time to time” because of the
overcurrent (140V line), vertical output (+15V line).
H57
The green bar is displayed for 1 sec., and then the power is
interrupted. The power signal lamp (red) flashes once in
intervals of 3.8 sec.
“Power failure from time to time” because of the
overcurrent (140V line), vertical output (+15V line).
H58
Abnormal power circuit. The power does not come up, and
it is switched off after a few seconds. The power signal
lamp (red) flashes successive in intervals of 0.3 sec.
Detection the switching trans on the secondary
side of the +B line.
H90
The memory gets lost.
Exchange the main board [A] IC1114 (memory).
H99
“No video from time to time” because of causes in the
antenna~tuner~video circuit.
*This also may be displayed when the antenna plug is dis-
connected or when a channel without a signal is received.
Inspect the tuner~video circuit.
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