Diagnosis By Test Pattern When Osd Is Available - Panasonic TH-42PX75U Technical Manual

Diagnosis by Test Pattern When OSD is Available

<Purpose>
Picture problem such as "Picture Noise and or Vertical Line" displayed all over the screen is mainly caused
by a defective D or A board. The "internal Test Pattern Generator" can help determine whether to replace the D
or A board. The test patterns are created by the D board. Follow the steps below to confirm the operation of the
D or A boards.
<Model>
All Models
<Symptom>
Picture Noise, Full Vertical Line
<Diagnosis>
Pattern
Abnormal
Normal
<How to enter the Test Pattern>
1. While pressing "VOLUME-" button of the TV set,
press "RECALL" button of the remote control three
times within 3 seconds.
2. Push button "1" of the Remote Control several times
to select the "AGING" setting.
3. Press the number "3" button or the number "4"
button of the Remote Control to select the test
pattern.
Defective Board
D Board
A Board (or D board)
<Test Pattern (Normal)>
White (by A) White (by D)
Ramp white
Ramp red
Scroll A and B zone
<Test Pattern (Abnormal)>
Example Picture
29
Red Green
on/off Aging
Blue
Ramp blue
Ramp green
Color bar 1% window