Service Hints
Symptom:
No picture (black Screen)
Suggestion:
The use of a
magnifying glass
can help localize the defective
printed circuit board. Use the
magnifying glass to take a close
look at the pixels of the screen.
Figure 25
1. If the pixels are
totally dark
, the
defect is most likely located in
one of the following boards:
a) SC-Board
b) SU-Board
c) SD-Board
1. Check the status of the LED located on the SC-Board; if the LED is dark, a
malfunction of the SC-Board is suspected.
2. Listen to the buzz noise of the SC board; if the buzz noise is not present, a
malfunction of the SC-Board is suspected.
Suggestions:
Check the
Scan pulse waveform at
TPSC1. (Use TPSS1 of the
SS-board to trigger the
oscilloscope.)
Verify the input signals at
connector SC2, SC23, and
SC20.
Verify that the signals of the
clock and serial data lines
from the D-board are present
at connector SC20.
TPSC1
TPSS1
Figure 26
Figure 27
47
Summary of Contents for TH37PA20U - 37" SDTV PLASMA DISPLAY
Page 2: ...2 ...
Page 6: ...6 ...
Page 25: ...SC Board Explanation Figure 12 25 ...
Page 29: ...Figure 16 29 ...
Page 56: ...Test Point locations Figure 38 56 ...
Page 60: ...I2 C Menu Structure The values indicated in this flowchart are sampled data Figure 41 60 ...
