Prima PH50D8, Руководство по обслуживанию

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2
5 -
4) TV no picture
normal no picture
normal abnormal
normal abnormal
.
normal normal abnormal normal abnormal
normal
Take out dual picture and set the other
picture to TV, to see if this picture is
normal.
Input an AV signal to see if AV channel
is normal
Check power supply
for
TUNER1, bus line and
video output circuit.
Check output signal of
N102(line/field synchronous,
clk, PEN etc.)
N204 and its
peripheral circuits
have problem
Peripheral circuits of
N501 V PORT have
problem
Input an AV signal to
see if the AV of dual
picture is normal.
If input VGAsignal is
normal
If voltage of N702
is normal
Input circuit of
N102 or interface
has problem
Check if output signals
of N204
（
line/field synch.
CLK, PEN
）
are normal
Check
N102and its
peripheral
TUNER
Check in the
sequence of 2
If the connection between
boards is reliable