Fujitsu Plasmavision PDS4208W-B, Руководство по обслуживанию

Страница: 19 / 51

RGB input is abnormal.
Power lamp: Lighted green
(10 sec or more)
Check 7
Start
Separate signal Composite signal
No
Yes
Yes
Yes
Sync. on green signal
Yes
Yes (ANALOG)
Yes (TTL)
Yes
No
No
No
Is RGB
cable pin arrangement
appropriate ?
What kind of
signal is output from signal
source ?
Is composite sync.
signal input to pin
w
of RGB
cable ?
Is composite sync.
signal input to pin
!3
of RGB
cable ?
Is sync. switch
(TTL/ANALOG) selected
correctly ?
Is sync.
signal polarity
negative ?
Is horizontal sync.
signal input to pin
!3
and vertical sync.
signal input to pin
!4
of
RGB cable ?
Check connection cable.
Check input signal.
Connect RGB cable
to terminal.
Check input signal.
No
Change sync.switch (TTL/ANALOG)
Make sync. signal polarity output
from signal source negative, or make
output impedance TTL.
Note(
∗
) : If the sync signal cannot be identified by
TTL level, measure it in the 75
Ω
terminated state.
No
No
Check input signal.
No
Check input signal.
Is frequency of horizontal sync.
and the vertical sync signals
within specified range ?
Is input level(
∗
) within specified
range ?
Yes
Signal processing circuit faulty.
Replace Main/Digital PCB Assy.
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