PDP-436SXE
118
1
2
3
4
1
2
3
4
C
D
F
A
B
E
No picture displayed when an RGB signal is input
No picture displayed when
an RGB signal is input 1.
Yes
Is the function corresponding
to selected signal input
selected?
No
Select the input select
function corresponding to
the signal being input.
Check the communications
between the CN4003 and
IC4806, and CN4003 and
the microcomputer.
No picture displayed when
an RGB signal is input 3.
Yes
Is the function corresponding
to selected signal input
selected?
Yes
Yes
Yes
No
No
No
Are the signals output from
IC4806?
(pin 30), (pin 32), (pin 34)
Check around IC4806 and
communication between
IC4806 and the
microcomputer.
No
Yes
Are communications
between the microcomputer
and each IC on the OBE
MAIN Assy OK?
Check the IC with a
communication failure and
around the microcomputer.
Yes
No
Does the symptom
disappear after the OBE
MAIN Assy is replaced?
Failure in the panel
Yes
No
Finished
Yes
Are the signals input to
IC4806? (pin 8), (pin 10),
(pin 12)
Yes
29
28
27
Are the signals detected at
IC6003?
(pin 160), (pin 164), (pin 172)
Check between IC4806 and
IC6003.
No
32
31
30
26
25
24
Are the signals input to
IC4806? (pin 2), (pin 4),
(pin 6)
23
22
21
