Advertisement
K
3
145
POWER MAP
PAGE
5 OF
-Switch power OFF
~.
-Reconnect the logic gate A3 cable.
-Remove the EHT cable from the LOPT on
the analog card.
See MIM section
4.5.4
para6.
The free end of the EHT
cable is safe - let
it
remain in the
bottom of the box.
-Reinstall the analog card.
-Switch power ON
~.
Is the +5 v supply now present?
Y N
046
There is probably a short circuit on
the analog card.
-Switch power OFF
~.
-First disconnect both the audible
alarm connector pa and the bezel
lamps card connector P12.
See
Figure 1-2.
-Switch power ON
~and
test.
-Switch power OFF
~
if
the problem
remains, and exchange the analog
card.
GO TO MAP
0000.
ENTRY POINT
BB.
47
-Switch power OFF
~
and remove the
power cord from the mainline power
socket.
-Exchange the bleed assembly.
(See
MIM section
4.8.4.)
-If the problem is still present,
exchange the CRT.
GO TO MAP
0000.
ENTRY POINT
BB.
048
-Switch power OFF
~.
-Exchange the amplifier card.
-See
MIM
Chapter
5
to make adjustments.
GO TO MAP
0000.
ENTRY POINT
BB.
49
-Switch power OFF
~.
-Reconnect the amplifier card connector
P18.
Does this display have a selector pen
installed?
i
il::j
~,\:,'l~:
051
-Remove the selector pen logic card G4.
-Switch power ON
m.
Is the +5 V supply now present?
Y N
T U
H
3
T U
MAP
0200-5
I
052
-Reinstall the selector pen card.
(ENTRY POINT DOl
-Remove the convergence logic
ca~d
B2.
-Switch power
ON
m.
Is the +S V supply now present'
Y N
053
There seems to be a short circuit
in the wiring of the the +12V and
-12 V supplies to the selector pen
card.
The problem may be present
even
if
there is no selector pen
installed.
-Switch power OFF
~
and
seQ Figure
6-16.
Repair any problem.
GO TO MAP
0000.
ENTRY POINT
BB.
054
-Exchange logic card B2.
GO TO MAP
0000.
ENTRY POINT
BB.
055
-Exchange logic card G4.
GO TO MAP
0000.
ENTRY POINT
BB.
056
-Switch power OFF
~.
-Exchange the video card.
If the
problem remains, verify the connections
to
the video card shown in Figure 6-7.
-Repair any problem.
GO TO MAP
0000.
ENTRY POINT
BB.
057
Can the TEST MODE 1 pattern now be
displayed?
Y N
058
-There is a slight overload on the power
supply - the analog card is probably
failing.
Leave the keyboard
disconnected and
GO TO MAP
0100.
ENTRY POINT
BB.
059
-Switch power OFF
~.
-Meter the keyboard cable for short
circuits (Figure 6-12) and repair as
necessary.
-If no problem,
exchange the keyboard
logic card.
Another possible failure is a slight
overload on the power supply; removing a
FRU
has lowered the current within
tolerance.
See MIM section 3.1.
GO TO MAP
0000.
ENTRY POINT BB.
04FEB81
MAP
0200-5
Advertisement
