IBM 3278 Series Maintenance Information page 45

D E
2 2
012
MAP 02
Display MAP
PAGE 3 OF 19
Exchange and adjust the 01 AI A 1 H2 card.
Is the problem still present?
N
013
Reconnect coax signal cable, feature card(s).
Verify correct operation.
Identify new problem if present.
014
Verify the following:
1. Cable and connectors from analog card to
CRT base socket (Figure 4-14).
2. Cable and connectors from analog card to
intensity control potentiometer (Figure 4-13).
3. Intensity control potentiometer.
4. Intensity override switch (Spring loaded).
5. Possible short circuited CRT
6. Reconnect coax signal cable, feature card(s).
015
Is the display on the screen normal? (Good
characters, in focus and normal size. Use
intensity override if necessary to determine size
and condition of raster)
N
016
Is display size or focus a problem? (Use N
path if raster problem)
4 4
F G
N
017
Go to Page 5, Step 028, Entry Point B.
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