IBM 3277 Troubleshooting Manual page 111

Display station models 1 and 2
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I
Old
Style
PN 2686238
I
=n
his
eoov
on
it.
No
.u.mpt
should
be
INde
to
_.thi.voI .....
P1 (AI
. ' "
Horiz Drive to Yote (Flyblc:kl-- 8
Horiz
R . . . .
to Horiz Yoke - -
5
Yoke Up
Winding
..
+IV to Yoke
t ;
Yoke
Down
Winding------
P2IBt
Not Used
PlICI
+34V
to
HV Supply - - - - - - 9
HV Enible Line
a
Horiz
Ind
InL DC Gnd In
7
+34Vln
8
·12V In
6
+8V In
4
Vert DC Gnd In
3
+12V Test Point
2
'OR Input ( A n I I o g I - - - - -
Diagram 7·16. Analog Card (Sheet 1 of 2)
Tnt
Poinu
WIDTH
INTEN
CRTPb
NIDI
1
+IV
to Brithtnftl
Pot
2
WI.., .
Brithtnftl
Pot
3
+60V
erightMss
Pot
..
CRTGrid
5
DC Gnd to Audlbl. Alerm-
6
CRT Cethodt
7
Spere
a
-Vert Skip (Bumpl In
9
Sper.
10
+Vert
RmlCl
11
+5V in (Flit 51
12
+Unblank CRT
13
DC Gnd
from logic BoIrd
14
+Horiz Sync
16
Duel Intensity (+Britht, . Normel'
16
-Audibl. Alarm from
Logic-
17
Wiper
of Contrllt Pot
18
Contrllt
Pot
19
-Audible Alum to Alarm-
20
+6V to Audible Alarm-
21
POR
to Logic
Note:
PN 2586238 will
be , . . . , by
PN 2586080 .. nIIdId
in
Cfte
of
failure.
Thil il' directly repflCUbfe FRU.
--Future

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