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s
}>
-0
0
:::r
"'
;:i
(/!
rv
I
w
-
c
Displayed address does not match
0
N
the switches
D
I
T
Missing attribute (620)
I
0
N
Line check counter is greater than 5
s
N
All keys fail to display from
0
keyboard
R
M
Fails to blank data
A
L
Keyboard problems
w
I
Display mode function failure
T
H
Wrong characters displayed for
p
keys pressed
0
Missing dots on characters
w
E
IPL sign-on displayed in place of
R
USER ID sign-on.
0
Cursor select or row and column
N
failure
Blank Screen
I
Power off
Set address (420),
Press and hold a key
Planar/1/0 assembly (347,
Power on
348)
Attribute fails and no status line
Planar (34 7)
errors (520)
Call system operator to check the
Failing network/Terminator
network
switch (423)
Keylock (RPQ) is unlocked
Planar /Keylock (347, 346)
Keylock (RPQ) is locked
Planar/Keylock (347, 346)
Row, column, or single key or
Planar /Keyboard (347, 140)
column failures, missing dots, etc.
Fails to reverse image
Planar (347)
Some keys
fail.
No status line
Planar (347)
errors (520)
Planar (34 7)
Nond1splay attribute failed (620,A 11
Planar (347)
Keyboard is OK
Planar (347)
Check the +15 Vdc at the planar
If missing replace power
test point (312).
supply board (345)
Display (240)
Planar (34 71
1/0 assembly (348)
MAP Chart 2
CHECK THE ALARM
If the alarm does not sound, do the following:
Power off.
Remove the lower unit cover (341 ).
Disconnect the alarm wires from the planar connector (312).
Use a CE meter on the +6 Vdc scale.
Measure across the connector pins 1
{+)
and 3(-).
Power on.
The meter should deflect right-left-right. If deflection is correct, go to MIM 354,
otherwise use MAP Chart 2.
Symptom
Checks or Comments
Repair Action
p
s
O-e
Keyboard ID field equals LU (520)
Check the address switch settings
Planar/1/0 assembly (347,
..
-
(421)
348)
WR
E
Wide band of horizontal lines in
Lines may or may not be rolling
Power supply board (345)
R E
center of screen
Planar (347)
E
0
N
Unstable horizontal lines
Not full screen
Power supply board (345)
N
Planar (347)
D N
Failing +5 Vdc (311)
1. Fuse 2 is OK
Power supply board (345)
I
0
Full raster vertically with bright
Planar (34 7)
A T
horizontal bands on top and
G
bottom; not stable
2. lf fuse 2 is blown, disconnect
If fuse 2 does not blow
N
the keyboard ( 142) and replace
again, check the
0
B
fuse
2.
cable/replace the
s
L
keyboard (140).
If fuse 2 blows again,
T A
replace the power supply
I
N
board/planar (345, 347)
c
s
K
All of the above OK
Planar (347)
D
I
B
D
Check the following in sequence.
L
N A
1. Fuse 1 is blown (310, 331)
Fuse 1
0
N
2. No AC voltage at TB 1 (310, 331)
Check for an open in line cord
Line cord/primary power
T
K
Measure across TB 1-1 and 2
assembly 1349)
c
3. 24 Vac is zero (311)
Open transformer
Power supply transformer
0
s
Measure Jl-5 to Jl-6
(344)
M
c
p
4. DC voltage failure (332)
+5 Vdc is less than 1.0 Vdc
Planar /power supply
L R
+15 Vdc is less than 6.0 Vdc
board 1347. 345)
E E
5. 24 Vac is low (311)
T
E
Open capacitor
AC capacitor (343)
Measure Jl-5 to Jl-6
E N
6. Power-on reset failure (312)
Planar POR test point does not read
Planar
I
power supply
+5 Vdc (4.6-5.5)
board (347, 345)
7. All of the above OK
Planar (347)
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