(
(
F F
N P
3 3
8 8
432
TAPE READ
MAP
PAGE 39
OF
45
-Install the tape control card (refer
to
202).
-Test
for
continuity from F6-AOZ (gnd)
to
N2-P08 (gnd).
Is
there
continuity
between
the
pins?
Y N
433
Pin
F6-A02 is part
of
the board ground
plane;
it
must be ground. Retry this
MAP:
Go
to
Page 2.
Step
007.
Entry
Point
B.
434
Check/replace the tape drive cable (refer
to
202).
435
-Test
for
continuity from tape control card pin
S08 (gnd) to N2-P08 (gnd).
Is
there
continuity
between
the
pins?
Y N
436
-Install the tape control card (refer
to
202).
-Test
for
continuity from F6-A04 (gnd)
to
N2-P08 (gnd).
Is
there
continuity
between
the
pins?
Y N
437
-Test
for
continuity from F6-A02
(gn<;1)
to
N2-P08 (gnd).
Is
there
continuity
between
the
pins?
Y N
3 3 3 3
9 9 9 9
F F F F
Q R S T
A F F F F
K 0 R S T
6 3 3 3 3
9 9 9 9
438
Pin
FS-A02 is part
of
the board
ground plane,
it
must
be ground.
Retry this map
Go
to
Page 2.
Step
007.
Entry
Point
B.
439
Repair the open connection between
FS-A02 and FS-A04 .
440
Check/replace the tape drive cable (refer
to
202).
441
Defective tape control card (refer
to
202).
442
ERROR
915--STATUS ERROR.
File protect status should be active (status
bit
6
was 0, should have been 1).
(refer
to
the appendix, the general logic probe).
-Probe F2-P04 (+file protect).
-Leave the probe on the pin.
Is
the
DOWN
light
on?
Y N
443
Defective
F2
(base
I/O)
card.
444
-If
there is a cartridge
in
the tape drive, remove it.
-Remove tape control card (refer
to
202).
Is
the
UP
light
on?
Y N
28SEP76
PN
1608386
4 4
o 0
F F
U V
EC
829670 PEe 828851
MAP
0300-39
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