Philips PM2521 Service Manual page 187

10.9. Test
6
(Interrupt controller
test).
Settings signature analyser
15
Setting
Edge
Testpoint
Signalname
start
stop
clock
qualifier
qualifier
ground
(neg)
(pos)
J- (pos)
li
(neg)
if (pos)
TPM
TPM
TP15
D1903
pin
D1903
pin
TP1
fP17]
[ml
ALE
7
azc/p1
2
AZ
logic
0
NOTE:
1.
Testrom placed
in
D
1909 socket (Both
ROMs
removed)
2.
Short
circuit
TP
10
and TP
11
3.
Reading
on
display:
LB
4.
Adjust with
R502
the signature
on
0191
1
point 2
to
0000
5.
Set the
PM2521
in
the
function
V
.-r-r-
6.
Reference
logic
0
=
0000
logic
1
-
A4A7
D1904
^P803S
ST
3478
820309