Philips PM2521 Service Manual page 179

7
10.3.
Test
O (RAM
and I/O
test)
Settings signature analyser
Setting
Edge Testpoint Signalname
start
Ti (neg)
TPM
|P17l (D
1904
pin 34)
stop d" (pos)
TPM
1P17I
(D1904pin
34)
dock
S
(pos)
TP15
ALE
(D1911
pin 11)
ground
—
TP1
Logic 0
NOTE:
1.
The testrom placed
in
the
D
1909 socket.
2.
Reference
logic
0
= 0000.
logic
1
=
HCH5
3.
Reading display:
La
-10V