Philips SCOPEMETER PM93 Service Manual page 142

CORRECTIVE MAINTENANCE
7 - 13
Comp Name (pin) Scope Freq.
Data
Description
Circ IIC
Per. H/UA
t __
+4V
19 IACH2 0 H I Analog channel 2
- - - - - - - - - - -
- - - - 0
l _____
+4V
20 IACH6 0 H I Analog channel 6
- - - - - - - - - - - - - - -
- - - - --0
21 IACH7
0 A I Analog channel 7
22
NSS 0
L
Noltage supply
ground (0)
23 IACH5
0
L I Analog channel 5
24 HLDOFN/ACH4
__ l ____ J
_____ L _____ L_
H I A Hold off not I Analog
channel 4
25 IANGND 0 L IAnalog ground (AID
convertor)
+5V
26 NREF 0 H Nreference (AID convertor)
- - - - - - - - - - - - - - - - - - - -
- - - - --0
27
NSS 0
L IClock Detect Enable
28
ACQRDY IEXTINT
_J1IlJULfJIL _____
",,50 Hz
A Acquisition ready/External
interrupt
l ______
+5V
29
NCC 0
H
IMain supply (+5V)
- - - - - - - - - - - - - - - - - - - --0
l __________
+5V
30 /lPRESET/RESET 0 H /lP reset Ireset
- - - - - - - - - - - -
- - --0
t _____
+5V
31 IRXD 0 H IReceive data/port 2
- - - - - - - - - - - - - - - - - - - --0
t ______
+5V
32 /TXD
0
H /Transmit data/port 2
- - - - - - - - - - - - - - - - -
- --0
33 NSS 0 L Noltage supply
ground (0)
34 COAT IP1.0
_rrnnIlI ____
",,20/ls A Cbus DATA IPort 1.0;
repeated each 30-60 ms
35 DTAEb/P1.1
I I I
30-60 ms L DATA enable IPort 1.1
36
FRONTCLOCKlP1.2
_lJlIl[lJJJ __
60 kHz A
Front clock IPort 1 .2;
repeated each 30-60 ms
37 CCLK IP1.3
llilllilillL _______
100 kHz A
Cbus clock IPort 1.3;
repeated each 30-60 ms
38
PSO IP1.4
_ JllilllIlllliIl __
40 Hz A page select 0 IPort 1.4
l
+5V
39
FRONTDATA1/HS1.0
0
H
Frontdata 1 IHigh speed input
- - - - - - - - - - - - - - - - - - - - - -
- --0
1.0