Service manual

PN 4237242C
2.2-5
INSTRUMENT DESCRIPTION
POWER SUPPLY
2
Figure 2.2-3 AC Power/Vacuum Relay Card
Inputs
r J1 - AC IN
r J3 - +12 Vdc from AT power supply (PWR ON)
r J4 - +24 V, VAC ON signal
Outputs
r J2 - AC OUT TO +24 V
r J5 - ac out to vacuum pump (VACUUM)
r J7 - ac out to power transformer, T1
Test Points
TP1, TP2 - ac in
Jumpers
J6 is a selection jumper connector that selects between the four possible line input ranges
(Table 2.2-2).
AC POWER/VACUUM
TP1
(Ac in)
TP2
(Ac in)
J6
(Line input range
selection connector)
J7
(Ac out to
power trans-
former, T1)
J5
(Ac out to
vacuum pump)
J4
(+24 V in,
VAC ON
signal)
J3
(+12 Vdc in
from AT
power supply)
J2
(AC OUT to
+24 V
power supply)
J1
(AC IN)
7242003A
ON-CARD
FUSE
C