HP 5890 SERIES II Service Manual page 314

EPC PCB CONNECTORS
J1.1 BD0
J1.2 BD1
J1.3 BD2
J1.4 BD3
J1.5 BD4
J1.6 BD5
J1.7 BD6
J1.8 BD7
J1.9 *EXT_OUT3 - - - - - - - - - - - - - - - - - - | Decode to give
J1.10 A(5)
J1.11 A(6)
J1.12 *EXT_IN3 - - - - - - - - - - - - - - - - - - - |
J1.13 +5V
J1.14 +5V
J1.15 DGND ( for digital circuits)
J1.16 DGND ( for digital circuits)
J1.17 D240 ( 240 Hz square wave)
J1.18 POP ( power- on- pulse)
J1.19 SGND ( for switching or analog circuits)
J1.20 SGND ( for switching or analog circuits)
J1.21 +24V
J1.22 +24V
J1.23 - 24V
J1.24 - 24V
P1.1 ALARM RELAY ( common for 2 & 4)
P1.2 ALARM RELAY ( connects with 1 & 3 on alarm)
P1.3 ALARM RELAY ( common for 2 & 4)
P1.4 ALARM RELAY ( disconects from 1 & 3 on alarm)
P1.5 +24VDC
P1.6 CHANNEL A BPR ENABLE VALVE
P1.7 +24VDC
P1.8 CHANNEL B BPR ENABLE VALVE
P1.9 +15VDC
P1.10 ALARM BUZZER DRIVE
P1.11 +5VDC
P1.12 GND
P2.1 P_SENSA(A pressure sensing)
P2.2 +15VDC
P2.3 +5VDC
P2.4 ACOM
P2.5 P_CNTLA
P2.6 - 15VDC
P2.7 SHEILD
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APPX A- 15