System information

System Overview
VAX 4000 Model 108 User Information
1-11
Table 1-4 System Board Components
Figure
Legend
Components
1 CPU Fan Connector (J25)
2 MEM1 Carrier Connector (J4)
3 MEM2 Carrier Connector (J1)
4 Diagnostic Display LEDs (D26, D29); indicate system and test statuses for
Digital services engineers using the on-line Service Guide.
5 Diagnostic Display LEDs (D31); see 4, above
6 Break/Enable Switch and LED;
7 Thick/ThinWire Ethernet Jumper (J27) ThinWire Default
8 ThinWire Ethernet Connection (J24)
9 ThickWire Ethernet Connection (J21)
10 Modem Connector (J11)
11 Console Port MMJ (J9)
12 Console Port MMJ (J8)
13 Console Port MMJ (J2)
14 NVAX CPU (E36)
15 19.2/38.4 K baud Jumper (W13) 19.2k baud default
16 19.8 K baud Jumper (J26) Default Installed
Break/Enable Switch Positions:
a) When the switch is in the up position, the LED is on, and you can halt the system by
pressing the break key on the console terminal keyboard.
b) When the switch is in the down position, the LED is off, and you can not halt the
system by pressing the break key on the console terminal keyboard.