Compaq 4200 Family - Manual (Page 23)

2–4 Enclosure 4200 Family LVD Disk Enclosures User Guide
Applying Power
There are no disk enclosure power control switches. Connecting an AC power cord from a
power source to the power supply is all that is required. When a power supply has an AC
input, it develops and distributes DC voltages within the enclosure.
Verifying Operation
Applying power causes the elements to begin operating. Check the enclosure status LEDs
in the front, lower right corner (see Figure 2–2). If the display is not exactly as shown,
there is an element error condition. Check the drive and enclosure status LEDs on the front
and the EMU, power supplies, fans, and I/O module status LEDs on the rear (see
Figure 2–3) to determine the defective element.
Table 2–2 Installing SCSI Bus Cables
1. Stop all SCSI bus data transfers.
2. Align the D-shaped cable connector with D-shaped I/O module connector.
3. Firmly seat the cable connector on the module connector.
4. Finger tighten the thumbscrews to fully seat the connector.
5. Restart data transfers over the SCSI bus.
CXO6981A