KEPCO RA 19-4B - Manual (Page 12)

2-2
RA 19-4B 011409
2. Remove the four screws (two at the top and two at the bottom) securing the rear panel to the
chassis and separate the rear panel from the chassis (it is not necessary to remove the
ground connection (if present) between the rear panel and the chassis ).
3. Remove seven screws (three at the top and four at the bottom) securing the back plate to the
chassis and remove the back plate to gain access to the interior components (see Figure 2-1)
FIGURE 2-1. BACKPLATE ASSEMBLY, INTERIOR VIEW
2.3.2 ESTABLISHING KEY POSITIONS
To establish the keying of any position, simply insert the key pin from the front and secure with
mounting nut at the back plate using two ¼" nutdrivers or deep sockets. RA 19-4B backplate
assembly keying is identical to the HSF module keying identified in Figure 2-1 and in the HSF
operator's manual. Slots 3 and 4 require two pins to key 3.3V; all other models require only one
pin. DO NOT ALTER THE KEYING AT THE POWER SUPPLY.