Hughes PES 5000, Manual, Page: 10 / 17

CSB 229
10
ROM Version Identification
As shown in figure 9, the ROM is located at U534. The part number is 1028608-0001. On the chip this is marked as
1028 on one line, 608 on the next line and the rev. level, E, on the third line and checksum 980A on the fourth line. The –
0001 portion of the part number is not marked on the chip.
Table 4 lists the REM MEM codes for the PES 5000 version 3 ROM chip. As described in CSB 226, the Hub operator
may use the System Operator Console (SOC or VOC) and the listed REM MEM codes to determine the rev level of a
ROM at a distant site.
After improved ROMs are developed, you may be called upon to replace a ROM chip in PES 5000 version 3. If so,
perform the following steps:
STEP 1. Select a location to perform the replacement. If you have access to the PES 5000 version 3 before visiting the
customer site, it is generally recommended to replace the ROM at your facility (Field Service office or
installation subcontractor shop) rather than at the customer site, which can be quite cramped without adequate
work area.
STEP 2. Set up an anti-static mat on a firm level surface. Be sure to ground wrist strap to a known good source of
ground. NOTE: FAILURE TO USE PROPER ANTI-STATIC MEASURES, COULD SEVERELY
DAMAGE ROMs AS WELL AS CIRCUIT CARDS. Remove power from the unit. Remove the chassis
cover/front panel as described in steps 1 thru 3 on page 5 and as shown in figure 5 and 6.
STEP 3. Note the location of the ROM as shown in figure 9: For the plastic leadless chip carrier (PLCC) integrated
circuit, use an appropriate extraction tool (such as Methode stock number CT2012, which HNS supplies as
HNS P/N 9004284-0134 or McKenzie part number TOL PLCC-XT-2) to remove the ROM to be replaced.
Failure to use an appropriate extraction tool could damage the socket. Spread the tool to fit the socket slots.
Insert the tongs in the socket slots. Squeeze the tool to lift PLCC IC. Do not try to pull out PLCC. Let the
tool action lift the PLCC IC
STEP 4. Carefully install the replacement ROM in the socket observing the correct orientation of the cut corner and the
beveled edge of the IC.
STEP 5. Discard the ROM that you have removed. It cannot be reprogrammed. It is a one-time Electrically
Programmable Read Only Memory.
STEP 6. Replace the cover/front panel. Reattach cables. Restore power. Return to the standard installation
procedures. Verify proper operation of the unit.
Table 4 PES 5000 Version 3 REM MEM Codes
ROM
Part Number(s)
First
Byte Second
Byte Comment
Okemo motherboard
Segment Addr: FFFF
Offset Addr: 000A
1028608-0001E 7C 1A Initial Release
(Ku-band only, front panel switches not functional)