86
J4, MCBL095A, Internal RAID LCD
Pin
Signal Pin Signal Pin Signal
1 Ground 8 Data 1 15 No Connect
2 No Connect 9 Data 2 16 Menu
3 Ground 10 Data 3 17 Escape
4 DISPRS 11 Data 4 18 Down
5 DISPRW 12 Data 5 19 Enter
6 DISPENB 13 Data 6 20 Up
7 Data 0 14 Data 7
JP5, MCBL087A, Internal RAID section drives power
Pin
Signal Wire Color
1 +12V Yellow
2 Ground Black
3 Ground Black
4 VCC Red
Bus Display Jumper
The two backplane boards of MESAN20 contain a jumper header JP2. Note the difference between
InterServe 650, 660 and StudioZ RAX: For StudioZ RAX, the JP2 header on the top/left backplane
contains a jumper on pins 3 and 4. This ensures the system displays the appropriate dual-bus
information when the system boots. The InterServe systems do not contain a jumper on pins 3 and 4.
Service Notice
Early releases of the system included a cable (MCBL107A) that connected J12 on the power
distribution board to J3 on the RAID sensor board. If the power distribution board in the system has
J12 populated, then incorrectly attaching the cable could cause damage to the power distribution board
or the RAID sensor card. When replacing the internal RAID section assembly or power distribution
board, remove the cable MCBL107A from the system. This cable is not required for proper system
operation.
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