47
BMC II BISYNC Quick Reference Guide
PCA Switch and Strap Settings
Note 1: Pin 1 is designated on these PCAs by a white dot. These tables
list the factory default settings for the PCA.
Table 4
NT6M62xx CPU PCA
Switch # Position
S2 1 OFF
2 OFF
3 ON
4 OFF
Jumpers Pin
J3 1-2
Table 5
CPU LED display codes
LED Alarm level Notes
BLANK N/A Power failure
U. N/A Busak faulty
P. N/A Wait faulty
H. N/A Processor failed - halt
r. N/A Processor reset - initial start-up
L. N/A Clock faulty (also indicated by lack of
decimal point)
E. N/A Invalid CPU response (also displayed
whenever switch 3 on SW2 is in the OFF
position
d. Critical Level 3 CPU Failure
c. Critical Level 2 Spare
b. Critical Level 1 TEC/DSI DMA Failure
A. Critical Level 0 Disk Failure
9. Major Level 3 Communication Loop Test
8. Major Level 2 Alarm only, no processor switch
7. Major Level 1 Communication In
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