Replace first group of fuses and continue removing groups
1. Removal of fuses
may cause F-level
2. All clock chains
must be powered up
BAY 0
GROUP 1
GROUP 2
GROUP 3
GROUP 4
BAY 1
[3] Is voltage
[5] Replace
fuses removed
[6] Have all four
groups of fuses
been removed
Yes
No
No
Yes
and should remain
in service during
of fuses, using procedure used in checking first group
[4] Note fuses
that failed
voltage test
[2] Measure
voltage output
NOTES
of this procedure
output voltage of each fuse socket. Note name of any
A1
A2
A3
A4
A5
A6
A7
A8
A9
B1
B2
B3
B4
B5
B6
B7
B8
A1
A2
A3
A4
A5
A6
A7
A8
A9
B1
B2
B3
B4
B5
B6
B7
B8
noted in Step 4
CHECK FOR SHORTED DIODES IN FB211 CIRCUIT PACK
[1] See NOTES 1 and 2.
Remove all BAY 0,
REMOVAL SEQUENCE
[8] Are any fuses
[7] Remove next
group of fuses
listed in TABLE A
and repeat from
Step 2
[9] Clear
shorted power
ORing diode
Remove first group of fuses listed in TABLE A and measure
fuses with voltage equal to or greater than 0.5 volts.
of fuses
in TABLE A
of each fuse
socket
than 0.5 volt
interrupts from
TSI, TMS, or SCLK
controllers if
performance
TABLE A
NCLK FB211 PACK FUSES
equal to or greater
at any fuse socket
open diode exists
in
FB211
pack
group of
SUMMARY
GROUP 1, fuses listed
Yes
No
DLP
PAGE 1 of 1
234-151-013
535
Issue 8
DEC 1995
