363-205-401
Power Up: DLP-530
Issue 7, March 1997
Page 3 of 6
9.
Inspect and/or replace the following in the order listed until the A/FCU MJ indi-
cator goes out:
• WHITE and BLUE fuses in BFU1
• Each PCU
• Optics power shelf wiring using SD-7C150-01.
10. Condition DMM to measure volts DC.
11. At one of the PCUs just installed, connect DMM test leads to GND jack and
−
48 jack.
12. Does DMM indicate between
−
42 and
−
56 volts?
If YES, then proceed to Step 21.
If NO, then continue with Step 13.
13. Are any fuses on BFU1 or BFU2 blown?
If YES, then continue with Step 14.
If NO, then proceed to Step 15.
14. Replace blown fuse(s) in BFU and repeat procedure from Step 11.
15. At TB1 on RT optics power shelf (Figure 1), use DMM to measure voltage
between
−
48V1 and
−
48RTN1 and between
−
48V2 and
−
48RTN2.
