363-205-401 Power Up:
Issue 7, March 1997 Page 1 of 4
DLP-520
Install Ring Control Unit (RCU) in J1C182BD Power
Shelf
SUMMARY:
Install
RCU
into power shelf. Verify no fuses blown and no indicators
lighted on
RCU
. Measure voltage at −
48V
and
GND
. Requirement: −43 to −56 V DC.
Measure voltage at
+20HZA
and
GND
. Requirement: 50 to 60 V DC and 90 to 110 V
AC. Measure voltage at
+20HZB
and
GND
. Requirement: 50 to 60 V DC and 90 to
110 V AC.
1. Get one
AUG3 RCU
[Figure 1] and inspect for possible physical damage.
Figure 1 – Ring Control Unit (AUG3) Faceplate
AUG3
RMJ
RMN
1
2
3
4
+20HZ
0.5A 0.5A
+20HZA
+20HZB
GND
RCU
-20HZ
-48V
Lucent
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