363-205-401
Power Up:
Issue 7, March 1997
Page 1 of 2
DLP-521
Install 3H1 Ringing Generators in J1C182BD Power
Shelf
SUMMARY: Insert 3H1 RINGING GENERATOR into RING GEN1 slot in power
shelf. Measure 90 to 110 V AC and
−
50 to
−
60 V DC at [
−
20HZ (1), GRD]. Unseat
RING GEN1, install RING GEN2 and repeat. Reseat RING GEN1. Verify no -20HZ
RCU fuses blow.
1.
Get two 3H1 RINGING GENERATORs and inspect for possible physical dam-
age.
2.
Insert one 3H1 RINGING GENERATOR into RING GEN1 slot in power shelf.
3.
Is FAIL indicator on RING GEN1 lighted?
If YES, then continue with Step 4.
If NO, then proceed to Step 5.
4.
Replace RING GEN1 and repeat the procedure from Step 3. If replacement
FAIL indicator lights, proceed to Step 9.
5.
Condition DMM to measure AC volts.
6.
On RING GEN1, connect DMM test leads to
−
20HZ jack and GND jack.
Response:
DMM indicates between 90 and 110 volts.
7.
Condition DMM to measure DC volts.
Response:
DMM indicates between
−
50 and
−
60 volts.
