363-205-401
Power Up:
Issue 7, March 1997
Page 1 of 4
DLP-517
Install 3C( ) Ringing Generators in J1C182BB Bulk
Power Shelf
SUMMARY: Insert 3C( ) RINGING GENERATOR into RING GEN1 slot in power
shelf. Measure 90 to 110 V AC and
−
50 to
−
60 V DC at RSU [
−
20HZ (1), (2)/GRD].
Unseat RING GEN1, install RING GEN2 and repeat. Reseat RING GEN1 and press
and hold RG1 SHUTDOWN button on RSU. Verify that FAIL indicator on RING
GEN1 is lighted and FAIL indicator on RING GEN2 is off. Release RG1 SHUTDOWN
button and press and hold RG2 SHUTDOWN button on RSU. Verify that FAIL
indicator on RING GEN1 is off and FAIL indicator on RING GEN2 is lighted.
1.
Get two 3C( ) RINGING GENERATORs and inspect for possible physical
damage.
2.
Insert one 3C( ) RINGING GENERATOR into RING GEN1 slot in power shelf.
3.
Condition digital multimeter (DMM) to measure AC volts.
4.
On RSU, connect DMM test leads to
−
20HZ (1) jack and GRD jack.
Response:
DMM indicates between 90 and 110 volts.
5.
Condition DMM to measure DC volts.
Response:
DMM indicates between
−
50 and
−
60 volts.
6.
Repeat Steps 3 through 5 with the DMM test leads connected to
−
20HZ (2)
jack and GRD jack on RSU.
7.
Is AC/DC ringing present at both
−
20HZ jacks on the RSU?
If YES, then proceed to Step 24.
If NO, then continue with Step 8.
8.
Is AC/DC ringing present at one
−
20HZ jack on the RSU?
If YES, then continue with Step 9.
If NO, then proceed to Step 12.
9.
Replace RSU and repeat Steps 3 through 6.
