EFJohnson 3000 SERIES - Manual (Page 31)

SYSTEM RACK
4-5
7. The modules display an "A" if the PCM bank is
good. Press S2 to reset the module if "A" is not
displayed.
•
A failure on the primary displays a "1" on one or
both modules.
•
A failure on the secondary displays a "2" on one
or both modules.
8. After the PCM bank has proven good, force failures
on both the primary and secondary as follows:
Primary
•
Remove cables on Shelf 1, J5 and J6.
•
A "1" on both modules indicates a Primary
failure.
•
Reconnect the cables.
Secondary
•
Remove cables on Shelf 1, J23 and J24.
•
A "2" on both modules indicates a Secondary
failure.
•
Reconnect the cables.
•
Remove the cable from Shelf 1, J3 to J4.
9. Remove CIMs from rack and patch cords from
J1-J2.
VTM PCM Bank Verification
This requires the use of one CIM and one VTM1.
1. Verify the VTM1 card is in Shelf 1-slot 2.
2. On the VTM1 connect a Transmission Test Set to
TP1 and TP2 (common).
3. On the VTM1 set S2 to select the 1020 Hz align-
ment tone. The tone should be heard in the Test Set
speaker. Adjust the monitor volume as necessary.
4. Set the CIM for System Test "1".
(S5, section 1 open; sections 2,3,4 closed.)
5. Place the module in any slot on Shelf 1.
6. Connect a Transmission Test Set with the common
lead in CIM connector J13.
•
Verify -3 dBm
±
0.5 dB at TP3
(adjust R83 if necessary).
•
Verify -12 dBm
±
0.5 dB at J12
(adjust R44 if necessary).
7. Move the module to a slot on Shelf 2.
•
Verify -3 dBm
±
0.5 dB at TP3.
•
Verify -12 dBm
±
0.5 dB at J12
8. Set the CIM to System Test "0".
(S5 all sections closed.)
9. Remove the CIM from the rack.
4.1.10 FINAL CONFIGURATION VERIFICATION
NOTE: Make sure both power supplies are turned
OFF.
1. Disconnect AC Power Cables from AC power
source.
2. All PTMs should be installed and configured as
follows:
Switch
Sections Closed Sections Open
S5, S7 1 - 8
S6, S8 8 1,2,3,4,5,6,7
3. Select one of the Backplane boards for measuring.
Measurements can be made on any of the
64-pin connectors on the Backplane selected.
4. All measurements should be referenced to ground
(pins 9, 10, 41 or 42) unless otherwise noted.
5. All test readings should be within 5% of the
following specifications:
Pins Ohms
16/48 37.5
17/49 37.5
18/50 37.5
19/51 75.0
20/52 37.5
21/53 37.5
22/54 100 (measured to +5V DC*)
23/55 37.5
24/56 100 (measured to +5V DC*)
* Pins 11, 12, 43 or 44.