EFJohnson 3000 SERIES Switch, Sections Open, Sections Closed, VTM PCM Bank Verification, NOTE: Make sure both power supplies are turned OFF

SYSTEM RACK

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.

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