Comtech EF Data CDM-625 -5V User manual

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
CDM-625 -5V Rework and Assembly Instructions
These rework/assembly instructions are intended for PL/12587 chassis assemblies -1, -2 and -3. The rework and
assembly required will include the Base Card (PL/11963-1 through -4), the CnC Card (PL/12875-1) and a new
Adapter Card (PL-002094x) along with the power harness that matches each “-“ assembly power supply.
Tools Required
1Small Flashlight
1#1 Philips Screwdriver
1Needle Nose Pliers
Part Kits
Standard AC Chassis (PL/12587
-
1)
–
Artesyn P.S
.
Qty 1, LB-0020518, Label C-0023329, placed on front panel to indicate upgrade completed.
Qty 2, LB/9107, Label Warranty Seals.
Qty 1, CN/HED02MSR01, 2 pin single row right angle connector. Solder on CnC board.
Qty 1, PL-0020942, -5V adapter board and cable for Artesyn P.S.
DC Chassis (PL/12587-2) – N2 Power P.S.
Qty 1, LB-0020518, Label C-0023329, placed on front panel to indicate upgrade completed.
Qty 2, LB/9107, Label Warranty Seals.
Qty 1, CN/HED02MSR01, 2 pin single row right angle connector. Solder on CnC board.
Qty 1, PL-0020943, -5V adapter board and cable for DC N2 Power P.S.
AC Chassis Packet Processor Option (PL/12587-3) – Lambda P.S.
Qty 1, LB-0020518, Label C-0023329, placed on front panel to indicate upgrade completed.
Qty 2, LB/9107, Label Warranty Seals.
Qty 1, CN/HED02MSR01, 2 pin single row right angle connector. Solder on CnC board.
Qty 1, PL-0020944, -5V adapter board and cable for Lambda P.S.
Tool Kit
1
KT
-
0020583
(Includes Cutters, RTV Silicone Sealant)

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
1. First turn OFF power and unplug the power cord. Remove the top cover by unscrewing (20) machine
screws with a #1 Philips screwdriver and locate the areas of interest. Save these screws for re-
assembling the unit.
Verify the CnC module is installed, if not STOP! This rework only applies to units with CnC.
2. Unplug power harness from J26 and remove (2) screws. One near C813 (Top Card) and one near J26
(Bottom Card).

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
3. Correctly identify U94 before cutting. This can be tricky! Cut the output pin of U94 (Bottom Card) and
ensure connection between output pin and PCB pad is open. A flashlight might be useful to locate U94.
Note: U94 may or may not have heat sink installed.
4. Re-connect the power harness to J26, power on unit and verify a -5V fault. ~If a -5V fault is not present,
then the cut on the output pin of U94 was not performed correctly. Go back to step 3 and ensure the pin
has been properly cut.
CUT
Picture shown without top card for clarity

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
5. Power down the unit, remove the power harness and apply RTV to U94 between the output pin and PCB
pad to ensure electrical isolation.
6. Remove the (2) screws holding the CnC module. Solder 2pin right angle header connector
(CN/HED02MSR01) on CnC board (PL/12875-1) J1 pins 35-36 & 37-38 as shown below. Re-install
CnC board and two mounting screws.
RTV
OLD CnC
No connector
NEW CnC
with connector

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
7. Install the new adapter board harness and the (2) screws near C813 (Top Card) and J26 (Bottom Card).
Ensure the slot in the new adapter board is placed around J20 header.
8. Connect -5V harness to CnC card 2-pin header.
9. Power on unit and verify there is no -5V fault.
J20

WARNING - This document contains U.S.-origin data, the re-transfer of which is restricted by the Export
Administration Act and Export Administration Regulations (15 C.F.R. 770, et seq.) D-0020532 REV-D
10. Replace the cover and re-install the (20) screws from step 1.
11. Place a CO# (C-0023329) label (LB-0020518) on the chassis to later identify the change has been made.
Place new warranty labels (LB/9107) on the cover (this is not shown).