Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Technical References

 

 

Reverse Segmentable GainMaker 
Node OIB Shorting Condition 
Technical Bulletin 

Reverse Segmentable GainMaker® Nodes that were manufactured and shipped 

prior to August 2007 have the potential for a shorting condition between the 

optical interface board (OIB) and a ground boss inside the node housing. If the 

soldermask on the back of the OIB is compromised, a 24 VDC power trace on the 

board may come into contact with the boss, creating a short to ground. 
Our experience has shown that while some nodes having this condition may work 

indefinitely in the field, others may fail soon after installation. Therefore, we 

recommend that all nodes having this condition be reworked to add insulation 

between the OIB and the boss.  
Important! This phenomenon has occurred in Reverse Segmentable GainMaker 

Nodes shipped prior to August 2007, and has been corrected in subsequent 

shipments of these products. This phenomenon should not occur in the standard 

GainMaker Nodes, as the OIBs in these nodes are of a different design. 

This technical bulletin explains to customers using the Reverse Segmentable 

GainMaker Node how to identify units possibly affected by this condition, and 

how to initiate rework of the affected nodes. 

This document is intended for authorized service personnel who have experience 

working with similar equipment. The service personnel should have the 

background and knowledge required to understand and verify the information 

provided in this document. 

Only appropriately qualified and skilled service personnel should attempt to 

install, operate, maintain, and service this product.