Watkins-Johnson Company WJ-8711A, Инструкция по установке, эксплуатации и обслуживанию

Страница: 180 / 261

MAINTENANCE WJ-8711A DIGITAL HF RECEIVER
7-22
4 4
4
4
5
4
4
4
4
6
87IL73
Figure 7-14. Front Panel PC Assembly (A1A1) Remove and Replace Procedures (Part 2)
7.7.7
DIGITAL CONTROL PC ASSEMBLY (A2) REMOVAL PROCEDURES
WARNING
This unit contains a RAM Integrated Circuit (A2U5) that includes an on-
board lithium source used as back up power for memory retention. Extreme
care should be used in storage, handling, and disposal of parts having lithium
content. Improper handling may present explosion hazard. If the Digital
Assembly is to be disposed, remove the RAM IC. If replacement of the IC is
required, carefully insert a blunt, nonmetallic, tool between the bottom face
of the IC and the related socket. Pry the IC up at a slight angle and remove
with fingers.
•
Wear eye protection when handling component with lithium content.
•
Do not puncture, compact, incinerate, short circuit, or expose the
lithium energy source to temperatures above 176
°
F (80
°
C).
•
Do not store ICs with lithium content loose in bins. Store in original
containers.
•
Dispose of ICs with lithium content properly. Discharged cells should
be handled with care, as they retain significant energy. They should
be electrically isolated and packaged for disposal. Dispose in
accordance with local regulations for hazardous material disposal. DO
NOT INCINERATE OR COMPACT.
•
Refer to
Figure 7-23
for location of RAM IC (A2U5) on the Digital
Assembly (A2).
Courtesy of http://BlackRadios.terryo.org