7.
7.1
Basic Trouble-Shooting
Component Removal
The COBO 1.2Kw Pack has been designed to be serviced easily and quickly by
the customer.
The plug-in electronics are designed to be removed by first removing the Con-
trol Panel (4 screws), and then removing the suspect printed circuit board.
The Motherboard is removed as a part of the card cage. Remove the top cover,
then unplug all cards and cables from the Motherborard, making sure to note
where they go back, remove the screws holding the Card Cage to the Bottom
Housing, and remove the Card Cage.
The electrical and mechanical components, relays, chokes, breakers, connec-
tors, fan and phase changer are accessible by simply removing the top cover.
The relays are fastened from above into the heat sink by two screws and are
easily replaced by the customer by removing the two screws and disconnecting
the electical connections .
For best operation, do a routine check and cleaning about once each year un-
less the operating environment is unusually harsh or dirty. Service and main-
tenance other than this cleaning are seldom required. In case of problems , and
in order to save time and aggravation , follow the procedures outlined here
before calling Strand Lighting. Observe what happens at each step. These
steps represent the questions you will first be asked by Strand Lighting Service
Representatives.
The person actually doing the tests should contact
Strand
Lighting to minimize errors in translation and other misun-
derstandings.
In case of failures in the system, fault isolation is expedited by considering the
system subject to the following categories of possible malfunctions :
A. Major system malfunctions common either to all dimmers or to a
single phase.
B. Dimmer problems common to a single Ramp Card.
C. Dimmer problems not related by phase or Ramp Card.
Establish fault location by interchanging Ramp Cards, or SSAs as required.
Correct the problem by card or SSA replacement. Always turn dimmer rack
power OFF when removing or replacing a PCB from the Motherboard.
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