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SDG2000X Service Manual.doc
71
-20 V
VH-(white)
±30%
6.5 V
VL+(yellow)
±30%
-6.5 V
VL-(blue)
±30%
If each tested voltage value is within the specified range listed in the table
above, then some abnormality of the load is most likely causing the power
supply problem. Continuous checking or even replacing the channel/main
board is required for further test.
If there is at least one voltage value that is out of the specified range, then the
power supply module appears to be problematic, and a replacement will be
required. For safety, please have qualified technical personnel to disassemble
the power supply module.
Note: The main power supply provides an input fuse to protect against the
danger of fire in the event of a failure of the power supply circuitry. However,
this fuse will not fail ("open" or "blow") in normal power supply operation except
when a significant overload occurs. Replace the entire main power supply
assembly if the input fuse fails.
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