Service Guide SP-HF1255A
7
Attention
1.2.1 No power, LED (indicator) unlighted
Problem
Analyze
and
identify
the
causes
Solutions
Please follow the numbered sequence marked within parenthesis given in individual
Flow chat in that this is the best-recommended sequence to rectify the problems.
Defective transformer
Defective or damaged AC
cable or power switch
Or caused by the following:
1. Transformer secondary wire loosely
connected with 1CN1 jack in
SP-HF1255A AMPA.
2. Copper foil of SP-HF1255A AMP
PCBA broken
Repair or replace Re-solder or replace
No power，LED （indicator）unlighted
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