User manual

Power LED blinks 7 Times
Yes
Is the red LED
(D6583) on the
SC board lit?
No
Does the
voltage at pin 11
of SC20 go low?
Yes
No
Replace the “D” Board
Replace the SC board.
Note: Both, the SU and the SD boards
may load down the SC board. Isolate
them before replacing the SC board.
Check voltage at pin11 of SC20 using
a peak-hold meter.
SC boardSC board
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