Denon DN-X1600 Service Manual page 22

FLOW CHART NO.6 (8U-110068:POWER UNIT)
-15VA is not outputted.
Is the fuse normal?
Is the voltage of -15V or less supplied to IN terminal
of IC906?
Check IC906 and the periphery circuit, and replace
it if defective.
FLOW CHART NO.7 (8U-310012:MAIN UNIT, 8U-110068:POWER UNIT)
The VFD display does not light up.
Is +5V voltage supplied to 1pin of CX071 on
POWER UNIT?
Is +3.3V voltage supplied to 3pin of CX071 on
POWER UNIT?
Ia signal outputted from FL_CLK,FL_DATA,FL_
CS,FL_RST terminals of IC104 on MAIN UNIT?
Replace the VFD display.
O.K.
O.K.
O.K.
O.K.
O.K.
O.K.
O.K.
N.G.
See FLOW CHART NO.2 <The fuse blows out.>
N.G.
Check D925 and replace it if defective.
N.G.
Check the +5V line and service it if defective.
N.G.
Check the +3.3V line and service it if defective.
N.G.
Replace IC104.
22