Onkyo TXDS-777 Service Information

ONKYO USA CORPORATION

200 Williams Drive • Ram sey NJ 07446
201-825-7950 Fa x 201-825-8150

Models: TXDS676, TXDS777

Classification: Mandatory
Problem:

When the set is placed close to a TV, Monitor or Projection TV that may radiate some Electro Magnetic

field; it is possible to hear Hiss and or Hum noise through the center channel that may resemble the Vertical/Horizontal
scan Frequency.

Solution 1:

Set the receiver as far as possible from sets that may produce magnetic field.

Solution 2:

Perform a minor wire location adjustment, add wire gauge #20, Fig 1; cut foil pattern (GND), Fig 2; and

add resistor, Fig 3. This PCB is found next to the DSP.

J703

Reposition wire as shown here.

J707

Ground side of R7413 , R7536, C7437

Cut foil at this point (Ground line). Be careful
not to cut thin foil pattern above it.

11/11/1999

1

Fig 1

Place a jumper PVC from
J7031 to J7117and route wire
as shown on the picture. Pass
the wire between C7435 and
C7431 and bring capacitors
close to each other until they
hold wire in place.

Fig 2

Le

ft

Add 47k ohm 1/8 watt resistor
P/N 101473530

between +side
of C7413 and left side of
C7432.

Fig 3

Right