Yorkville Sound
Yorkville Sound
Yorkville Sound
Yorkville Sound
Phone: (905)837-8550 Ext.218
550 Granite Court
Fax: (905)839-5776
Pickering, Ontario
Email: [email protected]
Canada L1W 3Y8
www.yorkville.com
SERVICE BULLETIN
Date
Date
Date
Date :::: March 6, 2000
Re
Re
Re
Re
::::
AP812/AP818 GROUND HUM UPDATE
Dear Staff & Dealers,
Due to some feedback from our customers a service issue regarding hum problems have
been discovered with the
AP812
and
AP818
mixer/s. Please be advised that units in
production after March 2000 will
NOT
have this problem.
The
HUM
problem only occurs when the main in/out jacks are used (i.e. if a processor is
used). There is considerable hum at the MONITOR OUT jack as well.
To solve these problems follow the directions listed below...
Required Modification:
--------------------------------
1.
Seperate Top & Bottom
2.
Find where the
Orange
&
Green
Wires are soldered to eyelets, pretty well in the center of
the board (marked with an
Orange
&
Green X
on the layout provided).
CUT
the
Orange
&
Green
Wires as close to the
EYELETS
as possible (on the filter capacitor
side). (as shown circled in
RED
3.
Solder both wires (that you've just cut) to TAB 3 (as shown circled in
GREEN)
4.
Don't forget to re-connect the
Green
Wire (female spade) to the Top Mixer (male spade lug)
We are sorry for any inconvenience caused as a result of this problem. For further technical
information or assistance please contact
Peter Mourtos
at
Yorkville Sound
via phone at
(905) 837-8550 Ext. 218 or via email at
.
Enclosed
- the Layout for the
AP812/818
M1104 Power Amplifier board with instructions.
