Infinity Overture 3 Compositions Series, Service Manual, Page: 19 / 36

IMPORTANT NOTE ON OVTR 2/3 AMPLIFIER REVISION
There was an early version of the Overture 2 and 3 Amplifier that is represented slightly inaccurately in the schematic, PCB drawings, and parts list
in this service manual. This page is a guide to the identification and differences to this earlier version.
The drawing below is a later version of the
PCB
, complete with this information.
NLA = No Longer Available
ORIGINAL VERSION = R80 IS NOT IN
SILKSCREENED AREA, BUT INSTEAD ON
OPPOSITE SIDE OF PCB, CONNECTED
FROM MAIN “+” ON C15, TO COLLECTOR
(CENTER LEAD) ON Q12 (BF469).
Q11 ORIGINAL VERSION = MPSU06
Q11 LATER VERSION = 2SD2012
(DO NOT SUBSTITUTE - PIN LAYOUT
DIFFERENT !)
MPSU06 part# NLA
ORIGINAL VERSION = TWO RELAYS
LATER VERSION = ONE RELAY
Do not mistake T1 for a relay.
(Later version has speaker output terminals in footprint of former relay)
There was also a version with two relays that had the output terminals on
the indicted relay bypassed with buss wire, rendering it inoperative.
ORIGINAL RELAY part# NLA
R43,43b ORIGINAL VERSION = 13K Ω 1/2W
R43,43b LATER VERSION = 33K Ω 1/2W
13K Ω 1/2W part# NLA
Overture 3
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