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IRX-V990
MP ADJUSTMENTS
• Idling Current Adjustment (FRONT)
1) No signal applied.
2) Non-loaded
condition.
3) Aging is not neccessary.
Item
Test Point
R694 or R695
FRONT
L
R707 or R708
FRONT R
'Confirm
that the idling current (FRONT) is 6mV-12mV
after 60 minutes.
8 Confirmation of Idling Current (CENTER)
1) No signal applied.
2) Non-loaded
condition.
3) Aging is not neccessary.
Test Point
Item
R720
CENTER
Note)
• If R682 has already been cut off and idling current does not flow, reconnect R682 .
• Q633 is the transistor(2SC1846S)
contact surface with the heat sink.
rl-
br
R682
9
Adjusted
points
Rating (~C)
VR601
3.0mV-3.5mV
VR602
Rating
(~C)
If the measured vOltage exceeds 6.1 mV, cut the
0.1mV-6mV
lead wires of R682 and then check again if each
measured value satisfies the rating.
for temperature correction. Apply silicone grease to
R708
VR602
R720
~
.
.
.
t- - •
r
VR601
R707
Note)
• Q617 and Q626 are transistors(2SC1846S)
perature correction. Apply silicone grease to contact
surface with the heat sink.
Note
for tem-
R694 or R695
R707 or R708
R720
FCUIOFF
' M ' u
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