IRX-V990
MP ADJUSTMENTS
• Idling Current Adjustment (FRONT)
1) No signal applied.
2) Non-loaded
condition.
3) Aging is not neccessary.
Item
Test Point
Adjusted
points
Rating (~C)
FRONT
L
R694 or R695
VR601
3.0mV-3.5mV
FRONT R
R707 or R708
VR602
'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.
Note)
• Q617 and Q626 are transistors(2SC1846S)
for tem-
perature correction. Apply silicone grease to contact
surface with the heat sink.
Item
Test Point
Rating
(~C)
Note
If the measured vOltage exceeds 6.1 mV, cut the
CENTER
R720
0.1mV-6mV
lead wires of R682 and then check again if each
measured value satisfies the rating.
Note)
• If R682 has already been cut off and idling current does not flow, reconnect R682.
• Q633 is the transistor(2SC1846S)
for temperature correction. Apply silicone grease to
contact surface with the heat sink.
R708
VR602
rl-
R720
br
~
t- - •
.
.
.
VR601
R707
r
R682
9
R694 or R695
R707 or R708
R720
FCUIOFF
'M'u
Содержание RX-V990
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Страница 61: ...1 A B I c RX V990 SCHEMATIC DIAGRAM MAIN I I I 2 3 I I I I l I MAIN L I co C 0 4 I l I 5 I I I l ...
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