Pr
el
im
in
ar
y
2) Tune the
S400
to 108.500 MHz (90.500 MHz for Japan). Looking at the
S400
from the front, measure
with a DMM at the right hand side of
R21
found at position “R6” on the board. Adjust
L13
until the
tuning voltage is 10.0V DC.
3) Tune the
S400
to 98,000 MHz (83.00 MHz for Japan). Measure with an oscilloscope, the IF-signal
10.7 MHz at the common point between
CF3
and
CF4
found at position “O4” (see Figure 1). This
point will be “DC voltage free”.
Leave the oscilloscope set to this point until told to remove it
.
In the order listed below:
•
Adjust
L10
until the IF-signal for maximum setting.
•
Adjust
L7
until the IF-signal for maximum setting.
•
Adjust
L1
until the IF-signal for maximum setting.
•
Readjust
L10
,
L7
and
L1
until there is no more improvement for the maximum settings.
IF Measurement Point
CF4
CF2
CF3
Figure 1
L1
L2
L10
L12
L7
VR1
L13
IC1
R21
Unsolder Clip
Unsolder Clip
Figure 2
NAD S400
Summary of Contents for S400
Page 1: ...NAD SERVICE MANUAL S 400 S 400 RDS FM TUNER RDS FM TUNER ...
Page 2: ......
Page 9: ...P r e l i m i n a r y NAD S400 ...
Page 10: ...P r e l i m i n a r y NAD S400 ...
Page 11: ...P r e l i m i n a r y NAD S400 ...
Page 12: ...P r e l i m i n a r y NAD S400 ...
Page 13: ...P r e l i m i n a r y NAD S400 ...
Page 14: ...P r e l i m i n a r y NAD S400 ...
Page 15: ...NAD S400 MAIN BOARD ...
Page 16: ...NAD S400 MAIN BOARD ...
Page 17: ...NAD S400 POWER BOARD ...
Page 18: ...NAD S400 POWER BOARD ...
Page 19: ...NAD S400 SUB DISPLAY BOARD ...
Page 20: ...NAD S400 SUB DISPLAY BOARD ...
Page 21: ...NAD S400 MAIN DISPLAY BOARD ...
Page 22: ...NAD S400 MAIN DISPLAY BOARD ...
Page 29: ...P r e l i m i n a r y ...