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WQ-272H(R)
AM IF/RF
SIGNAL
400 Hz, 30%, AM modulated
GENERATOR
TEST
FRE-
STEP
STAGE
QUENCY
MW IF (Set the band selector switch to MW position.)
455 kHz
1
E:
468
kHz
LW RF (Set the band selector switch to LW position.)
2
145 kHz
Band
coverage
3
295 kHz
4
Repeat steps 2 and 3 until no further
made.
5
170
kHz
Tracking
6
270
kHz
7
Repeat steps 5 and 6 until no further
be
MW RF (Set the band selector switch to MW position
8
510 kHz
Band
coverage 1,650 kH Highest
9
Repeat steps 8 and 9 until no further
10
can be made.
600 kHz
11
Tracking
1,400 kH
12
Repeat steps I I and 12 until no further
13
can be made.
SW RF (Set the band selector switch to SW position
5.85 MHz
14
Band
coverage
18.5 MHz
15
16
Repeat
steps
14 and 15 until
made.
17
6.5
MHz
Tracking
18
16 MHz
Repeat Steps 17 and 18 until no further
19
can be made.
CIRCUIT
ADJUSTMENT
DIAL
POINTER
JUST-
REMARKS
SETTING
MENT
High
Adjust for
frequency
best
"IF"
Lowest
LIO
frequency
Adjust
for
maximal
Highest
TC8
output.
frequency
improvement
can be
170
kHz
L7
Adjust
for
maximal
270
kHz
TC5
output.
improvement
can
Lowest
1.9
frequency
Adjust
for
maximal
TC7
output.
frequency
improvement
Adjust for
600 kHz
1-7
maximal
1,400 kHz
TC4
output.
improvement
Lowest
LB
frequency
Adjust for
maximal
Highest
TC6
output.
no further
improvement
can be
Adjust for
6.5
MHz
L6
maximal
16 MHz
TC3
output.
improvement
(TUNER
Sweep
Test
Generator
Loop
curve.
Figure 12—
Test
Signal
Dummy
(see Figure 12—5)
Signal
Generator
R
L 7 (LW)
T3
TC2
IC2
T2 @
Figure 12—6
SECTION)
MW/LW
IC2
Bar Antenna
@ Pin
unit
GND
Figure 12—1
AM IF
455 kHz or 468
kHz
2 AM
IF CURVE
MWILW
Figure 12—3 LW/MW RF
Rod
Antenna
IC30 Pin
Unit
GND
GND
Figure 12—4 SW RF
To Telescopic
Rod Antenna
c
Z = 50 ohms
Z: Output impedance of signal generator
To Chassis GND
Figure 12—5 SW DUMMY
L7(MW
Tuner
P.W.B.
TC5
TC3
TCI
TC4
TC7
TC8
1-9 LIO
IC3
6
ADJUSTMENT
POINTS
Oscilloscope
Electronic
Voltmeter
Electronic
Voltmeter
o
: 1320
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