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RC-550L/LB
Tuner Alignment
Output Measuring:
Speaker terminal (Impedance = 622), output level 50mW (0.55V/6Q)
AM IF & RF Alignment
Input (SSG)
Modulation 400Hz, Modulated to 30%
Frequency
Place to be aligned
Set the V. Capacitor to
Band
Frequency
rie
455kHz
Loop Antenna
L13,14,17
Minimum
Repeat the Step 1, and adjust for no further improvement.
520kHz
LQ
Maximum
Loop Antenna
1650kHz
C52
Minimum
L5
7
Repeat the Steps 3 & 4.
MW
600kHz
[eB
el]
600kHz Signal
Loop Antenna
1400kHz
Cc
1400kHz Signal
Repeat the Steps 6 & 7, and adjust for no further improvement.
145kHz
L10
Maximum
Loop Antenna
360kHz
C53
Minimum
_ =
—
| —
NI]
oO ~
on;
PB]
win
Repeat the Steps 9 & 10.
LW
160kHz
160kHz Signal
Loop Antenna
350kHz
350kHz Signal
Repeat the Steps 12 & 13, and adjust for no further improvement.
= wo
Rod Antenna
L11
Maximum
through
6.3MHz
Dummy Antenna
C54
Minimum
Repeat the Steps 15 & 16,
5.9MHz
Rod Antenna
L7
5.9MHz Signal
through
6.3MHz
Dummy Antenna
C38
6.3MHz Signal
20
Repeat the Steps 18 & 19, and adjust for no further improvement.
21
5.8MHz
Rod Antenna
L12
Maximum
through
22
18.6MHz
Dummy Antenna
C55
Minimum
No wo
Repeat the Steps 21 & 22.
Sw2
24
6.0MHz
Rod Antenna
L8
6.0MHz Signal
through
25
18.0MHz
Dummy Antenna
C39
18.0MHz Signal
Repeat the Steps 24 & 25, and adjust for no further improvement.
NO oO
Note:
Set the fine tuning knob to the centre position when aligning.
Output (Oscilloscope)
:
OIF
TP5 (hot) & TP8
Discriminator
TP4 (hot) & TP8
Place to be aligned
Wave form
L3
Peak
-W1-—
No. 1384
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