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Einstellvorschriften / Adjustment Procedures
3. Tuner
Measuring instruments: Signal Generator, Sweep Generator, Oscilloscope, Frequncy Counter.
Function switch: Radio
Alignment scheme see page 2 - 3.
Adjustment
1. AM IF
Couple in a sweep signal of 468kHz via a 10nF capacitor
to testpoint
Oscilloscope to testpoint
Band switch: MW
2. MW Oscillator
Var. capacitor to limit stop: MW f
Couple in a standard signal to ferrite aerial via a loop
aerial
Oscilloscope to testpoint
Band switch: MW
3. MW Aerial
MW 600kHz, MW 1400kHz
bandpass
Couple in a standard signal to ferrite aerial via a loop
aerial
Oscilloscope to testpoint
Band switch: MW
4. LW Oscillator
Var. capacitor to limit stop: LW f
Couple in a standard signal to ferrite aerial via a loop
aerial
Oscilloscope to testpoint
Band switch: LW
5. LW Aerial
LW 160kHz, LW 275kHz
bandpass
Couple in a standard signal at to ferrite aerial via a loop
aerial
Oscilloscope to testpoint
Band switch: LW
6. FM Oscillator
Var. capacitor to limit stop: FM f
Couple in a standard signal via a 10nF capacitor to (FM
ant.) testpoint
possible).
Oscilloscope to testpoint
Band switch: FM
7. FM Aerial
FM 90MHz, FM 106MHz
bandpass
Couple in a standard signal via a 10nF capacitor to (FM
ant.) testpoint
possible).
Oscilloscope to testpoint
Band switch: FM
8. FM MPX (Stereo)
Couple in a standard signal of 98MHz, unmodulated via
a 10nF capacitor to (FM ant.) testpoint
Frequency counter to testpoint
Band switch: FM
2 - 5
Preparations
.
A
.
1
526.5kHz, f
u
, (f
= 1kHz, m = 30%, U
as low as possible).
B
a
mod
.
1
, (f
= 1kHz, m = 30%, U
as low as possible).
B
a
mod
.
1
148.5kHz, f
u
, (f
= 1kHz, m = 30%, U
as low as possible).
B
a
mod
.
1
, (f
= 1kHz, m = 30%, Ua <).
B
mod
.
1
87.5MHz, f
u
= 1kHz, ∆f = 22.5kHz, U
, (f
C
mod
.
1
= 1kHz, ∆f = 22.5kHz, U
, (f
C
mod
.
1
.
D
Adjust T101 and T102 to maximum.
Repeat this adjustment.
1606.5kHz
At f
(526.5kHz) adjust to maximum with T104.
o
u
At f
(1606.5kHz) adjust to maximum with TC4.
o
Repeat this adjustment.
At 600kHz adjust to maximum with L101 (MW antenna coil
move).
At 1400kHz adjust to maximum with TC3.
Repeat this adjustment.
283.5kHz
At f
(148.5kHz) adjust to maximum with T103.
o
u
At f
(283.5kHz) adjust to maximum with TC102.
o
Repeat this adjustment.
At 160kHz adjust to maximum with L102 (LW antenna coil
move).
At 275kHz adjust to maximum with TC101.
Repeat this adjustment.
108MHz
At f
(87.5MHz) adjust to maximum with L103.
o
u
At f
(108MHz) adjust to maximum with TC2.
o
as low as
Repeat this adjustment.
a
At 90MHz adjust to maximum with L105 (bend).
At 106MHz adjust to maximum with TC1.
as low as
Repeat this adjustment.
a
Set the frequency to 152kHz ± 100Hz with VR101.
.
C
RR 3200 CD / RR 3500 CD
Adjustment Process
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