Grundig Satellit 2400 - Service Manual

Comparison and Test specification
Alignment Sequence
Wobbulator Output
connected to
Indicator Connection
Alignment
IF-Filter 12
at MP 502
Probe loose on collector
T502 (MP 503)
(I) For maximum
IF-Filter 11 and 10
at MP 501
(II) and (III) for maximum
IF-Filter 9 and 8
at MP 401
(IV) For symmetry
(V) for Maximum and symmetry
Filters 9 and 8 only in connection
Adjust with the ceramic oscillator.
b) AM 2,46 MHz-Oszillator
K2-6 turned ON
Alignment Sequence
Signal Generator
coupled to
Alignment Indication
Alignment
2. Oscillator 2.4MHz
2 MHz at MP 401
Output Meter
(VII) Visually to center of C 459
(VI) for maximum
(VII) Fine adjustment C 459
Removal of Chassis
The notes marked with numbers refer to the expansion sketch embossed
in the bottom of the housing.
a) Pull out the mains cable connector and remove any batteries or the
rechargeable batteries that may have been inserted.
b) Remove the grip shell after loosening the 2 Phillips screws (1), (2).
c) remove the back panel (3).
d) Unsolder the connections of the two loudspeakers, pull off the antenna
cable and unplug the plug connection to the mains transformer.
e) Pull off the knobs and unscrew the 6 nuts of the controller units
(potenciometers) (4).
f) Release the four latches (5), (6), (7), (8) and remove the chassis from the
housing.
Alignment Instructions
All the voltages must be adjusted with the aid of sufficiently accurate
instrument (e.g. GRUNDIG DM 44), and the given voltages should be kept
within the stated tolerances.
I. Adjustment of the Operating Points
No signal, AM button pressed, range switch on KW1 U8 = 9V:
1. Adjust the emitter current of T 502 with R 504 so that the voltage drop
across R506 is 1.3V
2. The control voltage at PIN 9 of IC 401 is set to 0.15V with the
resistance controller R 409. An analogue measuring device (e.g.
GRUNDIG UV 5 A) should be used.
3. With the BFO/SSB section switched ON, adjust the trimmer
resistor R 703 so that the voltage drop across R704 is 4V.
4. UB = 7.2V:
At a voltage of 7.2 V, set the display instrument to the battery check
position with the R 658 controller so that the deflection of the
instrument is on the Dryfit Accu-mark.
II. Adjusting the Charging Voltage UL
With a mains supply of 220V AC and the receiver switched OFF, the
charging voltage UL is to be measured with an equivalent resistance
of 1 kohm and an electrolytic capacitor of 1000 uF (connect in
parallel to the charging contact and minus), the nominal value of
which should be between 9.05 and 9.35 V.
With a voltage of UL < 9.05 V, R 653 (connect separating point X)
must be connected, with a voltage of UL > 9.35 V, R 654 (connect
separating point Y) must be switched on.
III. Frequency Counter
Feed in 32.000MHz/80 mV to St V802 (3) and 2.460 MHz/50 mV to St
V 802 (1) and with C0811 set the display to 30.000 MHz.
IV. AM Alignment
Mod. frequency <1000 Hz
1. AM.IF
a) AM-IF Alignment 460kHz

Summary

Comparison and Test Specification

Alignment Instructions

I. Adjustment of the Operating Points

Adjust emitter current of T 502 and voltage drop across R506.

II. Adjusting the Charging Voltage UL

Measure and adjust charging voltage UL with an equivalent resistance and capacitor.

III. Frequency Counter

Input frequencies to St V802 and set display to 30.000 MHz with C0811.

IV. AM Alignment

Detailed alignment procedures for AM reception, including IF and oscillator.

V. FM Matching

Procedures for FM tuning, AFC, muting, and stereo matching.

FM Alignment Procedures

2. FM-IF Alignment 10,7 MHz

Align FM IF filters to maximum and symmetry using a wobbulator.

3. FM-RF Alignment

Align FM oscillator, filter, and aerial circuits for optimal performance.

4. Stereo Matching

Adjustments for 19 kHz setting, stereo RF level, and 57 kHz lock.

Grundig Satellit 2400 Specifications

General

Type	Radio
Model	Satellit 2400
Tuning System	Analog
Wave bands	FM, MW, LW, SW
FM frequency range	87.5-108 MHz
Main principle	Superheterodyne
Power Supply	AC/DC
Shape	Portable
Cassette Deck	No
Material	Plastic and metal
Loudspeaker	2 Loudspeakers