Abgleichvorschriften / Adjustment Procedures
4
GRUNDIG Service
Smartradio / Smartradio CC
GB
Adjustment Procedures
1. Main Board
Test equipment: DC Voltmeter, Test Generator, AF Voltmeter, Stereo Coder, Sweep Generator, Oscilloscope
Calling up the Parameter List:
Switch off the set. Press and hold depressed station button 2 and switch on the set. Hold the station button 2 depressed until the frequency is displayed.
Press and hold depressed the TP button for about 10 seconds until the second sound. Press the FM button to enter the Parameter Mode. The display
now shows e.g.
00 0940
(parameter 00 and value 0940). Rotate the right roraty knob to select the desired parameter. Change the value with the
station buttons 1 (
0
940
), 2 (
0
9
40
), 3 (
09
4
0
) and 4 (
094
0
). To store the new value select another parameter with the right rotary knob.
If you changed an other parameter by mistake you can find its correct value in the parameter table on page 5.
1. FM Oscillator
2. Stop Generator
3. FM RF and IF
4. Fieldstrength
5. Stereo Decoder
Adjustment
Preparation
Adjustment Procedure
Connect a DC Voltmeter to FMP07.
Connect a sweep generator to aerial input.
Center frequency 93.6MHz;
∆
f =
±
100kHz;
no modulation; E´ = 1mV (60dB
µ
V);
Connect an Oscilloscope to FMP107.
Connect a Test Generator to aerial input;
Frequency 93.6MHz;
f
mod
= 1kHz; Dev. = 22.5kHz; E´ = 3
µ
V (10dB
µ
V).
Connect an AF Voltmeter to loudspeaker outputs.
Connect a Test Generator to aerial input;
Frequency 93.6MHz;
no modulation; E´ = 100
µ
V (40dB
µ
V).
Connect a DC Voltmeter between FMP102 (+) and
FMP109 (-).
Connect a Test Generator via a Stereo Coder to aerial
input;
Frequency 93.6MHz;
f
mod
1kHz at 22.5kHz dev.;
Pilot 19kHz at 7.5kHz dev.;
RDS 57kHz at 1.2kHz dev.; E´ = 3mV (70dB
µ
V);
modulate only the left channel.
Connect an AF Voltmeter to loudspeaker output right
channel.
Call up the parameter list (see above).
Select parameter 37.
Align with L04 (A) at 93.6MHz for 2.7V
±
50mV.
Align F105 (E) for a symmetrical stop impulse.
93.6MHz
+5V
0V
∆
f
≤
±
35kHz
Align alternating with L01 (B) and L03 (C) for maximum.
Align with F101 (D) for maximum.
Align with R105 (F) for +600mV.
Set the parameter value for minimum AF voltage.
Adjustment
Preparation
Adjustment Procedure
Tape Speed
Connect Frequency Counter to Loudspeaker Output.
Play Test Cassette 3150Hz.
With Motorpoti adjust for 3150Hz.
Motorpoti
2. Cassette Drive
Test equipment: Frequency Counter, Test Cassette 3150Hz (e.g. 448A)
