Abgleichvorschriften / Adjustment Procedures
Advance CC
2 - 2
GRUNDIG Service
GB
Adjustment Procedures
1. Electrical Adjustment
Test equipment: DC Voltmeter, Test Generator, AF Voltmeter, Stereo Coder, Sweep Generator, Oscilloscope
1. MW Oscillator
2. LW Oscillator
3. MW Band Pass
4. LW Band Pass
5. AM IF
6. FM Oscillator
7. FM Stop Generator
8. FM Aerial Band
Pass
9. FM IF
10. Field Strength
Level
11. Stereo Decoder
Adjustment
Preparation
Adjustment Procedure
MW;
Connect a DC Voltmeter to FMP604.
LW;
Connect a DC Voltmeter to FMP604.
Connect a Test Generator to aerial input; MW; m = 0.3; f
mod
=1 kHz; E´
≤
10
µ
V (20dB
µ
V).
Connect AF Voltmeter to Loudspeaker Output.
Connect a Test Generator to aerial input; LW; m = 0.3; f
mod
=1 kHz; E´
≤
10
µ
V (20dB
µ
V).
Connect AF Voltmeter to Loudspeaker Output.
Connect a Test Generator to aerial input; MW; Frequency
1008kHz; m = 0,3; f
mod
= 1kHz; E´
≤
10
µ
V (20dB
µ
V).
Connect AF Voltmeter to Loudspeaker Output.
FM;
Connect a DC Voltmeter to FMP04.
Connect a Sweep Generator to aerial input; FM; Center
frequency 93.6MHz;
∆
f = 100kHz; E´ = 1mV (60dB
µ
V); no
modulation.
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 AF Voltmeter to Loudspeaker Output.
Connect a Test Generator to aerial input; Frequency
93.6MHz; f
mod
= 1kHz; dev. 60kHz; E´
≤
3
µ
V (10dB
µ
V).
Connect AF Voltmeter to Loudspeaker Output.
Connect a Test Generator to aerial input; Frequency
93.0MHz; E´ = 100
µ
V (40dB
µ
V); no modulation.
Connect DC Voltmeter between FMP102 (+) and
FMP106 (-).
Connect a Test Generator to aerial input;
Frequency 93.6MHz; E´
≤
3
µ
V (10dB
µ
V);
f
mod
= 1kHz with 22.5kHz deviation;
Pilot signal 19kHz with 7.5kHz deviation;
RDS 57kHz with 2kHz deviation;
modulate only left channel;
Connect AF Voltmeter to Loudspeaker Output right
channel.
Switch set off. Hold station button "2" depressed and
switch set on. Hold the button depressed until the first
sound (abt. 3sec.). Press button "AF" until 2 sounds could
be heard (abt. 6sec.). Press button "U III" until the sound
(display changes). With the buttons < resp. > select param-
eter set 41 (display shows e.g. 41 0004).
Align with L 612 (1) at 531kHz to 1.2V
±
50mV.
Check at 1602kHz for 7.5V
±
0.5V.
Align with L 613 (5) at 153kHz to 1.3V
±
50mV.
Check at 279kHz for 5.0V
±
0.5V.
Align alternating with L 603 (3) at 558kHz and with C 606 (4)
at 1548kHz for maximum AF output.
Align alternating with L 604 (7) at 162kHz and with C 607 (8)
at 261kHz for maximum AF output.
Align with F 601 (9) for maximum AF output.
Align with L 04 (A) at 93.0MHz for 2.7V
±
50mV.
Check at 108.0MHz for 6.0V
±
0.5V.
Align F 105 (I) for a symmetrical stop impulse.
93,0MHz
+5V
0V
∆
f =
±
28kHz
Align alternating with L 03 (C) and L 01 (D) for AF maxi-
mum.
Align with F 101 (F) for AF maximum.
Align with R 105 (H) for +400mV
±
20mV.
With the station button "4" the value can be changed (valid
range 0…7). Afterwards press button "U III" until the sound
(display changes), otherwise the new value is not used!
Change the value for minimum signal on the right channel.
If you changed an other parameter by mistake you can find
its correct value in the parameter table on page 2 - 4.
Dolby noise reduction under license from Dolby Laboratories Licensing Corporation.
„DOLBY“ and the double D Symbol
g
are trademarks of Dolby Laboratories Licensing Corporation.
NR = Noise Reduction.
