Grundig Aura User Manual
Abgleichvorschriften / Adjustment Procedures
AURA
8
GRUNDIG Service
Adjustment
Preparation
Adjustment Procedure
2. Tape Drive
Test equipment: Frequency counter, Test Cassette 448A (Part No. 35079 023 0000)
Tape Speed
Adjustment
Preparation
Adjustment Procedure
Insert Test Cassette 448A and play 3150Hz part.
Connect a frequency counter to loudspeaker outputs.
Connect a frequency counter to loudspeaker outputs.
With the ´Motorpoti´ adjust for 3150Hz
±
100Hz.
Motorpoti
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EMK
Rg
50
Ω
Kabel
50
Ω
37.5
Ω
55
Ω
15pF
150
Ω
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37.5
Ω
60pF
E´
E´= EMK - 26dB
AM
For adjustment use the aerial dummies for AM resp. FM
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EMK
Rg
50
Ω
Kabel
50
Ω
10
Ω
45
Ω
10nF
60
Ω
75
Ω
E´
E´= EMK - 6dB
FM
12. Stereo Crosstalk
13. FM search level
stop
14. Power Amplifier
Over Temperature
Connect a Test Generator via a Stereo Coder to aerial
input; Frequency 95.0MHz; f
input; Frequency 95.0MHz; f
mod
1kHz at 22.5kHz dev.; Pilot
19kHz at 7.5kHz dev.; RDS 57kHz at 1.2kHz dev.; E´ = 1mV
(60dB
(60dB
µ
V); modulate only the left channel.
Connect an AF Voltmeter to loudspeaker outputs.
Call up the extended expert mode (see above).
Select parameter 53.
Call up the extended expert mode (see above).
Select parameter 53.
Connect a Test Generator to aerial input; Frequency
95.1MHz; no modulation;
Call up the extended expert mode (see above).
Apply a signal with E´ = 80
95.1MHz; no modulation;
Call up the extended expert mode (see above).
Apply a signal with E´ = 80
µ
V (38dB
µ
V). Set DX to OFF.
Apply a signal with E´ = 8
µ
V (18dB
µ
V). Set DX to ON.
In ´cold´ condition measure the voltage U
m
at FMP1609.
Calculate the parameter value: W = (U
m
- 340mV) / 16.9mV.
e.g.: U
m
= 1.20V. W = (1200mV - 340mV) / 16.9mV.
W = 860mV / 16.9mV = 43.8 = 44.
Set the parameter value for minimum AF voltage on the
right channel.
right channel.
Change Parameter value 03 until search just stops.
Change Parameter value 02 until search just stops.
Change Parameter 65 to the calculated value.
e.g.:
e.g.:
E
65 44
.
Dolby noise reduction under license from Dolby Laboratories Licensing Corporation.
„DOLBY“ and the double D Symbol
„DOLBY“ and the double D Symbol
g
are trademarks of Dolby Laboratories Licensing Corporation.
NR = Noise Reduction.