GRUNDIG Service
OVATION CDS 6580 SPCD
2 - 2
Adjustment Procedure
Tuner
Test equipment:
Sweep / Signal Generator, Distortion Meter, Oscilloscope, Digital Voltmeter
Note:
The frontend is a completely preadjusted module. Only the IF filter must be adjusted to the IF amplifier (Adjustment 4).
The values of the tuning voltages are as follows: 87.5MHz = typ. 1,6V; 108MHz = typ. 8.0V.
Adjustment
Preparation
Adjustment Procedure
1. AM IF
2. AM Oscillator
3. AM Band Pass
4. FM IF
5. 19kHz Filter
AM
;
Sweep Generator 450kHz
to
AM Aerial Input
;
Ue > 60dB
µ
V;
Oscilloscope
to
Testpoint TP5, IC502-(19)
.
AM
,
1620kHz
;
Digital Voltmeter
to
Testpoint TP3
.
AM
;
Couple
Signal Generator
via
Loop Antennas
;
Ue > 50dB
µ
V; f
mod
= 1kHz;
Oscilloscope
to
Loudspeaker Output
.
FM, 98.0MHz
Signal Generator
to
FM Aerial Input
;
Ue = 20dB
µ
V; f
mod
= 1kHz; Deviation = 75kHz;
Distortion Meter
to
Loudspeaker Outputs
.
FM
;
Signal Generator
to
FM Aerial Input
;
Ue = 50dB
µ
V; f
mod
= 19kHz;
Oscilloscope
to
Loudspeaker Outputs
.
Adjust with
T501
for
Maximum
.
Adjust with
L502
for
8.25V
±
0.25V
.
Adjust alternating with
L501
at
558kHz
and with
TC501
at
1440kHz
for
AF Maximum
.
Adjust with
IF Filter
A
for
Distortion Minimum
.
Adjust with
LPF501
(
left channel
) and with
LPF502
(
right
channel)
for
AF Minimum
.
TP3
TP5
Summary of Contents for ovation cds 6580 spcd
Page 5: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 5...
Page 6: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 6...
Page 7: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 7...
Page 9: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 9...
Page 10: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 10...
Page 11: ...GRUNDIG Service OVATION CDS 6580 SPCD 1 11...
Page 17: ...GRUNDIG Service OVATION CDS 6580 SPCD 3 Verdrahtungsplan Wiring Diagram...
