SCD 5390 RDS / SCD 5690 RDS
Abgleichvorschriften / Adjustment Procedures
GRUNDIG Service
2 - 2
GB
Adjustment Procedures
Test equipment:
DC Voltmeter, AF Voltmeter, Test Generator, Stereo Coder, Sweep Generator
1. MW Oscillator
2. LW Oscillator
3. MW Band Pass
4. LW Band Pass
5. AM IF
6. FM Oscillator
7. FM Demodulator
8. FM Band Pass
9. FM Aerial Band
Pass
10. FM IF
11. FM Stop
Generator
12. Field Strength
Level
14. Dolby
MW
;
Connect a
DC Voltmeter
to
FMP604
.
LW; Frequency 153kHz.
Connect a
DC Voltmeter
to
FMP604
.
Connect a Test Generator to aerial input; MW; m = 0.3;
f
mod
= 1kHz; 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
= 1kHz; E´
≤
10
µ
V (20dB
µ
V).
Connect
AF Voltmeter
to
Loudspeaker Output
.
Connect a Test Generator to aerial input; MW; Frequency
990kHz
; 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 Test Generator to aerial input; Frequency
93.0MHz
; f
mod
= 1kHz; dev. 22.5kHz; E´
≤
100
µ
V (40dB
µ
V).
Connect
AF Voltmeter
to
Loudspeaker Output
.
Connect a Test Generator to aerial input; Frequency
93.0MHz
; 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
93.0MHz
; 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
93.0MHz
; f
mod
= 1kHz; dev. 60kHz; E´
≤
3
µ
V (10dB
µ
V).
Connect
AF Voltmeter
to
Loudspeaker Output
.
Connect a Sweep Generator to aerial input; FM; Center
frequency
93.0MHz
;
∆
f = 100kHz; E´ = 1mV (60dB
µ
V); no
modulation.
Connect an
Oscilloscope
to
FMP107
.
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 (-)
.
Play Test Cassette 448A (315Hz Dolby part).
Connect
AF Voltmeter
to
FMP1107
(left channel) resp.
FMP1108
(right channel).
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
2.6V
±
20mV
.
Align with
F 105 (I)
for
AF maximum
.
Align with
L 03 (C)
for
AF maximum
.
Align with
L 01 (D)
for
AF maximum
.
Align with
F 101 (F)
for
AF maximum
.
Align
F 105 (I)
for a
symmetrical stop impulse
.
93,0MHz
+5V
0V
∆
f =
±
28kHz
Align with
R 105 (H)
for
+400mV
±
20mV
.
Adjust
R 1110Z (L)
for the left channel resp.
R 1113Z (M)
for the right channel for
490mV
.
Adjustment
Preparation
Adjustment Procedure
