7-2
VARICAP ALIGNMENT
FM RF
FM IF
VCO
AM IF
AM RF
3)
108MHz
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
279kHz
153kHz
1602kHz
531kHz
5130
check
5122
check
5123
check
8V
±
0.2V
4.3V
±
0.5V
(1.2V
±
0.5V)
8V
±
0.2V
1.1V
±
0.4V
8V
±
0.2V
1.1V
±
0.4V
1494kHz
558kHz
560kHz
5102
1500kHz
5103
198kHz
1494kHz
558kHz
560kHz
1500kHz
198kHz
2106
5102
2106
3142
152kHz
±
1kHz
1)
98MHz
5112
MAX
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
LW
153 - 279kHz
MW
FM/MW/LW- version, 9kHz grid
531 - 1602kHz
1700kHz
530kHz
5123
check
8V
±
0.2V
1.1V
±
0.4V
1602kHz
531kHz
5123
check
6.9V
±
0.2V
1.1V
±
0.4V
108MHz
108MHz
2155
5131
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
FM
MW
LW
98MHz, 1mV
continuous wave
450kHz
connect pin 6 of
IC 7101 (AM Osc.)
with short wire to
ground (pin 4)
Use service test program. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
4
1
3
4
4
A
A
5119
FM
10.7MHz, 50mV
continuous wave
2
F
mod=1kHz
∆
f=
±
22.5kHz
1)
If sensitivity of frequency counter is too low adjust to max. channel separation
(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)
Repeat
ECO5, discr. coil, 090797
TUNER ADJUSTMENT TABLE
( ECO5 FM/MW- and FM/MW/LW - versions with AM-frame aerial )
∆
f=
±
15kHz
V
RF
= 3mV
C
see
remark 2)
220R
100nF
36
IC 7101
220R
100nF
40
IC 7101
2141
shortcircuit
to block AFC
21
IC 7101
max.
symmetric
f
o
AM AFC
MW
C
continuous wave
V
RF
= 10mV
5111
5114
2
0
±
2 mV DC
0
±
3 mV DC
MW
4)
FM/MW/LW- and FM/MW-version
( 9kHz grid)
531 - 1602kHz
B
∆
f =
±
30kHz
V
RF
as low as
possible
max.
symmetric
f
o
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
3)
For AM RF adjustments the original frame antenna has to be used !
2)
RC network serves for damping the IF-filter while adjusting the other one.
4)
MW has to be aligned before LW.
Waverange
Input frequency
Input
Tuned to
Adjust
Output
Scope/Voltmeter
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
FM/MW-version, 9kHz grid
531 - 1602kHz
