7A-3
7A-3
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 3.3k
Ω
to Vcc
Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
4
1
3
5
5
A
A
5119
FM
10.7MHz, 45mV
continuous wave
2
D
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
ECO6, Sys + PA with frame aerial, 070799
TUNER ADJUSTMENT TABLE
( ECO6 FM/MW- and FM/MW/LW - versions with AM-frame aerial )
∆
f=
±
10kHz
V
RF
= 0.5mV
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
= 2mV
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
(as low as
possible)
ECO6 System non Cenelec stage .3, 120900
TUNER BOARD ECO6
Systems non Cenelec
/
componentside view
1101 A6
1102 B6
1103 D6
1120 A4
1130 B5
1131 D5
1132 A5
2106 C5
2107 B5
2128 C4
2129 B4
2133 D2
2138 C2
2144 B2
2155 C4
3142 D2
5102 D6
5109 A3
5110 B3
5111 B4
5112 A3
5114 A2
5119 C2
5121 B2
5123 D5
5130 D3
5131 D4
7112 C1
9101 A2
9103 B2
9104 B5
9105 B1
9106 B3
9107 D4
9108 C4
9109 D2
AM FRAME AERIAL
FM 75
Ω
B
A
TUNER BOARD ECO6
Systems - non Cenelec
/
copperside view
2101 B4
2102 B1
2103 D4
2104 B4
2105 C1
2112 B5
2119 D3
2120 D3
2124 D3
2125 D3
2126 D6
2127 C5
2130 D5
2131 C5
2132 D6
2134 D7
2135 D7
2136 A4
2137 A4
2139 C6
2140 C6
2141 C6
2143 C7
2145 A5
2146 B7
2147 A5
2148 B6
2149 D6
2150 B5
2152 C5
2153 C5
2154 C4
2159 C5
2161 A6
2163 B6
2164 C6
2165 C4
2166 B6
2167 B6
2169 A4
3101 D5
3102 C3
3103 C4
3104 B4
3105 C4
3113 B5
3119 B5
3132 D5
3134 D3
3141 C5
3143 D6
3144 B7
3145 C5
3146 C7
3152 A4
3153 A4
3154 C7
3155 C7
3156 A6
3157 A6
3158 A4
3159 A5
3160 A5
3161 A5
3167 B7
3168 C7
3169 B6
3170 A6
3172 C7
3176 D6
3181 D4
4103 B5
4106 C4
4107 C5
4108 C5
6103 B3
6105 C3
6106 C3
6107 C7
6120 A6
6130 D4
6131 C4
7101 C5
7102 D4
7103 D7
7111 A5
7119 B5
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
ECO6 Systems non CENELEC stage .3, 120900
41..
in schematic diagram)
(not all items shown
SMD jumper
E
B
C
A
K
1
2
7
8
4
D
A
C
1
2
5
3
Vdd
Vcc2
Vcc1
