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TUNER BOARD (ATM-5) - LAYOUT DIAGRAM
1
2
3
4
1104
A
9020
9021
5102
5112
5111
B
1
3
5101
2105
C
2106
D
2104
2103
2
4
E
1001
9018
F
5107a
5107b
1
3
1
3
5106
5108
G
1
2
3
4
7 - 2
5
6
1001 E 1
5104
1104 A 2
5105
1110 F 6
5106
2103 D 2
5107a
A
2104 D 1
5107b
2105 C 2
5107c
2106 C 3
5108
2108 B 5
5111
2109 B 5
5112
2110 B 6
9018
B
2112 E 5
9020
2110
2113 D 6
9021
2115 G 5
9027
2108 2109
2117 F 6
2118 G 5
2120 C 6
5105
C
2121 E 6
2122 D 6
3101 F 6
2120
5101 C 1
5102 B 3
D
5104
2122
2113
9027
E
2112
2121
F
2117
1110
5107c
2115
2118
G
5
6
TUNER ADJUSTMENT TABLE
Waverange
Input Frequency
D 5
OSCILLATOR
C 6
G 3
F 3
F 4
87,35 MHz
F 4
FM
G 4
87,5 - 108 MHz
B 1
B 3
F 1
A 2
108,25 MHz
A 1
D 5
512 kHz
(520 kHz)
MW
525 - 1607 kHz
1)
(530 - 1710 kHz)
1635 kHz
(1730 kHz)
FM - RF
87,5 MHz
FM
87,5 - 108 MHz
108 MHz
VCO
FM
98 MHz
AM - IF
468 kHz
AM
connect pin 24 of
IC 7101 (AM Osc)
with short wire to
ground
AM -RF
560 kHz
MW
1500 kHz
1)
repeat
for USA /17
2)
RC-network serves for damping the IF-filter while adjusting the other one.
7 - 2
Input
Set tuned to
Adjust
Measure on
lower band end
5104
A
or
1
2
∆f = ±500kHz
upper band end
2106 C1
V
= 100µV
RF
lower band end
5105
C
or
1
2
∆f = ±30kHz
V
= 100µV
2106 C3
RF
upper band end
87,5 MHz
5101
A
or
1
2
∆f = ±500kHz
108 MHz
2106 C2
V
= 10µV
RF
7101
pin 30
A
2k2
3
98 MHz
3101
continuous
wave
V
= 1 mV
RF
V cc
IC 7101
10
100nF
5106
C
or
1
2
IC 7101
14
∆f = ±15kHz
100nF
5108
V
= 10mV
RF
see
remark 2)
B
560 kHz
5111
or
1
2
∆f = ±30kHz
1500 kHz
2106 C4
V
as low as
RF
possible
Scope / Counter
f
o
f
o
152 ±1 kHz
f
o
symmetric
symmetric
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