Tuner Board Atm5 - Layout Diagram; Tuner Adjustment Table - Philips AJ3950 Service Manual

TUNER BOARD ATM5 - LAYOUT DIAGRAM

FM/MW versions
9-2
1001 E1 2122 D6
1104 A2 3101 E6
1110 F6 5101 C1
2103 D2 5102 B3
2104 D1 5104 D5
2105 C2 5105 C6
2106 C3 5106 G2
2108 B5 5107a F3
2109 B5 5107b F4
2110 B6 5107c F4
2112 E5 5108 G3
2113 D6 5111 B1
2115 F5 5112 B2
2117 F5 9018 F1
2118 G6 9020 A2
2120 C6 9021 A1
2121 E6 9027 D5
2101 F6 3121 F1
2102 E7 6101 G7
2114 E3 6102 G7
2116 F3 7101 E5
2119 G3 7102 F2
3102 E1 9010 F7
3104 E2 9011 E7
3108 E3 9012 F3
3109 F2 9013 F1
3110 G2 9015 E4
3113 D2 9017 E6
3114 D4 9026 E3
3120 F2 9028 G6

TUNER ADJUSTMENT TABLE

Waverange Input Frequency Input
OSCILLATOR
87,35 MHz
FM
A
87,5 - 108 MHz
D f = ±500kHz
108,25 MHz
V = 100µV
RF
512 kHz
C
(520 kHz)
MW
525 - 1607 kHz
D f = ±30kHz
1)
(530 - 1710 kHz)
1635 kHz
V = 100µV
RF
(1730 kHz)
FM - RF
87,5 MHz
A
FM
87,5 - 108 MHz
D f = ±500kHz
108 MHz
V = 10µV
RF
VCO
A
FM
98 MHz
continuous
wave
V = 1 mV
RF
AM - IF
468 kHz
C
AM connect pin 24 of
IC 7101 (AM Osc)
D f = ±15kHz
with short wire to
V = 10mV
RF
ground
AM -RF
B
560 kHz
MW
D f = ±30kHz
1500 kHz
V as low as
RF
possible
1)
repeat for USA /17
2)
RC-network serves for damping the IF-filter while adjusting the other one.
9-2
Set tuned to Adjust Measure on Scope / Counter
lower band end
5104
or
1 2
upper band end
2106 C1
lower band end
5105
or
1 2
2106 C3
upper band end
87,5 MHz 5101
or
1 2
108 MHz 2106 C2
7101
pin 30
2k2
3
98 MHz 3101 152 ±1 kHz
V cc
IC 7101
10
100nF
5106
or
1 2
IC 7101
14
100nF
5108
see
remark 2)
560 kHz 5111
or
1 2
1500 kHz 2106 C4
f
o
f
o
f
o
symmetric
symmetric
PCS 107 263