Philips FW-R8/17 Service Manual page 42

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TUNER ADJUSTMENT TABLE
Waverange Input frequency
VARICAP ALIGNMENT
FM
87.5 - 108MHz
(50kHz grid)
MW
531 - 1602kHz
(9kHz grid)
LW
153 - 279kHz
(3kHz grid)
FM - IF
continuous wave
FM
shortcircuit pin 21
of IC7108 to ground
FM - VCO
FM
continuous wave
DISTORTION
90% Left + 9% pilot
FM
AM IF
as low as possible
MW
continuous wave
2)
AM RF
MW
LW
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)
2)
For AM RF adjustments the original frame antenna has to be used !
Repeat
( TUNER 95 FM/MW/LW - version with AM-frame aerial )
Input
98MHz 1mV
A
98MHz 1mV
A
98MHz 1mV
A
mod=1kHz
450kHz
∆f=10kHz
100nF
50R
C
450kHz
558kHz
B
1494kHz
∆f = ±30kHz
V as low as
RF
possible
198kHz
Digitized in Heiloo Netherlands
7A-2
Tuned to Adjust
108MHz check
87.5MHz check
1602kHz 5123
531kHz check
279kHz 5122
153kHz check
98MHz 5107
98MHz 3142
mixcoil
inside tuner
98MHz
1110
5111
C
5112
MW
5114
558kHz 5102
1494kHz 2106
198kHz 5103
Output Scope/Voltmeter
7...9V
1.3...2V
8.3V ±0.2V
6
1V ±0.4V
8.3V ±0.2V
1V ±0.4V
1
0mV ±3mV
2
152kHz ±1kHz
3
4
min. distortion
7
f
o
symmetric
1
0mV ±2mV
2
7
f
o
symmetric
Tuner 95, 3104 217 04120 (2000-02-17)
2/4/2018
1)