Philips AZ 3010 series, Руководство по обслуживанию

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TUNER BOARD - LAYOUT DIAGRAM
VARICAP ALIGNMENT
FM RF
FM IF
AM IF
AM RF
108MHz
87.5MHz
87.5MHz 87.5MHz
L303
check
4V –0.2V
0.9V –0.2V
1494kHz
558kHz
560kHz
1500kHz
1494kHz
558kHz
558kHz
560kHz
(or 560kHz)
1500kHz
TC302
MW ferrite coil
MW ferrite coil
TC302
MAX
FM
87.5 - 108MHz
1700kHz
530kHz
T301
check
3.4V - 3.5V
0.6V - 0.7V
1602kHz
531kHz
T301
check
3.6V - 3.7V
0.6V - 0.7V
108MHz 108MHz L302
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
MW
450kHz
4
1
4
4
A
FM
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, general with ferrite antenna, 070799
TUNER ADJUSTMENT TABLE
∆
f=–10kHz
V
RF
= 0.5mV
C
max.
symmetric
f
o
T301
MW
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
2)
RC network serves for damping the IF-filter while adjusting the other one.
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter
FM
87.5 - 108MHz
FM/MW-version, 9kHz grid
531 - 1602kHz
(as low as
possible)