Layout Diagram; Tuner Adjustment - Philips AZ 3013/00 Service Manual

TUNER BOARD - LAYOUT DIAGRAM
6 - 2
TUNER ADJUSTMENT TABLE
Waverange Input frequency Input
VARICAP ALIGNMENT
FM
87.5 - 108MHz
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
FM/MW-version, 9kHz grid
531 - 1602kHz
FM IF
FM
FM RF
FM
108MHz A
87.5 - 108MHz
mod=1kHz
87.5MHz
∆f=–22.5kHz
AM IF
C
450kHz
∆f=–10kHz
MW
V = 0.5mV
RF
(as low as
possible)
AM RF
1494kHz B
MW
FM/MW-version, 9kHz grid
531 - 1602kHz
558kHz
MW
1500kHz
∆f = –30kHz
FM/AM-version, 10kHz grid
V as low as
RF
530 - 1700kHz 560kHz
possible
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
6 - 2
Tuned to Adjust Output Scope/Voltmeter
108MHz L303 4V –0.2V
87.5MHz 0.9V –0.2V
check
1700kHz T301 3.4V - 3.5V
1
530kHz check 0.6V - 0.7V
1602kHz T301 3.6V - 3.7V
531kHz check 0.6V - 0.7V
108MHz L302
4
MAX
87.5MHz
558kHz
T301 4
(or 560kHz)
f
o
symmetric
1494kHz TC302
558kHz
MW ferrite coil
4
1500kHz TC302
f
o
symmetric
560kHz
MW ferrite coil
ECO6, general with ferrite antenna, 070799
2)
RC network serves for damping the IF-filter while adjusting the other one.