PHILIPS AZ3012
Instrukcja Serwisowa

6-2

6-2

TUNER BOARD - LAYOUT DIAGRAM

TUNER ADJUSTMENT TABLE
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter

VARICAP ALIGNMENT FM 87.5 - 108MHz MW
FM/AM-version, 10kHz grid

108MHz 87.5MHz 1700kHz 530kHz 1602kHz 531kHz

L303 check T301 check T301 check

4V �0.2V 0.9V �0.2V

1

3.4V - 3.5V 0.6V - 0.7V 3.6V - 3.7V 0.6V - 0.7V

530 - 1700kHz
FM/MW-version, 9kHz grid

531 - 1602kHz FM IF FM FM RF FM 87.5 - 108MHz 108MHz 87.5MHz AM IF

A
mod=1kHz �f=�22.5kHz

108MHz 87.5MHz

L302

4

MAX

C
MW 450kHz �f=�10kHz VRF = 0.5mV
(as low as possible)

558kHz (or 560kHz)

T301

4
fo symmetric

AM RF MW
FM/MW-version, 9kHz grid

1494kHz 558kHz 1500kHz 560kHz

B

1494kHz 558kHz 1500kHz 560kHz

TC302
max. fo symmetric
ECO6, general with ferrite antenna, 070799

531 - 1602kHz MW
FM/AM-version, 10kHz grid

MW ferrite coil

4
530 - 1700kHz
�f = �30kHz VRF as low as possible

TC302
MW ferrite coil

1) If sensitivity of frequency counter is too low adjust to max. channel separation

2) RC network serves for damping the IF-filter while adjusting the other one.

(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)

Repeat