Grundig Sono Clock 420 - Page 2

SonoClock 420
Alignment Information
Model : GRUNDIG SC420
Ref. No. : SC420
Date : 21-Jan-00
A) FM Radio section
1) FM IF
INPUT SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
TP3, 210.7MHz TP5,2 Quiet Point T1,2 Max. o/p symmetrical Vol. at min. position
2) RF VOLTAGE
BAND SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
FM - - TP4,2 87.5MHz L2 1.9 ~ 2 .1V high end 7.5 ~8V
3) FM RF
INPUT SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
TP1,2 90MHz Speaker 90MHz L1 Max. o/p Vol. at max. position
TP1,2 106MHz “ “ 106MHz TC1 “ “ “ “
4) 75KHZ CRYSTAL
OUTPUT ADJUST ADJUST FOR REMARK
TP6,7 TC2 75K± 1HZ
Note :
1. Use digital meter to measurement each required voltage on above items
2. Use weak signal in RF alignment
3. Radio & LCD board must be connected before alignment
4. Use the frequence counter to measurement each required frequence on about items.