Alignment Instructions - Sangean U3 Service Manual

1. ALIGNMENT FOR AM
a. Required Instruments:
AM IF Sweep Generator with scope
b. Alignment Procedure
Mode Adjustment
AM T3
c. Instrument Connection
C28+
100uF

ALIGNMENT INSTRUCTIONS

(1) Press the power button to turn on the radio.
(2) Connect the input terminal of AM IF sweep generator in series with a resistor of 1.2KΩ
to the C28 positive and TP14.
(3) Connect the RF output terminal of AM IF sweep generator to another test point TP3.
(4) Connect a 100μF electrolytic capacitor to test point TP14 and theC28 positive .
(5) Adjust T3 to have a max. output with a marker frequency of 450 kHz on the sweep
scope.
T3
TP14
6
Procedure
450KHz Marker
TP1
RF
IN
OUT
1.2KΩ
TP14
AM IF Sweep Generator
TP3
2.2KΩ