Sangean WR-2, Service Manual

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WR-2
4-1. ALIGNMENT FOR AM SENSITIVITY
a. Required Instruments
AM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect a SSVM to the speaker TP7 and TP8 terminals.
(3) Connect an AM signal generator together with standard loop dummy
antenna and feed 30% modulated signal to the AM ferrite bar antenna L2.
(4) Tune the generator frequency to 1404 kHz.
(5) Tune the AM frequency to 1404 kHz and adjust TC1 to have a max.
reading on SSVM.
(6) Return the generator frequency to 603 kHz.
(7) Tune the AM frequency to 603 kHz and adjust L2 to have a max. reading
on SSVM.
AM
TC1
L2
(8) Repeat (4) to (7) as necessary to minimize tracking error.
c. Instrument Connection
L2
MW COIL
TC1
60 cm
The radio is located
perpendicularly to
the Loop Antenna
Loop Antenna
AM Signal Generator
TP8
TP7
DVM
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