Sangean DPR-25+, Service Manual

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5. ALIGNMENT FOR FM TUNING SENSITIVITY
a. Required Instruments
FM Signal Generator (frequency range up to 220 MHz)
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on radio.
(2) Connect a SSVM to speaker TP7 and TP8.
(3) Connect a FM signal generator to TP10 and TP11.
(4) Set the signal generator to 22.5 kHz deviation with 1 kHz modulation.
(5) Always tune the generator frequency to exactly same as the radio band frequency
before adjustment.
(6) Tune the FM frequency to 106MHz and adjust TC2 to have a max audio output.
(7) Tune the FM frequency to 90MHz and adjust L8 to have a max audio output.
FM
TC2
L8
(8) Repeat (6) to (7) as necessary to minimize tracking error.
c. Instrument Connection
L8
TC2
TP11
TP10
SSG
TP8
TP7
DVM
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