QT-CD250 (serv.man6). Including circuit diagrams - Sharp Audio Service Manual (repair manual). Page 12

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Set the function switch to "TUNER" when pressing the "REVIEW(PRESET DOWN )" button together with "BAND(REPEAT)"
button.

The LCD displays indicate the "TunEr" for several seconds. after that, the LCD displays indicate to the normal frequency.

Note:
1. The Preset Channel can be change when press the "PRESET UP (CUE) button either "PRESET DOWN (REVIEW)" button.
    PRESET UP button is pressed : P-01   ->   P-02   -> > > > >   P-15   ->   P-01
    PRESET DOWN button is pressed : P-15   ->   P-14   -> > > > >   P-01   ->   P-15
2. The Tuner Mode can be change when press the "BAND (REPEAT)" button.
    BAND button is pressed : FM stereo   ->   FM mono   ->   AM   ->   FM stereo

P-01

FM 87.50 MHz

FM 87.50 MHz

FM 87.5 MHz

STEREO

P-02

FM 108.00 MHz

FM 108.00 MHz

FM 108.0 MHz

STEREO

P-03

FM 98.00 Hz

FM 98.00 Hz

FM 98.0 Hz

STEREO

P-04

FM 90.00 MHz

FM 90.00 MHz

FM 90.0 MHz

STEREO

P-05

FM 106.00 MHz

FM 106.00 MHz

FM 106.0 MHz

STEREO

P-06

AM 522 KHz

AM 531 KHz

AM 530 KHz

P-07

AM 1620 KHz

AM 1602 KHz

AM 1620 KHz

P-08

AM 990 KHz

AM 990 KHz

AM 990 KHz

P-09

AM 603 KHz

AM 603 KHz

AM 600 KHz

P-10

AM 1404 KHz

AM 1404 KHz

AM 1400 KHz

P-11

FM 106.00 MHz

FM 106.00 MHz

FM 106.0 MHz

MONO

P-12

FM 90.00 MHz

FM 90.00 MHz

FM 90.0 MHz

MONO

P-13

FM 98.00 MHz

FM 98.00 MHz

FM 98.0 MHz

MONO

P-14

FM 108.00 MHz

FM 108.00 MHz

FM 108.0 MHz

MONO

P-15

FM 87.50 MHz

FM 87.50 MHz

FM 87.5 MHz

MONO

Set the function switch to "TUNER (or CD)"  when pressing the "REVIEW(PRESET DOWN )" button together with "MEMORY"
button.

All of the segments will light up.