XL-T300 (serv.man11). Test mode - Sharp Audio Service Manual (repair manual). Page 5

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1. Outline of tuner (radio) test mode
    The tuner test mode is intended to store the adjustment and measurement frequencies in the preset memory CH.   When

adjusting the tuner section in the production line, adjusting personnel are not required to set frequency.

2. Details of tuner test mode
    Press the "REW/PRESET DOWN" and "CD PLAY" buttons in POWER OFF state and turn on the power by the use of "ON/

STAND-BY" button to preset and store frequency for adjustment and measurement of destination specified by the AREA
terminal in the preset memory CH.  However, Ordinary 1 and Ordinary 2 are stored in the destinations (selected by SPAN
switching operation) when the test mode is obtained.

("FF

" + "MEMORY/SET" KEY SPAN CHANGE)

(As for frequencies to be preset and stored for each destination, refer to item 3.)
The tuner test mode is started from preset No.1.
The operations of test mode are identical with the ordinary operations of TUNER function.  FUNCTION switching is invalid.

It is necessary to discard the content of preset memory when the tuner test mode is ended; be sure to write "0000" or "1111"

bits in the memory to be checked for judging memory error at initial setting and to initialize memory.

When the tuner test mode is obtained, the following display lights for one second.

• The TUNER TEST02 mode is obtained with  >> + MEMORY + ON/STAND-BY. ->Turn off AC in the TEST02 mode to restore

the initial state.

Turn off POWER to protect the memory of TEST02 mode.
Turn off POWER again to obtain the ordinary operation while the data is stored in the memory (besides
TUNER).

If AC OFF state is maintained in this state for about 1/2 day, start is executed in the initial state.

• To clear the whole memory, insert the AC cord, pressing MEMORY + CD PLAY.

• The slant line sections of the table store no memory.

16-25

26

FM106.00 MHz

27

FM  90.00 MHz

28

FM

FM  98.00 MHz

29

MONO

FM108.00 MHz

30

FM  87.50 MHz

1

FM  87.50 MHz

2

FM108.00 MHz

3

FM

FM  98.00 MHz

4

STEREO

FM  90.00 MHz

5

FM106.00 MHz

6

AM  522 kHz

7

AM1620 kHz

8

AM

AM  990 kHz

9

AM  603 kHz

10

AM1404 kHz