SD-NX10 (serv.man6). Part 3 - Description of circuit, Block diagrams - Sharp Audio Service Manual (repair manual). Page 3

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From power off state to TEST mode
Press the +10 Track Up button (+10) and MD REC LEVEL/MD Fast Forward button ( 

 ) simultaneously while the POWER

button of the main unit is on to obtain the TEST mode. Initially, the version is displayed.
Thereafter press the MD REC LEVEL/MD Fast Forward button ( 

 ) to select the TEST mode and then press the +10 Track

Up button (+10) to determine it.
Press the DIRECT key during version display to obtain the designated TEST mode directly.

1

CD TEST

CD PLAY (CD 

 )

CD MENU

2

MD TEST

MD PLAY (MD 

 )

MD MENU

*3

MD DISP TEST

ERASE

MD DIS MENU

*4

REC AGING

MD REC ( 

 REC)

REC MENU

5

AUX TEST

AUX (DEMO)

AUX MENU

*6

CALENDAR TEST

CD STOP (CD 

 )

DATE MENU

7

KEY TEST

VOLUME UP (VOLUME 

 )

KEY MENU

8

TUNER TEST

TUNER/BAND

TUN MENU

*9

LINE TEST

MD STOP (MD 

 )

MD-LINE MENU

The TEST modes 3, 4, 6 and 9 marked with * are under technical examination; their descriptions are omitted.

In each TEST mode, press the POWER button to display COMPLETE for 1 second and then cancel the TEST mode.
In the MD TEST mode, press the POWER button again.