ICF-CDK50 - Sony Audio Service Manual (repair manual). Page 10

TEST  OF  LCD, LED  AND  KEY
Mode that test LCD, LED and key.
Procedure:
1.  Press three keys of the [OFF], [PRESET 1] and [MEGA BASS] simultaneously. Then turn the power on.
2.  Version number of the microcomputer is displayed when entering the mode.
3.  All segments light when [TIMER PUSH START/STOP] is pressed.
4.  When the key is pressed, the segment corresponding to the key is turned off. Refer to the fi gure below for the correspondence of the key 

and the segment.

5.  After all keys are pushed, [TIMER PUSH START/STOP] is pushed again. Test mode is ended, and reset start is done. 

CD  TEST  MODE
Procedure:
1.  Turn the power on.
2.  Insert the CD, and play it.
3.  Set the test mode by momentarily shorting both of TP410 ties to TP411 on the LCD board. (The message “002 88” is displayed on the 

liquid crystal display)

4.  Operate it referring to the fi gure of next page.

CLOCK

FM2,FM1,RADIO,0C,0B,ST, 

MODE

3D,3C,3B,AUDIO IN

Z

 OPEN/CLOSE

3E,3G,3F,3A,TIMER-LED,

AUDIO IN

4E,4G,4F,4A

PRESET-1

PM,AM,FM MONO,MEGABASS, TUNE/TRACK .

4D,4C,4B,SHUF

PRESET-2

1E,1G,1F,1A

TUNE/TRACK >

KHz,MHz, 

,1

PRESET-3

1D,1C,1B

PLAY/PAUSE

5E,5G,5F,5A

PRESET-4

2E,2G,2F,2A

OFF x

5D,5C,5B, 

 

PRESET-5

2D,2C,2B, 

RADIO/BAND

6E,6G,6F,6A

MEGABASS

DOT,COL, 

,CD

TIME ZONE

6D,6C,6B,