ST-SE570 - Sony Audio Service Manual (repair manual). Page 6

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NOTE : The preset data will be erased when this test mode is used. Therefore, take down the data before setting this mode and preset the data

again after completing operations in this mode.

1. Turn OFF the power.
2. While pressing 1 and  AUTO-BETICAL SELECT  together, turn ON  POWER .
3. While continuously pressing 1 and  AUTO-BETICAL SELECT  together, check the following.

Indication test pattern

The display changes every 1 sec.

4. Release 1 and  AUTO-BETICAL SELECT  . The KEY CHECK mode will be set.

5. All key numbers will be displayed.

Key Number : 25

6. Each time the key is pressed, the key number will be counted down.

Each key will be counted only once, at the first time.

7. When all keys have been pressed, the process will end.

NOTE : As contents of the Factory Preset will be written into memory after completing this check mode, delete contents of memory

according to 4. Forced RESET.

Set to the reception frequency that the circuit can STEREO RDS stations. (Set the input level to above 70 dB.)
This enables circuit check to be performed in any of the reception modes-FM, AM (MW, LW). Set to a desired band before setting the test
mode.

1. Turn OFF the power.
2. While pressing 4 and  AUTO-BETICAL SELECT  together, turn ON  POWER .

• The items in the following table will be checked automatically in order every 2 seconds.

FM RDS

Display

Items

Tuned

IF Frq

Sig Level

Stereo

RDS Signal

AST signal =LOW

IF COUNT OK

SI LEVELh70dB

ST signal=LOW

RDS DATA OK

DISPLAY

OK or NG

OK or NG

OK or NG

OK or NG

OK or NG

AM (MW, LW)

OK or NG

OK or NG

NG

IC201 NG, RV201 adjustments

TB101, IC201 NG

TB101 NG

TB101 NG

IC801 NG

Microcomputer version indication (1 sec) 

t All light up “7F” t Dot area only “60” t Dot area only “7E”

Dot area only “5F” 

T Dot area only “3D”

T

T

1

 7F

2

 60

3

 7E

4

 3D

5

 5F