ST-S3000ES - Sony Audio Service Manual (repair manual). Page 3

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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  ENTER  and  BAND  together, turn ON the power.

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

Tuned

IF Frq

Sig Level

Stereo

RDS Signal

AST signal =LOW

IF COUNT OK

SI LEVELh70dB

ST signal=LOW

RDS DATA OK

OK or NG

OK or NG

OK or NG

OK or NG

OK or NG

OK or NG

OK or NG

IC251 NG, RV251 adjustments

FE101, IC251 NG, or IF count buffer amp (Q251, Q401) NG

IC221 NG, RV221 adjustments

IC301 NG, RV301 adjustments

IC801 NG

NG

Display

Items

FM RDS

AM (MW, LW)

DISPLAY

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  ENTER  and  RETURN  together, turn ON the power.
3. While continuously pressing  ENTER  and  RETURN  together, check the following.

Indication test pattern

* The indication test patterns from 2 to 5 are indicated on only even grids.

The display changes every 1 sec.

1 7F
p p p p p
p p p p p
p p p p p
p p p p p
p p p p p
p p p p p
p p p p p

2 60
π p π p π
π p π p π
π p π p π
π p π p π
π p π p π
π p π p π
π p π p π

3 7E
p p p p p
π π π π π
π π π π π
π π π π π
π π π π π
π π π π π
π π π π π

4 3D
π π π π π
π π π π π
p p p p p
π π π π π
p p p p p
π π π π π
π π π π π

5 5F
π π π π π
π π π π π
π π π π π
π π π π π
π π π π π
π π π π π
p p p p p

Microcomputer version indication (1 sec) 

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

Dot area only “5F” 

N Dot area only “3D”

N

N