Sony ST-S3000ES, Service Manual

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1. Circuit Check Mode
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.
SECTION 2
TEST MODE
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.
2. FLUORESCENT INDICATOR TUBE Check and KEY Check 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