Sony STR-D2010 - Page 16

STR-D2010 |
e Auto Stop Level Adjustment
Setting :
FM RF stereo
signal
generator VIVM
FM ANTENNA 3000,
terminal
REC OUT
Carrier frequency : 98MHz
Output level: 40dBu or 45dBy
Procedure:
1. Turn the High/Low select switch to High.
2. Adjust RV25 so that the TUNED LED goes on.
AM SECTION
¢ AM Meter Adjustment
Setting :
‘AM RF AM LOOP ANTENNA
signal generator
Put the lead-wire (
antenna close to
Wt the set. LA =|
(ES JL
AM antenna
30% amplitude
terminal
modulation by
400Hz signal
Procedure:
1. Tune the set to 1,050kHz.
2. Adjust the RV22 so that the TUNED LED goes on.
Adjustment Location: tuner board
FM
DISCRIMINATOR
ADJ
pene Mi noon
T22, T21, TPd
RV21
FM STEREO
SEPARATION
ADJ
RV22 RV24 RV25
AM
TUNING
FM
TUNING
AUTO
STOP
LEVEL
ADJ
LEVEL
ADJ
LEVEL
ADJ
AMP SECTION
DC Bias Adjustment
@ Perform this adjustment after replacement of power amp
or drive circuit transistors.
Setting :
VOLUME: 0
SPEAKERS: OFF (no load)
Procedures :
1. Connect the digital voltmeter to Bias Test Point (TP-701
@, @ L-CH, TP-701 ©, © R-CH)
2. Increase the AC power voltage gradually to 120V confir-
ming that the voltmeter will not indicate an abnormal
value.
3. Confirm that the display is normal.
4. Adjust RT701 (L-ch) or RT751 (R-ch) so that the reading
on the voltmeter becomes 0.1mV within 30 seconds after
the power turned on.
Note :It is normal that the voltage will increase as time
passes.
5. Turn the power off and remove the digital voltmeter.
Adjustment Location: main board