Measurements And Adjustments - Teac AG-680 Service Manual

Am/fm stereo receiver
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| MEASUREMENTS AND ADJUSTMENTS
1.FM, AM TRACKING VOLTAGE ADJUSTMENTS
(FM, AM)
DC VOLTMETER vissccsscsssansssteseennast CONNECT TO TEST POINT TP1 and GND
NO.
Band
Frequency
| Adjust for
Adjustment
1 | FM | 87.50MHz
|
1.5V
L7
2 | AM
| 530KHz
|
IV
T101
2. AM RF ADJUSTMENT
Signal Generator.........ecccseeee Connects to the AM ANT. Coil through the loop antenna.
Adjust for the indication of VTVM of the wave form of scope to be maximum.
BAND
Step
Frequency
Adjust for
Adjustment
1
610KHz
Maximum sensitivity
T101, T104
AM
2
1510KHz
Maximum sensitivity
C127
3
Repeat steps 1 and 2 several times.
AC EVM
OSCILLOSCOPE
tented
OUTPUT
terminal
3.FM-RF ADJUSTMENT
Signal Generator... cesses
Connect to FM ANT JACK (FM IN) through the dummy.
AC EVM
oscitoscoPE
| NO. | Frequency
Adjust for
Adjustmert
1
90.10MHz
Maximum
Sensitivity
L2, L5, Le
2
Repeat step 1 several times.
OUTPUT
terminal

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