FM Polar Adjustment (EE, CIS models only)Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
Connection 1:deviation according to "Connection 1".
2. Tune the set to 69 MHZ.
FM RF SSG3. Adjust the RV1702 so that the reading of frequency counter
75 1 coaxialconnected to TP1702 becomes within 31.25 kHz ? 0.05
kHz.(VCO adjustment)
4. Then record the reading of the level meter connected to TP1701set
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to "Connection 2".
6. Tune the set to 69 MHz.
FM ANTENNA terminal
(75 1)7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
Carrier frequency : 69 MHznected to TP1701 become maximum.
Output level: 1mV (60dB?) (at 75 open)Then adjust the CT1701 so that the reading of the level meter
Modulation: AUDIO 1 kHZ, 10kHz deviationconnected to TP1701 becomes maximum.(SUB CARRIER
PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes
Connection 2:14dB higher value than the level recorded in step 4.(SUB
CARRIER LEVEL Adjustment)
AF OSC
FM RF SSG
75 1 coaxial
set
Audio 31.25 kHz
external
modulationFM ANTENNA terminal
terminal(75 1)
Carrier frequency : 69 MHz
Output level: 1mV (60dB?) (at 75 open)
Modulation: AUDIO 31.25 kHZ, 10kHz deviation
(EXTERNAL MODULATION)
Adjustment Location :
EE, CIS models :
[TCB BOARD] (Component Side)
Y Abbreviation
EE: East European model
RV41
AM tuned levelRV41TM1
Adjustment
IC41
RV42
FM tuned level
FE1Adjustment
RV42
RV1701,TP1701
Sub carrier level
Adjustment
RV1701LEVEL METER
CT1701,L1701,TP1701+
Sub carrier peakL1701CT1701�
Adjustment
(FILTER) TP1701
FREQUENCY COUNTER
IC1701
TP1702+
RV1702,TP1702
(VCO)�
VCO Adjustment
RV1702
� 36 � |
ACEC
