– 4 –
TUNER SECTION
Note 1 :
The adjustment should be performed in the publication.
(AM
n
FM)
Note 2 :
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
AM Section Adjustment
Setting :
set
loop antenna A
loop antenna B
60cm
AM RF signal
generator
Carrier frequency : 1,050kHz (US, Canadian)
999kHz (EXCEPT US, Canadian)
Modulation : 400Hz, 30% modulation
FM Section Adjustment
Setting :
set
FM ANTENNA terminal (TM1)
75
Ω
coaxial
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : 1kHz, 75kHz deviation
AM Tuned Indication Lighting Level Adjustment
Band : AM
Procedure :
1. Set loop antenna A so that the loop antenna B input level becomes
316.2
µ
V (50dB
µ
)
2. Tune the set to 1,050kHz (US, Canadian) or 999kHz (EXCEPT
US, Canadian).
3. Adjust RV41 so that the TUNED light up.
4. Confirm that the TUNED light off with AM RF signal generator
output level set at 251.2
µ
V (48dB
µ
)
5. Confirm the FM tuned indication lighting level and adjust if nec-
essary.
Adjustment Location : TUNER board
SECTION 2
ADJUSTMENTS
FM Tuned Indication Lighting Level Adjustment
Band : FM
Procedure :
1. Supply a 31.6
µ
V (30dB
µ
) 98 MHz signal to the ANTENNA ter-
minal (TM1).
2. Tune the set to 98MHz.
3. Adjust RV42 so that the TUNED light up.
4. Confirm that the TUNED light off with FM RF signal generator
output level set at 25.1
µ
V (28dB
µ
).
Adjustment Location : TUNER board
RV41 : AM Tuned Level
RV42 : FM Tuned Level
[ TUNER BOARD ]
– Component side –
