Sony MDR-RF815R Service Manual page 16

Setting :
AF signal
generator
Frequency counter
Send Frequency Check
1. Set the noise filter SW to OFF.
2. Input a signal of 1 kHz 40 mVrms to only the L-CH (J402).
3. Connect a telescopic antenna to the frequency counter input
and extend the antenna to a length of approximately 8 cm.
4. Place TX-BASE board close to the frequency counter, then mea-
sure the frequencies of CH1, CH2 and CH3 and make sure the
values are as follows:
CH1 : 863.5 MHz ± 40 kHz
CH2 : 864.0 MHz ± 40 kHz
CH3 : 864.5 MHz ± 40 kHz
When the frequency is not satisfied the specified value, exchange
vco unit. When completed with replacement, recheck the
frequecies of CH1, CH2 and CH3.
SECTION 3
ELECTRICAL ADJUSTMENTS
set
TMR-RF815R
L-CH (J402)
Telescopic
antenna
set
8 cm
TMR-RF815R
Pilot signal Modulation Check and Adjustment
1. Set the channel to CH2.
2. No signal input (The operating time in this case is limited to 4
or 5 minutes.)
3. Measure the movable terminal of RV403 using an digital volt-
meter (AC range) and make sure the value is 1.6mVrms ± 0.1mV.
If the measured value is other than the specified value, adjust to
1.6mVrms ± 0.1mV by turning the RV403 on the TX-BASE
board.
Connection points and Adjustment Location :
[TK-BASE BOARD] (Component side)
CH3 ← CH2 ← CH1
S402
RV403
— 4 —
(L-CH) (R-CH)
J402
VCO UNIT