Sony TMR-RF845R Panduan Servis - Halaman 4
Jelajahi secara online atau unduh pdf Panduan Servis untuk Sistem stereo Sony TMR-RF845R. Sony TMR-RF845R 11 halaman. Wireless stereo headphone sysytem
Juga untuk Sony TMR-RF845R: Panduan Servis (2 halaman)
Halaman Cetak
QQ
3 7 63 1515 0
Setting :
AF signal
generator
Telescopic
antenna
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:
TE
CH1 : 863.5 MHz ± 40 kHz
L 13942296513
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.
www
.
http://www.xiaoyu163.com
SECTION 3
ELECTRICAL ADJUSTMENTS
set
TMR-RF875R
L-CH (J402)
set
8 cm
TMR-RF875R
x
ao
u163
y
i
— 4 —
http://www.xiaoyu163.com
2 9
8
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
(L-CH) (R-CH)
S402
RV403
VCO UNIT
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
J402
0 5
8
2 9
9 4
2 8
m
9 9
9 9