4
TMR-RF960R
SECTION 3
ELECTRICAL ADJUSTMENTS
Setting :
AF signal
generator
Telescopic
antenna
8 cm
L-CH (J402)
TMR-RF960R
set
TMR-RF960R
set
Frequency counter
Transmission 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
measure the frequencies of CH1, CH2 and CH3 and make
sure the values are as follows:
CH1 : 913.5 MHz
±
200 kHz
CH2 : 914.0 MHz
±
200 kHz
CH3 : 914.5 MHz
±
200 kHz
When the frequency is not satisfied the specified value, set the
channel switch (S402) to CH2, then adjust the value of the frequency
counter to 914.0 MHz by CT501 in the TX-VCO BLOCK.
Standard value :913.9MHz to 914.1MHz
When completed with replacement, recheck the frequencies of CH1,
CH2 and CH3.
Charge Current Check
1. Connect the ammmeter
3
and
#
probes to TP8 and 9.
2. The green LED (on charging) turns on.
Make sure the reading on the current meter becomes to the
standard value.
Standard value: 45
±
5mA
TP8 TP9
CURRENT METER
3
#
TX-BASE BOARD (Conductor side)
Pilot signal Modulation Check and Adjustment
1. Set the channel to CH2.
2. An electric wave is output for 5 or 10 minutes when OFF to
ON a power supply (LED (POWER) will ON).
3. Measure the center terminal of RV401 using an digital volt-
meter (AC range) and make sure the value is 2.65 to
2.75mVrms.
If the measured value is other than the specified value, adjust
to 2.65 to 2.75mVrms by turning the RV401 on the TX-BASE
board.
Connection points and Adjustment Location :
RV401
TX-VCO BLOCK
(R-CH)
(L-CH)
CHANNNEL
3CH-2CH-1CH
RV401: Modulation adjustment
CT501:Transmission
frequency adjustment
TX-BASE BOARD (Component side)
S402
S401
J402
8
3
2
1
R468
R466
C488
C455
C454
C457
R469
R460
R464
R402
C480
R405
R472
IC404
IC403
C408
D403
X401
C458
RV401
JW416
JW401
IC402
Q404
C450
1-861-437-
digtal voltmeter
(AC range)
TX-BASE BOARD (Conductor side)
