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1. Radio Section
Adjustment
Item
ADJUSTMENT
Measuring Instrument and Connection
Measuring
Instrument
Input
Terminal
Output
Terminal
Genescope
or Signal
Generator
Frequency
Dial
Pointer
Position
TRK-6701W
TRK-6701W
Note:
1. Feed in a 90 MHz
(400 Hz, 30% mod.) weak signal to
TP101
from the FM signal generator.
Adjust T101 for
maximum amplitude of 400 Hz signal shown in Figure 1.
4. Connect the frequency counter to TP301, via a resistor
of 100 ka.
5. Connect AM signal generator to loop antenna, bring near
to ferrite antenna.
* FM signal
generator
(400Hz, 30%
mod.)
* Oscilloscope
-VTVM
TP101, 102
(thru FM
dummy
antenna)
(Note 3)
FM S-curve
» Genescope
(10.7 MHz)
TP103
400Hz signal
Max. amplitude
6. Feed
in a weak
signal from the genescope and confirm
4
that the waveform is obtained shown in Figure 4.
Fig. 1
Base line
| 10.7 MHz
Highest
2. Feed in a weak signal to TP103 from the genescope and
FM OSC.
(Covering)
FM ANT.
(Tracking)
* FM signal
generator
(400Hz, 30%
mod.)
* Oscilloscope
~"VTVM
TP101, 102
(thru FM
dummy
antenna)
(Note 3)
Speaker
terminal
(2.8Qload)
Lowest
L102
109 MHz
Highest
CT102
confirm that the S-curve is obtained shown
in Figure 2.
Adjust the genescope output so
Repeat steps (
1) and (2)
90 MHz
7
90 MHz
L101
+
106 MHz
106 MHz
CT 101
A
Fig. 2
Repeat steps (1) and (2)
FM MPX
(Multiplex)
+ Frequency
counter
Connect a
10 pF 25V
electrolytic
capacitor
between the
No.2 pin of
{C301 and
ground.
+ Genescope
(455 kHz)
Ferrite-core
antenna
(Note 5)
455 kHz
Highest
3. FM dummy antenna shows Figure 3.
Rg: SG's output impedance
Fig. 3
SW OSC.
(Covering)
SW ANT.
(Tracking)
- AM Signal
generator
(400Hz, 30%
mod.)
*VTVM
Ferrite
antenna
(Note 5)
Speaker
terminal
(2.8 gload)
3.15 MHz
Lowest
L153
12.5 MHz
Highest
CT153
1
2. Tape Recorder Section
Repeat steps (1) and (2)
4 MHz
L151
11 MHz
CT151
cleaning stick moisted in alcohol.
Measuring Instrument
Repeat steps ( 1) and (2)
Check
Tape
and Connection
Adjusted
Remarks
Position
Adjusted
Value
Adjustments
Measuring
Input
Output
MW OSC.
(Covering)
MW ANT.
(Tracking)
- AM signal
generator
(400Hz, 30%
mod.)
*VTVM
Ferrite-core
antenna
(Note 5)
Speaker
terminal
(2.82load)
515 kHz
Lowest
L154
1650 kHz
Highest
CT154
Instrument
Terminal
Terminal
Semivariable
resistor in
LINE
Tape speed
e@ Frequency
adjustment
3000 Hz
Playback
*
See Note 1
Repeat steps (
1) and (2)
600 kHz
600 kHz
L152
1400 kHz
1400 kHz
CT152
(3000 Hz)
Head
azimuth
Azimuth
Repeat steps ( 1) and (2)
Playback
adjusting
screw
Max.
tape (10kHz)
Note:
1. Adjust within 30 sec. after heat-running for more than 20 minutes.
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