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@ Main Adjustment: Tuner Sections
Item
| PC-W150 B/E/G/GI
Measuring Conditions and Main Adjustments
FM IF
adjustment
|__|
MW
tracking
adjustment
< Conditions >
1. Radio band : FM
2. Variable
position
: Near the minimum
capacity position
where no signal comes in.
3. Volume : minimum
4. Signal input : positive side to TP5
5. Measuring point : Positive side to TP6
Negative side to TP7
< Adjustment >
1. Adjust T1 so that ''S'' ourve on the scope may obtained
maximum
and balanced wave form as shown (Fig. 8-4).
2. On the FM IF circuit, in case where IF filter and discriminator
was used solid units, there is unnecessary for IF tuning and
that IF character
depend
upon
the ceramic
filter unit.
Ceramic filter unit has been color marked on the body, it
was expressed their center frequency.
Classification of ceramic filter.
Blue
: 10.67 +0.03 MHz
Red
: 10.70 0.03 MHz
Orange : 10.73 +0.03 MHz
<Conditions >
1. Radio band : AM
2. Signal input : Standard loop antenna
3. Input frequency : 520 kHz, 1650 kHz (PC-W150 B/E/G)
516 kHz, 1632 kHz (PC-W150 Gi)
600 kHz, 1400 kHz
<Adjustment >
1. Receive
520 kHz
(or
capacitor position.
2. Adjust L5 so that output level becomes maximum.
3. Receive
1650 kHz
(1632 kHz)
at
minimum
variable
Capacitor position.
. Adjust TC5 so that output level becomes maximum.
. Repeat the above step 1, 2 through 3, 4.
. Receive 600 kHz and adjust L6 so that output level becomes
maximum.
7. Receive
1400 kHz and adjust TC6 so that output level
becomes maximum.
8. Repeat the above step 6. through 7. so that output becomes
maximum.
516 kHz)
at
maximum
variable
aa
ss
LW
tracking
adjustment
<Conditions >
1. Radio band : LW
2. Signal input : Standard loop antenna
3. Input frequency : 145 kHz, 360 kHz
138 kHz, 293 kHz (PC-W150 Gl)
145 kHz, 360 kHz (PC-W150 B/E/G)
145 kHz, 290 kHz (PC-W150 G)
< Adjustment >
. Receive 145 kHz at maximum variable capacitor position.
. Adjust L3 so that output level becomes maximum.
. Receive 360 kHz at minimum variable capacitor position.
. Adjust TC3 so that output level becomes maximum.
. Repeat the above step 1, 2 through 3, 4.
. Receive 145 kHz and adjsut L4 so that output level becomes
maximum.
Oahwn
—
Maximum
wave
Fig. 8-4
Input frequency
: 520 kHz
(or 516 kHz)
maximum
Input frequency
: 1650 kHz
maximum
Input frequency
: 600 kHz
maximum
Input frequency
: 1400 kHz
maximum
Input frequency
: 145 kHz
maximum
Input frequency
: 360 kHz
maximum
Input frequency
: 145 kHz
maximum
Standard Value
{or
1632 kHz)
Adjusting Point
T1
L5
TC5
L6
TC6
L3
TC3
L4
(No.
1785)
15
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