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PC-Y777 B/E/G
|
Main Adjustments
@
Equipment and Measuring Instrument used for Adjustments
Electronic voltmeter
Audio frequency oscillator
Attenuator
Wow-flutter meter
Frequency counter
BH Condition for Measurement
Power Supply
......
AC 240 V (50 Hz): PC-Y777 B
AC 220 V (50 Hz): PC-Y777 E/G
DC 12 V: PC-Y777 B/E/G
Reference output .. Speaker
: 0 dBs (0.55 V)/6 Q
Headphone:
— 13 dBs (0.173 V)/32 Q
Reference input.....
Ext. MIC
: —46 dBs
H@ Condition for Measurement
: Tuner Section
Applied voltage of the Tuner : DC 5.8 V
Reference output : Speaker ; 50 mW
(0.55 V)/6 Q
Input signal : (AM) Modulation frequency; 400 Hz, 30%
(FM) Modulation frequency; 400 Hz
22.5 kHz dev.
Set position of Volume and Switch : SEA; VOLUME; Center
Dummy
antenna for short wave.
Lod length
'cm
L>90
902=L2=60
L<60
C1 (PE)
10
8
6
R1+R2=802
R1 : Output impedance of SSG.
Fig. 8-1
@ Preset Memory
(Initialize)
Standard signal generator
Torque testing cassette gauge CTG-N
Alignment tape
Measuring tape: TS-12
(UR)
VTT702
(8 kHz)
Function position .. TAPE/FM
MODE:
TAPE NORMAL
FUNCTION
: NORMAL
SPEED
SEA
: Center
VOLUME
: Center
BEAT CUT
: NORMAL
Attentive point
Connection of IF sweeper:
Connect a 30 pF capacitor and a 33 kQ resistor in series
to the sweeper's output while 0.082 pF capacitor and
a 100 kQ resistor in parallel to the input.
IF sweeper's output level:
Set as minimum as enough for adjustment.
FM MPX adjustment:
For this adjustment, connect a 100 kQ resistor in series
to a frequency counter's input.
Loop Antenna
AM SSG
LOOP ANTENNA
60cm
'
Fig. 8-2
BAR ANT.
BAND
M1
M2
|
M3
M4
|
M5
AM (kHz)
530
600
1000
1500
|
530
FM (MHz)
87.5
88
|
98
106
|
87.5
12 (No. 1802)
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