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PC-XC350
Adjustment method
Measurement instruments required for
adjustment
1.
Low frequency oscillator
This oscillator should have a capacity to output
0dB to 600
at an oscillation frequency of
50Hz-20KHz
2.
Electronic voltmeter
3.
Distorion meter
4.
Frequency counter
5.
Wow & flutter meter
6.
Test tape
TCC-112: tape speed and running unevenness (3KHz)
TCC-140: Reference level (1KHz)
TCC-182A: Head angle (8KHz), playback frequency
characteristics (1KHz) and dubbing frequency
charateristics (125Hz and 8KHz)
7.
Black tape
TYPE I : TDK-D60
8.
Torque gauge : For play and tension
FWD(CT-120m), and FF/REW(CT-F)
Measurement conditions
Power supply voltage----------AC 120V (60Hz)
Reference output----------Speaker : 0.866V/3
Reference frequency and -----1KHz, AUX : 450mV
input level
Input for confirming recording and-----CD : -10dB
playback characteristics
Measurement output terminal-----Speaker CN301
*Load resistance----------------------3
Radio Input signal
AM frequency ----------------400Hz
AM modulation-----------------30%
FM frequency -----------------1 KHz
FM frequency deviation --------22.5KHz
1 - 6
Headphone : 0.245V/32
Tuner section
Voltage applied to tuner ----- +B:DC 5.7V
VT: FM 2~5v / am 1.5~7.5v
Reference measurement ----- 26.1mV(0.866/3
output
Input positions ----- AM : Standard loop antenna
FM : TP1 (hot) and TP2 (GND)
Standard measurement position of volumett
Bass ---------------------- Off
EQ ----------------------- Flat
UP and down adjustment of volume ----- Vol : 16
Precautions for measurement
1.
Direct connect to the IF sweeper output
side and 1 UF and 22 Kohm connect to the
sweeper input side. Same as FIG. 1.
2.
The IF sweeper output level should be made as
low as possible within the adjusttable range.
3.
Since the IF sweeper is a fixed device, there is no
need to adjust this sweeper.
4.
Since a ceramic oscillator is used, there is no need
to perform and MIX adjustment.
5.
Since a fixed coil is used, there is no need to
adjust the FM tracking.
6.
The input and output earth systems are separated.
In case of simuitaneously measuring the voltage in
both of the input and output systems with an
electronic voltmeter for two channels, therefore, the
earth should be connected particularly carefully.
7.
In the case of BTL connection amp., the minus
terminal of speaker is not for earthing. Therefore, be
sure not to connect any other earth terminal to this
terminal. This system is of an BTL system.
8.
For connecting a dummy resistor when measuring
the output, use the wire with a greater code sze.
9.
Whenever any mixed tape is used, use the band
pass filter (DV-12V)
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