MX-K3R
Adjustment method
Measurement instruments required
for adjustment
1. Low frequency oscillator,Radio input signal
This oscillator should have a capacity to output 0dB AM modulation frequency : 400Hz
to 600ohm at an oscillation frequency of 50Hz-20kHz.Modulation factor : 30%
2. Attenuator impedance : 600ohmFM modulation frequency : 400Hz
3. Electronic voltmeterFrequency displacement : 22.5kHz
4. Frequency counter
5. Wow flutter meter Frequency Range
6. Test tapeFM87.5MHz~108MHz
VT712 : For Tape speed and wow flutter ( 3kHz)MW522kHz~1629kHz
LW144kHz~228kHz
VT703 : For Head angle(10kHz),Play back frequency
characteristics(1kHz),and dubbing frequency
characteristics(63,1,10kHz)Standard measurement positions of volume
7. Blank tapeand switch
TAPE : AC-225, TAPE : AC-514Power : Standby (Light STANDBY Indicator)
8. Torque gauge : For play and back tensionS,A,BASS : OFF
Forward ; TW2111A, Reverse ; TW2121ASound mode : OFF
Fast Forward and Rewind ; TW2231AMain VOL. : 0 Minimum
9. Test disc
: CTS-1000(12cm),GRG-1211(8cm)Traverse mecha set position : Disc 1
10. Jitter meter
Precautions for measurement
1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082 F and 100kohm in series to
the sweeper input side.
2. The IF sweeper output level should be made as
low as possible within the adjustable range.
3. Since the IF sweeper is a fixed device, there is
Measurement conditions no need to adjust this sweeper.
Power supply voltage 4. Since a ceramic oscillator is used, there is no need
AC230V (50Hz) to perform any MPX 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.
Measurement In case of simultaneously measuring the voltage
output terminal : Speaker out in both of the input and output systems with an
: TP101(Measuring for TUNER/DECK/CD) electronic voltmeter for two channels, therefore,
: Dummy load 6ohm the earth should be connected particularly.
7. In the case of BTL connection amplifier, 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 OTL system.
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ACEC
JVC
