Adjustment Method - JVC MX-K10/30 Service Manual

Adjustment method

Measurement instruments required
for adjustment
1. Low frequency oscillator,
This oscillator should have a capacity to output 0dB
to 600ohm at an oscillation frequency of 50Hz-
20kHz.
2. Attenuator impedance : 600ohm
3. Electronic voltmeter
4. Frequency counter
5. Wow flutter meter
6. Test tape
VT712 : For Tape speed and wow flutter ( 3kHz)
VT703 : For Head angle(10kHz),Play back frequency
characteristics(1kHz), and dubbing fre-
quency characteristics (63,1,10kHz)
7. Blank tape
TAPE I : AC-225
8. Torque gauge : For play and back tension forward ;
TW2111A, Reverse ; TW2121A Fast Forward and
Rewind ; TW2231A
9. Test disc: CTS-1000(12cm),GRG-1211(8cm)
10. Jitter meter
Measurement conditions
(Select correct AC Line Volt.)
Power supply voltage
AC110/127/220/230-240V (50/60Hz) US/UX
Measurement
output terminal : Speaker out
: TP101(Measuring for TUNER/
: Dummy load 6ohm
1-18
DECK/CD)
Radio input signal
AM modulation frequency : 400Hz
Modulation factor : 30%
FM modulation frequency : 400Hz
Frequency displacement : 22.5kHz
Frequency Range
AM 531kHz~1710kHz
FM 87.5MHz~108MHz
Standard measurement positions of
volume and switch
Power: Sta ndby (Light ST A NDBY Indicator)
S, A, BASS : OFF
Sound mode : OFF
Main VOL. : 0 Minimum
Travers mecha set position : Disc 1
Mic MIX VOL : MAX
ECHO : OFF
Precautions f or measure ment
1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082