Adjustment Method; Measuring Instructions Required For Adjustment; Measuring Instruments; Measurement Conditions - JVC RC-BX30 Service Manual

RC-BX30

Adjustment method

Measuring instructions required for
adjustment
1. AM signal generator
2. FM signal generator
3. Inter mediate frequency sweep generator
4. FM stereo signal generator
5. Low-frequency oscillator
(oscillation frequency 50Hz-20kHz, 0dB output
with 600 ohm impedance)
6. Attenuator (600 ohm impedance)
7. Electronic voltmeter
8. Distortion meter
9. Torque gauge (cassette for CTG-N)
10. Wow & flutter meter
11. Frequency counter meter
12. Test tape
VT712 : For tape speed and wow flutter
VT724 : For reference level
VT702 : For playback frequency
VT702 : For head azimuth adjustment
13. Blank tape
TAPE : AC-225

Measurement conditions

Power supply voltage
AC110V-127V/210V-230V (60Hz/50Hz)
1-14

Measuring instruments

Radio section
FM 1kHz, 22.5kHz deviation
FM STEREO : 1kHz, 67.5kHz deviation
pilot signal 7.5kHz
AM : 1kHz, 30% modulation
Reference output :
Speaker output 0dBs (0.447V)/4 ohm
H.phone output -10dBs (0.245V)/32 ohm
Standard position of function switch :
Selects FM in tuner mode
Bass boost: OFF
Main volume: Reference output
Amplifier section
Reference output :
Speaker output 0dBs (0.447V)/4 ohm
H.phone output -10dBs (0.245V)/32 ohm
Standard position of function switch :
Selects TAPE mode
CD section
CD test disc : CTS-1000