Technics RS-BX606 - Measurement and Adjustment Methods; Test Tape Specifications and Setup

| RS-BX60¢
Mi MEASUREMENT AND ADJUSTMENT METHODS
Measurement Condition
¢ Rec. level control; Maximum © Dolby NR switch; Off
«Timer switch; Off ¢ Make sure heads are clean
*
MPX
filter
switch:
off
¢
Make
sure
capstan
and
pressure
roller
are
clean
*
Bias-adjustment
VR:
Center
¢
Judgeable
room
temperature
20+5°C (68+9°
F)
Measuring instrument
¢ EVM (Electronic Voltmeter) © ATT (Attenuator)
* Oscilloscope * Resistor (6000)
¢ Digital frequency counter
© AF oscillator
Test tape
¢ Head azimuth adjustment (8kHz, —20dB); QZZCFM ¢ Playback gain adjustment (315Hz, 0dB); QZ2ZCFM
¢Tape speed adjustment (3kHz, — 10dB); QZZCWAT ¢ Overall frequency response, Overall gain adjustment
¢ Playback frequency response (315Hz, 12.5kHz, 10kHz, Normal reference blank tape ; QZZCRA
8kHz,
4kHz,
1kHz,
250Hz,
125Hz,
63Hz,
—20dB);
CrO,
reference
blank
tape;
QZZCRX
QZZCFM
Metal
reference
blank
tape;
QZZCRZ
e Adjustment Points
Line Line
MAIN
PC.B.
out
in
HX PRO ADJ.
RESPONSE ADJ.
VR 301 Lch)VR302 (Reh)
PLAYBACK GAIN ADJ.
VR3(Lch), VR4 (Reh)
VR302. L302 ole
cS : VR3 VR4
vez0ig A301 & VR5
OVERALL GAIN ADu.
Cc VR5(Lch), VR6(Rch)
© LI VR6
>|
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AC BIAS TRAP ADJ.
Li(teh), L2(Reh)