Technics RS-X101 - Measurement and Adjustment Methods (English); Test Tape and Measurement Conditions; Adjustment Points Overview

RS-X101
M@ MEASUREMENT AND ADJUSTMENT METHODES
Measurement Condition
¢ Rec, level control; Maximum ¢ Dolby NR switch; Off
¢ Reverse-mode selector switch; —— e Make sure heads are clean
¢ Edit-recording tape-speed selector; X1 ¢ Make sure capstan and pressure roller are clean
¢ Judgeable room temperature 20+5°C (68+9°F)
Measuring instrument
¢
EVM
(Electronic
Voltmeter)
¢
ATT
(Attenuator)
¢
Oscilloscope
¢
DC
voltmeter
©
Digital
frequency
counter
e
Resistor
(600Q)
e AF oscillator
Test tape
¢ Head azimuth adjustment (8kHz, —20dB); QZZCFM e Playback gain adjustment (315Hz, 0dB); QZZCFM
¢ Tape speed adjustment (3kHz, —10dB); QZZCWAT * Overall frequency response, Overall gain adjustment
e 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
¢ Adjustment Points
MODE TEST POINT OVERALL FREQUENCY RESPONSE
(Soldered Surface) DECK 2: VR303(Lch) {VR302 (Rch)
Line Line
out in
MAIN P.C.B.
“a — 4
(EG) area only] PLAYBACK GAIN ADJ.
DECK 1: VR3(Lch) {VR4 (Rch)}
DECK 2: VR5 (Lch) {VR6 (Rch)}
~
Ic901 vR6 [9 [@} |] [@] vr3
VR4 VR5
VR301
VR303
VR902 (@] vR302 s
Bliss
aae
vrs
WR90S: 7 i) no TP3 ) > OVERALL GAIN ADJ.
VR7 DECK 2: VR7 (Lch) {VR8 (Rch)}
TAPE SPEED ADU. TP3
DECK 1: VR902(X1), VR901(X2) ERASECURRENTADJ. ERASE CURRENT
DECK 2: VR903 (X1) DECK 2: VR301 ADJ. TEST POINT