Technics RS-X501 - Measurement and Adjustment Preparation; Conditions, Instruments, and Adjustment Points

RS-X501
lM MEASUREMENT AND ADJUSTMENT METHODES
Measurement Condition
* Rec. level control; Maximum Make sure heads are clean
e Reverse-mode selector switch; —_~ ¢ Make sure capstan and pressure roller are clean
e Edit-recording tape-speed selector; X1 e Judgeable room temperature 20+5°C (68+9° F)
¢ Dolby NR switch; Off
Measuring instrument
© EVM (Electronic Voltmeter) ¢ ATT (Attenuator)
°
Oscilloscope
¢
DC
voltmeter
¢
Digital
frequency
counter
¢
Resistor
(600Q)
¢ AF oscillator
Test tape
¢ Head azimuth adjustment (8kHz, —20dB); QZZCFM ¢ 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
;
Q2ZZCRA
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)} nee Mging
MAI N PC.B. z = out in
PLAYBACK GAIN ADy.
DECK I: VR3(Lch) { VR4 (Reh )}
DECK’ 2: VR5{Lch) { VR6(Rch)}
a
@]
Gj
VR
901
h>
OVERALL
GAIN
ADy.
DECK
2:
VR7(Lch)
{VR8(Rch)}
TAPE SPEED ADJ.
DECK 2: VR902(X1),VR9OI (X2) ERASE CURRENT ADv. ERASE CURRENT
DECK 1: VR903(X!) DECK 2:VR3Ol ADJ. TEST POINT
(DECK 2)