ONKYO K505TX
Manual de Servicio

K-505TX

ADJUSTMENT PROCEDURES
PRECAUTIONS 1. Before adjustment, clean the following parts with an alcohol moistened swab. *recording/playback head *pinch roller *capstan *erase head TEST EQUIPMENT/TOOL REQUIRED Audio Oscillator Digital frequency counter Oscilloscope Attenuator AC voltmeter Non-magnetic screwdriver Test tapes TCC-153 MTT-111N MTT-150 :10kHz, -15dB :3kHz,-10dB :Dolby level calibration 400Hz, tone 200nWb/m

2. Do not use magnetized screwdriver for adjustment. 3. Demagnetize recording/playback head with a head demagnetizer.

Item

Connection of instrument Frequency

Line output level/freq.

Test tape

Mode

Output indicator

Adjustme nt point

Adjustment

Remarks

1

Tape speed

counter to P205 or LINE OUT terminal. AC voltmeter

MTT111N

PB

Frequency counter

R716

3010Hz

Maximum level TCC-153 PB AC voltmeter Fig.1 & same phase at channels L &R R115 Refer to Fig.2.

2

Head azimuth

& oscilloscope to P205

3

Playback level

AC voltmeter to P205

MTT150

PB

AC voltmeter

(L ch.) R116 (R ch.)

300mV

Frequency 4 Bias frequency counter to lead wire of erase head Auto Rec 5 adjustment Normal tape Push a auto-adjust button(S717) Normal tape REC Frequency counter L403 85kHz

REC/PB

Auto(S717)

Blank tapes Normal High Metal UDUDC-90 C-90 PLAY torque �����..30 70g/cm (Use the test tape TW-2231.)

FF/REW torque �����.. 180g/cm (Use the test tape TW-2111.) 80 Back tension �����.. 2 6g/cm (Use the test tape TW-2111.)

XS C-60