Onkyo TA-2058

ADJUSTMENT PROCEDURES
Connection | Line input Test tape Mode Output Adj ustment
of instrument | indicator point
Frequency
counter to Frequency Semi-fixed 3,010 to
LINE output MTT-111 PB counter on the motor | 3,020Hz
terminal
| ———|- |
AC voltmeter
and oscillo- Maximum and
Head scope to VTT-658 PB AC Head azimuth | same phase Fig. 1
azimuth voltmeter screw at channels
LINE output LandR
terminal an
po
AC voltmeter
Playback | to terminals AC R-123 (Ch.L)
3 level TP-1 and MYT-150 PB voltmeter R-124 (Ch.R) 300mV
TP-2
nd ——
1kHz, —20dB
Bias . , AC R-569 (Ch.L) | Same level Input VR
4 Fig. 2 and NEW XL-II90 | REC/PB ,
current 12kHz, —204B voltmeter R-570 (Ch.R) | at REC/PB maximum
~+—- | —-
Attenuator or accu VR
REC AC AF OSC 350mV center
Record PAUSE voltmeter output position
level Fig. 2 1KHz
AC R-401 (Ch.L) | Same level
| | REC/PB | voltmeter | R-402(ChR) | at REC/PB
I +
ACCU BIAS oscillator adjustment
1. Connect the oscilloscope and AC votmeter to the terminal
TP-3.
2. Pull P605 socket out of P605 plug on NACOC-2673. a Asi aly rat 400Hz
3. Connect +5V terminal to the kathode of D-618 with short-crip. b y NX 12kHz
4. Adjust the semi-fixed resistor R-531 so that the 400Hz and
12kHz mixing signals become same level (a=b) as shown yA
below.
5. Adjust R-532 so that the AC voltmeter indicator becomes
20mV.
OSCILLOSCOPE
AF OSC Attenuator LINE tN LINE VTVM
OUT
0° (IN PHASE) 45° fig-2
Confirming phase relationship
fig- 1
PLAY torque ............... 30 ~ 60 g/cm Back tention.................. 4~ 7 g/cm
FF. REW torque ............. 70 ~ 140 g/cm