Onkyo TA-2600 - Adjustment Procedures

TA-2600
ADJUSTMENT PROCEDURES
PRECAUTIONS
{. Before adjustment, clean the following parts with an
alchol moinstend swab.
* record/playback head * erase head
* pinch roller * capstan
2. Do not use magnetized screwdriver for adjustments.
3. Demagnetize record/playback head with a head de-
magnetizer.
' Connection of
Line input Test tape
instrument
TEST EQUIPMENT/TOOLS REQUIRED:
Audio oscillator
Digital frequency counter
Oscilloscope
Attenuator
AC voltmeter
Non-magnetic screw driver
Test tapes
VTT-658 >: 10 KHz, —i5dB
MTT-111 : 3 kHz, —10dB-
MTT-150 : Dolby level calibration
400Hz, tone 200nWb/m
| Output | Adjustment
Mode a .
indicator point
Adjust | Remarks
ae |
| Frequency
— counter to
LINE output
terminal
a ae
MTT-111
Frequency — Semi-fixed | 3,005 to
- counter on the motor 3 QIOHz
- AC voltmeter
and oscillo-
Head
. scope to VT T-658
azimuth |
| LINE output
terminal
. +e on we ee
AC voltmeter
Playback | to terminals
level TP-1 and
TP-2
MTT-150
| Maximum and
AC | Head azimuth same phase
voltmeter = screw at channels
LandR
| Fig-1
AC | R-107(Ch.L)
: voltmeter | R-108(Ch.R)
MTT-150
R-501 (Ch.L)
-333
R-502
(Ch.R)
NADIS-3339
i AC voltmeter
to terminals | METAL TAPE
TP-1 and TP-2 |
AC L-101 (Ch.L)
voltmeter
L-102
(Ch.R)
Minimum
| AC voltmeter
| to terminals
TP-3 and
TP-4
METAL TAPE:
R-467
AC L-409 (Ch.L) Maximum R-468
voltmeter L-410(Ch.R) counter
clock wise
REC
“AC voltmeter | 1kHz. —20dB
_ to LINE output | and NEW XL-II90
! terminal I2kHz, —20dB
Bias
current
R-467 (Ch.L) ' Same level Input VR
REC/PB
voltmeter
R-468
(Ch.R)
_at
REC/PB
maximum
!
dine eee nt
ee ee
Record -Fig-2 -1kHz
level
Blank tape
NORMAL ......... UD-1 C-90
HIGH ............ XL- C-90
METAL .......... MX C-90
AC Attenutor or
voltmeter | AF OSC output
AC | R-413(Ch.L) Same level
voltmeter =; R-414(Ch.R) at REC/PB
350mV
Input VR
maximum
REC/PB
PLAY torque............. 30 — 60g/cm
FF.REW torque ........... 70 — 140g/cm
Back tension ............. 2 —Sg/em