Onkyo TA-2130 - Adjustment Procedures

TA-2130
ADJUSTMENT PROCEDURES
PRECAUTIONS
1. Before adjustment, clean the following parts with an
alchol moinstend swab,
* record/playback head
* pinch roller
* erase head
* capstan
2. Do not use magnetized screwdriver for adjustments.
3. Demagnetize record/playback head with a head de-
magnetizer.
TEST EQUIPMENT/TOOLS REQUIRED:
Audio oscillator
Digital frequency counter
Connection of Lo
Item . Line input
instrument
Test tape
AC voltmeter
and oscillo-
scope to
LINE output
terminal
VTT-658
AC voltmeter
to terminals
TP-1 and
TP-2
MTT-150
) Head
azimuth
Playback
3
level
Frequency
counter to
P401. E head
read (loose
coupling)
METAL TAPE| REC
AC voltmeter
to LINE output
terminal
1kHz, —20dB
and
12kHz, —20dB
Bias
NEW XL-1190
current
REC
Frequency
counter to
TP-5
10: 1 cabie
Clock
—_
~ a)
N
VTVM
Attenuator
LINE IN
fig- 1
REC/PB
PAUSE
REC/PB
Oscilloscope
Attenuator
AC voltmeter
Non-magnetic screw driver
Blank tapes (completely erased)
NORMAL .................. NEW UD90
HIGH... 0... eee NEW XL-II90
METAL ..............0044. NEW MX60
Test tapes
VTT-658 10 KHz, —15dB
MTT-111 3 kHz, —10dB
MTT-150 Dolby level calibration
400Hz, tone 200nWb/m
indicator point
Frequency
Tape counter to MTT-111 Frequency | Semi-fixed 3,010 to
speed LINE output counter onthe motor | 3,020Hz
terminal
Maximum and
same phase
at channels
Head azimuth
SCrew
AC
voltmeter
AC
voltmeter
Frequency
counter
AC
voltmeter
AC
voltmeter
R-115(Ch.L)
R-116(Ch.R)
L-405 85kHz
R-471(Ch.L)
R-472(Ch. R)
Same level
at REC/PB
Input VR
maximum
Attenutor of
AF OSC output
Input VR
AC R-401(Ch.L) | Same level maximum
voltmeter R-402(Ch.R) |at REC/PB
Frequency
counter
160 to