Onkyo TA-6210 - Adjustment Procedures; Adjustment Precautions; Required Test Equipment and Tools; Tape Speed Adjustment

TA-6210
ADJUSTMENT PROCEDURES
PRECAUTION TEST EQUIPMENT/TOOL REQUIRED
1. Before adjustment, clean the following parts Audio oscillator
with an alchol moistend swab. Digital frequency counter
*record/playback head *erase head Oscilloscope
*pinch roller *capstan Attenuater
2. Do not use magnetized screwdriver for AC voltmeter
adjustment. Non-magnetic screwdriver
3. Demagnetized record/playback head with Test tapes
a liead demagnetizer. TCC-153 : 10kHz, -15dB
MTT-111N_ : 3kHz, -10dB
MTT-150 — : Dolby level calibration
400Hz, tone 200nWb/m
Connection of | Line output Output
Item Test tape Adjustment point Adjustment Remarks
instrument freq/ievel indicator
Frequency counter Screw on back
Frequency
to LINE output MTT-111N counter side of Capstan 3,000Hz+10Hz
terminals motor
AC voltmeter and Maximum level
A
TCC-153 c Fig.1
oscilloscope to & same phase at
LINE output
terminals
channels
Land R
AC voltmeter to
AC
voltmeter
Playback
level
R117 (L.ch)
-150
MTT-15 R118 (R.ch)
terminals TP-1
P105
Frequency counter NONE or Freauen FT mode will be
to P401 lead- Wire METAL | STOP oa - L407 107kHz+ 1kHz jalive when J147 is
n
loose coupling TAPE connected to GND.
1kHz & FT mode will be
10kH NORMAL | REC/ AC R461 (L.ch) O~+1.0dB at i hen 3147 i
current ; TAPE PB j voltmeter R462 (R.ch) 1kHz and 10kHz ane wane 8
23dB 35mV connected to GND.
FT mode will be
Recording NORMAL |REC/ | AC .
1kHz 350mV
level TAPE PB | voltmeter
Same level at
REC/PB
R403 (L.ch)
R404 (R.ch)
alive when J147 is
connected to GND.
Blank tapes
NORMAL #*eUD-1 C-90 PLAY torqueeess**30 ~ 70g/cm
HIGHeeeeeeXL-II C-90 FF.REW torque****80 ~ 180g/cm
METAL#ee*XS C-90 Back tensions*esee6 ~ 12g/cm
Head azimuth screw Don't touch these screws.
Fig.1 R/P Head