Teac PD-135 - Page 11

ADJUSTMENT PROCEDURES ccontinuea)
22K
TE
: 22K
DC ©
Voltmeter
220/16 DC Voltmeter
ms and
GND me Oscilloscope
220/16
GND
Oscilloscope
3. Turn on the power and play back the first selection on test
disk YEDS4.
4. Readjust the height of the turntable if the reading on the DC
CONFIRMING JITTER voltmeter is not in the range of 0V+0.35V. (Increase: the
This procedure can be omitted in the case that no jitter counter is height of the turntable when the voltmeter reading is positive,
equipped. and decrease it when negative.)
1. As same in the adjustment of the pickup angle, play the fourth
tune of the YEDS4.
2. Connecting the jitter counter to the test point EFM, make
sure that the value of 3T is less than 25nSec. ADJUSTMENT OF FOCUS/TRACKING GAIN
The measurement circuit shown below is necessary for accurate
3. In the case of 25nSec or more, adjust again the Pick-up Angle adjustement of the focus and tracking gain. If this circuit cannot
and adjust P102. be made, make adjustments using the simplified procedure.
ADJUSTMENT OF TURNTABLE HEIGHT Simp lededlustment procedure
Thi : de'when th : ides @ Focus gain adjustment
is
adjustment
must
be
made
when
the
motor
is
replaced.
P103
is
set
to
a
position
30°
from
its
mechanical
center
as
shown in the diagram below.
30°
LLLLCLELLLALUUSLELLLLLELLLLLSLELLLLLUILLLELELEL EET LTTLLLEET TTT e@ Tracking gain adjustment
: P104 is set to a position 30° from its mechanical center as
shown in the diagram below.
2. Connect test pin FC to a DC voltmeter and oscilloscope
through the low-pass filter.
30°
-19-
1. Attach the turntable so that its top surface is 22.75mm from
the top of the chassis.
22.75mm