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ADJUSTMENTS
R329
R332
TP-FEOCo) _JTP-TSO
TP-VRFF
R305
Q303
TP-RF
OSCILLOSCOPE
R32
:
R332
TPH=PE0LS
2-2 Focus Balance Adjustment
(1) Connect
oscilloscope
across
TP-RF
and
TP-
VREF.
(AC range: 0.2V/0.5u sec DIV)
(2) Play back YEDS-7 test disc.
(3) Adjust
R332
(20K ohm) so that 3T component
of RF signal obtains max.
Adjust so that 3T component
of the signal obtains max.
2-3 Tracking Offset Adjustment
{in TA8101N
and R315
Variable
Resistor replace-
ment)
(1) Set unit to STOP mode with power of unit ON.
(2) Connect
oscilloscope
or tester
across
TP-TSO
(TE signal) and
TP-VREF.
(DC
range:
5mV/
DIV)
(3) Adjust R315 (100K ohm) so that DC offset ob-
tains OV +10mV.
2-4 Tracking Error Balance Adjustment
(1) Connect oscilloscope across TP-TSO
(TE signal)
and TP-VREF,
(DC range: 0.5V/S5msec DIV)
(2) Play back YEDS-7 test disc.
(3) Short circuit Open
Limit
and Close
Limit leaf
switch $102.
Push PLAY
key again, and micro-
computer
will be set to test mode and tracking
error signal will be obtained.
(5) Adjust R305
(100K
ohm) so that DC offset of
tracking error signal obtains OV.
$102
Short circuit at
3 points.
2-5 Analog Output Offset Adjustment
The
adjustment
below is not necessary
when
pickup
is replaced.
(1) Turn power of unit ON.
(2) Conect
DC voltmeter
or oscilloscope
to pin 1
(L ch), pin 7 (R ch) of Q511 on Main P.C. Board
and GND terminal of unit.
Adjust semi-fixed resistor R545 50K ohm (L ch)
and R546 50K ohm (R ch) so that DC range off-
set obtains 0 +10mV.
OSCILLOSCOPE
TP+T90
TP-VRFF
R305
Q303
R315
Adjust so that both
levels are equal.
15
2-6 CDR Adjustment
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