Technics SL-PJ27 - Page 15

SL-PJ27
(9) CHECK OF PLAY OPERATION AFTER ADJUSTMENT
*
Checking
Skip
Search
*
Checking
Using
Defect
Disc
1.
Play
an
ordinary
musical
program
disc.
1.
Play
the
0.7
mm
black
dot
and
the
0.7
mm
wedge
on
the
2.
Press
the
skip
button
to
check
for
normal
skip
search
defect
test
disc
(SZZP1054C)
and
verify
that
no
sound
operation
(in
both
the
forward
and
reverse
directions).
skip
or noise
occurs.
*
Checking
Manual
Search
2.
Play
the
middle
tracks
of
the
uneven
test
disc
and
verify
1.
Play
an
ordinary
musical
program
disc.
that
no
sound
skip
or
noise
occurs.
2. Press the manual search button to check for smooth
manual search operations at either low or high speed
(in both the forward and reverse directions).
¢ Connection of servo gain adjuster
Audio-frequency oscillator
©000
Servo gain adjuster
(SZZP1017F ) GNO OSC
@ ON/OFF switch @
Oscillator connection Conversion connector
terminals
(SZZP1032F
)
COON GNO ©
Selector }
) F osc ©
22
TP3TP2 3
on TPA
Oscilloscope Oscilloscope
connection
Vara
roo terminals
O~ 0} Tp2 TP3 TPI
ee 4
es G |CH1
—10.3V Ggno +10.4V
® Chassis ©
(Main) (Ground) (Main)
¢ Main P.C.B.
CN11A
D16 (Cathode)
+10.4V
cn118 \ @ Connect the red
lead wire of servo
gain adjuster.
D17 (Anode) —10.3V
© Connect the blue
lead wire of servo
gain adjuster.
Wi NEW SERVO GAIN ADJUSTER (Servo Amp. Adjusting Fixture)
The
following
introduces
the
improved
version
of
the
current
servo
gain
adjuster
(SZZP1017F):
Part number:
SZZP1094C-1
Features:
(1)
Contains
all
oscillation
frequencies
and
output
adjustments
needed
for
focus
servo
gain,
tracking
servo
gain,
and
tracking
balance adjustment
(requires
no
external
oscillator).
(2) Panel indicators indicate the best points of focus and tracking servo gains (no oscilloscope needed).
(3) Internal power supply eliminates the need for power supply from the CD player.