Technics SL-P200

CHECK
OF
PLAY
OPERATION
AFTER
ADJUSTMENT
Checking Skip Search
.
Play
an
ordinary
musical
program
disc.
.
Press
the
skip
button
to
check
for
normal
skip
search
operation
(in
both
the
forward
and
reverse
directions).
Checking Manual Search
. Play an ordinary musical program disc.
.
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
Servo gain adjuster
(SZZP1017F )
@ON/OFF switch
ON
Selector
Oscillator connection
terminals
Oscilloscope
°o
Oscilloscope
connection
terminals
O~O}| TP2 TP3 TI
CHI
G |CH1
-12V. GND +12V
® Chassis ©
(Main) (Ground) (Main)
SL-P200 SL-P200
Checking Using Defect Disc
1. Play the 0.7mm black dot and the 0.7mm wedge on the
defect test disc (SZZP1054C) and verify that no sound
skip or noise occurs.
. Play the middle tracks of the uneven test disc and verify
that no sound skip or noise occurs.
Conversion connector
(SZZP1032F )
@
BLOCK
DIAGRAM
OF
SERVO
CIRCUIT
TRAVERSE UNIT
OPTICAL PICKUP
Tracking
coll drive
1C103
+
r---t-- &
8/3
8
+
o
FOCUS/TRACKING/
TRAVERSE COIL DRIVE
+8 v REF Best eye
Fosus | adj. (VR101)
offset
adj.
(VR105)
5
r | Addition (x2) Phase Shifter
balance iv Amp
=n
I 1
|
i)
! 1
3
AZ| A3} All At
2 3 +
Tracking
balance adj.
(VR106)
Vv REF
+8
SPEED
POSITION
SENSOR
30 20
On oe oe me oe ee -f--
101
Auto power
control ae
bw
APC driver
Tracking
offset adj.
(VR103)
Pot buffer
T
iC 101
SERVO AMP
Vv REF
be
Focus
Vv REF
12 36 37
ror
ly
-—-—0———-—
Om
Om
ee
OD
mmr
ir
er ae
3 FLOCK
1
&
SLC (TRON)
wel
O Frequency
detector
PLL
adj.
{VR104)
V REF
+e
crilics
Auto focus
Mmiter
Vv REF i)
Vv REF
hI
5
a
Sa
8
&
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23k
|
288
€
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D/A
CONVERTER
/AUDIO
CIRCUIT
tc102
SERVO CONTROLER
VREF
Note) ——s= P.B. signa!