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NS) Ed O45)
Measuring Instruments and Special Tools
* Servo gain adjuster (SZZP1017F or SZZP1094C—1)
Test discs
. Playability test disc (SZZP1054C or SZZP1014F)
. Uneven test disc (SZZP1056C)
. Black band test disc (SZZP1057C)
Normal disc
Dual-beam oscilloscope with bandwidth of 30 MHz or
better (with EXT trigger and 1 : 1 probe).
Audio frequency (AF) osillator
Comversion connector (SZZP1032F)
¥¥
WD
= ¥
*
*
Audio frequency
oscillator
©OO9O
9
9
Servo gain adjuster
(SZ2ZP1017F)
GND OSC
@® ON/OFF switch
®
iN
di
GND®
Selector
Oscilloscope
Oscilloscope connection
0_0
terminals
wn
ovo
TP2 TP3TPI
CHI
rCH2
4
G
JCH1
©
(-12.1V)
GND
(+11.2V)
(Main) (Chassts) (Main)
(See page 15.)
Adjusting Procedure
*
If you have replaced the optical pickup, spindle motor,
or turntable, do the following adjustment:
(1) TURNTABLE
HEIGHT ADJUSTMENT
1. Insert the 0.9 mm clearance gauge (RZZ0297) between
the turntable and the loading base (see the figure at
right).
2. Tighten the turntable retention screw with the 1.27 mm
allen wrench.
3. Connect
the oscilloscope's CH. 1 probe across VR104's
(+) and VR106's
(—) terminals via
a filter.
(Note:
A voltage of 2.5V appears at the V. REF terminal.
Take care not to short the player's chassis to the oscil-
loscope ground.)
Oscilloscope setting: VOLT.......... 50 mV
SWEEP oe has
dds Tms.
Input coupling...
DC
4. Adjust oscilloscope's DC zero balance.
5. Switch
the player power
ON,
and
play the test disc
(SZZP1014F or SZZP1054C).
6. Measure
the
voltage
amplitude
of the
signal
on
the
oscilloscope.
Note
1. If the measured amplitude is within a range of +/—
15 mV, the turntable height is correct.
If it is outside
this range, adjust the turntable height by using the
clearance gauge as a pry.
If the amplitude exceeds +15 mV, lower turntable.
If the amplitude is below —15 mV, elevate the turntable.
Connection of servo gain adjuster
(If you use SZZP1094C, refer to included operating instructions.)
Oscillator connection terminals
* Allen wrench (M2.0) (SZZP1101C)
*
Allen wrench (M1.27)
*
0.9mm clearance gauge (RZZ0297)
* Filter
Perform adjustments depend on the part to be replaced
according to followings:
(1) Spindle MOtOr 0.0... cece ecccceeseetteseaeseeees Items 1,3 to 8
(2) TURN tal Ooi, cece sess sais od: dete, tosdédidicceeeeeesse es Items 1,3 to 8
(3) Optical PiCkUP.......
ce
cee ceccceeceessseeeenees Items 2 to 8
Conversion connector
(SZZP1032F)
To CN102
Turntable
Clearance gauge
(RZZ0297)
rosea sseee
0.9mm
OM
dh
WS
Deerscsscssesses:
W ts
33
Spindle motor
Note 2.
If the measured
amplitude
greatly surpasses
or
falls short of the range above, set VR105 at or around
the center, then try to adjust the height again. (Then
be sure to adjust the focus offset as well.)
Oscilloscope
eFilter for turntable height adjustment
Resistor:
ERDS2TJ103 (10kQ)
Capacitor: ECQV1H104KV
(0.1 uF)
n0ee
2416
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