Sanyo DC D30 - Page 13

CD ADJUSTMENT
Electrical Adjustment TP2 owe Oscillo-Scope
So far we have presented explanations regarding compact disc anit e
player handling, notes prior to repair, handling the pick-up and 0rey 190K
disassembly of the unit. Be sure to carefully read these GND GNO
instructions before making any adjustments. BAND PASS FILTER
Preparations for Adjustments
Measuring instruments, tools and filter (4) Oscillator (400Hz, 300mV RMS)
(1) Test disc.: YEDS 18 (Sony) (5) Frequency Counter (SMHz; or more)
(2) Oscilloscope : $S5711(10MHz or dual phenomenon) (6) Screw drivers (non-metalic) for adjustments
or Memoryscope : D$S6521 (Storagescope) (7) Band Pass Filter
(3) Digital voltmeter (Input impedance 1Mohm or more) (8) AC Voltage Meter
Notes: a. The adjustments can be using the equipment produced by other manufactures provided that the performance of that
equipment corresponds to that of the above listed models.
b. Use a 10:1 probe for observing signals on the oscilloscope and storage scope.
c. Test disc is subject change without notice.
1. Initial set
Set the SVR11 at its initial position of adjustment controls as shown in figure below.
SVR11 oe.
INITIAL
SET
uaa
ee
(MECHANICAL
=
eo
~
7
'
SENTER)
if
|
»———_ TP4 (GND)
——— - — TP1 (RF)
2. Tracking Balance Adjustment (SVR11)
1. Connect the oscilloscope to TP3 (TE) and TP4(GND.). 5. Adjust SVR11 so that the TE (Tracking Error) signal wave-
2. Turn on the power of the unit. Insert test disc. form of TP3 on the oscilloscope is vertically symmetrical rel-
3. Play-back the test disc. ative to OV. (See figure right side)
4. Continuously press the forward search >» or backward- *If the adjustment is imperfect, become run away the sled
search >> button to do it motor (pick-up sending motor), inferior playability.
ve: Aenean bi pease a un
iw Whey y if aid ¥ t
re [Pr pa id
ay inves AMMA PN
a
1P3 Hit M jj Ht nit OV
cme) | F | nN ha wii ‘NTA Ra
Sale fed ses ele
4 SEARCH SEARCH b>
-12-