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10. MECHANICAL ADJUSTMENTS
10.1 TOOLS AND JIGS REQUIRED FOR AD-
JUSTMENT
• Dual trace oscilloscope
• AF oscillator and frequency counter
• Video monitor and connecting cord
• Remote control unit ( option)
• LD test disc
• Eccentric screwdriver I (GGV-129)
10.2 ADJUSTMENT PRECAUTIONS
1) Handling the Test Disc
• When loading or unloading a disc, always return the player
to a nearly level position. When function key 2 is turned on
and the disc table is pushed in about 4 cm, playback will
start automatically. When this happens, press the [REJECT]
key of the remote control unit to stop the player; then stand
the player vertically after the disc stops turning.
• Do not press the [REJECT] key (~) on the front panel with
the player standing on end. Press only the [REJECT] key
of the remote control unit after the disc stops turning.
2) TRKG servo and SLDR servo open
• To open the TRKG servo, short between pins (20) and (22)
( +
5V) of IC301 of the SRVB assernbly {FTS section). If the
Pick-up assembly starts to move when the TRKG servo is
opened, the SLDR servo must also be opened. This can be
done by disconnecting the CN33 connector of the PREB
assembly.
C307 R317
(NPT
i
1
T
C308
I
VC201_,>.
o:J t-o
C208
C3H5
o-f J-o
o-1
f-o
oJ,M,--o
~
C316
C312
R314
R318
o-1
~
+
+
0 0 0 0 0 0 0 0 0 0 0 0 0 0
I
f
5
10
14
IC
301
28
20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
C317
C322
R35t
R335
(NP)
R334 R316
R337
R322
····J
f i t
+ f
½
+ + f I i i 11 i
R315
R3~
C3t8
0305
0304
R340 R336
c
2
o
7
0--AJ.l,,-0
0306
( NPI
~301
~
.,lf
,~J\
I
ctm
~~
•
!(~
305
'
R348 ( NP
I
Q30r o
o
o->.N,,-<J
I~
R323
R324
C340
0310
R319
l
l
l l Tl l J. t l
o->M o R
326
t
t
t f
I t
f f
o
f:1
o C309
0303 R327
R360 R356
( Np)
Fig. 10-1
The area around
I
C301
of
the
SRVB
assembly
C2<
• If an attempt is made to search with the TRKG servo opened
and the tracking servo will not close for some reason, the
Pick-up assembly will move close to the target area but the
search will not be completed so the image will not appear.
If this happens, press the
[CLEAR]
key to end the search
operation so that the image can be output.
When playback is started with the tracking servo open, the
[CLEAR] key must also be pressed to output the.image after
the disc reaches the correct speed (1800 rpm).
3) The test mode
•
This device is equipped with a test mode for adjusting inside
and outside position detection.
Turn off the power switch with the disc table closed; then
open the door in the front panel by hand and turn on the
power.
The test mode can be entered by the above operation (it is
all right if the door closes when the power switch is turned
on).
If a disc goes past the inside or outside position when played
by pressing the [DISPLAY] key with the player in the test
mode, an asterisk (*) will be displayed in the upper left cor-
ner of the monitor screen. This display will not appear if
within the playback area of the disc.
• In addition to the above, the test mode can also be used as
follows.
1.
Start-up
Turn on (down) function switch no. 8 (KEYB assembly) and
turn on the power.
OPEN
D
□
D
□
D D D
□
-(OFF)
1
2
3
4
5
6
7
8
-(ON)
Fig. 10-2
2. Start-up operations
G)
The LED indicators will light in the following sequence only
once when the power is turned on.
PARK
~
PLAY
~
SEARCH
~
AUDIO (2/R)
~
AUDIO
(1/L)
~
KEY LOCK
@
All of the characters will be displayed repeatedly on the
monitor in a 20 character x 9 column format.
@
The contents of the ROM of the MPU are checked. If there
is no problem, the ROM version and function key status will
be displayed
in
the 9th column on the monitor screen.
Typical display
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••••••••
1 0 0 4 : 1 0 0 0 0 0 0 0
45
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