Sharp DX-361HM Service Manual page 30

Signal Mode
Instrument
Oscilloscope Remarks
connection
HFI Test disc, play or service position 2
<@>
See Fig. 30-l.
XTAL2 Test disc, play or service position 2
<@>
11.28 MHz
MSC Test disc, play or service position 2
~
See Fig. 30-2.
Table 5 High speed disc rotation
100---+--+--+-+--+----11-+---)-+-----1
1
go ..
f---;1:;;;;;;j;;;t:::;t:.;:~t;:;+;:;:rih=li<-:
1
0 . Qr--.1. 5
,n,'"",'."v,,,,,,
VP-P
,".,',\"''',\,'1,\/'\
FI\F'\F'\F'
I~~~~~~~
10 .. • ..
I
Figure 30-1
LJlJL
POSITION:STAND BY
r I l L
POSITION: PLAY
(BEGINNING)
L __
i
L __
(--t _
POSITION: PLAY
(NORMAL>
Figure 30-2
Signal
Mode
Instrument
Oscilloscope
Remarks
connection
RE dig Test disc, play or service position 3
4P
Square wave
RE lag
<@>
DC level ±2.5V
C osc1 Test disc, play or service position 3
<@>
650 Hz
C osc2
Test disc, play or service position 3
<it>
650 Hz
LEAD Position stop
6R>
650 Hz
Sinus
'-.7
LEAD
Position play
<@>
See Fig. 30-3.
IDAC
Position play
<@>
Pulses low and high when bumped
against the CD Mechanism.
RE1 Position play
<§>
See Fig. 30-4.
RE2 Position play
~
See Fig. 30-4.
Table 6 Track following
Pf\f\
VVV
Figure 30-3
-30-
~/\I\
1\/\
VV V VlJ
Figure 30-4