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DOS LEVEL
Apply 5 BMH»:200mVp-p το ТР 11
Observe DOS OUT at UA5001 pir 14
Rotate CCW uru DOS OUT turns
H to L.
C NEGATIVE
EDGE
TMENT
SYNC
! 7
*
Monitor TV
*
Disc clamp
9
unit 30" from the horizontal.
the VSOP board.
terminal.
of Grating).
NOTE:
VOLTAGES.
. Tang. mirror
Lu
VSOP board TPs list
ТР-1
Focus error
1/6
To make tangential loop
2
OSC (focus) input
open, short to GND.
rror Stopper
3
Bridge balance
2
PBH
_
4
GND
3
REFH
TP-12
!
5
Tracking error
4
tangential error
1
6
OSC (tracking) input
5
N.C.
INT
X
SET POINT
Y
7
Tracking return
6/6
FG
Output
55
(V) |
— 040
(V)
8
Tomake tracking loop open,
50
— 045
short то GND.
-
š
9
GND
55 |
e 0.50
10
Focus drive
70
— 0.55
11
RF signal
30
= 0.65
12
Tangential return
A un
+
6
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