Sony Discman D-50MkII Service Manual page 79

Compact disc compact player
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SCHEMATIC DIAGRAM
[SERVO BOARD ]
[SUB BOARD]
cis tL S35
C21
25V
To
Téav
| T°
'i
TA}
OS APPROX,|00mVp -p
(Fn 9)
RF AMP/SIGNAL PROCESSOR
52
52
tcl (1/2)
5.2V
MIR!
MIRROR
COMPARATOR
.
——B0TTOM
HOLD
v ec
Vee
CURRENT.
VOLTAGE
REFERENCE
REFERENCE
VEE
SERVO OFF DET
C9 180p
;
:
7 a2
CH
[+
[RIS
q
6.8.
S1.8k
well
63V.
JUI%)
0.1
|__|
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|
ela
|
| |
rc Sets
:
5.2
p—4
5.2V
|
aaa
tL e543
|
sso _ |
0.1
eo
4,716.3V
\
LASER
ON
FOCUS/TRAC KING
| (%0 H atts ai s. ¢ ;
SLED SERVO
R504 22k
SERIAL NO.
10001 — 2500!
r
¢
as
FOCUS SEARCH
>
.
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ar
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eS
Ss
Sa
oe
T
=
FMG4
1
Ri?
(rdev$ ERROR]
$
10k
ERR
FOCUS GAIN
DOWN /NORMAL
R521 100k
RV502
bi
J
22k
4
803 [+
RV5O1
520
mu
22k
12k
COMPARATOR
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|
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NUM4556M
aD
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>.
C
AUTOMATIC POWER CONTROL
R505
if
va
ran
»
a e
{LASER ON CIRCUIT)
;
aA
Logic = [J LATCH
ADDRESS
aie
=
WINDOW
LT
COMPARATOR
HHH
ICl
as
cx26109
vee
neh
zzz
TRACKING ERROR AMP
:
eas
ml
2,5v|
TRACKING GAIN
T™4
!
ICI (1/2)
)
UP/ NORMAL
A
(=) -
woe
Teh
TRACKING ERROR
Q501
T
E
ame
LSVp—D
TMS
1
|
,
TRACKING GAl
aul
(TRACKING)
DURING FOCUS SERCH 6 1 drei ups a
°
C >)
|
ee
25,
Sete
ie
TRACK ING
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a
RAE
ren Led
* Lean
AMP
English
86C0589-1
7
Printed in Japan
9-952-109-91
Sony Corporation
© 1986
—2—

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