Philips CD950 - Page 22

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24
DECODER
CIRCUIT
DIAGRAM
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1
2
3 4 5 6 7 8 9 10 2 1 16 uv 18 19 20 21 2
70 TRAY, SWITCH
+5uP +5uP 10 PIN 29-30 OF IC 7731
ON AUDIO CIRCUIT —s TF ee me ew ee ee ee ee ee ee ee ee ee To =
“RSOUT RSINY =f eae |
A
3703
z
3705
A
4h
sa
s
s
!
. BUADSEL +5uP +5uP -10V j
F | a
| 3 Pires — |
LOW
PULSES
=
32}
31
7701
FY
3708
4
3710
j
saa
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0
RS
ear
as
son
Pd
aye
7
|
= 603 3607 fe
©> {> 33s? 10 0 1 ry 3 FI ‘A a suv 22n
34
2 tae I PORT D !
REdig 5 605 -5V WHEN TRAY IS OPENING |
TL O—17 [Tok 6) +5V WHEN TRAY IS CLOSING :
3600
4
7600
OV
IN
REST
POSITION
|
O
CL
1
suse
1601-
21
FROM 80 © (| 5V OPENING a 2605 1601-1) TO TRAY MOTOR
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OV
CLOSING
100n
c|
SERVO
Ble
i
A
2,
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REST
POSITION
2
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36045
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2601
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D CRI/DODS & j
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+5uP +5uP #10V HIGH BY Sem DISC +5 12 CM DISC !
LOW
BY
12cm
DISC
|
my
|
aE 2 bs LOW DURING NEXT 1
7 wk saa vokla PREVIOUS, PAUSE 3150 +10V |
FY (200k) |
(P7721 loi 2]
CK ) acess if 43 "01, | 340 Fel Le cD
(220K) AE | t
oF
|
70
7131 B 3134 j TURNTABLE
2708 by 2707 2706-4 2705e :
6721 yaibq | 330 F220 22n T 2u2 amds60 Kye | sro
B2X79C3V9 16v 50V Uds/ 50338 |
° 3139 1101-15
T™
i] [>9 (TOR) ve
TO AUDIO O i
CIRCUIT
(PRESET
<2
!
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7 1133 .
FROM
SERVO
[DIV4
&
SOREA
+5VSB
CIPCUIT
21358 (4 3
4 220u 3138 Fey 3143 fog 2136 2137. jak
ant
MAKI
22n
220
AF
xo
fel
A
+5uP ————_—_——> +5uP ] 16V ut uw
+SVSB pe ————_——_—e +558 +10V -10V
‘ : 7204 7204 7204 10V ggg
$10V o_o +10 TAHCTOd = 74HCTOA T4HCTOA TAHCTOA 14 “
-10V ee -10V APT PLT | 911 FT R819 2292 $ a
i oie | 4 | t |
LOW DURING
7202 7203
-
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CURSOR
>>
T4RCL64
14164
ei08
1 2100 12 uo. ]
oc OF GG
od 8
i aaa |
Ip = 213
= 3100 2101 32 mie oO OOF CLK CLR
an? fy DATA DEMOD EFM SUBCODE P i C SHIFT REGISTER SHIFT REGISTER
3101 z SLICER IDECODEP, =
a
FROM
SERVO
CIRCUIT
ee
PROCESSOR
TIMING
J
2105
u 470n
2102 noe ae rrro coxtrou| |_|
ob 24 | HED ‘
n01 RAM INTERFACE
1 SAMPLE
ee (X) BF550
30 | CREF
INTERLEAVER INTERLEAVER
Point al
CLAB
1200 GND QD) QC OB GD 8 eC
PLT102
QB
INPUT VCC ILED
K ; PHASE &
310
4
FREQUENCY
FROM
29
|
_PD/OC
|
neTECTOR
Mele
OPTICAL
OUTPUT
CIRCUL
BU-6
3105 M4
20a 1
2u2/16V
6
33
eo
39
peal
gD es
25
X-TAL
26
TIMING CONTROLLER
= Ke
>
yyy &
TE
53
+SvsB SB OSCILLATOR 7204
28
2
J cIRCU
3102 2493
Hs | 4 ate | >on
34u/16V 7102
MN4264-15 +58
2194 0
an
>
Tl
6
PULSES WHEN DISC IS SLOWLY BRAKED BY HAND
= 2109 2108 za 3115 |e -- om came = 00
‘ + DIGITAL OUTP
304
118
o0é41R-C
22n
]
stad
|
CoD
11,2896
me
enti
I
3104
118
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9212 9212
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