Philips FW-C155 Service Manual page 32

BLOCK DIAGRAM 3CDC-LLC-MCD1
CD MECHANISM MAINBOARD
MCD-1
DISC
TURNTABLE
16
FOCB+
MOTOR
FOCUS
MOTOR
13
FOCB-
9
RADIAL RADB+
MOTOR
12
RADB-
9
SLEDGEB+
SLEDGE
MOTOR
12
SLEDGEB-
13
TTM-
TURNTABLE
MOTOR
16
TTM+
LASER &
MONITOR
DIODE
7803,7802
LD
MON
PHOTO
DIODES
A-C
D C
E F
A B
INNER SWITCH
1876 1875
CAROUSEL
5 1
POS. RECOGNITION
1 5 1883 open if carousel is in a valid Play-Position.
1883
3 3 1882 closed if carousel is in Position 1.
1882
CD POS.1 SWITCH
2 4
CAROUSEL
MOTOR
4 2
TRAY
1,3 1,3
TRAY
MOTOR
2 2
1877 1878
10-5
7806
TDA7073A
1 55
FO
6 54
RA
7807
TDA7073A
7 56
SL
2 59
MOT1
60
1
MOT2
64
LD ON
CD RW= 3V 61
V4
CD DA= 0V
7810
EQ-Selection
7808,7809
2
HF IN
D1
A-D
D2
D3
D4
R1,R2
SWITCH INFO
1880
Closed if the tray is in one endposition.
Open during movement.
TRAY SWITCH
1881
Open if the drive is in one endposition.
Closed during movement.
CD DRIVE UP/DOWN SWITCH
7871
TDA7073A
16
2
13 1
12
7
9
6
7802
19
LP
SIGNAL PROCESSOR
18
LN
CD10
SAA7324 (SAA7325)
23
RP
22
RN
38
RESET
42
SILD
41 41
RAB RAB
40
SCL
39
SDA
VCC +3,3V
5,17,21,52,57
DOBM
V1
63 51
EBU OUT
7873
2
7
DATA
3
SHR_CL
6
1
STB
SHIFT
REGISTER
16
VDD
4
HEF4094BT
15
5
EN1
V
VDD (pin 16)
EN1 (pin 15)
t
12
D5
11
D3
14
D2
13
D0
10-5
+5V
8 7805
1805
5
+
19
6
6
CD LEFT
-
Active low pass
18
Filter
TDA1308
3
+
1 17
2
CD RIGHT
-
4
8
SILD
14
RAB
6
SICL
9
DATA
5802
3
EBU OUT
COAX2
4
COAX1
13
SWITCH INFO
12
SHR-DATA
11
SHR_CL
4
SHR_STR
+10V
5V1
7875
+5V
+3,3V
+4V
6877
16
+5V
+5V
14
+10V
+10V
Analog Audio
Communication
µP ↔ Signal Processor
Digital Audio
Changer
Control Logic
Supply
Blockdiagram 3CDC-LLC 2001-09-04