Blockdiagram - Philips AZ7900 Service Manual

BLOCKDIAGRAM

DISC
TURNTABLE
MOTOR
12 10
TRACK
SERVO
9
FOCUS
SERVO
11
SLIDE
SERVO
PHOTO DIODE
ARRAY
D1
R1
D3
VAM2103/08
CD-DRIVE
eye-pattern signal
> 800 mVpp
1
TB=0.5µs
FLEX PCB
during focus search
2,5V
9
0
TB=0.1s
-2,5V
servo in or disc motor cw
10
3V
not moving
11
0
servo out or disc motor ccw
12
-3V
servo out or disc motor cw
13
3V
14 not moving
15 servo in or disc motor ccw
0
16
3-5
+3
LD LO VDDL
Lo Vddl LDon
LASER
SUPPLY &
L.P.F.
Hf
+
PROTECT.
Laser
diode MI
H.P.F.
Monitor
diode
R1 O6
L.P.F.
R2 O5
L.P.F.
D1 O1
L.P.F.
D2 O3
L.P.F.
D3 O4
L.P.F.
D2
L.P.F.
R2
TDA1300T
HF-PREAMPLIFIER
+A +3
VOLTAGE SQU. WAVE
+3A +3
DOUBLER GENERATOR
VR VLG VG CLK
CLsaw
LOW VOLTAGE SAWTOOTH
DETECTOR OSCILLATOR
H-BRIDGE
DM± DM_IN
MOTOR DRIVER 4
VG VLG VR CLsaw
H-BRIDGE SLIDE_IN
Sldm±
MOTOR DRIVER 2
VG VLG VR CLsaw
H-BRIDGE
Focus± FOCUS_IN
MOTOR DRIVER 1
VG VLG VR CLsaw
H-BRIDGE
Track± TRACK_IN
MOTOR DRIVER 3
VG VLG VR CLsaw
MPC17A50VM
SERVO DRIVER
LCD
P TMP47C422F
RAM LCD DRIVER
RESET
CLOCK GEN. TIMER/
& TIMING COUNTER
8.4MHz
MEMBRANE
I/O PORTS
KEYBOARD
DM
LDON H=Laser on
(TO SERVO DRIVER)
LDON
1
RFE HFIN EBU
FRONT END
INTERFACE
ERROR
DIGITAL PLL
CORRECT.
D5 R1
L.P.F.
EFM
D1 R2
SRAM
DEMOD.
L.P.F.
D2 D1
L.P.F.
D3 D2
CONTROL PART
L.P.F.
D4 D3
L.P.F.
FUNCTION
PRE-PROC.
D4
CONTROL
L.P.F.
HF-GAIN
VERSATILE
INTERFACE
INNERSWITCH
(FROM VAM2103/08)
SAA7324H
OUTPUT
CD10
STAGES
SL FO RA
16
DM
(FROM CD10)
L.P.F.
15
SL
(PWM signal)
L.P.F.
13
FO
(PWM signal)
L.P.F.
14
RA (PWM signal)
L.P.F.
3-5
+3
ROM
ALU
SILD
SCL
SDA
TO HEADPHONE AMP.
+3
8.4MHz
PORES
(FROM µP)
MOTO1 VDD
SUPPLY CIRCUIT
RESET
TIMING
DC-IN SOCKET
+
MOTOR SUBCODE
CONTROL PROCESS.
RAM PEAK
ADDRESS. DET.
SILD
SCL
SDA
µP
+A +3
INTERFACE
LOBAT LOBAT
AUDIO SERIAL
(TO µP)
DETECT.
PROCESS. INTERFACE
SERIAL
LOOPBACK
BITSTREAM
KILL
DAC
MUTE
(FROM µP)
MUTE
BIAS IN
BIAS
BIAS
VOLUME
IN A
ADD OUT
DBB NF
DBB OUT
IN B
TA2120FN
HEADPHONE AMP.
FUSE 630mA
+A
+
DC/DC
BATTERY +3
UP/DOWN
CONVERTER
HP_ON DBB_LINE BEEP +A
(FROM µP) (FROM µP)
(FROM CD10)
VCC
POW. DBB
BEEP
SW. SW. SW.
HEADPHONE
SOCKET
A (RIGHT)
Vref
B (LEFT)
CS 46 650